CN110723644A - Explosion-proof type bent rail formula hoist - Google Patents

Explosion-proof type bent rail formula hoist Download PDF

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Publication number
CN110723644A
CN110723644A CN201911082111.0A CN201911082111A CN110723644A CN 110723644 A CN110723644 A CN 110723644A CN 201911082111 A CN201911082111 A CN 201911082111A CN 110723644 A CN110723644 A CN 110723644A
Authority
CN
China
Prior art keywords
explosion
rope
winding drum
proof
upper limit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911082111.0A
Other languages
Chinese (zh)
Inventor
黄宇
陈海平
张超
宋坤
明红芳
肖立
段品佳
郭琦
陈懿
王海江
江力
陈嘉庆
于洋
李雅迪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNOOC Gas and Power Group Co Ltd
South China Marine Machinery Co Ltd
Original Assignee
CNOOC Gas and Power Group Co Ltd
South China Marine Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CNOOC Gas and Power Group Co Ltd, South China Marine Machinery Co Ltd filed Critical CNOOC Gas and Power Group Co Ltd
Priority to CN201911082111.0A priority Critical patent/CN110723644A/en
Publication of CN110723644A publication Critical patent/CN110723644A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00Trolleys or crabs, e.g. operating above runways
    • B66C11/08Trolleys or crabs, e.g. operating above runways with turntables
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00Trolleys or crabs, e.g. operating above runways
    • B66C11/14Trolleys or crabs, e.g. operating above runways adapted to operate on crane or bridge structure of particular configuration, e.g. on reinforced concrete girders of rectangular cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00Trolleys or crabs, e.g. operating above runways
    • B66C11/16Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/02Travelling gear incorporated in or fitted to trolleys or cranes for underhung trolleys or cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/04Travelling gear incorporated in or fitted to trolleys or cranes to facilitate negotiation of curves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/08Runners; Runner bearings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/14Trolley or crane travel drives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/16Travelling gear incorporated in or fitted to trolleys or cranes with means for maintaining alignment between wheels and track
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28Other constructional details
    • B66D1/30Rope, cable, or chain drums or barrels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28Other constructional details
    • B66D1/36Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
    • B66D1/38Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains by means of guides movable relative to drum or barrel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28Other constructional details
    • B66D1/40Control devices
    • B66D1/42Control devices non-automatic
    • B66D1/46Control devices non-automatic electric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54Safety gear
    • B66D1/56Adaptations of limit switches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54Safety gear
    • B66D1/58Safety gear responsive to excess of load

Abstract

The invention discloses an explosion-proof type curved rail type crane which comprises an explosion-proof electric walking trolley, a rotating device and an electric hoist body, wherein the explosion-proof electric walking trolley is distributed above the electric hoist body and is connected with the electric hoist body through the rotating device; the rotating device comprises a connecting beam, a rotating balance hanging shaft, a thrust ball bearing, a pin shaft and a joint bearing; the connecting beam is arranged between the wheel frames on the explosion-proof electric walking trolley, and two ends of the connecting beam are fixed on the wheel frames through locking pieces; the upper part of the rotary balance hanging shaft penetrates through the connecting cross beam and is movably suspended on the connecting cross beam through a fixing piece, and the thrust ball bearing is matched with the rotary balance hanging shaft and is fixedly embedded on the connecting cross beam; the hinge pin is arranged between the main body wallboards of the electric hoist body, two ends of the hinge pin are fixed on the main body wallboards through locking pieces, and the lower part of the rotary balance hanging shaft is connected with the hinge pin through a joint bearing.

Description

Explosion-proof type bent rail formula hoist
Technical Field
The invention relates to a crane, in particular to an explosion-proof type curved rail type crane which is applied to a tank top crane of a liquefied natural gas storage tank.
Background
In recent years, the LNG energy is valued by governments and users in various countries due to high heat value, clean and environment-friendly use, easy storage and good economy, along with the rapid promotion of the trade status of the LNG, the construction of an LNG receiving station in the coming years is planned in various countries in the world including our country, and each LNG storage tank top of the LNG receiving station needs to be matched with an explosion-proof crane to meet the hoisting working requirements of the installation, inspection and maintenance of an LNG pump. Therefore, the LNG storage tank top crane has huge market demand and good development prospect.
And each LNG storage tank top of the LNG receiving station needs to be matched with an explosion-proof crane to meet the hoisting working requirements of installation, inspection and maintenance of the LNG pump. Because the LNG pump is high in manufacturing cost, the requirement for micro-speed accurate positioning and installation needs to be met during installation, the low-pressure pump body can be damaged by collision with a pump well when the LNG pump is not operated properly, the LNG has the characteristics of flammable and explosive media, the safe and harsh use conditions of high explosion-proof grade, accurate action positioning, large motor high-low speed ratio and the like of the tank top crane are determined, and the crane is in the marine environment for a long time, so that the crane has extremely high reliability, maintainability and environmental adaptability.
There are two types of existing LNG tank top cranes: the crane is an electrohydraulic explosion-proof crane, the crane realizes the actions of amplitude variation, lifting and rotation of the crane for a motor-driven hydraulic pump, when the crane is used as a crane for maintaining a low-pressure pump, because a hydraulic system is adopted, hydraulic oil has leakage risk, the leaked hydraulic oil easily pollutes the tank top of a clean LNG storage tank, and secondly, the hydraulic system is not accurately controlled and has buffering and is far different from the high accuracy required by the maintenance operation of the low-pressure pump, so the crane is applied to a few projects and is not applied to subsequent projects; the other type is an electric explosion-proof swing-arm crane, the crane has the technologies of large-ratio and double-speed control, double-roller design and the like, and can meet the application requirements of 16-ten-thousand-square LNG storage tanks.
With the gradual maturity of the domestic LNG storage tank technology and the requirement of energy storage and supply, the LNG storage tank is developed from 16 ten thousand directions to 20 ten thousand directions, 22 ten thousand directions and more tank capacity directions, according to the large-scale trend of the LNG storage tank, the LNG storage tank has three changes, that is, the diameter of ① storage tank is gradually increased from 80m to 90m or even more, the number of pump wells of ② large-scale storage tank is increased from 4 pump wells of 16 ten thousand directions to 6 pump wells, ③ LNG storage tank needs to be provided with an LNG shipping pump according to the requirement of LNG return transmission function of an LNG receiving station, the weight of LNG storage tank is 2-2.5 times of the weight of the conventional LNG low-pressure pump, and is increased from 2.5t to 6 t.
Because the traditional swing-arm crane is limited by the factors of the length and the stress analysis of the swing arm, the design requirements of the first two points in the three-aspect change of the LNG storage tank cannot be met. Meanwhile, the requirement for changing the LNG storage tank at a third point is that an LNG shipping pump is installed on the LNG storage tank, so that the lifting capacity of the jib crane is required to be increased, the counter weight is correspondingly increased, the foundation strength of the installation position of the upright column needs to be enhanced, and reinforcing bars are added. Due to the factors, the application range of the swing-arm crane for the large-sized storage tank is limited, and the requirements of actual engineering projects are difficult to meet.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an explosion-proof type curved rail crane, which is capable of adapting to the trend of large-scale LNG storage tanks and has high reliability, maintainability and environmental applicability.
In order to achieve the purpose, the invention adopts the following technical scheme that the explosion-proof type curved rail type crane is characterized in that: the anti-explosion electric walking trolley is distributed above the electric hoist body and is connected with the electric hoist body through the rotating device;
the rotating device comprises a connecting beam, a rotating balance hanging shaft, a thrust ball bearing, a pin shaft and a joint bearing, the connecting beam is arranged between wheel frames on the explosion-proof electric walking trolley, and two ends of the connecting beam are fixed on the wheel frames through locking pieces; the upper part of the rotary balance hanging shaft penetrates through the connecting cross beam and is movably suspended on the connecting cross beam through a fixing piece, and the thrust ball bearing is matched with the rotary balance hanging shaft and is fixedly embedded on the connecting cross beam; the pin shaft is arranged on a connecting support, and the connecting support is connected with a main body wallboard of the electric hoist body; the lower part of the rotary balance hanging shaft is connected with a pin shaft through the joint bearing.
Preferably, the explosion-proof electric walking trolley comprises a driving wheel assembly and a driven wheel assembly which are arranged above the electric block body at intervals in parallel;
the driving wheel component comprises a driving wheel frame, a driving wheel set, a closed gearbox, a closed speed reducer and an operation motor, wherein the driving wheel set is arranged on the driving wheel frame, the closed gearbox is in transmission connection with the driving wheel set, and the operation motor is in transmission connection with the closed gearbox through the closed speed reducer;
the driven wheel assembly comprises a driven wheel frame and a driven wheel set arranged on the driven wheel frame; the wheels of the driving wheel set and the driven wheel set are directly machined and formed by adopting high-strength stainless steel made of 0Cr17Ni4Cu4 Nb; the running motor is a motor with a brake.
Preferably, the explosion-proof type curved rail crane is matched with a guide rail on the top of the LNG storage tank for use, and the guide rail is a curved rail-shaped guide rail which is constructed by a steel structure and is uniformly distributed on the top of the LNG storage tank; the explosion-proof electric walking trolley is arranged on the track of the curved-rail-shaped guide rail in a matching way, and horizontal guide wheel sets are respectively arranged on a driving wheel carrier and a driven wheel carrier of the explosion-proof electric walking trolley and close to the flange of the track of the curved-rail-shaped guide rail;
the starting end and the tail end of the guide rail are both provided with mechanical limit and electrical limit, and the explosion-proof electric walking trolley is provided with an alarm matched with the mechanical limit and the electrical limit.
Preferably, the electric hoist body comprises a winding drum device, an explosion-proof lifting motor of a lifting speed reducer, a steel wire rope and a lifting hook; the winding drum device comprises a winding drum made of DH36 marine high-strength plates, the winding drum is rotatably arranged between the main body wall plates, and a spiral rope groove is formed on the outer peripheral wall of the winding drum and along the axis of the winding drum; the lifting speed reducer is fixed on the main body wallboard on one side, and an output shaft of the lifting speed reducer is connected with one end of the winding drum; the explosion-proof lifting motor is fixed on the main body wall plate on the other side and is connected with the other end of the winding drum; the steel wire rope is wound in the spiral rope groove on the winding drum, one end of the steel wire rope is fixed on the winding drum, the other end of the steel wire rope is connected with the lifting hook, and the explosion-proof lifting motor is a motor with a brake.
Preferably, the winding drum is divided into a low-temperature rope area and a normal-temperature rope area, spiral rope grooves are formed in the low-temperature rope area and the normal-temperature rope area of the winding drum respectively, the steel wire rope wound in the low-temperature rope area can adapt to the low-temperature condition in the LNG storage tank and is used for hoisting equipment inside the LNG storage tank, and the steel wire rope wound in the normal-temperature rope area is used for hoisting equipment outside the LNG storage tank.
Preferably, the electric hoist body further comprises a rope pressing device matched with the winding drum device, and the rope pressing device comprises a winch wallboard, a connecting rod, a spring and a pressing roller;
the winch wallboard is distributed and fixed on the front side of the main body wallboard along the axial direction of the winding drum, the compression roller is pressed on the spiral rope groove along the axial direction of the winding drum, the two connecting rods are distributed on two sides of the compression roller, one end of each connecting rod is connected with one end of the compression roller, and the other end of each connecting rod is hinged to the winch wallboard through a support; each connecting rod is connected with a spring; one end of the spring is fixed on the connecting rod, and the other end of the spring is fixed on the winch wallboard.
Preferably, the electric hoist body further comprises a rope arranging device arranged below the winding drum device in parallel, wherein the rope arranging device comprises a screw rod, a guide roller, a sliding block and a driving mechanism;
the lead screw is distributed below the winding drum device and is rotatably connected between the main body wall plates, the guide rod is parallel to the lead screw and is fixed between the main body wall plates, the guide roller is installed on the guide rod in a matching mode, the sliding block is matched on the lead screw in a threaded mode, the guide roller is connected with the sliding block, and the driving mechanism is connected with the lead screw; the free end of the steel wire rope bypasses the guide roller to be vertically downward connected with the lifting hook, and the vertical pulling direction of the steel wire rope is overlapped with the center of the winding drum device.
Preferably, the installation limiting device further comprises a safety limiting device, wherein the installation limiting device comprises a first upper limiting device and a first lower limiting device which are distributed below the winding drum and arranged on the upstream side and the downstream side of the normal temperature rope area, and a second upper limiting device which is distributed below the winding drum and arranged on the upstream side of the low temperature rope area; the first upper limit of the normal-temperature rope area and the second upper limit of the low-temperature rope area are used for limiting the winding of the steel wire rope by the winding drum until the lifting hook rises to a position about 1.5 meters away from the center of the winding drum, the first lower limit of the normal-temperature rope area is used for limiting 3-5 circles of steel wire rope left on the winding drum after the winding drum transfers the steel wire rope, and a switch device for controlling the switching of the first upper limit in the normal-temperature rope area and the second upper limit in the low-temperature rope area is arranged on the main body wallboard; and the electric hoist body is provided with an alarm matched with a first upper limit and a first lower limit in the normal-temperature rope area and a second upper limit in the low-temperature rope area.
Preferably, the first upper limit, the first lower limit and the second upper limit are mounted below the winding drum through mounting plates, two ends of each mounting plate are fixed on the main body wall plate, and the first upper limit, the first lower limit and the second upper limit have the same structure and respectively comprise a limit seat, a rope pressing wheel arm, a rope pressing wheel shaft, a rope pressing wheel, a limit plate, a spring, a travel switch and a collision block;
the limiting seat is horizontally arranged on the mounting plate, and the two rope pressing wheel arms are connected to the limiting seat in a parallel and rotating manner; the limiting plate is horizontally arranged on the two rope pressing wheel arms; the spring is vertically arranged between the limiting plate and the limiting seat, so that the two rope pressing wheel arms are arranged in an upward inclined manner relative to the limiting seat; the rope pressing wheel is rotatably connected between the two rope pressing wheel arms through a rope pressing wheel shaft, the central axis of the rope pressing wheel is overlapped with the central axis of the winding drum, and the outer circumference of the rope pressing wheel is in contact with the outer circumference of the winding drum; the travel switch is fixedly arranged on the limiting seat and is connected with a power circuit of the explosion-proof lifting motor; the collision block is fixedly arranged on the limiting plate, and when a steel wire rope wound on the winding drum is extruded with the outer peripheral wall of the rope pressing wheel, the collision block moves downwards to trigger the control end on the travel switch so as to enable the explosion-proof lifting motor to stop running after power failure; the travel switches of the first upper limit and the second upper limit are both normally closed travel switches, and the travel switch of the first lower limit is a normally open travel switch;
one side of the rope pressing wheel on the first upper limit and the first lower limit is of a frustum structure, and the side of the rope pressing wheel which is of the frustum structure faces the downstream side of the normal temperature rope area; one side of the rope pressing wheel on the second upper limit is of a frustum structure, and one side of the rope pressing wheel on the second upper limit, which is of the frustum structure, faces the downstream side of the low-temperature rope area.
Preferably, the anti-explosion electric walking trolley further comprises a control system, wherein the control system comprises an anti-explosion control box and an anti-explosion control handle, the anti-explosion control box is installed on the main body wall plate and is connected with a power supply through a flexible cable type power supply introducer, the anti-explosion control box is connected with electric devices on the anti-explosion electric walking trolley and the electric hoist body through cables, and the anti-explosion control handle is connected with the anti-explosion electric device control box through cables;
still include the measuring force device, the measuring force device is including installing the two round pin axle type sensors of main part wallboard and the interconnect's of connecting support fulcrum department for gather the load information of hoist in real time set up the load alarm on the electric block body, round pin axle type sensor and load alarm all are connected with explosion-proof control box, explosion-proof control handle includes the control box, be provided with display screen and action control button on the control box, the display screen is used for showing the load value of hoist.
By adopting the technical scheme, the invention has the following advantages: 1. the crane adopts the rotating device to connect the walking trolley with the electric hoist body, overcomes the problem that the traditional electric walking trolley only can walk along a straight line and can block a track due to the fact that the balance connected with the electric hoist body cannot be adjusted during turning, enables the crane to be suitable for curved rail walking, and provides an equipment foundation for the large-scale trend of the LNG storage tank. 2. The drum of the drum device adopts the DH36 marine high-strength plate, has the characteristics of high strength, high stability, low deflection and the like, can meet the requirement of normally lifting the LNG pump in the pump well at the top of the LNG storage tank, and improves the reliability of the crane. 3. According to the explosion-proof electric walking trolley, the horizontal guide wheel sets are respectively arranged on the driving wheel frame and the driven wheel frame and close to the rail flange of the curved guide rail, so that the walking stability of the electric walking trolley along the guide rail is improved, and the damage caused by extrusion friction between the wheel flange on the inner side of the wheel and the rail is reduced. 4. The invention also comprises a safety limiting device, an alarm, mechanical limiting and electrical limiting, and can improve the safety of the crane.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention from another perspective;
FIG. 3 is a schematic view of the structure of the rotating device of the present invention;
FIG. 4 is a schematic structural view of the explosion-proof electric walking trolley of the invention;
FIG. 5 is a schematic structural view of the explosion-proof electric walking trolley of the invention from another view angle;
FIG. 6 is a schematic view of the construction of the rope pressing device of the present invention;
FIG. 7 is a partial schematic view of the cord pressing device of the present invention;
FIG. 8 is a schematic view of the configuration of the roping arrangement of the present invention;
FIG. 9 is a schematic view of the construction of the reel apparatus of the present invention;
FIG. 10 is a schematic view of the mounting structure of the first, second upper limit and first lower limit of the present invention;
FIG. 11 is a side view schematic of the structure of FIG. 10;
FIG. 12 is a schematic structural diagram of the first, second upper limits and the first lower limit of the present invention;
FIG. 13 is a schematic top view of the structure of FIG. 11;
FIG. 14 is a schematic left side view of the structure of FIG. 11;
FIG. 15 is a schematic view of the construction of the guide rail of the present invention;
fig. 16 is a schematic structural view of the pin-type sensor of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
As shown in fig. 1 to 3, the invention provides an explosion-proof type curved rail type crane, which comprises an explosion-proof electric walking trolley 1, a rotating device 2 and an electric hoist body 3, wherein the explosion-proof electric walking trolley 1 is distributed above the electric hoist body 3 and is connected with the electric hoist body 3 through the rotating device 2;
the rotating device 2 comprises a connecting beam 21, a rotating balance hanging shaft 22, a thrust ball bearing 23, a pin shaft 24 and a joint bearing 25; the connecting beam 21 is arranged between the wheel frames 10 on the explosion-proof electric walking trolley 1, and two ends of the connecting beam 21 are fixed on the wheel frames 10 through locking pieces 26; the upper part of the rotating balance hanging shaft 22 penetrates through the connecting cross beam 21 and is movably suspended on the connecting cross beam 21 through a fixing piece 27, and the thrust ball bearing 23 is matched with the rotating balance hanging shaft 22 and is fixedly embedded on the connecting cross beam 21; the pin shaft 24 is arranged on the connecting support 28, and the connecting support 28 is connected with a main body wallboard 30 of the electric hoist body 3; the lower part of the rotating balance hanging shaft 22 is connected with a pin shaft 24 through a joint bearing 25. The rotating balance hanging shaft 22 can rotate around the axis of the thrust ball bearing 23 and can be aligned to enable the explosion-proof electric walking trolley 1 to be balanced in rotation, and the joint bearing 25 is a sliding bearing with a special structure and mainly comprises an inner ring with an outer spherical surface and an outer ring with an inner spherical surface, can bear larger load and can bear radial load and axial load or combined load existing in both radial direction and axial direction. Because joint bearing surface is spherical, can make the aligning motion in certain angle range, when round pin axle 24 and joint bearing 25 decentraction are great, still can normally work, adjust simultaneously that the atress is balanced between electric block body 3 and the explosion-proof electronic walking dolly 1 for the hoist can stably walk on the bent rail.
In the above embodiment, preferably, as shown in fig. 1, 4, and 5, the explosion-proof electric walking trolley 1 includes a driving wheel assembly 11 and a driven wheel assembly 12 that are arranged above the electric hoist body 3 at intervals in parallel, the driving wheel assembly 11 includes a driving wheel carrier 111, a driving wheel set 112, a closed gearbox 113, a closed speed reducer 114, and an operation motor 115, the driving wheel set 112 is mounted on the driving wheel carrier 111, the closed gearbox 113 is in transmission connection with the driving wheel set 112, and the operation motor 115 is in transmission connection with the closed gearbox 113 through the closed speed reducer 114; driven wheel assembly 12 includes a driven wheel carrier 121 and a driven wheel set 122 mounted on driven wheel carrier 121; the wheels of the driving wheel set 112 and the driven wheel set 122 are made of 0Cr17Ni4Cu4Nb high-strength stainless steel and are directly machined and formed, the closed gear box 113 and the closed speed reducer 114 are used as a transmission mechanism, spark caused by gear contact in the transmission mechanism is avoided, mechanical spark prevention is achieved, and meanwhile the wheels are made of explosion-proof materials, so that the electric walking trolley can meet the explosion-proof requirement.
In the above embodiment, preferably, as shown in fig. 4, 5, and 15, the explosion-proof type curved rail crane is used in cooperation with the guide rail 4 on the tank top of the LNG storage tank, and the guide rail 4 is a curved rail-shaped guide rail constructed by steel structures uniformly distributed on the tank top of the LNG storage tank; the explosion-proof electric walking trolley 1 is installed on a track of the curved-track-shaped guide rail 4 in a matched mode, the horizontal guide wheel sets 5 are arranged on the driving wheel frame 111 and the driven wheel frame 121 of the explosion-proof electric walking trolley 1 and close to the track flange of the curved-track-shaped guide rail 4 respectively, the horizontal guide wheel sets 5 roll along the track of the curved-track-shaped guide rail 4 when the trolley turns, a guiding effect is achieved, and meanwhile, the inner wheel flanges of wheels of the walking trolley 1 can be protected from being damaged due to extrusion friction with the track.
In the above embodiment, preferably, as shown in fig. 1 and 6, the electric hoist body 3 includes a winding drum device 31, a hoisting reducer 32, an explosion-proof hoisting motor 33, a wire rope 34 and a hook 35; the reel device 31 comprises a reel 310 made of DH36 marine high-strength board, the reel 310 is rotatably arranged between the main body wall boards 30, a spiral rope groove 311 is formed on the outer peripheral wall of the reel 310 and along the axis thereof; a lifting speed reducer 32 is fixed on the main body wall plate 30 on one side, and an output shaft of the lifting speed reducer 32 is connected with one end of the winding drum 310; the explosion-proof lifting motor 33 is fixed on the main body wall plate 30 at the other side, and the explosion-proof lifting motor 33 is connected with the other end of the winding drum 310; the wire rope 34 is wound in the spiral groove 311 of the winding drum 310, one end of the wire rope 34 is fixed on the winding drum 310, and the other end of the wire rope 34 is connected with the hook 35. The winding drum 310 is made of a DH36 marine high-strength plate, the material has the characteristics of high strength, high stability, low deflection and the like, the LNG pump in a pump well can be lifted normally on an LNG tank top, the high strength is used for supporting the normal work of the whole crane, the high stability is an important condition for the safe operation of each action of the crane, and the low deflection is used for ensuring the safe operation of a lifting travelling mechanism on a designed track.
In the above embodiment, as shown in fig. 9, it is preferable that the winding drum 310 is divided into a low temperature rope region a and a normal temperature rope region b, spiral rope grooves 311 are formed in the low temperature rope region a and the normal temperature rope region b of the winding drum 310, the steel wire rope wound in the low temperature rope region a can be adapted to the low temperature condition in the LNG storage tank and is used for hoisting the equipment inside the LNG storage tank, the steel wire rope wound in the normal temperature rope region b is used for hoisting the equipment outside the LNG storage tank, the steel wire rope wound in the low temperature rope region a has two specifications of Φ 14.3mm and Φ 22.2mm, in order to facilitate the rope returning operation of the two low temperature ropes, the width of the spiral rope grooves 311 located in the low temperature rope region a is 11.1mm, and the distance between the rope grooves 311 is 23 mm.
In the above embodiment, preferably, as shown in fig. 6 and 7, the electric hoist body 3 further includes a rope pressing device 36 engaged with the drum device 31, and the rope pressing device 36 includes a winch wall plate 361, a connecting rod 362, a spring 363, and a pressing roller 364; the winch wall plate 361 is distributed along the axial direction of the winding drum 310 and fixed on the front side of the main body wall plate 30, the pressing roller 364 is pressed on the spiral rope groove 311 along the axial direction of the winding drum 310, the two connecting rods 362 are distributed on two sides of the pressing roller 364, one end of each connecting rod 362 is connected with one end of the pressing roller 364, and the other end of each connecting rod 362 is hinged on the winch wall plate 361 through a support; each connecting rod 362 is connected with a spring 363, one end of the spring 363 is fixed on the connecting rod 362, the other end of the spring 363 is fixed on the winch wall plate 361, and the compression roller 364 is always pressed on the spiral rope groove 311 of the winding drum 310 by utilizing the telescopic motion of the spring 363, so that the steel wire ropes 34 are smoothly arranged.
In the above embodiment, preferably, as shown in fig. 8, the electric block body 3 further includes a rope arranging device 37 disposed in parallel below the winding drum device 31, and including a screw rod 371, a guide rod 372, a guide roller 373, a slider 374, and a driving mechanism 375; the screw rod 371 is distributed below the roller device 31 and is rotatably connected between the main body wall boards 30, the guide rod 372 is parallel to the screw rod 371 and is fixed between the main body wall boards 30, the guide roller 373 is installed on the guide rod 372 in a matching mode, the sliding block 374 is in threaded matching on the screw rod 371, the guide roller 373 is connected with the sliding block 374, and the driving mechanism 375 is connected with the screw rod 371; the free end of the steel wire rope 34 bypasses the guide roller 373 to be vertically downward connected with the lifting hook 35, the vertical drawing direction of the steel wire rope 34 coincides with the center of the winding drum 310, the winding drum 310 is prevented from deforming in the hoisting process, the winding drum 310 rotates to wind the steel wire rope 34, meanwhile, the driving mechanism 375 drives the screw rod 371 to rotate, the sliding block 374 drives the guide roller 373 to slide along the screw rod 371, so that the steel wire rope is wound in the spiral rope groove 311 along the axial direction of the winding drum 310, and the stacking phenomenon of the steel wire rope 34 in the winding process is avoided.
In the above embodiment, preferably, as shown in fig. 10, in order to ensure the normal and safe operation of the crane on the top of the LNG storage tank according to the meteorological conditions of the position of the LNG storage tank, the present invention includes a safety limiting device to prevent safety accidents caused by misoperation or unattended observation of an operator during the operation. The installation limiting means includes a first upper limit 7 and a first lower limit 8 distributed below the winding drum 310 and disposed at the upstream side and the downstream side of the normal temperature rope region b, and a second upper limit 9 distributed below the winding drum 310 and disposed at the upstream side of the low temperature rope region a; the first upper limit 7 of the normal temperature rope area b and the second upper limit 9 of the low temperature rope area a are used for limiting the winding drum 310 to wind the steel wire rope until the lifting hook 35 rises to a position about 1.5 meters away from the center of the winding drum 310, the first lower limit 8 of the normal temperature rope area b is used for limiting the winding drum 310 to lower the steel wire rope, 3-5 circles of the steel wire rope are left on the winding drum 310, a switch device (not shown in the figure) for controlling the switching of the first upper limit 7 in the normal temperature rope area b and the second upper limit 9 in the low temperature rope area a is arranged on the main body wallboard 30, the steel wire rope on the winding drum 310 can be prevented from being excessively wound and unwound by means of the first upper limit 7, the first lower limit 8 and the second upper limit 9, and the winding drum 310 can conveniently wind the steel wire rope in the low temperature. An alarm (not shown in the figure) matched with a first upper limit 7 and a first lower limit 8 in the normal temperature rope area b and a second upper limit 9 in the low temperature rope area a can be arranged on the electric hoist body 3.
In the above embodiment, preferably, as shown in fig. 11 to 14, the first upper limit 7, the first lower limit 8 and the second upper limit 9 are installed below the winding drum 310 through the installation plate 100, two ends of the installation plate 100 are fixed on the main body wall plate 30, and the first upper limit 7, the first lower limit 8 and the second upper limit 9 have the same structure and each include the limit seat 110, the rope pressing wheel arm 120, the rope pressing wheel shaft 130, the rope pressing wheel 140, the limit plate 150, the spring 160, the travel switch 170 and the striking block 180;
the limiting seat 110 is horizontally arranged on the mounting plate 100, and the two rope pressing wheel arms 120 are connected to the limiting seat 110 in a parallel and rotating manner; the limiting plate 150 is horizontally arranged on the two rope pressing wheel arms 120; the spring 160 is vertically arranged between the limiting plate 150 and the limiting seat 110, so that the two rope pressing wheel arms 120 are arranged in an upward inclined manner relative to the limiting seat 110; the rope pressing wheel 140 is rotatably connected between the two rope pressing wheel arms 120 through a rope pressing wheel shaft 130, the central axis of the rope pressing wheel 140 is overlapped with the central axis of the winding drum 310, and the outer circumference of the rope pressing wheel 140 is contacted with the outer circumference of the winding drum 310; the travel switch 170 is fixedly arranged on the limiting seat 110 and is connected with a power circuit of the explosion-proof lifting motor 33; the collision block 180 is fixedly arranged on the limiting plate 140, and when the steel wire rope wound on the winding drum 310 is extruded with the outer peripheral wall of the rope pressing wheel 140, the collision block 180 moves downwards to trigger the control end on the travel switch 170, so that the explosion-proof lifting motor 33 is powered off and stops running; the travel switches 170 of the first upper limit 7 and the second upper limit 9 are both normally closed travel switches, and the travel switch 170 of the first lower limit 8 is a normally open travel switch.
In the above embodiment, preferably, one side of the sheave 130 at the first upper limit 7 and the first lower limit 8 is of a frustum structure, and the one side of the sheave 130 having the frustum structure faces the downstream side of the normal temperature rope region b, one side of the sheave 130 at the second upper limit 9 is also of a frustum structure, and the one side of the sheave 130 having the frustum structure at the second upper limit 9 faces the downstream side of the low temperature rope region a, so that the wire rope can be prevented from colliding with the end surface of the sheave 130.
In the above embodiment, preferably, the starting end and the tail end of the guide rail 4 are both provided with a mechanical limit and an electrical limit, when the explosion-proof electric walking trolley 1 moves to the tail end of the guide rail 4, the mechanical limit is touched, the movement is stopped, and even if the mechanical limit fails, the electrical limit can also stop the movement of the explosion-proof electric walking trolley 1, so that the safe operation of the crane is ensured. Can set up the alarm with mechanical spacing and the spacing matching of electricity on explosion-proof electronic walking dolly 1, when explosion-proof electronic walking dolly 1 runs into mechanical spacing or electricity spacing, the alarm reports to the police to and remind the operator in time.
In the above embodiment, preferably, the mechanical limit may adopt a buffer structure such as a triangle car bumper or the like installed at the beginning and the end of the guide rail 4; the electrical limit can adopt a travel switch.
In the above embodiment, preferably, the invention further comprises a control system, the control system comprises an explosion-proof control box and an explosion-proof control handle, the explosion-proof control box is mounted on the main body wall board 30, the explosion-proof control box is connected with the power supply through a flexible cable type power supply introducer, the explosion-proof control box is connected with electric devices on the explosion-proof electric walking trolley 1 and the electric hoist body 3 through cables, the explosion-proof control handle is connected with the explosion-proof electric device control box through a cable, and an operator can control the operation of the whole explosion-proof type curved track crane through the explosion-proof control handle.
In the above embodiment, preferably, as shown in fig. 16, the present invention further includes a force measuring device, the force measuring device includes two pin shaft sensors 6 installed at the mutually connected supporting points of the main body wall panel 30 and the connecting support 28, and is used for collecting load information of the crane in real time, a load alarm is arranged on the electric hoist body 3, both the pin shaft sensors 6 and the load alarm are connected with the explosion-proof control box, the explosion-proof control handle includes a control box, a display screen and an action control button are arranged on the control box, the display screen is used for displaying a load value of the crane, the action control button includes a power control button, a brake button, an alarm control button, a crane operation speed control button, an emergency stop button, etc. to facilitate operation and control of the crane,
in the above embodiment, preferably, the operation motor 115 and the explosion-proof lifting motor 33 both adopt motors with brakes, and in a normal use process, when the motors are powered on and operated, the brakes are opened, and when the motors are powered off, the brakes are closed (i.e., the brakes are dead).
In the above embodiment, the hook 35 is preferably made of alloy steel, and is a single hook with a safety cable pin.
The present invention has been described with reference to the above embodiments, and the structure, arrangement, and connection of the respective members may be changed. On the basis of the technical scheme of the invention, the improvement or equivalent transformation of the individual components according to the principle of the invention is not excluded from the protection scope of the invention.

Claims (10)

1. The utility model provides an explosion-proof type bent rail formula hoist which characterized in that: the anti-explosion electric walking trolley comprises an anti-explosion electric walking trolley (1), a rotating device (2) and an electric hoist body (3), wherein the anti-explosion electric walking trolley (1) is distributed above the electric hoist body (3) and is connected with the electric hoist body (3) through the rotating device (2);
the rotating device (2) comprises a connecting beam (21), a rotating balance hanging shaft (22), a thrust ball bearing (23), a pin shaft (24) and a joint bearing (25); the connecting beam (21) is arranged between the wheel frames (10) on the explosion-proof electric walking trolley (1), and two ends of the connecting beam (21) are fixed on the wheel frames (10) through locking pieces (26); the upper part of the rotary balance hanging shaft (22) penetrates through the connecting cross beam (21) and is movably suspended on the connecting cross beam (21) through a fixing piece (27), and the thrust ball bearing (23) is matched with the rotary balance hanging shaft (22) and is fixedly embedded on the connecting cross beam (21); the pin shaft (24) is arranged on a connecting support (28), and the connecting support (28) is connected with a main body wallboard (30) of the electric hoist body (3); the lower part of the rotary balance hanging shaft (22) is connected with a pin shaft (23) through the joint bearing (25).
2. The explosion-proof type curved rail crane according to claim 1, wherein: the explosion-proof electric walking trolley (1) comprises a driving wheel assembly (11) and a driven wheel assembly (12) which are arranged above the electric hoist body (3) in parallel at intervals;
the driving wheel component (11) comprises a driving wheel frame (111), a driving wheel set (112), a closed gearbox (113), a closed speed reducer (114) and an operation motor (115), wherein the driving wheel set (112) is installed on the driving wheel frame (111), the closed gearbox (113) is in transmission connection with the driving wheel set (112), and the operation motor (115) is in transmission connection with the closed gearbox (113) through the closed speed reducer (114);
the driven wheel assembly (12) comprises a driven wheel frame (121) and a driven wheel set (122) arranged on the driven wheel frame (121); the wheels of the driving wheel set (112) and the driven wheel set (122) are both directly machined and formed by adopting high-strength stainless steel made of 0Cr17Ni4Cu4 Nb; the running motor (115) is a motor with a brake.
3. An explosion proof type curved rail crane as set forth in claim 2, wherein: the anti-explosion type curved rail crane is matched with a guide rail (4) on the top of the LNG storage tank for use, and the guide rail (4) is a curved rail-shaped guide rail which is constructed by steel structures and uniformly distributed on the top of the LNG storage tank; the explosion-proof electric walking trolley (1) is installed on the track of the curved-rail-shaped guide rail in a matching mode, and horizontal guide wheel sets (5) are respectively arranged on a driving wheel carrier (111) and a driven wheel carrier (121) of the explosion-proof electric walking trolley (1) and close to the track flange of the curved-rail-shaped guide rail;
the starting end and the tail end of the guide rail (4) are both provided with mechanical limit and electrical limit, and an alarm matched with the mechanical limit and the electrical limit is arranged on the explosion-proof electric walking trolley (1).
4. The explosion-proof type curved rail crane according to claim 1, wherein: the electric hoist body (3) comprises a winding drum device (31), a lifting reducer (32), an explosion-proof lifting motor (33), a steel wire rope (34) and a lifting hook (35); the winding drum device (31) comprises a winding drum (310) made of a DH36 marine high-strength plate, the winding drum (310) is rotatably arranged between the main body wall plates (30), and a spiral rope groove (311) is formed on the outer peripheral wall of the winding drum (310) along the axis of the winding drum; the lifting speed reducer (32) is fixed on the main body wall plate (30) on one side, and an output shaft of the lifting speed reducer (32) is connected with one end of the winding drum (310); the explosion-proof lifting motor (33) is fixed on the main body wall plate (30) on the other side, and the explosion-proof lifting motor (33) is connected with the other end of the winding drum (310); wire rope (34) winding is in on reel (310) in spiral grooving (311), the one end of wire rope (34) is fixed on reel (310), the other end of wire rope (34) is connected lifting hook (35), it adopts the motor from the area brake to play to rise explosion-proof machine (33).
5. The explosion-proof type curved rail crane according to claim 4, wherein: the LNG storage tank hoisting device is characterized in that the winding drum (310) is divided into a low-temperature rope area (a) and a normal-temperature rope area (b), spiral rope grooves (311) are formed in the low-temperature rope area (a) and the normal-temperature rope area (b) of the winding drum (310), steel wire ropes (34) wound in the low-temperature rope area (a) can adapt to low-temperature conditions in the LNG storage tank and are used for hoisting equipment inside the LNG storage tank, and steel wire ropes wound in the normal-temperature rope area (b) are used for hoisting equipment outside the LNG storage tank.
6. An explosion-proof type curved rail crane as set forth in claim 4 or 5, wherein: the electric hoist body (3) further comprises a rope pressing device (36) matched with the winding drum device (31), and the rope pressing device (36) comprises a winch wallboard (361), a connecting rod (362), a spring (363) and a pressing roller (364);
the winch wallboard (361) is distributed along the axial direction of the winding drum (310) and fixed on the front side of the main body wallboard (30), the compression roller (364) is pressed on the spiral rope groove (311) along the axial direction of the winding drum (310), the two connecting rods (362) are distributed on two sides of the compression roller (364), one end of each connecting rod (362) is connected with one end of the compression roller (364), and the other end of each connecting rod (362) is hinged on the winch wallboard (361) through a support; a spring (363) is connected to each connecting rod (362); one end of the spring (363) is fixed on the connecting rod (362), and the other end of the spring (363) is fixed on the winch wallboard (361).
7. The explosion-proof type curved rail crane according to claim 4, wherein: the electric hoist body (3) further comprises a rope arranging device (37) which is arranged below the winding drum device (31) in parallel and comprises a screw rod (371), a guide rod (372), a guide roller (373), a sliding block (374) and a driving mechanism;
the lead screw (371) is distributed below the reel device (31) and is rotatably connected between the main body wall boards (30), the guide rod (372) is parallel to the lead screw (371) and is fixed between the main body wall boards (30), the guide roller (373) is installed on the guide rod (372) in a matching way, the slide block (374) is in a threaded fit on the lead screw (371), the guide roller (373) is connected with the slide block (374), and the driving mechanism (375) is connected with the lead screw (371); the free end of the steel wire rope (34) bypasses the guide roller (373) to be vertically downwards connected with the hook (35), and the vertical pulling direction of the steel wire rope (34) is coincided with the center of the winding drum device (31).
8. The explosion-proof type curved rail crane according to claim 5, wherein: the installation limiting device comprises a first upper limiting device (7) and a first lower limiting device (8) which are distributed below the winding drum (310) and are arranged on the upstream side and the downstream side of the normal temperature rope area (b), and a second upper limiting device (9) which is distributed below the winding drum (310) and is arranged on the upstream side of the low temperature rope area (a); the first upper limit (7) of the normal-temperature rope area (b) and the second upper limit (9) of the low-temperature rope area (a) are used for limiting the winding of the steel wire rope by the winding drum (310) until the lifting hook (35) rises to a position about 1.5 meters away from the center of the winding drum (310), the first lower limit (8) of the normal-temperature rope area (b) is used for limiting 3-5 circles of steel wire rope left on the winding drum (310) after the steel wire rope is lowered from the winding drum (310), and a switch device (not shown in the figure) for controlling the switching of the first upper limit (7) in the normal-temperature rope area (b) and the second upper limit (9) in the low-temperature rope area (a) is arranged on the main body wall plate (30); the electric hoist body (3) is provided with an alarm which is matched with a first upper limit (7) and a first lower limit (8) in the normal temperature rope area (b) and a second upper limit (9) in the low temperature rope area (a).
9. The explosion-proof type curved rail crane according to claim 8, wherein: the first upper limit (7), the first lower limit (8) and the second upper limit (9) are mounted below the winding drum (310) through a mounting plate (100), two ends of the mounting plate (100) are fixed on the main body wall plate (30), the first upper limit (7), the first lower limit (8) and the second upper limit (9) are identical in structure and respectively comprise a limit seat (110), a rope pressing wheel arm (120), a rope pressing wheel shaft (130), a rope pressing wheel (140), a limit plate (150), a spring (160), a travel switch (170) and a collision block (180);
the limiting seat (110) is horizontally arranged on the mounting plate (100), and the two rope pressing wheel arms (120) are connected to the limiting seat (110) in a parallel rotating manner; the limiting plate (150) is horizontally arranged on the two rope pressing wheel arms (120); the spring (160) is vertically arranged between the limiting plate (150) and the limiting seat (110), so that the two rope pressing wheel arms (120) are arranged in an upward inclined mode relative to the limiting seat (110); the rope pressing wheel (140) is rotatably connected between two rope pressing wheel arms (120) through a rope pressing wheel shaft (130), the central axis of the rope pressing wheel (140) is coincident with the central axis of the winding drum (310), and the outer circumference of the rope pressing wheel (140) is in contact with the outer circumference of the winding drum (310); the travel switch (170) is fixedly arranged on the limiting seat (110) and is connected with a power circuit of the explosion-proof lifting motor (33); the collision block (180) is fixedly arranged on the limiting plate (140), and when a steel wire rope wound on the winding drum (310) is extruded with the outer peripheral wall of the rope pressing wheel (140), the collision block (180) moves downwards to trigger the control end on the stroke switch (170), so that the explosion-proof lifting motor (33) is powered off and stops running; the travel switches (170) of the first upper limit (7) and the second upper limit (9) are both normally closed travel switches, and the travel switch (170) of the first lower limit (8) is a normally open travel switch;
one side of pressing rope sheave (130) on first upper limit (7) and first lower limit (8) is the frustum structure, just one side orientation that is the frustum structure of pressing rope sheave (130) the downstream side of normal atmospheric temperature rope region (b), one side of pressing rope sheave (130) on the second upper limit (9) is the frustum structure, just one side orientation that is the frustum structure of pressing rope sheave (130) on the second upper limit (9) the downstream side of low temperature rope region (a).
10. The explosion-proof type curved rail crane according to claim 1, wherein: the anti-explosion electric walking trolley is characterized by further comprising a control system, wherein the control system comprises an anti-explosion control box and an anti-explosion control handle, the anti-explosion control box is installed on the main body wall plate (30), the anti-explosion control box is connected with a power supply through a flexible cable type power supply introducer, the anti-explosion control box is connected with electric devices on the anti-explosion electric walking trolley (1) and the electric hoist body (3) through cables, and the anti-explosion control handle is connected with the anti-explosion electric device control box through cables;
still include the measuring force device, the measuring force device is including installing two round pin shaft type sensor (6) of the interconnect's of main part wallboard (30) and connection support (28) fulcrum department for gather the load information of hoist in real time set up the load alarm on electric block body (3), round pin shaft type sensor (6) and load alarm all are connected with explosion-proof control box, explosion-proof control handle includes the control box, be provided with display screen and action control button on the control box, the display screen is used for showing the load value of hoist.
CN201911082111.0A 2019-11-07 2019-11-07 Explosion-proof type bent rail formula hoist Pending CN110723644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911082111.0A CN110723644A (en) 2019-11-07 2019-11-07 Explosion-proof type bent rail formula hoist

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911082111.0A CN110723644A (en) 2019-11-07 2019-11-07 Explosion-proof type bent rail formula hoist

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CN110723644A true CN110723644A (en) 2020-01-24

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Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113063615A (en) * 2021-03-22 2021-07-02 中海石油气电集团有限责任公司 Testing device and testing method for curved rail type crane
CN113979322A (en) * 2021-12-30 2022-01-28 河南科凯尼智能装备有限公司 Small crane convenient to erect quickly and using method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113063615A (en) * 2021-03-22 2021-07-02 中海石油气电集团有限责任公司 Testing device and testing method for curved rail type crane
CN113979322A (en) * 2021-12-30 2022-01-28 河南科凯尼智能装备有限公司 Small crane convenient to erect quickly and using method thereof

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