CN109941891B - Novel hoisting equipment with weighing sensing device and weighing method - Google Patents

Abstract

The invention discloses novel hoisting equipment with a weighing sensing device, which comprises a crane walking track, a bridge frame and a hoisting trolley, wherein the hoisting trolley comprises a split type frame and a lifting mechanism arranged on the split type frame; the rope guide is arranged on the winding drum through the winding drum threads, the upper end and the lower end of a pressing plate of the rope guide are both arranged in an outwards protruding mode, and a hoisting balance device is connected below the pressing plate of the rope guide through a hoisting balance device connecting plate. The invention can accurately acquire the weight of the lifted goods, has the advantage of keeping the goods stable in the lifting process, has simple structure and is convenient for low-cost transformation of the existing bridge crane.

Description

Novel hoisting equipment with weighing sensing device and weighing method

Technical Field

The invention relates to a hoisting device, in particular to a bridge crane with a weighing sensing device and a weighing method.

Background

At present, hoisting equipment is widely applied to various construction places, can vertically lift and horizontally carry heavy objects within a certain range, and greatly improves the working efficiency.

A bridge crane is a hoisting device which can be transversely erected above the working environments such as workshops, warehouses, material yards and the like and can hoist materials. The bridge crane mainly comprises crane walking rails, a bridge frame and a crane trolley, wherein the bridge frame comprises two groups of main beams and two groups of end beams which form a rectangle after being connected, the two groups of end beams are respectively arranged on the crane walking rails on two sides, and the bridge frame is driven by a crane driving device to run along the length direction of the crane walking rails; the cart driving device mainly comprises a cart driving motor, a transmission shaft, a speed reducer, wheels and a brake. The two groups of main beams are provided with hoisting trolleys, and the hoisting trolleys are driven by trolley driving devices to move along the length directions of the two groups of main beams; the trolley driving device mainly comprises a trolley driving motor, a transmission shaft, a speed reducer, wheels and a brake. The trolley comprises a frame and a lifting mechanism arranged on the frame, wherein the lifting mechanism mainly comprises a lifting motor, a speed reducer, a winding drum and a brake. The bridge crane can fully utilize the space below the bridge frame to hoist materials, is not hindered by ground equipment, is used as the most widely used hoisting equipment, and is applied to various working places, such as building engineering places, garbage transporting and hoisting places and the like.

The existing bridge crane needs to weigh and store the weight of goods hung under a lifting hook when the goods are transported, and particularly, the existing bridge crane is used in working occasions with certain weight precision requirements, such as garbage hanging and the like. For the above weighing requirements, most of the existing bridge cranes adopt a bearing pedestal type weighing sensor, that is, a weighing sensor is arranged in a bearing pedestal of a winding drum and used for recording the weight born by the winding drum, so as to calculate the weight of the goods lifted by the lifting hook. However, after the existing bearing seat type weighing sensor works for a long time, the mechanical characteristics of a strain gauge of the weighing sensor are changed due to long-term stress, so that the measuring result is not accurate enough, any auxiliary measuring scheme cannot be provided, and only production halt and replacement can be realized.

On the other hand, the existing hoisting equipment drives the steel wire rope wound on the winding drum to lift the goods through the lifting motor, and the steel wire rope has certain flexibility, so that the phenomena of swinging and the like can occur in the process of lifting the goods, and the phenomenon that the winding drum generates a certain degree of displacement to cause the weighing measurement result to be inaccurate. Meanwhile, the phenomena of shaking, swinging and the like in the process of lifting the goods can also generate great potential safety hazards to the lifted goods, such as the phenomena of impacting materials stacked on the ground or impacting a main beam of the bridge frame by a steel wire rope. Meanwhile, under the condition of conveying and hoisting garbage, the garbage in the grab bucket can be scattered, and the weight data initially measured by the weighing sensor and the actual hoisting weight data have great deviation.

Disclosure of Invention

The invention aims to provide novel hoisting equipment with a weighing sensing device and a weighing method, which can accurately acquire the weight of hoisted goods, have the advantage of keeping the goods stable in the hoisting process, have a simple structure and are convenient for low-cost transformation of the conventional bridge crane.

The invention adopts the following technical scheme:

a novel hoisting device with a weighing sensing device comprises a crane walking track, a bridge frame and a trolley, wherein the bridge frame comprises two groups of main beams and two groups of end beams, the two groups of end beams are respectively arranged on the crane walking tracks on two sides, and the bridge frame is driven by a trolley driving device to move along the length direction of the crane walking tracks; the two groups of main beams are provided with hoisting trolleys, the hoisting trolleys are driven by trolley driving devices to move along the length directions of the two groups of main beams, each hoisting trolley comprises a split type frame and a lifting mechanism arranged on the split type frame, each split type frame comprises an upper frame and a lower frame, each lower frame comprises two lower frame supporting beams arranged in parallel, a lower frame connecting plate is arranged between the two lower frame supporting beams, each upper frame comprises two upper frame supporting beams arranged in parallel, an upper frame connecting plate is arranged between the two upper frame supporting beams, and each upper frame connecting plate is provided with a lifting motor, a speed reducer, a winding drum and a brake; the upper frame connecting plate and the lower frame connecting plate below the winding drum are both correspondingly provided with steel wire rope through grooves, and the tail end of the steel wire rope wound on the winding drum is connected with a lifting hook system through a steel wire rope accommodating groove; the two upper frame supporting beams are correspondingly clamped at the upper parts of the two lower frame supporting beams, and four groups of same frame weighing sensors are distributed between the two upper frame supporting beams and the two lower frame supporting beams;

the winding drum is provided with a rope guider through a winding drum thread, the upper end and the lower end of a pressure plate of the rope guider are both arranged outwards in a protruding way, the lower part of the pressure plate of the rope guider is connected with a hoisted object balancing device through a hoisted object balancing device connecting plate, the hoisted object balancing device comprises a hoisted object front limiting block and a hoisted object rear limiting block which are arranged in parallel and symmetrically, the left side and the right side of the hoisted object front limiting block and the hoisted object rear limiting block are both connected through limiting block connecting plates, one side surface of the hoisted object front limiting block opposite to the hoisted object rear limiting block is symmetrically provided with a lifting hook system accommodating groove matched with the outline of the lifting hook system, when the winding drum drives the lifting hook system to move to an upper limit position, the lifting hook system is positioned in the lifting hook system accommodating groove and is limited horizontally by the lifting hook system accommodating groove, the upper, an upper limiting block supporting rod is horizontally arranged between the two lower frame supporting beams and is positioned in the first supporting limiting groove and is in sliding connection with the first supporting limiting groove.

The two groups of girders are all I-beams, the trolley driving device comprises a trolley driving motor, a transmission shaft, a speed reducer, trolley wheels and a brake, the trolley wheels are positioned on the upper end faces of the I-beams, the lower parts of the front side surfaces of the front limit blocks and the rear side surfaces of the rear limit blocks are all provided with a second supporting limit groove, a lower limit block supporting rod is horizontally arranged between the two groups of girders, two ends of the lower limit block supporting rod are all provided with lower limit block supporting rod idler wheels, the four lower limit block supporting rod idler wheels are correspondingly arranged on the upper end faces of the lower parts of the two groups of girders on the opposite sides, and the lower limit block supporting rod is positioned in the second supporting limit groove and is in sliding connection with.

The first supporting limiting groove and the second supporting limiting groove are internally provided with two groups of lifting limiting block idler wheels up and down through lifting limiting block idler wheel rotating shafts which are horizontally arranged, the upper limiting block supporting rod is connected with the first supporting limiting groove in a sliding mode through the corresponding two groups of lifting limiting block idler wheels, and the lower limiting block supporting rod is connected with the second supporting limiting groove in a sliding mode through the corresponding two groups of lifting limiting block idler wheels.

The lifting hook system comprises a movable pulley, the outer side of the movable pulley is connected with an upper opening of a U-shaped shell through a first pin shaft, an upper vertical part of the lifting hook penetrates through the lower part of the U-shaped shell, the lower part of the U-shaped shell is connected with an upper vertical part of the lifting hook through a second pin shaft, the lower part of the U-shaped shell is further sleeved inside a frustum-shaped limiting shell, the limiting shell is provided with a cylindrical U-shaped shell accommodating part along the axial direction, pin shaft accommodating parts are further axially arranged on two sides of the U-shaped shell accommodating part along the limiting shell, the pin shaft accommodating parts are communicated with the U-shaped shell accommodating part, the upper vertical part of the lifting hook penetrates through a hole in the center of the lower end face of the limiting shell, and the lower end face; the hook system accommodating grooves in the hoisting object front limiting block and the hoisting object rear limiting block are cambered grooves matched with the limiting shell in the frustum shape, and flexible buffer layers are further arranged on the surfaces of the cambered grooves.

When the lifting hook system moves upwards to the upper limit position, the rope guide device moves to the rightmost end along the axial direction of the winding drum and triggers the lifting limiter, at the moment, the limiting shell moves to the middle of the lifting hook system accommodating groove in the front limiting block of the lifted object and the rear limiting block of the lifted object, the outer surface of the limiting shell is in contact with the flexible buffer layer, and the horizontal height of the lower end of the limiting shell is higher than the horizontal heights of the front limiting block of the lifted object and the rear limiting block of the lifted object.

The lower parts of the lifting hook system accommodating grooves in the front lifting object limiting block and the rear lifting object limiting block are also uniformly provided with a plurality of groups of electric push rods, when the rope guide triggers the lifting limiting device, the electric push rods move outwards, and the maximum distance between the end parts of the plurality of groups of electric push rods is smaller than the diameter of the lower end face of the limiting shell.

A reel cover is arranged on the outer side of the reel, a rope guide rod is arranged on the outer surface of the upper part of the reel cover, a horizontal guide hole is formed in the upper end of a pressing plate of the rope guide, and the rope guide rod is positioned in the guide hole and is in sliding connection with the pressing plate of the rope guide; the outer side of the pressing plate of the rope guider is further provided with an arc-shaped steel wire rope reinforcing limiting plate, the lower surface of the steel wire rope reinforcing limiting plate is provided with a steel wire rope limiting groove matched with the diameter of the steel wire rope, and the setting direction of the steel wire rope limiting groove is matched with the direction of the steel wire rope entering the steel wire rope accommodating groove formed in the surface of the winding drum.

And the second pin shaft is connected with the U-shaped shell through a bearing type weighing sensor.

The up end of two lower frame supporting beam all is provided with upper carriage supporting beam storage tank, and both ends all are provided with the locating hole around the upper carriage supporting beam storage tank that two lower frame supporting beam up end set up, two upper carriage supporting beam's shape and upper carriage supporting beam storage tank phase-match, and both ends all are provided with locating hole assorted reference column around two upper carriage supporting beam lower extreme, two upper carriage supporting beam's lower extreme sets up respectively in two upper carriage supporting beam storage tanks, and the reference column that two upper carriage supporting beam lower extreme set up is located the locating hole that corresponds respectively, all be provided with frame weighing sensor between the bottom surface of every locating hole and the lower terminal surface of reference column.

The weighing method of the novel hoisting equipment with the weighing sensing device sequentially comprises the following steps of:

a: taking down the lifting hook system, and respectively acquiring AD values output by the four frame weighing sensors by using a controller and recording the AD values as Zad1, Zad2, Zad3 and Zad 4; then measuring the total weight Wd of the hook system by using an external weighing device;

b: installing a lifting hook system on a steel wire rope of a winding drum, controlling a lifting motor to work, driving the steel wire rope through the winding drum to enable the lifting hook system arranged at the lower end of the steel wire rope to move upwards and separate from the ground, and then respectively collecting AD values output by four frame weighing sensors by using a controller and recording the AD values as Cad1, Cad2, Cad3 and Cad 4;

c: connecting the goods to be hoisted with a lifting hook system through a lifting hook;

d: controlling a lifting motor to work, and driving a steel wire rope and a lifting hook system arranged at the lower end of the steel wire rope to move upwards through a winding drum, so as to lift the goods to be lifted;

e: when the goods to be lifted leave the ground, the lifting motor is continuously controlled to work, when the lifting hook system moves upwards to the upper limit position, the rope guide axially moves to the rightmost end along the winding drum and triggers the lifting limiter, the lifting limiter controls the lifting motor to stop working, the brake limits the winding drum to be in a static state, the limiting shell moves to the middle of a lifting hook system accommodating groove in the lifting object front limiting block and the lifting object rear limiting block, and the outer surface of the limiting shell is in contact with the flexible buffer layer;

then respectively acquiring AD values output by the bearing type weighing sensor and the four frame weighing sensors through the controller, wherein the AD value output by the bearing type weighing sensor is A0, and the AD values output by the four frame weighing sensors are respectively recorded as A1, A1, A3 and A4; the nominal load-bearing weight values of the sensors are sequentially C0, C1, C2, C3 and C4 according to factory information of the bearing type weighing sensors and the four frame weighing sensors, the excitation voltage and the sensitivity of the bearing type weighing sensors are respectively E0 and S0, the excitation voltage and the sensitivity of the four same frame weighing sensors are respectively E1 and S1, and then the controller calculates the weight W0 of the goods to be hoisted obtained by the bearing type weighing sensors and the weight of the goods to be hoisted obtained by the four frame weighing sensors according to the following formulas;

W0=（C0 * A0）/（B0 * E0 * S0）；

for the weight of the goods to be lifted obtained by the four frame weighing sensors, two calculation formulas are adopted to respectively calculate the weight of the goods to be lifted under the initial frame weighing sensor state and the re-inspection frame weighing sensor state;

the weight W11 of the goods to be lifted under the initial frame weighing sensor state is:

W11=（C1 + C2 + C3 + C4）*（A1 + A2 + A3 + A4）/（B1 * E1 * S1）；

b0 is an AD value corresponding to each mV of an AD conversion chip selected in the acquisition circuit of the bearing type weighing sensor; b1 is the AD value corresponding to each mV of the AD conversion chip selected in the acquisition circuit of the frame weighing sensor;

the weight W12 of the goods to be lifted under the condition of the retest frame weighing sensor is as follows:

W12=［（A1 + A2 + A3 + A4）-（Zad1+ Zad2+ Zad3+ Zad4）］/ K；

wherein, K is the standard rate,

K=［（Cad1+ Cad2+ Cad3+ Cad4）-（Zad1+ Zad2+ Zad3+ Zad4）］/ Wd；

and F, judging whether (W12-W11)/W12 is smaller than or equal to α or not, wherein the error rate is α = 5%, if the error rate is larger than α, outputting the final weight of the goods to be lifted to be [ (W0 + W11+ W12)/3 ] -W0, returning to the step A when the goods to be lifted are transported next time, and if the error rate is smaller than α, outputting the final weight of the goods to be lifted to be W12-W0, and returning to the step C when the goods to be lifted are transported next time.

According to the invention, accurate weight information can be more accurately acquired by changing the setting position and the setting structure of the sensor; the invention can keep the goods stable in the lifting process, and collects weight information in a static state to further improve the data accuracy; the invention has simple structure and low manufacturing cost, and is more convenient for low-cost transformation on the basis of the existing bridge crane; the invention realizes the synchronous motion of the hoisting balance device and the steel wire rope, realizes the left-right motion along with the rope guider and the front-back motion along with the lower frame, and does not hinder the normal operation of the hoisting trolley and the bridge frame; the rope guide is further reinforced and fixed, so that the service life of the rope guide is effectively prolonged; the invention can also prevent the goods from falling to a certain extent, and reduce the potential safety hazard; the invention can also be provided with weighing alternative equipment to ensure the normal use of the product; the invention also specially designs the shapes of the hook system accommodating groove and the limiting shell, so that the limiting shell can smoothly enter the hook system accommodating groove, and can be well guided by the frustum-shaped hook system accommodating groove formed by the two cambered grooves, when the limiting shell is lifted to a specified position, an effective gap can be kept between the limiting shell and the inner wall of the hook system accommodating groove, the gap is filled by the flexible buffer layer, the limiting shell and the hook system accommodating groove can not be in rigid collision, the friction force can be effectively increased, the tightest limiting effect can be achieved, the hook system is prevented from shaking along with goods to be lifted, the potential safety hazard is avoided, and the weighing precision is improved.

Drawings

FIG. 1 is a schematic structural view of an upper frame according to the present invention;

FIG. 2 is a schematic structural view of the lower frame of the present invention;

FIG. 3 is a schematic view of the construction of the crane trolley and the bridge of the present invention;

FIG. 4 is a schematic view of the connection structure of the hoisted object balancing device and the rope guider of the present invention;

FIG. 5 is a schematic structural view of a front limiting block for lifting objects in the present invention;

FIG. 6 is a schematic view of the hook system of the present invention;

FIG. 7 is a schematic structural view of a spacing housing according to the present invention;

FIG. 8 is a schematic view of the connection structure of the crane running rail, the bridge and the trolley.

Detailed Description

The invention is described in detail below with reference to the following figures and examples:

as shown in fig. 1 to 8, the novel hoisting equipment with the weighing sensing device of the invention comprises a crane walking track 1, a bridge frame 2 and a trolley 3, wherein the bridge frame 2 comprises two groups of main beams 4 and two groups of end beams 5, the two groups of end beams 5 are respectively arranged on the crane walking tracks 1 on two sides, the bridge frame 2 is driven by a cart driving device to run along the length direction of the crane walking tracks 1, and the cart driving device mainly comprises a cart driving motor 6, a transmission shaft, a speed reducer 16, wheels 8 and a brake. The two groups of main beams 4 are provided with hoisting trolleys 3, the hoisting trolleys 3 are driven by trolley driving devices to move along the length direction of the two groups of main beams 4, and the trolley driving devices mainly comprise trolley driving motors 7, transmission shafts, speed reducers 16, wheels 8 and brakes.

In the invention, the trolley 3 comprises a split type frame and a lifting mechanism arranged on the split type frame, the split type frame comprises an upper frame 9 and a lower frame 10, the lower frame 10 comprises two lower frame supporting beams 11 arranged in parallel, a lower frame connecting plate 12 is arranged between the two lower frame supporting beams 11, the upper frame 9 comprises two upper frame supporting beams 13 arranged in parallel, an upper frame connecting plate 14 is arranged between the two upper frame supporting beams 13, and the upper frame connecting plate 14 is provided with a lifting motor 15, a speed reducer 16, a winding drum 18 and a brake 17; the upper frame connecting plate 14 and the lower frame connecting plate 12 below the winding drum 18 are both correspondingly provided with steel wire rope passing grooves 19, and the tail end of the steel wire rope wound on the winding drum 18 is connected with a lifting hook system through a steel wire rope accommodating groove; the two upper frame supporting beams 13 are correspondingly clamped at the upper parts of the two lower frame supporting beams 11, and four groups of same frame weighing sensors 20 are distributed between the two upper frame supporting beams 13 and the two lower frame supporting beams 11.

In this embodiment, the upper end surfaces of the two lower frame supporting beams 11 are provided with upper frame supporting beam accommodating grooves 21, the front and rear ends of the upper frame supporting beam accommodating grooves 21 provided on the upper end surfaces of the two lower frame supporting beams 11 are provided with positioning holes 22, the shapes of the two upper frame supporting beams 13 are matched with the upper frame supporting beam accommodating grooves 21, the front and rear ends of the lower end surfaces of the two upper frame supporting beams 13 are provided with positioning pillars 23 matched with the positioning holes 22, the lower ends of the two upper frame supporting beams 13 are respectively provided in the two upper frame supporting beam accommodating grooves 21, the positioning pillars 23 provided on the lower end surfaces of the two upper frame supporting beams 13 are respectively located in the corresponding positioning holes 22, and a frame weighing sensor 20 is provided between the bottom surface of each positioning hole 22 and the lower end surface of the positioning pillars 23.

The accommodating, positioning holes 22 and positioning columns 23 of the upper frame supporting beam 13 are matched, so that the stable connection between the upper frame 9 and the lower frame 10 can be ensured, and meanwhile, the mass borne by the goods can be accurately collected by four groups of same frame weighing sensors 20 when the goods to be lifted are lifted, and the accuracy of weight collection is further enhanced. Meanwhile, due to the design of the split type frame, the labor intensity of the frame weighing sensor 20 during installation and replacement is greatly reduced, the existing bridge crane is convenient to modify and upgrade, and the high-precision weighing result is obtained at low cost.

In order to keep the goods stable in the lifting process and accurately obtain the weight of the lifted goods, the invention also specially designs a lifting object balancing device 24. The winding drum 18 is provided with a rope guider 25 through the winding drum 18 thread, the upper end and the lower end of a pressure plate 25-1 of the rope guider 25 are both arranged outwards in a protruding way, the lower part of the pressure plate 25-1 of the rope guider 25 is connected with a hoisted object balancing device 24 through a hoisted object balancing device connecting plate 26, the hoisted object balancing device 24 comprises a hoisted object front limiting block 24-1 and a hoisted object rear limiting block 24-2 which are arranged in parallel and symmetrically, the left side and the right side of the hoisted object front limiting block 24-1 and the hoisted object rear limiting block 24-2 are both connected through a limiting block connecting plate 27, a hook system accommodating groove 28 matched with the outline of the hook system is symmetrically arranged on one side surface opposite to the hoisted object front limiting block 24-1 and the hoisted object rear limiting block 24-2, when the winding drum 18 drives the hook system to move to the upper limit position, the hook system is positioned in, the upper parts of the front side surface of the front limit block 24-1 of the lifted object and the rear side surface of the rear limit block 24-2 of the lifted object are both provided with a first support limit groove 29, an upper limit block support rod 30 is horizontally arranged between the two lower frame support beams 11, and the upper limit block support rod 30 is positioned in the first support limit groove 29 and is in sliding connection with the first support limit groove 29.

In this embodiment, in order to ensure stable support of the lifted object balancing device 24, the two groups of main beams 4 are all i-beams, the trolley driving device includes a trolley driving motor 7, a transmission shaft, a speed reducer 16, trolley wheels 8 and a brake, the trolley wheels 8 are located on the upper end face of the i-beams, the lower portions of the front side surface of the front limit block 24-1 and the rear side surface of the rear limit block 24-2 of the lifted object are both provided with a second support limit groove 31, a lower limit block support rod 32 is horizontally arranged between the two groups of main beams 4, both ends of the lower limit block support rod 32 are both provided with lower limit block support rod rollers 33, the four lower limit block support rod rollers 33 are correspondingly arranged on the upper end face of the lower portion of the opposite side of the two groups of main beams 4, and the lower limit block support rod 32 is located in the second support limit groove. Two groups of lifting object limiting block idler wheels 34 are arranged in the first supporting limiting groove 29 and the second supporting limiting groove 31 up and down through the rotating shafts of the lifting object limiting block idler wheels 34 which are horizontally arranged, the upper limiting block supporting rod 30 is in sliding connection with the first supporting limiting groove 29 through the corresponding two groups of lifting object limiting block idler wheels 34, and the lower limiting block supporting rod 32 is in sliding connection with the second supporting limiting groove 31 through the corresponding two groups of lifting object limiting block idler wheels 34.

The design of four groups of limiting block supporting rods in the front, the back, the upper and the lower parts enables the lifted object balancing device 24 to be stably supported, and provides good support guarantee for the follow-up anti-falling function. Meanwhile, because the steel wire rope is wound at one end of the roller and moves along the axial direction of the roller along with the rope guide 25 in the lifting process, the special design can not only ensure that the hook system is accurately positioned in the hook system accommodating groove 28 of the hoisted object balancing device after being lifted, but also ensure that the hoisted object balancing device 24 cannot obstruct the movement of the steel wire rope in the normal lifting and hoisting process, and can also ensure that the hoisted object balancing device 24 synchronously runs along with the trolley 3, moves left and right along with the rope guide 25, moves back and forth along with the lower frame 10, and does not obstruct the normal running of the trolley 3 and the bridge frame 2.

In this embodiment, the hook system includes a movable pulley 35, the outer side of the movable pulley 35 is connected with the upper opening of the U-shaped housing 37 through a first pin shaft 36, the upper vertical portion of the hook 39 passes through the lower portion of the U-shaped housing 37, the lower portion of the U-shaped housing 37 is connected with the upper vertical portion of the hook 39 through a second pin shaft 38, the lower portion of the U-shaped housing 37 is further sleeved inside a frustum-shaped limiting housing 40, the limiting housing 40 is axially provided with a cylindrical U-shaped housing accommodating portion 41, pin shaft accommodating portions 42 are further axially provided on both sides of the U-shaped housing accommodating portion 41 along the limiting housing 40, the pin shaft accommodating portions 42 are communicated with the U-shaped housing accommodating portion 41, the upper vertical portion of the hook 39, which is provided at the center of the lower end face of the limiting housing 40, passes through a hole 43, and the lower end face of; the hook system accommodating grooves 28 in the front limit block 24-1 and the rear limit block 24-2 are cambered grooves matched with the limiting shell 40 in the frustum shape, and flexible buffer layers are further arranged on the surfaces of the cambered grooves. Such as rubber.

When the hook system moves upwards to the upper limit position, the rope guide 25 moves axially to the rightmost end along the winding drum 18 and triggers the lifting limiter (the prior art, which is not described herein), at this time, the limiting shell 40 moves to the middle of the hook system accommodating groove 28 in the front limit block 24-1 and the rear limit block 24-2 of the lifted object, the outer surface of the limiting shell 40 is in contact with the flexible buffer layer, and the horizontal height of the lower end of the limiting shell 40 is higher than the horizontal heights of the front limit block 24-1 and the rear limit block 24-2 of the lifted object.

In the invention, the hook system accommodating groove 28 adopts the matching design of the cambered grooves and the frustum-shaped limiting shell 40, so that the limiting shell 40 can smoothly enter the hook system accommodating groove 28, and the frustum-shaped hook system accommodating groove 28 formed by the two cambered grooves can be utilized to well guide the limiting shell 40, when the limiting shell 40 rises to a specified position, an effective gap can be kept between the limiting shell 40 and the inner wall of the hook system accommodating groove 28, meanwhile, the gap can be filled by a flexible buffer layer, so that the limiting shell 40 and the hook system accommodating groove 28 cannot generate rigid collision, the friction force can be effectively increased, the tightest limiting effect is achieved, the hook system is prevented from shaking along with goods to be lifted, the potential safety hazard is avoided, and the weighing precision is improved. The special structural design of the limiting shell 40 can ensure that the existing hook 39 is smoothly implanted into the limiting shell 40, and can effectively inhibit the rotation of the hook 39 and the U-shaped shell 37 in the horizontal direction after entering the hook system accommodating groove 28.

In consideration of further avoiding potential safety hazards and avoiding the phenomenon that goods fall down at high altitude, a plurality of groups of electric push rods 44 are uniformly arranged at the lower parts of the hook system accommodating grooves 28 in the front limiting block 24-1 and the rear limiting block 24-2 of the lifted object, when the rope guide 25 triggers the lifting limiting device, the electric push rods 44 are controlled by the controller to move outwards, and the maximum distance between the end parts of the plurality of groups of electric push rods 44 is smaller than the diameter of the lower end face of the limiting shell 40. So that even if the wire rope is broken and falls off, the spacing housing 40 can be prevented from being separated from the hook system accommodating groove 28 by the spacing housing 40 and the electric push rod 44. Meanwhile, the main beam 4 and the lower frame 10 are used for dispersing the downward pressure. When the rope guider 25 leaves and is separated from the contact with the lifting limiter, the controller controls the electric push rod 44 to contract inwards, and the downward movement of the hook system is not prevented.

Because the rope guider 25 can not rotate, when the winding drum 18 rotates, the thread groove drives the rope guider 25 to move along the axial direction of the winding drum 18, the wound steel wire rope is accurately led into and out of the spiral groove of the winding drum 18, and the steel wire rope is discharged from the gap of the rope guider 25. Considering that the rope guide 25 is subjected to a large lateral force during operation, and therefore is prone to breaking, on one hand, the rope guide 25 needs to be reinforced, and on the other hand, considering smooth movement of the rope guide 25, in the present embodiment, a reel cover is disposed outside the reel 18, a rope guide rod 45 is disposed on an upper outer surface of the reel cover, a horizontal guide hole 46 is disposed at an upper end of a pressing plate 25-1 (for connecting a plurality of rope guide nuts, which are conventional in the art) of the rope guide 25, and the rope guide rod 45 is located inside the guide hole 46 and is slidably connected with the pressing plate 25-1 of the rope guide 25; the upper part of the rope guide 25 is position-limited by the rope guide rod 45, so that the moving direction of the rope guide 25 can be ensured, and a certain reinforcing effect can be achieved.

Meanwhile, an arc-shaped steel wire rope reinforcing and limiting plate 47 is further arranged on the outer side of the pressing plate 25-1 of the rope guider 25, a steel wire rope limiting groove matched with the diameter of the steel wire rope is formed in the lower surface of the steel wire rope reinforcing and limiting plate 47, and the arrangement direction of the steel wire rope limiting groove is matched with the direction of the steel wire rope entering the steel wire rope accommodating groove formed in the surface of the winding drum 18. The device is used for finishing the posture of the steel wire rope before the steel wire rope enters the strip groove of the rope guider 25, the direction of the steel wire rope is similar to that of the steel wire rope accommodating groove arranged on the surface of the winding drum 18 as much as possible, and the lateral stress of the rope guider 25 during working is reduced. So as to ensure the service life of the rope guider 25 and form the high-efficiency linkage of the hoisted object balancing device 24.

To prevent sudden failure of the four frame load cells 20, the second pin 38 is connected to the U-shaped housing 37 by a bearing-type load cell 48 which, as an alternative and as a reference,

the weighing method of the novel hoisting equipment with the weighing sensing device sequentially comprises the following steps of:

a: taking down the lifting hook system, and respectively acquiring AD values output by the four frame weighing sensors 20 by using a controller and recording the AD values as Zad1, Zad2, Zad3 and Zad 4; then, measuring the total weight Wd of the hook system by using external weighing equipment such as a floor scale, an electronic scale and the like;

in the invention, the signal output ends of the frame weighing sensor 20 and the bearing type weighing sensor 48 are connected with the AD conversion module, which is a conventional connection and acquisition mode of the sensors and is not described herein again.

B: installing a lifting hook system on a steel wire rope of a winding drum 18, then controlling a lifting motor 15 to work, driving the steel wire rope through the winding drum 18 to enable the lifting hook system arranged at the lower end of the steel wire rope to move upwards and separate from the ground, and then respectively collecting AD values output by four frame weighing sensors 20 by using a controller and recording the AD values as Cad1, Cad2, Cad3 and Cad 4;

c: the goods to be lifted are connected with a lifting hook system through a lifting hook 39;

d: controlling a lifting motor 15 to work, and driving a steel wire rope and a lifting hook system arranged at the lower end of the steel wire rope to move upwards through a winding drum 18, so as to lift the goods to be lifted;

e: when the goods to be lifted leave the ground, the lifting motor 15 is continuously controlled to work, when the lifting hook system moves upwards to the upper limit position, the rope guider 25 axially moves to the rightmost end along the winding drum 18 and triggers the lifting limiter, the lifting limiter controls the lifting motor 15 to stop working, the winding drum 18 is limited by the brake to be in a static state, at the moment, the limiting shell 40 moves to the middle of the lifting hook system accommodating groove 28 in the hoisting object front limiting block 24-1 and the hoisting object rear limiting block 24-2, and the outer surface of the limiting shell 40 is in contact with the flexible buffer layer;

then, respectively acquiring AD values output by the bearing type weighing sensors 48 and the four frame weighing sensors 20 through a controller, setting the AD value output by the bearing type weighing sensors 48 as A0, and respectively recording the AD values output by the four frame weighing sensors 20 as A1, A1, A3 and A4; the nominal bearing weight values of the sensors are sequentially C0, C1, C2, C3 and C4 according to factory information of the bearing type weighing sensors 48 and the four frame weighing sensors 20, the excitation voltage and the sensitivity of the bearing type weighing sensors 48 are respectively E0 and S0, the excitation voltage and the sensitivity of the four identical frame weighing sensors 20 are respectively E1 and S1, and then the controller calculates the weight W0 of the goods to be hoisted obtained by the bearing type weighing sensors 48 and the weight of the goods to be hoisted obtained by the four frame weighing sensors 20 according to the following formulas;

W0=（C0 * A0）/（B0 * E0 * S0）；

for the weight of the goods to be lifted obtained by the four frame weighing sensors 20, two calculation formulas are adopted to respectively calculate the weight of the goods to be lifted under the state of an initial frame weighing sensor 20 and the state of a retest frame weighing sensor 20; the initial frame weighing sensor 20 state is the sensor factory debugging data, and the retest frame weighing sensor 20 state is the data according to the present rechecking.

The weight W11 of the goods to be lifted in the initial frame weighing sensor 20 state is:

W11=（C1 + C2 + C3 + C4）*（A1 + A2 + A3 + A4）/（B1 * E1 * S1）；

wherein, B0 is the AD value corresponding to each mV of the AD conversion chip selected in the acquisition circuit of the bearing type weighing sensor 48; b1 is the AD value corresponding to each mV of the AD conversion chip selected in the acquisition circuit of the frame weighing sensor 20;

the weight W12 of the goods to be lifted under the condition of the retest frame weighing sensor 20 is as follows:

W12=［（A1 + A2 + A3 + A4）-（Zad1+ Zad2+ Zad3+ Zad4）］/ K；

wherein, K is the standard rate,

K=［（Cad1+ Cad2+ Cad3+ Cad4）-（Zad1+ Zad2+ Zad3+ Zad4）］/ Wd；

and F, judging whether the (W12-W11)/W12 is less than or equal to α or not, wherein the error rate is α = 5%, calculating the α value according to the actual mass after the goods are lifted last time and the display mass of the weighing sensor, and also automatically setting according to actual experience, if the error rate is more than α, outputting the final weight of the goods to be lifted to be [ (W0 + W11+ W12)/3 ] -W0, returning to the step A when the goods to be lifted are transported next time, and if the error rate is less than or equal to α, outputting the final weight of the goods to be lifted to be W12-W0, and directly entering the step C when the goods to be lifted are transported next time.

Claims (10)

1. A hoisting device with a weighing sensing device comprises a crane walking track, a bridge frame and a crane trolley, wherein the bridge frame comprises two groups of main beams and two groups of end beams, the two groups of end beams are respectively arranged on the crane walking tracks on two sides, and the bridge frame is driven by a trolley driving device to run along the length direction of the crane walking tracks; be provided with the trolley on two sets of girders, the trolley is driven by dolly drive arrangement and is followed the length direction motion of two sets of girders, its characterized in that: the trolley comprises a split type frame and a lifting mechanism arranged on the split type frame, wherein the split type frame comprises an upper frame and a lower frame, the lower frame comprises two lower frame supporting beams arranged in parallel, a lower frame connecting plate is arranged between the two lower frame supporting beams, the upper frame comprises two upper frame supporting beams arranged in parallel, an upper frame connecting plate is arranged between the two upper frame supporting beams, and a lifting motor, a speed reducer, a winding drum and a brake are arranged on the upper frame connecting plate; the upper frame connecting plate and the lower frame connecting plate below the winding drum are both correspondingly provided with steel wire rope through grooves, and the tail end of the steel wire rope wound on the winding drum is connected with a lifting hook system through a steel wire rope accommodating groove; the two upper frame supporting beams are correspondingly clamped at the upper parts of the two lower frame supporting beams, and four groups of same frame weighing sensors are distributed between the two upper frame supporting beams and the two lower frame supporting beams;

the winding drum is provided with a rope guide through threads, the upper end and the lower end of a pressure plate of the rope guide are both arranged in an outward protruding manner, the lower part of the pressure plate of the rope guide is connected with a hoisted object balancing device through a hoisted object balancing device connecting plate, the hoisted object balancing device comprises a hoisted object front limiting block and a hoisted object rear limiting block which are symmetrically arranged in parallel, the left side and the right side of the hoisted object front limiting block and the hoisted object rear limiting block are both connected through limiting block connecting plates, one side surface of the hoisted object front limiting block opposite to the hoisted object rear limiting block is symmetrically provided with a lifting hook system accommodating groove matched with the outline of the lifting hook system, when the winding drum drives the lifting hook system to move to an upper limit position, the lifting hook system is positioned in the lifting hook system accommodating groove and is limited horizontally by the lifting hook system accommodating groove, the upper parts of the, an upper limiting block supporting rod is horizontally arranged between the two lower frame supporting beams and is positioned in the first supporting limiting groove and is in sliding connection with the first supporting limiting groove.

2. Lifting device provided with a weighing sensor device according to claim 1, characterized in that: the two groups of girders are all I-beams, the trolley driving device comprises a trolley driving motor, a transmission shaft, a speed reducer, trolley wheels and a brake, the trolley wheels are positioned on the upper end faces of the I-beams, the lower parts of the front side surfaces of the front limit blocks and the rear side surfaces of the rear limit blocks are all provided with a second supporting limit groove, a lower limit block supporting rod is horizontally arranged between the two groups of girders, two ends of the lower limit block supporting rod are all provided with lower limit block supporting rod idler wheels, the four lower limit block supporting rod idler wheels are correspondingly arranged on the upper end faces of the lower parts of the two groups of girders on the opposite sides, and the lower limit block supporting rod is positioned in the second supporting limit groove and is in sliding connection with.

3. Lifting device provided with a weighing sensor device according to claim 2, characterized in that: the first supporting limiting groove and the second supporting limiting groove are internally provided with two groups of lifting limiting block idler wheels up and down through lifting limiting block idler wheel rotating shafts which are horizontally arranged, the upper limiting block supporting rod is connected with the first supporting limiting groove in a sliding mode through the corresponding two groups of lifting limiting block idler wheels, and the lower limiting block supporting rod is connected with the second supporting limiting groove in a sliding mode through the corresponding two groups of lifting limiting block idler wheels.

4. Lifting apparatus provided with a load sensing device according to claim 3, wherein: the lifting hook system comprises a movable pulley, the outer side of the movable pulley is connected with an upper opening of a U-shaped shell through a first pin shaft, an upper vertical part of the lifting hook penetrates through the lower part of the U-shaped shell, the lower part of the U-shaped shell is connected with an upper vertical part of the lifting hook through a second pin shaft, the lower part of the U-shaped shell is further sleeved inside a frustum-shaped limiting shell, the limiting shell is provided with a cylindrical U-shaped shell accommodating part along the axial direction, pin shaft accommodating parts are further axially arranged on two sides of the U-shaped shell accommodating part along the limiting shell, the pin shaft accommodating parts are communicated with the U-shaped shell accommodating part, the upper vertical part of the lifting hook penetrates through a hole in the center of the lower end face of the limiting shell, and the lower end face; the hook system accommodating grooves in the hoisting object front limiting block and the hoisting object rear limiting block are cambered grooves matched with the limiting shell in the frustum shape, and flexible buffer layers are further arranged on the surfaces of the cambered grooves.

5. Lifting apparatus provided with a load sensing device according to claim 4, wherein: when the lifting hook system moves upwards to the upper limit position, the rope guide device moves to the rightmost end along the axial direction of the winding drum and triggers the lifting limiter, at the moment, the limiting shell moves to the middle of the lifting hook system accommodating groove in the front limiting block of the lifted object and the rear limiting block of the lifted object, the outer surface of the limiting shell is in contact with the flexible buffer layer, and the horizontal height of the lower end of the limiting shell is higher than the horizontal heights of the front limiting block of the lifted object and the rear limiting block of the lifted object.

6. Lifting device provided with a weighing sensor device according to claim 5, characterized in that: the lower parts of the lifting hook system accommodating grooves in the front lifting object limiting block and the rear lifting object limiting block are also uniformly provided with a plurality of groups of electric push rods, when the rope guide triggers the lifting limiting device, the electric push rods move outwards, and the maximum distance between the end parts of the plurality of groups of electric push rods is smaller than the diameter of the lower end face of the limiting shell.

7. Lifting device provided with a weighing sensor device according to claim 6, characterized in that: a reel cover is arranged on the outer side of the reel, a rope guide rod is arranged on the outer surface of the upper part of the reel cover, a horizontal guide hole is formed in the upper end of a pressing plate of the rope guide, and the rope guide rod is positioned in the guide hole and is in sliding connection with the pressing plate of the rope guide; the outer side of the pressing plate of the rope guider is further provided with an arc-shaped steel wire rope reinforcing limiting plate, the lower surface of the steel wire rope reinforcing limiting plate forms a steel wire rope limiting groove matched with the diameter of the steel wire rope, and the setting direction of the steel wire rope limiting groove is matched with the direction of a steel wire rope accommodating groove formed in the surface of a winding drum, which is used for accommodating the steel wire rope.

8. Lifting device provided with a weighing sensor device according to claim 7, characterized in that: and the second pin shaft is connected with the U-shaped shell through a bearing type weighing sensor.

9. Lifting device provided with a weighing sensor device according to claim 8, characterized in that: the up end of two lower frame supporting beam all is provided with upper carriage supporting beam storage tank, and both ends all are provided with the locating hole around the upper carriage supporting beam storage tank that two lower frame supporting beam up end set up, two upper carriage supporting beam's shape and upper carriage supporting beam storage tank phase-match, and both ends all are provided with locating hole assorted reference column around two upper carriage supporting beam lower extreme, two upper carriage supporting beam's lower extreme sets up respectively in two upper carriage supporting beam storage tanks, and the reference column that two upper carriage supporting beam lower extreme set up is located the locating hole that corresponds respectively, all be provided with frame weighing sensor between the bottom surface of every locating hole and the lower terminal surface of reference column.

10. The method for weighing a lifting device provided with a weight sensing device according to claim 9, comprising the following steps in sequence:

a: taking down the lifting hook system, and respectively acquiring AD values output by the four frame weighing sensors by using a controller and recording the AD values as Zad1, Zad2, Zad3 and Zad 4; then measuring the total weight Wd of the hook system by using an external weighing device;

b: installing a lifting hook system on a steel wire rope of a winding drum, controlling a lifting motor to work, driving the steel wire rope through the winding drum to enable the lifting hook system arranged at the lower end of the steel wire rope to move upwards and separate from the ground, and then respectively collecting AD values output by four frame weighing sensors by using a controller and recording the AD values as Cad1, Cad2, Cad3 and Cad 4;

c: connecting the goods to be hoisted with a lifting hook system through a lifting hook;

d: controlling a lifting motor to work, and driving a steel wire rope and a lifting hook system arranged at the lower end of the steel wire rope to move upwards through a winding drum, so as to lift the goods to be lifted;

e: when the goods to be lifted leave the ground, the lifting motor is continuously controlled to work, when the lifting hook system moves upwards to the upper limit position, the rope guide axially moves to the rightmost end along the winding drum and triggers the lifting limiter, the lifting limiter controls the lifting motor to stop working, the brake limits the winding drum to be in a static state, the limiting shell moves to the middle of a lifting hook system accommodating groove in the lifting object front limiting block and the lifting object rear limiting block, and the outer surface of the limiting shell is in contact with the flexible buffer layer;

then respectively acquiring AD values output by the bearing type weighing sensor and the four frame weighing sensors through the controller, wherein the AD value output by the bearing type weighing sensor is A0, and the AD values output by the four frame weighing sensors are respectively recorded as A1, A1, A3 and A4; the nominal load-bearing weight values of the sensors are sequentially C0, C1, C2, C3 and C4 according to factory information of the bearing type weighing sensors and the four frame weighing sensors, the excitation voltage and the sensitivity of the bearing type weighing sensors are respectively E0 and S0, the excitation voltage and the sensitivity of the four same frame weighing sensors are respectively E1 and S1, and then the controller calculates the weight W0 of the goods to be hoisted obtained by the bearing type weighing sensors and the weight of the goods to be hoisted obtained by the four frame weighing sensors according to the following formulas;

W0=（C0 * A0）/（B0 * E0 * S0）；

for the weight of the goods to be lifted obtained by the four frame weighing sensors, two calculation formulas are adopted to respectively calculate the weight of the goods to be lifted under the initial frame weighing sensor state and the re-inspection frame weighing sensor state;

the weight W11 of the goods to be lifted under the initial frame weighing sensor state is:

W11=（C1 + C2 + C3 + C4）*（A1 + A2 + A3 + A4）/（B1 * E1 * S1）；

b0 is an AD value corresponding to each mV of an AD conversion chip selected in the acquisition circuit of the bearing type weighing sensor; b1 is the AD value corresponding to each mV of the AD conversion chip selected in the acquisition circuit of the frame weighing sensor;

the weight W12 of the goods to be lifted under the condition of the retest frame weighing sensor is as follows:

W12=［（A1 + A2 + A3 + A4）-（Zad1+ Zad2+ Zad3+ Zad4）］/ K；

wherein, K is the standard rate,

K=［（Cad1+ Cad2+ Cad3+ Cad4）-（Zad1+ Zad2+ Zad3+ Zad4）］/ Wd；

and F, judging whether (W12-W11)/W12 is smaller than or equal to α or not, wherein the error rate is α = 5%, if the error rate is larger than α, outputting the final weight of the goods to be lifted to be [ (W0 + W11+ W12)/3 ] -W0, returning to the step A when the goods to be lifted are transported next time, and if the error rate is smaller than α, outputting the final weight of the goods to be lifted to be W12-W0, and returning to the step C when the goods to be lifted are transported next time.

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