CN109879181B - Automatic multiplying power conversion device of movable arm tower crane and application method thereof - Google Patents
Automatic multiplying power conversion device of movable arm tower crane and application method thereof Download PDFInfo
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- CN109879181B CN109879181B CN201910187614.8A CN201910187614A CN109879181B CN 109879181 B CN109879181 B CN 109879181B CN 201910187614 A CN201910187614 A CN 201910187614A CN 109879181 B CN109879181 B CN 109879181B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 74
- 239000010959 steel Substances 0.000 claims abstract description 74
- 230000003014 reinforcing effect Effects 0.000 claims description 37
- 238000001514 detection method Methods 0.000 claims description 21
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/043—Block and tackle system with variable number of cable parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
- B66C23/90—Devices for indicating or limiting lifting moment
- B66C23/905—Devices for indicating or limiting lifting moment electrical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The automatic multiplying power conversion device of the movable arm tower crane comprises a two-multiplying power lifting hook, a four-multiplying power pulley block, a conversion system, an arm end section and a lifting steel wire rope, wherein the conversion system is hinged below the arm end section, the four-multiplying power pulley block is hung on a grapple of the conversion system in a four-multiplying power state, the four-multiplying power pulley block is fixed above the two-multiplying power lifting hook in the two-multiplying power state, one end of the lifting steel wire rope is fixed on the lifting mechanism, the other end of the lifting steel wire rope penetrates through the arm end section and an inner plate of the conversion system on one side, then penetrates through a first pulley on the two-multiplying power lifting hook and a second pulley on the four-multiplying power pulley block, then penetrates through an inner plate of the conversion system on the other side, and finally is fixed on a steel wire rope wedge sleeve; the invention further comprises a using method of the automatic multiplying power conversion device of the movable arm tower crane. The invention can complete automatic multiplying power conversion by only operating the driver in the cab and matching the electric and structural members, thereby realizing conversion between two/four times of multiplying power, and has simple and light structure and convenient operation.
Description
Technical Field
The invention relates to an automatic multiplying power change conversion method and device for a movable arm tower crane, and belongs to the field of tower cranes.
Background
The tower crane needs to realize conversion between multiplying powers by different positioning of pulley blocks in the lifting hook component in operation, for example, conversion from two multiplying powers to four multiplying powers and conversion from four multiplying powers to two multiplying powers. At present, three conditions exist in the multiplying power conversion of the movable arm tower crane, namely, a balance weight is removed or added at the position of the movable arm end in an overhead operation mode, a pin shaft between two pulley blocks is removed on the ground, the multiplying power conversion is realized by means of self weight, and the multiplying power conversion is realized by means of the cooperation of lifting of a lifting hook and a grab beam. The first disadvantage is that the work at the high-risk work at the arm end is high-risk work, and each conversion requires a person to the arm end, so that the rate conversion efficiency is low and the work is unsafe. The second disadvantage is that manual assistance on the ground is required to achieve the conversion of the quadruple rate to the double rate, but the conversion of the double rate to the quadruple rate also requires manual work to work at the high altitude of the arm end. The third kind can trade multiplying power automatically, but the shortcoming is that upper pulley group is overweight, makes lifting hook group focus higher, and rising hanging hook is inclined easily, and arm end structure arranges difficultly, and weight is heavy to lead to its lifting performance to reduce, and unstable or the interference phenomenon appears in the function sometimes, thereby increases the fault rate, and the security also can not be ensured simultaneously.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an automatic multiplying power conversion device of a swing arm tower crane and a using method thereof.
The invention can complete automatic multiplying power conversion by only operating the driver in the cab and matching the electric and structural members, thereby realizing conversion between two/four times of multiplying power, and has simple and light structure and convenient operation.
The technical scheme adopted for solving the technical problems is as follows:
the automatic multiplying power conversion device of the movable arm tower crane comprises a two-multiplying power lifting hook 1, a four-multiplying power pulley block 2, a conversion system 5, an arm end section 4 and a lifting steel wire rope 6, wherein the conversion system 5 is hinged below the arm end section 4, the four-multiplying power pulley block 2 is hung on a grapple 3 of the conversion system 5 in a four-multiplying power state, the four-multiplying power pulley block 2 is fixed above the two-multiplying power lifting hook 1 in the two-multiplying power state, one end of the lifting steel wire rope 6 is fixed on a lifting mechanism, the other end of the lifting steel wire rope passes through the arm end section 4 and an inner plate 525 of the conversion system 5 on one side, passes through a first pulley 13 on the two-multiplying power lifting hook 1 and a second pulley 26 on the four-multiplying power pulley block 2, passes through an inner plate 525 of the conversion system 5 on the other side, and is finally fixed on a steel wire rope wedge sleeve;
the two-multiplying-power lifting hook 1 comprises an upper frame 11, a two-multiplying-power lifting hook frame 12 and a first pulley 13, wherein the first pulley 13 is hinged in the two-multiplying-power lifting hook frame 12, the lower end of the upper frame 11 is fixed on the hinge of the two-multiplying-power lifting hook frame 12, the upper frame 11 comprises a guide plate 113 for guiding a quadruple-rate pulley block 2, a stop lever 120 for closing a grapple hook 3, a first folding plate 112, a pressing plate 115, a supporting plate 116, a connecting plate 117, a first reinforcing plate 118, two second folding plates 119, a first inclined plate 121, a first lug plate 114 hinged with the two-multiplying-power lifting hook frame 12 and a seat plate 111, a plurality of square holes are formed in the middle of the seat plate 111, an arc notch is formed in the middle of the outer side of the seat plate 111, the guide plate 113 is fixedly connected to two sides of the middle of the seat plate 111, and is used for guiding the quadruple-rate pulley block 2, the first folded plates 112 are fixedly connected to two sides of two outer square holes of the seat plate 111, four supporting plates 116 are fixedly connected to the first folded plates 112, the circular arc holes of the first folded plates 112 and the supporting plates 116 are coaxially arranged, the circular arc holes of the first folded plates 112 and the supporting plates 116 of the stop lever 120 are used for closing the grapple 3 when the four-time rate is converted into two multiplying power, the pressing plates 115 are fixedly connected to the first folded plates 112, the supporting plates 116 and the stop lever 120, the first lug plates 114 are fixedly connected to two sides below the seat plate 111, the second folded plates 119 are fixedly connected to the middle below the seat plate 111, the inclined positions are inwards, the first reinforcing plates 118 are fixedly connected to two ends of the two second folded plates 119, the connecting plates 117 are fixedly connected to two ends of the first reinforcing plates 118, and the first inclined plates 121 are fixedly connected along inclined positions of the two second folded plates 119, and one ends of the first inclined plates 118 are fixedly connected with the first reinforcing plates 118;
the quadruple pulley block 2 comprises a limiting frame 24 for triggering the second limiter LPDR, a limiting plate 25 for triggering the detection limiter LPSD, a guide opening 23, a second pulley 26, a push rod 22 for pushing the grapple 3 or being hooked by the grapple 3, two side plates 21, a first connecting plate 27, a second reinforcing plate 28 for fixedly connecting the limiting frame 24 and a second connecting plate 29, wherein the second pulley 26 is hinged between the two side plates 21, the upper left corner and the upper right corner of the side plate 21 are respectively provided with a hole for fixedly connecting the push rod 22, the two ends of the push rod 22 penetrate through the holes of the side plates 21 and are fixedly connected to the side plates 21, the guide opening 23 is fixedly connected between the two sides of the two side plates 21, the limiting plate 25 is distributed on the two sides of the guide opening 23 and is fixedly connected to one side plate 21, the limiting frame 24 is fixedly connected to the side plate 21 positioned on the side of the limiting plate 25, the first connecting plate 27 is fixedly connected to the upper inner side of the side plate 21, the second connecting plate 29 is fixedly connected to the outer side of the second reinforcing plate 28 and the side plate 21, the second reinforcing plate 28 is fixedly connected to the other end of the second reinforcing plate 28 and the second connecting plate 29 is fixedly connected to the second reinforcing plate 24;
the conversion system 5 comprises a grapple 3 for fixing the four-multiplying-power pulley block 2 after converting the two multiplying powers, two detection limiters LPSD for detecting the position of the four-multiplying-power pulley block 2 during the multiplying power conversion, a first limiter LPSR for converting the four multiplying powers into the two multiplying powers, a second limiter LPDR for converting the two multiplying powers into the four multiplying powers, two LPGs for detecting the working of the grapple 3 and a conversion frame 51, wherein the detection limiters LPSD, the second limiter LPDR, the first limiter LPSR and the conversion limiter LPG are fixedly arranged on the conversion frame 51;
the conversion frame 51 comprises two guide rods 511, a first bottom plate 514 for installing a first limiter LPSR and a second limiter LPDR, a third bottom plate 515 for installing a hook replacement limiter LPG, two second bottom plates 516 for installing a detection limiter LPSD, a third ear plate 517 for fixing the grapple 3, a second ear plate 513 for hinging an arm end section 4, a third connecting plate 519, a third reinforcing plate 518, a rectangular pipe 520, a short square pipe 521, a first channel steel 512 and a second channel steel 522, two ends of the short square pipe 521 are fixedly connected with the first channel steel 512 and the second channel steel 522 respectively, one end side of the rectangular pipe 520 is fixedly connected with two ends of the first channel steel 512 and the second channel steel 522, the other end side of the rectangular pipe 520 is fixedly connected with the second ear plate 513, one end of the guide rod 511 passes through round holes 519 of the two third connecting plates and is fixedly connected, one end of the two third connecting plates 519 is fixedly connected with the outer middle sides of the first channel steel 512 and the second channel steel 522, the third reinforcing plate 518 is fixedly connected to two sides of the third connecting plate 519 and is fixedly connected to the first channel steel 512 and the second channel steel 522, the third lug plates 517 are fixedly connected to the first channel steel 512 and the second channel steel 522, two groups of the third lug plates are arranged, the third bottom plate 515 is fixedly connected to the short square tube 521, the second bottom plate 516 is fixedly connected to the lower portion of the first channel steel 512, the first bottom plate 514 is fixedly connected to the outer side of the guide rod 511 on the side of the first channel steel 512, two ends of the conversion frame 51 further comprise an inner plate 525, a fourth connecting plate 526, a sealing plate 527, a fourth reinforcing plate 528, a fifth connecting plate 529 and a guard plate 56, the sealing plate 527 is fixedly connected to two ends of the rectangular tube 520, one end of the fourth connecting plate 526 and one end of the fifth connecting plate 529 are fixedly connected to the lower portion of the sealing plate 527, the other end of the fourth connecting plate 526 and the other end of the fifth connecting plate 529 are fixedly connected to the inner plate 525, and the four ends of the fourth reinforcing plate 528 are fixedly connected to the sealing plate 527, respectively, the four connecting plates 526, the fifth connecting plate 529 and the inner plate 525, wherein a notch is formed in the inner plate 525, and the guard plate 56 is hinged to the inner plate 525 after the lifting steel wire rope is worn, so that the lifting steel wire rope is prevented from contacting the inner plate 525 and escaping;
the grapple 3 comprises a hook 31 for fixing a push rod on the quadruple pulley block 2, a flitch 35 for fixing a second inclined plate 55, round steel 32 for fixing on a third lug plate 517 of a conversion frame 51, a sixth connecting plate 33 and a shaft 34 for fixing a connecting rod 52, wherein the hook 31 is provided with a hole and fixedly connected, the round steel 32 penetrates through the hole of the hook 31, the two ends of the round steel 32 extend out to be equal, the sixth connecting plate 33 is provided with two holes, one hole is fixedly connected on the round steel 32, the other hole is fixedly connected with the shaft 34, the flitch 35 is fixedly connected on two sides of the hook 31, two threaded holes are formed in the flitch 35, and the grapple 3 is provided with two holes and fixedly connected on the third lug plate 517 on the conversion frame 51.
Preferably, the conversion system 5 further includes a connecting rod 52, a spring 53, a lock turnbuckle 54, and a second inclined plate 55, where two ends of the lock turnbuckle 54 are respectively hinged to the spring 53, the other end of the spring 53 is hinged to the connecting rod 52, the other end of the connecting rod 52 is fixed to the shaft 34, two groups of second inclined plates 55 are fixed to the attaching plates 35 of the grappling hooks 3, two second inclined plates 55 are arranged on each grappling hook 3, and when the four-fold rate is converted to two-fold rate, the second inclined plates 55 can collide with the stop lever 120 on the two-fold rate lifting hook 1, so that the grappling hooks 3 return to the original positions.
Preferably, the control panel in the cab is distributed with a quadruple rate indicator lamp B, a double-rate indicator lamp A, a rate change switch I, a red indicator lamp E converted by the grapple 3 and the like, wherein the rate change switch I is divided into a double-rate to quadruple rate position C and a four-rate to double-rate position D.
The invention also discloses a use method of the automatic multiplying power conversion device of the movable arm tower crane, which comprises the following steps: automatic conversion of two multiplying powers of the movable arm tower crane into four multiplying powers, and automatic conversion of four multiplying powers of the movable arm tower crane into two multiplying powers;
the automatic magnification conversion method for converting the two magnifications of the movable arm tower crane into four magnifications comprises the following steps of:
(S1) before converting the two multiplying powers into four multiplying powers, the multiplying power converting switch I needs to be turned to a four multiplying power position C on a control panel in the cab.
(S2) operating the two-rate hook 1 to rise so that the guide rod 511 of the conversion system 5 is inserted into the guide opening 23 of the quadruple pulley block 2, during which the quadruple pulley block 2 will come into contact with the detection limiter LPSD switch of the conversion system 5, indicating that the conversion system 5 and the quadruple pulley block 2 are combined.
And (S3) the two-multiplying-power lifting hook 1 continues to ascend, so that the push rod 22 on the four-multiplying-power pulley block 2 pushes the grapple 3, the hook replacement limiter LPG stops working, and at the moment, the red indicator lamp E on the control panel in the cab is lightened.
(S4) the two-multiplying-power lifting hook 1 continues to ascend until the push rod 22 on the four-multiplying-power pulley block 2 exceeds the grapple 3, the grapple 3 returns to be the original state, the hook replacement limiter LPG works, and then the red indicator lamp E on the control panel in the cab is turned off.
(S5) the two-multiplying-power lifting hook 1 continues to ascend until the second limiter LPDR works, at the moment, the two-multiplying-power lifting hook 1 cannot continue to ascend, meanwhile, the two-multiplying-power indicator lamp A on the control panel in the cab is turned off, the four-multiplying-power indicator lamp B is turned on, and the operation mode of the tower crane works in the four-multiplying-power state.
(6) The two-multiplying-power lifting hook 1 is operated to descend, when the four-multiplying-power pulley block 2 is fixed by the grapple 3, the two-multiplying-power lifting hook 1 descends in the four-multiplying-power mode, and the multiplying power conversion is converted into four multiplying powers.
The automatic magnification conversion method for converting the four-fold rate of the movable arm tower crane into two-fold rate comprises the following steps of:
(T1) before the four-time rate conversion of the two multiplying powers, the multiplying power conversion switch I needs to be turned to the two multiplying power position D on the control panel in the cab.
And (T2) operating the two-multiplying-power lifting hook 1 to ascend so that the two-multiplying-power lifting hook 1 collides with the four-multiplying-power pulley block 2.
(T3) the two-multiplying power lifting hook 1 continues to ascend, the push rod 22 of the four-multiplying power pulley block 2 pushes the grapple 3, the hook replacement limiter LPG stops working, and then the red indicator lamp E on the control panel in the cab is lightened.
(T4) the double rate lifting hook 1 continues to rise until the push rod 22 on the quadruple rate pulley block 2 pushes the grapple hook 3 open, at which time the first limiter LPSR works, at which time the double rate lifting hook 1 cannot continue to rise.
(T5) operating the two-rate hook 1 to descend, and at this time, the four-rate pulley block 2 will descend together with the two-rate hook 1.
And (T6) in the descending process, the stop lever 120 acting on the grapple 3 is arranged on the two-rate lifting hook 1, so that the grapple 3 can be closed, the hook replacement limiter LPG works after the grapple 3 is closed, and then the red indicator lamp E on the control panel in the cab is turned off.
(T7) continuing to descend until the detection limiter LPSD separates from the quadruple pulley block 2, indicating that the quadruple pulley block 2 is below the detection limiter LPSD. At this time, the quadruple rate indicator lamp B on the control panel in the cab is turned off, the two-multiplying rate indicator lamp A is turned on, and the operation mode of the tower crane works in the two-multiplying rate state.
The beneficial effects of the invention are mainly shown in the following steps: and the limit and multiplying power conversion debugging is finished before leaving the factory, so that the field installation and debugging are convenient. The conversion between multiplying powers does not need auxiliary personnel to assist, and can be completed by only operating a driver in a cab to cooperate with a structural member, so that the conversion between two/four times of multiplying powers is realized, the implementation effect is good, the operability is strong, the multiplying power conversion efficiency is improved, the working efficiency of the tower crane is improved, and unsafe factors of high-altitude operation are effectively reduced.
Drawings
Fig. 1 is a schematic diagram of a conventional magnification conversion.
FIG. 2 is a schematic diagram of the present invention in an automatic magnification conversion two-magnification state.
FIG. 3 is a schematic diagram of the four-to-two-magnification in the present invention.
FIG. 4 is a schematic diagram of a two-to-four-fold ratio in the present invention.
Fig. 5 is a cab control panel distribution diagram in the present invention.
FIG. 6 is a schematic view of a two-rate hook according to the present invention.
FIG. 7 is a block diagram of a two-rate hook upper frame according to the present invention.
FIG. 8 is a schematic diagram of a quadruple pulley block according to the present invention.
Fig. 9 is a schematic diagram of the conversion system assembly of the present invention.
Fig. 10 is a block diagram of a conversion frame of the conversion system of the present invention.
Fig. 11 is a view showing the structure of the grapple of the conversion system of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
Referring to fig. 2 and 6-11, an automatic multiplying power conversion device of a swing arm tower crane comprises a two-multiplying power lifting hook 1, a four-multiplying power pulley block 2, a conversion system 5, an arm end section 4 and a lifting steel wire rope 6, wherein the conversion system 5 is hinged below the arm end section 4, the four-multiplying power pulley block 2 is hung on a grapple 3 of the conversion system 5 in a four-multiplying power state, the four-multiplying power pulley block 2 is fixed above the two-multiplying power lifting hook 1 in the two-multiplying power state, one end of the lifting steel wire rope 6 is fixed on the lifting mechanism, and the other end of the lifting steel wire rope passes through the arm end section 4 and an inner plate 525 of the conversion system 5 on one side, passes through a first pulley 13 on the two-multiplying power lifting hook 1 and a second pulley 26 on the four-multiplying power pulley block 2, passes through an inner plate 525 of the conversion system 5 on the other side, and is finally fixed on a steel wire rope wedge sleeve;
the double-multiplying-power lifting hook 1 comprises an upper frame 11, a double-multiplying-power lifting hook frame 12 and a first pulley 13, wherein the first pulley 13 is hinged in the double-multiplying-power lifting hook frame 12, the lower end of the upper frame 11 is fixed on the double-multiplying-power lifting hook frame 12, the upper frame 11 comprises a guide plate 113 for guiding a quadruple-rate pulley block 2, a stop lever 120 for closing a grapple 3, a first folding plate 112, a pressing plate 115, a supporting plate 116, a connecting plate 117, a first reinforcing plate 118, two second folding plates 119, a first inclined plate 121, a first lug plate 114 hinged with the double-multiplying-power lifting hook frame 12 and a base plate 111, a plurality of square holes are formed in the middle of the base plate 111, an arc notch is formed in the middle of the outer side of the base plate 111, the guide plate 113 is fixedly connected to two sides of the middle of the base plate 111 for guiding the quadruple-rate pulley block 2, the first folding plate 112 is fixedly connected to two sides of the two outer holes of the base plate 111, the four supporting plates 116 are fixedly connected to the first folded plate 112, the circular arc holes of the first folded plate 112 and the supporting plates 116 are coaxially arranged, the stop lever 120 is fixedly connected to the circular arc holes of the first folded plate 112 and the supporting plates 116, the effect is that the grapple 3 can be closed when the four-time rate is converted into two-time rate, the pressing plate 115 is fixedly connected to the first folded plate 112, the supporting plates 116 and the stop lever 120, the first ear plate 114 is fixedly connected to two sides below the seat plate 111, the second folded plate 119 is fixedly connected to the middle below the seat plate 111, the inclined position is inward, the first reinforcing plate 118 is fixedly connected to two ends of the two second folded plates 119, the connecting plates 117 are fixedly connected to two ends of the first reinforcing plate 118, and the first inclined plate 121 is fixedly connected to the first reinforcing plate 118 along the inclined position of the two second folded plates 119;
the quadruple pulley block 2 comprises a limiting frame 24 for triggering two multiplying powers to four multiplying powers, a limiting plate 25 for triggering a detection limiter, a guide opening 23, a second pulley 26, a push rod 22 for pushing the grapple 3 or being hooked by the grapple 3, two side plates 21, a first connecting plate 27, a second reinforcing plate 28 for fixedly connecting the limiting frame 24 and a second connecting plate 29, wherein the second pulley 26 is hinged between the two side plates 21, a hole is respectively arranged at the left and right upper corners of the side plates 21 and is used for fixedly connecting the push rod 22, two ends of the push rod 22 penetrate through the holes of the side plates 21 and are fixedly connected to the side plates 21, the guide opening 23 is fixedly connected to the middle of the outer two sides of the two side plates 21, the limiting plate 25 is distributed on the two sides of the guide opening 23 and is fixedly connected to one side plate 21, the limiting frame 24 is fixedly connected to the side plate 21 positioned on the side of the limiting plate 25, the first connecting plate 27 is fixedly connected to the upper inner side of the side plate 21, the second connecting plate 29 is fixedly connected to the second reinforcing plate 28 and the outer side of the side plate 21, the second reinforcing plate 28 is fixedly connected to the other end of the second reinforcing plate 28 and the second connecting plate 29 is fixedly connected to the limiting frame 24;
the conversion system 5 comprises a grapple 3 for fixing the four-multiplying-power pulley block 2 after converting the two multiplying powers, two detection limiters LPSD for detecting the position of the four-multiplying-power pulley block 2 during converting the multiplying powers, a first limiter LPSR for converting the four multiplying powers into the two multiplying powers, a second limiter LPDR for converting the two multiplying powers into the four multiplying powers, two hook-changing limiters LPG for detecting the operation of the grapple 3 and a conversion frame 51, wherein the detection limiters LPSD, the second limiters LPDR, the first limiters LPSR and the hook-changing limiters LPG are fixedly arranged on the conversion frame 51;
the conversion frame 51 comprises two guide rods 511, a first bottom plate 514 for installing a first limiter LPSR and a second limiter LPDR, a third bottom plate 515 for installing a hook replacement limiter LPG, two second bottom plates 516 for installing a detection limiter LPSD, a third ear plate 517 for fixing the grapple 3, a second ear plate 513 for hinging an arm end section 4, a third connecting plate 519, a third reinforcing plate 518, a rectangular pipe 520, a short square pipe 521, a first channel steel 512 and a second channel steel 522, two ends of the short square pipe 521 are fixedly connected with the first channel steel 512 and the second channel steel 522 respectively, one end side of the rectangular pipe 520 is fixedly connected with two ends of the first channel steel 512 and the second channel steel 522, the other end side of the rectangular pipe 520 is fixedly connected with the second ear plate 513, one end of the guide rod 511 passes through round holes 519 of the two third connecting plates and is fixedly connected, one end of the two third connecting plates 519 is fixedly connected with the outer middle sides of the first channel steel 512 and the second channel steel 522, the third reinforcing plate 518 is fixedly connected to two sides of the third connecting plate 519 and is fixedly connected to the first channel steel 512 and the second channel steel 522, the third lug plates 517 are fixedly connected to the first channel steel 512 and the second channel steel 522, two groups of the third lug plates are arranged, the third bottom plate 515 is fixedly connected to the short square tube 521, the second bottom plate 516 is fixedly connected to the lower portion of the first channel steel 512, the first bottom plate 514 is fixedly connected to the outer side of the guide rod 511 on the side of the first channel steel 512, two ends of the conversion frame 51 further comprise an inner plate 525, a fourth connecting plate 526, a sealing plate 527, a fourth reinforcing plate 528, a fifth connecting plate 529 and a guard plate 56, the sealing plate 527 is fixedly connected to two ends of the rectangular tube 520, one end of the fourth connecting plate 526 and one end of the fifth connecting plate 529 are fixedly connected to the lower portion of the sealing plate 527, the other end of the fourth connecting plate 526 and the other end of the fifth connecting plate 529 are fixedly connected to the inner plate 525, and the four ends of the fourth reinforcing plate 528 are fixedly connected to the sealing plate 527, respectively, the four connecting plates 526, the fifth connecting plate 529 and the inner plate 525, wherein a notch is formed in the inner plate 525, and the guard plate 56 is fixed on the inner plate 525 after the lifting steel wire rope is worn, so that the lifting steel wire rope is prevented from contacting the inner plate 525 and escaping;
the grapple 3 comprises a hook 31 for fixing a push rod on the quadruple pulley block 2, a flitch 35 for fixing a second inclined plate 55, round steel 32 for fixing on a third lug plate 517 of the conversion frame 51, a sixth connecting plate 33 and a shaft 34 for fixing a connecting rod 52, wherein the hook 31 is provided with a hole, the round steel 32 penetrates through the hole of the hook 31 and is fixedly connected, the two ends of the round steel 32 extend out to be equal, the sixth connecting plate 33 is provided with two holes, one hole is fixedly connected on the round steel 32, the other hole is fixedly connected with the shaft 34, the flitch 35 is fixedly connected on two sides of the hook 31, two threaded holes are formed in the flitch 35, and the grapple 3 is fixedly connected on the third lug plate 517 on the conversion frame 51;
the conversion system 5 further comprises a connecting rod 52, a spring 53, a lock turnbuckle 54 and a second inclined plate 55, wherein two ends of the lock turnbuckle 54 are respectively hinged with the spring 53, the other end of the spring 53 is hinged with the connecting rod 52, the other end of the connecting rod 52 is fixed with the shaft 34, two groups of the second inclined plates 55 are respectively fixed on the flitch 35 of the grapple 3, two second inclined plates 55 are arranged on each grapple 3, and when the four-fold rate is converted into two-fold rate, the second inclined plates 55 can collide with the stop lever 120 on the two-fold rate lifting hook 1, so that the grapple 3 returns to the original position.
The control panel in the cab is provided with a quadruple rate indicator lamp B, a double-rate indicator lamp A, a rate change switch I, a grapple 3 for changing a red indicator lamp E and the like, wherein the rate change switch I is divided into a double-rate change position C and a four-rate change position D.
Example 2
Referring to fig. 3 to 5, the present embodiment relates to a method for using an automatic magnification conversion device of a boom tower crane according to embodiment 1, including: automatic conversion of two multiplying powers of the movable arm tower crane into four multiplying powers, and automatic conversion of four multiplying powers of the movable arm tower crane into two multiplying powers;
the automatic magnification conversion method for converting the two magnifications of the movable arm tower crane into four magnifications comprises the following steps of:
(S1) before converting the two multiplying powers into four multiplying powers, the multiplying power converting switch I needs to be turned to a four multiplying power position C on a control panel in the cab.
(S2) operating the two-rate hook 1 to rise so that the guide rod 511 of the conversion system 5 is inserted into the guide opening 23 of the quadruple pulley block 2, during which the quadruple pulley block 2 will come into contact with the detection limiter LPSD switch of the conversion system 5, indicating that the conversion system 5 and the quadruple pulley block 2 are combined.
And (S3) the two-multiplying-power lifting hook 1 continues to ascend, so that the push rod 22 on the four-multiplying-power pulley block 2 pushes the grapple 3, the hook replacement limiter LPG stops working, and at the moment, the red indicator lamp E on the control panel in the cab is lightened.
(S4) the two-multiplying-power lifting hook 1 continues to ascend until the push rod 22 on the four-multiplying-power pulley block 2 exceeds the grapple 3, the grapple 3 returns to be the original state, the hook replacement limiter LPG works, and then the red indicator lamp E on the control panel in the cab is turned off.
(S5) the two-multiplying-power lifting hook 1 continues to ascend until the second limiter LPDR works, at the moment, the two-multiplying-power lifting hook 1 cannot continue to ascend, meanwhile, the two-multiplying-power indicator lamp A on the control panel in the cab is turned off, the four-multiplying-power indicator lamp B is turned on, and the operation mode of the tower crane works in the four-multiplying-power state.
(S6) operating the two-multiplying-power lifting hook 1 to descend, when the four-multiplying-power pulley block 2 is fixed by the grapple 3, the two-multiplying-power lifting hook 1 descends in the four-multiplying-power mode, and the multiplying power conversion is converted into four multiplying powers.
The automatic magnification conversion method for converting the four-fold rate of the movable arm tower crane into two-fold rate comprises the following steps of:
(T1) before the four-time rate conversion of the two multiplying powers, the multiplying power conversion switch I needs to be turned to the two multiplying power position D on the control panel in the cab.
And (T2) operating the two-multiplying-power lifting hook 1 to ascend so that the two-multiplying-power lifting hook 1 collides with the four-multiplying-power pulley block 2.
(T3) the two-multiplying power lifting hook 1 continues to ascend, the push rod 22 of the four-multiplying power pulley block 2 pushes the grapple 3, the hook replacement limiter LPG stops working, and then the red indicator lamp E on the control panel in the cab is lightened.
(T4) the double rate lifting hook 1 continues to rise until the push rod 22 on the quadruple rate pulley block 2 pushes the grapple hook 3 open, at which time the first limiter LPSR works, at which time the double rate lifting hook 1 cannot continue to rise.
(T5) operating the two-rate hook 1 to descend, and at this time, the four-rate pulley block 2 will descend together with the two-rate hook 1.
And (T6) in the descending process, the stop lever 120 acting on the grapple 3 is arranged on the two-rate lifting hook 1, so that the grapple 3 can be closed, the hook replacement limiter LPG works after the grapple 3 is closed, and then the red indicator lamp E on the control panel in the cab is turned off.
(T7) continuing to descend until the detection limiter LPSD separates from the quadruple pulley block 2, indicating that the quadruple pulley block 2 is below the detection limiter LPSD. At this time, the quadruple rate indicator lamp B on the control panel in the cab is turned off, the two-multiplying rate indicator lamp A is turned on, and the operation mode of the tower crane works in the two-multiplying rate state.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, but also equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.
Claims (3)
1. Automatic multiplying power conversion device that trades of swing arm tower machine, its characterized in that: the four-times lifting hook comprises a two-times lifting hook (1), a four-times lifting pulley block (2), a conversion system (5), an arm end section (4) and a lifting steel wire rope (6), wherein the conversion system (5) is hinged below the arm end section (4), the four-times lifting pulley block (2) is hung on a grabbing hook (3) of the conversion system (5) in a four-times state, the four-times lifting pulley block (2) is fixed above the two-times lifting hook (1) in a two-times state, one end of the lifting steel wire rope (6) is fixed on the lifting mechanism, the other end of the lifting steel wire rope passes through the arm end section (4) and an inner plate (525) of the conversion system (5) on one side, passes through a first pulley (13) on the two-times lifting hook (1) and a second pulley (26) on the conversion system (5) on the other side, and finally is fixed on a four-times steel wire rope wedge sleeve;
the two-multiplying-power lifting hook (1) comprises an upper frame (11), a two-multiplying-power lifting hook frame (12) and a first pulley (13), wherein the first pulley (13) is hinged in the two-multiplying-power lifting hook frame (12), the lower end of the upper frame (11) is fixed on the two-multiplying-power lifting hook frame (12), the upper frame (11) comprises a guide plate (113) for guiding a four-multiplying-power pulley block (2), a stop lever (120) for closing a grapple hook (3), a first folding plate (112), a pressing plate (115), a supporting plate (116), a connecting plate (117), a first reinforcing plate (118), two second folding plates (119), a first inclined plate (121), a first lug plate (114) hinged with the two-multiplying-power lifting hook frame (12) and a base plate (111), a plurality of square holes are formed in the middle of the base plate (111), circular arc gaps are formed in the middle of the outer side of the base plate (111), the guide plate (113) is fixedly connected to two sides of the middle of the base plate (111), and the four-multiplying-power pulley block (2) is guided; the first folded plate (112) is fixedly connected to two sides of two outer square holes of the seat plate (111), four supporting plates (116) are fixedly connected to the first folded plate (112), and the first folded plate (112) and the circular arc holes of the supporting plates (116) are coaxially arranged; the stop lever (120) is fixedly connected to the arc holes of the first folding plate (112) and the supporting plate (116), and the grapple (3) is closed when the quadruple rate is converted into the double-multiplying power; the pressing plates (115) are fixedly connected to the first folding plates (112), the supporting plates (116) and the stop rods (120), the first lug plates (114) are fixedly connected to two sides below the seat plates (111), the second folding plates (119) are fixedly connected to the middle below the seat plates (111), the inclined positions are inward, the first reinforcing plates (118) are fixedly connected to two ends of the two second folding plates (119), the connecting plates (117) are fixedly connected to two ends of the first reinforcing plates (118), the first inclined plates (121) are fixedly connected along the inclined positions of the two second folding plates (119), and one ends of the first inclined plates are fixedly connected with the first reinforcing plates (118);
the quadruple pulley block (2) comprises a limiting frame (24) for triggering a second Limiter (LPDR), a limiting plate (25) for triggering a detection Limiter (LPSD), a guide opening (23), a second pulley (26), a push rod (22) for pushing a grapple (3) or being hooked by the grapple (3), two side plates (21), a first connecting plate (27), a second reinforcing plate (28) for fixedly connecting the limiting frame (24) and a second connecting plate (29); the second pulley (26) is hinged between two side plates (21), a hole is formed in each of the left and right upper corners of each side plate (21), and two ends of the push rod (22) penetrate through the holes of the side plates (21) and are fixedly connected to the side plates (21); the guide opening (23) is fixedly connected between the outer sides of the two side plates (21), two limiting plates (25) are distributed on the two sides of the guide opening (23) and fixedly connected to one side plate (21), the limiting frame (24) is fixedly connected to the side plate (21) positioned on the side of the limiting plate (25), the first connecting plate (27) is fixedly connected to the upper inner side of the side plate (21), the second connecting plate (29) is fixedly connected to the second reinforcing plate (28) and the outer side of the side plate (21), one end of the second reinforcing plate (28) is fixedly connected with the second connecting plate (29), and the other end of the second reinforcing plate is fixedly connected with the limiting frame (24);
the conversion system (5) comprises a grapple (3) for fixing a four-multiplying-power pulley block (2) after converting two multiplying powers into four multiplying powers, two detection Limiters (LPSD) for detecting the positions of the four-multiplying-power pulley block (2) during multiplying power conversion, one first Limiter (LPSR) for converting four multiplying powers into two multiplying powers, one second Limiter (LPDR) for converting two multiplying powers into four multiplying powers, two hook-changing Limiters (LPG) for detecting the work of the grapple (3) and a conversion frame (51), wherein the detection Limiters (LPSD), the second Limiters (LPDR), the first Limiters (LPSR) and the hook-changing Limiters (LPG) are fixedly arranged on the conversion frame (51);
the conversion frame (51) comprises two guide rods (511), a first bottom plate (514) for fixedly mounting a first Limiter (LPSR) and a second Limiter (LPDR), a third bottom plate (515) for fixedly mounting a hook replacement Limiter (LPG), two second bottom plates (516) for fixedly mounting a detection Limiter (LPSD), a third lug plate (517) for fixing a grapple (3), a second lug plate (513) for hinging an arm end section (4), a third connecting plate (519), a third reinforcing plate (518), a rectangular pipe (520), a short square pipe (521), a first channel steel (512) and a second channel steel (522); the two ends of the short square tube (521) are fixedly connected with the first channel steel (512) and the second channel steel (522) respectively, the number of the rectangular tubes (520) is two, the side edge of one end of each rectangular tube is fixedly connected with the two ends of the first channel steel (512) and the second channel steel (522), and the two sides of the other end of each rectangular tube are fixedly connected with the second lug plates (513); one end of the guide rod (511) passes through round holes of two third connecting plates (519) and is fixedly connected with the round holes, one end of the two third connecting plates (519) is fixedly connected with the outer middle sides of the first channel steel (512) and the second channel steel (522), and the third reinforcing plate (518) is fixedly connected with two sides of the third connecting plates (519) and is fixedly connected with the first channel steel (512) and the second channel steel (522); the third lug plates (517) are fixedly connected in the first channel steel (512) and the second channel steel (522), two groups of the third lug plates are arranged, the third bottom plates (515) are fixedly connected on the short square pipe (521), the second bottom plates (516) are fixedly connected under the first channel steel (512), and the first bottom plates (514) are fixedly connected on the outer sides of the guide rods (511) at the sides of the first channel steel (512); the conversion frame is characterized in that two ends of the conversion frame (51) further comprise an inner plate (525) through which a lifting wire rope passes, a fourth connecting plate (526), a sealing plate (527), a fourth reinforcing plate (528), a fifth connecting plate (529) and a guard plate (56), the sealing plate (527) is fixedly connected to two ends of the rectangular tube (520), one ends of the fourth connecting plate (526) and the fifth connecting plate (529) are fixedly connected under the sealing plate (527), the other ends of the fourth connecting plate (526) and the fifth connecting plate (529) are fixedly connected to the inner plate (525), four ends of the fourth reinforcing plate (528) are fixedly connected with the sealing plate (527), the fourth connecting plate (526), the fifth connecting plate (529) and the inner plate (525) respectively, and a notch of the inner plate (525) is used for fixing the guard plate (56) on the inner plate (525) so as to prevent the lifting wire rope from contacting with the inner plate (525) and escaping;
the grapple (3) comprises a hook (31) for fixing a push rod on the four-multiplying-power pulley block (2), a flitch (35) for fixing a second inclined plate (55), round steel (32) for fixing on a third lug plate (517) of the conversion frame (51), a sixth connecting plate (33) and a shaft (34) for fixing a connecting rod (52), wherein the hook (31) is provided with a hole, the round steel (32) penetrates through the hole of the hook (31) and is fixedly connected, the two ends of the round steel are equal in extension length, the sixth connecting plate (33) is provided with two holes, one hole is fixedly connected on the round steel (32), and the other hole is fixedly connected with the shaft (34); the flitch (35) is fixedly connected to two sides of the hook (31), two threaded holes are formed in the flitch (35), two grapples (3) are arranged, and the flitch is fixed on a third lug plate (517) on the conversion frame (51);
the automatic multiplying power conversion device of the movable arm tower crane can complete automatic multiplying power conversion by only needing a driver to operate in a cab and matching the electric and structural members, thereby realizing conversion between two/four times of multiplying power; the control panel in the cab is distributed with a quadruple rate indicator lamp (B), a two-multiplying power indicator lamp (A), a multiplying power change-over switch (I) and a grapple (3) for changing the red indicator lamp (E), wherein the multiplying power change-over switch I is divided into a two-multiplying power change-over position (C) and a quadruple rate change-over position (D).
2. The magnification conversion device according to claim 1, wherein: the conversion system (5) further comprises a connecting rod (52), a spring (53), a lock turnbuckle (54) and a second inclined plate (55), wherein two ends of the lock turnbuckle (54) are respectively hinged with the spring (53), the other end of the spring (53) is hinged with the connecting rod (52), the other end of the connecting rod (52) is fixed with the shaft (34), the second inclined plate (55) is fixed on a flitch (35) of the grappling hook (3), two grappling hooks (3) are arranged on each grappling hook, and when the four-time rate conversion is carried out, the second inclined plate (55) collides with a stop lever (120) on the two-rate lifting hook (1) to enable the grappling hooks (3) to return to the original positions.
3. The method for using the automatic magnification conversion device of the swing arm tower crane according to claim 1, comprising the following steps: automatic conversion of two multiplying powers of the movable arm tower crane into four multiplying powers, and automatic conversion of four multiplying powers of the movable arm tower crane into two multiplying powers;
the automatic conversion of the two multiplying powers of the movable arm tower crane into four multiplying powers comprises the following steps:
(S1) before converting two multiplying powers into four multiplying powers, a multiplying power converting switch (I) is required to be turned into a four-multiplying power position (C) on a control panel in a cab;
(S2) operating the two-multiplying-power lifting hook (1) to ascend, so that a guide rod (511) on the conversion system (5) is inserted into a guide opening (23) of the four-multiplying-power pulley block (2), and the four-multiplying-power pulley block (2) can be contacted with a detection Limiter (LPSD) switch on the conversion system (5) during the period, so that the conversion system (5) and the four-multiplying-power pulley block (2) are combined together;
(S3) the two-multiplying-power lifting hook (1) continuously ascends to enable the push rod (22) on the four-multiplying-power pulley block (2) to push the grapple (3), the hook replacement Limiter (LPG) stops working, and then a red indicator lamp (E) on a control panel in a cab is lightened;
(S4) the two-multiplying-power lifting hook (1) continues to ascend until the push rod (22) on the four-multiplying-power pulley block (2) exceeds the grapple (3), the grapple (3) returns to the original state, the hook replacement Limiter (LPG) works, and then a red indicator lamp (E) on a control panel in the cab is extinguished;
(S5) the two-multiplying-power lifting hook (1) continues to ascend until the second Limiter (LPDR) works, at the moment, the two-multiplying-power lifting hook (1) cannot continue to ascend, meanwhile, the two-multiplying-power indicator lamp (A) on the control panel in the cab is turned off, the four-multiplying-power indicator lamp (B) is turned on, and the operation mode of the tower crane works in the four-multiplying-power state;
(S6) operating the two-multiplying-power lifting hook (1) to descend, and when the four-multiplying-power pulley block (2) is fixed by the grapple (3), the two-multiplying-power lifting hook (1) descends in a four-multiplying-power mode, and multiplying power conversion is converted into four multiplying powers;
the automatic magnification conversion method for converting the four-time rate of the movable arm tower crane into two magnifications comprises the following steps of:
before the four-time rate conversion of the two multiplying powers, a multiplying power conversion switch (I) is required to be turned to a two multiplying power position (D) on a control panel in a cab;
(T2) operating the two-multiplying-power lifting hook (1) to ascend so that the two-multiplying-power lifting hook (1) collides with the four-multiplying-power pulley block (2);
(T3) continuously lifting the two-multiplying-power lifting hook (1), pushing the grapple (3) by the push rod (22) of the four-multiplying-power pulley block (2), stopping working by the hook replacement Limiter (LPG), and lighting a red indicator lamp (E) on a control panel in the cab;
(T4) the two-rate lifting hook (1) continues to ascend until the push rod (22) on the four-rate pulley block (2) pushes the grapple (3) away, at the moment, the first Limiter (LPSR) works, and at the moment, the two-rate lifting hook (1) cannot continue to ascend;
(T5) operating the two-rate lifting hook (1) to descend, wherein the four-rate pulley block (2) descends together with the two-rate lifting hook (1);
in the process of descending together, a stop lever (120) acting on the grapple hook (3) is arranged on the two-rate lifting hook (1), the grapple hook (3) can be closed, a hook-changing Limiter (LPG) works after the grapple hook (3) is closed, and then a red indicator lamp (E) on a control panel in a cab is extinguished;
(T7) continuing to descend until the detection Limiter (LPSD) separates from the quadruple pulley block (2), indicating that the quadruple pulley block (2) is below the detection Limiter (LPSD); at this time, the four-time rate indicator lamp (B) on the control panel in the cab is turned off, the two-time rate indicator lamp (A) is turned on, and the operation mode of the tower crane works in the two-time rate state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910187614.8A CN109879181B (en) | 2019-03-13 | 2019-03-13 | Automatic multiplying power conversion device of movable arm tower crane and application method thereof |
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| CN201910187614.8A CN109879181B (en) | 2019-03-13 | 2019-03-13 | Automatic multiplying power conversion device of movable arm tower crane and application method thereof |
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| CN109879181B true CN109879181B (en) | 2024-02-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6499611B1 (en) * | 1999-09-13 | 2002-12-31 | Atecs Mannesmann Ag | Mobile harbor crane for normal and heavy load operation |
| CN103803431A (en) * | 2014-03-11 | 2014-05-21 | 中联重科股份有限公司 | Automatic multiplying power changing device and crane with same |
| CN210236924U (en) * | 2019-03-13 | 2020-04-03 | 科曼萨建设机械（杭州）有限公司 | Automatic multiplying power changing conversion device of swing arm tower crane |
-
2019
- 2019-03-13 CN CN201910187614.8A patent/CN109879181B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6499611B1 (en) * | 1999-09-13 | 2002-12-31 | Atecs Mannesmann Ag | Mobile harbor crane for normal and heavy load operation |
| CN103803431A (en) * | 2014-03-11 | 2014-05-21 | 中联重科股份有限公司 | Automatic multiplying power changing device and crane with same |
| CN210236924U (en) * | 2019-03-13 | 2020-04-03 | 科曼萨建设机械（杭州）有限公司 | Automatic multiplying power changing conversion device of swing arm tower crane |
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