CN111516652A - Prepressing device, engineering machinery anti-overturning method and engineering machinery - Google Patents
Prepressing device, engineering machinery anti-overturning method and engineering machinery Download PDFInfo
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- CN111516652A CN111516652A CN202010305411.7A CN202010305411A CN111516652A CN 111516652 A CN111516652 A CN 111516652A CN 202010305411 A CN202010305411 A CN 202010305411A CN 111516652 A CN111516652 A CN 111516652A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010276 construction Methods 0.000 claims abstract description 59
- 238000003825 pressing Methods 0.000 claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 238000005056 compaction Methods 0.000 claims abstract description 7
- 230000002265 prevention Effects 0.000 claims abstract description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
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- 239000000463 material Substances 0.000 description 8
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/10—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure
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Abstract
The invention relates to the technical field of engineering machinery rollover prevention, and discloses a prepressing device, an engineering machinery rollover prevention method and engineering machinery. The pre-compaction device includes connecting seat and pressure piece, the connecting seat is including the connecting portion that are used for connecting pressure device, the pressure piece is connected on the connecting seat and with connecting portion are arranged relatively in the pressure direction, wherein, the pressure piece is including deviating from the pressure contact surface of connecting seat, the pressure piece includes base block and a plurality of regulating block, and is a plurality of the regulating block can be arranged with dismantling the circumference lateral surface of base block is in order to adjust the area of pressure contact surface. The pre-pressing device is arranged on a pressure applying device such as a construction machine and can perform pressure test on the ground before the pressure applying device such as the construction machine is normally operated, so that the operation safety of the pressure applying device such as the construction machine is ensured, and the phenomenon that the ground is overturned due to sinking is avoided.
Description
Technical Field
The invention relates to the technical field of engineering machinery rollover prevention, in particular to a prepressing device, an engineering machinery rollover prevention method and engineering machinery.
Background
In actual operation, the rollover problem of the engineering machinery such as a concrete pump truck is more caused by the weak foundation or the subsidence of the ground. Because the ground sinks, the supporting reaction force provided by the foundation for the supporting legs is insufficient, or in the material distribution process, the supporting legs are required to provide larger supporting reaction force due to the change of the posture of the arm support, and the foundation can not necessarily provide the supporting reaction force meeting the material distribution requirement of the pump truck, so that the gravity center of the pump truck is unstable, and the pump truck overturns. Specifically, when the pump truck works, after the position of the supporting leg of the pump truck is determined, the tipping line of the pump truck is determined, the effective material distribution space of the arm support is determined, and the range of the supporting reaction force required by the supporting leg of the pump truck is determined.
At present, only site constructors estimate the foundation bearing capacity of a construction site according to feeling and experience. However, in actual operation on site, after the support legs are opened and the arm support is unfolded, the load applied to a single support leg by the pump truck in different cloth areas fluctuates correspondingly greatly, for example, the load increases, correspondingly, the pressure of the support leg to the foundation also fluctuates correspondingly, for example, the pressure increases, and the foundation is prone to collapse or sink due to sudden increase of external pressure, so that the counterforce provided by the support leg to the pump truck cannot meet the actual requirement, and the pump truck is unstably overturned, thereby causing life and property loss.
Disclosure of Invention
The invention aims to provide a prepressing device which is arranged on a pressure applying device such as a construction machine and can perform pressure test on the ground before the pressure applying device such as the construction machine is in formal operation, so that the operation safety of the pressure applying device such as the construction machine is ensured, and the phenomenon that the ground is overturned due to sinking is avoided.
In order to achieve the above object, the present invention provides a pre-pressing device, which includes a connecting seat including a connecting portion for connecting a pressing device, and a pressure block connected to the connecting seat and arranged opposite to the connecting portion in a pressure direction, wherein the pressure block includes a pressure contact surface facing away from the connecting seat, the pressure block includes a base block and a plurality of adjusting blocks detachably arranged on a circumferential outer side surface of the base block to adjust an area of the pressure contact surface.
Before a pressure applying device such as an engineering machine starts to operate, a connecting part of a connecting seat of the pre-pressing device can be connected to each supporting leg of the pressure applying device such as the engineering machine, which is described in detail below by taking the engineering machine as an example, at this time, an arm support of the engineering machine is in a folded state, each supporting leg of the engineering machine horizontally extends out, the pressure condition of each supporting leg is judged according to the extension condition of each supporting leg, so that the area of a pressure contact surface of the pre-pressing device on each supporting leg is adjusted, then a vertical oil cylinder of each supporting leg extends downwards towards the ground to enable each pressure contact surface to be in contact with the ground, the vertical oil cylinder of each supporting leg continuously extends out to lift the engineering machine away from the ground, then the pressure can be maintained for a set time, and; then, the vertical oil cylinder is recovered to be in a full-shrinkage state, the pre-pressing device is disassembled, and the sinking condition of the ground is checked; if the ground sunken groove meets the requirement or the support reaction force meets the requirement, the support reaction force provided by the ground in all the operation areas by the arm support of the engineering machinery can meet the normal operation; if the ground subsidence does not satisfy the requirement or the currently measured support reaction force does not satisfy the actual requirement, the region of the ground surface in contact with the pad is reinforced according to the predetermined area size, and if the region of the ground surface cannot be reinforced according to the predetermined area, the working region of the construction machine is limited according to the support reaction force requirement of the construction machine, or the working region of the construction machine is limited according to the reinforcement area size that can be implemented. Therefore, before the construction machine starts to operate on a construction site, the pressure test can be carried out on the supporting ground of the construction site through the pre-pressing device, so that the operation safety of the pressure applying device such as the construction machine is ensured, and the situation that the ground is overturned due to sinking is avoided.
Further, a plurality of the adjusting blocks are arranged on opposite sides of the first direction of the base block.
Still further, a plurality of the adjusting blocks are detachably attached to the circumferential outer side surface of the base block.
Furthermore, a connecting column is arranged on the circumferential outer side face of the base block, a connecting hole is formed in each adjusting block, and the connecting holes can be assembled with the connecting columns so that the adjusting blocks are connected to the connecting columns.
Further, in a second direction perpendicular to the first direction, the length of the adjustment block is the same as the length of the base block.
Further, the circumferentially outer side face of the pressure block and the pressure contact surface are arranged perpendicularly.
Further, the area of the connection portion is larger than the area of the pressure contact surface.
Further, the connecting part is a mounting plane for connecting a base plate of the pressing device, and a fastener mounting hole is formed in the mounting plane.
Further, connecting portion are for holding the heavy groove of pressure device's backing plate, be provided with the flexible joint post that can stretch into to heavy inslot on the groove lateral wall in heavy groove, flexible joint post be used for with the backing plate clamps in heavy inslot.
In addition, the present invention provides a construction machine including a leg and the above-described prestressing device, wherein the connecting portion is detachably connected to the leg. As mentioned above, the safety performance of the engineering machinery is effectively improved.
Further, the engineering machinery is a concrete pump truck or a crane.
In addition, the invention provides an engineering machinery anti-tipping method, which comprises the following steps: keeping an arm support of the engineering machinery in a folded state; horizontally extending a supporting leg of the engineering machinery to a specified position of actual operation, mounting a prepressing device used for being in contact with the ground on a base plate arranged below the supporting leg, adjusting the area of a pressure contact surface of the prepressing device, which is in contact with the ground, and extending a vertical oil cylinder of the supporting leg downwards so that the pressure contact surface of the prepressing device is pressed on the ground and supports the engineering machinery off the ground, maintaining the pressure for a set time, and recording the stable supporting reaction force data of the supporting leg; then, the vertical oil cylinder is recovered to be in a full-shrinkage state, the pre-pressing device is disassembled, and the sinking condition of the ground is checked; if the ground sunken groove meets the requirement or the support reaction force meets the requirement, the support reaction force provided by the ground in all the operation areas of the arm support can meet the normal operation; if the ground subsidence does not satisfy the requirement or the currently measured support reaction force does not satisfy the actual requirement, the region of the ground surface in contact with the pad is reinforced according to the predetermined area size, and if the region of the ground surface cannot be reinforced according to the predetermined area, the working region of the construction machine is limited according to the support reaction force requirement of the construction machine, or the working region of the construction machine is limited according to the reinforcement area size that can be implemented.
Thus, as described above, the anti-tipping method for the engineering machine can perform a pressure test on the supporting ground of the construction site, thereby ensuring the operation safety of the engineering machine and avoiding tipping caused by ground depression.
Further, in the right and left width direction of the construction machine, the area of the pressure contact surface is adjusted by attaching and detaching a plurality of regulating blocks to and from opposite sides of a base block of the pre-pressing device, wherein a bottom surface of the base block and bottom surfaces of the plurality of regulating blocks disposed on opposite sides of the base block together form the pressure contact surface.
Further, the engineering machinery anti-tipping method is a concrete pump truck anti-tipping method.
Finally, the invention provides an engineering machine capable of implementing the method for preventing the engineering machine from tipping.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a pre-pressing device according to an embodiment of the present invention, wherein adjusting blocks are not disposed on two sides of a base block;
fig. 2 is a schematic structural view of the pre-pressing device of fig. 1 disposed on a pressing device such as a leg of the construction machine and approaching toward the ground, wherein adjusting blocks are disposed on both sides (in the left-right width direction of the construction machine) of a base block;
fig. 3 is a schematic structural view of another pre-pressing device provided in an embodiment of the present invention, which is disposed on a pressing device such as a leg of a construction machine and is close to the ground, wherein adjustment blocks are disposed on both sides of a base block (in the left-right width direction of the construction machine).
Description of the reference numerals
1-connecting seat, 2-pressure block, 3-pressure contact surface, 4-base block, 5-regulating block, 6-connecting column, 7-backing plate, 8-mounting plane, 9-sinking groove, 10-groove side wall, 11-telescopic clamping column, 12-supporting leg, 13-force sensor, 14-first direction, 15-second direction and 16-ground.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to the structures shown in fig. 1, 2 and 3, the pre-pressing device provided by the invention comprises a connecting seat 1 and a pressure block 2, wherein the connecting seat 1 comprises a connecting part for connecting a pressure applying device, the pressure block 2 is connected on the connecting seat 1 and is oppositely arranged with the connecting part in a pressure direction, the pressure block 2 comprises a pressure contact surface 3 which is far away from the connecting seat 1, the pressure block 2 comprises a base block 4 and a plurality of adjusting blocks 5, and the plurality of adjusting blocks 5 are detachably arranged on the circumferential outer side surface of the base block 4 to adjust the area of the pressure contact surface 3.
Since the plurality of adjusting blocks 5 are detachably arranged on the circumferential outer side surface of the base block 4 to adjust the area of the pressure contact surface 3, before a pressure applying device such as an engineering machine starts to operate, the connecting part of the connecting seat of the prepressing device can be connected to each supporting leg of the pressure applying device such as an engineering machine, which will be described in detail below by taking the engineering machine as an example, at this time, the arm support of the engineering machine is in a folded state, each supporting leg of the engineering machine horizontally extends out, the pressure condition of each supporting leg is judged according to the extending condition of each supporting leg, so as to adjust the area of the pressure contact surface of the prepressing device on each supporting leg, then the vertical oil cylinder of each supporting leg extends downwards towards the ground to enable each pressure contact surface to contact the ground, the vertical oil cylinder of each supporting leg continues to extend out to lift the engineering machine away from the ground, recording the stable support reaction force data of each support leg; then, the vertical oil cylinder is recovered to be in a full-shrinkage state, the pre-pressing device is disassembled, and the sinking condition of the ground is checked; if the ground sunken groove meets the requirement or the support reaction force meets the requirement, the support reaction force provided by the ground in all the operation areas by the arm support of the engineering machinery can meet the normal operation; if the ground subsidence does not satisfy the requirement or the currently measured support reaction force does not satisfy the actual requirement, the region of the ground surface in contact with the pad is reinforced according to the predetermined area size, and if the region of the ground surface cannot be reinforced according to the predetermined area, the working region of the construction machine is limited according to the support reaction force requirement of the construction machine, or the working region of the construction machine is limited according to the reinforcement area size that can be implemented. Therefore, before the construction machine starts to operate on a construction site, the pressure test can be carried out on the supporting ground of the construction site through the pre-pressing device, so that the operation safety of the pressure applying device such as the construction machine is ensured, and the situation that the ground is overturned due to sinking is avoided.
In the construction machine, the pre-pressing device can be accommodated and placed on the construction machine as a vehicle-mounted tool of the construction machine when the construction machine is not operated or a construction site is changed.
Although the construction machine is taken as an example, the pressure cylinder may be provided with the pre-pressing device to perform a pressure test on the ground as a foundation, so as to ensure the stability of the other types of pressure devices in the actual pressure application and prevent the rollover of the pressure devices due to the ground not meeting the supporting requirement.
In addition, the shape of the base block 4 may have various forms, for example, in one form, the base block 4 may be a cylindrical or elliptical cylinder, and in this case, the plurality of regulating blocks 5 may be cylinders having different diameters and capable of being nested one after another, so that the cylinders are nested one after another as required for the area regulation of the pressure contact surface 3. Or, in another form, base block 4 can be the polygon cylinder, for example can be cuboid or square, and at this moment, regulating block 5 can be the block, and like this, a plurality of regulating blocks 5 are arranged in the relative both sides of the first direction 14 of base block 4 to can make pressure contact surface 3 increase and decrease for pre-compaction device's vertical center line more balanced, promote pre-compaction device's pressurized equilibrium nature, in order to carry out the pressure testing to ground better.
Of course, the first direction 14 may be a lateral width direction of the construction machine, or may be a longitudinal direction of the construction machine. In the configuration shown in fig. 2, the first direction 14 is the left-right width direction of the construction machine. The plurality of adjustment blocks may have the same thickness or different thicknesses in the first direction 14.
In addition, a plurality of regulating blocks 5 can be detachably connected on connecting seat 1, for example, be formed with a plurality of draw-in grooves on connecting seat 1, every regulating block 5 then can the joint in each draw-in groove. Or, as shown in fig. 1 and 2, a connection column 6 is provided on the circumferential outer side surface of the base block 4, and a connection hole is formed on each adjustment block 5, which can be assembled with the connection column 6 so that the adjustment block 5 is connected to the connection column 6. Thus, when the area of the pressure contact surface 3 needs to be adjusted, all the adjusting blocks 5 are sleeved on the connecting column 6 according to needs. Of course, the number of connecting columns 6 can be one or more, for example two or three.
In addition, in fig. 2, the length of the adjustment block 5 is the same as that of the base block 4 in the second direction 15 perpendicular to the first direction 14, so that the press-contact surface 3 may be formed in a rectangular shape, thereby making it easier to determine the area of the press-contact surface 3.
In addition, as shown in fig. 1 and 2, the circumferential outer side surface of the pressure block 2 and the pressure contact surface 3 are arranged vertically, that is, the corner of the pressure block 2 contacting the ground is formed into a right angle, so that it can be ensured that the contact area of the pre-pressing device and the ground is not increased and the measurement result of the support reaction force is not affected when the ground sinks or the pre-pressing device sinks slightly.
In addition, as shown in fig. 1 and 2, the area of the connecting portion is larger than the area of the pressure contact surface 3, so that, since the connecting portion can be used to connect the pad plates 7 of the legs, the area of the pad plates 7 can be made larger than the area of the pressure contact surface 3. When the ground subsides and does not satisfy the pressure support requirement, can process ground according to the area size of backing plate 7, like this, when engineering machine began the operation, backing plate 7 will be supported on the ground of reinforcement steadily reliably to avoid backing plate 7 to sink, promoted engineering machine operation's security and reliability.
In addition, in the pre-pressing device, the connecting part may have various structural forms, but it should be understood that the connecting part may have any structural form as long as it can be connected with a pressing device such as a pad plate on a leg of the construction machine. For example, in one configuration of the connecting portion, as shown in fig. 3, the connecting portion is a mounting plane 8 for connecting a pad 7 of a pressing device, and a fastener mounting hole is formed on the mounting plane 8, that is, the connecting base 1 may be a block having an upper surface as a mounting plane, so that the pad 7 may be horizontally placed on the mounting plane 8 and connected by a fastener, such as a bolt, passing through the pad 7 and the mounting plane 8.
Or, in another structural form of the connecting portion, as shown in fig. 1, the connecting portion is a sinking groove 9 for accommodating a cushion plate 7 of the pressure applying device, a telescopic clamping column 11, such as a pin or a bolt, which can extend into the sinking groove, is arranged on a groove side wall 10 of the sinking groove 9, the telescopic clamping column 11 is used for clamping the cushion plate 7 in the sinking groove 9, so that the telescopic clamping column 11 can be moved outwards, after the cushion plate 7 is accommodated in the sinking groove 9, the telescopic clamping column 11 extends inwards to be clamped above the cushion plate 7, so as to position the cushion plate 7 in the sinking groove 9, and thus, the pre-pressing device is connected to the pressure applying device, such as a supporting leg 12 of the engineering machine.
In addition, the present invention provides a construction machine comprising a leg 12 and the prestressing device as described in any of the above, wherein the connecting portion is detachably connected to the leg 12. Thus, as described above, the safety performance of the construction machine is effectively improved.
Of course, the engineering machine may be an engineering machine with an arm support and a leg support, such as an aerial work vehicle, for example, a folding arm type aerial work vehicle or an aerial ladder fire truck, a crane, for example, an all-terrain crane, or may be a concrete pump truck.
The concrete pump truck is taken as an example for explanation: after the concrete pump truck reaches a working destination, before the arm support is opened for normal material distribution, pressure test operation is firstly carried out so as to examine the ground (foundation) bearing condition below the supporting legs. The concrete pump truck is parked to a construction position, the construction site is inspected and cleaned, the arm support is kept in a folded state at the moment, the support legs horizontally extend out to an actual working specified position (namely the extension length of the support legs of the pump truck and the ground contact position are basically consistent with the actual working state of the pump truck), and the pre-pressing devices are arranged on all four support legs. Then slowly extend the vertical hydro-cylinder of landing leg downwards to make the landing leg support whole car gradually, the tire liftoff, pump truck partial shipment to operating condition under, the vertical hydro-cylinder of landing leg stretches to the assigned position this moment, and the pre-compaction device that sets up on 4 landing legs presses subaerial, and the pressurize scheduled time is for example 5 minutes, and the counter force data of the force transducer on the stable back landing leg is recorded. And (5) recovering the vertical oil cylinder of the supporting leg to a fully contracted state, disassembling the lower pre-pressing device and checking the sinking condition of the ground. If the sunken groove meets the requirement or the support reaction force meets the requirement, the support reaction force provided by the foundation of the arm support distribution whole area can meet the normal work, and the pump truck finishes the evaluation of the pressure intensity of the foundation and starts to carry out the work according to the normal operation. And if the foundation settlement does not meet the requirement or the currently measured support reaction load does not meet the actual requirement, reinforcing the area of the pad plate below the support leg according to the area of the pad plate of the support leg. When the ground reinforcing area can not be increased according to the designated area, the material distribution area of the pump truck is limited according to the support reaction force requirement of each working condition of the pump truck, so that the normal work of the arm support is ensured, or the material distribution area of the pump truck is limited according to the practical and feasible reinforcing area.
When the weight of the arm support is known when the arm support is folded under the condition of the whole concrete pump truck, the extension length of the supporting leg of the pump truck or the opening degree of the swinging leg is adjusted to be consistent with the actual working state of the pump truck, and at the moment, the vertical oil cylinder of the supporting leg of the pump truck keeps a contraction state. Through the opening degree and the preparation quality information of the supporting legs, the pump truck system can calculate the theoretical load F of each supporting leg in the initial arm support folding state(c,i)And the theoretical maximum supporting reaction force F borne by the supporting leg when the pump truck distributes materials under the current supporting leg opening state(max,i). The area S1 of the lower end of the leg plate is known, and the area S of each leg prepressing device(2,i)＝S1*F(c,i)/F(max,i)And i is 1, 2, 3 and 4, which respectively represent one of the four legs. Area S of the pre-pressing device of each leg(2,i)After obtaining the area, the pressure contact area of the pre-pressing device and the calculated area S are enabled to pass through a plurality of adjusting blocks(2,i)And the four support legs are close to or the same as each other, and the pressure contact areas of the four support legs are adjusted by different adjusting blocks according to the calculation result.
The length d of the adjusting blocks is the same as that of the base block in the second direction, and the adjusting blocks are closely attached to the base block, and the thickness of the adjusting blocks in the first direction has various specifications (for example, h)1、h2…), the pressure contact area S can be calculated by a plurality of adjusting blocks(2,i)＝S(0,i)+d*(h1+h2),S(0,i)Is the bottom area of the base block.
And in the pressure testing stage, the extension length and the ground contact position of the supporting legs of the pump truck are consistent with the region to be born by the supporting legs when the pump truck works actually. At the moment, the arm support of the pump truck keeps a folded state unchanged, the supporting legs are extended, and the prepressing devices are installed on the supporting legs. Theoretical load F of each support leg in initial arm support folding state under current support leg state(c,i)The theoretical maximum support reaction force F borne by the support leg during the material distribution of the pump truck under the current support leg opening state(max,i). The area of each supporting leg base plate is S(1,i)Therefore, when the normal distribution of the whole area of the arm support is ensured, the support reaction pressure P provided by the foundation(1,i)＝F(max,i)/S(1,i). The upper end of the prepressing device is fixed with the supporting leg base plate, and the prepressing deviceThe area of the lower end is S(2,i)And the current load of the whole vehicle weight is transmitted to the pre-pressing device through the supporting legs and the supporting leg sensor and finally to the foundation. The actual measurement value of the force sensor in the current pressure test stage is F(s,i)Current foundation bearing reaction pressure P(2,i)＝F(s,i)/S(2,i)，P1＝P2Indicating that the current foundation bearing pressure meets the requirements, i.e. F(max,i)/S(1,i)＝F(s,i)/S(2,i)，F(s,i)＝S(2,i)*F(max,i)/S(1,i)。
If the force sensor is now stable(s,i)<F(c,i)If so, the current foundation does not meet the design requirement, and the foundation bears the pressure P at the moment(2,i)＝F(s,i)/S(2,i). At this time, a reinforcement region (predetermined area) S of the ground foundation below each leg is required(3,i)＝F(max,i)/P(2,i)(ii) a If the foundation can not be strengthened to S(3,i)The reinforced area is S(4,i)The support reaction force F which can be provided for arm frame distribution on the current ground(m,i)＝P(2,i)*S(4,i)Controlling the operation area of the arm support through an anti-tipping program to ensure that the support reaction force of each leg is less than F(m,i)。
If force sensor F is present(s,i)＝F(c,i)And simultaneously checking whether the sinking of the foundation of the pre-pressing device meets the requirement, and if so, indicating that the current foundation meets the requirement of concrete construction. If the ground subsides obviously, need to strengthen the ground, than the actual area S of the supporting leg base plate(1,i)It is slightly larger.
The pre-pressing operation is convenient, and the tipping damage to the pump truck in the operation process is greatly reduced. Under the condition of pre-pressing, if the force sensor F(s,i)＝F(c,i)And the arm support can work normally, and the pump truck can not tip over. Measured value F of force sensor(s,i)Is smaller than the current leg opening and the leg support counterforce F when the arm support is folded(c,i)In the state, because the arm support of the pump truck is in the initial folded state at the moment, and because the support legs extend downwards slowly under the pre-pressing working condition, the tire gradually leaves the ground, and at the moment, if the tire is supported by the groundThe counter force is not enough or sinks, the pump truck inclines, the tire quickly contacts the ground, and meanwhile, the arm support is folded, so that the damage to the pump truck and the outside is very small.
The load of current landing leg does not have the maximum load F of cantilever crane during operation big, but the bearing area S of landing leg is reduced exactly to the prepressing mechanism on the landing leg, so can judge the reaction pressure condition on current ground, because the prepressing pressurized area is less than actual landing leg area, based on this, can judge the bearing pressure of initial ground, guarantee pump truck safety work in the whole region.
In addition, the present invention provides an anti-toppling method of an engineering machine, including: keeping an arm support of the engineering machinery in a folded state; horizontally extending a supporting leg of the engineering machinery to a specified position of actual operation, mounting a prepressing device used for being in contact with the ground on a base plate arranged below the supporting leg, adjusting the area of a pressure contact surface of the prepressing device, which is in contact with the ground, and extending a vertical oil cylinder of the supporting leg downwards so that the pressure contact surface of the prepressing device is pressed on the ground and supports the engineering machinery off the ground, maintaining the pressure for a set time, and recording the stable supporting reaction force data of the supporting leg; then, the vertical oil cylinder is recovered to be in a full-shrinkage state, the pre-pressing device is disassembled, and the sinking condition of the ground is checked; if the ground sunken groove meets the requirement or the support reaction force meets the requirement, the support reaction force provided by the ground in all the operation areas of the arm support can meet the normal operation; if the ground subsidence does not satisfy the requirement or the currently measured support reaction force does not satisfy the actual requirement, the region of the ground surface in contact with the pad is reinforced according to the predetermined area size, and if the region of the ground surface cannot be reinforced according to the predetermined area, the working region of the construction machine is limited according to the support reaction force requirement of the construction machine, or the working region of the construction machine is limited according to the reinforcement area size that can be implemented. Thus, as described above, the anti-tipping method for the engineering machine can perform a pressure test on the supporting ground of the construction site, thereby ensuring the operation safety of the engineering machine and avoiding tipping caused by ground depression.
In addition, the area of the pressure contact surface is adjusted by attaching and detaching a plurality of adjusting blocks to and from opposite sides of a base block of the pre-pressing device in the left-right width direction of the construction machine, wherein the bottom surface of the base block and the bottom surfaces of the plurality of adjusting blocks disposed on the opposite sides of the base block together form the pressure contact surface. Like this, can be so that the pressure contact surface can increase and decrease for pre-compaction device's vertical central line more balanced, promote pre-compaction device's pressurized equilibrium nature to carry out the pressure testing to ground better. In addition, the engineering machinery anti-tipping method can be an anti-tipping method of a crane, such as an all-terrain crane, or can be an anti-tipping method of a folding arm type aerial work vehicle, or can be an anti-tipping method of an aerial ladder fire truck, or can be an anti-tipping method of a concrete pump truck.
Finally, the invention provides an engineering machine, such as an all-terrain crane, a folding-arm type overhead working truck, an aerial ladder fire truck or a concrete pump truck, which can implement the anti-tipping method of the engineering machine.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition. In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (15)
1. The utility model provides a pre-compaction device, its characterized in that, includes connecting seat (1) and pressure piece (2), connecting seat (1) is including the connecting portion that are used for connecting pressure device, pressure piece (2) are connected on connecting seat (1) and with connecting portion are arranged relatively in the pressure direction, wherein, pressure piece (2) are including deviating from pressure contact surface (3) of connecting seat (1), pressure piece (2) are including base block (4) and a plurality of regulating block (5), and are a plurality of regulating block (5) can be arranged with dismantling the circumference lateral surface of base block (4) is in order to adjust the area of pressure contact surface (3).
2. Prepressing arrangement according to claim 1, characterized in that a plurality of the adjusting blocks (5) are arranged on opposite sides of the base block (4) in the first direction.
3. Prepressing arrangement according to claim 2, characterized in that a plurality of the adjusting blocks (5) are detachably connected on a circumferential outer side of the base block (4).
4. The pre-pressing device according to claim 3, characterized in that connecting columns (6) are arranged on the circumferential outer side of the base block (4), and each adjusting block (5) is formed with a connecting hole which can be assembled with the connecting column (6) so that the adjusting block (5) is connected to the connecting column (6).
5. Prepressing arrangement according to claim 2, characterized in that the length of the adjusting block (5) is the same as the length of the base block (4) in a second direction perpendicular to the first direction.
6. Prepressing arrangement according to claim 1, characterized in that the circumferential outer side of the pressure block (2) and the pressure contact surface (3) are arranged perpendicularly.
7. Prepressing arrangement according to claim 1, characterized in that the area of the connection is larger than the area of the pressure contact surface (3).
8. Prepressing device according to any of claims 1 to 7, characterized in that the connecting portion is a mounting plane (8) for connecting a shim plate (7) of a pressing device, and the mounting plane (8) is formed with fastener mounting holes.
9. The prepressing device according to any one of claims 1 to 7, characterized in that the connecting portion is a sinking groove (9) for accommodating a backing plate (7) of the pressing device, a telescopic clamping column (11) which can extend into the sinking groove is arranged on a groove side wall (10) of the sinking groove (9), and the telescopic clamping column (11) is used for clamping the backing plate (7) in the sinking groove (9).
10. A working machine, characterized by comprising legs (12) and a prestressing device according to any one of claims 1-9, wherein the connecting portion is detachably connected to the legs (12).
11. The working machine according to claim 10, characterized in that the working machine is a concrete pump truck or a crane.
12. An anti-tipping method for construction machinery, which is characterized by comprising the following steps:
keeping an arm support of the engineering machinery in a folded state;
horizontally extending a supporting leg of the engineering machinery to a specified position of actual operation, mounting a prepressing device used for being in contact with the ground on a base plate arranged below the supporting leg, adjusting the area of a pressure contact surface of the prepressing device, which is in contact with the ground, and extending a vertical oil cylinder of the supporting leg downwards so that the pressure contact surface of the prepressing device is pressed on the ground and supports the engineering machinery off the ground, maintaining the pressure for a set time, and recording the stable supporting reaction force data of the supporting leg;
then, the vertical oil cylinder is recovered to be in a full-shrinkage state, the pre-pressing device is disassembled, and the sinking condition of the ground is checked;
if the ground sunken groove meets the requirement or the support reaction force meets the requirement, the support reaction force provided by the ground in all the operation areas of the arm support can meet the normal operation;
if the ground subsidence does not satisfy the requirement or the currently measured support reaction force does not satisfy the actual requirement, the region of the ground surface in contact with the pad is reinforced according to the predetermined area size, and if the region of the ground surface cannot be reinforced according to the predetermined area, the working region of the construction machine is limited according to the support reaction force requirement of the construction machine, or the working region of the construction machine is limited according to the reinforcement area size that can be implemented.
13. The anti-toppling method for a construction machine according to claim 12, wherein the area of the pressure contact surface is adjusted by attaching and detaching a plurality of adjusting blocks to and from opposite sides of a base block of the pre-pressing device in the left-right width direction of the construction machine, wherein a bottom surface of the base block and bottom surfaces of the plurality of adjusting blocks disposed on opposite sides of the base block together form the pressure contact surface.
14. The construction machine rollover prevention method as recited in claim 12 or 13, wherein the construction machine rollover prevention method is a concrete pump truck rollover prevention method.
15. A working machine, characterized in that it is capable of performing the method of preventing a work machine from tipping as claimed in any one of claims 12-14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305411.7A CN111516652B (en) | 2020-04-17 | 2020-04-17 | Prepressing device, engineering machinery anti-overturning method and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305411.7A CN111516652B (en) | 2020-04-17 | 2020-04-17 | Prepressing device, engineering machinery anti-overturning method and engineering machinery |
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| CN111516652A true CN111516652A (en) | 2020-08-11 |
| CN111516652B CN111516652B (en) | 2022-03-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0623491Y2 (en) * | 1989-07-26 | 1994-06-22 | 株式会社アイチコーポレーション | Horizontal body installation device |
| JP2000136091A (en) * | 1998-10-30 | 2000-05-16 | Komatsu Ltd | Sink judge device of working car provided with outrigger |
| CN203005392U (en) * | 2012-12-05 | 2013-06-19 | 三一重工股份有限公司 | Counter weight landing leg base plate and engineering machinery |
| CN110194131A (en) * | 2019-06-13 | 2019-09-03 | 沛县迅驰专用车辆制造有限公司 | A kind of split type supporting arrangement of semitrailer |
| CN110254401A (en) * | 2019-06-13 | 2019-09-20 | 徐州比亚机械设备有限公司 | A kind of semitrailer lifting landing leg |
-
2020
- 2020-04-17 CN CN202010305411.7A patent/CN111516652B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0623491Y2 (en) * | 1989-07-26 | 1994-06-22 | 株式会社アイチコーポレーション | Horizontal body installation device |
| JP2000136091A (en) * | 1998-10-30 | 2000-05-16 | Komatsu Ltd | Sink judge device of working car provided with outrigger |
| CN203005392U (en) * | 2012-12-05 | 2013-06-19 | 三一重工股份有限公司 | Counter weight landing leg base plate and engineering machinery |
| CN110194131A (en) * | 2019-06-13 | 2019-09-03 | 沛县迅驰专用车辆制造有限公司 | A kind of split type supporting arrangement of semitrailer |
| CN110254401A (en) * | 2019-06-13 | 2019-09-20 | 徐州比亚机械设备有限公司 | A kind of semitrailer lifting landing leg |
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| CN111516652B (en) | 2022-03-29 |
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