CN103866814B - Flexible pipe follow-up device and hydraulic grab machinery - Google Patents
Flexible pipe follow-up device and hydraulic grab machinery Download PDFInfo
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- CN103866814B CN103866814B CN201410115989.0A CN201410115989A CN103866814B CN 103866814 B CN103866814 B CN 103866814B CN 201410115989 A CN201410115989 A CN 201410115989A CN 103866814 B CN103866814 B CN 103866814B
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- 238000004146 energy storage Methods 0.000 claims abstract description 75
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 284
- 239000010720 hydraulic oil Substances 0.000 claims description 39
- 230000001502 supplementing effect Effects 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 8
- 230000002441 reversible effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a kind of flexible pipe follow-up device and hydraulic grab machinery, relate to technical field of engineering machinery.Solve prior art and there is low technical problem in application life of flexible pipe.This flexible pipe follow-up device comprises energy-storage travelling wave tube, flexible pipe and hydraulic energy conversion driving mechanism, and hydraulic energy conversion driving mechanism is connected between energy-storage travelling wave tube and flexible pipe; Be stored in energy-storage travelling wave tube by hydraulic energy after the mechanical energy produced in flexible pipe extending process can be converted to hydraulic energy by hydraulic energy conversion driving mechanism, hydraulic energy conversion driving mechanism can also receive the hydraulic energy of energy-storage travelling wave tube release and utilize this hydraulic energy to drive flexible pipe to regain.This hydraulic grab machinery comprises hydraulic grab body, bucket body folding oil cylinder, turntable and flexible pipe follow-up device provided by the invention.The present invention, for improving the application life of flexible pipe, reduces the power attenuation of hydraulic system.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a hose follow-up device and a hydraulic grab bucket machine with the same.
Background
The continuous wall hydraulic grab is one of hydraulic grab machines, is a foundation engineering construction machine, is low in construction cost and high in construction efficiency, and the excavation depth can reach 100 meters. The closing and opening of the hydraulic grab bucket body of the continuous wall are driven by an oil cylinder (the oil cylinder can be called as a bucket body opening and closing oil cylinder) on a frame of the hydraulic grab bucket body. When the hydraulic grab bucket is lifted or lowered, the hose wound on the reel also needs to be lifted synchronously along with the grab bucket body, and how to realize synchronization is a key technology of the hydraulic grab bucket.
In order to solve the problems, a pump is adopted to directly drive a hydraulic motor to drive a hose to lift in the prior art. At present, a compression spring is adopted in the prior art to realize synchronous lifting of a hose along with a grab bucket body, specifically, when the grab bucket body descends, a reel rotates under the tension of the hose, the spring is compressed through a specific device to store energy, and when the grab bucket body ascends, the spring releases energy to drive the reel to reversely rotate and retract the hose.
The applicant found that: the prior art at least has the following technical problems:
adopt the pump direct drive hydraulic motor to drive the hose and go up and down among the prior art, its main shortcoming is that hydraulic motor exerts the biggest pulling force to the hose all the time, and this has just reduced the life of hose.
The hose is synchronously lifted along with the grab bucket body by adopting the compression spring, so that power loss is reduced, but the size of the compression spring is too large, the cost is high, and the processing and the installation of the compression spring are greatly limited; meanwhile, after the spring fails, the hose cannot be lifted synchronously, the grab bucket body can break the hose which cannot be lifted in the groove, the service life of the hose is shortened, and the grab bucket body is difficult to lift out of the groove.
Disclosure of Invention
One of the purposes of the present invention is to provide a hose follower device and a hydraulic grab machine with the same, which solve the technical problem of the prior art that the service life of the hose is short.
The optimal technical scheme in the technical schemes provided by the invention also solves the problems that the existing synchronous lifting technology has a complex structure and cannot be found and maintained in time once a problem occurs, and the details are described below. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the hose servo device provided by the embodiment of the invention comprises an energy storage element, a hose and a hydraulic energy conversion driving mechanism, wherein:
the hydraulic energy conversion driving mechanism is connected between the energy storage element and the hose;
the hydraulic energy conversion driving mechanism can convert mechanical energy generated in the process that the hose stretches out into hydraulic energy and then store the hydraulic energy in the energy storage element, and the hydraulic energy conversion driving mechanism can also receive the hydraulic energy released by the energy storage element and drive the hose to retract by utilizing the hydraulic energy.
In a preferred or alternative embodiment, the energy storage element is an accumulator, and the hydraulic energy conversion drive mechanism comprises a hydraulic motor, a tank, a reel, and a bracket, wherein:
the reel is movably connected with the support, the reel is connected with a rotating shaft of the hydraulic motor, the reel can drive the rotating shaft of the hydraulic motor to rotate relative to the support, and the rotating shaft of the hydraulic motor can drive the reel to rotate relative to the support;
the hydraulic motor comprises a first oil port and a second oil port, the first oil port is connected with the oil tank, and the second oil port is connected with a hydraulic oil port of the energy storage element;
when the rotating shaft rotates along a preset direction, the hydraulic oil sucked by the first oil port can be output from the second oil port, and the rotating shaft can also rotate along the reverse direction of the preset direction under the driving of the hydraulic oil input by the second oil port;
the hose is wound on the reel, one end of the hose extends out of the reel, the other end of the hose is connected with a static piece, and the static piece and the bracket are kept static relatively.
In a preferred or optional embodiment, the oil inlet of the oil tank is connected with the first oil port through a first check valve, and the oil outlet of the oil tank is connected with the first oil port through a second check valve.
In a preferred or optional embodiment, the hose follower further comprises an oil drain path, the oil drain path comprises a reversing valve and an oil drain overflow valve, wherein:
the outlet of the oil drainage overflow valve is connected with the oil tank, the reversing valve is connected to an oil path between a hydraulic oil port of the energy storage element and the inlet of the oil drainage overflow valve, and the reversing valve can control whether the oil path between the hydraulic oil port of the energy storage element and the inlet of the oil drainage overflow valve is communicated or not.
In a preferred or optional embodiment, the hose follower further includes an oil supply path, the oil supply path includes an oil supply device, and an oil outlet of the oil supply device is connected to the hydraulic oil port of the energy storage element and the second oil port.
In a preferred or optional embodiment, the oil supply circuit further includes an oil supply check valve, an oil outlet of the oil supply check valve is connected to the hydraulic oil port of the energy storage element and the second oil port, an oil outlet of the oil supply device is connected to an oil inlet of the oil supply check valve, wherein:
the oil supplementing oil way also comprises a pressure reducing valve connected between an oil outlet of the oil supply device and an oil inlet of the oil supplementing one-way valve, the oil outlet of the oil supply device is connected with an inlet of the pressure reducing valve, and an outlet of the pressure reducing valve is connected with an oil inlet of the oil supplementing one-way valve; or,
in a preferred or optional embodiment, the oil supply path further includes an overflow path connected between an oil outlet of the oil supply device and an oil inlet of the oil supply check valve, an inlet of the oil drainage overflow valve is connected with the oil inlet of the oil supply check valve and the oil outlet of the oil supply device through the overflow path, and the oil drainage overflow valve is an electromagnetic overflow valve. The oil drainage overflow valve can also be realized by adopting other valves besides the electromagnetic overflow valve.
In a preferred or alternative embodiment, the normal working pressure of the pressure reducing valve or the electromagnetic spill valve is less than 1/2 of the hydraulic oil pressure when the rotating shaft of the hydraulic motor drives the reel to roll up the whole hose;
and the inlet pressure of the oil drainage overflow valve is not more than the outlet pressure of the pressure reducing valve.
In a preferred or optional embodiment, the hose follower device further includes an overload protection oil path, the overload protection oil path includes a protection overflow valve, an inlet of the protection overflow valve is connected to the oil path between the second oil port and the hydraulic oil port of the energy storage element, and an outlet of the protection overflow valve is connected to an oil tank.
The embodiment of the invention provides a hydraulic grab machine, which comprises a hydraulic grab body, a bucket body opening and closing oil cylinder, a rotary table and a hose follow-up device provided by any technical scheme of the invention, wherein:
one end of the hose is connected with an oil port of the opening and closing oil cylinder of the bucket body, and the other end of the hose is connected with an oil outlet end of a hydraulic oil source and/or an oil tank;
the energy storage element and/or the hydraulic energy conversion driving mechanism are/is arranged on the rotary table.
In a preferred or optional embodiment, the hydraulic grab machine further comprises a controller, a winch, a connecting rope, a reel rotation number detection device and a reel rotation number detection device, wherein the winch is connected with the hydraulic grab body through the connecting rope and can drive the hydraulic grab body to ascend through the connecting rope or release the hydraulic grab body to descend through the connecting rope;
the reel rotation turn number detection device is fixedly connected with the support and electrically connected with the controller, and the winding drum rotation turn number detection device is fixedly connected with the winding frame body and electrically connected with the controller;
the controller is used for obtaining the length of the hose released or coiled by the reel according to the rotating circle value of the reel detected by the reel rotating circle number detection device, obtaining the length of the connecting rope released or coiled by the reel according to the rotating circle number value of the reel detected by the reel rotating circle number detection device, and controlling the reel to stop acting when the length of the hose released by the reel is inconsistent with the length of the connecting rope released by the reel and/or the difference value between the length of the hose coiled by the reel and the length of the connecting rope coiled by the reel exceeds a preset range (controlling the winch motor to stop acting when the reel is driven by the winch motor).
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
because the hydraulic energy conversion driving mechanism in the hose follow-up device provided by the embodiment of the invention can convert the mechanical energy generated in the process of extending the hose into the hydraulic energy and then store the hydraulic energy in the energy storage element, and the hydraulic energy conversion driving mechanism can also receive the hydraulic energy released by the energy storage element and drive the hose to retract by utilizing the hydraulic energy, because the force for retracting the hose by the hydraulic energy conversion driving mechanism is converted from the mechanical energy generated in the process of extending the hose, the force can change along with the amount of the hydraulic energy in the energy storage element, when the hose extends out for the longest time, the hydraulic energy in the energy storage element is the most, the force for retracting the hose applied by the hydraulic energy conversion driving mechanism to the hose is the largest, when the hose extends for the shorter time, the hydraulic energy in the energy storage element is less, the force for retracting the hose applied by the hydraulic energy conversion driving mechanism is also smaller, and because the hydraulic energy conversion driving mechanism can not always apply the largest pulling force to the hose, no damage to the hose or damage to the hose is minimized, which improves the service life of the hose.
In the prior art, the structure of the energy storage element using a spring is heavy and complex, and once the spring force becomes small, all hoses cannot be lifted, and when the situation occurs, no standby scheme is available for continuous work. Therefore, according to the preferable technical scheme in the technical schemes provided by the invention, on one hand, the power loss is reduced by arranging the energy accumulator, and on the other hand, the oil supplementing oil way is arranged, so that when the energy stored by the energy accumulator is insufficient, the hose can be lifted manually through the oil supplementing oil way.
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 application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of the connection relationship between the main components of a hose follower according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection between the main components of another hose follower according to the embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the connection between the main components of a hydraulic grab machine according to an embodiment of the present invention;
reference numerals: 1. a hydraulic motor; 2. a support; 201. a reel encoder; 3. coiling; 4. a hose; 5. an energy storage element; 6. an oil-supplementing one-way valve; 7. a pressure reducing valve; 8. a diverter valve; 9. an oil drainage overflow valve; 10. an oil tank; 11. a filter; 12. a first check valve; 13. a second one-way valve; 14. protecting the overflow valve; 15. an electromagnetic spill valve; 20. a host; 21. hoisting; 22. a main hoisting encoder; 24. a turntable; 30. a hydraulic grab bucket body.
Detailed Description
The contents of the present invention and the differences between the present invention and the prior art can be understood with reference to fig. 1 to 3 and the text. The invention will now be described in further detail, including the preferred embodiments, with reference to the accompanying drawings, in which some alternative embodiments of the invention are shown. It should be noted that: any technical features and any technical solutions in the present embodiment are one or more of various optional technical features or optional technical solutions, and for the sake of brevity, this document cannot exhaustively enumerate all the alternative technical features and alternative technical solutions of the present invention, and is also not convenient for each embodiment of the technical features to emphasize it as one of various optional embodiments, so those skilled in the art should know that: any technical means provided by the invention can be replaced or any two or more technical means or technical characteristics provided by the invention can be combined with each other to obtain a new technical scheme. Any technical features and any technical solutions in the present embodiment do not limit the scope of the present invention, and the scope of the present invention should include any alternative technical solutions that can be conceived by those skilled in the art without inventive efforts and new technical solutions that can be obtained by those skilled in the art by combining any two or more technical means or technical features provided by the present invention with each other.
The embodiment of the invention provides a hose follow-up device which has small power loss, can lift a hose through manual operation of an oil supplementing oil way when the energy stored by an energy accumulator is insufficient, is not easy to damage the hose, has long service life and saves energy consumption, and a hydraulic grab machine provided with the hose follow-up device.
The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 3.
As shown in fig. 1 to fig. 3, the hose follower provided in the embodiment of the present invention includes an energy storage element (preferably an energy accumulator) 5, a hose 4, and a hydraulic energy conversion driving mechanism (which may include a hydraulic motor 1, an oil tank 10, a reel 3, and a bracket 2), wherein:
the hydraulic energy conversion driving mechanism is connected between the energy storage element 5 and the hose 4.
The hydraulic energy conversion driving mechanism can convert mechanical energy generated in the process of stretching the hose 4 into hydraulic energy and then store the hydraulic energy in the energy storage element 5, and the hydraulic energy conversion driving mechanism can also receive the hydraulic energy released by the energy storage element 5 and drive the hose 4 to be retracted by utilizing the hydraulic energy.
Because the hydraulic energy conversion driving mechanism in the hose follow-up device provided by the embodiment of the invention can convert the mechanical energy generated in the process of extending the hose 4 into the hydraulic energy and then store the hydraulic energy in the energy storage element 5, and the hydraulic energy conversion driving mechanism can also receive the hydraulic energy released by the energy storage element 5 and drive the hose 4 to retract by using the hydraulic energy, because the force for retracting the hose 4 by the hydraulic energy conversion driving mechanism is converted from the mechanical energy generated in the process of extending the hose 4, the magnitude of the force can change with the magnitude of the hydraulic energy in the energy storage element 5, when the hose 4 extends to the maximum extent, the hydraulic energy in the energy storage element 5 is the largest, the force for retracting the hose 4 applied by the hydraulic energy conversion driving mechanism to the hose 4 is the largest, when the hose 4 extends to a short extent, the hydraulic energy in the energy storage element 5 is less, and the force for retracting the hose 4 applied by the hydraulic energy conversion driving mechanism to the hose 4 is also smaller, since the hydraulic energy conversion driving mechanism does not always apply the maximum pulling force to the hose 4, the hose 4 is not damaged or the damage to the hose 4 is reduced to the minimum, and the service life of the hose 4 is prolonged.
As a preferred or alternative embodiment, the energy storage element 5 is preferably an energy accumulator, and the hydraulic energy conversion drive mechanism preferably comprises a hydraulic motor 1, a tank 10, a reel 3 and a stand 2, wherein:
the reel 3 is movably connected with the support 2, the reel 3 is connected with a rotating shaft of the hydraulic motor 1, and the reel 3 can drive the rotating shaft of the hydraulic motor 1 to rotate relative to the support 2. The spindle of the hydraulic motor 1 can also drive the reel 3 in rotation relative to the support 2.
The hydraulic motor 1 includes a first oil port and a second oil port, the first oil port is connected to the oil tank 10, and the second oil port is connected to the hydraulic oil port of the energy storage element 5.
When the rotating shaft rotates along the preset direction, the hydraulic oil sucked by the first oil port can be output from the second oil port, and the rotating shaft can also rotate along the reverse direction of the preset direction under the driving of the hydraulic oil input by the second oil port.
The hose 4 is wound around the reel 3 and one end of the hose 4 can extend outside the reel 3, and the other end of the hose 4 can be connected to a stationary member (preferably the oil outlet of a hydraulic oil source and/or the oil inlet of the oil tank 10) which is fixedly connected to the bracket 2, is of an integral construction, or remains relatively stationary.
When the energy storage element 5 is an energy accumulator, the power loss of the system can be reduced.
The hydraulic motor 1 is a bidirectional hydraulic motor, which can convert mechanical energy into hydraulic energy. When the rotating shaft of the hydraulic motor 1 drives the reel 3 to rotate relative to the support 2, the hose 4 can be wound and retracted by using the mechanical energy converted by the hydraulic energy, and on the contrary, when the rotating shaft of the hydraulic motor 1 driven by the reel 3 rotates relative to the support 2, the mechanical energy generated by releasing and extending the hose 4 can be converted into the hydraulic energy and stored in the energy storage element 5.
As a preferred or alternative embodiment, the oil inlet of the oil tank 10 is connected to the first oil port through a first check valve 12, and the oil outlet of the oil tank 10 is connected to the first oil port through a second check valve 13.
The first check valve 12 and the second check valve 13 can limit the oil outlet of the oil tank 10 to be only used for oil outlet, and the oil inlet of the oil tank 10 to be only used for oil inlet, so that it is ensured that the oil inlet of the oil tank 10 and the oil outlet of the oil tank 10 are not affected by each other. In the invention, a filter 11 can be arranged at the oil outlet of the oil tank 10 to prevent dirt and pollutants in the hydraulic oil from entering the hydraulic motor 1, so that the hydraulic motor 1 is protected.
As a preferred or optional implementation manner, the hose follower further includes an oil drainage path, and the oil drainage path includes a reversing valve (preferably a two-position two-way reversing valve) 8 and an oil drainage overflow valve 9, where: the drain relief valve 9 shown in fig. 1 may be a manually operated hydraulic valve, or may be an electromagnetic relief valve 15 shown in fig. 2.
The outlet of the oil drainage overflow valve 9 is connected with an oil tank (the oil tank can be the same as the oil tank 10 or different from the oil tank 10), the reversing valve 8 is connected to an oil path between the hydraulic oil port of the energy storage element 5 and the inlet of the oil drainage overflow valve 9, and the reversing valve 8 can control whether the oil path between the hydraulic oil port of the energy storage element 5 and the inlet of the oil drainage overflow valve 9 is communicated or not.
When the energy storage element 5 needs to be replaced, detected or maintained, the oil pressure in the energy storage element 5 needs to be reduced, and at the moment, the oil way between the hydraulic oil port of the energy storage element 5 and the inlet of the oil drainage overflow valve 9 can be controlled to be communicated through the reversing valve 8, so that the oil pressure in the energy storage element 5 is reduced in an oil drainage mode.
As a preferred or optional implementation manner, the hose follower further includes an oil supply path, and the oil supply path includes an oil supply device, and an oil outlet of the oil supply device is connected to the hydraulic oil port of the energy storage element 5 and the second oil port.
As a preferred or optional implementation manner, the oil supplementing oil path further includes an oil supplementing check valve 6, an oil outlet of the oil supplementing check valve 6 is connected to the hydraulic oil port and the second oil port of the energy storage element 5, and an oil outlet of the oil supply device is connected to an oil inlet of the oil supplementing check valve 6, wherein:
as shown in fig. 1, the oil supplementing oil path further includes a pressure reducing valve 7 connected between an oil outlet of the oil supply device and an oil inlet of the oil supplementing check valve 6, the oil outlet of the oil supply device is connected to an inlet of the pressure reducing valve 7, and an outlet of the pressure reducing valve 7 is connected to an oil inlet of the oil supplementing check valve 6; or, as a preferred or optional implementation manner, as shown in fig. 2, the oil supply path further includes an overflow path connected between the oil outlet of the oil supply device and the oil inlet of the oil supply check valve 6, and an inlet of an oil relief and overflow valve (which is preferably an electromagnetic overflow valve 15) is connected between the oil inlet of the oil supply check valve 6 and the oil outlet of the oil supply device through the overflow path. The oil drainage overflow valve can also be realized by adopting other valves besides the electromagnetic overflow valve.
The oil supplementing one-way valve 6 can prevent hydraulic oil stored in the energy storage element 5 from entering an oil outlet of the oil supply device to cause hydraulic energy loss.
The pressure reducing valve 7 or the electromagnetic overflow valve 15 is used for limiting the oil pressure of the hydraulic oil output by the oil supply device, ensuring that the hydraulic energy of the energy storage element 5 can be released as much as possible, and improving the energy utilization rate of the stored hydraulic energy.
The arrangement of the overflow oil way can fully utilize the electromagnetic overflow valve 15 as an oil drainage overflow valve to achieve the effect which can be realized by the pressure reducing valve 7.
In a preferred or alternative embodiment, the normal operating pressure of pressure reducing valve 7 or electromagnetic spill valve 15 is less than 1/2 of the hydraulic oil pressure when the shaft of hydraulic motor 1 is rotating reel 3 sufficiently to wind up all of hose 4. At this moment, the hydraulic energy released by the energy storage element 5 can be fully utilized to drive the hydraulic motor 1 to withdraw the pipeline, and excessive hydraulic oil output by an oil supply device is avoided.
In a preferred or alternative embodiment, the inlet pressure of the relief and overflow valve 9 is not greater than the outlet pressure of the pressure reducing valve 7. At this moment, when the energy storage element 5 can be replaced, detected or maintained, the oil pressure in the energy storage element 5 is reduced to a lower pressure value, so that the reliable operation of replacing, detecting or maintaining the energy storage element 5 is ensured.
Since the hydraulic energy converted from the mechanical energy generated in the process of extending the hose 4 is relatively limited and is not necessarily enough to retract the hose 4, an oil supplementing path is provided. The oil supplementing oil way has the following functions: on one hand, a certain back pressure is provided for the energy storage element 5, and the normal work of the energy storage element 5 is ensured; on the other hand, when the energy released from the energy storage element 5 is not enough to lift the hose 4 completely, the working pressure of the relief valve 7 or the electromagnetic relief valve 15 of the oil supply passage is adjusted to increase the oil pressure of the oil supply passage, so that the reel 3 is directly driven to recover the hose 4 through the oil supply passage. Therefore, even when the hose 4 cannot be automatically lifted, the lifting operation can be manually performed, and the grapple body 30 is not stopped in the groove due to the fact that the hose 4 cannot be lifted.
After the pressure of the pressure reducing valve 7 or the electromagnetic overflow valve 15 of the oil supplementing oil path is manually increased, the pressure in the energy storage element 5 is higher than the pressure set during normal work, and the energy storage element cannot directly work at the moment, otherwise, the energy storage element 5 cannot recover sufficient capacity in the next working period. At this time, the pressure of the pressure reducing valve 7 or the electromagnetic overflow valve 15 needs to be adjusted to a set pressure, and then the pressure is released to the energy storage element 5, that is, through the reversing valve 8 in the oil drainage oil path, after the reversing valve 8 is switched on, the pressure in the energy storage element 5 is consistent with the set pressure of the pressure reducing valve 7 or the electromagnetic overflow valve 15. So that the next duty cycle can proceed.
As a preferred or optional embodiment, the hose follower further includes an overload protection oil path, the overload protection oil path includes a protection overflow valve 14, an inlet of the protection overflow valve 14 is connected to the oil path between the second oil port and the hydraulic oil port of the energy storage element 5, and an outlet of the protection overflow valve 14 is connected to an oil tank (the oil tank may be the same as the oil tank 10 or a different oil tank from the oil tank 10). Protecting the overflow valve 14 can ensure the safety of the hydraulic system.
As shown in fig. 3, a hydraulic grab machine provided in an embodiment of the present invention includes a hydraulic grab body 30, a bucket body opening and closing cylinder, a turntable 24, and a hose follow-up device provided in any technical solution of the present invention, wherein:
one end of the hose 4 is connected with an oil port of the bucket body opening and closing oil cylinder, the end is preferably fixedly connected with the bucket body opening and closing oil cylinder, and the other end of the hose 4 is connected with an oil outlet end of a hydraulic oil source and/or an oil inlet of an oil tank (the oil tank can be the same as the oil tank 10 or different from the oil tank 10).
The energy storage element 5 and/or the hydraulic energy conversion drive mechanism are provided on the turntable 24. The energy storage element 5 and the hydraulic energy conversion drive mechanism are preferably both provided on the turntable 24. Of course, the energy storage element 5 and/or the hydraulic energy conversion drive mechanism may be provided at other locations on the main machine 20 than the turntable 24.
The hydraulic oil input into the bucket body opening and closing oil cylinder through the hose 4 can drive the bucket body opening and closing oil cylinder to switch between an opening state and a closing state, and the hydraulic oil required to be released in the switching process of the bucket body opening and closing oil cylinder can be input into an oil tank (the oil tank can be the same as the oil tank 10 or different from the oil tank 10) through the hose 4. When the energy storage element 5 and the hydraulic energy conversion driving mechanism are arranged on the main machine 20 of the hydraulic grab machine, the space of the arm support is not occupied, the weight of the arm support is increased, the safety maintenance is more convenient, and the stability of the hydraulic grab machine is improved.
As a preferred or optional embodiment, the hydraulic grab machine further includes a controller, a hoist 21, a connecting rope (preferably a steel wire rope), a reel rotation number detection device (preferably a reel encoder 201), and a drum rotation number detection device (preferably a main hoist encoder 22), wherein the drum of the hoist 21 is connected to the hydraulic grab body 30 through the connecting rope and can drive the hydraulic grab body 30 to ascend through the connecting rope or can release the hydraulic grab body 30 to descend through the connecting rope.
The reel rotation turn number detection device is fixedly connected with the support 2 and electrically connected with the controller, and the reel rotation turn number detection device is fixedly connected with the support body of the winch 21 and electrically connected with the controller.
The controller is used for obtaining the length of the hose 4 released or wound by the reel 3 according to the number of turns of the reel 3 detected by the reel rotation number detection device and obtaining the length of the connecting rope released or wound by the reel according to the number of turns of the reel 3 detected by the reel rotation number detection device, and controlling the reel stop action (controlling the winding motor stop action when the reel is driven by the winding motor) when the length of the hose 4 released by the reel 3 is inconsistent with the length of the connecting rope released by the reel and/or the difference value between the length of the hose 4 wound by the reel 3 and the length of the connecting rope wound by the reel exceeds a preset range.
Since the hydraulic grab body 30 and the hose 4 move synchronously, the extension or retraction length of the connection rope connecting the hydraulic grab body 30 and the hose 4 should be consistent, so if the extension or retraction length deviation of the two is large, the hose 4 is likely to be wound or accumulated, at this time, if the hydraulic grab body 30 continues to act, the hose 4 is likely to be extruded to damage the hose 4, and therefore, when the length of the hose 4 released by the reel 3 is inconsistent with the length of the connection rope released by the reel and/or the difference between the length of the hose 4 wound up by the reel 3 and the length of the connection rope wound up by the reel exceeds a predetermined range, the reel stop action (the winding motor stop action when the reel is driven by the winding motor) is controlled, the damage of the hose 4 due to extrusion can be avoided, and the construction safety is ensured.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. A hose follower device, comprising an energy storage element (5), a hose (4) and a hydraulic energy conversion drive mechanism, wherein:
the hydraulic energy conversion driving mechanism is connected between the energy storage element (5) and the hose (4);
the hydraulic energy conversion driving mechanism can convert mechanical energy generated in the process that the hose (4) extends out into hydraulic energy and then store the hydraulic energy in the energy storage element (5), and can also receive the hydraulic energy released by the energy storage element (5) and drive the hose (4) to retract by utilizing the hydraulic energy;
the energy storage element (5) is an energy accumulator, the hydraulic energy conversion driving mechanism comprises a hydraulic motor (1), an oil tank (10), a reel (3) and a support (2), wherein:
the reel (3) is movably connected with the support (2), the reel (3) is connected with a rotating shaft of the hydraulic motor (1), the reel (3) can drive the rotating shaft of the hydraulic motor (1) to rotate relative to the support (2), and the rotating shaft of the hydraulic motor (1) can drive the reel (3) to rotate relative to the support (2);
the hydraulic motor (1) comprises a first oil port and a second oil port, the first oil port is connected with the oil tank (10), and the second oil port is connected with a hydraulic oil port of the energy storage element (5);
when the rotating shaft rotates along a preset direction, the hydraulic oil sucked by the first oil port can be output from the second oil port, and the rotating shaft can also rotate along the reverse direction of the preset direction under the driving of the hydraulic oil input by the second oil port;
the hose (4) is wound on the reel (3), one end of the hose (4) extends out of the reel (3), and the other end of the hose (4) is connected with the oil outlet end of the hydraulic oil source.
2. The hose follower device according to claim 1, wherein an oil inlet of the oil tank is connected to the first oil port through a first check valve, and an oil outlet of the oil tank is connected to the first oil port through a second check valve.
3. The hose follower arrangement of claim 1 further comprising an oil drainage circuit including a reversing valve and an oil drainage relief valve, wherein:
the outlet of the oil drainage overflow valve is connected with the oil tank, the reversing valve is connected to an oil path between a hydraulic oil port of the energy storage element and the inlet of the oil drainage overflow valve, and the reversing valve can control whether the oil path between the hydraulic oil port of the energy storage element and the inlet of the oil drainage overflow valve is communicated or not.
4. The hose servo device according to claim 3, further comprising an oil supply passage, wherein the oil supply passage comprises an oil supply device, and an oil outlet of the oil supply device is connected to the hydraulic oil port of the energy storage element and the second oil port.
5. The hose servo device according to claim 4, wherein the oil supply path further comprises an oil supply check valve, an oil outlet of the oil supply check valve is connected to the hydraulic oil port of the energy storage element and the second oil port, an oil outlet of the oil supply device is connected to an oil inlet of the oil supply check valve, and wherein:
the oil supplementing oil way also comprises a pressure reducing valve connected between an oil outlet of the oil supply device and an oil inlet of the oil supplementing one-way valve, the oil outlet of the oil supply device is connected with an inlet of the pressure reducing valve, and an outlet of the pressure reducing valve is connected with an oil inlet of the oil supplementing one-way valve; or,
the oil supplementing oil way further comprises an overflow oil way connected between the oil outlet of the oil supply device and the oil inlet of the oil supplementing one-way valve, the inlet of the oil drainage overflow valve is connected with the oil inlet of the oil supplementing one-way valve and the oil outlet of the oil supply device through the overflow oil way, and the oil drainage overflow valve is an electromagnetic overflow valve.
6. The hose follower as defined in claim 5, wherein the normal operating pressure of the pressure reducing valve or the electromagnetic spill valve is less than 1/2 of the hydraulic oil pressure when the rotating shaft of the hydraulic motor drives the reel enough to roll up the entire hose;
and the inlet pressure of the oil drainage overflow valve is not more than the outlet pressure of the pressure reducing valve.
7. The hose follower device according to claim 1, further comprising an overload protection oil path, wherein the overload protection oil path comprises a protection overflow valve, an inlet of the protection overflow valve is connected to the oil path between the second oil port and the hydraulic oil port of the energy storage element, and an outlet of the protection overflow valve is connected to an oil tank.
8. A hydraulic grab machine comprising a hydraulic grab body, a bucket body opening and closing cylinder, a turntable, and the hose follow-up device of any one of claims 1 to 7, wherein:
one end of the hose is connected with an oil port of the opening and closing oil cylinder of the bucket body, and the other end of the hose is connected with an oil outlet end of a hydraulic oil source and/or an oil tank;
the energy storage element and/or the hydraulic energy conversion driving mechanism are/is arranged on the rotary table.
9. The hydraulic grab machine of claim 8, further comprising a controller, a winch, a connecting rope, a reel rotation number detection device, and a reel rotation number detection device, wherein the winch reel is connected to the hydraulic grab body through the connecting rope and can drive the hydraulic grab body to ascend through the connecting rope or release the hydraulic grab body to descend through the connecting rope;
the reel rotation turn number detection device is fixedly connected with the support and electrically connected with the controller, and the winding drum rotation turn number detection device is fixedly connected with the winding frame body and electrically connected with the controller;
the controller is used for obtaining the length of the hose released or coiled by the reel according to the rotating circle number value of the reel detected by the reel rotating circle number detection device, obtaining the length of the connecting rope released or coiled by the reel according to the rotating circle number value of the reel detected by the reel rotating circle number detection device, and controlling the reel to stop acting when the length of the hose released by the reel is inconsistent with the length of the connecting rope released by the reel and/or the difference value between the length of the hose coiled by the reel and the length of the connecting rope coiled by the reel exceeds a preset range.
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| CN203834555U (en) * | 2014-03-26 | 2014-09-17 | 徐工集团工程机械股份有限公司 | Hose follow-up device and hydraulic grab machine |
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| JP2921368B2 (en) * | 1993-11-15 | 1999-07-19 | 株式会社大林組 | Excavator |
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| CN201835304U (en) * | 2010-08-12 | 2011-05-18 | 徐州徐工基础工程机械有限公司 | Automatic control system for pressing and rolling pipe of continuous wall grab bucket |
| CN202865900U (en) * | 2012-08-28 | 2013-04-10 | 北京南车时代机车车辆机械有限公司 | Continuous wall grab bucket and hydraulic system of hose reel thereof |
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