CN214141294U - Upper limiting system of lifting hook - Google Patents
Upper limiting system of lifting hook Download PDFInfo
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- CN214141294U CN214141294U CN202022706006.4U CN202022706006U CN214141294U CN 214141294 U CN214141294 U CN 214141294U CN 202022706006 U CN202022706006 U CN 202022706006U CN 214141294 U CN214141294 U CN 214141294U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 230000006698 induction Effects 0.000 claims abstract description 11
- 235000014121 butter Nutrition 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 74
- 239000010720 hydraulic oil Substances 0.000 description 21
- 230000003116 impacting effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The utility model provides a limiting system on a lifting hook, which comprises a mechanical part and a hydraulic system, wherein the mechanical part comprises a heavy hammer and a steel wire rope lifting hook component, the heavy hammer is provided with a proximity switch, a steel wire rope of the steel wire rope lifting hook component passes through the heavy hammer, and the steel wire rope lifting hook component is provided with an induction block matched with the proximity switch; hydraulic system includes the oil tank, the oil pump, multichannel valves and winch system, the input of oil pump is connected to the oil tank, be equipped with oil return line on the oil tank, the output of oil pump links to each other with multichannel valves, winch system links to each other with multichannel valves, multichannel valves still links to each other with oil return line of oil tank, this scheme uses proximity switch, then the operation that the proximity switch on the weight that only needs to be close to the response piece can stop winch system, the response piece does not contact with the weight, the butter can not be with both adhesions like this, thereby prevent that response piece and weight from being leaded to out of control and damaging structure or hydraulic system by the butter adhesion.
Description
Technical Field
The utility model relates to a hoist technical field, concretely relates to spacing system on lifting hook.
Background
Generally, a heavy hammer is arranged between a suspension arm of a crane and a lifting hook and used for assisting in controlling the stop position of the lifting hook, and the conventional scheme is that a travel switch is arranged on the heavy hammer, the lifting hook moves upwards to push an induction block on the lifting hook upwards, the induction block moves upwards to be in contact with the travel switch, the travel switch sends a signal, and a PLC stops the action of the lifting hook; this kind of setting, the response piece does not follow wire rope and removes, uses for a long time, and the butter on the wire rope can accumulate between response piece and weight, accumulates to certain amount when the butter, after response piece and weight contact, under the butter adhesion effect, the response piece can't separate with the weight, leads to travel switch to be acting on always to lead to unable accurate control lifting hook to stop, and then damage structure or hydraulic system.
Disclosure of Invention
For solving the problem that exists among the prior art, the utility model provides a spacing system on lifting hook solves the spacing travel switch on the hoist weight and is leaded to becoming invalid and damage structure or hydraulic system because of response piece and weight are by the butter adhesion.
In order to achieve the above purpose, the technical scheme of the utility model is that: a kind of upper limit system of lifting hook, including mechanical part and hydraulic system, the mechanical part includes weight hammer and wire rope hook assembly, there are proximity switches on the weight hammer, the wire rope of the wire rope hook assembly passes the weight hammer, there are induction blocks cooperating with proximity switch on the wire rope hook assembly;
the hydraulic system comprises an oil tank, an oil pump, a multi-way valve bank and a winch system, wherein the input end of the oil pump is connected to the oil tank, an oil return pipeline is arranged on the oil tank, the output end of the oil pump is connected with the multi-way valve bank, the winch system is connected with the multi-way valve bank, and the multi-way valve bank is also connected with the oil return pipeline of the oil tank;
the multi-way valve group comprises a three-position seven-way manual control reversing valve, a two-position two-way electromagnetic ball valve I, a two-position two-way electromagnetic ball valve II, a shuttle valve I, a shuttle valve II and a pilot overflow valve; the three-position seven-way manual-electric control reversing valve comprises an opening A, an opening B, an opening C, an opening D, an opening E, an opening F and an opening G, the opening B is connected with the output end of the oil pump, and the input end of the pilot overflow valve is connected with the output end of the oil pump; the port A is connected with an oil return pipeline; the port C is connected with an oil return pipeline; the port D is connected with a first input end of a first shuttle valve, an output end of the first shuttle valve is connected with a second input end of a second shuttle valve, an output end of the second shuttle valve is connected with a control end of a pilot overflow valve, a first input end of the first shuttle valve is connected with an input end of a first two-position two-way electromagnetic ball valve, and an output end of the first two-position two-way electromagnetic ball valve is connected with an oil return pipeline; the output end of the pilot overflow valve is connected with an oil return pipeline; the port E is connected with one end of a winch system; the port F is connected with the other end of the winch system; the G port is connected with the second input end of the first shuttle valve, and the second input end of the first shuttle valve is also connected with the input end of the second two-position two-way electromagnetic ball valve; and the output end of the two-position two-way electromagnetic ball valve II is connected with an oil return pipeline.
The arrangement is that when the three-position seven-way flashlight is operated to control the reversing valve to the left position, the oil pump is started, one path of hydraulic oil flows from the port B to the port E to drive the winch system to work, the other path of hydraulic oil flows from the port B to the port D to flow to the first input end of the shuttle valve I, because the oil path of the two-position two-way electromagnetic ball valve I in a normal power-on state is closed, the hydraulic oil does not flow through the two-position two-way electromagnetic ball valve I, the hydraulic oil flows to the shuttle valve II after passing through the shuttle valve I, flows out from the output end of the shuttle valve II and is communicated with the control end of the pilot type overflow valve, the pilot type overflow valve is closed, when the winch system continues to work, the tackle rises through the steel wire rope, when an induction block on the tackle enters the induction range of the proximity switch, the proximity switch sends a signal, the two-position two-way electromagnetic ball valve I loses power, the oil path of the two-position two-way electromagnetic ball valve I is opened, the control hydraulic oil flowing from the port B to the port D directly flows from the shuttle valve I to the oil return tank, then the control end of guide's overflow valve does not have the oil pressure, the guide's overflow valve is opened, the output of oil pump forms the passageway with returning oil pipe, hydraulic oil directly returns the oil tank through guide's overflow valve, even continue to operate like this and rise the handle, the winch system can not do yet and rise the action, thereby reach spacing purpose, this scheme uses proximity switch, then the operation that the proximity switch on the response piece only need be close to the weight can stop the winch system, the response piece does not contact with the weight, the butter can not be with both adhesions like this, thereby prevent that response piece and weight from being led to the switch inefficacy and damage structure or hydraulic system by the butter adhesion.
Further, the cross section of the heavy hammer is circular; the number of the proximity switches is two, and the two proximity switches are symmetrically arranged relative to the vertical center line of the heavy hammer.
With the structure, the heavy hammer with the circular cross section is easy to process; two proximity switches are symmetrically arranged to be redundant with each other, so that the limit double insurance is ensured, and the limit function is realized more safely and reliably.
Furthermore, a hydraulic control one-way valve is arranged between the output end of the oil pump and the three-position seven-way manual control reversing valve, the input end of the hydraulic control one-way valve is connected with the output end of the oil pump, the output end of the hydraulic control one-way valve is connected with the port B of the three-position seven-way manual control reversing valve, and the control end of the hydraulic control one-way valve is connected with the right input end of the shuttle valve II.
The hydraulic control one-way valve is arranged, the three-position seven-way manual control reversing valve can be protected, high-pressure hydraulic oil is prevented from directly impacting the three-position seven-way manual control reversing valve, and pressure between the output end of the oil pump and the oil inlet end of the three-position seven-way manual control reversing valve can be balanced.
Furthermore, an overflow valve is arranged between the first input end of the first shuttle valve and the oil return pipeline, and the overflow valve is arranged at the position to control the pressure of the hydraulic oil flowing through the shuttle valve.
Furthermore, a pressure reducing valve and a sequence valve are sequentially arranged between the input end of the pilot overflow valve and the oil return pipeline, and the pressure reducing valve is arranged to reduce the oil pressure flowing through the pilot overflow valve and protect the pilot overflow valve; the sequence valve is an internal control internal release sequence valve and is used as a back pressure valve, so that the pressure of an oil line is stable.
Furthermore, a pressure gauge is arranged between the input end of the pilot overflow valve and the input end of the pressure reducing valve through a quick-change connector with a check valve, the arrangement can ensure that the oil way is blocked by the check valve before the pressure gauge is replaced and detached, leakage is prevented, quick replacement is realized, and the pressure gauge can visually display the oil pressure in the oil way.
Drawings
FIG. 1 is a schematic structural view of a mechanical part of the present invention;
FIG. 2 is an enlarged view at Y in FIG. 1;
FIG. 3 is a schematic diagram of a hydraulic system according to the present invention;
FIG. 4 is an enlarged view at W in FIG. 3;
fig. 5 is a schematic view of each interface of the three-position seven-way manual-electric control reversing valve of the utility model.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 5, an upper hook restraint system includes a mechanical portion and a hydraulic system.
The mechanical part comprises a heavy hammer 11 and a steel wire rope hook component 12, wherein the heavy hammer 11 is provided with two proximity switches 111, in the embodiment, the steel wire rope hook component comprises a tackle 112 and a steel wire rope 113, the steel wire rope 113 penetrates through the heavy hammer 11, the tackle 112 is provided with a sensing surface matched with the proximity switches 111, in the embodiment, the tackle 112 is provided with a sensing block 114, and the proximity switches 111 are matched with the sensing block 114.
Hydraulic system includes oil tank 20, oil pump 21, multichannel valves and winch system 23, and oil pump 21's input is connected to oil tank 20, is equipped with back oil pipe way 24 on the oil tank 20, and oil pump output end 211 links to each other with the multichannel valves, and winch system 23 links to each other with the multichannel valves, and the multichannel valves still links to each other with oil tank 20's back oil pipe way 24.
The multi-way valve group comprises a three-position seven-way manual control reversing valve 22, a two-position two-way electromagnetic ball valve I25, a two-position two-way electromagnetic ball valve II 26, a shuttle valve I27, a shuttle valve II 28 and a pilot overflow valve 29; the three-position seven-way manual-electric control reversing valve 22 comprises a port A, a port B, a port C, a port D, a port E, a port F and a port G, the port B is connected with the output end of the oil pump 21, and the input end of the pilot overflow valve 29 is connected with the output end of the oil pump 21; the port A is connected with an oil return pipeline 24; the port C is connected with an oil return pipeline 24; the port D is connected with a first input end 271 of a first shuttle valve 27, the output end of the first shuttle valve 27 is connected with a right input end 282 of a second shuttle valve 28, the output end of the second shuttle valve 28 is connected with the control end of the pilot overflow valve 29, the first input end 271 of the first shuttle valve 27 is connected with the input end of a first two-position two-way electromagnetic ball valve, and the output end of the first two-position two-way electromagnetic ball valve is connected with the oil return pipeline 24; the output end of the pilot overflow valve 29 is connected with the oil return pipeline 24; the port E is connected with one end of a winch system 23; the port F is connected with the other end of the winch system 23; the G port is connected with a second input end 272 of the first shuttle valve 27, and the second input end 272 of the first shuttle valve 27 is also connected with an input end of the second two-position two-way electromagnetic ball valve 26; the output end of the two-position two-way electromagnetic ball valve II 26 is connected with an oil return pipeline.
In the scheme, the cross section of the heavy hammer 11 is circular; the number of the proximity switches 111 is two, the two proximity switches 111 are symmetrically arranged relative to the vertical center line of the heavy hammer 11, and the heavy hammer with a circular cross section is easy to process; two proximity switches are symmetrically arranged to be redundant, and when one proximity switch is sensed, the limiting can be achieved, so that the limiting double insurance is guaranteed, and the limiting function is achieved more safely and reliably.
A hydraulic control one-way valve 31 is arranged between the output end 211 of the oil pump and the three-position seven-way manual control reversing valve 22, the input end of the hydraulic control one-way valve 31 is connected with the output end 211 of the oil pump, the output end 31 of the hydraulic control one-way valve is connected with the port B of the three-position seven-way manual control reversing valve 22, the control end of the hydraulic control one-way valve 31 is connected with the right input end 282 of the second shuttle valve 28, the hydraulic control one-way valve 31 is arranged to protect the three-position seven-way manual control reversing valve 22, high-pressure hydraulic oil is prevented from directly impacting the three-position seven-way manual control reversing valve 22, and pressure between the output end of the oil pump and the oil inlet end of the three-position seven-way manual control reversing valve can be balanced.
A relief valve 32 is provided between the first input 271 of the first shuttle valve and the return line 24, where the relief valve 32 is provided to control the pressure of the hydraulic oil flowing through both shuttle valves.
A pressure reducing valve 33 and a sequence valve 34 are sequentially arranged between the input end of the pilot overflow valve 29 and the oil return pipeline 24, and the pressure reducing valve 33 is arranged to reduce the oil pressure flowing through the pilot overflow valve 29 and protect the pilot overflow valve 29; the sequence valve 34 provided here is an internal control internal relief sequence valve, and is used as a back pressure valve to stabilize the oil line pressure.
When the three-position seven-way manual control reversing valve 22 is operated to the left, the oil pump 21 is started, hydraulic oil enters the three-position seven-way manual control reversing valve 22 through the hydraulic control one-way valve 31 and the port B of the three-position seven-way manual control reversing valve 22, one path of hydraulic oil flows from the port B to the port E to drive the winch system to work, return oil of the winch system leaves the port C from the port F and then enters the oil return pipeline 24 and enters an oil tank, the induction block 114 rises along with a lifting hook, the other path of hydraulic oil controls the hydraulic oil to flow from the port B to the port D and flow to the first input end 271 of the first shuttle valve, because the oil path of the first two-position two-way electromagnetic ball valve 25 in a normal power-on state is closed, the hydraulic oil does not flow through the oil return tank of the first two-position two-way electromagnetic ball valve 25, the hydraulic oil flows to the second shuttle valve 28 after passing through the first shuttle valve 27 and flows out from the output end of the second shuttle valve 28 to be communicated with the control end of the pilot type overflow valve 29, and the pilot type overflow valve 29 is closed, the hydraulic oil can not return to the oil tank through the pilot overflow valve 29, when the winch system continues to work, the induction block 114 continues to ascend along with the lifting hook, when the induction block 114 enters the induction range of the proximity switch 111, the proximity switch 111 sends a signal, the two-position two-way electromagnetic ball valve I25 loses power, the oil path of the two-position two-way electromagnetic ball valve I25 is opened, the control hydraulic oil flowing from the port B to the port D directly returns to the oil tank from the two-position two-way electromagnetic ball valve I25 without passing through the shuttle valve I27, the control end of the pilot overflow valve 29 has no oil pressure, the pilot overflow valve 29 is opened, the output end of the oil pump forms a passage with an oil return pipeline, the hydraulic oil does not pass through the hydraulic control one-way valve 31 but directly returns to the oil tank through the pilot overflow valve 29, so that even if the lifting handle is continuously operated, the winch system can not lift, the purpose of limiting is achieved, and the three-position seven-way flashlight control reversing valve 22 is operated to the right position, the mode is the same as the mode that moves to the left position, the winch descends, when not operating three-position seven-way flashlight control reversing valve 22, the B end of hydraulic control check valve 31 is sealed, because the control end of pilot overflow valve 29 does not have hydraulic oil, thereby pilot overflow valve 29 opens, thereby hydraulic oil and the direct time return tank of pilot overflow valve 29, this scheme uses proximity switch, then the operation of winch system can be stopped to the proximity switch that the response piece only need be close to on the weight, the response piece does not contact with the weight, the butter can not be with both adhesions like this, thereby prevent that the winch from continuing to receive the rope and cause structure or hydraulic system's damage.
Claims (6)
1. The utility model provides a spacing system on lifting hook, includes mechanical part and hydraulic system, and mechanical part includes weight and wire rope lifting hook subassembly, its characterized in that: a proximity switch is arranged on the heavy hammer, a steel wire rope of the steel wire rope hook component penetrates through the heavy hammer, and an induction block matched with the proximity switch is arranged on the steel wire rope hook component;
the hydraulic system comprises an oil tank, an oil pump, a multi-way valve bank and a winch system, wherein the input end of the oil pump is connected to the oil tank, an oil return pipeline is arranged on the oil tank, the output end of the oil pump is connected with the multi-way valve bank, the winch system is connected with the multi-way valve bank, and the multi-way valve bank is also connected with the oil return pipeline of the oil tank;
the multi-way valve group comprises a three-position seven-way manual control reversing valve, a two-position two-way electromagnetic ball valve I, a two-position two-way electromagnetic ball valve II, a shuttle valve I, a shuttle valve II and a pilot overflow valve; the three-position seven-way manual-electric control reversing valve comprises an opening A, an opening B, an opening C, an opening D, an opening E, an opening F and an opening G, the opening B is connected with the output end of the oil pump, and the input end of the pilot overflow valve is connected with the output end of the oil pump; the port A is connected with an oil return pipeline; the port C is connected with an oil return pipeline; the port D is connected with a first input end of a first shuttle valve, an output end of the first shuttle valve is connected with a second input end of a second shuttle valve, an output end of the second shuttle valve is connected with a control end of a pilot overflow valve, a first input end of the first shuttle valve is connected with an input end of a first two-position two-way electromagnetic ball valve, and an output end of the first two-position two-way electromagnetic ball valve is connected with an oil return pipeline; the output end of the pilot overflow valve is connected with an oil return pipeline; the port E is connected with one end of a winch system; the port F is connected with the other end of the winch system; the G port is connected with the second input end of the first shuttle valve, and the second input end of the first shuttle valve is also connected with the input end of the second two-position two-way electromagnetic ball valve; and the output end of the two-position two-way electromagnetic ball valve II is connected with an oil return pipeline.
2. A hook upper limit system as claimed in claim 1, wherein: the cross section of the heavy hammer is circular; the number of the proximity switches is two, and the two proximity switches are symmetrically arranged relative to the vertical center line of the heavy hammer.
3. A hook upper limit system as claimed in claim 1, wherein: and a hydraulic control one-way valve is arranged between the output end of the oil pump and the three-position seven-way manual control reversing valve, the input end of the hydraulic control one-way valve is connected with the output end of the oil pump, the output end of the hydraulic control one-way valve is connected with the port B of the three-position seven-way manual control reversing valve, and the control end of the hydraulic control one-way valve is connected with the right input end of the shuttle valve II.
4. A hook upper limit system as claimed in claim 1, wherein: an overflow valve is arranged between the first input end of the first shuttle valve and the oil return pipeline.
5. A hook upper limit system as claimed in claim 1, wherein: a pressure reducing valve and a sequence valve are sequentially arranged between the input end of the pilot overflow valve and the oil return pipeline.
6. A hook upper limit system as claimed in claim 5, wherein: a pressure gauge is arranged between the input end of the pilot overflow valve and the input end of the pressure reducing valve through a quick-change connector with a one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022706006.4U CN214141294U (en) | 2020-11-20 | 2020-11-20 | Upper limiting system of lifting hook |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022706006.4U CN214141294U (en) | 2020-11-20 | 2020-11-20 | Upper limiting system of lifting hook |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214141294U true CN214141294U (en) | 2021-09-07 |
Family
ID=77566104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022706006.4U Expired - Fee Related CN214141294U (en) | 2020-11-20 | 2020-11-20 | Upper limiting system of lifting hook |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214141294U (en) |
-
2020
- 2020-11-20 CN CN202022706006.4U patent/CN214141294U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210907 |