CN105003496A - Electricity approaching warning device for special vehicle - Google Patents
Electricity approaching warning device for special vehicle Download PDFInfo
- Publication number
- CN105003496A CN105003496A CN201510493052.1A CN201510493052A CN105003496A CN 105003496 A CN105003496 A CN 105003496A CN 201510493052 A CN201510493052 A CN 201510493052A CN 105003496 A CN105003496 A CN 105003496A
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- Prior art keywords
- valve
- oil cylinder
- communicated
- hydraulic fluid
- fluid port
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
- F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
- F16P3/147—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using electro-magnetic technology, e.g. tags or radar
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
Abstract
The invention discloses an electricity approaching warning device for a special vehicle, and belongs to the technical field of warning devices. The electricity approaching warning device comprises a power source, an audible and visual alarm device, a telescopic oil cylinder communicated with the power source and driven by the power source, a magnetic field intensity detection device arranged at the free end of the piston rod of the telescopic oil cylinder, and a controller electrically connected with the power source and used for controlling the power source to start or stop, wherein the power source and the audible and visual alarm device are mounted on the special vehicle; the audible and visual alarm device and the magnetic field intensity detection device are electrically connected with the controller. The special vehicle is arranged with the power source to drive the telescopic oil cylinder to move, the magnetic field intensity detection device is further driven to extend or withdraw to detect the electromagnetic field intensity around the operation area, and the detected magnetic field intensity signal is fed back to the controller; when the magnetic field intensity reaches a threshold, the audible and visual alarm device gives an alarm under the control of the controller, so as to remind staff to notice the position of a danger area. Therefore, the safety of electricity operation is improved.
Description
Technical field
The present invention relates to warning device technical field, particularly relate to a kind of special vehicle Antistatic alarm.
Background technique
When using large special vehicle equipment (as crane, pump truck, excavator etc.) to carry out operation in line protection district; operator and commanding often easily ignore the safe distance between electric transmission line; to such an extent as to the spacing between equipment and wire is surmount safe distance time; produce electric discharge phenomena; thus cause the power grid accidents such as broken string, tower; construction equipment is damaged, even occurs personal injury.
Summary of the invention
In order to solve the problem of prior art, embodiments provide a kind of special vehicle Antistatic alarm, technological scheme is as follows:
Embodiments provide a kind of special vehicle Antistatic alarm, described special vehicle Antistatic alarm comprises the power source be arranged on special vehicle, acoustic-optic alarm, be communicated with described power source and the telescopic oil cylinder driven by described power source, be arranged on the magnetic intensity detection device on the piston rod free end of described telescopic oil cylinder, be electrically connected with described power source and control the controller that described power source starts or close, described acoustic-optic alarm and described magnetic intensity detection device are electrically connected with described controller respectively.
Further, described special vehicle Antistatic alarm also comprises three-position four-way electromagnetic directional valve and the first electromagnetic switch valve, first hydraulic fluid port of described three-position four-way electromagnetic directional valve is communicated with the oil outlet of described power source, second hydraulic fluid port of described three-position four-way electromagnetic directional valve is communicated with the filler opening of described first electromagnetic switch valve, the oil outlet of described first electromagnetic switch valve is communicated with the rod chamber of described telescopic oil cylinder, the rodless cavity of described telescopic oil cylinder is communicated with the 3rd hydraulic fluid port of described three-position four-way electromagnetic directional valve, 4th hydraulic fluid port of described three-position four-way electromagnetic directional valve is communicated with the return opening of described power source.
Further, described special vehicle Antistatic alarm also comprises the claw oil cylinder of the piston rod free end being arranged on described telescopic oil cylinder, the second electromagnetic switch valve and the claw by described claw hydraulic oil cylinder driving, the filler opening of described second electromagnetic switch valve is communicated with the second hydraulic fluid port of described three-position four-way electromagnetic directional valve, the oil outlet of described second electromagnetic switch valve is communicated with the rod chamber of described claw oil cylinder, and the rodless cavity of described claw oil cylinder is communicated with the 3rd hydraulic fluid port of described three-position four-way electromagnetic directional valve.
Further, also comprise square box frame plate and balladeur train, on the main body two side being fixed on square box frame plate relative to the piston rod of described telescopic oil cylinder of described claw oil cylinder, the side of the stationary jaw oil cylinder of described square box frame plate is also provided with fixed plate, the bearing of trend of described fixed plate is parallel with the bearing of trend of the piston rod of described claw oil cylinder, described claw comprises left mechanical arm and right mechanical arm, all to be hinged in the middle part of described left mechanical arm and described right mechanical arm on fixed plate and to be oppositely arranged, one end of described left mechanical arm and described right mechanical arm is all slidably mounted in described balladeur train, the middle part of described balladeur train is fixedly connected with the piston rod free end of described claw oil cylinder.
Further, described magnetic intensity detection device is fixed on the outer side wall of described square box frame plate, and described magnetic intensity detection device is arranged near the piston rod free end of described claw oil cylinder.
Further, also comprise the first equilibrium valve and the second equilibrium valve, described first equilibrium valve and the second equilibrium valve keep when the first state often opening, the throttling supercharging when the second state of described first equilibrium valve and the second equilibrium valve, first hydraulic fluid port of described first equilibrium valve is communicated with the second hydraulic fluid port of described three-position four-way electromagnetic directional valve, second hydraulic fluid port of described first equilibrium valve is communicated with the filler opening of described first electromagnetic switch valve, the control port of described first equilibrium valve is communicated with the first hydraulic fluid port of described second equilibrium valve, second hydraulic fluid port of described second equilibrium valve respectively with telescopic oil cylinder, the rodless cavity of claw oil cylinder is communicated with, the control port of described second equilibrium valve is communicated with the first hydraulic fluid port of described first equilibrium valve.
Further, also comprise the first traveller, first one-way valve, second traveller and the second one-way valve, one end of described first traveller extends in the control port of described first equilibrium valve, the other end of described first traveller and one end of the first one-way valve are tightly connected, the other end of described first one-way valve is communicated with the first hydraulic fluid port of the second equilibrium valve, one end of described second traveller extends in the control port of described second equilibrium valve, the other end of described second traveller and one end of the second one-way valve are tightly connected, the other end of described second one-way valve is communicated with the first hydraulic fluid port of the first equilibrium valve.
Further, also comprise the first filter between the first hydraulic fluid port being arranged on described first one-way valve and described second equilibrium valve, and the second filter between the first hydraulic fluid port being arranged on described second one-way valve and described first equilibrium valve.
Further, be also provided with the display screen for showing the real-time distance of current magnetic field intensity and special vehicle and high voltage magnetic field in described special vehicle, described display screen is electrically connected with described controller.
The beneficial effect of the technological scheme that the embodiment of the present invention provides is:
By arranging power source to drive telescopic oil cylinder movable on special vehicle, and then drive magnetic intensity detection device stretch out or regain with the electromagnetic field intensity detected near operating area, the magnetic field intensity signal detected feeds back to controller, when magnetic intensity reaches threshold value, controller controls acoustic-optic alarm and reports to the police, to remind the position of staff deathtrap, improve the Security of electric operating.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the hydraulic schematic diagram of the special vehicle Antistatic alarm that the embodiment of the present invention provides;
Fig. 2 is the circuit connection diagram of the special vehicle Antistatic alarm that the embodiment of the present invention provides;
Fig. 3 is the partial device structures figure of the special vehicle Antistatic alarm that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment
As shown in Fig. 1 ~ 3, embodiments provide a kind of special vehicle Antistatic alarm, this special vehicle Antistatic alarm comprises the power source 1 be arranged on special vehicle, acoustic-optic alarm 2, be communicated with power source 1 and the telescopic oil cylinder 3 driven by power source 1, be arranged on the magnetic intensity detection device 4 on the piston rod free end of telescopic oil cylinder 3, be electrically connected with power source 1 and control the controller 5 that power source 1 starts or close, acoustic-optic alarm 2 and magnetic intensity detection device 4 are electrically connected with controller 5 respectively.
Particularly, power source 1 can be hydraulic oil container and oil pump, oil pump is controlled to open with oil transportation by controller 5, the structure of acoustic-optic alarm 2 and magnetic intensity detection device 4 is known for those skilled in the art, do not repeat them here, special vehicle is behind electric operating place, control power source 1 by controller 5 to open to drive telescopic oil cylinder 3 to stretch out, the magnetic intensity detection device 4 of telescopic oil cylinder 3 piston rod free end starts the magnetic intensity detected in real time near operating area, and magnetic field intensity signal is fed back to controller 5, carry out analysis by controller 5 to contrast, when magnetic intensity reaches threshold value, controller 5 controls acoustic-optic alarm 2 and gives the alarm.
Further, this special vehicle Antistatic alarm also comprises three-position four-way electromagnetic directional valve 6 and the first electromagnetic switch valve 7, first hydraulic fluid port 6a of three-position four-way electromagnetic directional valve 6 is communicated with the oil outlet 1a of power source 1, second hydraulic fluid port 6b of three-position four-way electromagnetic directional valve 6 is communicated with the filler opening 7a of the first electromagnetic switch valve 7, the oil outlet 7b of the first electromagnetic switch valve 7 is communicated with the rod chamber 3a of telescopic oil cylinder 3, the rodless cavity 3b of telescopic oil cylinder 3 is communicated with the 3rd hydraulic fluid port 6c of three-position four-way electromagnetic directional valve 6, 4th hydraulic fluid port 6d of three-position four-way electromagnetic directional valve 6 is communicated with the return opening 1b of power source 1.
Particularly, in the present embodiment, the hydraulic fluid port order naming rule of each operating valve is from left and right, from the bottom up along pointer arrangement, refers to shown in accompanying drawing.Wherein, three-position four-way electromagnetic directional valve 6 is when meta state, first hydraulic fluid port 6a closes, second hydraulic fluid port 6b, the 3rd hydraulic fluid port 6c and the 4th hydraulic fluid port 6d are interconnected, and during left position state, the second hydraulic fluid port 6b is communicated with the 4th hydraulic fluid port 6d, first hydraulic fluid port 6a is communicated with the 3rd hydraulic fluid port 6c, during right position state, the first hydraulic fluid port 6a is communicated with the second hydraulic fluid port 6b, and the 3rd hydraulic fluid port 6c is communicated with the 4th hydraulic fluid port 6d.By controlling unlatching or the closedown of the first electromagnetic switch valve 7, the start and stop work of telescopic oil cylinder 3 can be controlled.First electromagnetic switch valve 7 is electrically connected with controller 5, and the conducting when the first state is closed when the second state.
Further, claw oil cylinder 8, second electromagnetic switch valve 9 that this special vehicle Antistatic alarm also comprises the piston rod free end being arranged on telescopic oil cylinder 3 and the claw 10 driven by claw oil cylinder 8, the filler opening 9a of the second electromagnetic switch valve 9 is communicated with the second hydraulic fluid port 6b of three-position four-way electromagnetic directional valve 6, the 9b oil outlet of the second electromagnetic switch valve 9 is communicated with the rod chamber 8a of claw oil cylinder 8, and the rodless cavity 8b of claw oil cylinder 8 is communicated with the 3rd hydraulic fluid port 6c of three-position four-way electromagnetic directional valve 6.
Particularly, claw oil cylinder 8 drives the crawl of claw 10 and unclamps action, carries out less important work with the equipment controlled when claw 10 captures some electric operatings, wherein, second electromagnetic switch valve 9 is electrically connected with controller 5, and the conducting when the first state is closed when the second state.
Further, also comprise square box frame plate 11 and balladeur train 12, on the main body two side being fixed on square box frame plate 11 relative to the piston rod of telescopic oil cylinder 3 of claw oil cylinder 8, the side of the stationary jaw oil cylinder 8 of square box frame plate 11 is also provided with fixed plate 13, the bearing of trend of fixed plate 13 is parallel with the bearing of trend of the piston rod of claw oil cylinder 8, claw 10 comprises left mechanical arm 10a and right mechanical arm 10b, all to be hinged in the middle part of left mechanical arm 10a and right mechanical arm 10b on fixed plate 13 and to be oppositely arranged, one end of left mechanical arm 10a and right mechanical arm 10b is all slidably mounted in balladeur train 12, the middle part of balladeur train 12 is fixedly connected with the piston rod free end of claw oil cylinder 8.
Further, wherein in a kind of implementation, magnetic intensity detection device 4 is fixed on the outer side wall of square box frame plate 11, and magnetic intensity detection device 4 is arranged near the piston rod free end of claw oil cylinder 8.
Further, also comprise the first equilibrium valve 14 and the second equilibrium valve 15, first equilibrium valve 14 and the second equilibrium valve 15 keep when the first state often opening, first equilibrium valve 14 and the throttling supercharging when the second state of the second equilibrium valve 15, first hydraulic fluid port 14a of the first equilibrium valve 14 is communicated with the second hydraulic fluid port 6b of three-position four-way electromagnetic directional valve 6, second hydraulic fluid port 14b of the first equilibrium valve 14 is communicated with the filler opening 7a of the first electromagnetic switch valve 7, the control port 14c of the first equilibrium valve 14 is communicated with the first hydraulic fluid port 15a of the second equilibrium valve 15, second hydraulic fluid port 15b of the second equilibrium valve 15 respectively with telescopic oil cylinder 3, the rodless cavity of claw oil cylinder 8 is communicated with, the control port 15c of the second equilibrium valve 15 is communicated with the first hydraulic fluid port 14a of the first equilibrium valve 14.By arranging two equilibrium valves, when two oil cylinder oil inlet end oil pressure are excessive, section hydraulic oil can flow to two equilibrium valves, controls equilibrium valve switching state and starts throttling, the pressure at reverse balancing cylinder two ends.
Further, also comprise the first traveller 16, first one-way valve 17, second traveller 18 and the second one-way valve 19, one end of first traveller 16 extends in the control port 14c of the first equilibrium valve 14, the other end of the first traveller 16 and one end of the first one-way valve 17 are tightly connected, 17 the other ends of the first one-way valve are communicated with the first hydraulic fluid port 15a of the second equilibrium valve 15, one end of second traveller 18 extends in the control port of the second equilibrium valve 15, the other end of the second traveller 18 and one end of the second one-way valve 19 are tightly connected, the other end of the second one-way valve 19 is communicated with the first hydraulic fluid port 14a of the first equilibrium valve 14.
Particularly, as shown in Figure 1, control port place of the first equilibrium valve 14 and the second equilibrium valve 15 is except using hydraulic oil drived control, also be respectively arranged with the first traveller 16 and the second traveller 18 carries out auxiliary drive, directly promoted the spool of two equilibrium valves by solid traveller, the transmission of power more promptly and accurately.
Further, also comprise the first filter 20 be arranged between the first one-way valve 17 and the first hydraulic fluid port 15a of the second equilibrium valve 15, and be arranged on the second filter 21 between the second one-way valve 19 and the first hydraulic fluid port 14a of the first equilibrium valve 14.Particularly, control port place of two equilibrium valves requires higher to the clean degree of hydraulic oil, and affect the control accuracy of two equilibrium valves when hydraulic pressure well cuts is too much, the first filter 20 and the second filter 21 can filtered fluid force feed impurity.
Further, wherein in a kind of implementation, be also provided with the display screen 22 for showing the real-time distance of current magnetic field intensity and special vehicle and high voltage magnetic field in special vehicle, display screen 22 is electrically connected with controller 5.
A kind of special vehicle Antistatic alarm that the embodiment of the present invention provides, by arranging power source to drive telescopic oil cylinder movable on special vehicle, and then drive magnetic intensity detection device stretch out or regain with the electromagnetic field intensity detected near operating area, the magnetic field intensity signal detected feeds back to controller, when magnetic intensity reaches threshold value, controller controls acoustic-optic alarm and reports to the police, and to remind the position of staff deathtrap, improves the Security of electric operating.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a special vehicle Antistatic alarm, it is characterized in that, described special vehicle Antistatic alarm comprises the power source be arranged on special vehicle, acoustic-optic alarm, be communicated with described power source and the telescopic oil cylinder driven by described power source, be arranged on the magnetic intensity detection device on the piston rod free end of described telescopic oil cylinder, be electrically connected with described power source and control the controller that described power source starts or close, described acoustic-optic alarm and described magnetic intensity detection device are electrically connected with described controller respectively.
2. special vehicle Antistatic alarm according to claim 1, it is characterized in that, described special vehicle Antistatic alarm also comprises three-position four-way electromagnetic directional valve and the first electromagnetic switch valve, first hydraulic fluid port of described three-position four-way electromagnetic directional valve is communicated with the oil outlet of described power source, second hydraulic fluid port of described three-position four-way electromagnetic directional valve is communicated with the filler opening of described first electromagnetic switch valve, the oil outlet of described first electromagnetic switch valve is communicated with the rod chamber of described telescopic oil cylinder, the rodless cavity of described telescopic oil cylinder is communicated with the 3rd hydraulic fluid port of described three-position four-way electromagnetic directional valve, 4th hydraulic fluid port of described three-position four-way electromagnetic directional valve is communicated with the return opening of described power source.
3. special vehicle Antistatic alarm according to claim 2, it is characterized in that, described special vehicle Antistatic alarm also comprises the claw oil cylinder of the piston rod free end being arranged on described telescopic oil cylinder, second electromagnetic switch valve and the claw by described claw hydraulic oil cylinder driving, the filler opening of described second electromagnetic switch valve is communicated with the second hydraulic fluid port of described three-position four-way electromagnetic directional valve, the oil outlet of described second electromagnetic switch valve is communicated with the rod chamber of described claw oil cylinder, the rodless cavity of described claw oil cylinder is communicated with the 3rd hydraulic fluid port of described three-position four-way electromagnetic directional valve.
4. special vehicle Antistatic alarm according to claim 3, it is characterized in that, also comprise square box frame plate and balladeur train, on the main body two side being fixed on square box frame plate relative to the piston rod of described telescopic oil cylinder of described claw oil cylinder, the side of the stationary jaw oil cylinder of described square box frame plate is also provided with fixed plate, the bearing of trend of described fixed plate is parallel with the bearing of trend of the piston rod of described claw oil cylinder, described claw comprises left mechanical arm and right mechanical arm, all to be hinged in the middle part of described left mechanical arm and described right mechanical arm on fixed plate and to be oppositely arranged, one end of described left mechanical arm and described right mechanical arm is all slidably mounted in described balladeur train, the middle part of described balladeur train is fixedly connected with the piston rod free end of described claw oil cylinder.
5. special vehicle Antistatic alarm according to claim 4, it is characterized in that, described magnetic intensity detection device is fixed on the outer side wall of described square box frame plate, and described magnetic intensity detection device is arranged near the piston rod free end of described claw oil cylinder.
6. special vehicle Antistatic alarm according to claim 3, it is characterized in that, also comprise the first equilibrium valve and the second equilibrium valve, described first equilibrium valve and the second equilibrium valve keep when the first state often opening, the throttling supercharging when the second state of described first equilibrium valve and the second equilibrium valve, first hydraulic fluid port of described first equilibrium valve is communicated with the second hydraulic fluid port of described three-position four-way electromagnetic directional valve, second hydraulic fluid port of described first equilibrium valve is communicated with the filler opening of described first electromagnetic switch valve, the control port of described first equilibrium valve is communicated with the first hydraulic fluid port of described second equilibrium valve, second hydraulic fluid port of described second equilibrium valve respectively with telescopic oil cylinder, the rodless cavity of claw oil cylinder is communicated with, the control port of described second equilibrium valve is communicated with the first hydraulic fluid port of described first equilibrium valve.
7. special vehicle Antistatic alarm according to claim 6, it is characterized in that, also comprise the first traveller, first one-way valve, second traveller and the second one-way valve, one end of described first traveller extends in the control port of described first equilibrium valve, the other end of described first traveller and one end of the first one-way valve are tightly connected, the other end of described first one-way valve is communicated with the first hydraulic fluid port of the second equilibrium valve, one end of described second traveller extends in the control port of described second equilibrium valve, the other end of described second traveller and one end of the second one-way valve are tightly connected, the other end of described second one-way valve is communicated with the first hydraulic fluid port of the first equilibrium valve.
8. special vehicle Antistatic alarm according to claim 7, it is characterized in that, also comprise the first filter between the first hydraulic fluid port being arranged on described first one-way valve and described second equilibrium valve, and the second filter between the first hydraulic fluid port being arranged on described second one-way valve and described first equilibrium valve.
9. the special vehicle Antistatic alarm according to any one of claim 1 ~ 8, it is characterized in that, also be provided with the display screen for showing the real-time distance of current magnetic field intensity and special vehicle and high voltage magnetic field in described special vehicle, described display screen is electrically connected with described controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493052.1A CN105003496B (en) | 2015-08-13 | 2015-08-13 | Special vehicle Antistatic alarm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493052.1A CN105003496B (en) | 2015-08-13 | 2015-08-13 | Special vehicle Antistatic alarm |
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| CN105003496A true CN105003496A (en) | 2015-10-28 |
| CN105003496B CN105003496B (en) | 2017-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510493052.1A Active CN105003496B (en) | 2015-08-13 | 2015-08-13 | Special vehicle Antistatic alarm |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4233441A1 (en) * | 1992-07-21 | 1994-01-27 | Zikun Fahrzeugbau Gmbh | Auxiliary device for vehicle with articulated parts or tools for working on electric power lines - has sensor for detecting metal objects or electromagnetic and/or electrostatic fields and evaluation unit connected to alarm and/or actuator |
| US5592092A (en) * | 1994-10-28 | 1997-01-07 | Gas Research Institute | Pipe proximity warning device for accidental damage prevention mounted on the bucket of a backhoe |
| CN201172602Y (en) * | 2008-03-26 | 2008-12-31 | 江苏省电力公司南京供电公司 | Crane near-electricity alarming safety installation |
| CN103159137A (en) * | 2013-03-13 | 2013-06-19 | 江苏创导电气有限公司 | Electricity-closing alarm device of crane |
| CN203403465U (en) * | 2013-07-06 | 2014-01-22 | 徐州市若愚机械科技发展有限公司 | Safety locking device of loading machine |
| US20150047427A1 (en) * | 2013-04-12 | 2015-02-19 | Komatsu Ltd. | Hydraulic cylinder stroke operation diagnosis assisting device and hydraulic cylinder stroke operation diagnosis assisting method |
| CN204878135U (en) * | 2015-08-13 | 2015-12-16 | 国家电网公司 | Nearly electric alarm device of special type vehicle |
-
2015
- 2015-08-13 CN CN201510493052.1A patent/CN105003496B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4233441A1 (en) * | 1992-07-21 | 1994-01-27 | Zikun Fahrzeugbau Gmbh | Auxiliary device for vehicle with articulated parts or tools for working on electric power lines - has sensor for detecting metal objects or electromagnetic and/or electrostatic fields and evaluation unit connected to alarm and/or actuator |
| US5592092A (en) * | 1994-10-28 | 1997-01-07 | Gas Research Institute | Pipe proximity warning device for accidental damage prevention mounted on the bucket of a backhoe |
| CN201172602Y (en) * | 2008-03-26 | 2008-12-31 | 江苏省电力公司南京供电公司 | Crane near-electricity alarming safety installation |
| CN103159137A (en) * | 2013-03-13 | 2013-06-19 | 江苏创导电气有限公司 | Electricity-closing alarm device of crane |
| US20150047427A1 (en) * | 2013-04-12 | 2015-02-19 | Komatsu Ltd. | Hydraulic cylinder stroke operation diagnosis assisting device and hydraulic cylinder stroke operation diagnosis assisting method |
| CN203403465U (en) * | 2013-07-06 | 2014-01-22 | 徐州市若愚机械科技发展有限公司 | Safety locking device of loading machine |
| CN204878135U (en) * | 2015-08-13 | 2015-12-16 | 国家电网公司 | Nearly electric alarm device of special type vehicle |
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| CN105003496B (en) | 2017-09-15 |
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