CN105621260A - Safety device capable of automatically transmitting power after unexpected power loss of crown block - Google Patents
Safety device capable of automatically transmitting power after unexpected power loss of crown block Download PDFInfo
- Publication number
- CN105621260A CN105621260A CN201610145723.XA CN201610145723A CN105621260A CN 105621260 A CN105621260 A CN 105621260A CN 201610145723 A CN201610145723 A CN 201610145723A CN 105621260 A CN105621260 A CN 105621260A
- Authority
- CN
- China
- Prior art keywords
- overhead traveling
- traveling crane
- time relay
- crown block
- security device
- Prior art date
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C17/00—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention provides a device capable of automatically transmitting power after unexpected power loss of a crown block. The device is characterized in that a self-locking auxiliary contact of a main contactor of the crown block communicates with a dob (normally open) time relay; two pairs of contacts are in parallel connected; after a power supply slide wire is cut off, one group of contacts of the time relay is cut off 1-3 seconds later, and the crown block slides forwards under the action of inertia; and after a collector support of the crown block completely passes through a fault point, a main loop can be immediately energized, so that the whole crown block is recovered to the normal operation. According to the device provided by the invention, one time relay is additionally arranged through guide wires, and the principle is reliable and the steps are simple, so that the normal operation of the original safety device of the crown block is not affected, the occurrence of safety accidents is avoided, and a great deal of cost is saved.
Description
Technical field
The invention belongs to bridge crane electric automatization field, being specifically related to after the unexpected dead electricity of a kind of overhead traveling crane can the security device of power transmission automatically.
Background technology
Overhead traveling crane, a kind of crane span structure type lifting machine that namely crane span structure runs on overhead track, is widely used in the places such as indoor and outdoor warehouse, factory building, harbour and outdoor yard. What the overhead traveling crane of domestic industry enterprise great majority adopted is naked slip and the power supply mode of collector tray phase mutual friction, and at work due to various reasons such as vibrations, dust, expansion joints, cause the overhead traveling crane unexpected dead electricity of whole car, and because the existence of inertia, overhead traveling crane will slide forward a segment distance under runaway condition, the secondary disaster of overhead traveling crane collision or suspended object and equipment collision now very easily occurs, and annual such security incident all can occur a lot of.
Under normal circumstances, once the overhead traveling crane dead electricity in running, overhead traveling crane operative employee should take measures to recover power transmission immediately, and the process again controlling overhead traveling crane has following step: first each controller turns back zero-bit one by one; Secondly startup button is pressed in the very first time; Finally cart operation controller is pulled plug brake shelves position, overhead traveling crane traveling mechanism of the larger traveller is stopped; Carry out other operations again, recover normal. Complex steps, and be difficult to complete power transmission in the very first time. In prior art, usually solve the generation of this situation by installing two collector tray power down preventing device on overhead traveling crane, but this kind of apparatus structure complexity, inconvenience is installed, and cost is higher.
Therefore, it is provided that the security device of the automatic power transmission of energy after the unexpected dead electricity of a kind of overhead traveling crane is very necessary.
Summary of the invention
It is an object of the invention to solve in above-mentioned prior art the difficult problem existed, thering is provided after the unexpected dead electricity of a kind of overhead traveling crane can the security device of power transmission automatically, utilize time relay time delay to disconnect characteristic, the operating method of artificial power transmission should change the automatic power transmission of the time relay into by after overhead traveling crane dead electricity.
The present invention is achieved by the following technical solutions:
The security device of the automatic power transmission of energy after the unexpected dead electricity of a kind of overhead traveling crane; described security device comprises master loop and control loop; described master loop is provided with overhead traveling crane power supply protection switch QS; fusible cut-out FU1; thermo-relay FR and motor M; described control loop is provided with main contactor KM; stop button SB1; start button SB2 and fusible cut-out FU2; it is characterized in that: on described control loop on the self-locking secondary contact of main contactor KM by wire and connect a time relay KT, the described time relay is time delay rly. turn-off time.
As preferably, described time relay KT obtains electric by main contactor coil power or main contactor leading-out terminal. Time relay power supply takes from main contactor coil power or main contactor leading-out terminal, with contactless coil simultaneously electric, simultaneously dead electricity, with main contactor distance can far can be near, wire connects simple, quick for installation, it may also be useful to convenient.
As preferably, described time relay KT is fixed on inside primary source housing. Near the position of main contactor KM, easy for installation.
As preferably, the time regulatable scope of described time relay KT is the 1-5 second. The time regulatable range of choice width of time relay KT, this device has just used 1/the 10th even interval in limited time of mono-percent of conventional minimum value, and part selects restriction few, convenient.
As preferably, described connection wire cross-section area is greater than 2.5 square millimeters. The electric current that connection wire passes through is small, selects the wire meeting circuit conductor cross-section Uniform provisions on overhead traveling crane.
Compared with prior art, the invention has the beneficial effects as follows:
The device of the automatic power transmission of energy after the unexpected dead electricity of a kind of overhead traveling crane provided by the invention, the time delay being arranged on overhead traveling crane main contactor self-locking secondary contact UNICOM is adopted to disconnect (often opening) time relay KT, two pairs of contacts are connected in parallel, when after power slide-wire power-off, one group of contact delayed 2-3 second of time relay KT disconnects, overhead travelling crane sliding wire is behind trouble spot, and power transmission success, avoids the generation of security incident voluntarily. In the present invention, owing to being connected in parallel on the time delay function of the time relay KT of self-locking secondary contact, overhead traveling crane slides forward under the effect of inertia, when the collector tray of overhead traveling crane is completely behind trouble spot, master loop can immediately electric, whole car recovers normal and runs. Device provided by the invention, adds a time relay KT by means of only wire, avoids the generation of security incident, save great amount of cost, simultaneously safe and reliable.
In addition, the inventive method principle is reliable, and step is simple, does not affect the original security device of overhead traveling crane and normally runs, has application prospect widely.
It thus is seen that the present invention compared with prior art, has outstanding substantive distinguishing features and improves significantly, its useful effect implemented also is apparent.
Accompanying drawing explanation
Fig. 1 is the security device of the automatic power transmission of energy after the unexpected dead electricity of a kind of overhead traveling crane provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, also by specific embodiment, the present invention will be described in detail, and following examples are explanation of the invention, and the present invention is not limited to following enforcement mode.
As shown in Figure 1; the security device of the automatic power transmission of energy after the unexpected dead electricity of a kind of overhead traveling crane; described security device comprises master loop and control loop; described master loop is provided with overhead traveling crane power supply protection switch QS; fusible cut-out FU1; thermo-relay FR and motor M; described control loop is provided with main contactor KM; stop button SB1; start button SB2 and fusible cut-out FU2; it is characterized in that: on described control loop on the self-locking secondary contact of main contactor KM by wire and connect a time relay KT, described time relay KT is time delay rly. turn-off time.
In the present embodiment, described time relay KT obtains electric by main contactor coil power. In other embodiments of the invention, described time relay KT also obtains electric by main contactor leading-out terminal. Time relay KT power supply takes from main contactor coil power or main contactor leading-out terminal, with contactless coil simultaneously electric, simultaneously dead electricity, with main contactor KM distance can far can be near, wire connects simple, quick for installation, it may also be useful to convenient.
In the present embodiment, described time relay KT is fixed on inside primary source housing. Near the position of main contactor KM, easy for installation.
In the present embodiment, the time regulatable scope of described time relay KT is adjusted to the 2-3 second. The time regulatable range of choice width of time relay KT, this device has just used 1/the 10th even interval in limited time of mono-percent of conventional minimum value, and part selects restriction few, convenient.
In the present embodiment, described connection wire cross-section area is greater than 2.5 square millimeters. The electric current that connection wire passes through is small, selects the wire meeting circuit conductor cross-section Uniform provisions on overhead traveling crane.
The device of the automatic power transmission of energy after the unexpected dead electricity of a kind of overhead traveling crane provided by the invention, the time delay being arranged on overhead traveling crane main contactor self-locking secondary contact UNICOM is adopted to disconnect (often opening) time relay KT, two pairs of contacts are connected in parallel, when after power slide-wire power-off, one group of contact of time relay KT delayed about 1-3 second disconnects, overhead travelling crane sliding wire is behind trouble spot, and power transmission success, avoids the generation of security incident voluntarily. In the present invention, owing to being connected in parallel on the time delay function of the time relay of self-locking secondary contact, overhead traveling crane slides forward under the effect of inertia, when the collector tray of overhead traveling crane is completely behind trouble spot, master loop can immediately electric, whole car recovers normal and runs. Device provided by the invention, adds a time relay KT by means of only wire, avoids the generation of security incident, save great amount of cost, simultaneously safe and reliable.
Under normal circumstances, the overhead traveling crane power supply that closes protection switch QS, introduces power supply, presses and start button SB2, and main contact coil KM connects, and normally opened contact KM is closed by three, and overhead traveling crane is electricly overall; Unclamping and start button SB2, control loop, because the contactor at two ends often leaves the closed conducting of secondary contact KM and can not disconnect, forms self-locking; Now starting overhead traveling crane any mechanism controller, overhead traveling crane will run well; Pressing stop button SB1, control loop disconnects, main contactor coil KM dead electricity, and main contactor discharges, whole car power-off. In whole security device, fusible cut-out FU1, the short circuit provide protection of fusible cut-out FU2 phase circuit, thermo-relay FR plays overload protective function, and self-locking control circuit has under-voltage protection and provide protection of exerting pressure.
In overhead traveling crane normal course of operation, owing to power slide-wire joint has gap, or on power slide-wire, there are the situations such as dust local, causes the overhead traveling crane of short duration dead electricity of power supply collector tray, now main contact coil KM dead electricity, and main contactor discharges, whole car dead electricity; Time relay KT owing to being connected in parallel on self-locking secondary contact KM has time delay and disconnects function, the normally closed contact of this time relay KT can not disconnect immediately after dead electricity, when overhead traveling crane continues to slide forward under inertia effect, collector tray completely by behind trouble spot, master loop again electric; And in control loop, all disconnecting although starting button SB2 and self-locking secondary contact KM, but the time delay disconnection function due to time relay KT, not yet disconnect, after the electricity of power supply, again form loop so that main contactor coil KM obtains electric, main contactor is adhesive again, and whole car resumes operation.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the present invention discloses application method and principle, it is easy to make various types of improvement or distortion, and it is not limited only to the method described by the above-mentioned embodiment of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (6)
1. can the security device of power transmission automatically after the unexpected dead electricity of an overhead traveling crane; described security device comprises master loop and control loop; described master loop is provided with overhead traveling crane power supply protection switch QS; fusible cut-out FU1; thermo-relay FR and motor M; described control loop is provided with main contactor KM; stop button SB1; start button SB2 and fusible cut-out FU2; it is characterized in that: on described control loop on the self-locking secondary contact of main contactor KM by connect wire and connect a time relay KT, the described time relay is time delay rly. turn-off time.
2. can the security device of power transmission automatically after the unexpected dead electricity of a kind of overhead traveling crane as claimed in claim 1, it is characterised in that: described time relay KT obtains electric by main contactor coil power.
3. can the security device of power transmission automatically after the unexpected dead electricity of a kind of overhead traveling crane as claimed in claim 1, it is characterised in that: described time relay KT obtains electric by main contactor leading-out terminal.
4. can the security device of power transmission automatically after the unexpected dead electricity of a kind of overhead traveling crane as described in claim 1 or 2 or 3, it is characterised in that: described time relay KT is fixed on inside primary source housing.
5. can the security device of power transmission automatically after the unexpected dead electricity of a kind of overhead traveling crane as claimed in claim 4, it is characterised in that: the time regulatable scope of described time relay KT is the 1-5 second.
6. can the security device of power transmission automatically after the unexpected dead electricity of a kind of overhead traveling crane as claimed in claim 5, it is characterised in that: described connection wire cross-section area is greater than 2.5 square millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610145723.XA CN105621260A (en) | 2016-03-15 | 2016-03-15 | Safety device capable of automatically transmitting power after unexpected power loss of crown block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610145723.XA CN105621260A (en) | 2016-03-15 | 2016-03-15 | Safety device capable of automatically transmitting power after unexpected power loss of crown block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105621260A true CN105621260A (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610145723.XA Pending CN105621260A (en) | 2016-03-15 | 2016-03-15 | Safety device capable of automatically transmitting power after unexpected power loss of crown block |
Country Status (1)
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|---|---|
| CN (1) | CN105621260A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201501743U (en) * | 2009-09-21 | 2010-06-09 | 宝山钢铁股份有限公司 | Control device for crane anti-skid hook |
| CN201703984U (en) * | 2009-11-27 | 2011-01-12 | 安徽江淮起重运输机械有限公司 | Electrical control system of engineering gantry crane |
| CN203387160U (en) * | 2013-05-02 | 2014-01-08 | 苏州汇川技术有限公司 | Draught fan control circuit of high voltage frequency converter |
| CN205419560U (en) * | 2016-03-15 | 2016-08-03 | 山东钢铁股份有限公司 | Safety device of automatic power transmission of ability behind unexpected mistake electricity of overhead traveling crane |
-
2016
- 2016-03-15 CN CN201610145723.XA patent/CN105621260A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201501743U (en) * | 2009-09-21 | 2010-06-09 | 宝山钢铁股份有限公司 | Control device for crane anti-skid hook |
| CN201703984U (en) * | 2009-11-27 | 2011-01-12 | 安徽江淮起重运输机械有限公司 | Electrical control system of engineering gantry crane |
| CN203387160U (en) * | 2013-05-02 | 2014-01-08 | 苏州汇川技术有限公司 | Draught fan control circuit of high voltage frequency converter |
| CN205419560U (en) * | 2016-03-15 | 2016-08-03 | 山东钢铁股份有限公司 | Safety device of automatic power transmission of ability behind unexpected mistake electricity of overhead traveling crane |
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Application publication date: 20160601 |