CN204510184U - The speed-limiting protective device of self-elevating platform up-down system - Google Patents
The speed-limiting protective device of self-elevating platform up-down system Download PDFInfo
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- CN204510184U CN204510184U CN201520186846.9U CN201520186846U CN204510184U CN 204510184 U CN204510184 U CN 204510184U CN 201520186846 U CN201520186846 U CN 201520186846U CN 204510184 U CN204510184 U CN 204510184U
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Abstract
The utility model provides a kind of speed-limiting protective device of self-elevating platform up-down system, and it comprises: lifting motor, for driving lift platform; Planetary reduction box, described lifting motor is fixed to described planetary reduction box; Brake, is arranged on the high speed shaft of described planetary reduction box; Speed limit unit and control unit, described speed limit unit reads the real-time rotate speed of described lifting motor, and corresponding signal is transferred to described control unit, carries out speed-limiting protection by described control unit to described lifting motor.The speed-limiting protective device of the utility model self-elevating platform up-down system is by arranging the parts such as rotating speed coder, overspeed switch, frequency conversion tank coding unit and overspeed relay; realize duplicate protection when lifting motor is exceeded the speed limit; protect the job safety of lifting platform to the full extent, thus improve accuracy and the flexibility of self-elevating platform up-down system speed-limiting protective device.
Description
Technical field
The utility model relates to offshore oil drilling platform field, particularly a kind of speed-limiting protective device of self-elevating platform up-down system.
Background technology
In offshore oil drilling platform field, self-elevating drilling platform is the capital equipment of gas and oil in sea, exploitation.Self-elevating drilling platform of the prior art normally drives tooth bar to carry out the lifting action of implementation platform by motor.This kind of platform is many to be made up of three spud legs, and each spud leg comprises three tooth bars, and each tooth bar is driven by multiple motor, then carries out run-in synchronism by tens lifting motors on corresponding lift control system parametric controller.
Wherein, lift control system is the core component of lifting gear, is the basic assurance of self-elevating platform up-down system safe operation.Therefore, in order to improve the safety that lifting gear runs, the safety and reliability problem of control system must be thought better of.
In addition, in order to prevent in lifting self-elevating platform process, platform surprisingly declines, and needs to adopt overspeed switch to prevent the hypervelocity of lifting motor.In order to improve accuracy and the flexibility of lifting self-elevating platform control system, the pure hardware controls of overspeed switch being controlled to combine with PLC, the safety of jack-up unit can be ensured to a greater extent.
Utility model content
The technical problems to be solved in the utility model is to overcome the defect that in prior art, the safety and reliability of self-elevating platform up-down system has much room for improvement, and provides a kind of self-elevating platform up-down system.
The utility model solves above-mentioned technical problem by following technical proposals: a kind of speed-limiting protective device of self-elevating platform up-down system, and its feature is, described speed-limiting protective device comprises:
Lifting motor, for driving lift platform;
Planetary reduction box, described lifting motor is fixed to described planetary reduction box;
Brake, is arranged on the high speed shaft of described planetary reduction box;
Speed limit unit and control unit, described speed limit unit reads the real-time rotate speed of described lifting motor, and corresponding signal is transferred to described control unit, carries out speed-limiting protection by described control unit to described lifting motor.
Preferably, described speed limit unit comprises:
Rotating speed coder and overspeed switch, described rotating speed coder and described overspeed switch are fixed on described brake, are coaxially connected with the high speed shaft of described planetary reduction box;
Frequency conversion tank coding unit, described rotating speed coder is connected by the signal of telecommunication with described frequency conversion tank coding unit, makes described frequency conversion tank coding unit read the real-time rotate speed of described lifting motor;
Overspeed relay, described overspeed switch is connected with described overspeed relay signal.
Preferably, described control unit comprises:
PLC, is connected with described frequency conversion tank coding unit, for receiving the real-time rotate speed value of the described lifting motor that described frequency conversion tank coding unit transmits; Described PLC is also connected with described overspeed relay, for receiving the signal of described overspeed switch;
Jacking system tightly stops loop, is connected with described overspeed relay, for receiving the signal of described overspeed switch.
Preferably, described lifting motor is fixed to the high speed shaft of described planetary reduction box by flange face.
Preferably, the main shaft of described lifting motor is connected to the high speed shaft of described planetary reduction box by spline form.
Preferably, every two described rotating speed coders and described overspeed switch are arranged on every bar spud leg of self-elevating platform up-down system, and two described rotating speed coders each other redundancy are linked into described frequency conversion tank coding unit.
Preferably, described frequency conversion tank coding unit is also provided with selector switch, for switching two corresponding described rotating speed coders.
Preferably, each described overspeed switch switching signal of providing a road normally closed is to corresponding described overspeed relay; By described overspeed relay, the switching signal of corresponding described overspeed switch is divided into two-way, a path switching signal is connected in series to described jacking system by hardware connection mode and tightly stops loop, and another path switching signal is connected to described PLC.
Preferably, described every two described overspeed relaies are arranged on every bar spud leg of self-elevating platform up-down system;
The signal of the described overspeed relay on spud leg described in same tightly stops loop by parallel way signal wiring to described jacking system, and the signal of the described overspeed relay on different described spud legs tightly stops loop by series system signal wiring to described jacking system.
Positive progressive effect of the present utility model is: the speed-limiting protective device of the utility model self-elevating platform up-down system is by arranging the parts such as rotating speed coder, overspeed switch, frequency conversion tank coding unit and overspeed relay; realize duplicate protection when lifting motor is exceeded the speed limit; protect the job safety of lifting platform to the full extent, thus improve accuracy and the flexibility of self-elevating platform up-down system speed-limiting protective device.
Accompanying drawing explanation
The above and other feature of the utility model, character and advantage are by more obvious by what become below in conjunction with the description of drawings and Examples, and Reference numeral identical in the accompanying drawings represents identical feature all the time, wherein:
Fig. 1 is the block diagram of the speed-limiting protective device of the utility model self-elevating platform up-down system.
Fig. 2 is the layout schematic diagram of the speed-limiting protective device of the utility model self-elevating platform up-down system.
Detailed description of the invention
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is elaborated.
Set forth a lot of detail in the following description so that fully understand the utility model, but the utility model can also adopt other to be different from alternate manner described here to implement, therefore the utility model is not by the restriction of following public specific embodiment.
Fig. 1 is the block diagram of the speed-limiting protective device of the utility model self-elevating platform up-down system.Fig. 2 is the layout schematic diagram of the speed-limiting protective device of the utility model self-elevating platform up-down system.
As depicted in figs. 1 and 2, the utility model discloses a kind of speed-limiting protective device of self-elevating platform up-down system, described speed-limiting protective device comprises lifting motor 10, planetary reduction box 20, brake 30 and speed limit unit and control unit.Wherein, lifting motor 10 is for driving lift platform, lifting motor 10 is fixed to planetary reduction box 20, be preferably high speed shaft lifting motor 10 being fixed to planetary reduction box 20 by flange face, and the main shaft of lifting motor 10 is connected to the high speed shaft of planetary reduction box 20 by spline form.Brake 30 is arranged on the high speed shaft of planetary reduction box 20.Described speed limit unit reads the real-time rotate speed of described lifting motor, and corresponding signal is transferred to described control unit, carries out speed-limiting protection by described control unit to described lifting motor.
Further, described speed limit unit comprises rotating speed coder 40, overspeed switch 50, frequency conversion tank coding unit 60 and overspeed relay 70.Rotating speed coder 40 and overspeed switch 50 are fixed on brake 30, are coaxially connected with the high speed shaft of planetary reduction box 20.Frequency conversion tank coding unit 60 is connected by the signal of telecommunication with rotating speed coder 40, makes frequency conversion tank coding unit 60 read the real-time rotate speed of lifting motor 10.Overspeed switch 50 is connected with overspeed relay 70 signal.
Preferably, described control unit comprises PLC 80 and jacking system tightly stops loop 90.PLC 80 is connected with frequency conversion tank coding unit 60, for receiving the real-time rotate speed value of the lifting motor 10 that frequency conversion tank coding unit 60 transmits.PLC 80 is also connected with overspeed relay 70, for receiving the signal of overspeed switch 50.Jacking system tightly stops loop 90 and is connected with overspeed relay 70, for receiving the signal of overspeed switch 50.
Speed-limiting protective device described in the utility model is under the main shaft and rotating speed coder 40, overspeed switch 50 axiality that ensure lifting motor 10 and the reliability situation be connected; the main shaft of lifting motor 10 is connected with planetary reduction box 20 high speed shaft, then rotating speed coder 40 and overspeed switch 50 are installed.When lifting motor 10 operates, the main shaft of motor drives reduction box high speed shaft, reduction box high speed shaft drives again encoder and overspeed switch to start working simultaneously, send the signal of telecommunication, real-time detection lifting motor rotating speed, and greatly reduced the downside risk of platform by the setting value of overspeed switch 50, real-time monitoring has been carried out to rising or falling speed.When finding that there is any hypervelocity phenomenon, system will force the operation of lifting ship immediately, and make brake dead electricity, lifting motor is locked simultaneously, thus realizes carrying out bidirectional protective to lifting motor, the safety of protecting platform lift work to the full extent.
Further preferably, for described self-elevating platform up-down system, every bar spud leg is installed two rotating speed coders 40 and overspeed switch 50, two rotating speed coders 40 each other redundancy be linked into frequency conversion tank coding unit 60.A rotating speed coder 40 is only had to work under normal condition.
Frequency conversion tank coding unit 60 preferably arranges a selector switch, for switching two corresponding rotating speed coders 40.When one of them rotating speed coder 40 cannot normally work, be switched to another one rotating speed coder 40 by a selector switch on frequency conversion tank coding unit 60 groups and work.Again by the value of feedback of lift control system monitoring rotation speed encoder 40.After brake 30 is opened, if the value of feedback of rotating speed coder 40 is less than setting value, disconnects and control electricity, system electrical is stopped.If the deviation of the true output valve of the value of feedback of rotating speed coder 4 and frequency conversion tank coding unit 60 is greater than setting value (namely the value of rotating speed coder 40 occurs abnormal), then disconnect jacking system and control power supply, system electrical is stopped, brake 30 band-type brake.
In addition, every bar spud leg is provided with two overspeed switch 50, each self-elevating platform up-down system is provided with six overspeed switch 50 altogether, is arranged on two different strings.Two overspeed switch signals on same spud leg tightly stop in loop 90 by parallel way signal wiring to jacking system, and the overspeed switch signal on different spud legs is tightly stopped in loop 90 to whole jacking system by series system signal wiring.The switching signal that each overspeed switch 50 provides a road normally closed is to corresponding overspeed relay 70.By described overspeed relay, the switching signal of corresponding described overspeed switch is divided into two-way, a path switching signal is connected in series to jacking system by hardware connection mode and tightly stops loop 90, realizes the hardware protection that lifting motor 10 exceeds the speed limit; Another path switching signal is connected to PLC 80, realizes the software protection that lifting motor 10 exceeds the speed limit.
Further preferably, every bar spud leg of described self-elevating platform up-down system installs two overspeed relaies 70.The signal of two overspeed relaies 70 on spud leg described in same tightly stops loop 90 by parallel way signal wiring to jacking system, and the signal of the overspeed relay 70 on different described spud legs tightly stops loop 90 by series system signal wiring to jacking system.
As shown in Figure 2, when the overspeed switch of two on same spud leg 50 all detects that lifting motor 10 exceeds the speed limit, the normally closed switch signal of two overspeed switch 50 will trigger disconnection simultaneously, by the normally closed some signal of overspeed relay 70 that make on same spud leg also dead electricity simultaneously, thus on hardware mode, cut off jacking system main power source, system mechanics is stopped, the instantaneous band-type brake of brake 30.
When same spud leg only having an overspeed switch 50 detect that lifting motor 10 exceeds the speed limit; now jacking system tightly stops the main power source that loop 90 can not cut off jacking system; but the other road normally closed switch signal connecting the overspeed relay 70 of overspeed switch 50 will disconnect, and this switching signal is fed back to PLC 80.PLC 80 carries out delay process and Logic judgment, prevents overspeed switch 50 misoperation and causes destroying the stability of a system.If PLC 80 judges that single lifting motor 10 exceeds the speed limit, system will disconnect control power supply, and system electrical is stopped.
When PLC 80 lost efficacy, can by the timely parting system power supply of hardware connection mode of overspeed switch 50, brake 30 band-type brake, realizes duplicate protection when lifting motor 10 exceeds the speed limit.Exported by the double switch signal of overspeed relay 70, hardware protection circuit is combined with PLC software protection, achieve duplicate protection when lifting motor 10 exceeds the speed limit, improve accuracy and the flexibility of the speed-limiting protective device of self-elevating platform up-down system.
Although the foregoing describe detailed description of the invention of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection domain of the present utility model is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present utility model and essence, can make various changes or modifications to these embodiments, but these change and amendment all falls into protection domain of the present utility model.
Claims (9)
1. a speed-limiting protective device for self-elevating platform up-down system, is characterized in that, described speed-limiting protective device comprises:
Lifting motor, for driving lift platform;
Planetary reduction box, described lifting motor is fixed to described planetary reduction box;
Brake, is arranged on the high speed shaft of described planetary reduction box;
Speed limit unit and control unit, described speed limit unit reads the real-time rotate speed of described lifting motor, and corresponding signal is transferred to described control unit, carries out speed-limiting protection by described control unit to described lifting motor.
2. the speed-limiting protective device of self-elevating platform up-down system as claimed in claim 1, it is characterized in that, described speed limit unit comprises:
Rotating speed coder and overspeed switch, described rotating speed coder and described overspeed switch are fixed on described brake, are coaxially connected with the high speed shaft of described planetary reduction box;
Frequency conversion tank coding unit, described rotating speed coder is connected by the signal of telecommunication with described frequency conversion tank coding unit, makes described frequency conversion tank coding unit read the real-time rotate speed of described lifting motor;
Overspeed relay, described overspeed switch is connected with described overspeed relay signal.
3. the speed-limiting protective device of self-elevating platform up-down system as claimed in claim 2, it is characterized in that, described control unit comprises:
PLC, is connected with described frequency conversion tank coding unit, for receiving the real-time rotate speed value of the described lifting motor that described frequency conversion tank coding unit transmits; Described PLC is also connected with described overspeed relay, for receiving the signal of described overspeed switch;
Jacking system tightly stops loop, is connected with described overspeed relay, for receiving the signal of described overspeed switch.
4. the speed-limiting protective device of self-elevating platform up-down system as claimed in claim 1, it is characterized in that, described lifting motor is fixed to the high speed shaft of described planetary reduction box by flange face.
5. the speed-limiting protective device of self-elevating platform up-down system as claimed in claim 1, it is characterized in that, the main shaft of described lifting motor is connected to the high speed shaft of described planetary reduction box by spline form.
6. the speed-limiting protective device of self-elevating platform up-down system as claimed in claim 2; it is characterized in that; every two described rotating speed coders and described overspeed switch are arranged on every bar spud leg of self-elevating platform up-down system, and two described rotating speed coders each other redundancy are linked into described frequency conversion tank coding unit.
7. the speed-limiting protective device of self-elevating platform up-down system as claimed in claim 6, it is characterized in that, described frequency conversion tank coding unit is also provided with selector switch, for switching two corresponding described rotating speed coders.
8. the speed-limiting protective device of self-elevating platform up-down system as claimed in claim 3, is characterized in that, the switching signal that each described overspeed switch provides a road normally closed is to corresponding described overspeed relay; By described overspeed relay, the switching signal of corresponding described overspeed switch is divided into two-way, a path switching signal is connected in series to described jacking system by hardware connection mode and tightly stops loop, and another path switching signal is connected to described PLC.
9. the speed-limiting protective device of self-elevating platform up-down system as claimed in claim 8, it is characterized in that, described every two described overspeed relaies are arranged on every bar spud leg of self-elevating platform up-down system;
The signal of the described overspeed relay on spud leg described in same tightly stops loop by parallel way signal wiring to described jacking system, and the signal of the described overspeed relay on different described spud legs tightly stops loop by series system signal wiring to described jacking system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520186846.9U CN204510184U (en) | 2015-03-31 | 2015-03-31 | The speed-limiting protective device of self-elevating platform up-down system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520186846.9U CN204510184U (en) | 2015-03-31 | 2015-03-31 | The speed-limiting protective device of self-elevating platform up-down system |
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| CN204510184U true CN204510184U (en) | 2015-07-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746496A (en) * | 2015-03-31 | 2015-07-01 | 上海振华重工(集团)股份有限公司 | Speed-limiting protecting device for self-elevating platform lifting system |
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- 2015-03-31 CN CN201520186846.9U patent/CN204510184U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746496A (en) * | 2015-03-31 | 2015-07-01 | 上海振华重工(集团)股份有限公司 | Speed-limiting protecting device for self-elevating platform lifting system |
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