CN101787684B - Overload protection device of screw open-close machine - Google Patents
Overload protection device of screw open-close machine Download PDFInfo
- Publication number
- CN101787684B CN101787684B CN2010101161426A CN201010116142A CN101787684B CN 101787684 B CN101787684 B CN 101787684B CN 2010101161426 A CN2010101161426 A CN 2010101161426A CN 201010116142 A CN201010116142 A CN 201010116142A CN 101787684 B CN101787684 B CN 101787684B
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- close machine
- screw open
- protection device
- overload protection
- screw
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Abstract
The invention discloses an overload protection device of a screw open-close machine and belongs to a protection device for the up and down movement of a hydraulic gate. The protection device comprises a screw open-close machine mounting block and a foundation mounting block, wherein a transitional block is arranged between the screw open-close machine mounting block and the foundation mounting block; strain gauges are adhered to side walls of the transitional block; and output lines of the strain gauges output signals from the foundation mounting block to a programmable logic controller (PLC) for processing the signals, and the controller is connected with a motor of the screw open-close machine. An overload protection device is respectively arranged on both sides below the base of the screw open-close machine; the screw open-close machine is fixed on the screw open-close machine mounting block and the foundation mounting block is fixed on the base of the screw open-close machine by foundation screws. The overload protection device has the advantages of: 1, convenient mounting, 2, heavy tonnage, 3, realization of protection by using the negative and positive force principle of the overload protection device, 4, convenient cable fixation without backward and forward expansion along with the movement of the screw, and 5, convenient maintenance.
Description
Technical field
The overload protection device of protective device, particularly a kind of screw open-close machine when the present invention relates to a kind of water conservancy gate and moving up and down.
Background technology
As everyone knows, screw open-close machine mainly is upper and lower spacing protection of dependence equipment when actual motion.Gate runs in limited time, and the spacing action of the upper limit realizes protection, runs to down in limited time, and the spacing action of lower limit realizes protection.But in certain occasion, if the gate slot both sides occur stuck or have barrier on the end bank below the gate, continue the operating equipment operation, will cause device damage, bent screws, headstock gear are rushed to summit.
At present, at the drive screw of screw open-close machine and the junction of gate coupling shaft being arranged, be used for the protective device of screw open-close machine load overload, is to adopt pivot pin load sensor or drawing and pressing type sensor to replace original coupling shaft.The weight of gate imposes on load sensor when screw open-close machine moves, and when the small variation of elastic body generation of load sensor, small and weak voltage of load sensor output is given intelligence instrument, is handled, controlled the operation of screw open-close machine by intelligence instrument.This type of protective device can only play the overload protection effect when screw open-close machine rises, gate moves downwards or the gate slot both sides do not have the overload protection effect when stuck.
Summary of the invention
The objective of the invention is to provide a kind of: gate rise or the decline operational process in the gate slot both sides overload protection device of the screw open-close machine of overload protection effect appears respectively having when stuck.
The object of the present invention is achieved like this: this protective device has screw open-close machine mounting blocks and lower margin mounting blocks; between screw open-close machine mounting blocks and lower margin mounting blocks, transition block is arranged; on the sidewall of transition block, be pasted with foil gauge; the output line of foil gauge outputs signal to the PLC controller from lower margin mounting blocks end and handles, and controller is connected with the motor of screw open-close machine.
Described foil gauge is a metal resistance strain gauge; form by matrix material, metal strain silk or strain paper tinsel, insulation protection sheet and extension line; metal strain silk or strain paper tinsel stick on the matrix material; at surface coverage one deck insulation protection sheet, the extension line of metal strain silk or strain paper tinsel is fixed on the matrix material.
Beneficial effect: owing to adopted such scheme; this overload protection device is installed under the pedestal of screw open-close machine; an overload protection device is respectively installed on each limit; screw open-close machine is fixed on the screw open-close machine mounting blocks; foundation bolt is fixed on screw rod with the lower margin mounting blocks and opens on the pedestal of machine, and every screw open-close machine is installed two overload protection devices.
Overload protection device produces elastic deformation under external force; make the foil gauge that sticks on the transition block sidewall also in company with producing corresponding distortion; because foil gauge deforms; the variation that the resistance of foil gauge increase will take place or reduces; through corresponding metering circuit this resistance variations is converted to the electric signal of voltage or electric current again; the deformation quantity of external force is transformed to electric signal output; motor by intelligence instrument and controller control screw open-close machine shuts down again; gate rise or the decline operational process in the gate slot both sides occur having the overload protection effect when stuck respectively, reached purpose of the present invention.
Advantage: 1, easy for installation.2, tonnage is big.3, utilize the positive and negative stressed principle of overload protection device to realize protective effect.4, cable is convenient fixing, need be not flexible back and forth along with moving of screw rod.5, easy to maintenance.
Description of drawings
Fig. 1 is a structural drawing of the present invention.
Fig. 2 is user mode figure of the present invention.
Among the figure, 1, the signal output cable; 2, the fixed orifice that is connected with the base angle; 3, the fixed orifice that is connected with screw open-close machine; 4, conversion element; The 1-1 pre-embedded steel slab; 1-2, screw rod overload protection device; 1-3, overload protection device fixed screw; 1-4, screw open-close machine; 1-5, screw rod.
Embodiment
Embodiment 1: this protective device has screw open-close machine mounting blocks and lower margin mounting blocks; between screw open-close machine mounting blocks and lower margin mounting blocks, transition block is arranged; on the sidewall of transition block, be pasted with foil gauge; the output line of foil gauge is handled to the PLC controller from lower margin mounting blocks end output signal, and controller is connected with the motor of screw open-close machine.
Described PLC controller is selected Schneider TWDLCAE40 series for use.
Described foil gauge is a metal resistance strain gauge; form by matrix material, metal strain silk or strain paper tinsel, insulation protection sheet and extension line; metal strain silk or strain paper tinsel stick on the matrix material; at surface coverage one deck insulation protection sheet, the extension line of metal strain silk or strain paper tinsel is fixed on the matrix material.
Screw open-close machine has pre-embedded steel slab 1-1, screw rod overload protection device 1-2, overload protection device fixed screw 1-3, screw open-close machine 1-4, screw rod 1-5.This overload protection device is installed under the pedestal of screw open-close machine; an overload protection device is respectively installed on each limit; screw open-close machine is fixed on the screw open-close machine mounting blocks; foundation bolt is fixed on screw rod with the lower margin mounting blocks and opens on the pedestal of machine, and every screw open-close machine is installed two overload protection devices.
The course of work of overload protection device: when screw open-close machine moves; leading screw drives gate and moves up and down; make screw open-close machine pedestal integral body stressed; be installed in the elastic body generation subtle change on pedestal both sides; the tangible time variant voltage of load sensor that sticks on the elastic body produces, and the deformation voltage signal is transported to intelligence instrument, and intelligence instrument sends judges that signal conveys is to control; because controller is controlled the rotation of motor or is stopped, and comes the safe operation of support equipment with this.
1, when gate in uphill process; if the gate slot both sides have on one side or the stuck phenomenon in both sides; this moment, leading screw continued to move up, and the hoisting capacity of screw open-close machine exceeds normal value, and the power that pedestal integral body is subjected to imposes on positive pressure of overload protection device; if continue stressed when exceeding the protection value of normal setting; the overload protection device voltage signal is exported to intelligence instrument, and intelligence instrument sends the overload signal, cuts off the control power supply; headstock gear is out of service, the safety of support equipment.
2, when gate in the decline process; if the gate slot both sides have on one side or the stuck phenomenon in both sides; this moment, leading screw continued to move down; the hoisting capacity of screw open-close machine exceeds normal value, and the opposite force that pedestal integral body is subjected to imposes on overload protection device, if continue stressed when exceeding the protection value of normal setting; the voltage signal of overload protection device is exported to intelligence instrument; intelligence instrument sends the overload signal, cuts off the control power supply, the safety of headstock gear support equipment out of service.
3, in the process that gate is descending; if appearring in gate below end Kan Chu, object hinders gate decline phenomenon; this moment, leading screw continued to move down, and the hoisting capacity of screw open-close machine exceeds normal value, and the opposite force that pedestal integral body is subjected to imposes on overload protection device; if continue stressed when exceeding the protection value of normal setting; the overload protection device voltage signal is exported to intelligence instrument, and intelligence instrument sends the overload signal, cuts off the control power supply; headstock gear is out of service, the safety of support equipment.
4, prescribe a time limit when gate arrives down, if the lower limit of headstock gear is ineffective, this moment, gate can apply a counter-force to overload protection device after falling the end.Intelligence instrument can send the overload signal when exceeding normal setting value, and equipment is out of service, support equipment safety.
Claims (2)
1. the overload protection device of a screw open-close machine, it is characterized in that: this protective device has screw open-close machine mounting blocks and lower margin mounting blocks, between screw open-close machine mounting blocks and lower margin mounting blocks, transition block is arranged, on the sidewall of transition block, be pasted with foil gauge, the output line of foil gauge outputs signal to the PLC controller from lower margin mounting blocks end and handles, and controller is connected with the motor of screw open-close machine;
This overload protection device is installed under the pedestal of screw open-close machine, and an overload protection device is respectively installed on each limit, and screw open-close machine is fixed on the screw open-close machine mounting blocks, and foundation bolt is fixed on the lower margin mounting blocks on the pedestal of screw open-close machine.
2. the overload protection device of screw open-close machine according to claim 1; it is characterized in that: described foil gauge is a metal resistance strain gauge; form by matrix material, metal strain silk or strain paper tinsel, insulation protection sheet and extension line; metal strain silk or strain paper tinsel stick on the matrix material; at surface coverage one deck insulation protection sheet, the extension line of metal strain silk or strain paper tinsel is fixed on the matrix material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101161426A CN101787684B (en) | 2010-02-23 | 2010-02-23 | Overload protection device of screw open-close machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101161426A CN101787684B (en) | 2010-02-23 | 2010-02-23 | Overload protection device of screw open-close machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101787684A CN101787684A (en) | 2010-07-28 |
| CN101787684B true CN101787684B (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101161426A Expired - Fee Related CN101787684B (en) | 2010-02-23 | 2010-02-23 | Overload protection device of screw open-close machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN101787684B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447733B (en) * | 2017-09-13 | 2023-05-30 | 徐州淮海电子传感工程研究所有限公司 | Intelligent slide block for protecting screw of screw hoist with alarm device |
| CN110608823A (en) * | 2019-06-11 | 2019-12-24 | 蚌埠学院 | Gate lifting weight detection sensor |
| CN110485385A (en) * | 2019-09-03 | 2019-11-22 | 唐山现代工控技术有限公司 | A kind of method and device preventing gate bent screws |
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2010
- 2010-02-23 CN CN2010101161426A patent/CN101787684B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101787684A (en) | 2010-07-28 |
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Addressee: Zhao Feng Document name: Notification to Pay the Fees |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20140223 |