CN201180076Y - Weighing and overload controlling apparatus for electric block - Google Patents
Weighing and overload controlling apparatus for electric block Download PDFInfo
- Publication number
- CN201180076Y CN201180076Y CNU2007201314980U CN200720131498U CN201180076Y CN 201180076 Y CN201180076 Y CN 201180076Y CN U2007201314980 U CNU2007201314980 U CN U2007201314980U CN 200720131498 U CN200720131498 U CN 200720131498U CN 201180076 Y CN201180076 Y CN 201180076Y
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- CN
- China
- Prior art keywords
- electric block
- weighing
- input terminal
- relay
- operational amplifier
- 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.)
- Expired - Fee Related
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- Control And Safety Of Cranes (AREA)
Abstract
The utility model provides a weighing and overloading control device for an electric block, belonging to the automatic control technical field. The utility model aims to provide the weighing and overloading control device which can ensure that the electric block can hoist an article in a rated hoisting range. The weighing and overloading control device comprises the technical point that an inverting input terminal of a first operational amplifier is connected with a contact point for two resistors which are connected in a rectifier output loop in series, while an noninverting input terminal of the first operational amplifier is connected with the output terminal of a force sensor circuit which is connected in the rectifier output loop in series; the output terminal of the first operational amplifier is connected with a digital display device; an inverting input terminal of a second operational amplifier is connected with the contact point for the two resistors which are connected in the rectifier output loop in series; a noninverting input terminal of the second operational amplifier is connected with a noninverting input terminal of the first operational amplifier YF1 in parallel; the output terminal of the second operational amplifier is connected with a relay coil; contact points of a relay respectively control a motor of the electric block and a power supply of an alarm; and a force sensor is connected with a hoisting cable wire in series. The device has the functions of weighing and overloading control.
Description
Technical field
The utility model relates to a kind of weighing and overloading control device of electric block that be used for, and belongs to electric block or automatic control technology field.
Background technology
Electric block is widely used in the every field of national economy as a kind of weight-lifting equipment.But, present electric block is owing to only have the simple function of lifting, article to lifting can not be weighed, therefore, in use, can only rely on the experience of operating personal to be judged to the Item Weight that it lifted by crane, very easily cause the lifting of electric block overload, thereby cause the damage of equipment and the generation of safety misadventure.
Summary of the invention
The purpose of this utility model provides a kind of weighing and overloading control device of electric block that be used for, and it can guarantee that electric block lifts by crane article in specified lifting scope, to guarantee weight-lifting equipment and lifting article and site operation personnel's safety.
Its technical scheme is: a kind ofly be used for weighing and overloading control device of electric block, comprise op amp, force gauge, digital display, relay and rectifier, it is characterized in that: described op amp is two, the inverting terminal of first op amp is connected with the contact of two resistance in being connected on the rectifier output loop, its non-inverting input terminal be connected on the rectifier output loop in the force gauge circuit in mouth be connected, its mouth is connected with digital display; The inverting terminal of second op amp is connected with the contact of two resistance in being connected on the rectifier output loop, its non-inverting input terminal is in parallel with the non-inverting input terminal of first op amp YF1, its mouth is connected with relay coil, and the other end of relay coil is connected with the rectifier output end negative pole; The a pair of normally closed contact of relay is serially connected on the power circuit of electric block motor, and another of relay is serially connected on the power circuit of annunciator to open contact; Force gauge is serially connected in the hoisting wirerope of electric block.
Its technique effect is: because force gauge is serially connected in the hoisting wirerope of electric block, therefore, force gauge changes the weight that electric block lifts by crane article into electric signal, by with op amp to the voltage of the voltage of inverting terminal input and non-inverting input terminal input compare with computing after, the weight that first op amp output electric signal direct control digital display demonstration electric block lifts by crane article at present.If the weight of electric block lifting this moment article is within specified lifting scope, the voltage height of the voltage ratio non-inverting input terminal input of second op amp inverting terminal input, the polarity of its output voltage is born, so relay coil no current, the normally closed contact of relay is connected the motor power of electric block, makes electric block form lifting; If the weight of electric block lifting article exceeds outside the specified lifting scope, then the voltage of the voltage ratio non-inverting input terminal input of second op amp inverting terminal input is low, the polarity of its output voltage is positive, so relay coil has electric current to pass through, make the relay adhesive, its open contact closure, the power circuit of connection annunciator makes annunciator send alerting signal; Simultaneously, the normally closed contact of relay disconnects, and cuts off the motor power of electric block, makes electric block stop lifting.Thereby guarantee that electric block lifts by crane article in specified lifting scope, guaranteed weight-lifting equipment and lifting article and site operation personnel's safety.
Description of drawings
Fig. 1 is the utility model electrical schematic diagram;
Fig. 2 is the electric block structural representation;
Fig. 3 is an electric block handle controller profile scheme drawing.
The specific embodiment
As shown in Figure 1, the inverting terminal of first op amp Y1F is connected with two resistance R 1, the contact of R2 in being connected on rectifier ZL output loop, its non-inverting input terminal be connected on the rectifier output loop in force gauge CG circuit in mouth be connected, the mouth of op amp is connected with digital display XS.The inverting terminal of second op amp YF2 is connected with two resistance R 3, the contact of R4 in being connected on the rectifier output loop, its non-inverting input terminal is in parallel with the non-inverting input terminal of first op amp YF1, its mouth is connected with the relay J coil, and the other end of relay coil is connected with the rectifier output end negative pole.The a pair of normally closed contact BD1 of relay is serially connected on the power circuit of electric block motor D J, and another of relay is serially connected on the power circuit of annunciator BJ open contact BD2.Force gauge is serially connected among the hoisting wirerope GS of electric block.
Op amp, digital display, relay, annunciator and rectifier can be installed in the electric block handle controller SK.The panel of handle controller is provided with numeric display window SC.
The input power supply of rectifier ZL provides 36 volts of source of ACs by electric block electric appliance box DX.
Claims (3)
1, a kind ofly is used for weighing and overloading control device of electric block, comprise op amp, force gauge, digital display, relay and rectifier, it is characterized in that: described op amp is two, the inverting terminal of first op amp (YF1) is connected with the contact of two resistance (R1, R2) in being connected on the rectifier output loop, its non-inverting input terminal respectively be connected on the rectifier output loop in force gauge (CG) circuit in mouth be connected, its mouth is connected with digital display (XS); The inverting terminal of second op amp (YF2) is connected with the contact of two resistance (R3, R4) in being connected on the rectifier output loop, its non-inverting input terminal is in parallel with the non-inverting input terminal of first op amp YF1, its mouth is connected with relay (J) coil, and the other end of relay coil is connected with the rectifier output end negative pole; The a pair of normally closed contact (BD1) of relay is serially connected on the power circuit of electric block motor (DJ), and another of relay is serially connected on the power circuit of annunciator (BJ) open contact (BD2); Force gauge is serially connected in the hoisting wirerope (GS) of electric block.
2, according to claim 1ly be used for weighing and overloading control device of electric block, it is characterized in that: described first and second op amps, digital display, relay, annunciator and rectifiers are installed in the electric block handle controller (SK).
3, according to claim 2ly be used for weighing and overloading control device of electric block, it is characterized in that: the panel of described handle controller (SK) is provided with numeric display window (SC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201314980U CN201180076Y (en) | 2007-12-14 | 2007-12-14 | Weighing and overload controlling apparatus for electric block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201314980U CN201180076Y (en) | 2007-12-14 | 2007-12-14 | Weighing and overload controlling apparatus for electric block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201180076Y true CN201180076Y (en) | 2009-01-14 |
Family
ID=40249575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201314980U Expired - Fee Related CN201180076Y (en) | 2007-12-14 | 2007-12-14 | Weighing and overload controlling apparatus for electric block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201180076Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913538A (en) * | 2010-08-18 | 2010-12-15 | 尹波 | Hoist |
| CN104692274A (en) * | 2015-03-31 | 2015-06-10 | 浙江冠林机械有限公司 | Electric block with protector |
-
2007
- 2007-12-14 CN CNU2007201314980U patent/CN201180076Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913538A (en) * | 2010-08-18 | 2010-12-15 | 尹波 | Hoist |
| CN101913538B (en) * | 2010-08-18 | 2013-06-12 | 尹波 | Hoist |
| CN104692274A (en) * | 2015-03-31 | 2015-06-10 | 浙江冠林机械有限公司 | Electric block with protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20100114 |