CN201647894U - Hoist limit switch - Google Patents
Hoist limit switch Download PDFInfo
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- CN201647894U CN201647894U CN2010202992992U CN201020299299U CN201647894U CN 201647894 U CN201647894 U CN 201647894U CN 2010202992992 U CN2010202992992 U CN 2010202992992U CN 201020299299 U CN201020299299 U CN 201020299299U CN 201647894 U CN201647894 U CN 201647894U
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- inductive switch
- winch
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Abstract
The utility model belongs to the technical field of the reliability of lifting protection of a hoist, in particular to a hoist limit switch, comprising an insulating fixed plate. The insulating fixed plate is fixed on a lifting drum of the hoist; the insulating fixed plate is provided with an inductive switch SP1 and an inductive switch SP2, which are respectively arranged on two sides of a steel rope of the hoist and corresponding to the steel rope; the inductive switch SP1 and the inductive switch SP2 are respectively connected to a limit circuit through a power cord; the insulating fixed plate is arranged on the lifting drum by means of a theory that the steel rope on the drum does regular transverse uniform movement when the hoist is lifting; the insulating fixed plate is provided with the inductive switches corresponding to the liming position of the transverse moving the steel rope; the inductive switches induct the steel rope at the limiting position and transfer the inductive signals to an intermediate relay that controls a contactor; the contactor controls the lift operation of the hoist, thereby reaching a purpose of self-protection of the hoist.
Description
Technical field:
The utility model belongs to winch lifting protection reliability engineering field, is specifically related to a kind of winch limit switch.
Background technology:
Travel switch claims limit switch again, is used to control the stroke and the position limitation protection of mechanical equipment.In actual production, travel switch is installed in prearranged position, during module impact stroke switch on being loaded on the manufacturing machine movable parts, the action of the contact of travel switch realizes the switching of circuit.Therefore, travel switch be a kind of according to movable parts travel position and the electrical equipment of commutation circuit, its action principle and button are similar.Travel switch is widely used in all kinds of lathes and elevator machinery, in order to control its stroke, to carry out the terminal position limitation protection.Limit switch is exactly the switch of a band normally-open normally-close in fact, special is that it is the end position that is contained in transmission device, when thereby equipment operation just makes switch motion reach the control purpose by the button or the rocking arm of touching switch to this position the time. there are a lot of sensors can serve as this role, resemble photoelectric switch, near switch, rang sensor or the like.
The traditional cucurbit lifting limit switch of lifting industry has weight hammer type, two kinds of forms of counter at present, its price of the limit switch of these two kinds of forms is very expensive, counter limit switch particularly, the counter limit switch that uses on China's hoisting crane is gone back dependence on import greatly at present, its cost is quite expensive, and under the production environment of high dust, high temperature, high-intensity magnetic field, often be out of order, safety, the economical operation of electric block there has been very big threat.Therefore, seek a kind of reliability and durability, economical and practical and limit switch that can adapt to abominable running environment still difficult problem concerning those skilled in the art.
The utility model content:
In sum; in order to overcome the deficiency of prior art problem; the utility model provides a kind of winch limit switch; it is to utilize winch when lifting; the well-regulated laterally even shifting principle of steel rope on the reel; the insulation adapter plate is set on reel; the cooresponding inductive switch of end position of the side travel of setting and steel rope on the insulation adapter plate; inductive switch is responded to steel rope at end position; and induced signal passed to intermediate relay; the intermediate relay control contactor, contactor control winch descending operation, thus reach purpose to winch self-protection.
For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that
A kind of winch limit switch, wherein: it comprises the insulation adapter plate, the insulation adapter plate is fixed on the reel of winch, the insulation adapter plate is provided with inductive switch SP1 and inductive switch SP2, inductive switch SP1 and inductive switch SP2 are separately positioned on the both sides of the steel rope of winch, and all corresponding with steel rope, inductive switch SP1 and inductive switch SP2 connect limit circuit by power lead respectively.
Further, described limit circuit comprises power circuit and control circuit, power circuit is the electrical motor positive and negative rotation circuit, it comprises the main contact KM13 of contactless switch KM1, terminals a1, the a2 of main contact KM13, b1, b2, c1, c2 connect terminals u1, u2, v1, v2, w1, the w2 of electrical motor respectively, and terminals d1, the d2 of the main contact KM23 of contactless switch KM2, e1, e2, f1, f2 connect terminals w1, w2, v1, u2, u1, the v2 of electrical motor respectively; Described control circuit comprises main switch SB, and main switch SB connects inductive switch SP1, inductive switch SP2, hand switch SB1 and hand switch SB2, and inductive switch SP1 connects the coil K10 of intermediate relay K1; Inductive switch SP2 connects the coil K20 of intermediate relay K2; Hand switch SB1 connects the auxiliary normally closed contact KM22 of contactless switch KM2, auxiliary normally closed contact KM22 connects the coil KM10 of contactless switch KM1, coil KM10 connects the normally closed contact K22 of intermediate relay K2, and the auxiliary open contact KM11 of the open contact K11 of intermediate relay K1 and contactless switch KM1 is in parallel with hand switch SB1 respectively; Hand switch SB2 connects the auxiliary normally closed contact KM12 of contactless switch KM1, auxiliary normally closed contact KM12 connects the coil KM20 of contactless switch KM2, coil KM20 connects the normally closed contact K12 of intermediate relay K1, and the auxiliary open contact KM21 of the open contact K21 of intermediate relay K2 and contactless switch KM2 is in parallel with hand switch SB2 respectively.
Further, the position of the steel rope during the suspender lowest order of described inductive switch SP1 and winch is corresponding, and the position of inductive switch SP2 and the winch steel rope when most significant bit is corresponding.
Further, described inductive switch SP1 and inductive switch SP2 are the metal inductive switch.
The beneficial effects of the utility model are:
1, the utility model is to utilize winch when lifting; the well-regulated laterally even shifting principle of steel rope on the reel; insulcrete is set on reel; two inductive switches are set on insulcrete; two inductive switches are corresponding with the end position of the side travel of steel rope respectively; inductive switch is responded to steel rope at end position; and induced signal passed to intermediate relay; the intermediate relay control contactor; contactor control winch descending operation, thus reach purpose to winch self-protection.
2, the utility model is simple in structure, with low cost, induction is sensitive, induction precision is high, safety can be high, can adapt to abominable production environments such as high dust, high temperature, high-intensity magnetic field, under harsh environment, guarantee the normal operation of winch, original weight hammer type and counter limit switch can have been replaced, reduce the maintenance cost of winch, and then reduce the productive costs of enterprise.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the utility model circuit diagram.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As Fig. 1, shown in Figure 2, a kind of winch limit switch, it comprises insulation adapter plate 1, insulation adapter plate 3 is fixed on the reel 1 of winch, insulation adapter plate 3 is provided with inductive switch SP1 and inductive switch SP2, inductive switch SP1 and inductive switch SP2 are the metal inductive switch, inductive switch SP1 and inductive switch SP2 are separately positioned on the both sides of the steel rope 2 of winch, the position of the steel rope 2 during the suspender lowest order of inductive switch SP1 and winch is corresponding, the position of inductive switch SP2 and the winch steel rope 2 when most significant bit is corresponding, inductive switch SP1 and inductive switch SP2 connect limit circuit by power lead respectively, limit circuit comprises power circuit and control circuit, power circuit is the electrical motor positive and negative rotation circuit, it comprises the main contact KM13 of contactless switch KM1, the terminals a1 of main contact KM13, a2, b1, b2, c1, c2 connects the terminals u1 of electrical motor respectively, u2, v1, v2, w1, w2, the terminals d1 of the main contact KM23 of contactless switch KM2, d2, e1, e2, f1, f2 connects the terminals w1 of electrical motor respectively, w2, v1, u2, u1, v2; Described control circuit comprises main switch SB, and main switch SB connects inductive switch SP1, inductive switch SP2, hand switch SB1 and hand switch SB2, and inductive switch SP1 connects the coil K10 of intermediate relay K1; Inductive switch SP2 connects the coil K20 of intermediate relay K2; Hand switch SB1 connects the auxiliary normally closed contact KM22 of contactless switch KM2, auxiliary normally closed contact KM22 connects the coil KM10 of contactless switch KM1, coil KM10 connects the normally closed contact K22 of intermediate relay K2, and the auxiliary open contact KM11 of the open contact K11 of intermediate relay K1 and contactless switch KM1 is in parallel with hand switch SB1 respectively; Hand switch SB2 connects the auxiliary normally closed contact KM12 of contactless switch KM1, auxiliary normally closed contact KM12 connects the coil KM20 of contactless switch KM2, coil KM20 connects the normally closed contact K12 of intermediate relay K1, and the auxiliary open contact KM21 of the open contact K21 of intermediate relay K2 and contactless switch KM2 is in parallel with hand switch SB2 respectively.
During use, start main supply switch SB, press hand switch SB1 then, hand switch SB1 is communicated with the auxiliary normally closed contact KM22 of contactless switch KM2, auxiliary normally closed contact KM22 is communicated with the coil KM10 of contactless switch KM1, coil KM10 is communicated with the normally closed contact K22 of intermediate relay K2, thereby make the charged generation magnetic of coil KM10, make the auxiliary open contact KM11 closure of contactless switch KM1, the auxiliary normally closed contact KM12 of contactless switch KM1 disconnects, the main contact KM13 closure of contactless switch KM1, and then electrical motor just changes, winch is risen, and the steel rope 2 on the reel 1 evenly moves left.
Press hand switch SB2, hand switch SB2 is communicated with the auxiliary normally closed contact KM12 of contactless switch KM1, auxiliary normally closed contact KM12 is communicated with the coil KM20 of contactless switch KM2, coil KM20 is communicated with the normally closed contact K12 of intermediate relay K1, make the charged generation magnetic of coil KM20, be the auxiliary open contact KM21 closure of contactless switch KM2, auxiliary normally closed contact KM22 disconnects the main contact KM23 closure of contactless switch KM2.The main contact KM13 closure of contactless switch KM1 makes the coil KM10 outage of contactless switch KM1, and main contact KM13 disconnects.The main contact KM23 closure of contactless switch KM2 reverses electrical motor, thereby winch is descended, and the steel rope 2 on the reel 1 evenly moves to the right.
When winch rises to vertex; steel rope 2 is moved to the left the left end end position; inductive switch SP2 senses steel rope 2; the coil K20 of main switch SB and intermediate relay K2 is got; coil K20 disconnects the normally closed contact K22 of relay K 2; make its open contact K21 closure; thereby make the coil KM10 outage of contactless switch KM1, contactless switch KM1 main contact KM13 disconnect, simultaneously; the coil KM20 of contactless switch KM2 is got; the main contact KM23 closure of contactless switch KM2, thus make electrical motor by just changing reverse into, make winch be transformed to decline by rising; steel rope 2 on the reel 1 is evenly moved to the right; when inductive switch SP2 responds to less than steel rope 2, coil K20 dead electricity, normally closed contact K22 closure; open contact K21 disconnects; coil KM20 outage, main contact KM23 disconnects, the electrical motor stall; winch quits work, thereby realizes the self-protection of winch.
When winch drops to nadir; steel rope 2 moves right to extreme right position; inductive switch SP1 senses steel rope 2; the coil K10 of main switch SB and intermediate relay K1 is got; coil K10 disconnects the normally closed contact K12 of relay K 1; make its open contact K11 closure; thereby make the coil KM20 outage of contactless switch KM2, contactless switch KM2 main contact KM23 disconnect, simultaneously; the coil KM10 of contactless switch KM1 is got; the main contact KM13 closure of contactless switch KM1 is changeed thereby electrical motor is just become by reverse, makes winch be transformed to rising by decline; steel rope 2 on the reel 1 is evenly moved left; when inductive switch SP1 responds to less than steel rope 2, coil K10 dead electricity, normally closed contact K12 closure; open contact K11 disconnects; coil KM10 outage, main contact KM13 disconnects, the electrical motor stall; winch quits work, thereby realizes the self-protection of winch.
Be noted that, the above embodiment is to the explanation of technical solutions of the utility model and unrestricted, other modification that is equal to replacement or makes of affiliated technical field those of ordinary skill according to prior art, as long as do not exceed the thinking and the scope of technical solutions of the utility model, all should be included within the desired interest field of the utility model.
Claims (4)
1. winch limit switch, it is characterized in that: it comprises the insulation adapter plate, the insulation adapter plate is fixed on the reel of winch, the insulation adapter plate is provided with inductive switch SP1 and inductive switch SP2, inductive switch SP1 and inductive switch SP2 are separately positioned on the both sides of the steel rope of winch, and all corresponding with steel rope, inductive switch SP1 and inductive switch SP2 connect limit circuit by power lead respectively.
2. winch limit switch according to claim 1, it is characterized in that: described limit circuit comprises power circuit and control circuit, power circuit is the electrical motor positive and negative rotation circuit, it comprises the main contact KM1-3 of contactless switch KM1, terminals a1, the a2 of main contact KM1-3, b1, b2, c1, c2 connect terminals u1, u2, v1, v2, w1, the w2 of electrical motor respectively, and terminals d1, the d2 of the main contact KM2-3 of contactless switch KM-2, e1, e2, f1, f2 connect terminals w1, w2, v1, u2, u1, the v2 of electrical motor respectively; Described control circuit comprises main switch SB, and main switch SB connects inductive switch SP1, inductive switch SP2, hand switch SB1 and hand switch SB2, and inductive switch SP1 connects the coil K1-0 of intermediate relay K1; Inductive switch SP2 connects the coil K2-0 of intermediate relay K2; Hand switch SB1 connects the auxiliary normally closed contact KM2-2 of contactless switch KM2, auxiliary normally closed contact KM2-2 connects the end of the coil KM1-0 of contactless switch KM1, the other end of the coil KM1-0 of contactless switch KM1 connects the normally closed contact K2-2 of intermediate relay K2, and the auxiliary open contact KM1-1 of the open contact K1-1 of intermediate relay K1 and contactless switch KM1 is in parallel with hand switch SB1 respectively; Hand switch SB2 connects the auxiliary normally closed contact KM1-2 of contactless switch KM1, auxiliary normally closed contact KM1-2 connects the end of the coil KM2-0 of contactless switch KM2, the other end of the coil KM2-0 of contactless switch KM2 connects the normally closed contact K1-2 of intermediate relay K1, and the auxiliary open contact KM2-1 of the open contact K2-1 of intermediate relay K2 and contactless switch KM2 is in parallel with hand switch SB2 respectively.
3. winch limit switch according to claim 1 and 2 is characterized in that: the position of the steel rope during the suspender lowest order of described inductive switch SP1 and winch is corresponding, and the position of inductive switch SP2 and the winch steel rope when most significant bit is corresponding.
4. winch limit switch according to claim 3 is characterized in that: described inductive switch SP1 and inductive switch SP2 are the metal inductive switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202992992U CN201647894U (en) | 2010-08-20 | 2010-08-20 | Hoist limit switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202992992U CN201647894U (en) | 2010-08-20 | 2010-08-20 | Hoist limit switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201647894U true CN201647894U (en) | 2010-11-24 |
Family
ID=43113124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202992992U Expired - Fee Related CN201647894U (en) | 2010-08-20 | 2010-08-20 | Hoist limit switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201647894U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086293A (en) * | 2011-10-28 | 2013-05-08 | 淮南矿业(集团)有限责任公司 | Safety system of mining winch |
| CN104375428B (en) * | 2014-11-03 | 2017-02-15 | 江苏柳工机械有限公司 | Lifting industrial test control system of scissors fork type high-altitude operation platform |
-
2010
- 2010-08-20 CN CN2010202992992U patent/CN201647894U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086293A (en) * | 2011-10-28 | 2013-05-08 | 淮南矿业(集团)有限责任公司 | Safety system of mining winch |
| CN103086293B (en) * | 2011-10-28 | 2015-08-19 | 淮南矿业(集团)有限责任公司 | Mine winch safety system |
| CN104375428B (en) * | 2014-11-03 | 2017-02-15 | 江苏柳工机械有限公司 | Lifting industrial test control system of scissors fork type high-altitude operation platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20140820 |
|
| EXPY | Termination of patent right or utility model |