CN203159147U - Automatic protection device applied to hydraulic controller for forklift and clamp trucks - Google Patents
Automatic protection device applied to hydraulic controller for forklift and clamp trucks Download PDFInfo
- Publication number
- CN203159147U CN203159147U CN 201320088901 CN201320088901U CN203159147U CN 203159147 U CN203159147 U CN 203159147U CN 201320088901 CN201320088901 CN 201320088901 CN 201320088901 U CN201320088901 U CN 201320088901U CN 203159147 U CN203159147 U CN 203159147U
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- relay
- switch
- coil
- open switch
- slug
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Abstract
An automatic protection device applied to a hydraulic controller for forklift and clamp trucks comprises a key switch, an intermediate relay, a main contactor, a first delay relay and a second delay relay. A coil of the main contactor is connected with a normally-closed switch of the first delay relay, a coil of the delay relay is connected with a normally-closed switch of the intermediate relay, a coil of the second delay relay is connected with a normally-open switch of the intermediate relay, a coil of the intermediate relay is connected with the key switch to form four branch circuits, the four branch circuits are connected in parallel and then connected between an auxiliary contact of an emergency stop switch and a low-potential end of a negative electrode of a main power supply, a positive electrode of a storage battery is connected with a high-potential end of a positive electrode of the main power supply through a normally-open switch of the main contactor, a negative electrode of the storage battery is connected with a low-potential end of the negative electrode of the main power supply, and the connection point of the coil of the second delay relay and the normally-open switch of the intermediate relay is connected with a control power supply end through a normally-open switch of the second delay relay. By the aid of the automatic protection device, use safety under abnormal conditions can be ensured, and accidents such as a fire disaster are eliminated.
Description
Technical field
The utility model relates to fork and embraces driving skills art field, specifically is a kind of automatic safety device that is used on the fork armful car hydraulic control pump.
Background technology
In the production and article transport process of tobacco business, the use of fork armful car is very frequent, and usage quantity is also very many.Wherein, what electrodynamic balance pitched heavily that the steering swivel system of embracing car series uses is the hydraulic pressure assisted diversion, the primary circuit designer considers fork armful car direct system priority principle in use, so hydraulic electric motor is started working when the storage battery plug is connected to fork and embraces a car and open key, guarantees the steering swivel system priority task.But when the control system fender guard lost efficacy; if run into the controller internal short-circuit; owing to do not disconnect storage battery; short circuit current continues to flow through this controller; cause the controller temperature to continue to raise; make the sealing colloid produce bigger smog and flame, thereby can cause that the fire short circuit current can be converted to heat energy, but constantly tired the collection produces the black smoke fire hazard to heat.
Summary of the invention
The utility model provides a kind of automatic safety device that is used on the fork armful car hydraulic control pump; can embrace under the situation of the intralamellar part short circuit of car fluid control and self-protection failure of apparatus at fork, prevent because of the overheated generation that causes accidents such as fire, goods fall of fluid control plate.
A kind of automatic safety device that is used on the fork armful car hydraulic control pump, comprise key switch, intermediate relay, the intermediate relay normally closed switch, the intermediate relay normal open switch, main contactor, the main contactor normal open switch, first slug relay, first slug relay's normally closed switch, second slug relay, second slug relay's normal open switch, hydraulic control pump is provided with the anodal hot end of main power source, the control power end, main power source negative pole cold end, the positive pole of storage battery is connected with emergency stop switch, the coil of main contactor and first slug relay's normally closed switch are connected to form first branch road, the coil of first slug relay and intermediate relay normally closed switch are connected to form second branch road, the coil of second slug relay and intermediate relay normal open switch are connected to form the 3rd branch road, the coil of intermediate relay and key switch are connected to form the 4th branch road, first branch road, second branch road, be connected on after the 3rd branch road and the 4th branch road parallel connection between the main power source negative pole cold end of the secondary contact of emergency stop switch and hydraulic control pump; The positive pole of storage battery is connected by the anodal hot end of main contactor normal open switch and main power source, and the negative pole of storage battery is connected with main power source negative pole cold end; The coil of second slug relay is connected with the control power end by second slug relay's normal open switch with the point of connection of intermediate relay normal open switch.
Aforesaid automatic safety device, the delay working time of first slug relay is greater than the delay working time of second slug relay.
Aforesaid automatic safety device, the delay working time of first slug relay is 10s, the delay working time of second slug relay is 5s.
The utility model increases automatic safety device by embracing the car hydraulic control pump at existing fork, compares with the hydraulic control pump of existing no automatic safety device, can guarantee the safe handling under abnormal condition, and is perfectly safe, the generation of stopping accidents such as fire.
Description of drawings
Fig. 1 is that the utility model is used in the circuit diagram that fork is embraced the automatic safety device on the car hydraulic control pump.
Among the figure: 1-storage battery, 2-emergency stop switch, 3-key switch, 4-hydraulic control pump, the anodal hot end of 41-main power source, 42-control power end, 43-main power source negative pole cold end, ZJ-intermediate relay, ZJ1-intermediate relay normally closed switch, ZJ2-intermediate relay normal open switch, C-main contactor, C1-main contactor normal open switch, KT1-first slug relay, KT11-first slug relay normally closed switch, KT2-second slug relay, KT21-second slug relay normal open switch.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model, the technical scheme in the utility model is clearly and completely described.
Figure 1 shows that the utility model is used in the circuit diagram that fork is embraced the automatic safety device on the car hydraulic control pump, the described automatic safety device that is used on the fork armful car hydraulic control pump comprises key switch 3, intermediate relay ZJ, intermediate relay normally closed switch ZJ1, intermediate relay normal open switch ZJ2, main contactor C, main contactor normal open switch C1, first KT1 of slug relay, the first normally closed switch KT11 of slug relay, second KT2 of slug relay, the second normal open switch KT21 of slug relay.
As shown in Figure 1, hydraulic control pump 4 is provided with the anodal hot end 41 of main power source, control power end 42, main power source negative pole cold end 43, and the positive pole of storage battery 1 is connected with emergency stop switch 2.
The coil of main contactor C is connected the back and forms first branch road with the first normally closed switch KT11 of slug relay, the coil of first KT1 of slug relay and intermediate relay normally closed switch ZJ1 are connected to form second branch road, the coil of second KT2 of slug relay and intermediate relay normal open switch ZJ2 are connected to form the 3rd branch road, the coil of intermediate relay and key switch are connected to form the 4th branch road, are connected on after first branch road, second branch road, the 3rd branch road and the 4th branch road parallel connection between the main power source negative pole cold end of the secondary contact of emergency stop switch and hydraulic control pump.
The positive pole of storage battery 1 is connected with the anodal hot end 41 of the main power source of hydraulic control pump 4 by main contactor normal open switch C1, and the negative pole of storage battery 1 is connected with main power source negative pole cold end 43; The coil of second KT2 of slug relay is connected with the control power end 42 of hydraulic control pump 4 by the second normal open switch KT21 of slug relay with the point of connection of intermediate relay normal open switch ZJ2.
As seen from Figure 1, the coil of intermediate relay ZJ is got positive electricity from key switch 3 rear ends, and an end of the coil of main contactor C and 2 slug relays (KT1, KT2) is got positive electricity from emergency stop switch 2 secondary contact rear ends; The other end is got negative electricity from main power source negative pole cold end 43 (that is negative pole of storage battery 1).
Principle of work of the present utility model is described below:
Embrace car when fork and plug storage battery 1, (be in when taking state) when emergency stop switch 2 is closed, control loop does not have power supply to enter, and the main contactor C open circuit of hydraulic control pump guarantees that main power source does not enter controller; Open and key switch 3 when closing when emergency stop switch 2, got this moment electricly by key switch 3 control control loops, the main contactor C of hydraulic control pump still opens a way, and main power source does not enter controller.
When key switch 3 is opened (namely closed), the coil of intermediate relay ZJ gets, intermediate relay normally closed switch ZJ1 and intermediate relay normal open switch ZJ2 upset, be that intermediate relay normally closed switch ZJ1 change is often left, cut off the coil of first KT1 of slug relay, first slug relay's normally closed switch KT11 closure makes the coil of main contactor C get electric work, and main contactor normal open switch C1 closure makes main power source enter hydraulic control pump; Intermediate relay normal open switch ZJ2 is turned into the normally closed coil of second KT2 of slug relay that makes and gets, make the second normal open switch KT21 of the slug relay closure by KT2 time-delay certain hour (for example 5s), thereby the hydraulic control pump control loop is got, self check is started working by the back hydraulic control pump, and the vehicle hydraulic motor gets electric work and power is provided and waits for hydraulic work system to turning to.
End-of-job is closed key switch 3 (namely disconnecting), the ZJ coil blackout, ZJ often opens (being intermediate relay normal open switch ZJ2) and reverts to often to open and make the KT2 coil blackout, the second normal open switch KT21 of slug relay often reverts to and opens, make the control loop outage close MOSFET pipe (but the disable motor loop of closing of MOSFET pipe quits work motor), the intermediate relay normally closed switch ZJ1 of KT1 reverts to normally closed, make the KT1 coil get electric work, by KT1 time-delay certain hour (for example 10s), the first normally closed switch KT11 of slug relay is often reverted to be opened, outage by main contactor C coil makes main contactor normal open switch C1 often be reverted to by closure and opens, and the hydraulic control pump primary power source de-energizes stops.
Installing ZJ, C, KT1 and KT2 additional is to enter disconnected main power source behind the control circuit power supply that must guarantee during shutdown to break earlier after the control power supply must wait main power source to enter hydraulic control pump when guaranteeing the vehicle start.If the advanced hydraulic control pump of control power supply will make the MOSFET pipe of hydraulic control pump in running order in advance, motor will the on-line operation meeting produces very big rush current to controller when main power source entered controller by the time, might damage controller or controller is directly scrapped.When quitting work if not first disconnected control loop power supply, make the MOSFET pipe of hydraulic control pump in running order, suddenly the main power source motor that breaks will produce very big regenerative current and can produce impact controller, may damage controller or controller is directly scrapped.
The utility model has solved existing fork and has embraced the problem that car exists in design, have the advantages that cost is low, be easy to safeguard, when hydraulic efficiency pressure system breaks down, the black smoke of rising, operating personal only need be closed key switch or be taken emergency stop switch, this vehicle can cut off main circuit power supply, and black smoke extinguishes automatically, avoids the expansion of fault.
The above; it only is the specific embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly belong to those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (3)
1. one kind is used in the automatic safety device of pitching on armful car hydraulic control pump, it is characterized in that: comprise key switch (3), intermediate relay (ZJ), intermediate relay normally closed switch (ZJ1), intermediate relay normal open switch (ZJ2), main contactor (C), main contactor normal open switch (C1), first slug relay (KT1), first slug relay's normally closed switch (KT11), second slug relay (KT2), second slug relay's normal open switch (KT21), hydraulic control pump (4) is provided with the anodal hot end (41) of main power source, control power end (42), main power source negative pole cold end (43), the positive pole of storage battery (1) is connected with emergency stop switch (2), the coil of main contactor (C) and first slug relay's normally closed switch (KT11) are connected to form first branch road, the coil of first slug relay (KT1) and intermediate relay normally closed switch (ZJ1) are connected to form second branch road, the coil of second slug relay (KT2) and intermediate relay normal open switch (ZJ2) are connected to form the 3rd branch road, the coil of intermediate relay (ZJ) and key switch (3) are connected to form the 4th branch road, first branch road, second branch road, be connected on after the 3rd branch road and the 4th branch road parallel connection between the main power source negative pole cold end (43) of the secondary contact of emergency stop switch (2) and hydraulic control pump (4); The positive pole of storage battery (1) is connected with the anodal hot end of main power source (41) by main contactor normal open switch (C1), and the negative pole of storage battery (4) is connected with main power source negative pole cold end (43); The coil of second slug relay (KT2) is connected with control power end (42) by second slug relay's normal open switch (KT21) with the point of connection of intermediate relay normal open switch (ZJ2).
2. as claimed in claim 1 being used in pitched the automatic safety device of embracing on the car hydraulic control pump, and it is characterized in that: the delay working time of first slug relay (KT1) is greater than the delay working time of second slug relay (KT2).
3. as claimed in claim 2 being used in pitched the automatic safety device of embracing on the car hydraulic control pump, and it is characterized in that: the delay working time of first slug relay (KT1) is 10s, and the delay working time of second slug relay (KT2) is 5s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320088901 CN203159147U (en) | 2013-02-27 | 2013-02-27 | Automatic protection device applied to hydraulic controller for forklift and clamp trucks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320088901 CN203159147U (en) | 2013-02-27 | 2013-02-27 | Automatic protection device applied to hydraulic controller for forklift and clamp trucks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203159147U true CN203159147U (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320088901 Expired - Lifetime CN203159147U (en) | 2013-02-27 | 2013-02-27 | Automatic protection device applied to hydraulic controller for forklift and clamp trucks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203159147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106115548A (en) * | 2016-08-18 | 2016-11-16 | 湖南星邦重工有限公司 | Hoistable platform and control system thereof and control method |
-
2013
- 2013-02-27 CN CN 201320088901 patent/CN203159147U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106115548A (en) * | 2016-08-18 | 2016-11-16 | 湖南星邦重工有限公司 | Hoistable platform and control system thereof and control method |
| CN106115548B (en) * | 2016-08-18 | 2018-12-07 | 湖南星邦重工有限公司 | Hoistable platform and its control system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |