CN203767921U - Crane and winch brake control system thereof - Google Patents
Crane and winch brake control system thereof Download PDFInfo
- Publication number
- CN203767921U CN203767921U CN201420111955.XU CN201420111955U CN203767921U CN 203767921 U CN203767921 U CN 203767921U CN 201420111955 U CN201420111955 U CN 201420111955U CN 203767921 U CN203767921 U CN 203767921U
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- brake
- hoist
- control system
- oil
- communicated
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Abstract
The utility model discloses a crane and a winch brake control system thereof. The control system comprises a winch motor and a winch brake; the winch brake is communicated with a down opening of the winch motor and further communicated with a brake oil inlet pipe or a brake oil outlet pipe through a directional control valve, and the oil pipe communicated with an upper opening of the winch motor is provided with an oil pressure sensor. The control system further comprises a controller, and the controller is configured to control a first signal according to output signals of the oil pressure sensor when the directional control valve is switched to communicate the winch brake with the brake oil inlet pipe and to control a second signal according to output signals of the heavy object lifting finishing when the directional control valve is switched to communicate the winch brake with the brake oil outlet pipe. Therefore, during the heavy object lifting, the winch brake can be started after some pressure is built in a hydraulic system, and namely, the start time of the winch brake can be controlled, so that the second falling of heavy objects in lifting can be effectively prevented.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly relates to a kind of elevator braking control system of hoisting crane.In addition, the utility model also relates to a kind of hoisting crane that comprises above-mentioned elevator braking control system.
Background technology
In the working process of hoisting crane, hoisting system is responsible for weight promote or put down, in this process, often weight temporarily need to be stayed for some time at a certain height, whether the braking of hoisting system can stably rest on the conclusive effect that plays in the air to weight.
Existing elevator machinery, when weight hoists or falls, hoist brake is all got oil from working connection.As shown in Figure 1, Fig. 1 is the hydraulic schematic diagram of elevator braking control system in prior art.
Under normality, hoist brake 12, in closed condition, limits the action of hoist motor 11.When weight hoists, hydraulic efficiency pressure system is got oil from the A that opens of hoist motor 11, and hydraulic oil enters hoist brake 12 after shuttle valve 13, reducing valve 14, opens hoist brake 12, remove the braking to hoist motor 11, hoist motor 11 is controlled the inside rope closing of elevator so that weight hoists; When weight falls, hydraulic efficiency pressure system is got oil from mouthful B that falls of hoist motor 11, hydraulic oil enters hoist brake 12 after shuttle valve 13, reducing valve 14, open hoist brake 12, remove the braking to hoist motor 11, hoist motor 11 control elevator outwards put rope so that weight fall, after weight falls to finishing, cutting-off liquid pressing system oil circuit, the hydraulic oil of hoist brake 12 is discharged by check valve 15, shuttle valve 13, hoist brake 12 is closed, and realizes the braking to hoist motor 11, prevents that weight from continuing to fall.
And there is following problems in above-mentioned elevator braking control system:
When weight hoists or falls, hoist brake 12 is all got oil from the working connection of hydraulic efficiency pressure system, the opening time of uncontrollable hoist brake 12; In the time that weight hoists, hydraulic efficiency pressure system is not set up certain pressure, and the drive torque of hoist motor 11 does not fully form, and because the opening time of hoist brake 12 is uncontrollable, if now hoist brake 12 has been opened, easily causes the secondary of weight to fall;
Hoist brake 12 is without independent leakage passage, and draining is slow, and after weight falls to finishing, hoist brake is draining in time, realizes the braking to hoist motor 11, thereby causes weight to continue to decline, and occurs stall phenomenon seriously time.
In view of this, how improving the elevator braking control system of hoisting crane, to control the opening time of hoist brake, secondary occurs while avoiding weight to hoist, is the current technical issues that need to address of those skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of elevator braking control system of hoisting crane, can control the opening time of hoist brake, and secondary occurs while avoiding weight to hoist.Another object of the present utility model is to provide a kind of hoisting crane that comprises above-mentioned elevator braking control system.
For solving the problems of the technologies described above, the utility model provides a kind of elevator braking control system of hoisting crane, comprises hoist motor and hoist brake; Described hoist brake is communicated with the mouth that falls of described hoist motor; Described hoist brake is also communicated with braking oil-feed oil circuit or braking draining oil circuit by directional control valve; On the oil circuit being communicated with opening of described hoist motor, be provided with oil pressure sensor;
Also comprise controller, be configured to control described directional control valve according to the signal output of described oil pressure sensor and switch to the first signal that described hoist brake is communicated with braking oil-feed oil circuit; And the hoist signal output that finishes is controlled described directional control valve and is switched to described hoist brake and the secondary signal of braking draining oil circuit and being communicated with according to weight.
The elevator braking control system that the utility model provides is provided with braking oil-feed oil circuit and braking draining oil circuit, in the time that weight hoists, the fuel injection pressure signal that hoist brake records according to oil pressure sensor is got oil from braking oil-feed oil circuit, thereby can set up after certain pressure in hydraulic efficiency pressure system, open hoist brake, can control the opening time of hoist brake, secondary occurs while effectively avoiding weight to hoist.
Preferably, the mouth that falls of described hoist motor is provided with reducing valve to the oil circuit of described hoist brake.
Preferably, the outlet of described reducing valve separates a branch road that is communicated with braking draining oil circuit, is provided with check valve and damping on described branch road.
So arrange, after weight falls to finishing, hoist brake can, by braking draining oil circuit draining, be realized the snap catch to hoist motor, avoids weight to continue to decline, and prevents the appearance of stall phenomenon.
Preferably, also comprise shuttle valve, two oil inlet is communicated with the actuator port of described directional control valve, the outlet of described reducing valve respectively, and its oil outlet is communicated with described hoist brake.
Preferably, described directional control valve is electromagnetic valve.
Preferably, described hoist brake is normally closed brake.
The utility model also provides a kind of hoisting crane, comprises the control system of hoist brake and the work of control hoist brake, and the control system of described control hoist brake work is the elevator braking control system described in above-mentioned any one.
Because above-mentioned elevator braking control system has above-mentioned technique effect, so comprise that the hoisting crane of this elevator braking control system also has corresponding technique effect, it is no longer repeated here.
Brief description of the drawings
Fig. 1 is the hydraulic schematic diagram of elevator braking control system in prior art;
Fig. 2 provides the hydraulic schematic diagram of elevator braking control system for the utility model.
In Fig. 1:
Hoist motor 11, hoist brake 12, shuttle valve 13, reducing valve 14, check valve 15;
In Fig. 2:
Hoist motor 21, hoist brake 22, shuttle valve 23, reducing valve 24, check valve 25, electromagnetic valve 26, damping 27, oil pressure sensor 28.
Detailed description of the invention
Core of the present utility model is to provide a kind of elevator braking control system of hoisting crane, can control the opening time of hoist brake, and secondary occurs while avoiding weight to hoist.Another core of the present utility model is to provide a kind of hoisting crane that comprises above-mentioned elevator braking control system.
In order to make those skilled in the art person understand better the utility model scheme, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 2, Fig. 2 provides the hydraulic schematic diagram of elevator braking control system for the utility model.
In this embodiment, the elevator braking control system of hoisting crane comprises hoist motor 21 and hoist brake 22; Hoist brake 22 is communicated with mouthful B that falls of hoist motor 21, is also communicated with braking oil-feed oil circuit X or braking draining oil circuit L by directional control valve 26; On the oil circuit being communicated with the A that opens of hoist motor 21, be provided with oil pressure sensor 28.
Described elevator braking control system also comprises controller, and described controller is configured to control directional control valve 26 according to the signal output of oil pressure sensor 28 and switches to the first signal that hoist brake 22 is communicated with braking oil-feed oil circuit X; And the hoist signal output that finishes is controlled directional control valve 26 and is switched to hoist brake 22 and the secondary signal of braking draining oil circuit L and being communicated with according to weight.
Here it is to be noted, the mode of operation of the elevator that herein open A and mouthful B that falls of mentioned hoist motor 21 drive based on this hoist motor 21 is benchmark definition, that is to say, system pressure oil circuit is communicated with the A that opens of hoist motor 21, elevator is done inside serving action, system pressure oil circuit is communicated with mouthful B that falls of hoist motor 21, and elevator is outwards put rope action.
In concrete scheme, hoist brake 22 is normally closed brake, and, under normality, hoist brake 22, in closed condition, limits the action of hoist motor 21; When hoist brake 22 is opened, remove the braking to hoist motor 21, hoist motor 21 can be controlled the inside rope closing of elevator or outwards put rope.
When weight hoists, hoist brake 22 is got oil from braking oil-feed oil circuit X, when the pressure of system pressure oil circuit is established to certain value, controller is according to the fuel injection pressure signal control directional control valve 26 of oil pressure sensor 28, make it switch to the state that braking oil-feed oil circuit X is communicated with hoist brake 22, the hydraulic oil of braking oil-feed oil circuit X enters hoist brake 22, opens hoist brake 22, remove the braking to hoist motor 21, realize steadily hoisting of weight; In this process, the opening time of hoist brake 22 is controlled, thereby secondary occurs can effectively avoid weight to hoist time.
After weight hoists and finishes, controller is according to the signal control directional control valve 26 receiving, make it switch to the state that braking draining oil circuit L is communicated with hoist brake 22, hydraulic oil in hoist brake 22 flows out from braking draining oil circuit L by directional control valve 26, realize the quick closedown of hoist brake 22, prevent elevator generation reversal development.
Here it is pointed out that when weight hoists, the force value that system pressure oil circuit need to be set up can be obtained by test or emulation, according to the required setting of reality.
In this embodiment, mouthful B that falls of hoist motor 21 is provided with reducing valve 24 to the oil circuit of hoist brake 22; When weight falls, when the hydraulic oil of system pressure oil circuit enters hoist motor 21 from mouthful B that falls, hoist brake 22 is got oil by mouthful B that falls of hoist motor 21, the high pressure oil of obtaining can be by entering hoist brake 22 after reducing valve 24 decompressions, open hoist brake 22, remove the braking to hoist motor 21, thereby hoist motor 21 is controlled, elevator is outwards put rope so that weight falls.
Further, the outlet of reducing valve 24 separates a branch road that is communicated with braking draining oil circuit L, is provided with check valve 25 and damping 27 on this branch road.
So arrange, when weight falls, hoist brake 22 is got oil from mouthful B that falls of hoist motor 21, high pressure oil is after reducing valve 24 decompressions, enter hoist brake 22, because the outlet of reducing valve 24 separates the branch road that is communicated with braking draining oil circuit L, thereby can regulate the opening time of hoist brake 22 through overdamping 27 and check valve 25 oil circuits, and then mate the characteristic of elevator braking; After weight falls to finishing, hydraulic oil in hoist brake 22 can flow out through braking draining oil circuit L, and regulates the shut of hoist brake 22 by damping 27 and check valve 25, can realize elevator quick closedown, thereby avoid weight to continue to fall, prevent the appearance of stall phenomenon.
Further, described elevator braking control system also comprises shuttle valve 23, two oil inlets of this shuttle valve 23 are communicated with the actuator port (hydraulic fluid port being communicated with hoist brake 22) of directional control valve 26, the outlet of reducing valve 24 respectively, and the oil outlet of this shuttle valve 23 is communicated with hoist brake 22.
So arrange, the outlet of reducing valve 24, the actuator port of directional control valve 26, to only an oil circuit being set between hoist brake 22, can be simplified the structure of elevator braking control system, are convenient to arrange.
Now, when weight hoists, the hydraulic oil of controlling hoist brake 22 enters hoist brake 22 through directional control valve 26 and shuttle valve 23, after weight hoists and finishes, the hydraulic oil in hoist brake 22 can flow out from braking draining oil circuit L by directional control valve 26 or by check valve 25, damping 27 through shuttle valve 23.
When weight falls, hoist brake 22 is got oil from mouthful B that falls of hoist motor 21, enter hoist brake 22 through reducing valve 24, shuttle valve 23, after weight falls to finishing, the hydraulic oil of hoist brake 22 flows out from braking draining oil circuit L by check valve 25, damping 27 through shuttle valve 23.
In the various embodiments described above, described directional control valve 26 can be electromagnetic valve, automatically controls with adaptive system.
The elevator braking control system of the hoisting crane that the utility model provides, can control rising and falling the time of elevator braking, the well characteristic of coupling elevator braking, prevent double slide, and be provided with independent braking leakage passage, can realize the quick closedown of hoist brake, prevent elevator reversion, improve safety and reliability.
Except above-mentioned elevator braking control system, the utility model also provides a kind of hoisting crane, the control system that comprises hoist brake and the work of control hoist brake, the control system of described control hoist brake work is the elevator braking control system described in above-mentioned any one.
Because above-mentioned elevator braking control system has above-mentioned technique effect, so comprise that the hoisting crane of this elevator braking control system also has corresponding technique effect, it is no longer repeated here.
Above hoisting crane provided by the utility model and elevator braking control system thereof are described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (7)
1. an elevator braking control system for hoisting crane, comprises hoist motor (21) and hoist brake (22); Described hoist brake (22) is communicated with described hoist motor (21) fall mouthful (B); It is characterized in that, described hoist brake (22) is also communicated with braking oil-feed oil circuit (X) or braking draining oil circuit (L) by directional control valve (26); On the oil circuit being communicated with open (A) of described hoist motor (21), be provided with oil pressure sensor (28);
Also comprise controller, be configured to control described directional control valve (26) according to the signal output of described oil pressure sensor (28) and switch to the first signal that described hoist brake (22) is communicated with braking oil-feed oil circuit (X); And the hoist signal output that finishes is controlled described directional control valve (26) and is switched to described hoist brake (22) and the secondary signal of braking draining oil circuit (L) and being communicated with according to weight.
2. elevator braking control system as claimed in claim 1, is characterized in that, fall mouthful (B) of described hoist motor (21) is provided with reducing valve (24) to the oil circuit of described hoist brake (22).
3. elevator braking control system as claimed in claim 2, is characterized in that, the outlet of described reducing valve (24) separates a branch road that is communicated with braking draining oil circuit (L), is provided with check valve (25) and damping (27) on described branch road.
4. elevator braking control system as claimed in claim 3, it is characterized in that, also comprise shuttle valve (23), two oil inlet is communicated with the outlet of the actuator port of described directional control valve (26), described reducing valve (24) respectively, and its oil outlet is communicated with described hoist brake (22).
5. elevator braking control system as claimed in claim 4, is characterized in that, described directional control valve (26) is electromagnetic valve.
6. elevator braking control system as claimed in claim 1, is characterized in that, described hoist brake (22) is normally closed brake.
7. a hoisting crane, comprises hoist brake and the control system of controlling hoist brake work, it is characterized in that, the control system of described control hoist brake work is the elevator braking control system described in claim 1 to 6 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111955.XU CN203767921U (en) | 2014-03-12 | 2014-03-12 | Crane and winch brake control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111955.XU CN203767921U (en) | 2014-03-12 | 2014-03-12 | Crane and winch brake control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203767921U true CN203767921U (en) | 2014-08-13 |
Family
ID=51285135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420111955.XU Withdrawn - After Issue CN203767921U (en) | 2014-03-12 | 2014-03-12 | Crane and winch brake control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203767921U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803443A (en) * | 2014-03-12 | 2014-05-21 | 徐州重型机械有限公司 | Crane and hoist braking control system thereof |
-
2014
- 2014-03-12 CN CN201420111955.XU patent/CN203767921U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803443A (en) * | 2014-03-12 | 2014-05-21 | 徐州重型机械有限公司 | Crane and hoist braking control system thereof |
| CN103803443B (en) * | 2014-03-12 | 2016-06-29 | 徐州重型机械有限公司 | Crane and elevator braking control system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140813 Effective date of abandoning: 20160629 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140813 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |