CN108516358B - Spiral arm anti-falling device and spiral car unloader - Google Patents
Spiral arm anti-falling device and spiral car unloader Download PDFInfo
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- CN108516358B CN108516358B CN201810225327.7A CN201810225327A CN108516358B CN 108516358 B CN108516358 B CN 108516358B CN 201810225327 A CN201810225327 A CN 201810225327A CN 108516358 B CN108516358 B CN 108516358B
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- electromagnet
- spiral arm
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- spiral
- ratchet wheel
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- 230000007246 mechanism Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 12
- 239000003245 coal Substances 0.000 description 12
- 238000005299 abrasion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/02—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads
- B65G65/16—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads with rotary pick-up conveyors
- B65G65/22—Screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
- B65G67/24—Unloading land vehicles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to the field of screw car unloaders, and discloses a spiral arm anti-falling device and a screw car unloader, wherein the anti-falling device comprises: the ratchet wheel is connected with a rotating shaft of a motor for driving the spiral arm to move up and down; the electromagnet enables the ejector rod to move between a first position engaged with the ratchet wheel and a second position disengaged from the ratchet wheel through power failure or power on; and the control unit is used for controlling the electromagnet to be powered off or powered on. According to the spiral arm anti-falling device and the spiral car unloader with the same, the control unit controls the electromagnet to lose power or be electrified so that the ejector rod moves between the first position jointed with the ratchet wheel and the second position disengaged from the ratchet wheel, and when the ejector rod is jointed with the ratchet wheel, the rotation of the rotating shaft of the motor along the direction of descending the spiral arm can be limited, so that the probability of the spiral arm falling fault is effectively reduced, the damage to equipment and personnel is avoided, and the safety use performance of the device is obviously improved.
Description
Technical Field
The invention relates to the field of screw car unloaders, in particular to a screw arm anti-falling device and a screw car unloader with the same.
Background
The screw unloader can be divided into three types, namely a bridge type, a door type and a single-arm type according to the difference of the whole form. The bridge type spiral car unloader has the working principle that a spiral is used as a propeller, and when the spiral rotates in a coal pile of a carriage of a coal car, coal at the position contacted with the spiral is pushed out of the carriage of the coal car by the spiral. Besides the rotation of the screw, the screw arm frame can swing along the shaft, so that the screw is lifted or lowered. When the coal is unloaded, the valves at two sides of the wagon are opened, the unloading machine is driven to the position above the wagon, the coal can be unloaded into the coal unloading ditch from top to bottom by virtue of the lifting mechanism and the screw, and the coal of the wagon is basically unloaded by moving along the longitudinal direction of the wagon along with the unloading machine. And the screw thread of the screw of the unloader is bidirectional, so that coal can be unloaded from two sides. The spiral lifting mechanism of the spiral car unloader consists of a cantilever motor, a spiral motor, a band-type brake, a chain, a spiral large arm, a large arm track and the like, and the mechanical lifting part of the spiral lifting mechanism is called the spiral arm for short. When the coal unloading device works, the electromagnetic brake is opened, the cantilever motor rotates in the descending direction, the spiral arm slowly descends along the large arm track, and when the spiral arm descends to a certain position, the coal unloading operation is started. After the coal is unloaded, the cantilever motor rotates in the ascending direction, and the spiral arm resets.
In order to prevent the spiral arm from falling down, the existing spiral unloader only depends on the closing of the electromagnetic band-type brake of the lifting motor to prevent the spiral arm from falling down, specifically, when the band-type brake is powered off and is closed, the brake sheet can embrace the motor driving shaft to prevent the spiral arm from falling down, so that the abrasion of the band-type brake sheet is large, and when the abrasion of the band-type brake sheet is serious, if the adjustment is not in time, the spiral arm can automatically slide down, namely, the spiral arm falling down fault occurs, the damage to equipment and personnel can be caused, and the use safety performance of the device is low.
Therefore, there is a need to design a spiral arm fall arrest device that effectively prevents a spiral arm from falling.
Disclosure of Invention
The invention aims to overcome the problem that the spiral arm can drop in the prior art, and provides a spiral arm anti-falling device which can effectively prevent the spiral arm from dropping.
The invention also aims to provide a screw unloader comprising the screw arm anti-falling device.
In order to achieve the above object, an aspect of the present invention provides a spiral arm fall preventing device, including: the ratchet wheel is used for being connected with a rotating shaft of a motor for driving the spiral arm to move up and down; a plunger and an electromagnet that moves the plunger between a first position engaging the ratchet and a second position disengaging the ratchet by de-energizing or energizing; and the control unit is used for controlling the electromagnet to be powered off or powered on.
In the technical scheme, the control unit controls the electromagnet to be powered off or powered on so that the ejector rod moves between the first position engaged with the ratchet wheel and the second position disengaged from the ratchet wheel, and the rotation of the motor rotating shaft along the direction of descending the spiral arm can be limited when the ejector rod is engaged with the ratchet wheel, so that the probability of the falling fault of the spiral arm is effectively reduced, the damage to equipment and personnel is avoided, the safety use performance of the device is obviously improved, the cost is saved to a certain extent, and meanwhile, the improvement of the working efficiency is facilitated.
Preferably, the fall arrest device comprises a transmission mechanism disposed between the ram and the electromagnet.
Preferably, the transmission mechanism comprises a support and a connecting plate hinged to the support, the ejector rod is hinged to a first end of the connecting plate, the electromagnet is arranged at a second end of the connecting plate, and the connecting plate can swing around a hinge point on the support to drive the ejector rod to move between the first position and the second position when the electromagnet is powered off or powered on.
Preferably, the fall arrest device includes a return device between the connection plate and the electromagnet, the return device being arranged to enable the connection plate to swing in a direction to return the ram to the first position when the electromagnet is de-energised.
Preferably, the return means is a spring provided to be compressed when the link plate is swung in a direction to return the jack to the second position so as to be able to provide a biasing force when the link plate is swung in a direction to return the jack to the first position.
Preferably, the transmission mechanism comprises a pull rod hinged to the second end of the connecting plate, and when the electromagnet is powered off, the pull rod can be moved away from the electromagnet or when the electromagnet is powered on, the pull rod can be moved towards the electromagnet to drive the connecting plate to swing around the hinge point; the spring is sleeved outside the pull rod.
Preferably, the control unit is arranged to control the electromagnet to be de-energized or energized in dependence on the torque or rotational speed of the motor.
Preferably, the anti-falling device comprises a limit switch for detecting the position of the ejector rod, and the control unit is connected with the limit switch to judge the position of the ejector rod according to the opening and closing state of the limit switch.
The invention provides a screw unloader, which comprises a screw arm, a motor for driving the screw arm to move up and down and the screw arm anti-falling device, wherein the ratchet wheel of the anti-falling device is connected with the rotating shaft of the motor.
Preferably, the screw unloader comprises a gear installed on a rotating shaft of the motor and a rack matched with the gear and arranged on the screw arm.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is a schematic illustration in partial cross-sectional view of a spiral arm fall arrest device in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic view of another angle configuration of the spiral arm fall arrest device in accordance with the preferred embodiment of the present invention.
Description of the reference numerals
1 ratchet 2 push rod
3 electromagnet 4 connecting plate
5 spring 6 pull rod
7 limit switch 8 brake wheel
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right as viewed with reference to the accompanying drawings, unless otherwise specified; "inner and outer" refer to the inner and outer relative to the profile of the components themselves.
The invention provides a spiral arm anti-falling device which comprises a ratchet wheel 1, a mandril 2, an electromagnet 3 and a control unit, wherein the ratchet wheel 1 is connected with a rotating shaft of a motor for driving a spiral arm to move up and down; the electromagnet 3 enables the mandril 2 to move between a first position engaged with the ratchet wheel 1 and a second position disengaged from the ratchet wheel 1 by power failure or power on; the control unit is used for controlling the electromagnet 3 to be powered off or powered on. The electromagnet 3 may be an electromagnet or other electromagnetic system.
In the technical scheme, as shown in fig. 1 and 2, the electromagnet 3 is controlled by the control unit to be powered off or powered on so that the ejector rod 2 moves between a first position jointed with the ratchet 1 and a second position disengaged from the ratchet 1, and when the ejector rod 2 is jointed with the ratchet 1, the rotation of a rotating shaft of the motor along the direction of descending the spiral arm can be limited, so that the probability of the falling fault of the spiral arm is effectively reduced, the damage to equipment and personnel is avoided, the safety and usability of the device are obviously improved, the cost is saved to a certain extent, and meanwhile, the improvement of the working efficiency is facilitated.
Wherein the electromagnet 3 can directly influence the movement of the carrier rod 2 between the first position and the second position, it is preferred that the fall arrest device comprises a transmission mechanism arranged between the carrier rod 2 and the electromagnet 3 in order to reduce energy consumption. That is, the electromagnet 3 indirectly affects the movement of the jack 2 through the transmission mechanism.
And, the structure of the transmission mechanism can be selected in many ways, preferably, the transmission mechanism comprises a bracket and a connecting plate 4 hinged on the bracket, the push rod 2 is hinged with a first end of the connecting plate 4, the electromagnet 3 is arranged at a second end of the connecting plate 4 and can make the connecting plate 4 swing around a hinge point on the bracket by losing power or getting power so as to drive the push rod 2 to move between the first position and the second position. As shown in figure 1, the hinged position of the connecting plate 4 is arranged close to the first end of the mounting ejector rod 2, so that the second end of the connecting plate 4 is driven by small force to enable the connecting plate 4 to swing around a hinged point, the electric energy output to the electromagnet can be reduced, and the cost is reduced.
In order to ensure that the push rod 2 in the second position can be returned to the first position in time to limit the rotation of the ratchet 1, the fall-preventing device preferably comprises a resetting device between the connecting plate 4 and the electromagnet 3, the resetting device being arranged to enable the connecting plate 4 to swing in a direction to return the push rod 2 to the first position when the electromagnet 3 is de-energized.
Wherein the returning means is selected according to installation space and cost, and preferably, the returning means is a spring 5, and the spring 5 is configured to be compressed when the connecting plate 4 swings in the direction of returning the jack 2 to the second position so as to be able to provide a biasing force when the connecting plate 4 swings in the direction of returning the jack 2 to the first position.
In order to facilitate installation of the electromagnet 3, improve accuracy of the electromagnet 3 influencing swinging of the connecting plate 4 and facilitate installation of the spring 5 serving as a reset device, preferably, the transmission mechanism comprises a pull rod 6 hinged to the second end of the connecting plate 4, and when the electromagnet 3 is powered off, the pull rod 6 can be moved away from the electromagnet 3 or when the electromagnet 3 is powered on, the pull rod 6 can be moved towards the electromagnet 3 to drive the connecting plate 4 to swing around the hinged point; the spring 5 is sleeved outside the pull rod 6.
In addition, in order to ensure that the fall protection device does not affect the normal use of the motor and fall protection can be achieved, the control unit is preferably configured to control the electromagnet 3 to be de-energized or energized according to the torque or the rotating speed of the motor. Specifically, when the ejector rod 2 is located at a first position engaged with the ratchet wheel 1, after the motor receives a transmission instruction, the motor speed controller and the electromagnet of the anti-falling device are opened for delaying time, the motor torque is increased to the torque required by the release of the anti-falling contracting brake, the control unit enables the electromagnet 3 to be electrified, the ejector rod 2 moves from the first position to a second position disengaged from the ratchet wheel 1, namely, the ejector rod is retracted, the lifting stroke of the ejector rod 2 is greater than the tooth height of the ratchet wheel 1, the bidirectional unconstrained rotation of the ratchet wheel 1 can be ensured, and therefore the motor can normally rotate to work, and the safe operation of the spiral arm is realized. When the spiral arm lifting operation has a driving fault, the rotating speed of the motor is lower than the set rotating speed in the normal working process, the control unit enables the electromagnet 3 of the anti-falling device to lose power, the ejector rod 2 moves to the first position from the second position, and meanwhile, the electromagnetic band-type brake of the motor embraces the brake wheel to enable the spiral arm to stop stably, so that the spiral arm is prevented from falling down, the abrasion of a band-type brake pad is reduced, the safety control of the spiral arm motor is improved, and the safe and stable operation of equipment is ensured.
Preferably, the anti-falling device comprises a limit switch 7 for detecting the position of the ejector rod 2, and the control unit is connected with the limit switch 7 to judge the position of the ejector rod 2 according to the opening and closing state of the limit switch 7. For example, after the electromagnet 3 is powered on, the open-close state of the switch is changed when the plunger 2 moves from the first position to the second position, for example, the switch changes from the closed state to the open state or from the open state to the closed state, and similarly, after the electromagnet 3 is powered off, the open-close state of the switch is changed when the plunger 2 moves from the second position to the first position, for example, the switch changes from the open state to the closed state or from the closed state to the open state, and the control unit can know the position of the plunger 2 according to the change of the open-close state of the limit switch 7 so as to send a corresponding control instruction.
The invention provides a screw unloader, which comprises a screw arm, a motor for driving the screw arm to move up and down and the screw arm anti-falling device, wherein the ratchet wheel 1 of the anti-falling device is connected with a rotating shaft of the motor. When the brake wheel 8 is mounted on the end of the motor shaft, the ratchet 1 can be connected to the brake wheel 8. Since the screw unloader comprises the screw arm anti-falling device, all or at least part of the technical effects of the screw arm anti-falling device are achieved, and the details and effects of the more specific technical scheme can be referred to the above.
Preferably, the screw unloader comprises a gear mounted on a rotating shaft of the motor and a rack matched with the gear and arranged on the screw arm. Thus, the rotation of the motor can be converted into the up-and-down movement of the spiral arm. Of course, other configurations that convert rotation into up and down movement may be used.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (8)
1. A spiral arm fall arrest device, its characterized in that, fall arrest device includes:
the ratchet wheel (1) is connected with a rotating shaft of a motor for driving the spiral arm to move up and down;
a push rod (2) and an electromagnet (3), wherein the electromagnet (3) enables the push rod (2) to move between a first position engaged with the ratchet wheel (1) and a second position disengaged from the ratchet wheel (1) through power failure or power on;
the control unit is used for controlling the electromagnet (3) to be de-energized or energized, the control unit is arranged for controlling the electromagnet (3) to be de-energized or energized according to the torque or the rotating speed of the motor, the control unit is arranged for energizing the electromagnet (3) while the torque of the motor is increased to the torque required by brake release, the ejector rod (2) moves from the first position to the second position, the control unit is arranged for de-energizing the electromagnet (3) of the anti-falling device when the rotating speed of the motor is lower than the set rotating speed in normal work, and the ejector rod (2) moves from the second position to the first position;
the anti-falling device comprises a limit switch (7) used for detecting the position of the ejector rod (2), and the control unit is connected with the limit switch (7) to judge the position of the ejector rod (2) according to the opening and closing state of the limit switch (7).
2. Spiral arm fall arrest device according to claim 1, characterized in that it comprises a transmission mechanism arranged between the top rod (2) and the electromagnet (3).
3. The spiral arm anti-falling device according to claim 2, characterized in that the transmission mechanism comprises a bracket and a connecting plate (4) hinged on the bracket, the push rod (2) is hinged with a first end of the connecting plate (4), the electromagnet (3) is arranged at a second end of the connecting plate (4) and can make the connecting plate (4) swing around a hinge point on the bracket by losing power or getting power to drive the push rod (2) to move between the first position and the second position.
4. A spiral arm fall arrest device according to claim 3, characterized in that it comprises a reset device between the connection plate (4) and the electromagnet (3), which reset device is arranged to enable the connection plate (4) to swing in a direction to return the push rod (2) to the first position when the electromagnet (3) is de-energised.
5. A spiral arm fall arrest device according to claim 4, characterized in that the return means is a spring (5), the spring (5) being arranged to be compressed upon swinging of the connection plate (4) in a direction to return the ram (2) to the second position to be able to provide a biasing force upon swinging of the connection plate (4) in a direction to return the ram (2) to the first position.
6. A spiral arm fall arrest device according to claim 5, characterized in that the transmission mechanism comprises a pull rod (6) articulated to the second end of the connection plate (4), the electromagnet (3) being able to move the pull rod (6) away from the electromagnet (3) when de-energized or the electromagnet (3) being able to move the pull rod (6) towards the electromagnet (3) when energized to bring the connection plate (4) to swing around the articulation point; the spring (5) is sleeved outside the pull rod (6).
7. A screw unloader, characterized in that, the screw unloader includes spiral arm, drive the spiral arm motor that moves up and down and according to the spiral arm anti-falling device of any one of claims 1-6, the ratchet (1) of anti-falling device links to each other with the pivot of motor.
8. The screw unloader of claim 7, comprising a gear mounted on a shaft of the motor and a rack cooperating with the gear and disposed on the screw arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225327.7A CN108516358B (en) | 2018-03-19 | 2018-03-19 | Spiral arm anti-falling device and spiral car unloader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225327.7A CN108516358B (en) | 2018-03-19 | 2018-03-19 | Spiral arm anti-falling device and spiral car unloader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108516358A CN108516358A (en) | 2018-09-11 |
| CN108516358B true CN108516358B (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810225327.7A Active CN108516358B (en) | 2018-03-19 | 2018-03-19 | Spiral arm anti-falling device and spiral car unloader |
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| Country | Link |
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| CN (1) | CN108516358B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112093615A (en) * | 2020-09-17 | 2020-12-18 | 罗跃红 | Multistage speed limit anti-falling device of construction elevator |
| CN117713443B (en) * | 2023-12-26 | 2024-05-07 | 北京天创金农科技有限公司 | Intelligent electric transport vehicle lifting motor and lifting assembly thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE621571A (en) * | 1961-08-18 | |||
| CN2134381Y (en) * | 1992-01-06 | 1993-05-26 | 交通部秦皇岛港务局 | Spiral unloader |
| JP2562095B2 (en) * | 1992-05-12 | 1996-12-11 | 株式会社ト−ハク | Belt retractable sewing material conveyor |
| JPH06191783A (en) * | 1992-12-24 | 1994-07-12 | Hitachi Ltd | Escalator device |
| JP3018915B2 (en) * | 1994-08-26 | 2000-03-13 | 株式会社日立製作所 | Inclined passenger conveyor device |
| CN202866264U (en) * | 2012-09-25 | 2013-04-10 | 成都市永洪机械有限公司 | High-rise building integral lifting scaffold anti-falling device |
| CN203582046U (en) * | 2013-11-29 | 2014-05-07 | 哈尔滨和泰电力设备有限公司 | Safety hook device of spiral car unloader |
| CN204022239U (en) * | 2014-08-13 | 2014-12-17 | 波士顿电梯(苏州)有限公司 | A kind of step chains emergency braking apparatus of staircase |
| CN205953391U (en) * | 2016-05-03 | 2017-02-15 | 浙江铭友环境工程有限公司 | Hoist engine self -locking mechanism |
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| CN108516358A (en) | 2018-09-11 |
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