Equipment chain falling detection device

Abstract

The utility model discloses an equipment chain falling detection device which comprises a planetary gear set, a miniature power generation motor, a relay circuit board and a relay. The planetary gear set is connected with a driven shaft of equipment through a first input shaft, the miniature power generation motor is connected with the planetary gear set through a second input shaft, the relay circuit board is connected with the miniature power generation motor and the relay, and the relay is connected to the control system. Power generated by rotation of equipment is transmitted to the miniature power generation motor through the planetary gear set, the miniature power generation motor converts mechanical energy into electric energy, and the relay circuit board provides power for the relay after rectifying, voltage stabilizing and filtering the electric energy, so that the relay acts and feeds back the power to a control system. The device has the characteristics of compact structure, convenience in operation, high detection accuracy, low cost and the like, and solves the problems that the conventional chain drop detection needs an external power supply and circuit support, the detection failure rate is high, the device is easily interfered by the external, the service life of the device is short and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment chain drop detection, and in particular relates to an equipment chain drop detection device. Background Art

[0002] Chain drop signal detection is one of the important tests to check whether the chain bucket and scraper are operating normally. In the prior art, proximity switches or time-delay proximity switches are mostly used to detect chain drop of equipment. This is mainly done by fixing a claw-shaped iron sheet on the rotating shaft at the non-driving end of the scraper or chain bucket, and detecting the rotation of the claw-shaped connecting sheet through a proximity switch or time-delay proximity switch to determine the rotation of the driven shaft, and then determine whether the equipment has chain dropped.

[0003] Since the detection requires the cooperation of an external power supply circuit, the reliability of the external circuit equipment also restricts the reliability of the detection. In addition, the detection process is relatively complicated, and the number of points prone to failure increases accordingly. At the same time, since it is separated from the device to be detected, and the device to be detected needs to extend an additional auxiliary detected end (or device), such as a claw-type rotating iron sheet, it is often affected by the environment and rusts or loses magnetism, resulting in erroneous signals. When the operating conditions of the device to be detected change, such as the change in speed caused by frequency conversion control, the detected signal range will also exceed the detection range of the detection device, so that the detection device cannot work normally or send out an erroneous signal. In addition, since the proximity switch or delayed proximity switch itself is an electronic product, its operation is easily affected by external interference and has a limited lifespan. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a device for detecting chain drop of equipment with compact structure, convenient operation, high detection accuracy and low cost, which solves the problems that the previous chain drop detection requires external power supply and circuit support, has a high detection failure rate, is susceptible to external interference, and has a short service life. To achieve the above purpose, the utility model can adopt the following technical solutions:

[0005] A device for detecting chain drop of equipment comprises: a planetary gear set, a micro generator motor, a relay circuit board and a relay; the planetary gear set is connected to the driven shaft of the equipment through a first input shaft, the micro generator motor is connected to the planetary gear set through a second input shaft, the relay circuit board is respectively connected to the micro generator motor and the relay, and the relay is connected to a control system; the power generated by the rotation of the equipment is transmitted to the micro generator motor through the planetary gear set, the micro generator motor converts the mechanical energy transmitted by the planetary gear set into electrical energy, and the relay circuit board provides power to the relay after rectifying, stabilizing and filtering the electrical energy emitted by the micro generator motor, so that the relay is actuated and thus fed back to the control system.

[0006] As a further improvement of the utility model, the planetary gear set, the micro generator motor, the relay circuit board and the relay are integrated in a housing made of metal or plastic.

[0007] As a further improvement of the utility model, the relay adopts a switch circuit composed of a coil relay or a solid-state relay or an electronic component.

[0008] As a further improvement of the present invention, the control system adopts a PLC control system or a DCS control system.

[0009] As a further improvement of the present invention, the first input shaft and the driven shaft of the device are connected by a coupling, a belt or a thread.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] The utility model discloses a chain-drop detection device for equipment, which is a purely mechanical device, by connecting a planetary gear set to a driven shaft of the equipment, connecting a micro-generator motor to a planetary gear set, connecting a relay circuit board to the micro-generator motor and a relay respectively, and then connecting the relay to a control system. The planetary gear set is synchronously connected to the equipment, the micro-generator motor converts the mechanical energy transmitted by the planetary gear set into electrical energy, the relay circuit board provides power to the relay after rectifying, stabilizing and filtering the electrical energy emitted by the micro-generator motor, so that the relay is actuated and thus fed back to the control system. The output signal of the chain-drop detection device for equipment is a passive dry contact, which does not require external power supply support and is not subject to electromagnetic interference. The fully enclosed structure has strong environmental adaptability and can adapt to various complex environments, thereby solving the problems of the need for external power supply and circuit support for chain-drop detection, high detection failure rate, susceptibility to external interference, and short device service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the explosion structure principle of the equipment chain drop detection device in a specific embodiment of the utility model;

[0013] Legend: 1. First input shaft; 2. Planetary gear set; 3. Second input shaft; 4. Micro generator motor; 5. Relay circuit board. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0015] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0016] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0017] Example

[0018] like Figure 1 As shown, the device for detecting chain drop of the equipment of the utility model comprises: a planetary gear set 2, a micro generator motor 4, a relay circuit board 5 and a relay (not shown in the figure). The planetary gear set 2 is connected to the driven shaft of the equipment through the first input shaft 1, the micro generator motor 4 is connected to the planetary gear set 2 through the second input shaft 3, the relay circuit board 5 is respectively connected to the micro generator motor 4 and the relay, and the relay is connected to the control system; the power generated by the rotation of the equipment is transmitted to the micro generator motor 4 through the planetary gear set 2, and the micro generator motor 4 converts the mechanical energy transmitted by the planetary gear set 2 into electrical energy. The relay circuit board 5 provides power to the relay after the electrical energy emitted by the micro generator motor 4 is rectified, stabilized and filtered, so that the relay is activated, and then fed back to the control system. The control system determines whether the equipment is chain dropped according to the action signal fed back by the relay. In other embodiments, gears of other structural forms can also be used for transmission.

[0019] In this embodiment, the gear stage number of the planetary gear set 2 can be selected according to the rotation speed of the on-site rotating equipment, that is, the transmission ratio N is selectable. The speed s of the micro generator motor 4 is N times the speed S of the first input shaft 1, that is, s=SN, where N is the transmission ratio.

[0020] In this embodiment, the first input shaft 1 is connected to the driven shaft of the device by a coupling. In other embodiments, the first input shaft 1 can also be connected to the driven shaft of the device by a belt or thread. The connection form is diverse and not restricted. It can be selected according to the site conditions as long as the kinetic energy can be transmitted stably.

[0021] In this embodiment, the relay uses a switch circuit composed of electronic components such as a coil relay or a solid-state relay or various switch tubes, as long as the action signal can be accurately transmitted to the control system.

[0022] In this embodiment, the planetary gear set 2, the micro generator motor 4, the relay circuit board 5 and the relay are integrated in a housing made of metal or plastic to improve environmental adaptability. If necessary, it can also be made to have a certain explosion-proof, corrosion-proof, waterproof and dust-proof level to be used in places requiring special protection levels.

[0023] In this embodiment, the control system adopts a PLC control system or a DCS control system. The PLC control system or the DCS control system receives the switch signal of the relay to determine whether the driven shaft rotates, thereby determining whether the device is disconnected. When the device is disconnected, its driven shaft no longer rotates, and the micro-generator 4 cannot output electricity to provide power for the relay of the relay circuit board 5. At this time, the output contact of the relay stops outputting the switch signal, and the control system will consider that the device is disconnected.

[0024] In this embodiment, by connecting the planetary gear set 2 to the driven shaft of the equipment, connecting the micro generator motor 4 to the planetary gear set 2, and connecting the relay circuit board 5 to the micro generator motor 4 and the relay respectively, and then connecting the relay to the control system, a purely mechanical equipment chain drop detection device is formed. The planetary gear set 2 is synchronously connected to the equipment, and the micro generator motor 4 converts the mechanical energy transmitted by the planetary gear set 2 into electrical energy. The relay circuit board 5 provides power for the relay after rectifying, stabilizing and filtering the electrical energy emitted by the micro generator motor 4, so that the relay is activated and fed back to the control system. The output signal of the equipment chain drop detection device is a passive dry contact, which does not require external power support and is not affected by electromagnetic interference. The fully enclosed structure has strong environmental adaptability and can adapt to various complex environments. It solves the problems of previous chain drop detection requiring external power supply and circuit support, high detection failure rate, susceptibility to external interference and short device service life.

[0025] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the spirit and technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A device for detecting a dropped link, characterized in that: include: A planetary gear set (2), a micro generator motor (4), a relay circuit board (5) and a relay; the planetary gear set (2) is connected to a driven shaft of a device via a first input shaft (1), the micro generator motor (4) is connected to the planetary gear set (2) via a second input shaft (3), the relay circuit board (5) is respectively connected to the micro generator motor (4) and the relay, and the relay is connected to a control system; the power generated by the rotation of the device is transmitted to the micro generator motor (4) via the planetary gear set (2), the micro generator motor (4) converts the mechanical energy transmitted by the planetary gear set (2) into electrical energy, and the relay circuit board (5) provides power to the relay after rectifying, stabilizing and filtering the electrical energy generated by the micro generator motor (4), so that the relay is actuated and thus fed back to the control system.

2. The device for detecting a dropped link of equipment according to claim 1, characterized in that: The planetary gear set (2), the micro generator motor (4), the relay circuit board (5) and the relay are integrated in a housing made of metal or plastic.

3. The device for detecting a dropped link of equipment according to claim 1, characterized in that: The relay adopts a switch circuit composed of a coil relay or a solid-state relay or an electronic component.

4. The device for detecting a dropped link of equipment according to claim 1, characterized in that: The control system adopts a PLC control system or a DCS control system.

5. The device for detecting a dropped link of equipment according to claim 1, characterized in that: The first input shaft (1) is connected to the driven shaft of the device by a coupling, a belt or a thread.

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