Belt conveyor emergency control system and method

Abstract

The application discloses a belt conveyor emergency control system and method, and the system comprises a pull rope, a tension detection mechanism for detecting the tension of the pull rope, a braking circuit for braking the belt conveyor, and a controller for braking the belt conveyor according to the tension detection result of the tension detection mechanism. The circuit structure is used for braking the belt conveyor, and damage is not prone to occur.

Description

Technical Field

[0001] This application relates to the field of belt conveyor control technology, and in particular, to an emergency control system and method for belt conveyors. Background Technology

[0002] In case of emergencies such as belt scratches, hopper obstruction, sudden increase in material transport volume, or belt slippage during belt conveyor operation, the belt conveyor must be shut down immediately to stop its operation and protect personal and equipment safety.

[0003] Currently, the main method is to use a pull rope to drive a spring, which in turn presses a switch button to shut down the conveyor belt in an emergency. However, since the spring and switch button are mechanical mechanisms, they are prone to damage after prolonged use, making it impossible to shut down the conveyor belt in an emergency. Summary of the Invention

[0004] The embodiments of this application provide an emergency control system and method for belt conveyors, which brakes the belt conveyor through a circuit structure, making it less prone to damage.

[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0006] According to a first aspect of the embodiments of this application, an emergency control system for a belt conveyor is provided, comprising:

[0007] The pull rope is equipped with a tension testing mechanism for detecting the pull rope's tension.

[0008] Braking circuit, used to brake belt conveyors;

[0009] The controller, based on the tensile test results from the tensile testing mechanism, controls the braking circuit to brake the belt conveyor.

[0010] In some embodiments of this application, based on the foregoing scheme, the braking circuit includes:

[0011] The first braking circuit brakes the belt conveyor in response to a first signal sent by the controller.

[0012] The second braking circuit brakes the belt conveyor in response to a second signal sent by the controller, wherein the tension detection result corresponding to the second signal is greater than the tension detection result corresponding to the first signal.

[0013] In some embodiments of this application, based on the foregoing scheme, the first braking circuit includes:

[0014] The first relay, in response to the first signal, closes;

[0015] The second relay is closed in response to the closing signal of the first relay;

[0016] The third relay, in response to the closing signal of the second relay, connects the trip circuit of the belt conveyor.

[0017] In some embodiments of this application, based on the foregoing scheme, the coil of the first relay is connected to the controller, the moving contact of the first relay is connected to the coil of the second relay, and the moving contact of the second relay is connected to the coil of the third relay.

[0018] In some embodiments of this application, based on the foregoing scheme, the second braking circuit includes:

[0019] The fourth relay, in response to the second signal, closes;

[0020] The fifth relay, in response to the closing signal of the fourth relay, closes the fifth relay, and in response to the closing signal of the fifth relay, the third relay connects the trip circuit of the belt conveyor.

[0021] In some embodiments of this application, based on the foregoing scheme, the coil of the fourth relay is connected to the controller, the moving contact of the fourth relay is connected to the coil of the fifth relay, and the moving contact of the fifth relay is connected to the coil of the third relay.

[0022] In some embodiments of this application, based on the foregoing scheme, the following further methods are also included:

[0023] The brackets are used to install the pull ropes and are located on both sides of the conveyor belt in the direction of travel.

[0024] In some embodiments of this application, based on the foregoing solution, the stent includes:

[0025] There are two fixed rods, each with a fixed head, and the two ends of the pull rope are connected to a fixed head.

[0026] In some embodiments of this application, based on the foregoing scheme, the following further methods are also included:

[0027] The reset circuit resets the first braking circuit and the second braking circuit.

[0028] According to a second aspect of this application, an emergency control method for a belt conveyor is provided, comprising:

[0029] Pulling the rope triggers a tension testing mechanism to detect the rope's tension and sends the test results to the controller.

[0030] Based on the tension detection results, the controller controls the braking circuit to brake the belt conveyor.

[0031] In some embodiments of this application, based on the foregoing scheme, the controller controls the braking circuit to brake the belt conveyor according to the tension detection result, including:

[0032] In response to a first signal sent by the controller, the first braking circuit brakes the belt conveyor;

[0033] In response to a second signal sent by the controller, the second braking circuit brakes the belt conveyor.

[0034] In some embodiments of this application, based on the foregoing scheme, the first braking circuit braking the belt conveyor in response to a first signal sent by the controller includes:

[0035] In response to the first signal sent by the controller, the first relay is closed;

[0036] In response to the closing signal of the first relay, the second relay is closed;

[0037] In response to the closing signal of the second relay, the third relay is closed;

[0038] In response to the closing signal of the third relay, the trip circuit of the belt conveyor is closed to brake the belt conveyor.

[0039] In some embodiments of this application, based on the foregoing scheme, the second braking circuit brakes the belt conveyor in response to a second signal sent by the controller, including:

[0040] In response to the second signal sent by the controller, the fourth relay is closed;

[0041] In response to the closing signal of the fourth relay, the fifth relay is closed;

[0042] In response to the closing signal of the fifth relay, the third relay is closed;

[0043] In response to the closing signal of the third relay, the trip circuit of the belt conveyor is closed to brake the belt conveyor.

[0044] The beneficial effects of this application are as follows:

[0045] Based on the tension of the pull rope, the controller brakes the belt conveyor through the braking circuit. Since the braking circuit is a circuit structure, it is not easily damaged even after long-term use, which allows the emergency braking of the belt conveyor to be completed smoothly.

[0046] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0048] Figure 1 A schematic diagram of an emergency control system for a belt conveyor according to an embodiment of this application is shown;

[0049] Figure 2 A flowchart of an emergency control method for a belt conveyor according to an embodiment of this application is shown. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0052] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0053] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0054] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0055] Figure 1 A schematic diagram of an emergency control system for a belt conveyor according to an embodiment of this application is shown. Figure 1 In the diagram, 1 is the support frame, 2 is the pull rope, 3 is the tension sensor, and 4 is the controller. (See attached diagram) Figure 1 This application provides an emergency control system for a belt conveyor, which includes at least a pull rope, a braking circuit, and a controller, as detailed below:

[0056] The pull rope is equipped with a tension testing mechanism for detecting the tension of the pull rope.

[0057] Specifically, the pull rope can be an elastic rope, such as a steel wire rope or a nylon rope, and the tension detection mechanism can be a tension sensor or a tension gauge.

[0058] Braking circuit, used to brake belt conveyors.

[0059] Specifically, the braking circuit can brake the belt conveyor by controlling its tripping circuit or by controlling its switching circuit.

[0060] The controller, based on the tensile test results from the tensile testing mechanism, controls the braking circuit to brake the belt conveyor.

[0061] Specifically, the controller can be a PLC controller or an industrial computer.

[0062] Optionally, the braking circuit includes:

[0063] The first braking circuit brakes the belt conveyor in response to a first signal sent by the controller.

[0064] The second braking circuit brakes the belt conveyor in response to a second signal sent by the controller, wherein the tension detection result corresponding to the second signal is greater than the tension detection result corresponding to the first signal.

[0065] Specifically, the controller sends a first signal to correspond to a slight pull on the pull rope, and a second signal to correspond to a strong pull on the pull rope. A slight pull on the pull rope corresponds to a minor belt conveyor malfunction, while a strong pull on the pull rope corresponds to a more serious belt conveyor malfunction.

[0066] Optionally, the first braking circuit includes:

[0067] The first relay, in response to the first signal, closes;

[0068] The second relay is closed in response to the closing signal of the first relay;

[0069] The third relay, in response to the closing signal of the second relay, connects the trip circuit of the belt conveyor.

[0070] Optionally, the coil of the first relay is connected to the controller, the moving contact of the first relay is connected to the coil of the second relay, and the moving contact of the second relay is connected to the coil of the third relay.

[0071] Specifically, the controller sends a first signal to the first relay, which can be an output current. After receiving the first signal, the coil of the first relay is turned on, and the first relay is closed. The current in the circuit where the first relay is located enters the coil of the second relay, and the second relay is closed. The current in the circuit where the second relay is located enters the coil of the third relay, and the third relay is closed.

[0072] Optionally, the second braking circuit includes:

[0073] The fourth relay, in response to the second signal, closes;

[0074] The fifth relay, in response to the closing signal of the fourth relay, closes the fifth relay, and in response to the closing signal of the fifth relay, the third relay connects the trip circuit of the belt conveyor.

[0075] Optionally, the coil of the fourth relay is connected to the controller, the moving contact of the fourth relay is connected to the coil of the fifth relay, and the moving contact of the fifth relay is connected to the coil of the third relay.

[0076] Specifically, the controller sends a second signal to the fourth relay. The second signal can be the output current. After the coil of the fourth relay receives the second signal, it turns on and closes. The current in the circuit where the fourth relay is located enters the coil of the fifth relay, and the fifth relay closes. The current in the circuit where the fifth relay is located enters the coil of the third relay, and the third relay closes.

[0077] Specifically, the first relay, the second relay, the third relay, the fourth relay, and the fifth relay can be normally open relays.

[0078] Optionally, it also includes:

[0079] The brackets are used to install the pull ropes and are located on both sides of the conveyor belt in the direction of travel.

[0080] Optionally, the support includes:

[0081] There are two fixed rods, each with a fixed head, and the two ends of the pull rope are connected to a fixed head.

[0082] Optionally, the pull rope consists of two sections, one end of which is connected to a tension detection mechanism and the other end of which is connected to a fixed rod.

[0083] For example, see Figure 1 The left end of the branch rope on the left is connected to the left-side fixing head, and the right end is connected to the tensile testing mechanism. The left end of the branch rope on the right is connected to the tensile testing mechanism, and the right end is connected to the right-side fixing head.

[0084] Specifically, the tension can be detected by pulling either the left or right branch rope. The operator can pull the rope from different positions. When the conveyor belt is long, it is convenient for the operator to brake the conveyor belt by pulling the branch rope.

[0085] Optionally, the pull rope is parallel to the direction of travel of the belt conveyor, for example, the pull rope is located on the side of the direction of travel of the belt conveyor, so that the operator can brake the belt conveyor by pulling the rope after observing an abnormal situation.

[0086] Optionally, it also includes:

[0087] The reset circuit resets the first braking circuit and the second braking circuit.

[0088] Specifically, the reset circuit can be a circuit used in the prior art for resetting relays to reset the relay.

[0089] For example, the reset circuit includes a reset button for each relay and a master button that controls the reset buttons. Pressing the master button resets the relays via the reset buttons.

[0090] Optionally, the circuits containing the second and fourth relays are equipped with indicator lights. When the circuit containing the second or fourth relay is connected, the indicator light will illuminate. After resolving the problem with the belt conveyor, the operator can start the belt conveyor by resetting the corresponding relay according to the indicator light.

[0091] Existing switches and buttons are all the same shape and located in the same position. Each belt conveyor includes multiple switches and buttons. When the operator pulls the rope to apply an emergency brake to the belt conveyor, after resolving the problem, other operators may find it difficult to identify which switch or button is in the off position. This application, however, uses indicator lights to enable operators to quickly locate the relay corresponding to the braked belt conveyor, so as to quickly restore the belt conveyor's power.

[0092] In the embodiments of this application, braking the belt conveyor can be understood as shutting down the belt conveyor.

[0093] Figure 2 A flowchart of an emergency control method for a belt conveyor according to an embodiment of this application is shown. See also: Figure 2 According to a second aspect of this application, an emergency control method for a belt conveyor is provided, comprising at least steps S1 and S2, detailed below:

[0094] In step S1, the pull rope is pulled, the tension detection mechanism detects the tension of the pull rope, and sends the tension detection result to the controller.

[0095] Specifically, pulling the rope can be done mechanically or manually.

[0096] In step S2, the controller controls the braking circuit to brake the belt conveyor based on the tension detection result.

[0097] Optionally, the controller controls the braking circuit to brake the belt conveyor based on the tension detection result, including:

[0098] In response to a first signal sent by the controller, the first braking circuit brakes the belt conveyor;

[0099] In response to a second signal sent by the controller, the second braking circuit brakes the belt conveyor.

[0100] Optionally, in response to a first signal sent by the controller, the first braking circuit brakes the belt conveyor, including:

[0101] In response to the first signal sent by the controller, the first relay is closed;

[0102] In response to the closing signal of the first relay, the second relay is closed;

[0103] In response to the closing signal of the second relay, the third relay is closed;

[0104] In response to the closing signal of the third relay, the trip circuit of the belt conveyor is closed to brake the belt conveyor.

[0105] Optionally, in response to a second signal sent by the controller, the second braking circuit brakes the belt conveyor, including:

[0106] In response to the second signal sent by the controller, the fourth relay is closed;

[0107] In response to the closing signal of the fourth relay, the fifth relay is closed;

[0108] In response to the closing signal of the fifth relay, the third relay is closed;

[0109] In response to the closing signal of the third relay, the trip circuit of the belt conveyor is closed to brake the belt conveyor.

[0110] In this embodiment, the controller brakes the belt conveyor via a relay based on the tension of the pull rope. On the one hand, since the relay is a circuit structure, it is not easily damaged after a long period of use, which enables the emergency braking of the belt conveyor to be completed smoothly. On the other hand, it has the advantages of fast response speed and stable performance.

[0111] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0112] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0113] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0114] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0115] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An emergency control system for a belt conveyor, characterized in that, include: The pull rope is equipped with a tension testing mechanism for detecting the pull rope's tension. Braking circuit, used to brake belt conveyors; The controller, based on the tensile test results from the tensile testing mechanism, controls the braking circuit to brake the belt conveyor. The braking circuit includes: The first braking circuit brakes the belt conveyor in response to a first signal sent by the controller. The second braking circuit brakes the belt conveyor in response to a second signal sent by the controller, wherein the tension detection result corresponding to the second signal is greater than the tension detection result corresponding to the first signal.

2. The belt conveyor emergency control system according to claim 1, characterized in that, The first braking circuit includes: The first relay, in response to the first signal, closes; The second relay is closed in response to the closing signal of the first relay; The third relay, in response to the closing signal of the second relay, connects the trip circuit of the belt conveyor.

3. The belt conveyor emergency control system according to claim 2, characterized in that, The coil of the first relay is connected to the controller, the moving contact of the first relay is connected to the coil of the second relay, and the moving contact of the second relay is connected to the coil of the third relay.

4. The belt conveyor emergency control system according to claim 2, characterized in that, The second braking circuit includes: The fourth relay, in response to the second signal, closes; The fifth relay, in response to the closing signal of the fourth relay, closes the fifth relay, and in response to the closing signal of the fifth relay, the third relay connects the trip circuit of the belt conveyor.

5. The belt conveyor emergency control system according to claim 4, characterized in that, The coil of the fourth relay is connected to the controller, the moving contact of the fourth relay is connected to the coil of the fifth relay, and the moving contact of the fifth relay is connected to the coil of the third relay.

6. The belt conveyor emergency control system according to claim 1, characterized in that, Also includes: The brackets are used to install the pull ropes and are located on both sides of the conveyor belt in the direction of travel.

7. The belt conveyor emergency control system according to claim 1, characterized in that, Also includes: The reset circuit resets the first braking circuit and the second braking circuit.

8. An emergency control method for a belt conveyor, characterized in that, include: Pulling the rope triggers a tension testing mechanism to detect the rope's tension and sends the test results to the controller. Based on the tension detection results, the controller controls the braking circuit to brake the belt conveyor. The controller, based on the tension detection results, controls the braking circuit to brake the belt conveyor, including: In response to a first signal sent by the controller, the first braking circuit brakes the belt conveyor; In response to a second signal sent by the controller, the second braking circuit brakes the belt conveyor. The tensile force detection result corresponding to the second signal is greater than the tensile force detection result corresponding to the first signal.

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