Safety protection device and belt conveyor

Abstract

The utility model discloses a safety protection device and a belt conveyor. The safety protection device comprises a living body sensing unit, a first switch unit and a second switch unit. The living body sensing unit is arranged corresponding to an operation area of the belt conveyor and is used for detecting living bodies in the operation area; the first power supply end and the second power supply end of the living body sensing unit are respectively connected with an external power supply. The first switch unit is arranged between the first power supply end and an external power supply, and / or the first switch unit is connected between the second power supply end and the external power supply, and the first switch unit is used for disconnecting a power-on loop between the living body sensing unit and the external power supply. The first end of the second switch unit is connected with the power supply end, the second end of the second switch unit is connected with the power end of the belt conveyor, and the control end of the second switch unit is connected with the signal output end of the living body sensing unit. When the living body sensing unit detects a living body, the signal output end of the living body sensing unit outputs a control signal to control the second switch unit to be switched off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of belt conveyors, and in particular to a safety protection device and a belt conveyor. BACKGROUND

[0002] In the case that a person is working on the belt conveyor, the belt conveyor will be started to injure the human body and cause an accident. In the related art, an automatic device such as an infrared sensing device is used to sense the human body, and the start and stop of the belt conveyor are controlled according to the sensing result. However, the automatic sensing device is easily affected by moving materials, dust and light, etc., and misjudges that there is a human body in the working area, which causes the belt conveyor to be stopped urgently and reduces the working efficiency of the belt conveyor. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide a safety protection device and a belt conveyor, which can solve the problem of misjudgment of the automatic sensing device in the conventional belt conveyor technology and reduce the working efficiency of the belt conveyor.

[0004] In a first aspect, an embodiment of the present application provides a safety protection device applied to a belt conveyor, which comprises:

[0005] a living body sensing unit, which is arranged corresponding to a working area of the belt conveyor and is used to detect a living body in the working area; a first power supply end and a second power supply end of the living body sensing unit are connected with an external power supply respectively;

[0006] a first switch unit, which is arranged between the first power supply end and the external power supply, and / or is connected between the second power supply end and the external power supply, and is used to disconnect the power supply circuit between the living body sensing unit and the external power supply;

[0007] a second switch unit, a first end of the second switch unit is connected with a power supply end, a second end of the second switch unit is connected with a power supply end of the belt conveyor, the power supply end is used to supply power to the power supply end of the belt conveyor, and a control end of the second switch unit is connected with a signal output end of the living body sensing unit,

[0008] wherein when the living body sensing unit detects the living body, the signal output end of the living body sensing unit outputs a control signal to control the second switch unit to be disconnected.

[0009] According to some embodiments of the present application, the device further comprises:

[0010] a short-circuit protection unit, which is arranged between the first power supply end and the first switch unit, or is arranged between the first switch unit and the external power supply.

[0011] According to some embodiments of the present application, the short-circuit protection unit comprises:

[0012] An air switch is arranged between the first power supply end and the first switch unit, or arranged between the first switch unit and the external power supply.

[0013] According to some embodiments of the present application, the device further comprises:

[0014] A third switch unit is arranged between the power supply end and the first end of the second switch unit, or arranged between the second end of the second switch unit and the power supply end of the belt conveyor.

[0015] According to some embodiments of the present application, the third switch unit comprises:

[0016] A pull cord switch is arranged between the power supply end and the first end of the second switch unit, or arranged between the second end of the second switch unit and the power supply end of the belt conveyor.

[0017] According to some embodiments of the present application, the second switch unit comprises:

[0018] A relay, whose normally closed contact is connected to the power supply end, whose common end is connected to the power supply end of the belt conveyor, and whose control end is connected to the signal output end of the living body sensing unit.

[0019] According to some embodiments of the present application, the living body sensing unit comprises:

[0020] A microwave module, whose output end is connected to the control end of the second switch unit.

[0021] According to some embodiments of the present application, the device further comprises:

[0022] An alarm unit, whose control end is connected to the signal output end of the living body sensing unit.

[0023] According to some embodiments of the present application, the alarm unit comprises:

[0024] A buzzer, whose control end is connected to the signal output end of the living body sensing unit.

[0025] In a second aspect, the embodiments of the present application provide a belt conveyor, comprising the safety protection device as described above.

[0026] In the embodiment of the application, before the operation of the belt conveyor, the first switch unit is turned on, the power supply end supplies power to the living body sensing unit, the living body sensing unit detects the living body in the operation area of the belt conveyor, when the living body is detected, the living body sensing unit controls the second switch unit to be turned off, and the belt conveyor is powered off and cannot be started. If the living body sensing unit detects that there is no living body in the operation area of the belt conveyor, the living body sensing unit controls the second switch unit to be turned on, the power supply end supplies power to the belt conveyor, and the belt conveyor can be normally started. At this time, the first switch unit is turned off, the living body sensing unit is powered off, the operation of the belt conveyor is avoided in the case of misjudgment, and the working efficiency of the belt conveyor is improved.

[0027] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be further described below in conjunction with the drawings and embodiments, wherein:

[0029] Figure 1 The circuit diagram of the living body sensing unit in the embodiment of the safety protection device provided by the application;

[0030] Figure 2 The circuit diagram of the short-circuit protection unit in the embodiment of the safety protection device provided by the application;

[0031] Figure 3 The circuit diagram of the pull cord switch in the embodiment of the safety protection device provided by the application.

[0032] REFERENCE NUMERALS:

[0033] The living body sensing unit 100 and the short-circuit protection unit 200. DETAILED DESCRIPTION

[0034] The embodiments of the application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar numerals throughout the drawings denote the same or similar elements or elements having the same or similar functions. The embodiments described below by referring to the drawings are exemplary and are only used to explain the application, and cannot be understood as a limitation on the application.

[0035] In the description of the application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0036] In the description of the present application, more refers to more than two. If there is a description of the first, the second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0037] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installation, connection and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0038] The following refers to Figures 1 to 3 A safety protection device and a belt conveyor according to an embodiment of the present application are described.

[0039] An embodiment of the present application provides a safety protection device applied to a belt conveyor, as shown in the figure, the device comprises: Figure 1

[0040] The living body sensing unit 100 is arranged corresponding to the working area of the belt conveyor, and is used for detecting the living body in the working area. The first power supply end and the second power supply end of the living body sensing unit 100 are respectively connected with the external power supply.

[0041] The first switch unit K8 is arranged between the first power supply end and the external power supply, and / or the first switch unit K8 is arranged between the second power supply end and the external power supply. The first switch unit K8 is used to disconnect the power supply loop between the living body sensing unit 100 and the external power supply.

[0042] The second switch unit KA1 is connected with the power supply end at the first end, and is connected with the power supply end of the belt conveyor at the second end. The power supply end is used to supply power to the power supply end of the belt conveyor. The control end of the second switch unit KA1 is connected with the signal output end of the living body sensing unit 100,

[0043] Wherein, when the living body sensing unit 100 detects the living body, the signal output end of the living body sensing unit 100 outputs the control signal to control the second switch unit KA1 to disconnect.

[0044] ​In the embodiment of the present application, before the belt conveyor operates, the first switch unit K8 is turned on to supply power to the living body sensing unit 100 from the power supply end, the living body sensing unit 100 detects the living body in the operation area of the belt conveyor, and when the living body is detected, the living body sensing unit 100 controls the second switch unit KA1 to be turned off, so that the belt conveyor is powered off and cannot be started. If the living body sensing unit 100 detects that there is no living body in the operation area of the belt conveyor, the living body sensing unit 100 controls the second switch unit KA1 to be turned on, the power supply end supplies power to the belt conveyor, and the belt conveyor can normally start operation. At this time, the first switch unit K8 is turned off, and the living body sensing unit 100 is powered off, so as to avoid affecting the operation of the belt conveyor in the case of misjudgment, and improve the working efficiency of the belt conveyor.

[0045] In some embodiments of the present application, the living body sensing unit 100 can use an infrared sensing module, a video AI recognition device, etc. to automatically sense the living body in the operation area of the belt conveyor. In the case that there is a living body in the operation area, a control signal is output to control the second switch unit KA1 to be turned off, so that the belt conveyor is powered off and cannot be started to operate, thereby avoiding causing human injury accidents.

[0046] In some embodiments of the present application, the first switch unit K8 uses an electronic element that can open the circuit and interrupt the current. For example, the first switch unit K8 can use a switching device such as an electronic switch or a mechanical switch. If the first switch unit K8 uses an electronic switch, a closing signal or an opening signal is sent by the upper computer to control the conduction or disconnection of the electronic switch. If the first switch unit K8 uses a mechanical switch, the conduction or disconnection of the mechanical switch is controlled by manual operation.

[0047] In some embodiments of the present application, the first switch unit K8 can use one switching device, which is arranged between the first power supply end and the external power supply, or arranged between the second power supply end and the external power supply. Disconnecting the switching device can disconnect the power supply circuit between the living body sensing unit 100 and the external power supply. The first switch unit K8 can also use two switching devices, one switching device is arranged between the first power supply end and the external power supply, and the other switching device is arranged between the second power supply end and the external power supply. Disconnecting the two switching devices or disconnecting any one of the switching devices can disconnect the power supply circuit between the living body sensing unit 100 and the external power supply.

[0048] In some embodiments of the present application, the second switch unit KA1 can use a normally closed electronic switch. When the living body sensing unit 100 detects that there is a human body in the operation area of the belt conveyor, a control signal is output to control the electronic switch to be turned off.

[0049] In some embodiments of the present application, as shown in Figure 2 The device further includes:

[0050] The short-circuit protection unit 200 is arranged between the first power supply end and the external power supply. For example, the short-circuit protection unit 200 can be arranged between the external power supply and the first switch unit K8, or arranged between the first switch unit K8 and the first power supply end.

[0051] In this embodiment, the short-circuit protection unit 200 is used for short-circuit protection. When a large current is generated in the circuit, the short-circuit protection unit 200 is triggered to work, and short-circuit protection is performed to avoid damage to the living body sensing unit 100 and other devices.

[0052] In some embodiments of the present application, the short-circuit protection unit 200 can use a device with a short-circuit protection function, such as a fuse, a current limiting protector, etc. The fuse is fused to cut off the current when the current abnormally rises to a certain degree and for a certain time, thereby playing a role in protecting the safe operation of the circuit. When a short-circuit fault occurs in the circuit, the current limiting protector realizes rapid current limiting protection, reduces the heat accumulation caused by overcurrent, and eliminates the fault arc.

[0053] In some embodiments of the present application, as shown in Figure 2 The short-circuit protection unit 200 is arranged between the first power supply end and the external power supply. For example, the short-circuit protection unit 200 can be arranged between the external power supply and the first switch unit K8, or arranged between the first switch unit K8 and the first power supply end.

[0054] In this embodiment, the short-circuit protection unit 200 uses an air switch QF. When a large current flows through the air switch QF, the air switch QF is automatically disconnected, so that the line is disconnected, thereby protecting the living body sensing unit 100 and other devices.

[0055] In some embodiments of the present application, as shown in Figure 3 The device further comprises:

[0056] The third switch unit K is arranged between the power supply end and the power supply end of the belt conveyor. For example, the third switch unit K can be arranged between the first end of the second switch unit KA1 and the power supply end, and the third switch unit K can be arranged between the second end of the second switch unit KA1 and the power supply end of the belt conveyor.

[0057] In this embodiment, the third switch unit K can be a mechanical switch. When any emergency occurs in the operation area of the belt conveyor and the belt conveyor needs to be stopped, including but not limited to the presence of a human body in the operation area, the third switch unit K is manually operated to control the belt conveyor to stop working. For example, when the belt conveyor is normally operating, the living body sensing module is powered off and cannot automatically sense the human body in the operation area. If the staff manually monitors the presence of a human body in the operation area, the third switch unit K can be manually operated to be disconnected, and the belt conveyor is powered off and stopped. Before the belt conveyor normally operates, the operation area is manually monitored. If an emergency occurs, the third switch unit K is manually operated to be disconnected, so that the belt conveyor is powered off and cannot be started.

[0058] According to some embodiments of the present application, the third switch unit K includes:

[0059] A pull cord switch is arranged between the power supply end and the power supply end of the belt conveyor. For example, the pull cord switch can be arranged between the first end of the second switch unit KA1 and the power supply end. The pull cord switch can be arranged between the second end of the second switch unit KA1 and the power supply end of the belt conveyor.

[0060] In this embodiment, the pull cord switch is a commonly used safety switch device, mainly used for emergency stop of equipment or machines. Its working principle is to open or close the circuit by pulling the pull cord, thereby achieving emergency stop of the equipment. When any emergency occurs in the operation area of the belt conveyor and the belt conveyor needs to be stopped, the pull cord switch is pulled to stop the belt conveyor operation.

[0061] In some embodiments of the present application, as shown in Figure 3 The second switch unit KA1 includes:

[0062] A relay, the normally closed contact of the relay is connected to the power supply end, the common end of the relay is connected to the power supply end of the belt conveyor, and the control end of the relay is connected to the signal output end of the living body sensing unit 100.

[0063] In this embodiment, the second switch unit KA1 uses a relay. The relay is an electrical control device. When the input (excitation) changes to a specified requirement, the controlled quantity in the electrical output circuit changes by a predetermined step.

[0064] In this embodiment, the initial state of the normally closed contact and the common end of the relay is a mutual conduction state. When the living body sensing unit 100 detects a living body in the operation area of the belt conveyor, the signal output end of the living body sensing unit 100 outputs a control signal to the control end of the relay, i.e. the coil of the relay. The coil of the relay is powered on, thereby disconnecting the normally closed contact and the common end, so that the belt conveyor is powered off.

[0065] In some embodiments of the present application, the living body sensing unit 100 comprises:

[0066] a microwave module, an output end of the microwave module being connected to a control end of the second switch unit KA1.

[0067] In the present embodiment, the living body sensing unit 100 adopts a microwave module, which is an induction device based on microwave technology and mainly works in a specific radio frequency range. By transmitting and receiving high-frequency electromagnetic waves, the Doppler principle is applied to detect the frequency difference between the transmitted and received signals to determine whether there is a moving object in the region. It is not affected by environmental temperature, humidity, air flow, dust, noise, light brightness, etc. High-frequency electromagnetic waves can penetrate non-metallic materials such as glass and acrylic, and can be used to detect various scenes where human presence or moving target sensing is required.

[0068] In the present embodiment, the microwave module senses the living body in the operating area of the belt conveyor. The microwave module has a low misjudgment rate for living bodies and is not affected by moving materials, dust, and light, etc. If the microwave module senses that there is a living body in the operating area of the belt conveyor, the output end of the microwave module outputs a control signal to the control end of the second switch unit KA1, which controls the second switch unit KA1 to be disconnected, so that the belt conveyor is powered off.

[0069] In some embodiments of the present application, as shown in Figure 2 the microwave module is powered by mains electricity, the live wire end of the microwave module is connected to the live wire, and the neutral wire end of the microwave module is connected to the neutral wire. The output end of the microwave module is connected to the first end of the coil of the relay, and the second end of the coil of the relay is connected to the neutral wire.

[0070] In some embodiments of the present application, the device further comprises:

[0071] an alarm unit, a control end of the alarm unit being connected to a signal output end of the living body sensing unit 100.

[0072] In the present embodiment, when the living body sensing unit 100 detects that there is a living body in the operating area of the belt conveyor, the signal output end of the living body sensing unit 100 outputs a control signal to control the alarm unit to alarm and prompt the worker.

[0073] In some embodiments of the present application, the alarm unit can adopt an audible and visual alarm device. The audible and visual alarm is set to meet the special requirements for alarm loudness and installation position, and can simultaneously emit sound and light alarm signals.

[0074] In some embodiments of the present application, the alarm unit comprises:

[0075] a buzzer, a control end of the buzzer being connected to a signal output end of the living body sensing unit 100.

[0076] In the embodiment, the alarm unit adopts a buzzer, which is an integrated structure electronic sounder and is widely used in computer, printer, copier, alarm, electronic toy, automobile electronic equipment, telephone, timer and other electronic products as a sound device.

[0077] In the embodiment, when the living body sensing unit 100 detects that there is a living body in the operation area of the belt conveyor, the signal output end of the living body sensing unit 100 outputs a control signal to control the buzzer to alarm.

[0078] In some embodiments of the present application, the alarm unit can adopt any type of buzzer, for example, a piezoelectric buzzer or an electromagnetic buzzer.

[0079] In addition, the present application provides a belt conveyor comprising the safety protection device as described above.

[0080] The belt conveyor provided by the embodiments of the present application can realize the various processes realized by the safety protection device embodiments and achieve the same beneficial effects. To avoid repetition, details are not described here.

[0081] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the present application.

Claims

1. A safety guard comprising: The device is applied to a belt conveyor and comprises: a living body sensing unit arranged corresponding to a working area of the belt conveyor and used for detecting a living body in the working area; a first power supply end and a second power supply end of the living body sensing unit are respectively connected with an external power supply; a first switch unit arranged between the first power supply end and the external power supply and / or connected between the second power supply end and the external power supply, the first switch unit being used for disconnecting a power supply circuit between the living body sensing unit and the external power supply; a second switch unit, a first end of the second switch unit being connected with a power supply end, a second end of the second switch unit being connected with a power supply end of the belt conveyor, and a control end of the second switch unit being connected with a signal output end of the living body sensing unit, wherein when the living body sensing unit detects the living body, the signal output end of the living body sensing unit outputs a control signal to control the second switch unit to be disconnected.

2. The safety guard of claim 1, wherein The device further comprises: a short circuit protection unit arranged between the first power supply end and the first switch unit or arranged between the first switch unit and the external power supply.

3. The safety guard of claim 2, wherein, The short circuit protection unit comprises: an air switch arranged between the first power supply end and the first switch unit or arranged between the first switch unit and the external power supply.

4. The safety guard of claim 1, wherein, The device further comprises: a third switch unit arranged between the power supply end and the first end of the second switch unit or arranged between the second end of the second switch unit and the power supply end of the belt conveyor.

5. The safety guard of claim 4, wherein, The third switch unit comprises: a pull cord switch arranged between the power supply end and the first end of the second switch unit or arranged between the second end of the second switch unit and the power supply end of the belt conveyor.

6. The safety guard of claim 1, wherein The second switch unit comprises: a relay, a normally closed contact of the relay being connected with the power supply end, a common end of the relay being connected with the power supply end of the belt conveyor, and a control end of the relay being connected with the signal output end of the living body sensing unit.

7. The safety guard of claim 1, wherein, The living body sensing unit comprises: a microwave module, an output end of the microwave module being connected with the control end of the second switch unit.

8. The safety guard of claim 1, wherein, The device further comprises: an alarm unit, a control end of the alarm unit being connected with the signal output end of the living body sensing unit.

9. The safety guard of claim 8, wherein, The alarm unit comprises: a buzzer, a control end of the buzzer being connected with the signal output end of the living body sensing unit.

10. A belt conveyor, characterized in that The device comprises the safety protection device according to any one of claims 1 to 9.

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