A safety protection system

Abstract

The present invention relates to a safety protection system, comprising a remote controller installed on a safety protection device, and an interlocking control circuit electrically connected to a conveying device; the interlocking control circuit comprises an AC contactor KM1, a stop button SB1, a start button SB2, and a wireless signal receiver matched with the remote controller; the start point of the transmitting module in the remote controller is electrically connected to the locking device of the safety protection device; the conveying device comprises a conveying motor M1, the three-phase input end of the conveying motor M1 is electrically connected to the three phases of the three-phase alternating current through the main contact of the AC contactor KM1, and a normally open two-way linkage switch SB3 is provided in the wireless signal receiver. The present invention interlocks the safety protection device and the conveying device, and the conveying device can only be started after the operator correctly uses the safety protection device, and the safety protection device is disabled when the operation is completed or there is an unexpected situation, and the conveying device immediately stops operating, so that the personal safety of the operator can be effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of safety protection, and in particular to a safety protection system. Background Art

[0002] During the loading process of products in bags or boxes, production enterprises use conveying equipment (such as conveyors and elevators) and one or more loaders stack the goods on the carriages for loading. According to the national standard GB / T3608-2008 "Classification of High-altitude Operations", "all operations that may cause a fall from a height of 2m or more (including 2m) above the reference plane are called high-altitude operations" and require the wearing of safety protection equipment. However, due to frequent vehicle changes and large loading and unloading tasks, the existing simple fall arresters are difficult to supervise, or the supervision cost is very high, and there is a risk of loading personnel being injured by starting the conveying equipment to transport goods before they are fully prepared. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a safety protection system which can effectively ensure the personal safety of operators.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a safety protection system, which is used to perform safety interlocking control on a conveying equipment equipped with a safety protection device; the safety protection system includes a remote controller installed on the safety protection device, and an interlocking control circuit electrically connected to the conveying equipment; the interlocking control circuit includes an AC contactor KM1, a stop button SB1, a start button SB2 and a wireless signal receiver matched with the remote controller, and a normally open two-way linkage switch SB3 is provided in the wireless signal receiver; a starting point of a transmitting module in the remote controller is electrically connected to a locking device of the safety protection device, and a safety confirmation button associated with the two-way linkage switch SB3 is provided on the remote controller; the conveying equipment includes a conveying motor M1, and the three-phase input end of the conveying motor M1 is connected to the AC contactor KM1 through the three-phase input end of the conveying motor M1. The main contacts of 1 are electrically connected to the three phases of the three-phase alternating current correspondingly, and the two-way linkage switch SB3 includes a first connection point of the first way, a second connection point of the first way, a first connection point of the second way and a second connection point of the second way. The first connection point of the first way is electrically connected to the X phase of the three-phase alternating current, the first second connection point of the first way is electrically connected to one end of the coil of the AC contactor KM1, the first second connection point is also electrically connected to the X phase through the first indicator light D1, the second first connection point of the second way is electrically connected to the neutral line, and the second second connection point of the second way is electrically connected to the X phase through the second indicator light D2; the other end of the coil of the AC contactor KM1 is electrically connected to the X phase through the start button SB2 and the stop button SB1 connected in series; the two ends of the auxiliary contact of the AC contactor KM1 are respectively electrically connected to the two ends of the start button SB2.

[0005] The beneficial effect of the present invention is that the present invention interlocks the safety protection equipment and the conveying equipment. The conveying equipment can only be started after the operator correctly uses the safety protection equipment. When the operation is completed or an unexpected situation occurs, the safety protection equipment is disabled and the conveying equipment immediately stops operating. In this way, the personal safety of the operator can be effectively guaranteed, thereby playing a safety protection role.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, a first thermal protection device FR1 is provided between the three-phase input terminal of the conveying motor M1 and the main contact of the AC contactor KM1, and / or a second thermal protection device FR2 is also connected in series to the line connecting the start button SB2 and the stop button SB1 in series.

[0008] The beneficial effects of adopting the above further solution are: the first thermal protection device FR1 can protect the conveying motor M1 to prevent the conveying motor M1 from being burned out; the second thermal protection device FR2 can protect the circuit where the start button SB2 and the stop button SB1 are located.

[0009] Furthermore, the first indicator light D1 and the second indicator light D2 are indicator lights of different colors.

[0010] Furthermore, the first indicator light D1 is a green indicator light, and the second indicator light D2 is a red indicator light.

[0011] The beneficial effect of adopting the above further solution is that the working status of the safety protection equipment can be easily observed through indicator lights of different colors.

[0012] Furthermore, the X phase is the A phase, the B phase or the C phase in the three-phase alternating current.

[0013] Furthermore, the safety protection equipment is specifically a fall arrester, and the locking device of the safety protection equipment is specifically a seat belt buckle.

[0014] Furthermore, the seat belt buckle includes a seat belt insert and a seat belt buckle head, and the starting point of the transmitting module in the remote controller is electrically connected to the two ends of the normally open point of the seat belt buckle head.

[0015] The beneficial effect of adopting the above further solution is: when the operator on the vehicle puts on the safety belt, when the normally open point of the safety belt buckle is closed, the starting point of the transmitting module in the remote control is connected and energized.

[0016] Furthermore, the conveying device also includes a lifting motor M2 for lifting the conveying device, the interlocking control circuit also includes AC contactors KM2 and KM3, the wireless signal receiver is also provided with a switch SB4 and a switch SB5, and the remote controller is also provided with a lifting button associated with the switch SB4 and the switch SB5; the three-phase input end of the lifting motor M2 is electrically connected to the three phases of the three-phase AC power through the main contacts of the AC contactor KM2, and the three-phase input end of the lifting motor M2 is also electrically connected to the three-phase AC power through the main contacts of the AC contactor KM3. three phases of current; one end of the switch SB4 is electrically connected to the X phase, and the other end of the switch SB4 is electrically connected to one end of the coil of the AC contactor KM2 through the auxiliary contact of the AC contactor KM2; one end of the switch SB5 is electrically connected to the X phase, and the other end of the switch SB5 is electrically connected to one end of the coil of the AC contactor KM3 through the auxiliary contact of the AC contactor KM3, and the other end of the coil of the AC contactor KM2 and the other end of the coil of the AC contactor KM3 are both electrically connected to the neutral line through the third indicator light D3.

[0017] Furthermore, the third indicator light D3 is a yellow indicator light.

[0018] The beneficial effect of adopting the above further scheme is that the lifting and lowering of the conveyor can be controlled by the invisible button on the remote control. When the invisible button (lifting and lowering button) is pressed, the remote control transmits a signal to close the switch SB4 or the switch SB5, the third indicator light D3 lights up, and the AC contactors KM2 and KM3 control the forward and reverse rotation of the lifting motor M2 to realize the lifting or lowering of the conveyor.

[0019] Furthermore, a third thermal protection device FR3 is provided between the switch SB4 and the auxiliary contact of the AC contactor KM2, or / and, a third thermal protection device FR3 is provided between the switch SB5 and the auxiliary contact of the AC contactor KM3, or / and, a fifth thermal protection device FR5 is provided between the three-phase input end of the lifting motor M2 and the main contact of the AC contactor KM2, or / and, a sixth thermal protection device FR6 is provided between the three-phase input end of the lifting motor M2 and the main contact of the AC contactor KM3. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a circuit structure schematic diagram of a safety protection system. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] like Figure 1As shown, a safety protection system is used for performing safety interlocking control on a conveying device equipped with a safety protection device; the safety protection system includes a remote controller installed on the safety protection device, and an interlocking control circuit electrically connected to the conveying device; the interlocking control circuit includes an AC contactor KM1, a stop button SB1, a start button SB2 and a wireless signal receiver matched with the remote controller, wherein a normally open two-way linkage switch SB3 is arranged in the wireless signal receiver; a starting point of a transmitting module in the remote controller is electrically connected to a locking device of the safety protection device, and a safety confirmation button for associating with the two-way linkage switch SB3 is arranged on the remote controller; the conveying device includes a conveying motor M1, and a three-phase input terminal of the conveying motor M1 corresponds to an electric Connected to the three phases of three-phase alternating current, the dual-way linkage switch SB3 includes a first-way first connection point, a first-way second connection point, a second-way first connection point and a second-way second connection point. The first-way first connection point is electrically connected to the X phase of the three-phase alternating current, the first-way second connection point is electrically connected to one end of the coil of the AC contactor KM1, the first-way second connection point is also electrically connected to the X phase through the first indicator light D1, the second-way first connection point is electrically connected to the neutral line, and the second-way second connection point is electrically connected to the X phase through the second indicator light D2; the other end of the coil of the AC contactor KM1 is electrically connected to the X phase through the start button SB2 and the stop button SB1 connected in series; the two ends of the auxiliary contact of the AC contactor KM1 are respectively electrically connected to the two ends of the start button SB2.

[0023] In this specific embodiment:

[0024] A first thermal protection device FR1 is provided between the three-phase input end of the conveying motor M1 and the main contact of the AC contactor KM1, and / or a second thermal protection device FR2 is also connected in series to the line connecting the start button SB2 and the stop button SB1 in series.

[0025] The first indicator light D1 and the second indicator light D2 are indicator lights of different colors. Preferably, the first indicator light D1 is a green indicator light, and the second indicator light D2 is a red indicator light.

[0026] The X phase is the A phase, the B phase, or the C phase in the three-phase alternating current.

[0027] The safety protection equipment is specifically a fall arrester, and the locking device of the safety protection equipment is specifically a seat belt buckle.

[0028] In the present invention, the conveying equipment also includes a lifting motor M2 for lifting the conveying equipment, the interlocking control circuit also includes AC contactors KM2 and KM3, the wireless signal receiver is also provided with a switch SB4 and a switch SB5, and the remote controller is also provided with a lifting button associated with the switch SB4 and the switch SB5; the three-phase input end of the lifting motor M2 is electrically connected to the three phases of the three-phase alternating current through the main contacts of the AC contactor KM2, and the three-phase input end of the lifting motor M2 is also electrically connected to the three phases through the main contacts of the AC contactor KM3. On the three phases of alternating current; one end of the switch SB4 is electrically connected to the X phase, and the other end of the switch SB4 is electrically connected to one end of the coil of the AC contactor KM2 through the auxiliary contact of the AC contactor KM2; one end of the switch SB5 is electrically connected to the X phase, and the other end of the switch SB5 is electrically connected to one end of the coil of the AC contactor KM3 through the auxiliary contact of the AC contactor KM3, and the other end of the coil of the AC contactor KM2 and the other end of the coil of the AC contactor KM3 are both electrically connected to the neutral line through the third indicator light D3.

[0029] The third indicator light D3 is a yellow indicator light.

[0030] A third thermal protection device FR3 is provided between the switch SB4 and the auxiliary contact of the AC contactor KM2, or / and, a third thermal protection device FR3 is provided between the switch SB5 and the auxiliary contact of the AC contactor KM3, or / and, a fifth thermal protection device FR5 is provided between the three-phase input end of the lifting motor M2 and the main contact of the AC contactor KM2, or / and, a sixth thermal protection device FR6 is provided between the three-phase input end of the lifting motor M2 and the main contact of the AC contactor KM3.

[0031] In the present invention, the remote controller and the wireless signal receiver are selected in appropriate models according to the needs.

[0032] The thermal protection device in the present invention can protect various components to work safely and avoid being burned.

[0033] The remote controller of the present invention has a built-in 12V battery.

[0034] The working principle of the present invention is explained below by taking the safety protection equipment as a fall arrester: after the operator on the vehicle wears the safety belt, when the normally open point of the safety belt buckle is closed, the starting point of the transmitting module in the remote controller is connected and energized, and after the preparation is completed, the operator on the vehicle presses the safety confirmation button, then the remote controller is powered on to transmit a signal, triggering the two-way linkage switch SB3 in the wireless signal receiver to act, the first indicator light D1 lights up and the second indicator light D2 goes out, prompting the operator off the vehicle to start the transmission motor M1, and at the same time the coil of the AC contactor KM1 is connected to the neutral line end and is turned on; when the operator off the vehicle can press the start button SB2, the coil of the AC contactor KM1 is connected to the live line end and is turned on the live line, the coil of the AC contactor KM1 is energized, and the AC The main contact of the AC contactor KM1 is energized, the AC contactor KM1 is self-locked successfully, and the conveying motor M1 is started. When the operator under the vehicle presses the stop button SB1, the live wire end of the coil of the AC contactor KM1 is disconnected from the live wire, the coil of the AC contactor KM1 loses power, the main contact of the AC contactor KM1 will not be energized, the AC contactor KM1 is released from self-locking, and the conveying motor M1 stops rotating; if the second indicator light D2 is on, the neutral wire end of the coil of the AC contactor KM1 is disconnected from the neutral wire, the coil of the AC contactor KM1 loses power, the AC contactor KM1 is released from self-locking, and at this time, even if the operator under the vehicle presses the start button SB2, the main contact of the AC contactor KM1 will not be energized, and the operator under the vehicle cannot start the conveying motor M1.

[0035] In addition, the lifting and lowering of the conveyor can be controlled by the lifting and lowering button on the remote control. When the operator on the vehicle presses the lifting and lowering button, the remote control transmits a signal to close the switch SB4 or the switch SB5, and the coil of the AC contactor KM2 or the AC contactor KM3 is energized, and the third indicator light D3 lights up. After the coil of the AC contactor KM2 or the AC contactor KM3 is energized, the main contacts of the AC contactor KM2 or the AC contactor KM3 are energized, and the lifting motor M2 rotates forward or reverse to realize the lifting or lowering of the conveyor.

[0036] The present invention interlocks the safety protection equipment and the conveying equipment. Only after the on-board operator correctly uses the safety protection equipment can the off-board operator start the conveying equipment. When the operation is completed or an unexpected situation occurs, the safety protection equipment is disabled and the conveying equipment immediately stops operating. In this way, the personal safety of the operator can be effectively guaranteed, thereby playing a safety protection role.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety protection system, characterized in that: The safety protection system is used for performing safety interlocking control on the conveying equipment equipped with the safety protection equipment; the safety protection system comprises a remote controller installed on the safety protection equipment, and an interlocking control circuit electrically connected to the conveying equipment; the interlocking control circuit comprises an AC contactor KM1, a stop button SB1, a start button SB2 and a wireless signal receiver matched with the remote controller, the wireless signal receiver is provided with a normally open two-way linkage switch SB3; the starting point of the transmitting module in the remote controller is electrically connected to the locking device of the safety protection equipment, and the remote controller is provided with a safety confirmation button associated with the two-way linkage switch SB3; the conveying equipment comprises a conveying motor M1, the three-phase input end of the conveying motor M1 is electrically connected to the three-phase AC contactor through the main contacts of the AC contactor KM1 On the three phases of the alternating current, the two-way linkage switch SB3 includes a first-way first connection point, a first-way second connection point, a second-way first connection point and a second-way second connection point, the first-way first connection point is electrically connected to the X phase of the three-phase alternating current, the first-way second connection point is electrically connected to one end of the coil of the AC contactor KM1, the first-way second connection point is also electrically connected to the X phase through the first indicator light D1, the second-way first connection point is electrically connected to the neutral line, and the second-way second connection point is electrically connected to the X phase through the second indicator light D2; the other end of the coil of the AC contactor KM1 is electrically connected to the X phase through the serially connected start button SB2 and the stop button SB1; the two ends of the auxiliary contact of the AC contactor KM1 are respectively electrically connected to the two ends of the start button SB2; A first thermal protection device FR1 is provided between the three-phase input end of the conveying motor M1 and the main contact of the AC contactor KM1, or / and a second thermal protection device FR2 is also connected in series to the line connecting the start button SB2 and the stop button SB1 in series; The first indicator light D1 and the second indicator light D2 are indicator lights of different colors.

2. The safety protection system according to claim 1, characterized in that: The first indicator light D1 is a green indicator light, and the second indicator light D2 is a red indicator light.

3. The safety protection system according to claim 1, characterized in that: The X phase is the A phase, the B phase, or the C phase in the three-phase alternating current.

4. The safety protection system according to any one of claims 1 to 3, characterized in that: The safety protection equipment is specifically a fall arrester, and the locking device of the safety protection equipment is specifically a seat belt buckle.

5. The safety protection system according to claim 4, characterized in that: The seat belt buckle comprises a seat belt insert and a seat belt buckle head, and the starting point of the transmitting module in the remote controller is electrically connected to the two ends of the normally open point of the seat belt buckle head.

6. The safety protection system according to any one of claims 1 to 3, characterized in that: The conveying device also includes a lifting motor M2 for lifting the conveying device, the interlocking control circuit also includes AC contactors KM2 and KM3, the wireless signal receiver is also provided with a switch SB4 and a switch SB5, and the remote controller is also provided with a lifting button associated with the switch SB4 and the switch SB5; the three-phase input end of the lifting motor M2 is electrically connected to the three phases of the three-phase alternating current through the main contacts of the AC contactor KM2, and the three-phase input end of the lifting motor M2 is also electrically connected to the three-phase alternating current through the main contacts of the AC contactor KM3. three phases; one end of the switch SB4 is electrically connected to the X phase, and the other end of the switch SB4 is electrically connected to one end of the coil of the AC contactor KM2 through the auxiliary contact of the AC contactor KM2; one end of the switch SB5 is electrically connected to the X phase, and the other end of the switch SB5 is electrically connected to one end of the coil of the AC contactor KM3 through the auxiliary contact of the AC contactor KM3, and the other end of the coil of the AC contactor KM2 and the other end of the coil of the AC contactor KM3 are both electrically connected to the neutral line through the third indicator light D3.

7. The safety protection system according to claim 6, characterized in that: The third indicator light D3 is a yellow indicator light.

8. The safety protection system according to claim 6, characterized in that: A third thermal protection device FR3 is provided between the switch SB4 and the auxiliary contact of the AC contactor KM2, or / and, a third thermal protection device FR3 is provided between the switch SB5 and the auxiliary contact of the AC contactor KM3, or / and, a fifth thermal protection device FR5 is provided between the three-phase input end of the lifting motor M2 and the main contact of the AC contactor KM2, or / and, a sixth thermal protection device FR6 is provided between the three-phase input end of the lifting motor M2 and the main contact of the AC contactor KM3.

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