Normally closed switch jumper of mechanical equipment

Abstract

The utility model discloses a mechanical equipment normally-closed switch jumper, which comprises a circuit board, two signal connectors and two power connectors are arranged at the end of the circuit board, a power circuit is arranged on the circuit board, the power circuit is electrically connected with the power connectors, and a relay of a control circuit is connected with the signal connectors. The signal connector is connected with a wiring end of the normally-closed switch through a signal line, and the relay can control on-off of the signal line. According to the utility model, the jumper is arranged, and whether a signal line of the jumper is smooth or not can be controlled through a time control state and a Bluetooth control state, namely whether the normally-closed switch is bridged or not; when the Bluetooth signal generation source sends out a disconnection signal or the signal is lost or the set duration is exceeded, the signal line is disconnected, and the normally-closed switch is not bridged at the moment, so that safety accidents such as equipment damage and personnel injury caused by forgetting of the bridge are avoided, and great practical significance and application value are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of normally closed switch jumpers, in particular to a normally closed switch jumper for mechanical equipment. Background Art

[0002] In order to ensure the safety of mechanical equipment, normally closed switches are installed on mechanical equipment. Normally closed switches are protective switches to ensure the normal operation of the equipment. The state of the contacts corresponds to the working state of the equipment. When the equipment is normal, the switch contacts are generally in a closed state.

[0003] During the installation, commissioning, repair, maintenance and inspection of mechanical equipment, in order to verify whether the function of the mechanical equipment is normal, it is necessary to manually jumper the normally closed switch to perform verification or troubleshooting operations. Specifically, the operator uses a section of wire as a jumper wire of the normally closed switch, and through the connection of the jumper wire, the verification or troubleshooting of the mechanical equipment is realized.

[0004] However, after completing the verification or troubleshooting of mechanical equipment, the jumper wire is often forgotten in the circuit, causing the mechanical equipment's protective switch to remain in the jumper state, unable to play its due control role, and posing a greater safety hazard. For example, the gantry crane's limit switch will not be able to automatically stop at the operating limit after being jumpered, which can easily cause a derailment accident, resulting in equipment damage and personal injury. Utility Model Content

[0005] The utility model aims to provide a normally closed switch jumper for mechanical equipment, aiming to improve the problem that the jumper wire used for mechanical equipment verification or troubleshooting is left on the normally closed switch, posing a potential safety hazard.

[0006] The utility model is implemented as follows: a normally closed switch jumper for mechanical equipment includes a circuit board, two signal connectors and two power connectors are arranged at the end of the circuit board, and a power circuit is arranged on the circuit board, the power circuit is electrically connected to the power connector, and the relay of the control circuit is connected to the signal connector, the signal connector is connected to the wiring terminal of the normally closed switch through a signal line, and the relay can control the on and off of the signal line.

[0007] Preferably, the power connector is connected to the power supply of the mechanical equipment through a power cord, and the power supply is AC / DC 12V-260V; the working voltage output by the power circuit supplies the timing control circuit, Bluetooth circuit, control circuit and reminder circuit.

[0008] Preferably, a high-level power line may be connected to a signal line to output a high-level signal, or a low-level power line may be connected to a signal line to output a low-level signal.

[0009] Preferably, an intermittent buzzer is provided at the reminder circuit; the time control circuit is associated with the time display light and the time control button on the housing, and the time control state is entered by pressing the time control button.

[0010] Preferably, the time display light can light up corresponding to the countdown, and the intermittent buzzer can emit a sound reminder.

[0011] Preferably, the Bluetooth circuit of the mechanical equipment and the Bluetooth circuit of the jumper are connected to transmit data and enter the Bluetooth control state, in which the signal is turned on; turning off, connecting, and disconnecting Bluetooth can determine whether the control circuit works or not.

[0012] Preferably, the control of the time control state takes precedence over the Bluetooth control state.

[0013] Preferably, pressing the time control button once increases the time display light by one hour, with the maximum setting value being ten hours; pressing the time control button for the eleventh time can close the jumper.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model is provided with a jumper, and can control whether the signal line of the jumper is unobstructed, that is, whether the normally closed switch is jumpered, through the time control state and the Bluetooth control state; when the Bluetooth signal source sends a disconnect signal or the signal is lost, or exceeds the set time, the signal line is disconnected, and the normally closed switch is not jumpered at this time, thereby avoiding safety accidents such as equipment damage and personal injury caused by forgetting the jumper, and has great practical significance and application value.

[0016] 2. The jumper of the utility model is provided with a Bluetooth control mode, which greatly facilitates the operator to operate the equipment, avoids the risks caused by frequent high-altitude operations, and effectively improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the principle of the utility model;

[0019] Figure 3 It is a schematic diagram of the connection between the utility model and the use equipment;

[0020] Figure 4 It is a schematic diagram of the utility model and the equipment used.

[0021] In the figure: 1. Time display light; 2. Time control button; 3. Intermittent buzzer; 4. Power status light; 5. Power connector; 6. Signal connector. DETAILED DESCRIPTION

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0024] In order to avoid missing a jumper wire on a normally closed switch, the present embodiment provides a jumper that can be automatically started and broken, the jumper comprising a shell and a circuit board located in the shell, the circuit board being provided with a power supply circuit, a timing control circuit, a Bluetooth circuit, a control circuit, a reminder circuit, etc., the shell being provided with a time control button 2, a power status light 4, a time display light 1 and four wires, the time control button 2 and the time display light 1 being electrically connected to the timing control circuit, the power status light 4 being electrically connected to the power circuit, and two power connectors 5 being provided at the end of the power circuit, the two power connectors 5 being connected to various power sources between AC / DC 12V-260V through power lines, an intermittent buzzer 3 being provided on the reminder circuit, a relay being provided on the control circuit, and a signal connector 6 being provided at the end, the signal connector 6 being connected to the wiring terminal of the normally closed switch through a signal line.

[0025] Specifically, two signal lines are connected to the two terminals of the normally closed switch or the wires connecting the two terminals; two power lines (one connected to the high level and the other connected to the low level) are connected to the power supply of the mechanical equipment, outputting the power supply of the working voltage, and supplying the internal time control circuit, Bluetooth circuit, control circuit, and reminder circuit at the same time. That is, the power supply of the mechanical equipment itself is converted into the working power supply through the internal power supply circuit for operation. The internal power supply circuit of the jumper is rectified and stepped down to the working power supply, and the power is supplied to other circuits for operation. The two signal lines are turned on by the relay trigger of the control circuit. Then they are connected to the two terminals of the normally closed switch or the wires connecting the two terminals to form a jumper for the normally closed switch (circuit) of the mechanical equipment. After the given conditions are lost, the relay contacts of the control circuit are disconnected, making the jumper function invalid.

[0026] In addition, any one of the two signal lines can be connected in parallel with one of the two power lines to meet the power characteristics of the normally closed switch (circuit). If the device input signal is high-level valid, a high-level line of a power line can be connected to a signal line to output a high-level signal; if it is low-level valid, a low-level line of a power line can be connected to a signal line to output a low-level signal.

[0027] The jumper is characterized in that after the power supply of the mechanical equipment is connected, it enters the test state. The control circuit and the reminder circuit work immediately. The two signal lines are connected after the relay of the control circuit is triggered. The buzzer will emit an intermittent reminder. Let the user know that operations such as troubleshooting or function verification can be performed. If no external signal is applied, the test time is 30 minutes. After the time is reached, the control circuit stops working, the two signal lines are in a disconnected state, and the jumper fails. At this time, the buzzer is silent, and all the time display lights 1 flash. If the power is disconnected again later, it will enter the test state again when the power is connected again.

[0028] Within 30 minutes after the mechanical equipment enters the test state, the time control circuit can be started by pressing the time control button on the shell, and the time control state will be entered immediately. The time display light 1 will adjust the time according to the pressing of the time control button, and each press will increase one hour, and the maximum setting value is 10 hours. The time display lights 1, 2, 3, and 4 represent the corresponding time. After the setting is completed and the countdown begins, the corresponding time display light 1 will be always on, and the buzzer will emit light and sound reminders with intermittent sounds. During the countdown process, the time display light 1 will go out accordingly until all are extinguished. When all are extinguished, it means that the countdown is over. After the time is over, the control circuit stops working, and the two signal lines are in a disconnected state, making the jumper invalid. At this time, the buzzer is in a silent state, and all the time display lights 1 flash.

[0029] Within 30 minutes after the device enters the test state, the Bluetooth control device can be paired with the Bluetooth circuit of the jumper to transmit data and enter the Bluetooth control state. All time display lights 1 will flash, and the buzzer will emit light and sound reminders with intermittent sounds. When the Bluetooth control device is turned off or exceeds the transmission distance, the Bluetooth data transmission fails, and the control circuit and reminder circuit will stop working. The two signal lines are disconnected, making the jumper invalid. At this time, the buzzer is silent and the time display light 1 continues to flash. If the Bluetooth control device is turned on again or approaches the jumper to reach the transmission distance, the Bluetooth control device and the Bluetooth circuit of the jumper will be connected again, the Bluetooth connection will be restored, and the Bluetooth control state will be entered again.

[0030] The control of the time control state takes precedence over the Bluetooth control state. That is, when the jumper is in the Bluetooth control state, you can press the time control button to start the time control state, and the Bluetooth control state will automatically exit and enter the time control state.

[0031] After the Bluetooth control device is paired with the Bluetooth circuit of the jumper, data is transmitted to enter the Bluetooth control state. The Bluetooth control device can turn off Bluetooth, connect or disconnect to make the control circuit of the jumper work or stop working within the set distance. It can only be paired with one Bluetooth control device. The method of unpairing is that the Bluetooth control device can only delete or ignore this jumper before it can pair with other Bluetooth control devices again. This reduces the risk of misoperation and improves safety.

[0032] After the device is powered on, press the time control button to start the time control circuit and enter the time control state. The time display light 1 will control the time according to the pressing of the time control button. Each press will increase one hour, and the maximum setting value is 10 hours. When it is pressed eleven times, the jumper can be closed, and the relay contacts of the control circuit are disconnected, making the jumper function invalid. That is, the two signal lines are disconnected, making the jumper invalid. At this time, the buzzer is silent and all the time display lights 1 flash.

[0033] When the reminder circuit is working, the buzzer will sound an intermittent reminder. When all the time display lights 1 flash, it means that the Bluetooth control state has been entered, and the corresponding time display light 1 is always on, which means that the time control state has been entered. When the buzzer of the reminder circuit is triggered by the relay of the control circuit to make the two signal lines conductive, the buzzer must be in the intermittent buzzing state.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A normally closed switch jumper for mechanical equipment, characterized in that: The invention comprises a circuit board, two signal connectors (6) and two power connectors (5) are arranged at the end of the circuit board, and a power circuit is arranged on the circuit board, the power circuit is electrically connected to the power connector (5), and a relay of a control circuit is connected to the signal connector (6), the signal connector (6) is connected to a connection terminal of a normally closed switch via a signal line, and the relay can control the on and off of the signal line.

2. A mechanical equipment normally closed switch jumper according to claim 1, characterized in that: The power connector (5) is connected to the power supply of the mechanical equipment through a power line, and the power supply is AC / DC 12V-260V; the working voltage output by the power circuit is supplied to the timing circuit, the Bluetooth circuit, the control circuit and the reminder circuit.

3. A normally closed switch jumper for mechanical equipment according to claim 2, characterized in that: A high-level power line can be connected to a signal line to output a high-level signal, or a low-level power line can be connected to a signal line to output a low-level signal.

4. A mechanical equipment normally closed switch jumper according to claim 2, characterized in that: An intermittent buzzer (3) is provided at the reminder circuit; the time control circuit is electrically connected to the time display light (1) and the time control button (2) on the housing; the time control state is entered by pressing the time control button (2).

5. A normally closed switch jumper for mechanical equipment according to claim 4, characterized in that: The time display light (1) can light up correspondingly during the countdown, and the intermittent buzzer (3) can emit a sound reminder.

6. A mechanical equipment normally closed switch jumper according to claim 5, characterized in that: The Bluetooth circuit of the mechanical equipment and the Bluetooth circuit of the jumper are connected to transmit data and enter the Bluetooth control state. The signal is turned on in the Bluetooth control state; turning off, connecting, and disconnecting Bluetooth can determine whether the control circuit works or not.

7. A mechanical equipment normally closed switch jumper according to claim 6, characterized in that: The control of the time control state takes precedence over the Bluetooth control state.

8. A mechanical equipment normally closed switch jumper according to claim 4, characterized in that: Pressing the time control button (2) once increases the time display light (1) by one hour, with the maximum setting value being ten hours; pressing the time control button (2) for the eleventh time closes the jumper.

Images