Generator line safety protection device

Abstract

The embodiment of the invention provides a safety protection device for a generator line. The safety protection device comprises a base, a device body, a cable limiting assembly, a switch assembly and a controller, the device body and the cable limiting assembly are arranged on the base at an interval; the cable limiting assembly is used for limiting and binding the cable so as to locally fix the cable; the controller is in communication connection with the switch assembly and is used for automatically controlling on-off of the switch assembly when the device body breaks down. The device has the outstanding advantages of being simple in structure, low in cost and capable of reliably guaranteeing the safety of the unit. The cable is limited and bundled through the cable limiting assembly, a local fixing effect is achieved, the problem that when the cable is connected with the switch assembly, the position of the connecting end is loosened due to mistaken touch or maintenance operation is solved, and the safety of a generator line is improved. And the controller is in communication connection with the switch assembly and is used for automatically controlling the on-off of the switch assembly when the generator breaks down, so that fault points of a unit can be conveniently diagnosed, debugged and maintained.

Description

Technical Field

[0001] The disclosed embodiments belong to the technical field of line protection for thermal power plant units, and specifically relate to a generator line safety protection device. Background Art

[0002] A thermal power generating unit uses coal, oil or combustible gas as fuel to heat the water in the boiler to increase its temperature, and then uses steam with a certain pressure to drive the turbine to generate electricity.

[0003] During use, existing generators are prone to problems such as messy wiring lines and frequent wiring, which may be caused by accidental touching of the connection end or loosening during maintenance operations. This greatly reduces the high error rate caused by unstable cable connections, as well as the problem of accidental disconnection during maintenance operations or when operating the machine.

[0004] Secondly, it is not convenient to use the PLC system to monitor the contacts of various electrical equipment in the machine body, and the monitoring performance is poor, which needs to be developed urgently.

[0005] In view of the above problems, it is necessary to propose a generator line safety protection device that is reasonably designed and effectively solves the above problems. Summary of the invention

[0006] The embodiment of the present disclosure aims to solve at least one of the technical problems existing in the prior art and provide a generator line safety protection device.

[0007] The disclosed embodiment provides a generator line safety protection device, including a base, a device body, a cable limit assembly, a switch assembly and a controller;

[0008] The device body and the cable limiting assembly are spaced apart and arranged on the base; wherein the cable limiting assembly is used to limit and bundle the cables so as to partially fix the cables;

[0009] The controller is in communication connection with the switch assembly and is used for automatically controlling the on and off of the switch assembly when a fault occurs in the device body.

[0010] Optionally, the cable limiting assembly includes a support frame, a support rod, a first clamp, a second clamp, a first elastic member, and a second elastic member;

[0011] The support rod is arranged on the support frame;

[0012] The first ends of the first clamp and the second clamp are hinged to the end of the support rod, and the second ends of the first clamp and the second clamp are openably connected; wherein,

[0013] When the first clamp and the second clamp are clamped together, the cable can be fixed in a limited position;

[0014] The two ends of the first elastic member are elastically connected to the first clamp and the support frame respectively, and are used to control the opening and closing of the first clamp;

[0015] Two ends of the second elastic member are elastically connected to the second clamp and the support frame respectively, and are used to control the opening and closing of the second clamp.

[0016] Optionally, guide grooves are provided on the outer sides of the first clamp and the second clamp, and guide blocks are slidably provided in the guide grooves;

[0017] The guide blocks are respectively connected to the first elastic member and the second elastic member corresponding to them.

[0018] Optionally, the first elastic member and the second elastic member are symmetrically distributed about the support rod.

[0019] Optionally, the number of the cable limiting assemblies is two, and the two cable limiting assemblies are arranged at intervals along the width direction of the base.

[0020] Optionally, a first cooling fan and a temperature sensor are provided on the inner top of the device body;

[0021] The temperature sensor is used to monitor the temperature inside the device body;

[0022] The first cooling fan and the temperature sensor are both electrically connected to the controller; wherein,

[0023] The controller is further used to control the first cooling fan to start working when the temperature sensor detects that the temperature in the device body exceeds a preset temperature.

[0024] Optionally, the base includes a bottom plate and a support column arranged on the bottom plate, and the supported end portion supports the device body;

[0025] The device also includes a second cooling fan disposed on the support column and located at the bottom of the device body;

[0026] The second cooling fan is electrically connected to the controller; wherein,

[0027] The controller is also used to control the second cooling fan to start working when the temperature sensor detects that the temperature in the device body exceeds a preset temperature.

[0028] Optionally, a dustproof ventilation frame is provided on the inner side wall of the support column, and the second cooling fan is provided inside the dustproof ventilation frame.

[0029] Optionally, the base plate is provided with a plurality of ventilation holes corresponding to the device body.

[0030] Optionally, the switch assembly includes a main control integrated switch, a cabin overspeed protection normally closed switch, a vibration protection normally closed switch, a cabin emergency protection normally closed switch and a frequency converter emergency stop protection normally closed switch;

[0031] Wherein, the main control integrated switch is used to control the on / off of the overall power supply of the device body;

[0032] The cabin overspeed protection normally closed switch, vibration protection normally closed switch, cabin emergency protection normally closed switch and inverter emergency stop protection normally closed switch are used to open and close when conditions occur in their corresponding modules respectively.

[0033] The generator line safety protection device of the disclosed embodiment has the outstanding advantages of simple structure, low cost, and reliable protection of the unit safety; the cable limit assembly is used to limit the cable connection, which plays a role of local fixation, reduces the problem of the cable connection end being loose due to accidental touch or maintenance operation, greatly reduces the high error rate caused by unstable connection of the cable connection, and the problem of accidental touch and disconnection during maintenance operation or operation of the machine body, thereby improving the safety of the generator line. The controller is connected to the switch assembly for automatic control of the switch assembly when the generator fails, which is convenient for diagnosis, debugging and maintenance of the fault point of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a side view of a generator line safety protection device according to one embodiment of the present disclosure;

[0035] Figure 2 It is a front view of a generator line safety protection device according to another embodiment of the disclosed embodiment;

[0036] Figure 3 It is a partial enlarged view of a cable limiting assembly in another embodiment of the disclosed embodiment;

[0037] Figure 4 It is a side view of a generator line safety protection device according to another embodiment of the disclosed embodiment;

[0038] Figure 5 A schematic diagram of the connection between a controller and a switch assembly according to another embodiment of the present disclosure;

[0039] Figure 6 This is a control diagram of a system in which a controller, a main control integrated switch, a temperature sensor, and a first cooling fan and a second cooling fan are connected in another embodiment of the disclosed embodiment. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the embodiments of the present disclosure are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] like Figure 1 and Figure 2 As shown, an embodiment of the present disclosure provides a generator line safety protection device 100 , including a base 110 , a device body 120 , a cable limiting assembly 130 , a switch assembly and a controller 140 .

[0042] The device body 120 and the cable limiting assembly 130 are spaced apart from each other on the base 110 ; wherein the cable limiting assembly 130 is used to limit and bundle the cables so as to partially fix the cables.

[0043] The controller 140 is connected to the switch assembly for automatically controlling the on and off of the switch assembly when a fault occurs in the device body 120. The controller 140 can monitor the contacts of various electrical devices in the device body 120 and monitor the working status of the device body in real time.

[0044] It should be noted that the controller 140 can be a PLC or a CPU, etc., which can be selected according to actual needs. As shown in the figure, in this embodiment, the controller 140 can be arranged on the outer side wall of the device body 120.

[0045] It should be further explained that, in this embodiment, the device body 120 can be a small control box.

[0046] The generator line safety protection device of the disclosed embodiment has the outstanding advantages of simple structure, low cost, and reliable protection of the unit safety; the cable limit assembly is used to limit the cable connection, which plays a role of local fixation, reduces the problem of the cable connection end being loose due to accidental touch or maintenance operation, greatly reduces the high error rate caused by unstable connection of the cable connection, and the problem of accidental touch and disconnection during maintenance operation or operation of the machine body, thereby improving the safety of the generator line. The controller is connected to the switch assembly for automatic control of the switch assembly when the generator fails, which is convenient for diagnosis, debugging and maintenance of the fault point of the unit.

[0047] For example, Figure 1 and Figure 3 As shown, the cable limiting assembly 130 includes a support frame 131 , a support rod 132 , a first clamp 133 , a second clamp 134 , a first elastic member 135 and a second elastic member 136 .

[0048] The support rod 132 is disposed on the support frame 131 .

[0049] The first ends of the first clamp 133 and the second clamp 134 are hinged to the end of the support rod 132, and the second ends of the first clamp 133 and the second clamp 134 can be opened and closed. When the first clamp 133 and the second clamp 134 are clamped, the cable can be fixed in position.

[0050] Two ends of the first elastic member 135 are elastically connected to the first clamp 133 and the support frame 131 respectively, so as to control the opening and closing of the first clamp 133 .

[0051] Two ends of the second elastic member 136 are elastically connected to the second clamp 134 and the support frame 131 respectively, so as to control the opening and closing of the second clamp 134 .

[0052] It should be noted that both the first elastic member 135 and the second elastic member 136 may be springs.

[0053] In this embodiment, the elasticity of the first elastic member 135 and the second elastic member 136 can control the opening and closing of the first clamp 133 and the second clamp 134 , thereby facilitating the positioning of the cable between the first clamp 133 and the second clamp 134 .

[0054] For example, Figure 3 As shown, guide grooves 133 a are provided on the outer sides of the first clamp 133 and the second clamp 134 , and guide blocks 133 b are slidably provided in the guide grooves 133 a .

[0055] The guide blocks 133 b are connected to the corresponding first elastic members 135 and second elastic members 136 , respectively.

[0056] The expansion of the first elastic member 135 and the second elastic member 136 cooperates with the guide block 133b to slide along the guide groove 133a, so that the first clamp 133 and the second clamp 134 can be freely opened or clamped, thereby improving the operational flexibility of putting in and taking out the cable.

[0057] Specifically, Figure 3 As shown, when the guide block 133b slides to the left, the first clamp 133 and the second clamp 134 are opened; when the guide block 133b slides to the right, the first clamp 133 and the second clamp 134 are clamped.

[0058] For example, Figure 1 As shown, the first elastic member 135 and the second elastic member 136 are symmetrically distributed about the support rod 132, which can more flexibly control the opening or closing of the first clamp 133 and the second clamp 134.

[0059] Exemplarily, there are two cable limiting assemblies 130 , and the two cable limiting assemblies 130 are spaced apart along the width direction of the base 110 , so that the cables can be limited and bundled more conveniently.

[0060] For example, Figure 2 As shown, a first heat dissipation fan 150 and a temperature sensor 160 are disposed on the inner top of the device body 120 .

[0061] The temperature sensor 160 is used to monitor the temperature inside the device body 120 and transmit the obtained temperature signal to the controller 140 .

[0062] The first cooling fan 150 and the temperature sensor 160 are both electrically connected to the controller 140; Figure 6 As shown, the controller 140 is also used to control the first cooling fan 150 to start working when the temperature sensor 160 detects that the temperature inside the device body 120 exceeds a preset temperature, so as to achieve heat dissipation inside the device body 120.

[0063] For example, Figure 1 , Figure 2 and Figure 4 As shown, the base 110 includes a bottom plate 111 and a support column 112 disposed on the bottom plate 111 , and the end of the support column 112 supports the device body 120 . The cable limiting assembly 130 is disposed on the bottom plate 111 .

[0064] like Figure 2 and Figure 4 As shown, the generator line safety protection device 100 further includes a second cooling fan 170 disposed on the support column 112 and located at the bottom of the device body 120 .

[0065] The second cooling fan 170 is electrically connected to the controller 140; Figure 6 As shown, the controller 140 is also used to control the second cooling fan 170 to start working when the temperature sensor 160 detects that the temperature inside the device body 120 exceeds a preset temperature, so as to dissipate heat at the bottom of the device body 120 and speed up air circulation.

[0066] For example, Figure 2 and Figure 4 As shown, the inner wall of the support column 112 is provided with a dustproof ventilation frame 171, and the second heat dissipation fan 170 is provided inside the dustproof ventilation frame 171. The normal operation of the second heat dissipation fan 170 can be ensured by providing the dustproof ventilation frame 171.

[0067] In this embodiment, when the temperature sensor detects that the internal temperature of the device body is unstable due to long-term operation, the temperature signal monitored by the temperature sensor is received by the controller, and the first cooling fan and the second cooling fan can be controlled to operate, thereby enhancing the internal and external air exchange effect of the device body and ensuring the normal operation of the device body.

[0068] For example, Figure 2and Figure 4 As shown, the bottom plate 111 is provided with a plurality of ventilation holes 180 at the position corresponding to the device body 120. The ventilation holes 180 can discharge the heat dissipated by the second heat dissipation fan 170 in a timely manner.

[0069] For example, Figure 1 , Figure 2 and Figure 5 As shown, the switch assembly includes a main control integrated switch 191, a cabin overspeed protection normally closed switch 192, a vibration protection normally closed switch 193, a cabin emergency protection normally closed switch 194 and a frequency converter emergency stop protection normally closed switch 195.

[0070] The main control integrated switch 191 is used to control the on / off of the overall power supply of the device body 120 .

[0071] In this embodiment, if Figure 6 As shown, when the temperature inside the device reaches a point where the first cooling fan and the second heat fan cannot be controlled, the controller controls the main control integrated switch to respond, disconnecting the power supply of the device body as a whole to avoid dangerous accidents.

[0072] The cabin overspeed protection normally closed switch 192, the vibration protection normally closed switch 193, the cabin emergency protection normally closed switch 194 and the inverter emergency stop protection normally closed switch 195 are used to open and close when conditions occur in their corresponding modules respectively.

[0073] Specifically, the cabin overspeed protection normally closed switch 192 is also called a centrifugal switch, which is generally used for overspeed protection of DC motors to achieve real-time overspeed numerical segment detection. Because the speed of the DC motor is inversely proportional to the magnetic field, once the magnetic field is less than the minimum allowable value, if it exceeds the uncontrollable unstable state, it can be opened and closed with one button.

[0074] The correct name of the vibration protection normally closed switch 193 should be called a vibration sensor, that is, an electronic switch that detects the magnitude of the induced vibration force, transmits the sensing result to the circuit device, and starts the circuit to work.

[0075] The working principle of the cabin emergency protection normally closed switch 194 is: under normal circumstances, the two ends of the switch are connected, that is, the switch is in a closed state. When external detection or triggering (such as fire, smoke and other emergencies) occurs, the circuit inside the switch will be disconnected, thereby cutting off the power supply or stopping the equipment operation to prevent the accident from further expanding.

[0076] The inverter emergency stop protection normally closed switch 195 should be connected to the normally open terminal. The emergency stop switch is used in unforeseen emergency situations and should be considered an emergency measure that may cause equipment damage or personal injury. Connecting the emergency stop switch to the normally open terminal can keep the circuit closed when the emergency stop switch is not pressed, ensuring the safety of equipment and personnel.

[0077] In this embodiment, by electrically connecting the controller to each switch, it is convenient to diagnose, debug and maintain the fault point of the engine body.

[0078] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the embodiments of the present disclosure, but the embodiments of the present disclosure are not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of the present disclosure, and these modifications and improvements are also considered to be within the protection scope of the embodiments of the present disclosure.

Claims

1. A generator line safety protection device, characterized in that: It includes a base, a device body, a cable limit assembly, a switch assembly and a controller; The device body and the cable limiting assembly are spaced apart and arranged on the base; wherein the cable limiting assembly is used to limit and bundle the cables so as to partially fix the cables; The controller is in communication connection with the switch assembly and is used for automatically controlling the on and off of the switch assembly when a fault occurs in the device body.

2. The device according to claim 1, characterized in that The cable limiting assembly comprises a support frame, a support rod, a first clamp, a second clamp, a first elastic member and a second elastic member; The support rod is arranged on the support frame; The first ends of the first clamp and the second clamp are hinged to the end of the support rod, and the second ends of the first clamp and the second clamp are openably connected; wherein, When the first clamp and the second clamp are clamped together, the cable can be fixed in a limited position; The two ends of the first elastic member are elastically connected to the first clamp and the support frame respectively, and are used to control the opening and closing of the first clamp; Two ends of the second elastic member are elastically connected to the second clamp and the support frame respectively, and are used to control the opening and closing of the second clamp.

3. The device according to claim 2, characterized in that The outer sides of the first clamp and the second clamp are provided with guide grooves, and guide blocks are slidably provided in the guide grooves; The guide blocks are respectively connected to the first elastic member and the second elastic member corresponding to them.

4. The device according to claim 2, characterized in that The first elastic member and the second elastic member are symmetrically distributed about the support rod.

5. The device according to any one of claims 1 to 4, characterized in that: The number of the cable limiting assemblies is two, and the two cable limiting assemblies are arranged at intervals along the width direction of the base.

6. The device according to any one of claims 1 to 4, characterized in that A first cooling fan and a temperature sensor are provided on the inner top of the device body; The temperature sensor is used to monitor the temperature inside the device body; The first cooling fan and the temperature sensor are both electrically connected to the controller; wherein, The controller is further used to control the first cooling fan to start working when the temperature sensor detects that the temperature in the device body exceeds a preset temperature.

7. The device according to claim 6, characterized in that The base comprises a bottom plate and a support column arranged on the bottom plate, and the supporting end portion supports the device body; The device also includes a second cooling fan disposed on the support column and located at the bottom of the device body; The second cooling fan is electrically connected to the controller; wherein, The controller is also used to control the second cooling fan to start working when the temperature sensor detects that the temperature in the device body exceeds a preset temperature.

8. The device according to claim 7, characterized in that The inner side wall of the support column is provided with a dustproof ventilation frame, and the second heat dissipation fan is provided inside the dustproof ventilation frame.

9. The device according to claim 7, characterized in that The bottom plate is provided with a plurality of ventilation holes at locations corresponding to the device body.

10. The device according to any one of claims 1 to 4, characterized in that The switch assembly includes a main control integrated switch, a cabin overspeed protection normally closed switch, a vibration protection normally closed switch, a cabin emergency protection normally closed switch and a frequency converter emergency stop protection normally closed switch; Wherein, the main control integrated switch is used to control the on / off of the overall power supply of the device body; The cabin overspeed protection normally closed switch, vibration protection normally closed switch, cabin emergency protection normally closed switch and inverter emergency stop protection normally closed switch are used to open and close when conditions occur in their corresponding modules respectively.

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