Control cabinet of rubber belt bucket elevator

Abstract

The utility model discloses a control cabinet of an adhesive tape bucket elevator. The control cabinet comprises a control cabinet body, a maintenance switch, a contactor, a first start button and a second start button, wherein the maintenance switch, the contactor, the first start button and the second start button are positioned in the control cabinet body; the first start button and the second start button are respectively connected to the central control system and are electrically connected with the central control intermediate relay; a normally open contact of the central control intermediate relay is connected in series with the contactor; the first starting button and the second starting button are arranged to be in linkage, and the first starting button is electrically connected with sound-light alarm equipment of the central control system. The control cabinet of the rubber belt bucket elevator can control the sound-light alarm equipment to give out early warning through the central control system before the equipment is started, and on-site workers are reminded that the equipment is about to be started.

Description

Technical Field

[0001] This utility model relates to the field of safety control, specifically to a control cabinet for a belt bucket elevator. Background Technology

[0002] Belt bucket elevators are key equipment for material transportation in cement production lines, and they are equipped with protection against deviation, speed, and material level.

[0003] Most belt bucket elevators in domestic cement plants adopt a field-priority control method, meaning that field operation has higher priority than the central control DCS system. This method has a relatively simple control principle and is convenient for on-site construction, but it also has certain safety hazards.

[0004] When repairing equipment on-site, power can only be turned on and off in the power room. On-site operation is impossible when the power is off. Due to the large work area on-site, maintenance personnel may be located in relatively concealed environments, or even on different floors from the on-site start button. When using the on-site priority control method, the personnel controlling the on-site equipment have limited visibility and it is difficult to take into account various factors in the environment. Moreover, the audible and visual alarms cannot be activated when the equipment is started on-site, so the on-site maintenance personnel cannot be notified to start the equipment immediately. Therefore, when starting the equipment on-site, some personnel may still remain in the work environment, which poses a great safety hazard and the risk of accidentally turning on the power. Utility Model Content

[0005] The purpose of this utility model is to provide a control cabinet for a belt bucket elevator. This control cabinet can control the audible and visual alarm devices through the central control system to issue a warning before the equipment is started, reminding on-site personnel that the equipment is about to start.

[0006] To achieve the above objectives, this utility model provides a control cabinet for a belt bucket elevator, including a control cabinet body 1 and a maintenance switch 52M located in the control cabinet body 1, a contactor 88 for controlling the power on and off of the elevator motor, a first start button S3 for controlling the motor to start, and a second start button S2.

[0007] The first start button S3 and the second start button S2 are respectively connected to the central control system and electrically connected to the central control intermediate relay K. The normally open contact of the central control intermediate relay K is connected in series with the contactor 88.

[0008] The first start button S3 and the second start button S2 are set to be linked, and the first start button S3 is electrically connected to the audible and visual alarm equipment of the central control system.

[0009] Preferably, the control cabinet of the belt bucket elevator also includes a third start button S1, which is electrically connected to the central control intermediate relay K and the control contactor 88.

[0010] Preferably, the hoisting motor is equipped with a thermal relay 49, and the control cabinet of the belt bucket elevator also includes a first intermediate relay 30X. The normally closed contact of the first intermediate relay 30X is connected in series with the contactor 88, and the first intermediate relay 30X is electrically connected to the thermal relay 49.

[0011] Preferably, the maintenance switch 52M is electrically connected to the hoisting motor and the first intermediate relay 30X.

[0012] Preferably, the control cabinet of the belt bucket elevator is also equipped with a fourth relay EMX, and the normally closed contact of the fourth relay EMX is connected in series with the contactor 88.

[0013] The hoisting motor is equipped with an emergency stop switch ES, which is electrically connected to the fourth relay EMX.

[0014] Preferably, the control cabinet of the belt bucket elevator is also equipped with a second relay SPS, the belt bucket elevator is equipped with a speed measuring switch, the second relay SPS is electrically connected to the speed measuring switch, and the second relay SPS is electrically connected to the central control intermediate relay K.

[0015] Preferably, the control cabinet of the belt bucket elevator is also equipped with a third relay LVS, the belt bucket elevator is equipped with a blockage detection switch, the third relay LVS is electrically connected to the blockage detection switch, and the third relay LVS is electrically connected to the central control intermediate relay K.

[0016] Preferably, a reserved position 2 is also provided in the control cabinet of the belt bucket elevator.

[0017] According to the above technical solution, the control cabinet of the belt bucket elevator of this utility model is equipped with a first start button S3 and a second start button S2. When it is necessary to start the belt bucket elevator, the first start button S3 needs to be pressed first. The first start button S3 is electrically connected to the audible and visual alarm equipment of the central control system. Figure 1 As shown, when the maintenance switch 52 is closed, its normally open auxiliary contact 52(AX) closes, and the central control system receives its switch ready-to-close signal 52. Then, when the first start button S3 is pressed, it inputs a signal to the central control system to start the equipment. After this signal enters the central control system, the central control system will control the on-site audible and visual alarm devices to sound an alarm, reminding the personnel still on-site to evacuate as soon as possible. Then, the second start button S2 is pressed, and the second start button S2 sends a local start signal to the central control system. After receiving the local start signal, the central control system will send a drive signal K. This drive signal controls the central control intermediate relay K to close, energizing the main control circuit, which in turn energizes the contactor 88. The contacts of the contactor 88 close, energizing the primary circuit and starting the motor.

[0018] The first start button S3 and the second start button S2 are linked. Only when the first start button S3 is pressed first and then the second start button S2 will the central control system send a drive signal K to the main control circuit to close the central control intermediate relay K. Activating either button alone, or in the incorrect button sequence, will not close the central control intermediate relay K.

[0019] Therefore, by setting up the control cabinet of the belt bucket elevator, the audible and visual alarm equipment can be activated before starting the equipment. The audible and visual alarm equipment will issue a warning to the staff at the equipment site, so that the staff left at the site can evacuate in time.

[0020] By setting a central control intermediate relay K and connecting its normally open contact in series with contactor 88, the normally open contact of the intermediate relay K closes when the central control system inputs a drive signal K, and remains open when the central control system does not output a drive signal K. This allows the central control system to control the hoisting motor through the control of the intermediate relay K, while still enabling on-site control of the hoisting motor during field operations.

[0021] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a control principle diagram of the control cabinet for a belt bucket elevator.

[0024] Figure 2 This is a schematic diagram of the control cabinet door of a belt bucket elevator;

[0025] Figure 3 This is a layout diagram of the control cabinet of a belt bucket elevator.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Control cabinet body 88 contactor

[0028] S3 First start button S2 Second start button

[0029] K central control intermediate relay S1 third start button

[0030] 49 Thermal Relay 30X First Intermediate Relay

[0031] 52M maintenance switch EMX fourth relay

[0032] ES emergency stop switch SPS second relay

[0033] LVS Third Relay 2 Reserved Position Detailed Implementation

[0034] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0035] A control cabinet for a belt bucket elevator includes a control cabinet body 1, a maintenance switch 52M located inside the control cabinet body 1, a contactor 88 located inside the control cabinet to control the power on and off of the elevator motor, a first start button S3 and a second start button S2 to control the motor to start.

[0036] The first start button S3 and the second start button S2 are connected to the central control system and electrically connected to the central control intermediate relay K. The normally open contact of the central control intermediate relay K is connected in series with the contactor 88.

[0037] The first start button S3 and the second start button S2 are set to be linked, and the first start button S3 is electrically connected to the audible and visual alarm equipment of the central control system.

[0038] Through the implementation of the above technical solution, the control cabinet of the belt bucket elevator is equipped with a first start button S3 and a second start button S2. When it is necessary to start the belt bucket elevator, the first start button S3 must be pressed first. The first start button S3 is electrically connected to the audible and visual alarm equipment of the central control system. Figure 1 As shown, when the maintenance switch 52 is closed, its normally open auxiliary contact 52(AX) closes, and the central control system receives its switch ready-to-close signal 52. Then, when the first start button S3 is pressed, it inputs a signal to the central control system to start the equipment. After this signal enters the central control system, the central control system will control the on-site audible and visual alarm devices to sound an alarm, reminding the personnel still on-site to evacuate as soon as possible. Then, the second start button S2 is pressed, and the second start button S2 sends a local start signal to the central control system. After receiving the local start signal, the central control system will send a drive signal K. This drive signal controls the central control intermediate relay K to close, energizing the main control circuit, which in turn energizes the contactor 88. The contacts of the contactor 88 close, energizing the primary circuit and starting the motor.

[0039] The first start button S3 and the second start button S2 are linked. Only when the first start button S3 is pressed first and then the second start button S2 will the central control system send a drive signal K to the main control circuit to close the central control intermediate relay K. Activating either button alone, or in the incorrect button sequence, will not close the central control intermediate relay K.

[0040] Therefore, by setting up the control cabinet of the belt bucket elevator, the audible and visual alarm equipment can be activated before starting the equipment. The audible and visual alarm equipment will issue a warning to the staff at the equipment site, so that the staff left at the site can evacuate in time.

[0041] By setting a central control intermediate relay K and connecting its normally open contact in series with contactor 88, the normally open contact of the intermediate relay K closes when the central control system inputs a drive signal K, and remains open when the central control system does not output a drive signal K. This allows the central control system to control the hoisting motor through the control of the intermediate relay K, while still enabling on-site control of the hoisting motor during field operations.

[0042] In this embodiment, preferably, the control cabinet of the belt bucket elevator also includes a third start button S1, which is electrically connected to the central control intermediate relay K and controls the contactor 88.

[0043] The control cabinet of the belt bucket elevator is also equipped with a third start button S1. When the equipment is started, pressing the third start button S1 can achieve an emergency stop of the equipment. Figure 1 As shown, when the third start button S1 is pressed, the switch ready-to-close signal 52 sent by the maintenance switch 52 to the central control system will be disconnected. The central control system determines that the switch ready-to-close signal 52 is lost, and will stop sending the drive signal K to the central control intermediate relay K. The contactor 88 will be de-energized, and the hoisting motor will be de-energized, thereby realizing the stop control of the field equipment by the third start button S1.

[0044] Preferably, the first start button (S3), the second start button (S2), and the third start button (S1) are all located on the cabinet door of the control cabinet of the belt bucket elevator, so that the operator can easily operate these control buttons.

[0045] In this embodiment, preferably, the hoisting motor is equipped with a thermal relay 49, and the control cabinet of the belt bucket elevator also includes a first intermediate relay 30X. The normally closed contact of the first intermediate relay 30X is connected in series with the contactor 88, and the first intermediate relay 30X is electrically connected to the thermal relay 49.

[0046] like Figure 1As shown, contactor 88 is connected in series with the normally closed contact of the first intermediate relay 30X and the normally open contact of the central control intermediate relay K. When the central control intermediate relay K is disconnected or the normally open contact of the first intermediate relay 30X is disconnected, contactor 88 will be de-energized. That is, the central control intermediate relay K will not operate, or the first intermediate relay 30X will operate, which will cause contactor 88 to be de-energized, thereby enabling the hoisting motor to be effectively stopped.

[0047] like Figure 1 As shown, thermal relay 49 is used to measure the current in the hoisting motor cable. When the motor is overloaded, the normally open contact of thermal relay 49 will close, the first intermediate relay 30X will activate, and the contactor 88 will be de-energized, thus stopping the hoisting motor.

[0048] In this embodiment, preferably, the maintenance switch 52M is electrically connected to the first intermediate relay 30X.

[0049] When a circuit breaker fault occurs in the maintenance switch 52M, the normally open contact of the maintenance switch 52M closes, the first intermediate relay 30X operates, and the contactor 88 is de-energized, thus stopping the hoisting motor.

[0050] In this embodiment, preferably, a fourth relay EMX is also provided in the control cabinet of the belt bucket elevator, and the normally closed contact of the fourth relay EMX is connected in series with the contactor 88.

[0051] The hoisting motor is equipped with an emergency stop switch ES, which is electrically connected to the fourth relay EMX.

[0052] When the emergency stop switch ES is pressed, the fourth relay EMX is de-energized, the normally closed contact of the fourth relay EMX in the control circuit opens, the contactor 88 is de-energized, and the equipment stops.

[0053] At the same time, when the emergency stop switch ES is pressed, the central control system will also receive an emergency stop signal input. Subsequently, the central control system will no longer output the drive signal K, and the central control intermediate relay K will be disconnected, which will also cause the contactor 88 to lose power. Therefore, the emergency stop switch ES can not only cut off the equipment by controlling the fourth relay EMX in the control circuit, but also achieve the purpose of cutting off the equipment by using the central control system.

[0054] In this embodiment, preferably, a second relay SPS is also provided in the control cabinet of the belt bucket elevator, the belt bucket elevator is provided with a speed measuring switch, the second relay SPS is electrically connected to the speed measuring switch, and the second relay SPS is electrically connected to the central control intermediate relay K.

[0055] The speed measuring switch detects the lifting speed of the belt bucket elevator. When the belt bucket elevator exceeds the speed limit, the speed measuring switch controls the second relay SPS to be energized. After the second relay SPS is energized, it will send an overspeed signal. This overspeed signal is input to the central control system. The central control system controls the central control intermediate relay K to open, the contactor 88 to be de-energized, and the motor to be de-energized.

[0056] In this embodiment, preferably, a third relay LVS is also provided in the control cabinet of the belt bucket elevator, the belt bucket elevator is provided with a blockage detection switch, the third relay LVS is electrically connected to the blockage detection switch, and the third relay LVS is electrically connected to the central control intermediate relay K.

[0057] The material level detection switch is used to detect the actual material level in the lifting bucket. The material level detection switch is normally closed. At the same time, a blockage switch is also set at the lifting bucket position. When the blockage switch detects that the material in the lifting bucket exceeds the preset material level, it will send a blockage signal, close the blockage switch, energize the third relay LVS, and send an LVS signal to the central control system. After receiving the signal, the central control system will stop outputting the drive signal K, the central control intermediate relay K will open, the contactor 88 will be de-energized, and the lifting motor will be stopped.

[0058] In this embodiment, preferably, a reserved position 2 is also provided in the control cabinet of the belt bucket elevator.

[0059] The control cabinet of the belt bucket elevator is also equipped with a reserved position 2, so that other controllers that need to participate in the control of the lifting motor can be placed in the control cabinet of the belt bucket elevator and connected to the control circuit or the central control system.

[0060] If on-site equipment maintenance is required, the main circuit can be disconnected through maintenance switch 52. Maintenance switch 52 can be configured with a lockable structure. When maintenance is required, after disconnecting maintenance switch 52, the staff can lock maintenance switch 52 with a lock that is always carried to prevent other personnel from operating it by mistake and reduce the safety risks during the maintenance process.

[0061] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0062] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0063] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A control cabinet for a belt bucket elevator, characterized in that, Includes the control cabinet body (1) and the maintenance switch (52M) located in the control cabinet body (1), the contactor (88) for controlling the on and off of the hoisting motor, the first start button (S3) for controlling the motor to start and the second start button (S2); The first start button (S3) and the second start button (S2) are respectively connected to the central control system and electrically connected to the central control intermediate relay (K). The normally open contact of the central control intermediate relay (K) is connected in series with the contactor (88). The first start button (S3) and the second start button (S2) are set to be linked, and the first start button (S3) is electrically connected to the audible and visual alarm equipment of the central control system.

2. The control cabinet of the belt bucket elevator according to claim 1, characterized in that, The control cabinet of the belt bucket elevator also includes a third start button (S1), which is electrically connected to the central control intermediate relay (K) and the control contactor (88).

3. The control cabinet of the belt bucket elevator according to claim 1, characterized in that, The hoisting motor is equipped with a thermal relay (49), and the control cabinet of the belt bucket elevator also includes a first intermediate relay (30X). The normally closed contact of the first intermediate relay (30X) is connected in series with the contactor (88), and the first intermediate relay (30X) is electrically connected to the thermal relay (49).

4. The control cabinet of the belt bucket elevator according to claim 3, characterized in that, The maintenance switch (52M) is electrically connected to the hoisting motor and the first intermediate relay (30X).

5. The control cabinet of the belt bucket elevator according to claim 1, characterized in that, The control cabinet of the belt bucket elevator is also equipped with a fourth relay (EMX), and the normally closed contact of the fourth relay (EMX) is connected in series with the contactor (88). The hoisting motor is equipped with an emergency stop switch (ES), which is electrically connected to the fourth relay (EMX).

6. The control cabinet of the belt bucket elevator according to claim 1, characterized in that, The control cabinet of the belt bucket elevator is also equipped with a second relay (SPS). The belt bucket elevator is equipped with a speed measuring switch. The second relay (SPS) is electrically connected to the speed measuring switch and to the central control intermediate relay (K).

7. The control cabinet of the belt bucket elevator according to claim 1, characterized in that, The control cabinet of the belt bucket elevator is also equipped with a third relay (LVS). The belt bucket elevator is equipped with a blockage detection switch. The third relay (LVS) is electrically connected to the blockage detection switch and to the central control intermediate relay (K).

8. The control cabinet of the belt bucket elevator according to claim 1, characterized in that, The control cabinet of the belt bucket elevator also has a reserved position (2).

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