Explosion-proof three-phase asynchronous motor with overload protection function

Abstract

The utility model relates to the technical field of motor protection, in particular to an explosion-proof three-phase asynchronous motor with an overload protection function, which comprises a motor body, a conveyor belt assembly arranged on one side of the motor body, and a weighing assembly arranged on one side of the conveyor belt assembly and used for detecting the weight of articles. A control assembly for performing on-off control on the motor body is arranged below the motor body, the control assembly comprises a rotary switch, and the weighing assembly presses the rotary switch when an object is weighed. When the conveyor belt is used in the conveying field, under the condition that current and voltage are kept unchanged, the weighing assembly and the control assembly are arranged on one side of the conveyor belt assembly, objects to be conveyed are weighed through the weighing assembly, and when the detected weight of the objects enables the rotary switch to be pressed and turned to be closed, the motor body is powered off, and the motor body is powered off. That means, the conveyor belt assembly driven by the motor body cannot drive the object, pre-treatment of the motor body is achieved, and the possibility of overload of the motor body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor protection, and specifically, to an explosion-proof three-phase asynchronous motor with an overload protection function. Background Art

[0002] The overload protection of a motor is a device or system for monitoring and preventing the motor from overloading. It aims to ensure that the motor operates within the normal operating range and takes appropriate measures to prevent damage or failure when the load exceeds the rated value.

[0003] Currently, the overload protection of most motors adopts methods such as thermal elements, overload relays, current protectors, and electronic overload protection devices. For example, in the conveyor belt field, when the motor is used as the driving part, these methods are also adopted. It is necessary to install such detection devices inside the motor and achieve the overload protection of the motor by detecting the temperature and current overload of the motor. However, the above triggering is after-the-fact triggering, that is, the motor can be protected only when the set conditions are reached, and the motor itself is already in a loaded state.

[0004] In view of this, we propose an explosion-proof three-phase asynchronous motor with an overload protection function. Summary of the Utility Model

[0005] The purpose of the present utility model is to solve the above-mentioned drawbacks and provide an explosion-proof three-phase asynchronous motor that cuts off the power according to the weight of the item in the conveyor field to achieve the purpose of overload protection.

[0006] Under the condition that the current and voltage remain unchanged, by setting a weighing component and a control component on one side of the conveyor belt assembly, using the weighing component to weigh the item to be conveyed, when the weight of the detected item presses the rotary switch to turn off, the motor body is powered off, which means that the conveyor belt assembly driven by the motor body cannot drive the item, realizing the pre-treatment of the motor body and reducing the possibility of the motor body being overloaded.

[0007] Therefore, the present utility model provides an explosion-proof three-phase asynchronous motor with an overload protection function, including a motor body. One side of the motor body is provided with a conveyor belt assembly driven by the motor body. One side of the conveyor belt assembly is provided with a weighing component for detecting the weight of the item. Below the motor body is provided with a control component for controlling the switch of the motor body. The control component includes a rotary switch, and the weighing component presses the rotary switch when weighing the item.

[0008] As a further improvement of this technical solution, the weighing component includes a placement table and two side plates. A stop bar is provided at the bottom of the placement table, and sliding grooves are symmetrically provided inside the side plates. The stop bar is slidably connected to the sliding grooves.

[0009] As a further improvement of this technical solution, the chute on the side of the side plate close to the control component is completely open. The stop bar on the side close to the control component passes through the chute of the side plate, and one end of the stop bar is located above the rotary switch.

[0010] As a further improvement of this technical solution, a spring is provided between the bottom of the stop bar and the bottom of the chute of the side plate. The spring is used for weighing the item and resetting the placement table after the item is weighed.

[0011] As a further improvement of this technical solution, the control component further includes a control console. The rotary switch is rotatably connected to one side of the control console, and the control console is used to supply power to the motor body.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In this explosion-proof three-phase asynchronous motor with overload protection function, when the current and voltage remain unchanged, by setting a weighing component and a control component on one side of the conveyor belt component, the weighing component is used to weigh the item to be conveyed. When the weight of the detected item causes the rotary switch to be pressed and turned off, the motor body is powered off, which means that the conveyor belt component driven by the motor body cannot drive the item, realizing the pre-treatment of the motor body and reducing the possibility of the motor body being overloaded. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0015] Figure 2 It is a schematic diagram of the control component of the embodiment;

[0016] Figure 3 It is a schematic diagram of the weighing component of the embodiment.

[0017] The meanings of each label in the figure are as follows:

[0018] 100, conveyor belt component;

[0019] 200, weighing component; 201, placement table; 202, side plate; 203, stop bar; 204, spring;

[0020] 300, control component; 301, control console; 302, rotary switch; 303, motor body. Detailed Embodiments

[0021] Currently, the overload protection of most motors adopts methods such as thermal components, overload relays, current protectors, and electronic overload protection devices. For example, in the conveyor belt field, the motor is used as an active driving part and these methods are also adopted. It is necessary to install such detection devices inside the motor and realize the overload protection of the motor by detecting the temperature and current overload of the motor. However, the above trigger is a post-event trigger, that is, the motor can be protected only when the set conditions are reached, and the motor itself is already in a loaded state.

[0022] As Figures 1 - 3 Shown in the figure, this embodiment provides an explosion-proof three-phase asynchronous motor with overload protection function, including a motor body 303. A conveyor belt assembly 100 driven by the motor body 303 is arranged on one side of the motor body 303. Considering that the heavier the items on the conveyor belt assembly 100, the greater the current for the motor body 303 to drive the conveyor belt assembly 100, and the more likely it is to have an overload situation. Therefore, a weighing assembly 200 for weighing the items is arranged on one side of the conveyor belt assembly 100, and a control assembly 300 for switching control of the motor body 303 is arranged below the motor body 303. Considering the weight limit of the items, the control assembly 300 includes a rotary switch 302, and the weighing assembly 200 presses the rotary switch 302 when weighing the items.

[0023] The improvement of this embodiment lies in: under the condition that the current and voltage remain unchanged, by arranging a weighing assembly 200 and a control assembly 300 on one side of the conveyor belt assembly 100, the weighing assembly 200 is used to weigh the items to be conveyed. When the weight of the detected items causes the rotary switch 302 to be pressed and turned off, the motor body 303 is powered off, which means that the conveyor belt assembly 100 driven by the motor body 303 cannot drive the items, realizing the pre-treatment of the motor body 303 and reducing the possibility of overload of the motor body 303.

[0024] Considering the introduction of the weighing assembly 200 and the control assembly 300, therefore, the second embodiment of the present invention is shown.

[0025] The weighing component 200 includes a placement table 201 and two side plates 202. A stop bar 203 is provided at the bottom of the placement table 201. Symmetrically arranged chutes are provided inside the side plates 202. The stop bar 203 is slidably connected to the chutes. The chute on the side of the side plate 202 close to the control component 300 is completely open. The stop bar 203 on the side close to the control component 300 passes through the chute of the side plate 202. One end of the stop bar 203 is located above the rotary switch 302. A spring 204 is provided between the bottom of the stop bar 203 and the bottom of the chute of the side plate 202. The spring 204 is used for item weighing and the reset of the placement table 201 after item weighing. When an item is placed on the placement table 201, the spring 204 is compressed, and the stop bar 203 slides along the chute of the side plate 202. When the weight of the item exceeds the power limit of the motor body 303, the stop bar 203 slides downward and applies a force to the rotary switch 302, causing the rotary switch 302 to be pressed and turned off, shutting off the power supply to the control console 301 and cutting off the power to the motor body 303, reducing the possibility of the motor body 303 being overloaded. The control component 300 further includes a control console 301. The rotary switch 302 is rotatably connected to one side of the control console 301. The control console 301 is used to supply power to the motor body 303.

[0026] In summary, the working principle of this solution is as follows:

[0027] Turn the rotary switch 302 to the horizontal position to supply power to the motor body 303 by the control console 301, so that the motor body 303 drives the conveyor belt component 100 to rotate. Place the item on the placement table 201. The spring 204 is compressed, and the stop bar 203 slides along the chute of the side plate 202. When the weight of the item exceeds the power limit of the motor body 303, the stop bar 203 slides downward and applies a force to the rotary switch 302, causing the rotary switch 302 to be pressed and turned off, shutting off the power supply to the control console 301 and cutting off the power to the motor body 303, reducing the possibility of the motor body 303 being overloaded.

[0028] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A flameproof three-phase asynchronous motor with overload protection function, comprising a motor body (303), characterized in that: A conveyor belt assembly (100) driven by the motor body (303) is provided on one side of the motor body (303); a weighing assembly (200) for detecting the weight of an item is provided on one side of the conveyor belt assembly (100); a control assembly (300) for controlling the on / off of the motor body (303) is provided below the motor body (303); the control assembly (300) includes a rotary switch (302); and the weighing assembly (200) presses the rotary switch (302) when weighing an item.

2. The flameproof three-phase asynchronous motor with overload protection function according to claim 1 is characterized in that: The weighing assembly (200) comprises a placing platform (201) and two side panels (202); a blocking rod (203) is provided at the bottom of the placing platform (201); sliding grooves are symmetrically provided in the side panels (202); and the blocking rod (203) is slidably connected in the sliding grooves.

3. The flameproof three-phase asynchronous motor with overload protection function according to claim 2 is characterized in that: The slide groove of the side plate (202) close to the control assembly (300) is completely open, the blocking rod (203) close to the control assembly (300) passes through the slide groove of the side plate (202), and one end of the blocking rod (203) is arranged above the rotary switch (302).

4. The flameproof three-phase asynchronous motor with overload protection function according to claim 3 is characterized in that: A spring (204) is provided between the bottom of the blocking rod (203) and the bottom of the slide groove of the side plate (202), and the spring (204) is used for bearing the weight of the object and for resetting the placement platform (201) after the object has been bearing the weight.

5. The flameproof three-phase asynchronous motor with overload protection function according to claim 1 is characterized in that: The control assembly (300) further comprises a control console (301), the rotary switch (302) is rotatably connected to one side of the control console (301), and the control console (301) is used to supply power to the motor body (303).

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