CN220333654U

CN220333654U - Full coal detection device of coal hopper

Info

Publication number: CN220333654U
Application number: CN202321994110.5U
Authority: CN
Inventors: 黄健超; 颜奕刚; 林春将; 李劲锋; 章凯; 连晖
Original assignee: Fujian Hongshan Thermoelectricity Co ltd
Current assignee: Fujian Hongshan Thermoelectricity Co ltd
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2024-01-12
Anticipated expiration: 2033-07-27

Abstract

The utility model relates to the technical field of coal conveying equipment, in particular to a full coal detection device of a coal hopper, which comprises a belt conveyor belt, the coal hopper, a limit switch assembly, an induction plate, a spring, a placing plate and a PLC (programmable logic controller); the limit switch assembly comprises a rotary limit switch arranged on the placing plate and a mechanical swing arm arranged on a rotary shaft of the rotary limit switch; the induction plate is fixed at the first end of the mechanical swing arm; the upper end of the spring is fixed at the second end of the mechanical swing arm, and the lower end of the spring is fixed on the placing plate; the tail end of the belt conveyor belt in the moving direction is arranged right above the coal hopper, a notch is formed in the upper end of the side face of the coal hopper, and the notch is located right above the induction plate; the rotary limit switch and the belt conveyer belt are respectively and electrically connected with the PLC. The utility model can judge whether the coal hopper is full in time, and can automatically adjust the start and stop of the belt conveyor belt, thereby avoiding the coal overflow condition of the coal hopper.

Description

Full coal detection device of coal hopper

Technical Field

The utility model relates to the technical field of coal conveying equipment, in particular to a full coal detection device of a coal dropping hopper.

Background

In the process of coal material production and transportation, a coal dropping hopper is one of important equipment for coal loading and unloading, and a coal conveying belt is usually adopted to be matched with the coal dropping hopper to convey coal raw materials to a coal conveying pipeline, however, when inferior coal is conveyed, the coal conveying pipeline is often blocked, so that a large amount of coal overflows from a feed inlet of the coal dropping hopper. There is not reliable sensitive device that detects excessive coal among the prior art, needs the manual judgment coal to fill up the coal hopper, causes the feed inlet to spill the coal after the stifled coal, needs workman to clear up the worksite, increases workman's work load, wastes time and energy. If the overflowed coal is not cleaned in time, even coal shortage in a coal bunker can be caused, the unit is stopped, normal production is affected, and serious loss is caused.

At present, the coal blockage is mainly prevented by designing an anti-blockage coal dropping hopper, so that coal overflow is prevented. For example, a novel arc-shaped vibration anti-blocking coal hopper device disclosed in Chinese patent publication No. CN217482796U can reduce blocking outside a coal hopper by arranging a pneumatic air hammer to vibrate, but under the conditions of excessive coal quantity and wet coal quality, the vibration can increase the density of the discharged coal, further tamp the coal, the coal can not be cleaned timely, the risk of full coal in the coal hopper still exists, and if the coal is not found timely, the operation of a machine can be influenced.

Disclosure of Invention

Therefore, in order to solve the above problems, the utility model provides a full coal detection device for a coal hopper, so as to more accurately and reliably judge whether the coal hopper is full or not, and avoid the coal overflow condition of the coal hopper.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a full coal detection device of a coal dropping hopper comprises a belt conveyor belt, the coal dropping hopper, a limit switch assembly, an induction plate, a spring, a placing plate and a PLC;

the limit switch assembly comprises a rotary limit switch arranged on the placing plate and a mechanical swing arm arranged on a rotary shaft of the rotary limit switch, and when the mechanical swing arm rotates, the rotary shaft of the rotary limit switch is driven to synchronously rotate;

the induction plate is fixed at the first end of the mechanical swing arm; the upper end of the spring is fixed at the second end of the mechanical swing arm, and the lower end of the spring is fixed on the placing plate, so that the mechanical swing arm is in a horizontal state;

the tail end of the belt conveyor belt in the moving direction is arranged right above the coal hopper, a notch is formed in the upper end of the side face of the coal hopper, and the notch is located right above the induction plate;

the rotary limit switch and the belt conveyer belt are respectively and electrically connected with the PLC.

Further, the intelligent control system also comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the PLC.

Further, the intelligent control system further comprises a display screen, and the display screen is electrically connected with the PLC.

By adopting the technical scheme, the utility model has the beneficial effects that: when the coal hopper is full of coal, the coal blocks in the coal hopper start to fall onto the induction plate from the notch, the coal blocks falling onto the induction plate enable the mechanical swing arm to rotate, and further the rotating shaft of the rotating limit switch is driven to synchronously rotate, so that the rotating limit switch is conducted to generate an electric signal to be transmitted to the PLC, and the PLC controls the belt conveyor belt to stop running, so that the coal overflow condition is avoided.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a block diagram of the circuit connection of the present utility model.

Detailed Description

The utility model will now be further described with reference to the drawings and detailed description.

Referring to fig. 1 and 2, the present embodiment provides a full coal detection device of a coal hopper, which includes a belt conveyor 1, a coal hopper 2, a limit switch assembly 3, an induction plate 4, a spring 5, a placement plate 6, and a PLC controller 7.

The limit switch assembly 3 includes a rotation limit switch 32 mounted on the placement board 6 and a mechanical swing arm 31 disposed on a rotation axis of the rotation limit switch 32, where the rotation of the mechanical swing arm 31 drives the rotation axis of the rotation limit switch 32 (the rotation axis is not identified in the figure, but a person skilled in the art will understand the position of the rotation axis on the rotation limit switch 32) to rotate synchronously.

The induction plate 4 is fixed at a first end of the mechanical swing arm 31; the upper end of the spring 5 is fixed at the second end of the mechanical swing arm 31, and the lower end of the spring 5 is fixed on the placing plate 6, so that the mechanical swing arm 31 is in a horizontal state when the sensing plate 4 does not receive coal.

The tail end of the belt conveyor belt 1 in the moving direction is arranged right above the coal hopper 2, a notch 21 is formed in the upper end of the side face of the coal hopper 2, and the notch 21 is located right above the induction plate 4. The coal blocks are conveyed to the coal dropping hopper 2 through the belt conveyor 1, and when the coal dropping hopper 2 is full of coal, the coal blocks can fall onto the induction plate 4 from the notch 21.

The rotation limit switch 32 and the belt conveyor 1 are respectively electrically connected with the PLC controller 7.

The arrangement of the induction plate 4 in the utility model can increase the contact area of the dropped coal blocks and the device, and avoid the condition that the device refuses to move or responds untimely. When the coal blocks fall on the sensing plate 4, the first end of the mechanical swing arm 31 connected with the sensing plate 4 is subjected to downward force, so that the mechanical swing arm 31 rotates, the spring 5 stretches, downward force is generated on the second end of the mechanical swing arm 31 when the spring 5 stretches, the mechanical swing arm 31 is prevented from further rotating, and when the moment on two sides reaches balance, the mechanical swing arm 31 stops rotating, so that the problem that the moment of the rotary limit switch 32 is small and misoperation is easy is solved by the arrangement of the spring 5. The rotation limit switch 32 is common knowledge in the art, and is not described herein.

When the mechanical swing arm 31 rotates to a certain angle, the rotation limit switch 32 is triggered to be turned on (according to different types of the rotation limit switch 32, the rotation angles of the mechanical swing arm 31 are different, and a person skilled in the art should understand the selection of the rotation limit switch 32).

In this embodiment, the system further includes an audible and visual alarm 8, where the audible and visual alarm 8 is electrically connected to the PLC controller 7. The setting of audible and visual alarm 8 can send audible and visual alarm signal after coal hopper 2 is full of coal, reminds the staff.

In this embodiment, the device further includes a display screen 9, where the display screen 9 is electrically connected to the PLC controller 7. The display screen 9 is provided, so that whether the coal hopper 2 is in a full coal state or not can be displayed on the display screen 9.

More specifically, the working principle of the utility model is as follows:

when the coal in the coal hopper 2 reaches the lower edge of the notch 21, the coal blocks start to fall down onto the induction plate 4 from the notch 21, the gravity and the impact force of the coal blocks give the induction plate 4 downward force, and the moment formed by the downward force needs to be balanced firstly; when the coal blocks are increased, the rotating shaft of the rotating limit switch 32 synchronously rotates to reach limit, so that the rotating limit switch 32 is conducted to generate an electric signal to be transmitted to the PLC 7, the PLC 7 controls the belt conveyor belt 1 to stop running, and controls the audible and visual alarm 8 to send out an audible and visual alarm signal, and the display screen 9 displays a full coal state, so that workers are reminded of full coal. The utility model can accurately judge whether the coal hopper 2 is full of coal, and avoid the occurrence of coal overflow.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The full coal detection device of the coal dropping hopper is characterized by comprising a belt conveyor belt, the coal dropping hopper, a limit switch assembly, an induction plate, a spring, a placing plate and a PLC (programmable logic controller);

2. The full coal detection device of the coal hopper of claim 1, further comprising an audible and visual alarm, wherein the audible and visual alarm is electrically connected with the PLC controller.

3. The coal hopper full detection device according to claim 1 or 2, further comprising a display screen, wherein the display screen is electrically connected with the PLC controller.