Belt blanking hopper opening blockage alarm interlocking device

Abstract

A conveyor belt blanking hopper opening blockage alarm interlocking device comprises a rotary sealing valve 1, a conveyor belt 2, a hopper 3 and a blanking pipe 8. A hole is formed in the position 200 mm below the upper edge of the hopper 3, and a flange short section 5 is horizontally welded to the hole; one end of a straight pipe of the flange short section 5 is communicated with the interior of the hopper 3, and the flange end is arranged outside the hopper 3 and fixedly connected with the rotation-resistant material level switch 4; a detachable detection blade 7 is further arranged on the head portion of the output end of the rotation-resisting type material level switch 4. In the normal coke discharging process of dry quenching, when the blanking funnel is blocked by coke blocks, the material level rises gradually and reaches the position of the material level switch, the rotating detection blade is blocked, a switch type electric signal is sent out, and the switch type electric signal is connected to a central control picture to send out a material blocking alarm signal. And during alarming, the signal interlocking upper-level belt stops running, and the interlocking dry quenching rotary sealing valve stops discharging coke. And after the fault is removed, the normal detection state is recovered.

Description

Technical Field

[0001] The utility model relates to the field of industrial conveyor belt safety, and specifically to a material blocking alarm and interlock device for the hopper opening of a conveyor belt Background Art

[0002] Industrial conveyor belts play a crucial role in the conveyor system, and the conveyor belt hopper is an important component connecting different conveyor belts or equipment. Its main function is to accurately convey materials from one conveyor belt or equipment to the designated position of another conveyor belt or equipment, ensuring the continuity and stability of the material during transportation, thereby improving production efficiency. However, when the materials are blocked from feeding smoothly due to reasons such as large particle size or high humidity, if not discovered and disposed of in a timely manner, the hopper opening will gradually become blocked. If the materials cannot be transported in a timely manner, it will cause the accumulation and scattering of materials on the previous conveyor belt. Furthermore, it will cause the conveyor belt to be overloaded, severely worn, the belt to slip and deviate, and the transportation system to break down. Summary of the Invention

[0003] To solve the above technical problems, the present utility model provides a material blocking alarm and interlock device for the hopper opening of a conveyor belt, aiming to solve the problems that when the materials are blocked from feeding smoothly due to reasons such as large particle size or high humidity, if not discovered and disposed of in a timely manner, the hopper opening will gradually become blocked, and further cause problems such as overloading, severe wear, belt slipping, belt deviation, and breakdown of the transportation system on the previous conveyor belt.

[0004] A material blocking alarm and interlock device for the hopper opening of a conveyor belt provided by the present utility model includes a rotary air lock valve 1, a conveyor belt 2, a hopper 3, and a feeding pipe 8; a hole is opened at a position 200 mm downward along the upper edge of the hopper 3, and a flange short section 5 is horizontally welded at the opening; one end of the straight pipe of the flange short section 5 communicates with the inside of the hopper 3, and the flange end is placed outside the hopper 3 and fixedly connected to a non-contact type level switch 4; a detachable detection blade 7 is further provided at the output end head of the non-contact type level switch 4.

[0005] An alarm switch 4.1 and a power-off switch 4.2 are provided inside the non-contact type level switch 4; when the material level in the hopper 3 reaches the specified height, the alarm switch 4.1 operates, and the signal indicating that the level switch detects the presence of materials is transmitted to the DCS screen of the coke dry quenching central control as an alarm signal. The alarm signal is interlocked to stop the operation of the upper conveyor belt and interlocked to stop the discharge of the coke dry quenching rotary air lock valve. The power-off switch (4.2) disconnects the power supply of the non-contact type level switch 4 to stop its rotation. Conversely, when the material level in the hopper 3 drops, when the detection blade no longer receives obstruction as the material level drops, the detection mechanism returns to its original state by relying on the spring tension. The power-off switch 4.2 operates to connect the motor power supply to make it rotate. Subsequently, another alarm switch 4.1 operates to send a signal indicating the absence of materials, and then the rotary air lock valve 1 and the conveyor belt 2 can be opened.

[0006] The outlet of the feeding pipe 2 is in an eight-shaped configuration.

[0007] Further, the length of the impact protection plate 6 is greater than the length of the detection mechanism of the rotary vane level switch 4.

[0008] In summary, the beneficial effects of the present utility model are as follows: During the normal coke discharging process of the dry quenching coke, when the coke block jams in the feeding hopper, the material level will gradually rise. When it reaches the position of the level switch, the rotating detection vane is blocked, and a switching-type electrical signal is sent out, which is connected to the central control screen to send out a jam alarm signal. At the same time of the alarm, the signal interlocks the upper-level belt to stop running and interlocks the rotary seal valve of the dry quenching coke to stop discharging coke. After the fault is eliminated, the normal detection state is restored. It effectively solves the problems such as excessive load, severe wear, belt slipping, deviation, and paralysis of the transportation system of the front-stage belt caused by blockage. Description of the Drawings

[0009] Figure 1 It is a schematic diagram of the overall structure of the present utility model

[0010] Figure 2 It is a partial enlarged view of the present utility model Detailed Embodiment

[0011] The following clearly and completely describes the technical solution of the present utility model with reference to the drawings: As Figure 1-2 shown, the present utility model provides a technical solution: A belt feeding hopper mouth blockage alarm interlock device, including a conveyor belt, a feeding pipe, and a hopper; a hole is opened at a position 200 mm downward from the upper edge of the hopper, and a matching flange short section with a length of 100 mm is horizontally welded at the opening; one end of the straight pipe of the flange short section is communicated with the inside of the hopper, and the flange end is placed outside the hopper and fixedly connected to the rotary vane level switch. An explosion-proof rotary vane level switch is selected, and a detachable detection vane is also provided at the head of the output end of the rotary vane level switch. According to the density and properties of the measured medium, the material and shape of the vane can be selected and replaced.

[0012] An impact protection plate is arranged above the flange short section. Since the movement track of the material when falling is not fixed and it will fly in all directions, and the gravitational acceleration during falling will increase the impact force of the material. Once it hits the detection mechanism inside the hopper, it will cause damage to the detection mechanism. Therefore, a protection plate is welded above the detection mechanism of the rotary vane level switch, which can greatly protect the detection mechanism from being damaged by falling objects.

[0013] The outlet of the feeding pipe is in an eight-shaped structure, which is relatively stable, can withstand a certain degree of material impact, is not easily damaged, and thus extends the service life.

[0014] The length of the impact protection plate is greater than the length of the detection mechanism of the rotary vane level switch.

[0015] As Figure 2As shown in the figure, an alarm switch and a power-off switch are provided inside the rotary level switch; when the material level in the hopper reaches the specified height, the alarm switch is actuated, and the signal indicating that the level switch detects the presence of material is transmitted to the DCS screen of the central control of the coke dry quenching as an alarm signal. The alarm signal is interlocked to stop the operation of the upper conveyor belt and interlocked to stop the discharging of the coke dry quenching rotary seal valve. The power-off switch disconnects the power supply of the rotary level switch, causing it to stop rotating. Conversely, when the material level in the hopper drops, when the detection vane for the drop in the material level is no longer blocked, the detection mechanism returns to its original state by the spring tension. The power-off switch is actuated to connect the power supply of the motor to make it rotate. Subsequently, another alarm switch is actuated to send a signal indicating the absence of material, and then the rotary seal valve and the conveyor belt can be opened.

[0016] The working principle of this utility model is as follows: during the normal coke discharging process of the coke dry quenching, when there is a blockage of coke lumps in the feeding hopper, the material level will gradually rise. When it reaches the position of the level switch, the rotating detection vane is blocked, and a switch-type electrical signal is sent. This electrical signal is connected to the central control screen to send a blockage alarm signal. At the same time as the alarm, the signal is interlocked to stop the operation of the conveyor belt and interlocked to stop the coke discharging of the coke dry quenching rotary seal valve. After the fault is eliminated, the normal detection state is restored.

Claims

1. A belt blanking hopper mouth plugging alarm interlock device, comprising a rotary seal valve (1), a conveyor belt (2), a hopper (3), and a blanking pipe (8); characterized in that: An opening is made at a position 200 mm downward from the upper edge of the hopper (3), and a flange nipple (5) is horizontally welded at the opening; one end of the straight pipe of the flange nipple (5) communicates with the inside of the hopper (3), and the flange end is placed outside the hopper (3) and fixedly connected to the rotary vane level switch (4); a detachable detection vane (7) is further provided at the output end head of the rotary vane level switch (4).

2. The belt blanking hopper inlet blocking alarm interlock device according to claim 1, characterized in that: An alarm switch (4.1) and a power-off switch (4.2) are provided inside the rotary vane level switch (4).

3. The material blocking alarm and interlocking device for the hopper opening of a belt blanking hopper according to claim 1, characterized in that: The outlet of the blanking pipe (8) is in an eight-shaped configuration.

4. A belt blanking hopper mouth material blocking alarm interlock device according to claim 1, characterized in that: An impact protection plate (6) is provided above the flange nipple (5).

5. The material blocking alarm and interlock device for the hopper opening of a belt blanking hopper according to claim 4, characterized in that: The length of the impact protection plate (6) is greater than the length of the detection mechanism of the rotary vane level switch (4).

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