Belt scale unloading mechanism with small dust

Abstract

The utility model discloses a mechanism that belt scale unloading little mechanism, including upper passageway, buffer passageway and lower passageway, hopper, dust absorption pipe, filter jar, one end of upper passageway and lower passageway with buffer passageway intercommunication, filter jar set in the upper portion of buffer passageway, hopper set in the upper end of upper passageway, the utility model discloses a dust absorption pipe inhales the smoke and dust that passes, enters the filter jar and carries out secondary filtration through second filter screen to avoid the generation of raising dust, and the filter jar with buffer passageway between be provided with suction plate, the unloading plate with crossbeam articulate, and be provided with torsional spring in the pivot, when the dust removal ends, the dust that adsorbs falls the corresponding unloading plate, the unloading plate hand dust gravity influence and deflect, and the dust is discharged into the buffer passageway.

Description

Technical Field

[0001] This utility model relates to the field of belt scale unloading assistance, and in particular to a mechanism for minimizing dust generation during belt scale unloading. Background Technology

[0002] The weighing bridge of the belt scale is installed on the conveyor frame. When material passes through, the metering roller detects the weight of the material on the belt conveyor and acts on the weighing sensor through a lever, generating a voltage signal proportional to the belt load. A weighing sensor is mounted on the weighing bridge on the belt scale. During operation, the weight of the material on the belt is sent to the weighing instrument, and the speed signal of the belt conveyor from the speed sensor is also sent to the weighing instrument. The instrument integrates the speed signal and the weighing signal to obtain the instantaneous flow rate and cumulative amount. The speed sensor is directly connected to the large-diameter speed measuring roller and provides a series of pulses. Each pulse represents a belt motion unit, and the frequency of the pulse is proportional to the belt speed. The weighing instrument receives signals from the weighing sensor and the speed sensor, and obtains an instantaneous flow rate value and a cumulative weight value through integration calculation, which are then displayed. Belt scales are also widely used in cement production, and the feeding mechanism is an important connecting component that transports powdery materials to the belt scale. However, the current feeding mechanism on the market has a simple structure, consisting of only a vertical chute with a large height difference. Since it usually transports powdery materials, it lacks a dust prevention mechanism, which will raise a lot of dust during the transportation process, causing environmental pollution.

[0003] Existing patent (CN210709780U) discloses a low-dust belt scale discharge chute, including a first hopper, a second hopper welded to the bottom of the first hopper, an upper chute welded to the bottom of the second hopper, a buffer chute welded to the bottom of the upper chute, a lower chute welded to the bottom of the buffer chute, a discharge port on one side of the lower chute, a fixing strip fixedly connected to the bottom of one side of the lower chute corresponding to the top of the discharge port, a rubber strip fixedly connected to the bottom of the fixing strip, and mounting strips fixedly connected to the bottom of the two adjacent sides and the opposite side of the lower chute corresponding to the discharge port, with a dustproof cloth fixedly connected to the bottom of the mounting strip. This utility model sets up a first hopper, a second hopper, a rubber sheet, and a dustproof cloth, sealing the internal cavity of the discharge chute, allowing dust to settle naturally within the cavity of the discharge chute, reducing the amount of dust diffused into the air.

[0004] The aforementioned patent document states that most of the dust raised inside the chute is contained within the chute and settles naturally, reducing the amount of dust diffusing into the air from the upper chute. This makes it less likely for dust raised when material falls onto the belt scale to diffuse out of the discharge port. The dustproof cloth can be adjusted to control the distance between itself and the belt scale, providing a certain degree of sealing between the bottom of the lower chute and the belt scale. However, dust generated during the material's descent will diffuse from the upper inlet. Even if the lower end of the chute is not sealed, material will accumulate at the bottom during the descent, thus sealing the lower end of the chute. Most of the generated dust will still rise along the edge of the pipe to the inlet, and dust cannot be removed. Utility Model Content

[0005] One objective of this invention is to provide a belt scale mechanism that minimizes dust generation during material feeding, thereby solving at least one of the aforementioned technical problems.

[0006] A further objective of this invention is to prevent dust from spreading from the feed inlet to the outside.

[0007] Another further objective of this invention is to reduce the amount of dust that diffuses from the downpipe into the air.

[0008] In particular, this utility model provides a mechanism for minimizing dust generation during the unloading of a belt scale, comprising an upper channel, a buffer channel, and a lower channel, wherein one end of the upper channel and the lower channel are connected to the buffer channel; A filter tank, wherein the filter tank is disposed at the upper part of the buffer channel; A feeding hopper is provided at the upper end of the upper channel, and an inclined material guide plate is provided inside the feeding hopper. A first filter screen covering the gap is provided at the lower part of the material guide plate. The suction pipe has one end connected to the cavity formed by the hopper and the feed plate, and the other end connected to the filter tank.

[0009] Furthermore, the filter tank is provided with a plurality of second filter screens, which are arranged at equal intervals.

[0010] Furthermore, a feed plate is provided between several of the filter screens, one end of the feed plate is hinged to the crossbeam via a pivot, and the pivot is controlled by a torsion spring.

[0011] Furthermore, an exhaust pipe is provided at the other end of the filter canister away from the suction pipe, and the exhaust pipe is connected to the fan.

[0012] Furthermore, a sealing ring is provided on the outer peripheral wall of the feeding plate.

[0013] The technical effects and advantages of this utility model are as follows: This invention features a filter tank installed at the upper part of the buffer channel. One end of the filter tank is connected to the cavity formed between the hopper and the feed plate via a dust suction pipe. During use, dust is generated in the upper and lower channels, while the lower channel contains flowing material. When the lower channel is filled with a large amount of material, the generated dust moves upwards along the upper and lower parts of the upper and buffer channels. This upward-moving dust passes through the first filter screen, at which point the fan starts drawing air through the dust suction pipe, sucking the dust into the filter tank. The filter undergoes secondary filtration through a second filter screen to prevent dust generation. A suction plate is installed between the filter tank and the buffer channel. The discharge plate is hinged to the crossbeam, and a torsion spring is installed within the rotating shaft. After dust removal, the adsorbed dust falls onto the corresponding discharge plate. The discharge plate is deflected by gravity, discharging the dust into the buffer channel. After discharge, the discharge plate is lifted by the torsion spring of the rotating shaft. It should be noted that during dust filtration, a negative pressure is generated inside the filter tank, forcing the suction plate to tightly adhere and form a sealed cavity, preventing air leakage. Attached Figure Description

[0014] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the right-side structure of this utility model.

[0016] Figure 3 This utility model Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0017] In the diagram: 1. Upper channel, 2. Feed hopper, 201. Feeding plate, 202. First filter screen, 3. Buffer channel, 4. Lower channel, 5. Filter tank, 501. Second filter screen, 502. Feeding plate, 503. Rotating shaft, 504. Crossbeam, 6. Dust suction pipe, 7. Exhaust pipe, 8. Material, 9. Smoke and dust. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a schematic diagram of the right-side structure of this utility model. Figure 3 This utility model Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0020] This embodiment provides a mechanism for minimizing dust generation during belt scale feeding, including an upper channel 1, a buffer channel 3, a lower channel 4, a filter tank 5, a feeding hopper 2, and a dust suction pipe 6. One end of the upper channel 1 and the lower channel 4 is connected to the buffer channel 3. The filter tank 5 is located at the upper part of the buffer channel 3. The feeding hopper 2 is located at the upper end of the upper channel 1, and an inclined material guide plate 201 is provided inside the feeding hopper 2. A first filter screen 202 covering the gap is provided at the lower part of the material guide plate 201. One end of the dust suction pipe 6 is connected to the cavity formed by the feeding hopper 2 and the material guide plate 201, and the other end is connected to the filter tank 5.

[0021] It should be further explained that the filter tank 5 is provided with a number of second filter screens, which are arranged at equal intervals.

[0022] It should be further explained that a feed plate 502 is provided between several of the filter screens. One end of the feed plate 502 is hinged to the crossbeam 504 via a rotating shaft 503, and the rotating shaft 503 is controlled by a torsion spring.

[0023] It should be further noted that an exhaust pipe 7 is provided at the other end of the filter tank 5 away from the suction pipe 6, and the exhaust pipe 7 is connected to the fan.

[0024] It should be further noted that a sealing ring is provided on the outer peripheral wall of the feed plate 502.

[0025] Specific Example 1, such as Figure 1 As shown, the present invention provides a mechanism for reducing dust generation during the material feeding process of a belt scale. Its purpose is to effectively control and collect dust at key nodes in the material conveying process through multi-stage buffering, sealing and filtration, thereby significantly reducing dust generation during the feeding process.

[0026] The mechanism mainly includes an upper channel 1, a buffer channel 3, a lower channel 4, a filter tank 5, a discharge hopper 2, and a dust suction pipe 6.

[0027] The upper channel 1 and lower channel 4 are arranged vertically, with one end of each channel connected to the buffer channel 3, forming a "Z"-shaped material flow path 8. This non-linear design effectively slows down the falling speed of the material 8, reduces impact energy, and thus reduces dust generation and dispersion at the source.

[0028] The filter canister 5 is fixedly installed on the upper part of the buffer channel 3, and its interior is constructed as a multi-stage filtration space. Specifically, several second filter screens are vertically arranged inside the filter canister 5. These second filter screens are metal filter screens with different mesh sizes and are arranged at equal intervals to form a gradient filtration layer from coarse to fine, which is used to capture dust particles of different sizes.

[0029] The feed hopper 2 is welded or fixed to the upper inlet of the upper channel 1 by a flange, and is the initial stage for material 8 to enter the system. To further suppress dust at this location, a guide plate 201 is inclinedly installed inside the feed hopper 2. This guide plate 201 not only guides the material 8 and prevents blockage, but also leaves a certain gap between its lower part and the inner wall of the feed hopper 2, which is completely covered by a first filter screen 202. The first filter screen 202 can suck in and filter the dust that is squeezed upwards.

[0030] The suction pipe 6 is a key negative pressure suction component. One end of it is connected to the cavity formed between the feed hopper 2 and the feed plate 201, and the other end is connected to the upper cavity of the filter tank 5. In this way, the dust that overflows at the feed hopper 2 can be sucked into the filter tank 5 for processing in a timely manner.

[0031] To ensure the continuous and stable operation of the filtration system, an exhaust pipe 7 is installed at the top of the other end of the filter tank 5 away from the suction pipe 6. This exhaust pipe 7 is connected to an external fan (not shown in the figure). The continuous operation of the fan creates a stable negative pressure inside the filter tank 5, which not only provides suction for the suction pipe 6, but also forces the airflow carrying dust to pass through multiple layers of second filters in sequence. The dust is trapped, and the purified air is discharged through the exhaust pipe 7.

[0032] Example 2 Based on Example 1, this example optimizes the internal structure of the filter tank 5 to solve the clogging problem that may be caused by dust accumulation on the filter screen.

[0033] Referring to the figure, inside the filter tank 5, a feed plate 502 is provided between every two layers of the second filter screen. One end of the feed plate 502 is hinged to a crossbeam 504 welded to the inner wall of the filter tank 5 via a pivot 503, allowing the feed plate 502 to swing within a certain angle around the pivot 503. A torsion spring (not shown in the figure) is fitted on the pivot 503. In its natural state, the spring force of the torsion spring keeps the feed plate 502 in a horizontal or slightly inclined receiving position.

[0034] When dust accumulates to a certain weight on the surface of the second filter screen, it falls onto the discharge plate 502 below. The accumulated dust puts a load on the discharge plate 502. When its weight overcomes the spring force of the torsion spring, the discharge plate 502 instantly flips downward, unloading the accumulated dust into the collection device below or directly back into the material flow 8. After unloading, the discharge plate 502 quickly returns to its original position under the action of the torsion spring. This design enables automatic, intermittent cleaning of dust inside the filter tank 5, effectively preventing filter screen clogging and ensuring the long-term dust removal efficiency of the system.

[0035] In addition, to maintain a sealed negative pressure environment inside the filter tank 5, a groove is formed on the outer peripheral wall of the feed plate 502, and a sealing ring (such as a rubber sealing ring) is embedded in the groove. When the feed plate 502 is in a horizontal closed state, the sealing ring fits tightly against the inner wall of the filter tank 5, ensuring good airtightness and preventing airflow short-circuiting, which would affect the dust removal effect.

[0036] Working principle: Material 8 is fed into the hopper 2, guided by the feed plate 201 and initially intercepted by the first filter screen 202, before entering the upper channel 1. Subsequently, material 8 is buffered and decelerated by the buffer channel 3, and finally falls stably onto the weighing belt of the belt scale through the lower channel 4. During this process, dust generated in the hopper 2 and buffer channel 3 is drawn into the filter tank 5 by the suction pipe 6 under the negative pressure generated by the fan. The dust is captured after being finely filtered by multiple layers of second filters in the filter tank 5, while clean air is discharged through the exhaust pipe 7. Dust accumulated at the bottom of the filter tank 5 can be periodically cleaned via the automatic operation of the feed plate 502 or the manual dust removal port (not shown in the figure).

[0037] In specific use, a filter tank 5 is installed at the upper part of the buffer channel 3. One end of the filter tank 5 is connected to the cavity formed between the hopper 2 and the feed plate 201 through the dust suction pipe 6. During use, dust is generated in the upper part of the upper channel 1, buffer channel 3, and the upper half of the lower channel 4, while the lower half contains flowing material 8. When the lower channel 4 is filled with a large amount of material 8, the generated dust will move upward along the upper part of the upper channel 1 and the upper half of the buffer channel 3. The upward-moving dust will pass through the first filter screen 202. At this time, the fan starts to draw air, and the dust 9 passing through the dust suction pipe 6 is sucked into the filter tank 5. The second filter 501 performs secondary filtration to prevent dust generation. A suction plate is installed between the filter tank 5 and the buffer channel 3. The discharge plate 502 is hinged to the crossbeam 504. A torsion spring is installed inside the rotating shaft 503. After dust removal, the adsorbed dust falls onto the corresponding discharge plate 502. The discharge plate 502 deflects under the influence of gravity, discharging the dust into the buffer channel 3. After discharge, the discharge plate 502 is lifted by the torsion spring of the rotating shaft 503. It should be noted that during dust filtration, a negative pressure is generated inside the filter tank 5, forcing the suction plate to tightly adhere and form a sealed cavity to prevent air leakage.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanism for minimizing dust generation during conveyor belt weighing, characterized in that, include, The upper channel (1), the buffer channel (3), and the lower channel (4) are connected at one end to the buffer channel (3); A filter tank (5) is disposed at the upper part of the buffer channel (3); The hopper (2) is located at the upper end of the upper channel (1), and an inclined feeder plate (201) is provided inside the hopper (2). A first filter screen (202) covering the gap is provided at the lower part of the feeder plate (201). The suction pipe (6) is connected at one end to the cavity formed by the hopper (2) and the feed plate (201), and at the other end to the filter tank (5).

2. The mechanism for minimizing dust generation during conveyor belt weighing according to claim 1, characterized in that, The filter tank (5) is provided with a number of second filter screens (501), which are arranged at equal intervals.

3. The mechanism for minimizing dust generation during conveyor belt weighing according to claim 2, characterized in that, A feed plate (502) is provided between several second filter screens (501). One end of the feed plate (502) is hinged to the crossbeam (504) via a pivot (503), and the pivot (503) is controlled by a torsion spring.

4. The mechanism for minimizing dust generation during conveyor belt weighing according to claim 1, characterized in that, An exhaust pipe (7) is provided at the other end of the filter tank (5) away from the suction pipe (6), and the exhaust pipe (7) is connected to the fan.

5. The mechanism for minimizing dust generation during conveyor belt weighing according to claim 3, characterized in that, A sealing ring is provided on the outer peripheral wall of the feed plate (502).

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