A chute blockage detection device

Abstract

The utility model relates to a chute blocking material detection device belongs to metallurgical equipment technical field. The utility model's technical scheme is: the pivot footboard (1) is installed in one side of chute lateral wall, one end of pivot (10) is fixed on pivot footboard (1), and the other end is connected below rotary detection arm (16), one end of rotary detection arm (16) extends into the back half of chute, and the blocking plate (17) is installed on rotary detection arm (16), and the limiting response iron sheet (15) is welded in one end of rotary detection arm (16) not extending into chute, and is located above proximity switch (6). The utility model has the beneficial effect that can detect the chute has appeared the blocking material condition in time accurately under the condition that the chute appears the slight blocking material between upstream and downstream belts, avoids the accident of the chute blocking dead influence production.

Description

Technical Field

[0001] This utility model relates to a chute blockage detection device, belonging to the field of metallurgical equipment technology. Background Technology

[0002] In ironmaking and coking plants, the raw material conveying system mainly consists of multiple belts of varying lengths. Material from the upstream belt passes through a guide chute to accurately land on the downstream belt, ensuring no splashing or spillage occurs during transport. During the transport of materials, it's inevitable that highly viscous materials will stick together, large lumps will form, or frozen lumps will accumulate in winter. If these materials accumulate, they can obstruct the chute's flow, causing material to pile up in a cone shape, leading to a break in the downstream belt. If this is not detected and addressed promptly, the accumulated material can push against the belt rollers, causing a fire due to friction, resulting in significant economic losses for the company with potentially disastrous consequences.

[0003] After a blockage occurs, a significant amount of manpower, resources, and time are required for cleanup. The confined space within the belt conveyor station, coupled with the material becoming stuck in the chute, makes mechanized cleanup impossible. Only one or two people can work in this confined space, resulting in low efficiency, high labor intensity, and long cleaning times. Severe material adhesion to the walls poses a constant risk of collapse, crushing, and suffocation, thus creating a serious potential safety hazard. The original design included a blockage detector, but due to the harsh environment and the fact that the detector used a small, constantly rotating motor that relied on current detection for alarms, the failure rate was high, frequently resulting in false alarms and missed alarms. Therefore, the equipment's utilization rate was low, and its effectiveness in practical application was insufficient for the specific conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a chute blockage detection device. By applying the "lever principle," when material slides down from the top of the material pile and reaches the height of the baffle plate, it drives the rotating detection arm to deflect along the shaft, thereby triggering a proximity switch to promptly send an alarm and shutdown signal to the central control room. This device can detect chute blockage in a timely and accurate manner when there is slight blockage in the chute between the upstream and downstream conveyors, avoiding accidents that could lead to complete chute blockage and production disruptions. It eliminates the need for a small electric motor blockage detector, significantly improving reliability, saving energy, and solving the aforementioned problems in the background technology.

[0005] The technical solution of this utility model is: a chute blockage detection device, comprising a rotating shaft base plate, a limiting bracket, a proximity switch, a detection arm stop, a rotating shaft, a rotating shaft sleeve, a limiting sensing iron plate, a rotating detection arm, and a baffle plate. The rotating shaft base plate is installed on one side of the chute sidewall, with its height matching the site requirements. The rotating shaft sleeve is fitted onto the rotating shaft, with one end of the rotating shaft fixed to the rotating shaft base plate and the other end connected to the lower part of the rotating detection arm. One end of the rotating detection arm extends into the rear half of the chute, and the baffle plate is installed on the rotating detection arm. The detection arm stop is installed on the rotating shaft base plate, with its position matching that of the rotating detection arm. The proximity switch is fixed to the rotating shaft base plate via the limiting bracket, and the limiting sensing iron plate is welded to the end of the rotating detection arm that does not extend into the chute, located above the proximity switch.

[0006] The pivot foot plate is installed at 1 / 2 to 2 / 3 of the chute depth. The pivot foot plate is installed on the upper edge of the wear-resistant liner on the side wall of the chute, with a horizontal inclination of 1-2° towards the material drop point.

[0007] The rotating shaft is a belt side roller, and the lower end of the rotating shaft is connected and fixed to the base plate of the rotating shaft by fixing screws.

[0008] The rotating shaft sleeve is a steel pipe with an inner diameter larger than the outer diameter of the rotating shaft. One end of the rotating shaft sleeve is a steel plate welded to a plug structure. The side wall of the rotating shaft sleeve is provided with a drilled hole near the middle position to match the set screw and fix it to the rotating shaft.

[0009] The sidewall of the chute has an elongated hole through which the rotating probe arm and the baffle plate extend into the rear half of the chute. The size of the elongated hole matches the size of the rotating probe arm and the baffle plate.

[0010] It also includes a dust curtain, which is installed on the upper part of the elongated hole in the side wall of the chute.

[0011] The rotating detection arm is located below and behind the belt drum, at a distance of 200mm from the axis of the belt drum and in a parabolic position that avoids the material drop point.

[0012] One end of the long side of the baffle is fixed to the rotating detection arm, and the other end of the long side of the baffle hangs down naturally.

[0013] It also includes two reinforcing ribs for the base plate, which are vertically distributed and installed on both sides below the base plate of the pivot.

[0014] The beneficial effects of this utility model are as follows: By applying the "lever principle", when the material slides down from the top of the material pile to the height of the baffle plate, it drives the rotating detection arm to deflect along the rotating shaft, thereby triggering the proximity switch to send an alarm and shutdown signal to the central control room in a timely manner. It can detect the blockage of the chute in a timely and accurate manner when there is a slight blockage in the chute between the upstream and downstream belts, avoiding the accident of the chute being blocked and affecting production. It eliminates the need for a small motor blockage detector, greatly improves reliability, and is economical and energy-saving. Attached Figure Description

[0015] Figure 1 This is the front view of this utility model;

[0016] Figure 2 This is a rear view of the present invention;

[0017] Figure 3 This is a side view of the pivot foot plate of this utility model;

[0018] Figure 4 This is a front view of the pivot foot plate of this utility model;

[0019] Figure 5 This is a top view of the iron pivot foot plate of this utility model;

[0020] Figure 6 This is a structural schematic diagram of the anchor reinforcement plate of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the limiting bracket of this utility model;

[0022] Figure 8 This is a physical image of the limiting bracket of this utility model;

[0023] Figure 9 This is a schematic diagram of the structure of the rotating shaft of this utility model;

[0024] Figure 10 This is a schematic diagram of the structure of the rotating shaft sleeve of this utility model;

[0025] In the diagram: 1. Shaft base plate; 2. Base reinforcing rib plate; 3. Limit bracket; 4. M12*25 bolt; 5. M12 nut; 6. Proximity switch; 7. Detector arm stop; 8. M16*70 bolt; 9. M16 nut; 10. Shaft; 11. M14 nut; 12. M14 washer; 13. Shaft sleeve; 15. Limit sensing plate; 16. Rotary detector arm; 17. Material stop plate; 18. 2-M8 through hole. Detailed Implementation

[0026] To make the purpose, technical solution, and advantages of this utility model clearer, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described implementation cases are only a small part of this utility model, not all of them. All other implementation cases obtained by those skilled in the art based on the implementation cases of this utility model without creative effort are within the protection scope of this utility model.

[0027] A chute blockage detection device includes a pivot base plate 1, a limiting bracket 3, a proximity switch 6, a detection arm stop 7, a pivot 10, a pivot sleeve 13, a limiting sensing iron plate 15, a rotating detection arm 16, and a baffle plate 17. The pivot base plate 1 is installed on one side of the chute sidewall, with its height matching the site requirements. The pivot sleeve 13 is fitted onto the pivot 10, with one end of the pivot 10 fixed to the pivot base plate 1 and the other end connected to the lower part of the rotating detection arm 16. One end of the rotating detection arm 16 extends into the rear half of the chute, and the baffle plate 17 is installed on the rotating detection arm 16. The detection arm stop 7 is installed on the pivot base plate 1, with its position matching that of the rotating detection arm 16. The proximity switch 6 is fixed to the pivot base plate 1 via the limiting bracket 3, and the limiting sensing iron plate 15 is welded to the end of the rotating detection arm 16 that does not extend into the chute, located above the proximity switch 6.

[0028] The pivot foot plate 1 is installed at 1 / 2 to 2 / 3 of the chute depth. The pivot foot plate 1 is installed at the upper edge of the wear-resistant liner on the side wall of the chute, with a horizontal inclination of 1-2° towards the material drop point.

[0029] The rotating shaft 10 is a belt side roller, and the lower end of the rotating shaft 10 is connected and fixed to the rotating shaft base plate 1 by fixing screws.

[0030] The rotating shaft sleeve 13 is a steel pipe with an inner diameter larger than the outer diameter of the rotating shaft 10. One end of the rotating shaft sleeve 13 is a steel plate welded to a plug structure. The side wall of the rotating shaft sleeve 13 is provided with a drilled hole and a set screw to match and fix it to the rotating shaft (10).

[0031] The sidewall of the chute has an elongated hole through which the rotating probe arm 16 and the baffle plate 17 extend into the rear half of the chute. The size of the elongated hole matches the size of the rotating probe arm 16 and the baffle plate 17.

[0032] It also includes a dust curtain, which is installed on the upper part of the elongated hole in the side wall of the chute.

[0033] The rotating detection arm 16 is located below and behind the belt drum, at a distance of 200mm from the axis of the belt drum and in a parabolic position that avoids the material drop point.

[0034] One end of the long side of the baffle plate 17 is fixed to the rotating probe arm 16, and the other end of the long side of the baffle plate 17 hangs down naturally.

[0035] It also includes two anchor reinforcing plates 2, which are vertically distributed and installed on both sides below the pivot anchor plate 1. Example

[0036] The pivot base plate 1 is installed on one side of the chute sidewall. Its height depends on the site requirements. In this embodiment, the position is about 1 / 2 to 2 / 3 of the chute depth. If the chute sidewall has a wear-resistant liner, it can be installed at the upper edge of the wear-resistant liner. When installing the pivot base plate 1, it is required to tilt it horizontally at an angle of 1-2° towards the material drop point. This can help eliminate unnecessary swinging of the rotating detection arm and also allow the rotating detection arm to automatically return to its original position after the blockage is cleared. The rotating detection arm 16 and the baffle plate 17 need to be inserted deep into the chute. An elongated hole needs to be made in the chute sidewall to allow the rotating detection arm and the baffle plate to extend into it. A dust cover is installed above the side hole of the chute. The rear half of the rotating detection arm 16 extends into the chute, about 200mm away from the axis of the belt roller, avoiding the parabolic position of the material drop point, that is, below and behind the belt roller.

[0037] The detection arm stop 7 is fixed to the rotating base plate 1 with M16*70 bolts 8 and M16 nuts 9, and its position can be adjusted forward and backward. A baffle plate 17 is installed on the rotating detection arm 16. The baffle plate 17 is cut from waste belts, and its length is determined according to the actual site conditions. One end of the long side of the baffle plate 17 is fixed to the rotating detection arm 16, and the other end hangs down. When a material blockage occurs, the material pile gradually rises, and the material on the top layer will spread outward from the drop point. When the material impacts the baffle plate 17, the rotating detection arm 16 will deflect to the other side, thereby driving the limit sensing iron plate 15 to trigger the proximity switch 6 to send a material blockage signal.

[0038] The rotating shaft 10 uses a small belt side roller with a fixing bolt at the bottom. It is connected to the base plate 1 of the rotating shaft by an M14 nut 11 and an M14 washer 12, which is convenient for installation and adjustment. The position can be adjusted back and forth. The roller is equipped with upper and lower sealed bearings, which makes it flexible to rotate, has a good sealing effect, and strong environmental adaptability. There is nothing else at the top, so it is very suitable for a rotating shaft with single-end fixing.

[0039] The rotating sleeve 13 is fitted onto the rotating shaft 10. The rotating sleeve 13 is made of a steel pipe with an inner diameter larger than the outer diameter of the rotating shaft 10, and one end is welded with a steel plate as a plug. On the side wall of the rotating sleeve 13, near the middle position, a 2-M8 through hole 18 is drilled and tapered as a set screw hole. Two set screws are used to fix the rotating sleeve 13 and the rotating shaft 10, so that their relative positions are stable and can allow the rotating probe arm 16 to rotate along the rotating shaft 10.

[0040] Limit bracket 3 and proximity switch 6: Limit bracket 3 is made of 2mm thick cold-rolled steel plate and machined into a "Z" shape. It has large and small sides. The large side is machined into a 30mm long notch for limit installation and adjustment. The small side is drilled with a ∅12mm hole for fixing to the pivot base plate 1 with M12*25 bolts 4 and M12 nuts 5. The position can be adjusted forward, backward, left and right. The proximity switch is an AC 220V ∅30mm proximity switch (the working voltage depends on the actual situation).

[0041] The limit sensing plate 15 is the triggering element of the proximity switch 6. It is made of 2mm thick cold-pressed plate, 60mm×40mm×2mm in size. One end is horizontally welded to the end of the rotating detection arm 16 that does not extend into the chute. It is located above the proximity switch 6 and has a 3-8mm sensing gap with the top of the proximity switch 6. When the rotating detection arm 16 rotates, the limit sensing plate 15 also rotates in the opposite direction, thereby triggering the proximity switch 6 to send a signal.

[0042] The proximity switch 6 uses IF-1 AC 220V with a sensing gap of 15-20mm. It has strong anti-interference ability, reliable operation, and wide voltage adaptability. The housing is equipped with threads and lock nuts, which facilitates the adjustment and movement of the sensing gap.

[0043] The dust curtain is made of canvas. Its function is to prevent smoke and dust from overflowing from the side holes of the chute, while not preventing the rotating probe arm from deflecting.

[0044] The pivot base plate 1 is an overall support for the rotating detection arm, pivot, proximity switch, and limit bracket. To improve its support and fixing strength, two reinforcing ribs 2 are added and vertically distributed on both sides of the bottom of the pivot base plate 1 to reinforce the support.

[0045] This invention utilizes the "lever principle." When material slides down from the top of the stockpile and reaches the height of the baffle plate, the impact of the material flow on the baffle plate causes it to drive the rotating detection arm to swing in the opposite direction of the material flow. At this time, the limit sensor plate triggers a proximity switch, sending a blockage signal to the PLC belt control system in the central control room, which in turn stops the upstream belt conveyor. This significantly improves reliability, reduces the labor intensity of production workers, and greatly shortens the time for clearing blockages in the chute from several hours to less than 60 minutes, reducing the impact on production and eliminating many safety hazards. Because the small motor that operates continuously is eliminated, the device consumes no electricity during normal use, making it more energy-efficient. It also saves on spare parts procurement and motor maintenance costs. Given the large number of belt conveyors in the plant, this also saves a considerable amount of money.

Claims

1. A chute blockage detection device, characterized in that: The system includes a pivot base plate (1), a limit bracket (3), a proximity switch (6), a detection arm stop (7), a pivot (10), a pivot sleeve (13), a limit sensing plate (15), a rotating detection arm (16), and a baffle plate (17). The pivot base plate (1) is installed on one side of the chute sidewall, and its height is matched to the site requirements. The pivot sleeve (13) is fitted onto the pivot (10). One end of the pivot (10) is fixed to the pivot base plate (1), and the other end is connected to the pivot. Below the rotating detection arm (16); one end of the rotating detection arm (16) extends into the rear half of the chute, and the baffle plate (17) is installed on the rotating detection arm (16); the detection arm stop (7) is installed on the rotating shaft foot plate (1), and its position matches that of the rotating detection arm (16); the proximity switch (6) is fixed on the rotating shaft foot plate (1) by the limit bracket (3), and the limit sensing iron plate (15) is welded to the end of the rotating detection arm (16) that does not extend into the chute, and is located above the proximity switch (6).

2. The chute blockage detection device according to claim 1, characterized in that: The pivot foot plate (1) is installed at 1 / 2 to 2 / 3 of the chute depth. The pivot foot plate (1) is installed at the upper edge of the wear-resistant liner on the side wall of the chute, with a horizontal inclination of 1-2° towards the material drop point.

3. The chute blockage detection device according to claim 1, characterized in that: The rotating shaft (10) is a belt side roller, and the lower end of the rotating shaft (10) is connected and fixed to the rotating shaft foot plate (1) by fixing screws.

4. The chute blockage detection device according to claim 1, characterized in that: The rotating shaft sleeve (13) is a steel pipe with an inner diameter larger than the outer diameter of the rotating shaft (10). One end of the rotating shaft sleeve (13) is a steel plate welded to a plug structure. The side wall of the rotating shaft sleeve (13) is provided with a drilled hole and a set screw to match and fix it to the rotating shaft (10).

5. The chute blockage detection device according to claim 1, characterized in that: The sidewall of the chute has an elongated hole through which the rotating probe arm (16) and the baffle plate (17) extend into the rear half of the chute. The size of the elongated hole matches the size of the rotating probe arm (16) and the baffle plate (17).

6. The chute blockage detection device according to claim 5, characterized in that: It also includes a dust curtain, which is installed on the upper part of the elongated hole in the side wall of the chute.

7. The chute blockage detection device according to claim 1, characterized in that: The rotating detection arm (16) is located below the rear of the belt drum, at a distance of 200mm from the axis of the belt drum and avoiding the parabolic position of the material drop point.

8. The chute blockage detection device according to claim 1, characterized in that: One end of the long side of the baffle plate (17) is fixed to the rotating probe arm (16), and the other end of the long side of the baffle plate (17) hangs down naturally.

9. The chute blockage detection device according to claim 1, characterized in that: It also includes a base reinforcement plate (2), which consists of two plates, which are vertically distributed and installed on both sides below the pivot base plate (1).

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