A material breakage warning system for a fluidized bed furnace feed belt

Abstract

The utility model discloses a kind of material breakage warning system of fluidized bed furnace feeding belt, including power supply unit adopts alternating current 220V power supply;Control module adopts fuse (FU) in series connection successively, material breakage detection switch (S1), full material detection switch (S2) and relay coil (K), the both ends of the control loop are connected with the fire line and zero line of the power supply unit respectively, the utility model is through the series interlocking of material breakage detection switch and full material detection switch, only in "material breakage and non-full material" trigger alarm, thoroughly eliminate full material false report, local no material false report situation;Without PLC or amplification module, only through basic electrical component to realize function, adapt to fluidized bed furnace high temperature, dust environment, failure rate reduces;And fuse carries out overcurrent protection to control loop, relay realizes the electrical isolation of control loop and alarm loop, avoid switch direct load burning, improve circuit safety.

Description

Technical Field

[0001] This utility model relates to the field of feed belt breakage alarm technology, specifically to a feed belt breakage warning system for a fluidized bed furnace. Background Technology

[0002] Fluidized bed furnaces are key equipment used in industrial production for roasting and drying materials. Their feeding process relies on a belt conveyor for continuous material supply. If the feeding belt breaks down (e.g., due to blockage of the hopper or belt jamming), the material inside the fluidized bed furnace will burn dry, causing the equipment to overheat and be damaged or production to be interrupted. If the belt is full (e.g., due to blockage of the discharge port), it may cause material to overflow, the belt to overload and break, posing a safety hazard.

[0003] In existing technologies, the material breakage monitoring of the feed belt of a fluidized bed furnace often adopts a "single switch trigger" circuit scheme (such as photoelectric sensor or normally open limit switch directly triggering alarm). This is prone to the occurrence of partial material breakage (not complete material breakage) due to material flow fluctuations, or the material pile blocking the sensor when the belt is full, which can easily trigger false alarms and cause unnecessary shutdowns. Furthermore, the existing circuit does not take into account the "full material" state. If the material breakage switch is accidentally closed when the belt is full, it will still trigger an alarm, which contradicts the actual operating conditions. Utility Model Content

[0004] Therefore, this utility model provides a material breakage warning system for the feed belt of a fluidized bed furnace to overcome the problems of the prior art.

[0005] This utility model is implemented by the following technical solution: A material shortage warning system for a fluidized bed furnace feed belt includes a power supply unit using a 220V AC power supply; a control module consisting of a fuse (FU), a material shortage detection switch (S1), a full material detection switch (S2), and a relay coil (K) connected in series, with both ends of the control module connected to the live wire and neutral wire of the power supply unit, respectively; an alarm module consisting of a normally open contact (K1) of a relay, an alarm light (HL), and a buzzer (HA) connected in series, with both ends of the alarm module connected to the live wire and neutral wire of the power supply unit, respectively; the material shortage detection switch (S1) is a normally open switch, closing when the feed belt is short of material; the full material detection switch (S2) is a normally closed switch, opening when the feed belt is full; the relay coil (K) and the normally open contact (K1) of the relay are linked components of the same relay, closing synchronously when the relay coil (K) is energized.

[0006] Preferably, the material breakage detection switch (S1) and the full material detection switch (S2) are mechanical limit switches and can be installed on the upper bracket of the feed belt. The material breakage detection switch (S1) corresponds to the "material breakage detection position" of the belt, and the full material detection switch (S2) corresponds to the "full material detection position" of the belt.

[0007] Preferably, the alarm light (HL) is a red LED light, the buzzer (HA) is an industrial-grade buzzer, and the alarm light (HL) and the buzzer (HA) are connected in series.

[0008] Preferably, the rated current of the fuse (FU) is 5A.

[0009] Preferably, the power supply unit can be replaced with a DC power supply to adapt to DC power supply scenarios.

[0010] The advantages of this invention are: by interlocking the material shortage detection switch and the full material detection switch in series, the alarm is triggered only when the material is "out of material and not full", completely eliminating false alarms of full material and partial material shortage; no PLC or amplification module is required, and the function is realized only through basic electrical components, which is suitable for the high temperature and dust environment of the fluidized bed furnace, thus reducing the failure rate; in addition, the fuse provides overcurrent protection for the control circuit, and the relay realizes electrical isolation between the control circuit and the alarm circuit, preventing the switch from burning out under load and improving circuit safety. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the control block structure described in this utility model; Figure 2 This is a schematic diagram of the circuit described in this utility model.

[0013] In the diagram: Power supply unit 1, control module 2, alarm module 3. Detailed Implementation

[0014] 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.

[0015] like Figure 1 , Figure 2 As shown, a material breakage warning system for a fluidized bed furnace feed belt; Example 1: Component Selection and Installation Power supply unit 1: Uses the existing AC220V power supply in the factory workshop, connected to the circuit through an air switch; Fuse (FU): Select an RT18-32 type fuse with a rated current of 5A, and connect it in series with the live wire of the control circuit to prevent short circuit. Material shortage detection switch (S1): Select LX19-001 normally open limit switch, installed 10cm above the feed belt (corresponding to the "material shortage detection position"); when there is no material on the belt, the switch contact rod resets and closes; when there is material on the belt, the material pushes the contact rod to open the switch; Full material detection switch (S2): Select LX19-111 type normally closed limit switch, installed 30cm above the feed belt (corresponding to "full material detection position"); when the belt is full, the material pile squeezes the contact rod to open the switch; when the belt is not full, the contact rod resets to close the switch. Relay: Select HH52P type AC220V relay, its coil (K) is connected to the control circuit, and the normally open contact (K1) of the normally open relay is connected to the alarm circuit. Alarm light (HL) and buzzer (HA): The alarm light is an AD16-22D type red LED light (working voltage AC220V), and the buzzer is a TB-12 type industrial grade buzzer (working voltage AC220V, sound pressure ≥90dB). The two are connected in series to the alarm circuit.

[0016] Example 2: Circuit Operation Process Normal feeding conditions (neither material interruption nor full material supply) Switch status: Belt has material → Material breakage detection switch (S1) (normally open) is open; Belt is not full → Full material detection switch (S2) (normally closed) is closed; Control circuit: Because S1 is open, there is no current in the control circuit → relay coil K is not energized; Alarm circuit: Relay coil K is not energized → the normally open contact (K1) of the normally open relay remains open → the alarm light HL does not light up, the buzzer HA does not sound, and there is no warning.

[0017] Material shortage condition (no material on the conveyor belt) Switch status: No material on the belt → Material breakage detection switch (S1) (normally open) closed; No material on the belt → Full material detection switch (S2) (normally closed) closed; Control circuit: S1 closed and S2 closed → control circuit is connected (AC220V live wire → FU → S1 → S2 → K → neutral wire) → relay coil K is energized (generating magnetic force); Alarm circuit: Relay coil K is energized → normally open contact (K1) of normally open relay is energized → alarm circuit is connected (AC220V live wire → K1 → HL → HA → neutral wire) → alarm light HL lights up and buzzer HA sounds, realizing material shortage warning.

[0018] Full material condition (conveyor belt fully loaded) Switch status: When the belt is full, the material breakage detection switch (S1) (normally open) is off; when the belt is full, the full material detection switch (S2) (normally closed) is off. Control circuit: Because S2 is open, there is no current in the control circuit → relay coil K is not energized; Alarm circuit: The normally open contact (K1) of the normally open relay remains open → the alarm light HL does not light up and the buzzer HA does not sound, to avoid false alarms due to full material.

[0019] Example 3: Adaptive Modification If the factory uses a DC24V low-voltage power supply system, the "power supply unit" can be replaced with a DC24V power supply, the relay can be replaced with an HH52P DC24V relay, the alarm light HL and the buzzer HA can be replaced with DC24V compatible models, and the remaining components and circuit logic can remain unchanged. This system is suitable for explosion-proof and other low-voltage scenarios.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 material breakage warning system for a fluidized bed furnace feed belt, characterized in that, include: The power supply unit (1) uses AC 220V power; The control module (2) is equipped with a fuse (FU), a material breakage detection switch (S1), a material full detection switch (S2) and a relay coil (K) connected in series. The two ends of the control module (2) are connected to the live wire and the neutral wire of the power supply unit (1) respectively. The alarm module (3) uses a normally open contact (K1) of a relay connected in series, an alarm light (HL) and a buzzer (HA). The two ends of the alarm module (3) are connected to the live wire and the neutral wire of the power supply unit (1) respectively. The material breakage detection switch (S1) is a normally open switch. When the feed belt breaks, the material breakage detection switch (S1) closes. The material full detection switch (S2) is a normally closed switch. When the feed belt is full, the material full detection switch (S2) opens. The relay coil (K) and the normally open contact (K1) of the relay are linked components of the same relay. When the relay coil (K) is energized, the normally open contact (K1) of the relay closes synchronously.

2. The material breakage warning system for the feed belt of the fluidized bed furnace according to claim 1, characterized in that, The material breakage detection switch (S1) and the full material detection switch (S2) are mechanical limit switches and can be installed on the upper bracket of the feed belt. The material breakage detection switch (S1) corresponds to the "no material detection position" of the belt, and the full material detection switch (S2) corresponds to the "full material detection position" of the belt.

3. The material breakage warning system for the feed belt of the fluidized bed furnace according to claim 1, characterized in that, The alarm light (HL) is a red LED light, and the buzzer (HA) is an industrial-grade buzzer, and the alarm light (HL) and the buzzer (HA) are connected in series.

4. The material breakage warning system for the feed belt of the fluidized bed furnace according to claim 1, characterized in that, The rated current of the fuse (FU) is 5A.

5. The material breakage warning system for the feed belt of the fluidized bed furnace according to claim 1, characterized in that, The power supply unit (1) can be replaced with a DC power supply to adapt to DC power supply scenarios.

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