Alarm device with noise reduction function for material level detection and alarm device circuit

Abstract

The utility model relates to the technical field of automation control, in particular to an alarm device with noise reduction for material level detection and an alarm device circuit, which comprises a control box with an upper opening structure, a circuit board is fixed in the control box through matching of screws, a clamping groove for clamping the circuit board is arranged in the control box, and the circuit board is arranged in the clamping groove. The device comprises a control box, a circuit board is fixed to the upper end face of the control box, a switching power supply is fixed to the upper end face of the circuit board through cooperation of screws, an upper cover plate is fixed to an opening in the upper portion of the control box through screws, an alarm is fixed to the upper end face of the upper cover plate through screws, and the alarm, the switching power supply and the circuit board are communicated through wires. Alarm sound can be eliminated by pressing down the key switch, meanwhile, when the production is finished and the next production is charged, the alarm function can be automatically reset, the alarm function does not need to be manually reset, and alarm missing caused by human negligence is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to automatic control technical field especially, a kind of alarm device and alarm device circuit for material level detection with silencing. BACKGROUND

[0002] Currently, in industrial manufacturing or other fields, the height of material, liquid level and the like is usually detected by various sensors, and when the height of material, liquid level is lower than the alarm line, the sensor triggers the alarm to alarm, for example, when the resin material height in the barrel is lower than the safe dosage line during injection molding, the alarm is triggered to alarm, and when the material height is lower than the safe dosage alarm, the operator can mute by turning off the power supply of the alarm system when the remaining material can meet the production needs temporarily without adding material, and when the power supply of the alarm system is turned off, the alarm system power supply may be forgotten to be turned on due to human negligence, resulting in that the material is lower than the safe dosage during next production but does not trigger the alarm, therefore a kind of alarm device for material level detection with silencing is provided, and when alarming, the alarm sound can be eliminated by pressing the key switch, and when this production is finished and the next production is added, the alarm function is automatically reset, without manually resetting the alarm function, to avoid the missing alarm caused by human negligence. SUMMARY

[0003] The utility model aims at solving the problem that the power supply of the alarm system is turned off in the prior art, the alarm system power supply may be forgotten to be turned on due to human negligence, resulting in that the material is lower than the safe dosage during next production but does not trigger the alarm, and proposes a kind of alarm device for material level detection with silencing and alarm device circuit.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] An alarm device for material level detection with silencing is designed, which comprises a control box with an upper opening structure, a circuit board is fixed in the control box by screw cooperation, a clamping groove for clamping the circuit board is formed in the control box, a switch power supply is fixed on the upper end face of the circuit board by screw cooperation, an upper cover plate is fixed on the upper opening of the control box by screw, an alarm is fixed on the upper end face of the upper cover plate by screw, and the alarm, the switch power supply and the circuit board are connected by wires.

[0006] Preferably, a sensor connection plug is welded and fixed in the circuit board, a jack is formed on the outer side end face of the control box and matched with the sensor connection plug, and an external sensor is connected with the sensor connection plug through the jack.

[0007] Preferably, one side end face of the control box is provided with a key fixing groove, a key switch matched with the switching power supply is movably inserted into the key fixing groove, the insertion part of the key switch is provided with a thread, and the key switch is fixedly connected with the control box through cooperation of the fixing nut.

[0008] Preferably, the other side end face of the control box is movably inserted with a power line, and the power line is in electrical connection with the switching power supply.

[0009] Preferably, fixing columns are arranged at four corners of the control box, and the upper cover plate is fixedly connected through cooperation of the fixing columns and screws.

[0010] An alarm device circuit for material level detection with noise elimination is designed, which comprises a circuit board 4, a key switch SB1, an alarm BL1 and three groups of relays, the relay KA1 is provided with at least one group of normally open switches, the coil of the relay KA1 is connected with a material level detection sensor, the coil is electrified when the material level detection sensor detects that the material level is low, the relay KA2 is provided with at least one group of normally open switches, the relay KA3 is provided with at least one group of normally open switches and one group of normally closed switches, the key switch SB1 is a normally open self-resetting button switch, and the normally open switch of the relay KA2 is connected with the alarm BL1 in series and then connected to a high potential end and a low potential end respectively.

[0011] Preferably, one end of the normally open switch of the relay KA1 is connected to a high potential end, the other end of the normally open switch of the relay KA1 is connected in two ways, one way is to connect the coil of the relay KA2 and then connect the normally closed switch of the relay KA3 in series and then connect to a low potential end, and the other way is to connect the key switch SB1 and then connect the coil of the relay KA3 in series and then connect to a low potential end, and the normally open switch of the relay KA3 is connected in parallel across the key switch SB1.

[0012] The alarm device for material level detection with noise elimination and the alarm device circuit have the beneficial effects that:

[0013] 1. When the material level is high, the switch of the relay KA1 connected with the material level detection sensor is disconnected, the normally closed switch of the relay KA3 is closed, the normally open switch of the relay KA3 is opened, the normally open switch of the relay KA2 is disconnected, and the alarm BL1 is not connected, so that no alarm is given.

[0014] 2. When the material level is low, the normally open switch of the relay KA1 connected with the material level detection sensor is closed, the coil of the relay KA2 is electrified, the normally open switch of the relay KA2 is closed, and the alarm BL1 is connected to give an alarm.

[0015] 3. After pressing the button switch SB1, the coil of relay KA3 is energized, the normally open switch of relay KA3 is closed, the normally closed switch of relay KA3 is opened, the coil of relay KA2 is de-energized, the normally open switch of relay KA2 is opened, the alarm BL1 is not connected, and no alarm is triggered.

[0016] 4. After feeding, when the material level is high, the normally open switch of relay KA1 connected to the material level sensor is open, the normally closed switch of relay KA3 is closed, the normally open switch of relay KA3 is open, the normally open switch of relay KA2 is open, the alarm BL1 is not connected and does not alarm, and the switch state returns to the initial switch state.

[0017] When a material shortage alarm is triggered, the alarm sound can be silenced by pressing the button switch. Furthermore, the alarm function will automatically reset after the current production run ends and material is added for the next production run, eliminating the need for manual reset and preventing missed alarms due to human error. This improves production efficiency and quality. The device features a compact structure, small size, and minimal space requirements, making it easy to place. The power supply is optional, allowing for direct AC 220V power supply or low-voltage DC power supply, making it convenient to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a silencing alarm device for material level detection proposed in this utility model;

[0019] Figure 2 This is an exploded structural diagram of an alarm device with silencer for material level detection proposed in this utility model;

[0020] Figure 3 The circuit diagram of a silencing alarm device for material level detection proposed in this utility model;

[0021] Figure 4 The circuit diagram of the alarm device with silencer for material level detection proposed in this utility model shows the switch status during alarm.

[0022] Figure 5 The circuit diagram of the alarm device circuit for material level detection with silencer proposed in this utility model shows the switch status after the button switch is pressed.

[0023] Figure 6 The circuit connection diagram for a silencing alarm device for material level detection proposed in this utility model is shown in the power supply state diagram.

[0024] In the diagram: 1. Alarm; 2. Top cover; 3. Switching power supply; 4. Circuit board; 5. Power cord; 6. Control box; 601. Slot; 602. Fixing post; 603. Button fixing slot; 7. Fixing nut; 8. Washer; 9. Button switch; 10. Normally open switch; 11. Normally closed switch.

[0025] KA1, relay; KA2, relay; KA3, relay; BL1, alarm; SB1, key switch. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0027] With reference to Figures 1-2 , a kind of alarm device for material level detection belt silencing, including the control box 6 with upper opening structure, the inside of control box 6 is fixed with circuit board 4 by the cooperation of screw, the inside of control box 6 is equipped with the clamping groove 601 of clamping circuit board 4, the upper end surface of circuit board 4 is fixed with switch power supply 3 by the cooperation of screw, the upper opening of control box 6 is fixed with upper cover plate 2 by screw, the upper end surface of upper cover plate 2 is fixed with alarm 1 by screw, alarm 1, switch power supply 3 and circuit board 4 are communicated by wire, the device structure is compact, appearance is small, and the space occupied is small, it is convenient to place, and power supply can be selected simultaneously, it can be directly powered by commercial alternating current 220V, and it can be low-voltage direct current power supply, convenient to use.

[0028] In order to facilitate the connection of material level sensor, the sensor connection plug is welded and fixed in the inside of circuit board 4 for detecting the remaining amount of the device, the outside end face of control box 6 is provided with a jack matched with the sensor connection plug, and the external sensor is connected to the sensor connection plug through the jack.

[0029] With reference to Figure 2 , in order to install key switch 9, key fixing groove 603 is provided on one side end face of control box 6, key switch 9 matched with switch power supply 3 is movably inserted into the inside of key fixing groove 603, the inserted part of key switch 9 is provided with a thread, key switch 9 is fixedly connected with control box 6 through the cooperation of fixing nut 7, and a gasket 8 is arranged at the connection position of key switch 9 and fixing nut 7, so that switch power supply 3 can be conveniently controlled through key switch 9, and the key switch 9 is easy to disassemble and install.

[0030] With reference to Figure 2 , in order to facilitate the power supply of switch power supply 3, power cord 5 is movably inserted into the other side end face of control box 6, and power cord 5 is in electrical connection with switch power supply 3.

[0031] With reference to Figure 2 , in order to facilitate the fixation of upper cover plate 2, fixing column 602 is arranged at the four corners of control box 6, and upper cover plate 2 is fixedly connected through the cooperation of fixing column 602 and screw.

[0032] With reference toFigures 3-6 A kind of alarm device circuit for silencing of material level detection belt, including circuit board 4, button switch SB1, alarm BL1 and three groups of relays, relay KA1 is provided with at least one group of normally open switch 10, the coil of relay KA1 is connected with material level detection sensor, coil is energized when material level detection sensor detects low material level, relay KA2 is provided with at least one group of normally open switch 10, relay KA3 is provided with at least one group of normally open switch 10 and one group of normally closed switch 11, button switch SB1 is set as normally open self-resetting button switch, the normally open switch 10 of relay KA2 is connected in series with alarm BL1 after respectively accessing high potential end and low potential end.

[0033] Refer to Figures 3-6 One end of the normally open switch 10 of relay KA1 is connected to the high potential end, and the other end of the normally open switch 10 of relay KA1 is connected in two ways, one way is to connect the coil of relay KA2 and then connect to the low potential end in series with the normally closed switch 11 of relay KA3, and the other way is to connect the button switch SB1 and then connect to the low potential end in series with the coil of relay KA3, and the normally open switch 10 of relay KA3 is connected in parallel across the button switch SB1, when the device alarms for lack of material, the alarm sound can be eliminated by pressing the button switch SB1, and at the same time, when the production is over and the next production is started, the alarm function will be automatically reset, without the need for manual reset of the alarm function, avoiding missed alarms due to human negligence and improving production efficiency and production quality.

[0034] Refer to Figure 3 When the material level is high, the switch of relay KA1 connected to the material level detection sensor is turned off, the normally closed switch 11 of relay KA3 is closed, the normally open switch 10 of relay KA3 is opened, the normally open switch 10 of relay KA2 is turned off, and the alarm BL1 is not connected, so there is no alarm;

[0035] Refer to Figure 4 When the material level is low, the normally open switch 10 of relay KA1 connected to the material level detection sensor is closed, the coil of relay KA2 is energized, the normally open switch 10 of relay KA2 is closed, and the alarm BL1 is connected, so there is an alarm;

[0036] Refer to Figure 5 When the button switch SB1 is pressed, the coil of relay KA3 is energized, the normally open switch 10 of relay KA3 is closed, the normally closed switch 11 of relay KA3 is opened, the coil of relay KA2 is de-energized, the normally open switch 10 of relay KA2 is opened, and the alarm BL1 is not connected, so there is no alarm;

[0037] Refer to Figure 3When the material level is high, the relay KA1 switch connected with the material level sensor is opened, the relay KA3 switch is closed, the relay KA3 switch is opened, the relay KA2 switch is opened, and the alarm BL1 is not connected, and no alarm is given.

[0038] When the material level is high, the relay KA1 switch connected with the material level sensor is opened, the relay KA3 switch is closed, the relay KA3 switch is opened, the relay KA2 switch is opened, and the alarm BL1 is not connected, and no alarm is given.

[0039] When the material level is high, the relay KA1 switch connected with the material level sensor is opened, the relay KA3 switch is closed, the relay KA3 switch is opened, the relay KA2 switch is opened, and the alarm BL1 is not connected, and no alarm is given.

[0040] When the material level is high, the relay KA1 switch connected with the material level sensor is opened, the relay KA3 switch is closed, the relay KA3 switch is opened, the relay KA2 switch is opened, and the alarm BL1 is not connected, and no alarm is given.

[0041] When the material level is high, the relay KA1 switch connected with the material level sensor is opened, the relay KA3 switch is closed, the relay KA3 switch is opened, the relay KA2 switch is opened, and the alarm BL1 is not connected, and no alarm is given.

[0042] When the material level is high, the relay KA1 switch connected with the material level sensor is opened, the relay KA3 switch is closed, the relay KA3 switch is opened, the relay KA2 switch is opened, and the alarm BL1 is not connected, and no alarm is given.

[0043] When the material level is high, the relay KA1 switch connected with the material level sensor is opened, the relay KA3 switch is closed, the relay KA3 switch is opened, the relay KA2 switch is opened, and the alarm BL1 is not connected, and no alarm is given.

[0044] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An alarm device for detecting the level of a belt with sound attenuation, comprising a control box (6) with an open structure on top, characterized in that: The inside of the control box (6) is fixed with a circuit board (4) by screw cooperation, the inside of the control box (6) is provided with a clamping groove (601) for clamping the circuit board (4), the upper end surface of the circuit board (4) is fixed with a switching power supply (3) by screw cooperation, the upper opening of the control box (6) is fixed with an upper cover plate (2) by screw, the upper end surface of the upper cover plate (2) is fixed with an alarm (1) by screw, the alarm (1), the switching power supply (3) and the circuit board (4) are in wire communication.

2. A level detection belt silencing alarm device according to claim 1, characterized in that: The inside of the circuit board (4) is welded with a sensor connecting plug, the outside end surface of the control box (6) is provided with a jack matched with the sensor connecting plug, and an external sensor is connected with the sensor connecting plug through the jack.

3. A level detection belt silencing alarm device according to claim 2, characterized in that: The side end surface of the control box (6) is provided with a key fixing groove (603), the inside of the key fixing groove (603) movably inserts a key switch (9) matched with the switching power supply (3), the inserted part of the key switch (9) is provided with a thread, the key switch (9) is fixedly connected with the control box (6) through the cooperation of a fixing nut (7), and the connection between the key switch (9) and the fixing nut (7) is provided with a gasket (8).

4. A level detection belt silencing alarm device according to claim 3, wherein: The other side end surface of the control box (6) movably inserts a power line (5), and the power line (5) is in electrical communication with the switching power supply (3).

5. A device for detecting the level of a belt and silencing the alarm according to claim 1, characterized in that: The four corners of the control box (6) are provided with fixing columns (602), and the upper cover plate (2) is fixedly connected through the cooperation of the fixing columns (602) and screws.

6. A circuit for silencing the alarm of a level detection tape as claimed in any one of claims 1 to 5, characterized in that: The circuit board (4), a key switch SB1, an alarm BL1 and three groups of relays are included, at least one group of normally open switches (10) are arranged on the relay KA1, the coil of the relay KA1 is connected with a material level detection sensor, the coil is electrified when the material level detection sensor detects that the material level is low, at least one group of normally open switches (10) are arranged on the relay KA2, at least one group of normally open switches (10) and one group of normally closed switches (11) are arranged on the relay KA3, the key switch SB1 is arranged as a normally open self-resetting button switch, and the normally open switch (10) of the relay KA2 is connected with the alarm BL1 in series and then connected to a high potential end and a low potential end respectively.

7. A circuit according to claim 6, characterised in that: One end of the normally open switch (10) of the relay KA1 is connected to a high potential end, the other end of the normally open switch (10) of the relay KA1 is connected in two ways, one way is to connect the coil of the relay KA2 and then connect to a low potential end in series with the normally closed switch (11) of the relay KA3, and the other way is to connect the key switch SB1 and then connect to a low potential end in series with the coil of the relay KA3, and the normally open switch (10) of the relay KA3 is connected in parallel across the key switch SB1.

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