Anti-twisting paddle mixer device

Abstract

The utility model discloses an anti-twisting paddle mixer device which comprises a paddle mixer body, a direct-current generator, an electromagnetic brake disc, a sleeve shell, a detection circuit and a trigger control circuit, a brake disc is installed at the upper end of a motor spindle, an electromagnetic brake disc is installed outside the upper end of a shell of the motor, a rubber wheel is installed on a rotating shaft of the generator, and a shell of the generator is installed at the lower end of the shell of the motor. The detection circuit and the trigger control circuit are installed in the element box and are electrically connected. The rotating speed of the main shaft can be monitored in real time, and when the main shaft or the stirring blades are twisted due to winding of foreign matters, the probability of motor damage is reduced; the trigger control circuit can turn off the power supply of the motor as short as possible, the electromagnetic brake mechanism can brake the rotating shaft of the motor at the first time, and the alarm can sound to prompt a worker to clear away entanglements, so that the probability of motor damage caused by the fact that the main shaft of the motor and the stirring blades are wound and twisted is reduced as far as possible. On the basis, the device has a good application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring equipment, in particular to a paddle mixer device for preventing strangulation. Background Technique

[0002] The paddle mixer is a multi-functional device integrating stirring, dispersion and mixing. This kind of mixer is widely used in the mixing, reaction, dispersion, dissolution, homogenization, emulsification and other process of liquid-liquid, solid-liquid materials in the industries of electronics, chemical industry, food, pharmaceutical, building materials, pesticides, etc., such as electronic electrode paste, adhesives, mold rubber, silicone sealant, polyurethane sealant, anaerobic adhesive, paint, ink, pigment, cosmetics, ointment, etc. The paddle mixer (fixedly installed in the working area, and the small-power paddle mixer can also be operated by hand by the staff) usually consists of a motor (or motor reduction mechanism), a main shaft, stirring blades (paddle plates), etc. When the motor (or motor reduction mechanism) is powered on, the main shaft drives the paddle plates to rotate, so as to realize the stirring of liquid or solid-liquid mixture.

[0003] Although the existing paddle mixers meet the production needs to a certain extent, due to structural limitations, there are also some technical problems. Specifically, when foreign objects in the water entangle the main shaft or the stirring blades (that is, the main shaft is strangled), the load on the motor caused by the main shaft is too large, which will cause the motor to be damaged due to excessive load. Since the existing paddle mixers cannot turn off the power supply of the motor in time when the load is too large and prompt the relevant management personnel, the probability of motor damage is increased, and it is not conducive to the staff to clear the entangled foreign objects in time to resume normal production, so it will affect the production work efficiency. Therefore, it is very necessary to provide a paddle mixer device that not only has a stirring function, but also can automatically turn off the power supply of the motor when the rotation of the main shaft is abnormal, and prompt the relevant management personnel, so as to prevent the main shaft from being strangled and causing the motor to be damaged. Summary of the Utility Model

[0004] In order to overcome the disadvantages of the existing paddle mixer equipment due to structural limitations as described in the background, the utility model provides a paddle mixer device for preventing strangulation based on the paddle mixer body. During application, it can monitor the rotation speed of the main shaft in real time. When there is a risk of strangulation of the main shaft or the stirring blades due to foreign object entanglement, which may cause damage to the motor, it can turn off the power supply of the motor within the shortest possible time, and enable the electromagnetic brake mechanism to brake the main shaft of the motor immediately (the situation of foreign object entanglement will be more serious if the main shaft continues to rotate), and at the same time, it can also make an alarm sound to prompt the staff to clear the entangled objects, thereby reducing as much as possible the damage to the motor caused by the strangulation of the main shaft and the stirring blades of the motor.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A paddle mixer device for preventing strangulation, comprising a paddle mixer body, a DC generator, an electromagnetic brake disc, and a housing. It is characterized in that it also has a detection circuit and a trigger control circuit; a brake disc is installed on the outer side of the upper end of the motor spindle of the paddle mixer body, the electromagnetic brake disc is installed on the outer side of the upper end of the motor housing, and a protective housing is installed on the outer side of the upper end of the motor housing; a rubber wheel is installed on the rotating shaft of the DC generator, and the DC generator is installed at the lower end of the motor housing; a bearing is installed at the lower end of the housing, the main shaft is sleeved in the inner ring of the bearing, and the upper end of the housing is installed at the lower end of the motor housing; the detection circuit and the trigger control circuit are installed in the component box, the signal output end of the generator is electrically connected to the signal input end of the detection circuit, and the power output end of the trigger control circuit is electrically connected to the power input ends of the electromagnetic brake disc and the paddle mixer body; the signal output end of the detection circuit is electrically connected to the signal input end of the trigger control circuit.

[0007] Further, the side end of the rubber wheel is in rotational contact with the side end of the main shaft, and the outer diameter of the rubber wheel is larger than the outer diameter of the generator housing.

[0008] Further, the brake pads of the electromagnetic brake disc are located on the outer side end of the brake disc, and there is a distance between the two.

[0009] Further, the detection circuit includes an adjustable resistor, a resistor, and a triode that are electrically connected. One end of the first resistor is connected to one end of the adjustable resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the triode. The collector of the triode is connected to one end of the third resistor, and the emitter of the triode is connected to the other end of the first resistor.

[0010] Further, the trigger control circuit includes a triode, a resistor, a thyristor, an alarm, a relay, and a power switch that are electrically connected. One end of the power switch is connected to the emitter of the first triode. The collector of the second triode is connected to the base of the first triode. The collector of the first triode is connected to one end of the first resistor. The other end of the first resistor is connected to the control electrode of the thyristor. The cathode of the thyristor is connected to the positive power input end of the relay and the positive power input end of the alarm. The negative power input end of the alarm is connected to the negative power input end of the relay and the emitter of the second triode.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: Based on the paddle mixer body, during application, the generator and the detection circuit can monitor the rotation speed of the rotating shaft (main shaft) in real time. When there is a risk that the main shaft or the mixing blades are strangled due to foreign objects being entangled, which may cause damage to the motor, the trigger control circuit can cut off the power supply of the motor within the shortest possible time and enable the electromagnetic brake mechanism to brake the rotating shaft of the motor immediately (if the main shaft continues to rotate, the situation of foreign objects being entangled will be more serious). At the same time, it can also sound an alarm to prompt the staff to remove the entangled objects, thereby reducing the probability of motor damage caused by the main shaft of the motor and the mixing blades being strangled and entangled as much as possible. Based on the above, the present utility model has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0014] Figure 2 It is a circuit diagram of the present utility model. SPECIFIC EMBODIMENTS

[0015] Figure 1 、 2 As shown in 2 , a paddle mixer device for preventing strangulation includes a paddle mixer body M1, a power supply module W1, a storage battery G1, a small DC generator M, an electromagnetic brake disc DC, and a housing 1. It also has a detection circuit 2 and a trigger control circuit 3. The upper and lower ends of the motor main shaft of the paddle mixer body M1 are respectively located outside the upper and lower ends of the motor housing of the paddle mixer body. A ring-shaped brake disc 4 is welded to the outside of the upper end of the main shaft. The electromagnetic brake disc DC is installed outside the upper end of the motor housing through bolts. A protective housing 5 is installed outside the upper end of the motor housing through bolts (the protective housing 5 prevents external foreign objects from entering the electromagnetic brake disc DC). A rubber wheel 6 is tightly sleeved on the rotating shaft of the DC generator. The housing of the DC generator M is vertically installed at the lower right end of the motor housing of the paddle mixer body M1. There is an opening in the middle of the lower end of the housing 1, and a bearing 7 is tightly sleeved in the opening. The main shaft is sleeved in the inner ring of the bearing 7. The upper end of the housing 1 is installed on the lower end of the motor housing through bolts (which plays a protective role for the generator M). The power supply module W1, the storage battery G1, the detection circuit 2, and the trigger control circuit 3 are installed in the component box 8 welded to the upper end outside the protective housing.

[0016] Figure 1 、 2As shown, the left end of the rubber wheel 6 is in rotational contact with the upper right end of the lower part of the main shaft, and the outer diameter of the rubber wheel 6 is larger than the outer diameter of the housing of the generator M. The brake pads of the electromagnetic brake disc DC are located at the outer end of the brake disc, and there is a certain distance between the two. The detection circuit includes a variable resistor RP1, resistors R1 and R2, and a triode Q1 connected by circuit board wiring. One end of the first resistor R1, one end of the variable resistor RP1, and one end of the second resistor R2 are connected. The other end of the second resistor R2 is connected to the base of the triode Q1. The collector of the triode Q1 is connected to one end of the third resistor R3, and the emitter of the triode Q1 is connected to the other end of the first resistor R1. The trigger control circuit includes triodes Q2 and Q3, a resistor R4, a thyristor VS, an alarm B, a relay K2, and a power switch S2 (the handle is outside the opening at the upper end of the component box) connected by circuit board wiring. One end of the power switch S2 is connected to the emitter of the first triode Q3. The collector of the second triode Q2 is connected to the base of the first triode Q3. The collector of the first triode Q3 is connected to one end of the resistor R4. The other end of the resistor R4 is connected to the control electrode of the thyristor VS. The cathode of the thyristor VS is connected to the positive power input terminal of the relay K2 and the positive power input terminal of the alarm B. The negative power input terminal of the alarm B is connected to the negative power input terminal of the relay K2 and the emitter of the second triode Q2. The power input terminals 1 and 2 of the power module W1, the two control power input terminals of the relay K2 in the trigger control circuit, and the two poles of the AC 220V power supply are respectively connected by wires. The power output terminal of the generator M and the signal input terminal of the detection circuit, the other end of the variable resistor RP1 and the other end of the resistor R1 are connected by wires. The power output terminal of the trigger control circuit, the two normally closed contact terminals of the relay K2, and the power input ends of the electromagnetic brake disc DC and the paddle mixer body M1 are respectively connected by wires. The signal output terminal of the detection circuit, the collector of the triode Q1, and the signal input terminal of the trigger control circuit, the base of the triode Q2, are connected by wires. The power input terminals 3 and 4 of the power module W1, the two poles of the storage battery G1, the power input terminal of the detection circuit, the other end of the resistor R1, the power input terminal of the trigger control circuit, the emitter of the triode Q3, and the negative power input terminal of the alarm B are respectively connected by wires.

[0017] Figure 1 , 2As shown in the figure, this new type is based on the paddle mixer body M1, which has all the functions of an ordinary paddle mixer. It is fixedly installed in the relevant working area through the fixed disks 9 at the upper ends on both sides of the equipment (a small-power paddle mixer can also be operated by hand by the operator). When the motor of the paddle mixer body M1 is powered on, the main shaft drives the paddle 10 to rotate, thereby realizing the stirring of the liquid or solid-liquid mixture by the paddle 10 (before turning on the power switch of the motor of this new type, first turn off the power switch S2, and then turn on the power switch S2 after the motor works normally, to prevent the main shaft speed from being too low at the moment when the motor is powered on in the initial state, resulting in too low output voltage of the generator M, and then the relay K2 is energized and the control power input terminal and the normally closed contact terminal are opened, and the paddle mixer body M1 cannot work normally). After the AC 220V power supply enters the power input terminal of the power module W1, the power module W1 outputs a DC 12V power supply to the power input terminals of the storage battery G1 (the storage battery G1 is charged so that the subsequent circuit can still be powered on when the subsequent power module W1 is powered off), the detection circuit, and the trigger control circuit. After the paddle mixer body M1 is powered on and works, the main shaft drives the rubber wheel 6 to rotate, and the rubber wheel drives the rotating shaft of the generator M to rotate. The generator M outputs a DC power supply of about 6V and enters the other end of the adjustable resistor RP1 and the resistor R1 (after the 220V main power switch is turned on, the 220V power supply enters the power input terminals of the paddle mixer body M1 and the electromagnetic brake disc DC through the control power input terminal and the normally closed contact terminal of the relay K2. The paddle mixer body M1 and the electromagnetic brake disc DC are powered on and work. The inner side of the brake pad of the electromagnetic brake disc DC and the outer side end of the brake disc have an interval distance, and the paddle mixer body M1 works normally. When the paddle mixer body M1 works normally and there is no chance of jamming due to foreign objects winding around the main shaft or the stirring blades (the main shaft speed is relatively high and the voltage generated by the generator M is relatively high), the power supply voltage output by the generator M is relatively high. The power supply is divided by the adjustable resistor RP1 and the resistor R1, and the resistor R2 reduces the voltage and limits the current and enters the base of the triode Q1 higher than 0.7V. The triode Q1 conducts and the collector outputs a low level and enters the base of the triode Q2. The base of the triode Q2 has no suitable forward bias voltage and is cut off. The triode Q3 will not conduct. Then the thyristor VS will not be triggered and conducted, the relay K2 will not be energized and attracted, and the paddle mixer body M1 will continue to be powered on and work.When the paddle mixer body M1 is not working properly, the main shaft or the mixing blades are strangled or not completely strangled due to foreign matter, the main shaft speed is relatively low or does not rotate, including the motor itself fails and does not rotate, the power supply voltage output by the generator M is relatively low, the power supply is divided by the adjustable resistor RP1 and the resistor R1, the resistor R2 reduces the voltage and limits the current to enter the base of the transistor Q1 below 0.7V, the transistor Q1 is cut off, the collector no longer outputs a low level and enters the base of the transistor Q2, and the base of the transistor Q2 obtains a suitable forward bias voltage through the resistor R3 to reduce the voltage and limit the current. The collector of transistor Q3 is turned on and outputs a low level, which enters the base of transistor Q3. The collector of transistor Q3 is turned on and outputs a high level, which triggers the thyristor VS to turn on through the resistor R4 to reduce the voltage and limit the current (at the same time, the alarm B is energized and sounds). Furthermore, relay K2 is energized and closes its control power input terminal and the normally closed contact terminal to open the circuit. In this way, the paddle mixer body M1 and the electromagnetic brake disc DC lose power and no longer work. In the later stage of the electromagnetic brake disc DC losing power, the brake pads move quickly inwards and tightly contact the outer end of the brake disc 4, and the main shaft of the paddle mixer body M1 stops rotating immediately.

[0018] Figure 1 , 2 As shown above, in the present new application, when the main shaft or the stirring blades are entangled with foreign objects and there is a probability of strangulation, resulting in damage to the motor, the power supply of the motor can be turned off in the shortest possible time and the motor shaft can be braked immediately (the entanglement of foreign objects will be more serious if the main shaft continues to rotate). At the same time, an alarm can be sounded to remind the staff to clear the entanglement, thereby minimizing the probability of damage to the motor due to the entanglement of the motor main shaft and the stirring blades. Figure 2Among them, the resistance values of resistors R1, R2, R3, and R4 are 8K, 4.7K, 200K, and 10K respectively; the model of thyristor VS is MCR100-1; the power supply module W1 is an AC 220V to DC 12V power supply module; the resistance value of adjustable resistor RP1 is 470K (in this embodiment, it is adjusted to 41K. Specifically, the larger the resistance value of adjustable resistor RP1 is adjusted, the greater the voltage division between it and resistor R1. In this way, when the main shaft speed of paddle mixer body M1 is relatively faster, triode Q1 will conduct, that is, the motor shaft speed monitoring threshold of paddle mixer body M1 is set relatively large; the smaller the resistance value of adjustable resistor RP1 is adjusted, the smaller the voltage division between it and resistor R1. In this way, when the main shaft speed of paddle mixer body M1 is relatively slower, triode Q1 will conduct, that is, the motor shaft speed monitoring threshold of paddle mixer body M1 (3.5KW) is set relatively small. The specific threshold is set by production or terminal technicians according to actual production needs); relay K2 is a DC12V relay; buzzer B is an active continuous sound buzzer alarm of model XQ12V; triodes Q1 and Q2 are NPN triodes of model 9013; triode Q3 is a PNP triode of model 9012; generator M is a small 6V DC generator; the model of battery G1 is 12V / 5Ah; electromagnetic brake disc DC is a power-off holding electromagnetic brake of model XM-062.

[0019] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0020] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A paddle mixer device for preventing strangulation, comprising a paddle mixer body, a DC generator, an electromagnetic brake disc, and a casing, characterized in that: It also has a detection circuit and a trigger control circuit; a brake disc is installed on the outer side of the upper end of the motor main shaft of the paddle mixer body, the electromagnetic brake disc is installed on the outer side of the upper end of the motor shell, and a protective shell is installed on the outer side of the upper end of the motor shell; the rotating shaft of the DC generator is installed with a rubber wheel, and the DC generator is installed at the lower end of the motor shell; a bearing is installed at the lower end of the casing, the main shaft is sleeved in the inner ring of the bearing, and the upper end of the casing is installed at the lower end of the motor shell; the detection circuit and the trigger control circuit are installed in the component box, the signal output end of the generator is electrically connected to the signal input end of the detection circuit, the power output end of the trigger control circuit is electrically connected to the electromagnetic brake disc and the power input end of the paddle mixer body; the signal output end of the detection circuit is electrically connected to the signal input end of the trigger control circuit.

2. A strangulation-proof paddle mixer device according to claim 1, characterized in that: The side end of the rubber wheel is in rotational contact with the side end of the main shaft, and the outer diameter of the rubber wheel is larger than the outer diameter of the shell of the generator.

3. The anti-strangulation paddle mixer device according to claim 1, characterized in that: The brake pad of the electromagnetic brake disc is located at the outer end of the brake disc, and the two are spaced apart.

4. The anti-strangulation paddle mixer device according to claim 1, characterized in that: The detection circuit includes an electrically connected adjustable resistor, a resistor, and a transistor. One end of the first resistor is connected to one end of the adjustable resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the transistor. The collector of the transistor is connected to one end of the third resistor. The emitter of the transistor is connected to the other end of the first resistor.

5. The anti-strangulation paddle mixer device according to claim 1, characterized in that: The trigger control circuit includes an electrically connected transistor, a resistor, a thyristor, an alarm, a relay, and a power switch. One end of the power switch is connected to the emitter of the first transistor, the collector of the second transistor is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the first resistor, the other end of the first resistor is connected to the control electrode of the thyristor, the cathode of the thyristor is connected to the positive power input end of the relay and the positive power input end of the alarm, and the negative power input end of the alarm is connected to the negative power input end of the relay and the emitter of the second transistor.

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