Metering pump motor brake circuit

Abstract

The utility model discloses a metering pump motor brake circuit which comprises a power supply circuit breaker QF1, a self-locking button switch SB, an intermediate relay K1, a GA500 frequency converter and a brake indicating lamp HL1, one end of the power supply circuit breaker QF1 is connected with a positive terminal L of direct current, and the other end of the power supply circuit breaker QF1 is respectively connected with one end of the self-locking button switch SB and one end of a first normally open contact K1-1 of the intermediate relay K1. And the other end of the self-locking button switch SB is connected with one end of a coil of the intermediate relay K1. When a spinneret plate needs to be shoveled, a self-locking button switch SB is pressed down, a coil of an intermediate relay K1 is electrified and attracted, a first normally open contact K1-1 and a second normally open contact K1-2 of the intermediate relay K1 are closed, a GA500 frequency converter starts a direct-current braking function, a metering pump motor brakes, a pump body stops rotating under the state that melt pressure exists, and the spinneret plate is shoveled. Therefore, no melt exudes from the spinneret plate, and efficient plate shoveling operation can be conveniently carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of spinning electrical equipment, and more specifically, to a brake circuit for a metering pump motor. Background Art

[0002] During spinning production, it is necessary to regularly scrape the dirt and pulp blocks on the spinning spinneret to prevent the yarn from breaking and drifting. During the scraping operation, the metering pump of the extrusion melt equipment rotates under the pressure of the melt in the pipeline, causing melt to leak out of the spinneret, and the spinneret cannot be completely cleaned, which increases the phenomenon of broken and drifting yarns during the production process, affecting normal production.

[0003] Therefore, it is necessary to propose a new solution to solve the above problems. Utility Model Content

[0004] The utility model aims to overcome the above-mentioned deficiencies of the prior art and provide a brake circuit for a metering pump motor.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A metering pump motor brake circuit comprises a power circuit breaker QF1, a self-locking push button switch SB, an intermediate relay K1, a GA500 inverter, and a brake indicator light HL1, wherein one end of the power circuit breaker QF1 is connected to a positive terminal L of direct current, the other end of the power circuit breaker QF1 is respectively connected to one end of the self-locking push button switch SB and one end of a first normally open contact K1-1 of the intermediate relay K1, the other end of the self-locking push button switch SB is connected to one end of a coil of the intermediate relay K1, the other end of the first normally open contact K1-1 of the intermediate relay K1 is connected to one end of the brake indicator light HL1, the other end of the coil of the intermediate relay K1 is connected to the other end of the brake indicator light HL1, and the common connection end thereof is connected to a negative terminal N of direct current, the terminal SN of the GA500 inverter is connected to the terminal S4 of the GA500 inverter via the second normally open contact K1-2 of the intermediate relay K1, and the normally closed contact K1-3 of the intermediate relay K1 is connected to a start-stop control circuit of the metering pump.

[0007] Furthermore, the minimum output frequency of the GA500 inverter is set to 0.1 Hz.

[0008] Furthermore, the function of the terminal S4 of the GA500 inverter is selected as H1-04, and the setting value is 60, so that the GA500 inverter starts DC braking when the terminal SN and the terminal S4 are turned on.

[0009] Furthermore, the metering pump start-stop control circuit includes a power circuit breaker QF2, a metering pump stop button SB7, a metering pump start button SB8, an intermediate relay KA8, and an operation indicator light HL5. One end of the power circuit breaker QF2 is connected to a positive terminal L of a direct current, and the other end of the power circuit breaker QF2 is connected to one end of the metering pump stop button SB7. The other end of the metering pump stop button SB7 is respectively connected to one end of the metering pump start button SB8 and one end of the normally open contact KA8-1 of the intermediate relay KA8. The metering pump start button SB The other end of 8 is connected to the other end of the normally open contact KA8-1 of the intermediate relay KA8, and the common connection end is connected to the fault output terminal MB of the GA500 inverter. The fault output terminal MC of the GA500 inverter is connected to one end of the normally closed contact K1-3 of the intermediate relay K1. The other end of the normally closed contact K1-3 of the intermediate relay K1 is respectively connected to one end of the coil of the intermediate relay KA8 and one end of the operating indicator light HL5. The other end of the coil of the intermediate relay KA8 is connected to the other end of the operating indicator light HL5, and the common connection end is connected to the negative terminal N of the direct current.

[0010] The beneficial effect of the utility model is as follows: in the utility model, when it is necessary to scrape the spinneret, the self-locking button switch SB is pressed to close the self-locking button switch SB, the coil of the intermediate relay K1 is energized and attracted, so that the first normally open contact K1-1 and the second normally open contact K1-2 of the intermediate relay K1 are closed, the GA500 inverter starts the DC braking function, the metering pump motor brakes, and the pump body stops rotating under the condition of melt pressure, so that there is no melt seepage from the spinneret, so as to facilitate efficient scraping operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A circuit diagram of a brake circuit of a metering pump motor in this embodiment;

[0012] Figure 2 This is a circuit diagram of the metering pump start-stop control circuit in this embodiment. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] Embodiment: A metering pump motor brake circuit, such as Figure 1-Figure 2As shown, it includes a power circuit breaker QF1, a self-locking push button switch SB, an intermediate relay K1, a GA500 inverter, and a brake indicator light HL1. One end of the power circuit breaker QF1 is connected to the positive terminal L of a 24V DC power supply, and the other end of the power circuit breaker QF1 is respectively connected to one end of the self-locking push button switch SB and one end of the first normally open contact K1-1 of the intermediate relay K1, the other end of the self-locking push button switch SB is connected to one end of the coil of the intermediate relay K1, the other end of the first normally open contact K1-1 of the intermediate relay K1 is connected to one end of the brake indicator light HL1, the other end of the coil of the intermediate relay K1 is connected to the other end of the brake indicator light HL1, and their common connection end is connected to the negative terminal N of the 24V DC power supply, the terminal SN of the GA500 inverter is connected to the terminal S4 of the GA500 inverter through the second normally open contact K1-2 of the intermediate relay K1, and the normally closed contact K1-3 of the intermediate relay K1 is connected to the start and stop control circuit of the metering pump.

[0015] Among them, the model of GA500 inverter is Yaskawa GA500, the minimum output frequency of GA500 inverter is set to 0.1Hz, the function selection of terminal S4 of GA500 inverter is H1-04, and the setting value is 60, so that the GA500 inverter starts DC braking when terminal SN and terminal S4 are turned on.

[0016] During spinning production, the metering pump is in a free pump state. At this time, the power circuit breaker QF1 is closed, the self-locking button switch SB is disconnected, and the first normally open contact K1-1 and the second normally open contact K1-2 of the intermediate relay K1 are disconnected; when it is necessary to scrape the spinneret, the self-locking button switch SB is pressed to close the self-locking button switch SB, and the coil of the intermediate relay K1 is energized and attracted, so that the first normally open contact K1-1 and the second normally open contact K1-2 of the intermediate relay K1 are closed; because the first normally open contact K1-1 of the intermediate relay K1 is closed, the brake indicator light HL1 is energized and lights up, and at the same time, because the second normally open contact K1-2 of the intermediate relay K1 is closed, the GA500 inverter terminal SN and terminal S4 are turned on, and the GA500 inverter starts the DC braking function, the metering pump motor brakes, and the pump body stops rotating under the condition of melt pressure, so that there is no melt seepage from the spinneret, so as to facilitate efficient scraping operation.

[0017] Further, such as Figure 2As shown, the metering pump start and stop control circuit includes a power circuit breaker QF2, a metering pump stop button SB7, a metering pump start button SB8, an intermediate relay KA8, and an operation indicator light HL5. One end of the power circuit breaker QF2 is connected to the positive terminal L of a 24V DC power supply, and the other end of the power circuit breaker QF2 is connected to one end of the metering pump stop button SB7. The other end of the metering pump stop button SB7 is respectively connected to one end of the metering pump start button SB8 and one end of the normally open contact KA8-1 of the intermediate relay KA8. The other end of the metering pump start button SB8 is connected to the other end of the normally open contact KA8-1 of the intermediate relay KA8, and their common connection end is connected to the fault output terminal MB of the GA500 inverter. The fault output terminal MC of the GA500 inverter is respectively connected to one end of the coil of the intermediate relay KA8 and one end of the operation indicator light HL5. The other end of the coil of the intermediate relay KA8 is connected to the other end of the operation indicator light HL5, and their common connection end is connected to the negative terminal N of the 24V DC power supply.

[0018] When in use, connect the normally closed contact K1-3 of the intermediate relay K1 to the start-stop control circuit of the metering pump, that is, the fault output terminal MC of the GA500 inverter is connected to one end of the normally closed contact K1-3 of the intermediate relay K1, and the other end of the normally closed contact K1-3 of the intermediate relay K1 is connected to one end of the coil of the intermediate relay KA8 and one end of the operation indicator HL5. By connecting the normally closed contact K1-3 of the intermediate relay K1 in series in the start-stop control circuit of the metering pump, the brake start-stop of the metering pump is interlocked with the start-stop of the metering pump during production operation, ensuring that the system operates stably in the above two start-stop modes.

[0019] During spinning production, the power circuit breaker QF2 is closed, the metering pump start button SB8 is pressed, the intermediate relay KA8 coil is energized and attracted, so that the normally open contact KA8-1 of the intermediate relay KA8 is closed, and the metering pump starts running; the metering pump is in the braking state, because the normally closed contact K1-3 of the intermediate relay K1 is disconnected, the metering pump cannot start running.

[0020] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A metering pump motor brake circuit, characterized in that: It includes a power circuit breaker QF1, a self-locking button switch SB, an intermediate relay K1, a GA500 inverter, and a brake indicator light HL1. One end of the power circuit breaker QF1 is connected to a positive terminal L of direct current, and the other end of the power circuit breaker QF1 is respectively connected to one end of the self-locking button switch SB and one end of the first normally open contact K1-1 of the intermediate relay K1, the other end of the self-locking button switch SB is connected to one end of the coil of the intermediate relay K1, the other end of the first normally open contact K1-1 of the intermediate relay K1 is connected to one end of the brake indicator light HL1, the other end of the coil of the intermediate relay K1 is connected to the other end of the brake indicator light HL1, and the common connection end is connected to the negative terminal N of direct current, the terminal SN of the GA500 inverter is connected to the terminal S4 of the GA500 inverter through the second normally open contact K1-2 of the intermediate relay K1, and the normally closed contact K1-3 of the intermediate relay K1 is connected to the start and stop control circuit of the metering pump.

2. A metering pump motor brake circuit according to claim 1, characterized in that: The minimum output frequency of the GA500 inverter is set to 0.1 Hz.

3. A metering pump motor brake circuit according to claim 1, characterized in that: The function selection of terminal S4 of the GA500 inverter is H1-04, and the setting value is 60, so that the GA500 inverter starts DC braking when terminal SN and terminal S4 are turned on.

4. A metering pump motor brake circuit according to claim 1, characterized in that: The metering pump start-stop control circuit includes a power circuit breaker QF2, a metering pump stop button SB7, a metering pump start button SB8, an intermediate relay KA8, and an operation indicator light HL5. One end of the power circuit breaker QF2 is connected to the positive terminal L of the direct current, and the other end of the power circuit breaker QF2 is connected to one end of the metering pump stop button SB7. The other end of the metering pump stop button SB7 is respectively connected to one end of the metering pump start button SB8 and one end of the normally open contact KA8-1 of the intermediate relay KA8. The other end is connected to the other end of the normally open contact KA8-1 of the intermediate relay KA8, and the common connection end is connected to the fault output terminal MB of the GA500 inverter. The fault output terminal MC of the GA500 inverter is connected to one end of the normally closed contact K1-3 of the intermediate relay K1. The other end of the normally closed contact K1-3 of the intermediate relay K1 is respectively connected to one end of the coil of the intermediate relay KA8 and one end of the operating indicator light HL5. The other end of the coil of the intermediate relay KA8 is connected to the other end of the operating indicator light HL5, and the common connection end is connected to the negative terminal N of the direct current.

Images