[0027] Figure 1~3 It is the best embodiment of the present invention. Figure 1~3 The present invention will be further explained.
[0028] Such as figure 1 As shown, a dye vat water circulation system includes a dye vat 1, a recovery pool 9 and a waste water pool 11. A dye vat water injection pipe 2 for injecting water into the dye vat 1 is provided on the top of the dye vat 1, a dye vat drain pipe 10 for draining water is provided at the bottom of the dye vat 1, and the dye vat drain pipe 10 is connected to a waste water tank 11.
[0029] Such as figure 2 As shown, a threaded heat exchange tube 12 is provided in the dyeing vat 1. The inlet and outlet of the threaded heat exchange tube 12 are respectively connected to one end of the heat exchange water injection pipe 3 and the heat exchange water outlet pipe 4, and the other end of the heat exchange water injection pipe 3 passes through The wall of the dyeing vat 1 is connected to a heat exchange source, and the other end of the heat exchange water outlet pipe 4 passes through the wall of the dyeing vat 1 and is connected to the recovery pool 9.
[0030] An injection pump inlet pipe 8 is also provided on the recovery pool 9. One end of the injection pump inlet pipe 8 is connected to the bottom of the recovery pool 9, and the other end is connected to the water inlet of the injection pump 6. The water outlet of the injection pump 6 is connected to the dye tank water injection pipe 2 described above. A water inlet pipe of an external water source is also connected to the recovery pool 9 ( figure 1 Not drawn in).
[0031] The water injection pump inlet pipe 8 between the injection pump 6 and the recovery pool 9 is provided with a discharge branch for eliminating the water hammer effect. The discharge branch includes a discharge pipe 5 and a discharge valve 7 arranged in the discharge pipe 5 , One end of the drain pipe 5 is connected in parallel to the water injection pump inlet pipe 8, and the other end is connected to the recovery pool 9.
[0032] Such as image 3 As shown, the control unit of the water circulation system of the dyeing vat includes: a controller, a water injection pump 6, a first liquid level transmitter, a second liquid level transmitter, a time relay and multiple solenoid valves. The signal output ends of the first liquid level transmitter and the second liquid level transmitter are connected to the signal input end of the controller, and the control signal output end of the controller is connected to the control signal input end of the water injection pump 6; multiple solenoid valves It includes the above-mentioned discharge valve 7, a solenoid valve installed in the water inlet pipe of the external water source, and a solenoid valve installed in the dye vat drain pipe 10. The time relay is set between the relief valve 7 and the controller. The signal output terminal of the controller is connected to the power input terminal of the time relay at the same time. The time relay adopts the power-off delay type time relay, and the normally open contacts of the time relay are connected in series. In the power supply circuit of the relief valve 7.
[0033] The first liquid level transmitter adopts a pressure type liquid level transmitter and is installed at the bottom of dyeing vat 1. The liquid level in dyeing vat 1 is judged by feeling the pressure at the bottom; the second liquid level transmitter also adopts pressure type liquid The position transmitter is installed at the bottom of the recovery pool 9, and judges by feeling the liquid level in the recovery pool 9 at the bottom.
[0034] The specific working process and working principle are as follows:
[0035] The first liquid level transmitter monitors the dye water level in dyeing vat 1 in real time, and sends the monitored data to the controller. When the controller determines that the liquid level in dyeing vat 1 is lower than the set level, it controls The device sends a control signal to the water injection pump 6, and after the water injection pump 6 works, the water in the recovery pool 9 is pumped into the dyeing vat 1 through the dyeing vat water injection pipe 2. When the liquid level in the dyeing vat 1 reaches the predetermined liquid level, the controller sends a control signal to the water injection pump 6 again, and the water injection pump 6 stops working.
[0036] Since the flow rate of water in the water passages at both ends of the water injection pump 6 is relatively fast, when the water injection pump 6 stops working, a water hammer effect will be formed in the water injection pump inlet pipe 8 instantly, which will have a greater impact on the water injection pump 6. Therefore, when the controller controls the water injection pump 6 to stop working, it sends a power supply signal to the time relay and turns it off. After the time relay receives the power supply signal, it closes its internal normally open contact and turns on the power supply circuit of the relief valve 7. The drain valve 7 is turned on, so the water that forms the water hammer effect in the water injection pump inlet pipe 8 will be discharged through the drain pipe 5 and discharged into the recovery pool 9. On the one hand, the water injection pump into the water pipe 8 is eliminated. The water hammer phenomenon, on the other hand, avoids the waste of water resources. Since the controller is disconnected again after sending the power supply signal to the time relay, the time relay starts timing. When the preset time is reached, the time relay acts, and its normally open contact is disconnected again, breaking the power supply circuit of the relief valve 7 Open, the relief valve 7 is closed.
[0037] In the process of dyeing the fabric in the dyeing vat 1, high temperature water enters the threaded heat exchange tube 12 inside the dyeing vat 1 through the heat exchange water injection pipe 3, and is discharged from the heat exchange outlet pipe 4 into the recovery pool 9. The water has a certain temperature remaining after the dye in the dye vat 1 is exchanged. Therefore, the water injection pump 6 puts the exchanged hot water discharged from the heat exchange outlet pipe 4 into the dye vat 1 again for use. On the one hand, the hot water exchange is realized. The secondary utilization of the water resources greatly reduces the waste of water resources. On the other hand, since the exchange hot water has a certain temperature, after being put into the dyeing vat 1 again, the heat exchange entering the heat exchange water injection pipe 3 is reduced to a certain extent. The temperature of the water has the technical effect of saving energy.
[0038] A second liquid level transmitter is installed in the recovery pool 9. When the liquid level in the recovery pool 9 drops to the lower limit water level, the controller controls the solenoid valve installed in the external water inlet pipe to be turned on, and the external water source flows to the recovery pool. Water is refilled in 9, when the water level in the recovery pool 9 reaches the upper limit of the water level, the water inlet pipe of the external water source is closed under the control of the controller. When the interior of the dyeing vat 1 needs to be drained, the controller controls the solenoid valve in the dyeing vat drain pipe 10 to open to realize the draining of the dyeing vat 1.
[0039] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Anyone familiar with the profession may use the technical content disclosed above to change or modify the equivalent of equivalent changes. Examples. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the protection scope of the technical solution of the present invention.
