Air supply system with variable compressed air

Abstract

The utility model relates to an air supply system with variable compressed air. The air supply system comprises a first compressed air pipeline, a second compressed air pipeline, a main air supply pipeline, an auxiliary air supply pipeline, a communicating pipeline, an auxiliary electromagnetic valve and a control circuit used for controlling the auxiliary electromagnetic valve, the first end of the main air supply pipeline is connected with a first compressed air pipeline, the first end of the auxiliary air supply pipeline is connected with a second compressed air pipeline, the second end of the main air supply pipeline and the second end of the auxiliary air supply pipeline are both connected with the first end of the communicating pipeline, and the second end of the communicating pipeline is connected to a position needing air supply; the auxiliary electromagnetic valve is arranged on the auxiliary air supply pipeline, and the control circuit is connected with the auxiliary electromagnetic valve. According to the utility model, compressed air with variable pressure can be provided as required, so that the stability of process production is met, and the compressed air usage amount is saved.

Description

Technical Field

[0001] The utility model relates to an air supply system for providing compressed air with variable pressure for industrial equipment. Background Art

[0002] Industrial equipment often requires compressed air during use. For example, the main equipment used in chemical fiber production is the winder, which needs to continuously provide compressed air to its network device during operation. The compressed air pressure required by the network device during the winding head lifting and switching process is greater than the compressed air pressure required by the network device during the winding process. However, the current winder design can only provide one channel of network compressed air with constant pressure, so high-pressure compressed air is continuously provided during use, resulting in high compressed air costs. Summary of the invention

[0003] The utility model aims to provide a variable compressed air supply system which can automatically switch to provide compressed air with different pressures according to needs, thereby avoiding waste of compressed air.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A variable compressed air supply system, comprising a first compressed air pipeline, a second compressed air pipeline, a main air supply pipeline, an auxiliary air supply pipeline, a connecting pipeline, an auxiliary air supply solenoid valve and a control circuit for controlling the auxiliary air supply solenoid valve; the first end of the main air supply pipeline is connected to the first compressed air pipeline, the first end of the auxiliary air supply pipeline is connected to the second compressed air pipeline, the second end of the main air supply pipeline and the second end of the auxiliary air supply pipeline are both connected to the first end of the connecting pipeline, and the second end of the connecting pipeline is connected to the air supply position; the auxiliary air supply solenoid valve is arranged on the auxiliary air supply pipeline, and the control circuit is connected to the auxiliary air supply solenoid valve; the control circuit comprises a first intermediate relay, a power-on delay time relay and a second intermediate relay, the normally closed contact of the second intermediate relay is connected in series with the coil of the first intermediate relay to form a first branch, and the first group of normally open contacts of the first intermediate relay is connected to the first group of normally open contacts of the first intermediate relay. The delayed breaking contacts of the power-on delay time relay are connected in series to form a second branch, the second group of normally open contacts of the first intermediate relay is connected to the coil of the power-on delay time relay to form a third branch, the coil of the auxiliary circuit solenoid valve constitutes a fourth branch, and the coil of the second intermediate relay constitutes a fifth branch. The first end of the first branch is connected to a start node that provides a boost air supply start signal, the first end of the second branch and the first end of the third branch are both connected to a power supply end that provides a working power supply, the second end of the second branch is connected to the first end of the first branch, the fourth branch is connected in parallel to both ends of the coil of the power-on delay time relay, one end of the fifth branch is connected to a stop node that provides a boost air supply stop signal, and the second end of the first branch, the second end of the third branch, the second end of the fourth branch, and the second end of the fifth branch are all connected to a zero potential point.

[0006] The variable compressed air supply system also includes an auxiliary valve, which is arranged on the auxiliary air supply pipeline and located upstream of the auxiliary solenoid valve.

[0007] The control circuit further includes a diode, an anode of the diode is connected to the start node, and a cathode of the diode is connected to the first end of the first branch.

[0008] The variable compressed air supply system also includes a main solenoid valve, which is arranged on the main air supply pipeline.

[0009] The variable compressed air supply system also includes a main valve, which is arranged on the main air supply pipeline and located upstream of the main solenoid valve.

[0010] The variable compressed air supply system also includes a one-way valve, which is arranged on the main air supply pipeline and located downstream of the main electromagnetic valve.

[0011] The variable pressure air supply system also includes a terminal box, and the control circuit is arranged in the terminal box.

[0012] The variable compressed air supply system is arranged in the winding machine, and the second end of the connecting pipeline is connected to the network device of the winding machine.

[0013] The first end of the first branch is connected to a sensor in the winding machine for outputting a feedback signal when detecting that the switching device is switched to the middle position.

[0014] The first end of the fifth branch is connected to the scissors solenoid valve in the winding machine.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: the utility model can provide compressed air with variable pressure according to needs, thereby meeting the stability of process production and saving compressed air usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a structural schematic diagram of the variable compressed air supply system of the utility model.

[0017] Attached Figure 2 The utility model is a circuit diagram of a control circuit in the variable compressed air supply system.

[0018] In the above figures: 1. First compressed air pipeline; 2. Second compressed air pipeline; 3. Main valve; 4. Auxiliary valve; 5. Main solenoid valve; 6. One-way valve; 7. Auxiliary solenoid valve; 8. Connecting pipeline; 9. Winding machine; 10. Network device; 11. Terminal box; 12. Pressurized air supply start signal; 13. Diode; 14. Normally closed contact of the second intermediate relay KA2; 15. Coil of the first intermediate relay KA1; 16. Working power supply; 17. First intermediate relay KA2; 18. The first group of normally open contacts of the intermediate relay KA1; 18. The delayed breaking contacts of the power-on delay time relay KT; 19. The second group of normally open contacts of the first intermediate relay KA1; 20. The coil of the power-on delay time relay KT; 21. The coil of the auxiliary solenoid valve 7; 22. The boost air supply stop signal; 23. The coil of the second intermediate relay KA2; 24. The first branch; 25. The second branch; 26. The third branch; 27. The fourth branch; 28. The fifth branch. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0020] Embodiment 1: As shown in the attached Figure 1As shown, a variable compressed air supply system is arranged in a winding machine 9 and is used to provide compressed air for the network device 10 of the winding machine 9. It mainly includes a first compressed air pipeline 1, a second compressed air pipeline 2, a main air supply line, an auxiliary air supply line, a connecting line 8, an auxiliary line solenoid valve 7 and a control circuit.

[0021] The first compressed air pipeline 1 and the second compressed air pipeline 2 are respectively connected to the compressed air system, and the compressed air system is used to provide dry compressed air. The first end of the main air supply pipeline is connected to the first compressed air pipeline 1, the first end of the auxiliary air supply pipeline is connected to the second compressed air pipeline 2, the second end of the main air supply pipeline and the second end of the auxiliary air supply pipeline are both connected to the first end of the connecting pipeline 8, and the second end of the connecting pipeline 8 is connected to the position where air supply is required. In this embodiment, the second end of the connecting pipeline 8 is connected to the network device 10 of the winding machine 9. The connecting pipeline 8 can adopt a PVC pipe of suitable diameter.

[0022] The auxiliary electromagnetic valve 7 is arranged on the auxiliary gas supply pipeline, and the control circuit arranged in the terminal box 11 is connected to the auxiliary electromagnetic valve 7, so that the control circuit is used to control the auxiliary electromagnetic valve 7. The auxiliary electromagnetic valve 7 is a two-position two-way electromagnetic valve.

[0023] As attached Figure 2As shown, the control circuit mainly includes the first intermediate relay KA1, the power-on delay time relay KT and the second intermediate relay KA2. The normally closed contact 14 of the second intermediate relay KA2 is connected in series with the coil 15 of the first intermediate relay KA1 to form a first branch 24, the first group of normally open contacts 17 of the first intermediate relay KA1 is connected in series with the delayed break contact 18 of the power-on delay time relay KT to form a second branch 25, the second group of normally open contacts 19 of the first intermediate relay KA1 is connected with the coil 20 of the power-on delay time relay KT to form a third branch 26, the coil 21 of the auxiliary electromagnetic valve 7 forms a fourth branch 27, and the coil 23 of the second intermediate relay KA2 forms a fifth branch 28. The first end of the first branch 24 is connected to the start node that provides the boost air supply start signal 12 (input signal 1), the first end of the second branch 25 and the first end of the third branch 26 are both connected to the power supply end that provides the working power supply 16, the second end of the second branch 25 is connected to the first end of the first branch 24, the fourth branch 27 is connected in parallel to the two ends of the coil 20 of the power-on delay time relay KT, one end of the fifth branch 28 is connected to the stop node that provides the boost air supply stop signal 22 (input signal 2), the second end of the first branch 24, the second end of the third branch 26, the second end of the fourth branch 27, and the second end of the fifth branch 28 are all connected to the zero potential point. The control circuit can also include a diode 13, the positive pole of the diode 13 is connected to the start node, and the negative pole of the diode 13 is connected to the first end of the first branch 24. The diode 13 is used to prevent the reverse voltage from causing a malfunction of the winding machine 9. The components in the detection circuit can be detected by 1mm 2 Connect the BVR wires.

[0024] In this embodiment, the first end of the first branch 24 is connected to a sensor in the winding machine 9 for outputting a feedback signal when detecting that the switching device is switched to the middle position, the first end of the fifth branch 28 is connected to the scissors solenoid valve in the winding machine 9, and the first end of the second branch 25 and the first end of the third branch 26 are connected to a 24V DC power supply in the winding machine 9.

[0025] The variable compressed air supply system also includes an auxiliary valve 4, which is arranged on the auxiliary air supply pipeline and located upstream of the auxiliary electromagnetic valve 7. The auxiliary valve 4 adopts a ball valve, which can manually control the opening and closing of the auxiliary air supply pipeline, which is convenient for maintenance.

[0026] The variable compressed air supply system also includes a main electromagnetic valve 5, a main valve 3 and a check valve 6. The main electromagnetic valve 5 is arranged on the main air supply pipeline, and the main electromagnetic valve 5 also adopts a two-position two-way electromagnetic valve. The main valve 3 is arranged on the main air supply pipeline and is located upstream of the main electromagnetic valve 5, and the main valve 3 also adopts a ball valve. The check valve 6 is arranged on the main air supply pipeline and is located downstream of the main electromagnetic valve 5 to avoid cross-pressure between the main air supply pipeline and the auxiliary air supply pipeline.

[0027] The electrical control system of the winding machine 9 is also installed in the terminal box 11. The main electromagnetic valve 5, the auxiliary electromagnetic valve 7 and the electrical control system of the winding machine 9 are switched in the terminal box 11.

[0028] In the above scheme, the first compressed air pipeline 1, the main air supply pipeline, the first valve, the main circuit solenoid valve 5, and the connecting pipeline 8 constitute the first network compressed air branch for providing compressed air to the network device 10 of the winding machine 9, and the second compressed air pipeline 2, the auxiliary air supply pipeline, the second valve, the auxiliary circuit solenoid valve 7, and the connecting pipeline 8 constitute the second network compressed air branch for providing compressed air to the network device 10 of the winding machine 9. The pressure of the first network compressed air branch is less than the pressure of the second network compressed air branch. The pressure of the first network compressed air branch is generally 0.1MPa, and the pressure of the second network compressed air branch is adjusted according to the process product requirements. The first network compressed air branch can be a branch provided by the winding machine 9.

[0029] The working principle of the above-mentioned variable compressed air supply system is:

[0030] The winding machine 9 needs to use relatively low-pressure compressed air during the normal winding process. At this time, the first valve and the main electromagnetic valve 5 are both opened, and relatively low-pressure compressed air is provided to the network device 10 through the first network compressed air branch.

[0031] When the winding machine 9 is performing the head lifting operation and the switching operation, when the lower switching device is switched to the middle position, the sensor outputs a 24V feedback signal as the boost air supply start signal 12 and provides it to the first branch 24 in the control circuit, the coil 15 of the first intermediate relay KA1 is energized, the first group of normally open contacts 17 of the first intermediate relay KA1 are closed to form a self-locking, and at the same time, the second group of normally open contacts 19 of the first intermediate relay KA1 are closed, so that the coil 20 of the power-on delay time relay KT and the coil 21 of the auxiliary circuit solenoid valve 7 are both energized to work, and the auxiliary air supply pipeline is opened to provide relatively high pressure compressed air for the network device 10. According to the delay time set by the power-on delay time relay, after the coil 20 of the power-on delay time relay KT is energized to reach the delay time, the delayed break contact 18 of the power-on delay time relay KT is disconnected, and the auxiliary circuit solenoid valve 7 stops working and cuts off the auxiliary air supply pipeline.

[0032] When the winding machine 9 fails or breaks, the scissors solenoid valve in the winding machine 9 gives an action signal as a boost air supply stop signal 22 and is provided to the fifth branch 28 in the control circuit, the coil 23 of the second intermediate relay KA2 is energized, the normally closed contact 14 of the second intermediate relay KA2 is disconnected, the coil 15 of the first intermediate relay KA1 is de-energized, the second group of normally open contacts 19 of the first intermediate relay KA1 is disconnected, the coil 21 of the auxiliary solenoid valve 7 is de-energized, the auxiliary solenoid valve 7 stops working and cuts off the auxiliary air supply pipeline, to avoid failure or breakage within the set time, the solenoid valve continues to work, resulting in waste of compressed air and re-timing when re-raising the head, to avoid product abnormalities.

[0033] The above scheme connects the compressed air to the network device 10 in parallel through two paths, one path continuously provides compressed air for the low-pressure side, and the other path provides compressed air to the network device 10 for the high-pressure side during the process of the winding machine 9 raising the head or the winding machine 9 switching, and sets the operating time delay disconnection, thereby meeting the stability of the process production and saving the use of compressed air.

[0034] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A variable compressed air supply system, characterized in that: The variable compressed air supply system includes a first compressed air pipeline, a second compressed air pipeline, a main air supply pipeline, an auxiliary air supply pipeline, a connecting pipeline, an auxiliary air solenoid valve and a control circuit for controlling the auxiliary air solenoid valve; the first end of the main air supply pipeline is connected to the first compressed air pipeline, the first end of the auxiliary air supply pipeline is connected to the second compressed air pipeline, the second end of the main air supply pipeline and the second end of the auxiliary air supply pipeline are both connected to the first end of the connecting pipeline, and the second end of the connecting pipeline is connected to the air supply position; the auxiliary air solenoid valve is arranged on the auxiliary air supply pipeline, and the control circuit is connected to the auxiliary air solenoid valve; the control circuit includes a first intermediate relay, a power-on delay time relay and a second intermediate relay, the normally closed contact of the second intermediate relay is connected in series with the coil of the first intermediate relay to form a first branch, and the first group of normally open contacts of the first intermediate relay is connected to the required air supply position. The delayed breaking contacts of the power-on delay time relay are connected in series to form a second branch, the second group of normally open contacts of the first intermediate relay is connected to the coil of the power-on delay time relay to form a third branch, the coil of the auxiliary circuit solenoid valve constitutes a fourth branch, and the coil of the second intermediate relay constitutes a fifth branch. The first end of the first branch is connected to a start node that provides a boost air supply start signal, the first end of the second branch and the first end of the third branch are both connected to a power supply end that provides a working power supply, the second end of the second branch is connected to the first end of the first branch, the fourth branch is connected in parallel to the two ends of the coil of the power-on delay time relay, one end of the fifth branch is connected to a stop node that provides a boost air supply stop signal, and the second end of the first branch, the second end of the third branch, the second end of the fourth branch, and the second end of the fifth branch are all connected to a zero potential point.

2. The variable compressed air supply system according to claim 1, characterized in that: The variable compressed air supply system also includes an auxiliary valve, which is arranged on the auxiliary air supply pipeline and located upstream of the auxiliary solenoid valve.

3. The variable compressed air supply system according to claim 1, characterized in that: The control circuit further includes a diode, an anode of the diode is connected to the start node, and a cathode of the diode is connected to the first end of the first branch.

4. The variable compressed air supply system according to claim 1, characterized in that: The variable compressed air supply system also includes a main solenoid valve, which is arranged on the main air supply pipeline.

5. The variable compressed air supply system according to claim 4, characterized in that: The variable compressed air supply system also includes a main valve, which is arranged on the main air supply pipeline and located upstream of the main solenoid valve.

6. The variable compressed air supply system according to claim 4, characterized in that: The variable compressed air supply system also includes a one-way valve, which is arranged on the main air supply pipeline and located downstream of the main solenoid valve.

7. The variable compressed air supply system according to claim 1, characterized in that: The variable-pressure air supply system further includes a terminal box, in which the control circuit is disposed.

8. The variable compressed air supply system according to claim 1, characterized in that: The variable compressed air supply system is arranged in the winding machine, and the second end of the connecting pipeline is connected to the network device of the winding machine.

9. The variable compressed air supply system according to claim 8, characterized in that: The first end of the first branch is connected to a sensor in the winding machine for outputting a feedback signal when detecting that the switching device is switched to the middle position.

10. The variable compressed air supply system according to claim 8, characterized in that: The first end of the fifth branch is connected to the scissors solenoid valve in the winding machine.

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