A soft start control device for cylinder automatic door

Abstract

The present invention belongs to the technical field of pneumatic doors, and specifically relates to a pneumatic cylinder automatic door soft-start control device, comprising: an air inlet, a three-way valve, a shuttle valve, a three-position five-way reversing valve, and an automatic door left cylinder; the closing air inlet of the automatic door left cylinder and the automatic door right cylinder are connected to two branch pipes corresponding to the closing air inlet, respectively, and the opening air inlet of the automatic door left cylinder and the automatic door right cylinder are connected to two branch pipes corresponding to the opening air inlet, respectively, and the opening one-way throttle valve is connected to the first one-way throttle valve and the second one-way throttle valve; the output end of the PLC controller is electrically connected to the three-position five-way reversing valve and the two-position three-way reversing valve. The device mainly adopts a high-low air pressure switching method. When the automatic door is first started, the automatic door is slowly opened and closed with low air pressure to achieve a safe and stable effect. After the first opening and closing action of the automatic door is completed, a back pressure is formed in the cylinder and the pipeline. Afterwards, high-pressure air is introduced to control the opening and closing of the automatic door, so that the automatic door can open and close quickly and stably.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic doors, in particular to a soft-start control method for an automatic cylinder door. Background Art

[0002] Pneumatic doors are doors that open and close based on air pressure. They are driven by air pressure and do not require manual opening and closing of the door, making them more convenient to operate.

[0003] The control of pneumatic doors usually uses structures such as two-position three-way solenoid valves. The two-position three-way solenoid valves are usually used in conjunction with single-acting pneumatic thermal actuators. The two-position solenoid valves are two-position controllable, open-close, and the three-way solenoid valves have three channels for ventilation. Generally, one channel is connected to the air source, and the other two channels are connected to the air inlet and exhaust ports of the actuator, respectively. For the specific working principle, please refer to the working principle diagram of the single-acting pneumatic actuator.

[0004] In actual use, due to the high air pressure required for pneumatic door drive, the automatic door cylinder and pipeline are placed in a state without back pressure for a long time. Suddenly, high-pressure gas is introduced to control the opening and closing of the automatic door. There is no pressure on one side of the cylinder, and high-pressure gas is rapidly introduced on the other side. The gas rod extends or retracts quickly, causing the automatic door to move rapidly and a safety accident. Summary of the Invention

[0005] The purpose of the present invention is to provide a soft start control method for a cylinder automatic door to solve the problem raised in the above background technology that due to the high air pressure required for pneumatic door driving, the automatic door cylinder and pipeline are placed in a state without back pressure for a long time, and high-pressure gas is suddenly introduced to control the opening and closing of the automatic door. There is no pressure on one side of the cylinder, and high-pressure gas is rapidly introduced on the other side, and the gas rod is quickly extended or retracted, resulting in rapid movement of the automatic door and a safety accident.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a cylinder automatic door soft start control method, the cylinder automatic door soft start control method is based on a cylinder automatic door soft start control device, the cylinder automatic door soft start control device comprises:

[0007] Air inlet end, three-way valve, shuttle valve, three-position five-way reversing valve, automatic door left cylinder, automatic door right cylinder, one-way throttle valve and PLC controller;

[0008] The air inlet end is connected to one interface of the tee through the air inlet pipe, and the other two interfaces of the tee are connected to the air inlet pipe 1 and the air inlet pipe 2 respectively. The other ends of the air inlet pipe 1 and the air inlet pipe 2 are connected to the air inlet end of the shuttle valve;

[0009] A two-position three-way reversing valve is installed on the pipeline of the air intake pipe 1, and a pressure reducing valve 1 is installed on the pipeline of the air intake pipe 2;

[0010] The air outlet end of the shuttle valve is connected to the air inlet end of the three-position five-way reversing valve, and the air outlet end of the three-position five-way reversing valve is respectively connected to the door closing air outlet pipe and the door opening air outlet pipe, and the door closing air outlet pipe and the door opening air outlet pipe are respectively connected to two branch pipes, and the two branches of the door closing air outlet pipe are respectively connected to the door closing air inlet ends of the automatic door left cylinder and the automatic door right cylinder, and the two branches of the door opening air outlet pipe are respectively connected to the door opening air inlet ends of the automatic door left cylinder and the automatic door right cylinder;

[0011] The closing air inlet ends of the left and right cylinders of the automatic door are connected to the first one-way throttle valve for closing the door and the second one-way throttle valve for closing the door respectively on two branch pipes, and the opening air inlet ends of the left and right cylinders of the automatic door are connected to the first one-way throttle valve for opening the door and the second one-way throttle valve for opening the door respectively on two branch pipes;

[0012] The output end of the PLC controller is electrically connected to the three-position five-way reversing valve and the two-position three-way reversing valve;

[0013] The specific operating steps of the cylinder automatic door soft start control method are as follows:

[0014] S1: The air inlet provides a stable pressure gas source, and the three-way valve divides the air source at the air inlet into two gas paths: low pressure and high pressure;

[0015] The low-pressure gas circuit is supplied with reduced pressure through a pressure reducing valve, and the high-pressure gas circuit is controlled on and off by a two-position three-way reversing valve;

[0016] S2: The shuttle valve is controlled by an OR gate, which combines the low-pressure and high-pressure gas lines, or the high-pressure gas line is discharged from the outlet of the shuttle valve, or the low-pressure gas line is discharged from the outlet of the shuttle valve;

[0017] S3: The three-position five-way reversing valve controls the air supply to the rodless chamber or rod chamber of the left cylinder or the right cylinder of the automatic door to inflate;

[0018] The first one-way throttle valve for closing the door and the second one-way throttle valve for closing the door respectively control the rod chamber or the exhaust throttle of the rod chamber of the left cylinder and the right cylinder of the automatic door; the first one-way throttle valve for opening the door and the second one-way throttle valve for opening the door respectively control the rod chamber or the exhaust throttle of the rod chamber of the left cylinder and the right cylinder of the automatic door;

[0019] S4: When the automatic door is started for the first time, the low-pressure air circuit is used to slowly open and close the automatic door to complete the first opening and closing action of the automatic door. A back pressure is formed in the left cylinder, right cylinder and pipeline of the automatic door, and then the high-pressure air circuit is introduced to control the opening and closing of the automatic door.

[0020] Preferably, the air inlet end provides a standard air supply with a pressure of 6 bar.

[0021] Preferably, an air source triplex is provided on the air intake pipe of the air intake end.

[0022] Preferably, the air source triplex includes a second pressure reducing valve, an air filter and an oil mist collector which are connected in sequence.

[0023] Preferably, the three-position five-way directional valve and the two-position three-way directional valve are both solenoid valves, the two-position three-way directional valve is a valve with a built-in solenoid valve YA1, and the three-position five-way directional valve is a valve with a built-in solenoid valve YA2 and solenoid valve YA3. The solenoid valve YA2 and solenoid valve YA3 are used to switch the air outlet of the three-position five-way directional valve, the closed air outlet pipe is connected between the solenoid valve YA2 and the closed air inlet end, and the open air outlet pipe is connected between the solenoid valve YA3 and the open air inlet end.

[0024] Preferably, the air supply output from the second air inlet pipe has an air pressure of 3 bar to 4 bar after passing through the first pressure reducing valve.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The system mainly uses high and low air pressure switching. When the automatic door is first started, low air pressure is used to slowly open and close the automatic door, achieving a safe and stable effect. After the first opening and closing of the automatic door, a back pressure is formed in the cylinder and pipeline. After that, high pressure air is introduced to control the opening and closing of the automatic door, which can achieve fast and stable opening and closing of the automatic door.

[0027] This control method avoids the situation where the automatic door cylinder and pipeline are placed in a state without back pressure for a long time, and high-pressure gas is suddenly introduced to control the opening and closing of the automatic door. There is no pressure on one side of the cylinder, and high-pressure gas is rapidly introduced on the other side, causing the gas rod to extend or retract quickly, resulting in a safety accident caused by the rapid movement of the automatic door. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a system logic block diagram among the PLC controller, the three-position five-way reversing valve, and the two-position three-way reversing valve of the present invention.

[0030] In the figure: 1. Air source triplex; 2. Automatic door left cylinder; 3. Automatic door right cylinder; 4. Shuttle valve; 5. Pressure reducing valve 1; 6. Three-position five-way reversing valve; 7. Two-position three-way reversing valve; 8. Three-way valve; 9. One-way throttle valve for closing the door 1; 10. One-way throttle valve for opening the door 1; 11. One-way throttle valve for opening the door 2; 12. One-way throttle valve for closing the door 2. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0033] Example 1:

[0034] See also Figure 1-2 The present invention provides a technical solution: a soft start control device for a cylinder automatic door, comprising:

[0035] Air inlet end, three-way valve 8, shuttle valve 4, three-position five-way reversing valve 6, automatic door left cylinder 2, automatic door right cylinder 3, one-way throttle valve and PLC controller;

[0036] Among them, the air inlet end is connected to an interface of the tee 8 through the air inlet pipe, and the other two interfaces of the tee 8 are connected to the air inlet pipe 1 and the air inlet pipe 2 respectively. The other ends of the air inlet pipe 1 and the air inlet pipe 2 are connected to the air inlet end of the shuttle valve 4. A two-position three-way reversing valve 7 is installed on the pipeline of the air inlet pipe 1, and a pressure reducing valve 1 5 is installed on the pipeline of the air inlet pipe 2. The air outlet end of the shuttle valve 4 is connected to the air inlet end of the three-position five-way reversing valve 6. The air outlet end of the three-position five-way reversing valve 6 is respectively connected to the closing air outlet pipe and the opening air outlet pipe. The closing air outlet pipe and the opening air outlet pipe are respectively connected to two branch pipes. The two branches of the closing air outlet pipe They are respectively connected to the closing air inlet of the left cylinder 2 and the right cylinder 3 of the automatic door. The two branches of the door opening air outlet pipe are respectively connected to the opening air inlet of the left cylinder 2 and the right cylinder 3 of the automatic door. The closing air inlet of the left cylinder 2 and the automatic door right cylinder 3 are connected to the door closing one-way throttle valve 1 9 and the closing one-way throttle valve 2 12 on the corresponding two branches. The opening air inlet of the left cylinder 2 and the automatic door right cylinder 3 are respectively connected to the door opening one-way throttle valve 10 and the door opening one-way throttle valve 2 11 on the corresponding two branches. The output end of the PLC controller is electrically connected to the three-position five-way reversing valve 6 and the two-position three-way reversing valve 7. The air inlet end provides a standard air supply with an air pressure of 6 bar. An air source triplex 1 is provided on the air inlet pipe of the air inlet end. The air source triplex 1 includes a pressure reducing valve 2, an air filter and an oil mist collector connected in sequence. Both the 5 / 3-way directional valve 6 and the 3 / 2-way directional valve 7 are solenoid valves. The 3 / 2-way directional valve 7 houses a built-in solenoid valve YA1, while the 5 / 3-way directional valve 6 houses a built-in solenoid valve YA2 and a solenoid valve YA3. These solenoid valves YA2 and YA3 are used to switch the air outlet of the 5 / 3-way directional valve 6. The closed air outlet pipe is connected between the closed air inlet of the solenoid valve YA2, while the open air outlet pipe is connected between the open air inlet of the solenoid valve YA3. The air supply from the second air inlet pipe passes through the pressure reducing valve 1 5 to a pressure of 3-4 bar.

[0037] Analysis of the above content: During use, the PLC controller controls the on / off switching of the three-position five-way reversing valve 6 and the two-position three-way reversing valve 7. The air source triplex 1 provides clean, stable airflow to the control circuit. The air from the air source triplex 1 is divided into two paths by the three-way valve 8. One path passes through the pressure reducing valve 5 to become a low-pressure air path, and the other path flows to the two-position three-way reversing valve 7 to form high-pressure air. The low-pressure air path and the high-pressure air path flow through the shuttle valve 4 to the three-position five-way reversing valve 6 to control the opening and closing of the left cylinder 2 of the automatic door.

[0038] When the gas source is ventilated for the first time, the solenoid valve YA1 of the two-position three-way reversing valve 7 is not energized, the high-pressure gas is in the disconnected state, and the low-pressure gas is passed to the three-position five-way reversing valve 6 through the shuttle valve 4. When the solenoid valve YA2 of the three-position five-way reversing valve 6 is energized and the solenoid valve YA3 is de-energized, the left cylinder 2 and the right cylinder 3 of the automatic door are supplied with air to the closing air inlet end, and the automatic door slowly closes.

[0039] After closing is completed, the solenoid valve YA2 of the three-position five-way reversing valve 6 loses power and the solenoid valve YA3 is energized, the door opening one-way throttle valve 10 and the door opening one-way throttle valve 2 11 supply air to the door opening air inlet end, and the automatic door slowly opens.

[0040] After opening is complete, solenoid valve YA1 of the two-position, three-way directional valve 7 is energized. High-pressure air then flows to shuttle valve 4, closing the low-pressure air path and feeding it to the three-position, five-way directional valve 6. Solenoid valve YA2 of the three-position, five-way directional valve 6 is energized, while solenoid valve YA3 is de-energized, causing the automatic door to rapidly close. After closing is complete, solenoid valve YA3 of the three-position, five-way directional valve 6 is energized, while solenoid valve YA2 is de-energized, causing the automatic door to rapidly open. This completes the soft start of the pneumatic automatic door.

[0041] Example 2: Please refer to Figure 1-2 The present invention provides a technical solution: The specific operating steps of the cylinder automatic door soft start control method are as follows:

[0042] S1: The air inlet provides a stable pressure gas source, and the tee 8 divides the air source at the air inlet into two gas paths: low pressure and high pressure;

[0043] The low-pressure gas circuit is supplied with reduced pressure through a pressure reducing valve 5, and the high-pressure gas circuit is controlled on and off by a two-position three-way reversing valve 7;

[0044] S2: The shuttle valve 4 is controlled by an OR gate, which combines the low-pressure and high-pressure gas paths, or the high-pressure gas path is discharged from the outlet of the shuttle valve 4, or the low-pressure gas path is discharged from the outlet of the shuttle valve 4;

[0045] S3: The three-position five-way reversing valve 6 controls the air supply to the rodless chamber or rod chamber of the automatic door left cylinder 2 or the automatic door right cylinder 3 to inflate;

[0046] The closing one-way throttle valve 1 9 and the closing one-way throttle valve 2 12 respectively control the rod chamber or the rod chamber exhaust throttling of the automatic door left cylinder 2 and the automatic door right cylinder 3; the opening one-way throttle valve 10 and the opening one-way throttle valve 2 11 respectively control the rod chamber or the rod chamber exhaust throttling of the automatic door left cylinder 2 and the automatic door right cylinder 3;

[0047] S4: When the automatic door is started for the first time, the low-pressure air circuit is used to slowly open and close the automatic door to complete the first opening and closing action of the automatic door. A back pressure is formed in the automatic door left cylinder 2, the automatic door right cylinder 3 and the pipeline, and then the high-pressure air circuit is introduced to control the opening and closing of the automatic door.

[0048] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure signs in the claims should not be regarded as limiting the claims involved.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A cylinder automatic door soft start control method, the cylinder automatic door soft start control method is based on a cylinder automatic door soft start control device, the cylinder automatic door soft start control device comprises: Air inlet, three-way valve (8), shuttle valve (4), three-position five-way reversing valve (6), automatic door left cylinder (2), automatic door right cylinder (3), one-way throttle valve and PLC controller; The air inlet end is connected to one interface of the tee (8) through the air inlet pipe, and the other two interfaces of the tee (8) are connected to the air inlet pipe 1 and the air inlet pipe 2 respectively, and the other ends of the air inlet pipe 1 and the air inlet pipe 2 are connected to the air inlet end of the shuttle valve (4); A two-position three-way reversing valve (7) is installed on the pipeline of the air intake pipe 1, and a pressure reducing valve 1 (5) is installed on the pipeline of the air intake pipe 2; The air outlet end of the shuttle valve (4) is connected to the air inlet end of the three-position five-way reversing valve (6), and the air outlet end of the three-position five-way reversing valve (6) is respectively connected to the door closing air outlet pipe and the door opening air outlet pipe, and the door closing air outlet pipe and the door opening air outlet pipe are respectively connected to two branch pipes, and the two branch pipes of the door closing air outlet pipe are respectively connected to the door closing air inlet end of the automatic door left cylinder (2) and the automatic door right cylinder (3), and the two branch pipes of the door opening air outlet pipe are respectively connected to the door opening air inlet end of the automatic door left cylinder (2) and the automatic door right cylinder (3); The closing air inlet ends of the automatic door left cylinder (2) and the automatic door right cylinder (3) are connected to the closing one-way throttle valve 1 (9) and the closing one-way throttle valve 2 (12) on two corresponding branch pipes, and the opening air inlet ends of the automatic door left cylinder (2) and the automatic door right cylinder (3) are connected to the opening one-way throttle valve 1 (10) and the opening one-way throttle valve 2 (11) on two corresponding branch pipes. The output end of the PLC controller is electrically connected to the three-position five-way reversing valve (6) and the two-position three-way reversing valve (7); It is characterized in that: the specific operating steps of the cylinder automatic door soft start control method are as follows: S1: The air inlet provides a stable pressure gas source, and the three-way (8) divides the air source at the air inlet into two air paths: low pressure and high pressure; The low-pressure gas path is reduced in pressure by the pressure reducing valve 1 (5), and the high-pressure gas path is controlled on and off by the two-position three-way reversing valve (7); S2: The shuttle valve (4) is controlled by an OR gate, which combines the low-pressure and high-pressure gas paths, or the high-pressure gas path is discharged from the outlet of the shuttle valve (4), or the low-pressure gas path is discharged from the outlet of the shuttle valve (4); S3: The three-position five-way reversing valve (6) controls the air supply to the rodless chamber or rod chamber of the automatic door left cylinder (2) or the automatic door right cylinder (3); The first one-way throttle valve for closing the door (9) and the second one-way throttle valve for closing the door (12) respectively control the rod chamber or the exhaust throttle of the rod chamber of the left cylinder (2) and the right cylinder (3) of the automatic door; the first one-way throttle valve for opening the door (10) and the second one-way throttle valve for opening the door (11) respectively control the exhaust throttle of the rod chamber or the rod chamber of the left cylinder (2) and the right cylinder (3) of the automatic door; S4: When the automatic door is started for the first time, the low-pressure air circuit is used to slowly open and close the automatic door to complete the first opening and closing action of the automatic door. A back pressure is formed in the automatic door left cylinder (2), the automatic door right cylinder (3) and the pipeline, and then the high-pressure air circuit is introduced to control the opening and closing of the automatic door.

2. A cylinder automatic door soft start control method according to claim 1, characterized in that: The air inlet end provides a standard air supply with a pressure of 6 bar.

3. The method for controlling the soft start of an automatic cylinder door according to claim 1, characterized in that: An air source triplex (1) is provided on the air intake pipe at the air intake end.

4. A cylinder automatic door soft start control method according to claim 3, characterized in that: The air source triplex (1) comprises a second pressure reducing valve, an air filter and an oil mist collector which are connected in sequence.

5. The method for controlling the soft start of a cylinder automatic door according to claim 1, characterized in that: The three-position five-way directional valve (6) and the two-position three-way directional valve (7) are both electromagnetic valves. The two-position three-way directional valve (7) is a valve with a built-in electromagnetic valve YA1. The three-position five-way directional valve (6) is a valve with a built-in electromagnetic valve YA2 and a electromagnetic valve YA3. The electromagnetic valve YA2 and the electromagnetic valve YA3 are used to switch the air outlet of the three-position five-way directional valve (6). The closed air outlet pipe is connected between the electromagnetic valve YA2 and the closed air inlet end, and the open air outlet pipe is connected between the electromagnetic valve YA3 and the open air inlet end.

6. The method for controlling the soft start of a cylinder automatic door according to claim 1, characterized in that: The air supply output from the second air inlet pipe has an air pressure of 3 bar to 4 bar after passing through the first pressure reducing valve (5).

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