Pneumatic control device

Abstract

The utility model relates to the technical field of pneumatic control equipment, and provides a pneumatic control device which comprises a first pneumatic control travel switch, a first air valve, a second pneumatic control travel switch, a first airflow channel and a second airflow channel. The first air valve is a two-position three-way valve; the first air flow channel is communicated with the first air control travel switch and an air source port of the first air valve; and the second airflow channel is communicated with the second pneumatic travel switch and a control port of the first air valve.

Description

Technical Field

[0001] This utility model belongs to the technical field of pneumatic control equipment, and more specifically, it relates to a pneumatic control device. Background Technology

[0002] In modern automobile or electromechanical equipment manufacturing processes, trolleys used for transporting workpieces often need to move or be raised and lowered. During these position changes, limit switches are typically used to determine whether the trolley has reached its limit position. When multiple limit positions need to be determined, a separate limit switch is installed at each position. The triggering status of these multiple limit switches is generally determined by a control unit (such as a PLC) that transmits electrical signals before executing the next action. However, this process of transmitting signals through separate circuits for each limit switch is very complex and prone to failure. Utility Model Content

[0003] The purpose of this utility model is to provide a pneumatic control device to solve the technical problem in the prior art where the transmission of each limit switch through a circuit is very complex and prone to failure.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a pneumatic control device, comprising:

[0005] First pneumatic limit switch;

[0006] First air valve; the first air valve is: a two-position three-way valve;

[0007] Second pneumatic limit switch;

[0008] First airflow channel; the first airflow channel is connected to the air source port of the first pneumatic limit switch and the first air valve;

[0009] The second airflow channel is connected to the control port of the second pneumatic limit switch and the first air valve.

[0010] Furthermore, it also includes: a first control valve; the number of the first pneumatic limit switches is multiple; the multiple first pneumatic limit switches are respectively connected to different input ports on the first control valve, and the output port of the first control valve is connected to the first airflow channel.

[0011] Furthermore, it also includes:

[0012] Third pneumatic limit switch;

[0013] The second air valve is a two-position three-way valve.

[0014] Fourth pneumatic limit switch;

[0015] The third airflow channel; the third airflow channel is connected to the air source port of the third pneumatic limit switch and the second air valve;

[0016] The fourth airflow channel; the fourth airflow channel is connected to the control port of the fourth pneumatic limit switch and the second air valve;

[0017] The first or valve; the working port of the first air valve and the working port of the second air valve are respectively connected to the input port of the second or valve.

[0018] Furthermore, it also includes: a second valve; the number of the third pneumatic limit switches is multiple; the multiple first pneumatic limit switches are respectively connected to different input ports on the second valve, and the output port of the second valve is connected to the third airflow channel.

[0019] Furthermore, it also includes:

[0020] The second OR valve; the second airflow channel and the fourth airflow channel are respectively connected to different input ports on the second OR valve;

[0021] The third air valve; the third air valve is a two-position three-way valve;

[0022] The fourth air valve; the fourth air valve is a two-position five-way valve;

[0023] Gas source channel; the gas source channel is connected to a gas source;

[0024] Wherein, the output port of the first OR valve is connected to the first control port of the fourth air valve; the output port of the second OR valve is connected to the air source port of the third air valve; the output port of the first OR valve is connected to the control port of the third air valve; the working port of the third air valve is connected to the second control port of the fourth air valve; and the air source channel is connected to the air source port of the fourth air valve.

[0025] Furthermore, it also includes:

[0026] The fifth air valve; the fifth air valve is a two-position five-way single air-controlled valve;

[0027] The working port of the first air valve is connected to the control port of the fifth air valve; the air source channel is connected to the air source port of the fifth air valve.

[0028] Furthermore, it also includes: a clamping cylinder;

[0029] The first and second working ports of the fourth air valve are respectively connected to the clamping cylinder.

[0030] Furthermore, the number of clamping cylinders is multiple.

[0031] Furthermore, it also includes: a pneumatic buzzer; the pneumatic buzzer is connected to the first working port and / or the second working port of the fourth air valve respectively.

[0032] Furthermore, the number of the pneumatic buzzers is multiple.

[0033] The beneficial effects of the pneumatic control device provided by this utility model are as follows: Compared with the prior art, the pneumatic control device provided by this utility model has a first air valve that is a two-position three-way valve; a first pneumatic control limit switch is connected to the air source port of the first air valve through a first airflow channel; if the first pneumatic control limit switch is triggered, the first pneumatic control limit switch can inject gas at a first predetermined pressure into the air source port of the first air valve through the first airflow channel; if the first pneumatic control limit switch is not triggered, no gas is injected into the air source port of the first air valve; a second pneumatic control limit switch is connected to the control port of the first air valve through a second airflow channel; if the second pneumatic control limit switch is triggered, the second pneumatic control limit switch can... The second airflow channel injects gas at a second predetermined pressure into the control port of the first air valve; if the second pneumatic limit switch is not triggered, no gas is injected into the control port of the first air valve; that is, the user can control whether gas is injected into the air source port of the first air valve through the first pneumatic limit switch, and the user can control whether gas is injected into the control port of the first air valve through the second limit switch; when gas is injected into the control port and air source port of the first air valve respectively, the working port of the first air valve can output gas for the user to use or control other pneumatic components; the first pneumatic limit switch, the second limit switch and the first air valve are all directly connected by air circuits, the structure is simple and not prone to failure. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the pneumatic control device provided in an embodiment of the present utility model;

[0035] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0036] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0037] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0038] Figure 5 for Figure 1 Enlarged view of point D;

[0039] Figure 6 for Figure 1 Enlarged view of point E in the middle;

[0040] Figure 7A schematic diagram illustrating the connection between the pneumatic control device and the pneumatic buzzer provided in an embodiment of this utility model;

[0041] Figure 8 A schematic diagram of the interface of the two-position three-way valve provided in the embodiment of this utility model;

[0042] Figure 9 This is a schematic diagram of the interface of a two-position five-way valve provided in an embodiment of the present utility model.

[0043] The following are the labeling elements in the figure:

[0044] 11-First pneumatic limit switch; 12-Second pneumatic limit switch; 13-Third pneumatic limit switch; 14-Fourth pneumatic limit switch; 21-First air valve; 22-Second air valve; 23-Third air valve; 24-Fourth air valve; 25-Fifth air valve; 31-First airflow channel; 32-Second airflow channel; 33-Third airflow channel; 34-Fourth airflow channel; 41-First AND valve; 42-Second AND valve; 51-First OR valve; 52-Second OR valve; 6-Air source channel; 71-Clamping cylinder; 72-Pneumatic buzzer. Detailed Implementation

[0045] It should be noted that the specific embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0046] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Here, A and B can be singular or plural, respectively.

[0047] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" or "attached to" another component, it can be directly connected to or indirectly connected to that other component. When a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component.

[0048] It should be noted that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0050] It should be noted that the term "multiple" means two or more, unless otherwise explicitly specified.

[0051] Please refer to the following: Figures 1 to 9 The pneumatic control device provided by this utility model will now be described. The pneumatic control device includes: a first pneumatic limit switch 11, a first air valve 21, a second pneumatic limit switch 12, and a second airflow channel 32. The first air valve 21 is a two-position three-way valve. The first airflow channel 31 connects the air source ports of the first pneumatic limit switch 11 and the first air valve 21. The second airflow channel 32 connects the control ports of the second pneumatic limit switch 12 and the first air valve 21.

[0052] Thus, the first air valve 21 is a two-position three-way valve; the first pneumatic limit switch 11 is connected to the air source port of the first air valve 21 through the first airflow channel 31; if the first pneumatic limit switch 11 is triggered, the first pneumatic limit switch 11 can inject gas at a first predetermined pressure into the air source port of the first air valve 21 through the first airflow channel 31; if the first pneumatic limit switch 11 is not triggered, no gas is injected into the air source port of the first air valve 21; the second pneumatic limit switch 12 is connected to the control port of the first air valve 21 through the second airflow channel 32; if the second pneumatic limit switch 12 is triggered, the second pneumatic limit switch 12 can inject gas at a first predetermined pressure into the air source port of the first air valve 21 through the second airflow channel 32. The control port of the first air valve 21 is injected with gas at a second predetermined pressure. If the second pneumatic limit switch 12 is not triggered, no gas is injected into the control port of the first air valve 21. That is, the user can control whether gas is injected into the air source port of the first air valve 21 through the first pneumatic limit switch 11, and the user can control whether gas is injected into the control port of the first air valve 21 through the second limit switch. After gas is injected into the control port and the air source port of the first air valve 21 respectively, the working port of the first air valve 21 can output gas for the user to use or control other pneumatic components. The first pneumatic limit switch 11, the second limit switch and the first air valve 21 are all directly connected by air circuits, with a simple structure and not prone to failure.

[0053] In one embodiment, the upstream of the first pneumatic limit switch 11 is connected to an external air source.

[0054] In one embodiment, the upstream of the second pneumatic limit switch 12 is connected to an external air source.

[0055] In one embodiment, it further includes: a first gas source; the first gas source is connected to the gas source port of the first gas valve 21.

[0056] In one embodiment, it further includes: a first gas source; the first gas source is connected to the gas source port of the second gas valve 22.

[0057] Further, please refer to Figures 1 to 9 As a specific embodiment of the pneumatic control device provided by this utility model, it further includes: a first connecting valve 41; a plurality of first pneumatic limit switches 11; the plurality of first pneumatic limit switches 11 are respectively connected to different input ports on the first connecting valve 41, and the output port of the first connecting valve 41 is connected to the first airflow channel 31. In this way, the plurality of first pneumatic limit switches 11 can be connected to the first airflow channel 31 through the first connecting valve 41.

[0058] Further, please refer to Figures 1 to 9As a specific embodiment of the pneumatic control device provided by this utility model, it further includes: a third pneumatic limit switch 13, a second air valve 22, a fourth pneumatic limit switch 14, a third airflow channel 33, a fourth airflow channel 34, and a first OR valve 51; the second air valve 22 is a two-position three-way valve; the third airflow channel 33 connects to the air source ports of the third pneumatic limit switch 13 and the second air valve 22; the fourth airflow channel 34 connects to the control ports of the fourth pneumatic limit switch 14 and the second air valve 22; the working port of the first air valve 21 is connected to one input port of the second OR valve 52, and the second air valve 22 is connected to the other input port of the second OR valve 52. Thus, when (the first pneumatic limit switch 11 is triggered and the second limit switch is triggered) or (the third pneumatic limit switch 13 is triggered and the fourth pneumatic limit switch 14 is triggered), the output port of the first OR valve 51 can output gas.

[0059] Further, please refer to Figures 1 to 9 As a specific embodiment of the pneumatic control device provided by this utility model, it further includes: a second valve 42; a plurality of third pneumatic control limit switches 13; and multiple first pneumatic control limit switches 11 respectively connected to different input ports on the second valve 42, with the output port of the second valve 42 connected to the third airflow channel 33. Thus, multiple third limit control switches can be connected to the third airflow channel 33 through the second valve 42.

[0060] Further, please refer to Figures 1 to 9 As a specific embodiment of the pneumatic control device provided by this utility model, it further includes: a second OR valve 52, a third air valve 23, a fourth air valve 24, and an air source channel 6; the second air flow channel 32 and the fourth air flow channel 34 are respectively connected to different input ports on the second OR valve 52; the fourth air valve 24 is a two-position three-way valve; the fifth air valve 25 is a two-position five-way valve; the air source channel 6 is connected to an air source; wherein, the output port of the first OR valve 51 is connected to the first control port of the fourth air valve 24; the output port of the second OR valve 52 is connected to the air source port of the third air valve 23; the output port of the first OR valve 51 is connected to the control port of the third air valve 23; the working port of the third air valve 23 is connected to the second control port of the fourth air valve 24; and the air source channel 6 is connected to the air source port of the fourth air valve 24. Thus, when gas is injected into the first control port of the fourth gas valve 24 from the output end of the first or valve 51, the first working port of the fourth gas valve 24 outputs gas to the outside; when gas is injected into the second control port of the fourth gas valve 24 from the working port of the third gas valve 23, the second working port of the fourth gas valve 24 outputs gas to the outside.

[0061] Further, please refer to Figures 1 to 9As a specific embodiment of the pneumatic control device provided by this utility model, it further includes: a fifth air valve 25; the fifth air valve 25 is a two-position five-way single air control valve; wherein, the working port of the first air valve 21 is connected to the control port of the fifth air valve 25; the air source channel 6 is connected to the air source port of the fifth air valve 25. Thus, the working port of the first air valve 21 can control the working port of the fifth air valve 25 by injecting into the control port of the fifth air valve 25.

[0062] Further, please refer to Figures 1 to 9 As a specific embodiment of the pneumatic control device provided by this utility model, it further includes: a clamping cylinder 71; the first working port and the second working port of the fourth air valve 24 are respectively connected to the clamping cylinder 71. Thus, the fourth air valve 24 can control the clamping cylinder 71 through the first working port and the second working port.

[0063] Further, please refer to Figures 1 to 9 As a specific embodiment of the pneumatic control device provided by this utility model, there are multiple clamping cylinders 71. In this way, multiple clamping cylinders 71 can clamp different positions on the workpiece.

[0064] Further, please refer to Figures 1 to 9 As a specific embodiment of the pneumatic control device provided by this utility model, it further includes: a pneumatic buzzer 72; the pneumatic buzzer 72 is connected to the first working port and / or the second working port of the fourth air valve 24 respectively. In this way, the first working port and / or the second working port of the fourth air valve 24 can drive the buzzer to activate and remind the user.

[0065] Further, please refer to Figures 1 to 9 As one specific embodiment of the pneumatic control device provided by this utility model, there are multiple pneumatic buzzers 72. Thus, multiple buzzers can increase the intensity of the alert.

[0066] First embodiment:

[0067] In one embodiment, regarding the "pneumatic limit switch":

[0068] Working principle of purely mechanical pneumatic limit switches:

[0069] 【1】Structure and installation of pneumatic limit switches:

[0070] Purely mechanical pneumatic limit switches typically include a mechanical arm or lever that is actuated when it comes into contact with a moving part of a mechanical system.

[0071] Such switches are typically installed at critical locations in pneumatic systems, such as the end of a cylinder or along the path of a moving device, to ensure that they are triggered when a specific position is reached.

[0072] [2] Mechanical triggering process:

[0073] When the moving part of the pneumatic system (such as the cylinder piston) reaches the end of its operation, it will directly push or impact the mechanical arm of the pneumatic limit switch.

[0074] This mechanical action causes the switch arm to move, which in turn triggers the control mechanism connected to the gas valve.

[0075] 【3】Mechanical connection for controlling valves:

[0076] Pneumatic limit switches are directly connected to air valves via mechanical connections such as mechanical linkages, push rods, or cables.

[0077] When the switch is triggered, the movement of its robotic arm is transmitted through these mechanical connections, causing the valve to open or close.

[0078] 【4】Operation of the air valve:

[0079] In most designs, a pneumatic valve may be a simple gate valve or ball valve that is connected to a switch via a mechanical connection (such as a rod or cable).

[0080] The movement of the switch arm is converted into a valve opening and closing action, directly controlling the flow of air. When open, gas flows from the compressed air source through the valve to the actuator (such as a cylinder) to perform the required action; when closed, the airflow is blocked, stopping the action or maintaining the current state.

[0081] 【4】Automatic Reset:

[0082] Typically, this type of pneumatic limit switch automatically returns to its original position by spring force or gravity when the moving part returns to its initial position, ready for the next trigger.

[0083] Second embodiment:

[0084] In one embodiment, regarding another type of "pneumatic limit switch" involving electronic control:

[0085] 【1】Installation and connection of pneumatic limit switches:

[0086] Pneumatic limit switches are typically installed in critical locations in pneumatic systems, such as cylinders, sliders, or other moving parts.

[0087] The switch is connected to the solenoid valve of the pneumatic valve via electrical cables or directly to the control system (such as a programmable logic controller, PLC).

[0088] [2] Mechanical triggering:

[0089] When a moving part in a pneumatic or mechanical system reaches the end of its predetermined stroke, it will contact a pneumatic limit switch. This contact can be direct physical contact or it can be achieved through contactless methods such as proximity sensors.

[0090] When the switch is triggered, the internal contacts close, forming a circuit connection.

[0091] Signal transmission:

[0092] After the switch is closed, it transmits an electrical signal to the downstream solenoid valve. This signal can be the current that directly starts the solenoid valve, or a control signal sent to the PLC, which further processes the signal to control the solenoid valve.

[0093] Solenoid valve operation:

[0094] Upon receiving a signal, the solenoid valve responds to the switch trigger, changing the position of its internal valve core. Solenoid valves typically have two states: energized and de-energized. When energized, the valve core is attracted by electromagnetic force, altering the original airflow path.

[0095] When energized, the solenoid valve allows air to pass through the valve to a pneumatic actuator, such as a cylinder or motor, thereby executing an opening or action command.

[0096] [3] Pneumatic actuation:

[0097] When the solenoid valve is opened, compressed air flows through the valve to the pneumatic actuator, such as a cylinder, causing its piston rod to push or pull, performing the required mechanical action (such as pushing a slider to move or opening and closing a robotic arm).

[0098] 【4】Automatic Reset:

[0099] Once the moving part has completed its action and returned to the starting position, the pneumatic limit switch will be reset, ready for the next trigger.

[0100] Third embodiment:

[0101] In one embodiment, regarding a "two-position five-way valve":

[0102] [1] Interface of a two-position five-way valve

[0103] (1) Gas source port (P-Pressure)

[0104] Definition: An air source port is an interface connected to a compressed air source, providing the necessary compressed air for valves and pneumatic systems.

[0105] Function: Primarily supplies compressed air to drive valves and connected pneumatic equipment.

[0106] (2) Control ports (C1, C2) [In one embodiment, C1 is the first control port of the two-position five-way valve, and C2 is the second control port of the two-position five-way valve.]

[0107] Definition: The control port receives air pressure signals from other parts and is used to control the switching of valves.

[0108] Function:

[0109] C1 port: When gas is injected into C1, the valve switches to position 1.

[0110] C2 port: When gas is injected into C2, the valve switches to position 2.

[0111] (3) Working ports (A, B) [In one embodiment, A is the first working port of the two-position five-way valve, and B is the second working port of the two-position five-way valve.]

[0112] Definition: The working port is connected to a cylinder or other pneumatic actuator.

[0113] Function:

[0114] Port A: In one state of the valve, air is supplied to one side of the cylinder.

[0115] Port B: In another state of the valve, air is supplied to the other side of the cylinder.

[0116] (4) Exhaust ports (E1 and E2):

[0117] Definition: The exhaust port is used to release air from the cylinder so that the cylinder can move or stop smoothly.

[0118] Function:

[0119] Port E1: This is the exhaust port, usually connected to port A, used to release air from the cylinder on the port A side when port A is closed.

[0120] Port E2: This is the exhaust port, usually connected to port B, used to release air from the cylinder on the port B side when port B is closed.

[0121] [2] Working principle of a two-position five-way valve

[0122] The 2-position 5-way valve controls the extension and retraction of the cylinder by controlling the airflow from the air source port to the working port and the exhaust from the corresponding working port. Activation of the purely pneumatic control port allows for valve switching without the need for a power source.

[0123] Position 1 (when C1 is activated):

[0124] Airflow path:

[0125] P→A: The air source is sent into port A through port P, and air is supplied to one side of the cylinder, pushing the piston to move in one direction.

[0126] B→E2: The cylinder chamber connected to port B exhausts through port E2, and the auxiliary piston moves towards port A.

[0127] Position 2 (when C2 is activated):

[0128] Airflow path:

[0129] P→B: The air source is sent into port B through port P, and the other side of the cylinder is filled with air, pushing the piston to move in the opposite direction.

[0130] A→E1: The cylinder chamber connected to port A exhausts through port E1, and the auxiliary piston moves towards port B.

[0131] Switching Example:

[0132] Activate C1:

[0133] P→A;

[0134] B→E2;

[0135] Activate C2:

[0136] P→B;

[0137] A→E1;

[0138] Fourth embodiment:

[0139] In one embodiment, the two-position five-way valve used in this application can be such that when air pressure is input from one control port of the valve, air pressure is output from one output port of the valve; when air pressure is input from the other control port of the valve, air pressure is output from the other output port of the valve.

[0140] The following is a detailed description of this configuration:

[0141] Valve configuration:

[0142] P (Air Source Port): Connected to compressed air or other air sources.

[0143] A and B (output ports): These are typically connected to the actuator, such as the two ends of a cylinder.

[0144] EA and EB (exhaust ports): These are used to allow air to be vented from the corresponding part of the actuator when the valve is switched.

[0145] C1 and C2 (control ports): Receive control air pressure signals.

[0146] Working principle:

[0147] When air pressure is input from control port C1: the internal mechanism of the valve responds to the control air pressure of C1, causing the valve to switch to a state in which the air source port P is connected to the output port A, allowing air pressure to be output from A, and at the same time connecting the output port B and the corresponding exhaust port EB, allowing the gas at the B end to be discharged.

[0148] When air pressure is input from control port C2: the valve responds to the control air pressure of C2 and switches to another state. In this state, the air source port P is connected to the output port B, allowing air pressure to be output from B. At the same time, the output port A and the corresponding exhaust port EA are connected, allowing the gas at end A to be discharged.

[0149] Fifth embodiment:

[0150] In one embodiment, regarding the "2-position, 5-way, single-pilot pneumatic valve": A 2-position, 5-way, single-pilot pneumatic valve is a common pneumatic control valve widely used in automation and robotics, particularly for controlling the movement of pneumatic actuators such as cylinders and pneumatic motors. This type of valve uses pneumatic signals to control the movement of the valve core, thereby changing the connection state of the output port. The following is a detailed explanation of its working principle:

[0151] 【1】Structure and composition:

[0152] The "two-position five-way single pneumatic control valve" includes the following main components:

[0153] Air supply port (P): This valve introduces compressed air from the air source.

[0154] Two exhaust ports (EA, EB or R1, R2): used to exhaust the air returning from the actuator.

[0155] Two working ports (A, B): connected to the two ends of a pneumatic actuator (such as a cylinder).

[0156] Single pneumatic control port (Pilot): Receives control signals and controls the movement of the valve core.

[0157] Valve core: It slides within the valve body and changes position according to the signal from the pneumatic control port, thereby selecting the path of gas flow.

[0158] 【2】Working principle:

[0159] (1) Valve core position switching:

[0160] When control air pressure is sent to the control port, the air pressure pushes the valve core to move. This type of valve is usually designed with spring return, meaning that the valve core is pushed back to its original position by spring force after the air pressure signal is lost.

[0161] The valve core has two positions, each of which determines the connection between the air supply port and the working port, as well as the opening and closing of the exhaust port.

[0162] (2) The two working positions of the valve:

[0163] Position 1 (not activated): In this position, the air supply port (P) is connected to a working port (e.g., A), allowing gas to enter one end of the pneumatic actuator; at the same time, another working port (e.g., B) is connected to the corresponding exhaust port (EB), allowing gas to exit from the other end of the pneumatic actuator.

[0164] Position 2 (when activated): When the pneumatic control port receives air pressure, it pushes the valve core to the second position. At this time, the air supply port (P) is connected to another working port (e.g., B), allowing gas to enter the other end of the pneumatic actuator. At the same time, the previously connected working port (A) is now connected to the corresponding exhaust port (EA), allowing the gas at this end of the actuator to be discharged.

[0165] Sixth embodiment:

[0166] In one embodiment, regarding a "two-position three-way valve":

[0167] A 2-position 3-way valve is a commonly used control valve used to switch between two positions, controlling the direction of fluid flow through three connected channels. This type of valve is very common in automation and pneumatic systems, and is especially suitable for applications requiring control of unidirectional flow or switching of airflow paths.

[0168] The detailed working principle of a two-position three-way valve is as follows:

[0169] 【1】Interface Function

[0170] (1) Gas source port (P-Pressure):

[0171] Function: Connects to a compressed air source to provide power to the valve, such as compressed air.

[0172] Usage: The gas source port is the main power source for the valve, responsible for providing the necessary gas to the system.

[0173] (2) Working port (A):

[0174] Function: Connected to pneumatic equipment (such as a single-acting cylinder) to transmit power medium to drive or operate the equipment.

[0175] Usage: When the valve is in a certain position, the working port will receive gas from the gas source port, driving the equipment to perform specific operations.

[0176] (3) Exhaust port (R-Exhaust):

[0177] Function: Used to discharge gases that are no longer needed or to relieve internal pressure in a system; typically connected to the external environment.

[0178] Use: During valve switching operations, the vent releases the pressure in the working port, helping the equipment return to its initial state or maintain its current state.

[0179] (4) Control port (C):

[0180] Function: Receives air pressure signals from other parts to change the valve's state.

[0181] Usage: By changing the pressure state at the control port (the presence or absence of a gas pressure signal), the internal mechanism of the valve (such as the valve core) moves, thereby switching the gas flow direction.

[0182] [2] Working principle

[0183] A purely pneumatic two-position three-way valve controls two different positions through a single control port:

[0184] (1) Position 1 (default position)

[0185] Airflow path:

[0186] When the control port (C) does not receive a pressure signal, the valve is in the default position.

[0187] The P port is connected to the "Working Port (A)" and allows gas to flow from the compressed air source to the cylinder or other equipment to drive the equipment operation.

[0188] The "exhaust port (R)" may be sealed to prevent gas leakage.

[0189] (1) Position 2 (Active State)

[0190] Airflow path:

[0191] When the control port (C) receives a gas pressure signal, the internal mechanism (such as a piston or valve core) moves, changing the direction of gas flow.

[0192] Port P may be connected to "Exhaust Port (R)" to allow pressure release, prevent overpressure damage, or provide a return path for other parts of the system.

[0193] The "working port (A)" may be closed or connected to the environment to prevent new gas from entering, while allowing existing gas to be released through the exhaust port (R).

[0194] Seventh embodiment:

[0195] In one embodiment, the two-position three-way valve used in this application can be such that: when air pressure is input through the control port, the air source does not output gas downstream; when there is no air pressure input through the control port, the air source outputs gas downstream.

[0196] The following is a detailed description of this configuration:

[0197] Air source port (P): Connected to compressed air or other gas sources.

[0198] Working port (A): Connected to downstream equipment or pipelines that require gas.

[0199] Exhaust port (R): Open to the atmosphere or connected to an exhaust system, used to release gas from downstream equipment or pipelines when the valve is closed.

[0200] Control port (C or T): Receives control signals, usually air pressure.

[0201] Working principle:

[0202] When there is air pressure at the control port: When the control port receives air pressure, the mechanical or pneumatic mechanism inside the valve will activate, causing the valve to switch to the closed state. At this time, the gas entering from the air source port is prevented from flowing to the working port, and instead is discharged from the exhaust port, or the valve is directly sealed inside, and the gas cannot flow.

[0203] When there is no air pressure at the control port: When there is no air pressure at the control port, the valve's spring or its own weight will push the valve back to the open state. At this time, the gas from the air source port can flow freely to the working port to supply downstream equipment.

[0204] Eighth embodiment:

[0205] In one embodiment, regarding the "AND valve": an AND valve typically has two input ports and one output port. Each input port is connected to a pneumatic pressure source (e.g., pressure from different control buttons or pneumatic sensors). Only when all input ports receive pneumatic pressure will the internal mechanical structure of the valve move, allowing gas to flow out of the output port. If any input is depressurized, the valve will close the output, preventing gas from flowing through.

[0206] The "AND valve" is used to implement the logical "AND" operation. Its basic function is that the output port will only be activated or allow airflow when all given inputs are satisfied simultaneously.

[0207] Regarding the structure and working principle of the "valve":

[0208] 【1】Structure and composition:

[0209] A valve typically includes the following components:

[0210] Multiple input ports: These ports are used to receive air pressure signals from different air sources or control points.

[0211] One output port: When all input ports simultaneously receive gas pressure that meets the conditions, the gas can flow out from this port.

[0212] Internal valve mechanism: typically includes springs, diaphragms or other mechanical devices, used to control the opening and closing of the output port based on the pressure status of the input port.

[0213] 【2】Working principle:

[0214] (1) Input signal:

[0215] Each input port is connected to a pneumatic source, such as a pneumatic sensor, switch, or other control device.

[0216] The internal mechanism will only be triggered when all input ports receive air pressure. This means that each input must reach a set minimum pressure threshold.

[0217] (2) Internal mechanical operation:

[0218] The valve typically contains a mechanical valve inside, which is acted upon by the pressure at the inlet port.

[0219] Under normal circumstances, the internal valve is continuously pushed to the closed state by a spring, preventing airflow through the output port.

[0220] When the pressure at all input ports is sufficient, these pressures work together to overcome the spring pressure, pushing the valve open. This design ensures that the output port will not open unless all conditions are met.

[0221] (3) Output activation:

[0222] Once the internal valve opens, compressed air can flow out from the output port, activating downstream pneumatic equipment or actuators.

[0223] When the pressure at any input port falls below the threshold, the spring pushes the valve back to its original position, closing the output and stopping the airflow.

[0224] Ninth embodiment:

[0225] In one embodiment, regarding an "OR valve": an OR valve typically also has two or more input ports and one output port. Unlike an OR valve, an OR valve is designed to allow pressure at either input port to actuate an internal mechanism, opening a passage to the output port. The output port will open as long as either input port receives pressure.

[0226] Regarding the "OR valve": In a pneumatic logic system, it is used to implement the logical "OR" operation. Its function is that as long as any input signal meets the condition (i.e., sufficient air pressure is received), the output port will be activated or allow airflow to pass through.

[0227] Regarding the structure and working principle of the "or valve":

[0228] 【1】Structure and composition:

[0229] Or valves typically have the following structure:

[0230] Multiple input ports: These ports are used to receive signals from different gas sources.

[0231] One output port: As long as any input port receives sufficient gas pressure, the gas can flow out from this port.

[0232] Internal valve mechanism: typically includes one or more diaphragms, springs or other mechanical elements, used to control the opening and closing of the output port based on the pressure state of the input port.

[0233] 【2】Working principle:

[0234] (1) Input signal:

[0235] Each input port is connected to a pneumatic source, such as a pneumatic sensor, button, or other control device.

[0236] The internal mechanism will be activated as long as any input port receives sufficient pressure. Not all inputs need to meet the conditions simultaneously; the activity of any single input is enough to trigger the output.

[0237] (2) Internal mechanical operation:

[0238] Alternatively, the internal mechanical design of the valve may allow the activity of a single input to be sufficient to move the valve. Typically, this is achieved through a set of diaphragms or robotic arms controlled by each input port.

[0239] Under normal circumstances, if there is no input pressure, the internal spring will keep the valve in the closed position.

[0240] When the pressure at any input port is sufficient, the corresponding diaphragm or robotic arm will push the valve open, overcoming the resistance of the spring, thereby opening the output port.

[0241] (3) Output activation:

[0242] Once the valve is opened, compressed air can flow out from the output port, thereby activating downstream pneumatic equipment or actuators.

[0243] This output will continue until the pressure at all input ports is no longer sufficient to support the valve's open position.

[0244] Tenth embodiment:

[0245] In one embodiment, the "pneumatic limit switch" can refer to any one of the pneumatic limit switches in Chinese patent publication numbers: CN204312118U, CN203579131U, CN212634747U, CN217402254U, CN114962361A, and CN110434956A.

[0246] In one embodiment, the "two-position three-way valve" can refer to any one of the two-position three-way pneumatic control valves published by Chinese Patent Publication Nos.: CN205877368U, CN201636111U, CN103629421A, CN111750163A, CN201159309Y, and CN203159729U.

[0247] In one embodiment, the "two-position five-way valve" can refer to any one of the following two-position five-way pneumatic control valves published by Chinese Patent Publication Nos.: CN106641314A, CN106239475A, CN108036072A, CN203022655U, CN209036876U, CN204004713U, CN203159729U, CN206280524U, and CN203230455U.

[0248] In one embodiment, the "two-position five-way single air-controlled valve" can refer to any one of the following Chinese patent publication numbers: CN103863352A, CN101323274A, CN110864189A, CN101698412A, CN110578728A, CN220425644U, CN118959682A, CN118896186A, CN205461690U, CN209006329U, and CN2154163Y.

[0249] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A pneumatic control device, characterized in that, include: First pneumatic limit switch; The first air valve is a two-position three-way valve. Second pneumatic limit switch; The first airflow channel; the first airflow channel is connected to the air source port of the first pneumatic limit switch and the first air valve; The second airflow channel is connected to the control port of the second pneumatic limit switch and the first air valve.

2. The pneumatic control device as described in claim 1, characterized in that, Also includes: The first valve; the number of the first pneumatic limit switches is multiple; the multiple first pneumatic limit switches are respectively connected to different input ports on the first valve, and the output port of the first valve is connected to the first airflow channel.

3. The pneumatic control device as described in claim 1, characterized in that, Also includes: Third pneumatic limit switch; The second air valve is a two-position three-way valve. Fourth pneumatic limit switch; The third airflow channel; the third airflow channel is connected to the air source port of the third pneumatic limit switch and the second air valve; The fourth airflow channel; the fourth airflow channel is connected to the control port of the fourth pneumatic limit switch and the second air valve; The first OR valve has its working port connected to one input port of the second OR valve, and the working port of the second OR valve is connected to the other input port of the second OR valve.

4. The pneumatic control device as described in claim 3, characterized in that, Also includes: The second valve; the number of the third pneumatic limit switches is multiple; the multiple first pneumatic limit switches are respectively connected to different input ports on the second valve, and the output port of the second valve is connected to the third airflow channel.

5. The pneumatic control device as described in claim 3, characterized in that, Also includes: The second OR valve; the second airflow channel and the fourth airflow channel are respectively connected to different input ports on the second OR valve; Third air valve; The third air valve is a two-position three-way valve; The fourth air valve; the fourth air valve is a two-position five-way valve; Gas supply channel; The gas source channel is connected to a gas source; Wherein, the output port of the first OR valve is connected to the first control port of the fourth air valve; the output port of the second OR valve is connected to the air source port of the third air valve; the output port of the first OR valve is connected to the control port of the third air valve; the working port of the third air valve is connected to the second control port of the fourth air valve; and the air source channel is connected to the air source port of the fourth air valve.

6. The pneumatic control device as described in claim 5, characterized in that, Also includes: Fifth air valve; The fifth air valve is a two-position five-way single air control valve; The working port of the first air valve is connected to the control port of the fifth air valve; the air source channel is connected to the air source port of the fifth air valve.

7. The pneumatic control device as described in claim 5, characterized in that, Also includes: Clamping cylinder; The first and second working ports of the fourth air valve are respectively connected to the clamping cylinder.

8. The pneumatic control device as described in claim 7, characterized in that, The number of clamping cylinders is multiple.

9. The pneumatic control device as described in claim 5, characterized in that, Also includes: A pneumatic buzzer; the pneumatic buzzer is connected to the first working port and / or the second working port of the fourth air valve respectively.

10. The pneumatic control device as described in claim 9, characterized in that, The number of pneumatic buzzers is multiple.

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