Control device for preventing piston rod of air cylinder with lock from flying out and vehicle body control system

Abstract

The utility model discloses a control device for preventing a piston rod of a cylinder with a lock from flying out and a vehicle body control system, and the control device comprises a first valve with an inlet end connected with a main gas source and an outlet end connected with a first gas path and a second gas path; a first port of the second valve is connected with the first gas circuit, a second port of the second valve is connected with a cylinder rear cavity of the controlled cylinder through a rear cavity valve, and a third port of the second valve is connected with a cylinder front cavity of the controlled cylinder through a front cavity valve; the first end of the logic OR valve is connected with the second port of the second valve, and the second end of the logic OR valve is connected with the third port of the second valve; the first end of the pneumatic control valve is connected with the second gas circuit, the second end of the pneumatic control valve is connected with the gas outlet end of the logic OR valve, and the gas outlet end of the pneumatic control valve is connected with the locking cavity of the piston rod of the controlled cylinder. According to the scheme, the piston rod is prevented from rapidly stretching out under the abnormal condition, the safety of equipment and people is effectively protected, and locking of the air cylinder with the lock at any position can be achieved.

Description

Technical Field

[0001] The present application relates to the field of pneumatic control technology, and in particular to a control device for preventing a piston rod of a locking cylinder from flying out and a vehicle body control system. Background Art

[0002] In various transportation line scenarios, it is often necessary to achieve arbitrary multi-point positioning, emergency stop, etc., and the actuator is a locking cylinder to achieve locking at any position in the middle. However, if locked at any position during the stroke, when one side of the locking cylinder is pressurized, the piston rod of the locking cylinder will extend rapidly when unlocked, which can easily lead to personal injury accidents, equipment damage and other problems. In the prior art, a medium-pressure solenoid valve is used to control the locking cylinder to stop at the middle position, but due to the compressibility of air, accurate and precise positioning of the solenoid valve control method will be difficult, and the sealing between the solenoid valve and the locking cylinder may not be able to guarantee complete leakage for a long time, so it is impossible to maintain the middle stop position for a long time. Therefore, the solenoid valve control middle stop method is difficult to implement. There is an urgent need for a solution that can prevent the piston rod from flying out when unlocking after the locked cylinder is locked at any position. Utility Model Content

[0003] The technical problem to be solved by the utility model is the problem of the piston rod flying out when the locking cylinder is unlocked after being locked at any position in the prior art, and further provides a control device and a vehicle body control system for preventing the piston rod of the locking cylinder from flying out.

[0004] In a first aspect, the technical solution of the present application provides a control device for preventing a piston rod of a locking cylinder from flying out, comprising:

[0005] A first valve, an inlet end of which is connected to a main gas source, and an outlet end of which is connected to a first gas path and a second gas path;

[0006] a second valve, wherein a first port of the second valve is connected to the first gas path, a second port of the second valve is connected to a cylinder rear chamber of a controlled cylinder via a rear chamber valve, and a third port of the second valve is connected to a cylinder front chamber of the controlled cylinder via a front chamber valve;

[0007] a logic or valve, wherein a first end of the logic or valve is connected to a second port of the second valve, and a second end of the logic or valve is connected to a third port of the second valve;

[0008] An air-controlled valve, wherein the first end of the air-controlled valve is connected to the second air path, the second end of the air-controlled valve is connected to the air outlet end of the logic or valve, and the air outlet end of the air-controlled valve is connected to the locking chamber of the piston rod of the controlled cylinder.

[0009] In some schemes, the control device for preventing the piston rod of the locked cylinder from flying out is described, wherein the first valve is a two-position three-way valve, and the control end of the two-position three-way valve is operated to control the connection and disconnection between the main air source and the first air circuit and the second air circuit.

[0010] In some schemes, the control device for preventing the piston rod of the locked cylinder from flying out is configured with a button at the control end of the two-position three-way valve, and triggering the button controls the connection and disconnection between the main air source and the first air circuit and the second air circuit.

[0011] In some schemes, the control device for preventing the piston rod of a locked cylinder from flying out is characterized in that the second valve is a two-position four-way valve; when the two-position four-way valve is in a first conducting position, the rear chamber of the cylinder is connected to the first air path, and the piston rod is extended; when the two-position four-way valve is in a second conducting position, the front chamber of the cylinder is connected to the first air path, and the piston rod is retracted.

[0012] In some schemes, the control device for preventing the piston rod of the locked cylinder from flying out is characterized in that the two-position four-way valve is provided with a handle, and the handle is turned to control the two-position four-way valve to switch between the first conduction position and the second conduction position.

[0013] In some schemes, the control device for preventing the piston rod of the locked cylinder from flying out, the rear chamber valve and the front chamber valve are both flow regulating valves.

[0014] Some schemes describe a control device for preventing the piston rod of a locked cylinder from flying out, wherein the air-controlled valve includes a pilot valve body and a main valve body, the second end of the air-controlled valve is the air inlet end of the pilot valve body, the air inlet end of the pilot valve body opens when air is ventilated at the air outlet end of the logic or valve, and the main valve body unlocks the piston rod after ventilating the locking chamber; the air inlet end of the pilot valve body closes when air is cut off at the air outlet end of the logic or valve, and the main valve body locks the piston rod after stopping ventilating the locking chamber.

[0015] In some schemes, the control device for preventing the piston rod of the locked cylinder from flying out is characterized in that the exhaust ports of the first valve, the second valve and the air-controlled valve are all connected to gas silencing components.

[0016] In a second aspect, the technical solution of the present application provides a vehicle body control system, including a main air source, a control device for preventing the piston rod of a locked cylinder from flying out as described in any technical solution of the first aspect, and a locked cylinder, wherein the locked cylinder serves as a controlled cylinder of the control device.

[0017] In some embodiments of the vehicle body control system, the locking chamber of the piston rod of the locking cylinder unlocks the piston rod when air is ventilated, and locks the piston rod when air is cut off.

[0018] Compared with the existing technical solutions, the above technical solutions of this application have the following technical effects:

[0019] The control device and vehicle body control system for preventing the piston rod of the locked cylinder from flying out provided by the present application, wherein the control device includes a first valve for controlling the on-off of the main gas source. Combined with the second valve, the logic or valve controls the pressure balance of the cylinder front chamber and the cylinder rear chamber of the controlled cylinder, and realizes the synchronous action of the gas control valve and the gas passage of the cylinder front chamber and the cylinder rear chamber by whether the gas control valve is connected with the logic or valve and the gas passage of the cylinder front chamber or the cylinder rear chamber, and can control the locking chamber to unlock when the cylinder front chamber and the cylinder rear chamber are driven, so as to avoid abnormal unlocking of the piston rod. Thus, the rapid extension of the piston rod under abnormal conditions is avoided, and the safety of equipment and personnel is effectively protected. Moreover, since the present application adopts pure pneumatic control, the locking of the locked cylinder at any position can be realized. Since the solenoid valve is no longer used, the poor sealing between the solenoid valve and the gas path is also avoided. While the locking accuracy is improved, the device also has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the connection relationship between the control device for preventing the piston rod of a locked cylinder from flying out and the controlled cylinder provided in an embodiment of the present application;

[0021] The meanings of the reference numerals are as follows:

[0022] 1-first valve, 2-second valve, 3-1-rear chamber valve, 3-2-front chamber valve, 4-logic OR valve, 5-gas control valve, 6-gas silencer component, 100-controlled cylinder, 101-cylinder rear chamber, 102-cylinder front chamber, 103-locking chamber, 104-piston rod. DETAILED DESCRIPTION

[0023] The specific implementation of the present application is further described below with reference to the accompanying drawings.

[0024] It is easy to understand that according to the technical solution of the present application, without changing the essential spirit of the present application, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the entirety of the present application or as a limitation or restriction on the technical solution of the application.

[0025] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0026] This embodiment provides a control device to prevent the piston rod of the locking cylinder from flying out, such as Figure 1 As shown, the control device includes a first valve 1, a second valve 2, a rear chamber valve 3-1, a front chamber valve 3-2, a logic or valve 4 and a gas control valve 5. Specifically, the inlet end of the first valve 1 is connected to the main gas source, and the outlet end thereof is connected to the first gas path and the second gas path; the first port of the second valve 2 is connected to the first gas path, the second port of the second valve 2 is connected to the cylinder rear chamber 101 of the controlled cylinder 100 via the rear chamber valve 3-1, and the third port of the second valve 2 is connected to the cylinder front chamber 102 of the controlled cylinder 100 via the front chamber valve 3-2; the first end of the logic or valve 4 is connected to the second port of the second valve 2, and the second end of the logic or valve 4 is connected to the third port of the second valve 2; the first end of the gas control valve 5 is connected to the second gas path, the second end of the gas control valve 5 is connected to the gas outlet end of the logic or valve 4, and the gas outlet end of the gas control valve 5 is connected to the locking chamber 103 of the piston rod of the controlled cylinder.

[0027] In the above scheme, the control device includes a first valve 1 for controlling the on and off of the main gas source. Combined with the second valve 2 and the logic or valve 4, the pressure balance of the cylinder front chamber 102 and the cylinder rear chamber 101 of the controlled cylinder is controlled. The gas control valve 5 is synchronized with the gas passages of the cylinder front chamber 102 and the cylinder rear chamber 101 by checking whether the gas control valve 5 is connected with the logic or valve 4 and the gas passages of the cylinder front chamber 102 or the cylinder rear chamber 101. When the cylinder front chamber 102 and the cylinder rear chamber 101 are driven, the locking chamber 103 can be controlled to unlock, thereby avoiding abnormal unlocking of the piston rod 104. Thus, the rapid extension of the piston rod 104 under abnormal conditions is avoided, effectively protecting the safety of equipment and personnel. Moreover, since the present application adopts pure pneumatic control, the locking of the locked cylinder at any position can be realized. Since the solenoid valve is no longer used, the poor sealing between the solenoid valve and the gas passage is avoided. While the locking accuracy is improved, the present device also has a longer service life.

[0028] Some solutions include a control device to prevent the piston rod of the locking cylinder from flying out, such as Figure 1 As shown in , the first valve 1 is a two-position three-way valve, and the control end of the two-position three-way valve is operated to control the connection and disconnection between the main gas source and the first gas path. Preferably, the control end of the two-position three-way valve is provided with a button, and the button is triggered to control the connection and disconnection between the main gas source and the first gas path and the second gas path. Through this solution, when the controlled cylinder 100 needs to stop, the button can be triggered to control the disconnection of the main gas source.

[0029] In some schemes, the control device for preventing the piston rod of the locked cylinder from flying out is that the second valve 2 is a two-position four-way valve; when the two-position four-way valve is in the first conduction position, the cylinder rear chamber 101 is connected with the first gas path, and the piston rod 104 is extended; when the two-position four-way valve is in the second conduction position, the cylinder front chamber 102 is connected with the first gas path, and the piston rod 104 is retracted. In specific implementation, the two-position four-way valve is equipped with a handle, and the handle is turned to control the two-position four-way valve to switch between the first conduction position and the second conduction position. Controlling the direction of the second valve 2 by the handle is simple to operate and efficient.

[0030] Preferably, the air-controlled valve 5 includes a pilot valve body and a main valve body, the second end of the air-controlled valve 5 is the air inlet end of the pilot valve body, the air inlet end of the pilot valve body is opened when the air outlet end of the logic or valve 4 is ventilated, and the main valve body unlocks the piston rod 104 after ventilating the locking chamber 103; the air inlet end of the pilot valve body is closed when the air outlet end of the logic or valve 4 is cut off, and the main valve body locks the piston rod 104 after stopping ventilating the locking chamber 103. The air-controlled valve is realized by means of a pilot valve, and the locking and unlocking of the piston rod 104 are controlled, which has good stability.

[0031] Furthermore, the rear chamber valve 3-1 and the front chamber valve 3-2 are both flow regulating valves. The flow regulating valves are used to control the driving gas flow of the cylinder rear chamber 101 and the cylinder front chamber 102, thereby improving the stability of the operation of the controlled cylinder 100.

[0032] In some embodiments, as shown in the figure, the exhaust ports of the first valve 1, the second valve 2 and the gas-controlled valve 5 are all connected with a gas silencing component 6. The gas silencing component 6 is provided to absorb and dissipate the exhaust sound of the compressed air generated when the valve is exhausted, and the noise pollution to the surrounding environment is reduced by reducing the noise decibel.

[0033] The embodiment of the present application also provides a vehicle body control system, comprising a main air source, a control device for preventing a piston rod of a locking cylinder from flying out as described in any one of the above embodiments, and a locking cylinder, wherein the locking cylinder serves as a controlled cylinder of the control device. The locking chamber of the piston rod of the locking cylinder unlocks the piston rod when air is ventilated, and locks the piston rod when air is cut off.

[0034] In the above-mentioned vehicle body control system, the first valve 1 is a two-position three-way push-button machine-controlled valve, which controls the on-off of the main air source; the second valve 2 is a two-position four-way rotary valve operated by a handle, which controls the extension and retraction of the piston rod 104; the air-controlled valve 5 controls the unlocking and locking of the locking chamber 103 by the on-off of the pilot air; the gas on the high-pressure side of the logic or valve 4 is output to the pilot port of the air-controlled valve 5; the rear chamber valve 3-1 and the front chamber valve 3-2 control the flow rate to improve the stability of the operation of the locked cylinder; the locked cylinder is an actuator, which is unlocked by pressurization and locked by exhaust.

[0035] Combination Figure 1 As shown, in the above system of the present application, when the main gas source is inlet, the button of the first valve 1 is pressed, and the gas flows to the pilot port of the gas control valve 5 through the logic or valve 4, the pilot valve is opened, the gas control valve 5 switches direction, the gas flows to the locking chamber 103 of the locking cylinder, the locking chamber 103 is unlocked, the handle of the second valve 2 is turned, the second valve 2 switches direction, the gas flows to the cylinder rear chamber 101 of the locking cylinder through the rear chamber valve 3-1, and the piston rod 104 of the locking cylinder extends; the handle of the second valve 2 is turned, the second valve 2 switches direction, the gas flows to the cylinder front chamber 102 of the locking cylinder through the front chamber valve 3-2, and the piston rod 104 of the locking cylinder retracts. Pressing the button of the first valve 1, the main gas source is cut off, thereby cutting off the gas source of the gas control valve 5 controlling the locking chamber 103, the locking chamber 103 is locked, and the piston rod 104 of the locking cylinder is locked, so as to achieve locking at any position when the locking cylinder is de-energized. When starting again, press the button of the first valve 1, and the first valve 1 will again pass the gas to the pilot port of the air control valve 5 through the logic or valve 4. After the pilot port of the air control valve 5 is opened, the air control valve 5 will pass the gas into the locking chamber 103 to unlock the piston rod 101 to prevent accidents.

[0036] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0037] The above are only the principles and preferred embodiments of the present application. It should be noted that, for ordinary technicians in this field, on the basis of the principles of the present application, several other modifications can be made, which should also be considered as the protection scope of the present application.

Claims

1. A control device for preventing the piston rod of a locking cylinder from flying out, characterized in that: include: A first valve, an inlet end of which is connected to a main gas source, and an outlet end of which is connected to a first gas path and a second gas path; a second valve, wherein a first port of the second valve is connected to the first gas path, a second port of the second valve is connected to a cylinder rear chamber of a controlled cylinder via a rear chamber valve, and a third port of the second valve is connected to a cylinder front chamber of the controlled cylinder via a front chamber valve; a logic or valve, wherein a first end of the logic or valve is connected to a second port of the second valve, and a second end of the logic or valve is connected to a third port of the second valve; An air-controlled valve, wherein the first end of the air-controlled valve is connected to the second air path, the second end of the air-controlled valve is connected to the air outlet end of the logic or valve, and the air outlet end of the air-controlled valve is connected to the locking chamber of the piston rod of the controlled cylinder.

2. The control device for preventing the piston rod of a locking cylinder from flying out according to claim 1, characterized in that: The first valve is a two-position three-way valve, and the control end of the two-position three-way valve is operated to control the connection and disconnection between the main gas source and the first gas path and the second gas path.

3. The control device for preventing the piston rod of a locking cylinder from flying out according to claim 2, characterized in that: The control end of the two-position three-way valve is provided with a button, and the button is triggered to control the connection and disconnection between the main gas source and the first gas circuit and the second gas circuit.

4. The control device for preventing the piston rod of a locking cylinder from flying out according to claim 1, characterized in that: The second valve is a two-position four-way valve; when the two-position four-way valve is located at the first conduction position, the rear chamber of the cylinder is connected to the first air path, and the piston rod is extended; when the two-position four-way valve is located at the second conduction position, the front chamber of the cylinder is connected to the first air path, and the piston rod is retracted.

5. The control device for preventing the piston rod of a locking cylinder from flying out according to claim 4, characterized in that: The two-position four-way valve is provided with a handle, and the handle is turned to control the two-position four-way valve to switch between the first conducting position and the second conducting position.

6. The control device for preventing the piston rod of a locking cylinder from flying out according to claim 5, characterized in that: The rear chamber valve and the front chamber valve are both flow regulating valves.

7. The control device for preventing the piston rod of a locking cylinder from flying out according to claim 1, characterized in that: The air-controlled valve includes a pilot valve body and a main valve body. The second end of the air-controlled valve is the air inlet end of the pilot valve body. The air inlet end of the pilot valve body opens when air is ventilated at the air outlet end of the logic or valve, and the main valve body unlocks the piston rod after ventilating the locking chamber. The air inlet end of the pilot valve body closes when air is cut off at the air outlet end of the logic or valve, and the main valve body locks the piston rod after stopping ventilating the locking chamber.

8. The control device for preventing the piston rod of a locking cylinder from flying out according to any one of claims 1 to 7, characterized in that: The exhaust ports of the first valve, the second valve and the gas-controlled valve are all connected with gas silencing components.

9. A vehicle body control system, characterized in that: It comprises a main air source, a control device for preventing a piston rod of a locked cylinder from flying out as claimed in any one of claims 1 to 8, and a locked cylinder, wherein the locked cylinder serves as a controlled cylinder of the control device.

10. The vehicle body control system according to claim 9, characterized in that: The locking chamber of the piston rod of the locking cylinder unlocks the piston rod when air is ventilated, and locks the piston rod when air is cut off.

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