CN115450972A - Pneumatic control system and gantry type hydraulic press - Google Patents
Pneumatic control system and gantry type hydraulic press Download PDFInfo
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- CN115450972A CN115450972A CN202211047339.8A CN202211047339A CN115450972A CN 115450972 A CN115450972 A CN 115450972A CN 202211047339 A CN202211047339 A CN 202211047339A CN 115450972 A CN115450972 A CN 115450972A
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- 230000000903 blocking effect Effects 0.000 claims abstract description 81
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 230000033001 locomotion Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
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- Mechanical Engineering (AREA)
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- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a pneumatic control system and a gantry type hydraulic machine, wherein the pneumatic control system comprises: the piston rod of the cylinder is in transmission connection with the control valve so as to drive the control valve to move on the moving stroke of the control valve; the switching device is used for switching one of the two cavities of the air cylinder to be communicated with the air compressor, and the other cavity of the air cylinder to be communicated with the atmosphere; the blocking switch is arranged on the hydraulic pressure head; the communicating pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is used for communicating one of the cavities of the cylinder with the switching device, the second pipeline is used for communicating the other cavity of the cylinder with the blocking switch, and the third pipeline is used for communicating the blocking switch with the air interchanger. The invention uses the foot switch to control the operation of the hydraulic press, liberates both hands of workers, and the automatic resetting of the pressure head is stopped after the press mounting of the workpiece, thereby having convenient operation and simple structure.
Description
Technical Field
The invention relates to the technical field of gantry type hydraulic machines, in particular to a pneumatic control system and a gantry type hydraulic machine.
Background
In the automobile manufacturing process, a large number of workpieces need to be punched, and the gantry type hydraulic press is widely applied to the press fitting process of small workpieces due to the fact that the machine body is small and low in cost.
The existing gantry hydraulic press is rarely applied with a numerical control system due to the cost problem, the operation of the whole machine is completed manually, in the operation process, a worker places a prefabricated part on a press-mounting platform below a pressure head, presses down an operating rod of an operating valve by hand, further enables the pressure head to move downwards, completes the press-mounting of a workpiece, then upwards pushes the operating rod of the operating valve, enables the pressure head to move upwards, finally loosens the operating rod, enables the pressure head to stop moving, takes away the workpiece, and completes the press-mounting.
In the process, a worker needs to overcome the elasticity of a valve core spring in the control valve by 40-50N in the whole process, press down or push up the control rod, and switch the direction of the control rod or release the control rod according to the press mounting progress, so that the whole process is complex in operation, long in time consumption, and is not beneficial to rapid production of workpieces, and the worker needs to invest a large amount of energy.
Disclosure of Invention
The invention mainly aims to provide a pneumatic control system and a gantry type hydraulic machine, and aims to solve the problems that the traditional gantry type hydraulic machine is complex in operation, troublesome and labor-consuming.
In order to achieve the above object, the present invention provides a pneumatic control system for a gantry hydraulic machine, the gantry hydraulic machine including a hydraulic ram and an operation valve, the pneumatic control system including:
the piston rod of the cylinder is in transmission connection with the control valve so as to drive the control valve to move on the moving stroke of the cylinder;
the switching device is used for switching one of the two cavities of the air cylinder to be communicated with the air compressor, and the other cavity of the air cylinder to be communicated with the atmosphere so as to extend or retract a piston rod of the air cylinder;
the blocking switch is arranged on the hydraulic pressure head; and the number of the first and second groups,
the communication pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is used for communicating one of the cavities of the cylinder with the switching device, the second pipeline is used for communicating the other cavity of the cylinder with the blocking switch, and the third pipeline is used for communicating the blocking switch with the air exchange device;
when the blocking switch is switched off, the second pipeline and the third pipeline are disconnected, and the second pipeline is communicated with the atmosphere.
Optionally, the cylinder is arranged above the control valve, and a piston rod of the cylinder can move up and down and is in transmission connection with a control rod of the control valve;
the cavity of the cylinder far away from the control valve is an upper cavity, the cavity close to the control valve is a lower cavity, the first pipeline is communicated with the lower cavity, and the second pipeline is communicated with the upper cavity.
Optionally, the switching device includes:
the two-position five-way valve is provided with a first shell and a first valve core, the first valve core is movably arranged in the first shell and is provided with a first working position and a second working position on the movable stroke, when the first valve core is positioned at the first working position, the third pipeline is used for being communicated with the atmosphere, the first pipeline is used for being communicated with the air compressor, and when the first valve core is positioned at the second working position, the third pipeline is used for being communicated with the air compressor, and the first pipeline is used for being communicated with the atmosphere;
the foot switch is in transmission connection with the first valve core and is used for driving the first valve core to move to the first working position; and (c) a second step of,
and the return spring is in transmission connection with the first valve core or the foot switch and is used for returning the first valve core to the second working position.
Optionally, the blocking switch comprises:
the switch assembly is arranged on a cylinder barrel of the hydraulic pressure head and is respectively communicated with the second pipeline and the third pipeline; and (c) a second step of,
the blocking piece is used for being arranged on a piston rod of the hydraulic pressure head, when the blocking piece is matched with the switch assembly, the blocking switch is in a blocking state, and when the blocking piece is separated from the switch assembly, the blocking switch is in a closing state.
Optionally, the switch assembly comprises:
the connecting piece is used for being fixedly connected with the cylinder barrel of the hydraulic pressure head and is provided with a first connecting hole and a second connecting hole which are opposite to each other, one end of the first connecting hole is communicated with the third pipeline, and one end of the second connecting hole is communicated with the second pipeline;
the movable piece is movably arranged in the connecting piece along the vertical direction and is provided with a closing position and a blocking position on the movement stroke, when the movable piece is positioned at the closing position, the other end of the first connecting hole is communicated with the other end of the second connecting hole, and when the movable piece is positioned at the blocking position, the other end of the second connecting hole is communicated with the atmosphere;
the jacking piece is fixedly connected to the lower end of the moving piece and enables the moving piece to move to the blocking position when being matched with the blocking piece; and the number of the first and second groups,
the piece that resets is located in the connecting piece, with the moving part transmission is connected, is used for resetting the moving part extremely closed position.
Optionally, the movable piece is provided with a first air path and a second air path;
when the movable piece is located at the closed position, one end of the first air path is communicated with the first connecting hole, and the other end of the first air path is communicated with the second connecting hole;
when the movable piece is located at the blocking position, one end of the second air path is communicated with the second connecting hole, and the other end of the second air path is communicated with the atmosphere.
Optionally, the pneumatic control system further comprises an electronic control assembly, the electronic control assembly comprising:
the first switch comprises a first button and a first base, the first button is arranged on the foot switch, the first base is arranged on the first shell, and when the first valve core is located at the first working position, the first button is in conductive contact with the first base; and the number of the first and second groups,
the second switch comprises a second button and a second base, the second button is arranged on the movable piece, the second base is arranged on the connecting piece, and when the movable piece is located at the blocking position, the second button is disconnected with the second base;
the first switch and the second switch are connected in parallel to a circuit of the air compressor, and when the first switch and/or the second switch is in a conductive state, the air compressor is in a starting working state.
Optionally, the first casing has a first side and a second side opposite to the first side, the first side has a first air outlet and a second air outlet spaced from each other in an up-down direction, the second side has a first air outlet, an air inlet and a second air outlet spaced from each other in an up-down direction, the first air outlet is communicated with the first pipeline, the second air outlet is communicated with the third pipeline, the air inlet is communicated with the air compressor, and the first air outlet and the second air outlet are communicated with the atmosphere;
when the first valve core is positioned at the first working position, the first air outlet is communicated with the air inlet, and the second air outlet is communicated with the second air outlet;
when the first valve core is located at the second working position, the first air outlet is communicated with the first exhaust port, and the second air outlet is communicated with the air inlet.
Optionally, the switching device includes:
the two-position five-way electromagnetic valve is provided with a second shell, a second valve core and an electromagnetic device, the second valve core is movably arranged in the second shell and has a third working position and a fourth working position on the movable stroke, when the second valve core is positioned at the third working position, the third pipeline is communicated with the atmosphere, the first pipeline is communicated with the air compressor, when the second valve core is positioned at the fourth working position, the third pipeline is communicated with the air compressor, the first pipeline is communicated with the atmosphere, and the electromagnetic device is used for driving the second valve core to move; and the number of the first and second groups,
and the control switch is electrically connected with the electromagnetic device to control the electromagnetic device to drive the second valve core to move between the third working position and the fourth working position.
The invention also provides a gantry type hydraulic machine which comprises any one of the pneumatic control systems.
According to the technical scheme, a piston rod of the air cylinder is in transmission connection with the control valve so as to drive the operation valve to move on the moving stroke of the operation valve, the switching device is used for switching one of two cavities of the air cylinder to be communicated with an air compressor, the other cavity of the air cylinder is communicated with the atmosphere so as to enable the piston rod of the air cylinder to extend or retract, the blocking switch is arranged on the hydraulic pressure head, one of the cavities of the air cylinder is communicated with the switching device through the first pipeline, the second pipeline is communicated with the other cavity of the air cylinder and the blocking switch, the third pipeline is communicated with the blocking switch and the air exchange device, a worker controls the switching device to switch the communication relation between the communication pipelines by feet to control the air cylinder to move so as to control the hydraulic pressure head to move to complete workpiece press fitting, after the switching device is released, the system operates reversely, the hydraulic pressure head moves upwards and triggers the blocking switch to disconnect the second pipeline and the third pipeline and enable the second pipeline and the third pipeline to be communicated with the atmosphere, and further enable the hydraulic press to stop operation automatically.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a pneumatic control system according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A1;
fig. 3 is a partially enlarged view of a portion at A2 in fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name(s) |
| 100 | |
23 | Reset spring |
| 1 | |
3 | |
| 11 | |
31 | |
| 12 | |
311 | Connecting |
| 2 | |
3111 | First connecting |
| 21 | Two-position five- |
3112 | Second connecting |
| 211 | |
312 | |
| 2111 | |
3121 | |
| 2112 | |
3122 | The |
| 2113 | |
313 | |
| 2114 | |
314 | Resetting |
| 2115 | |
32 | |
| 2116 | |
4 | Communicating |
| 2117 | |
41 | |
| 212 | |
42 | The |
| 2121 | Isolating |
43 | |
| 2122 | |
200 | |
| 22 | Pedal |
201 | Control lever |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions relating to "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B", including either A or B or both A and B. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Because the numerical control system is high in cost, the existing gantry hydraulic press is rarely used and still depends on manual operation, when a worker presses and assembles a workpiece, the worker needs to overcome the elasticity of a valve core spring in the control valve by 40-50N in the whole process, press or push the control rod downwards, and switch the direction of the control rod or loosen the control rod according to the pressing and assembling progress, the whole process is complex in operation, long in time consumption, and needs a great deal of effort of the worker, and the worker can cause unqualified workpiece pressing and assembling quality even cause safety accidents without paying attention.
To this end, the present invention proposes a pneumatic control system 100 for a gantry hydraulic machine comprising a hydraulic ram and a control valve 200, and with reference to fig. 1 to 3, the pneumatic control system 100 comprises: the device comprises an air cylinder 1, a switching device 2, a blocking switch 3 and a communicating pipeline 4, wherein a piston rod of the air cylinder 1 is in transmission connection with the control valve 200 so as to drive the control valve 200 to move on the moving stroke; the switching device 2 is used for switching one of the two cavities of the air cylinder 1 to be communicated with an air compressor, and the other cavity of the air cylinder 1 to be communicated with the atmosphere, so that a piston rod of the air cylinder 1 extends or retracts; the blocking switch 3 is arranged on the hydraulic pressure head; the communication pipeline 4 comprises a first pipeline 41, a second pipeline 42 and a third pipeline 43, the first pipeline 41 is used for communicating one of the cavities of the cylinder 1 with the switching device 2, the second pipeline 42 is used for communicating the other cavity of the cylinder 1 with the blocking switch 3, and the third pipeline 43 is used for communicating the blocking switch 3 with the ventilation device; when the blocking switch 3 is closed, the second pipeline 42 is communicated with the third pipeline 43, when the blocking switch 3 is disconnected, the second pipeline 42 is disconnected with the third pipeline 43, and the second pipeline is communicated with the atmosphere.
In the standby state, the third line 43 is in communication with the air compressor, the first line 41 is in communication with the atmosphere, the blocking switch 3 is closed, the worker controls the switching device 2 with the foot to communicate the third pipeline 43 with the atmosphere, the first pipeline 41 is communicated with the air compressor, high-pressure air in the air compressor enters a cavity of the cylinder 1 through the switching device 2 and the first pipeline 41 in sequence, so that the cylinder 1 controls the control rod 201 of the control valve 200 to move, and then the hydraulic pressure head is pressed down, after the press-fitting is completed, the worker releases the switching device 2 to communicate the third pipeline 43 with the air compressor, the first pipeline 41 is communicated with the atmosphere, the high-pressure air in the air compressor enters the other cavity of the air cylinder 1 through the switching device 2, the third pipeline 43, the blocking switch 3 and the second pipeline 42 in sequence, the air cylinder 1 moves in the reverse direction, the control rod 201 of the control valve 200 is controlled to move in the reverse direction, the hydraulic pressure head moves upwards, when the hydraulic pressure head returns to the initial position, the blocking switch 3 is triggered to be in a disconnected state, the second and third ducts 42, 43 are disconnected from each other and are connected to the atmosphere, when the air pressure in the two chambers of the cylinder 1 is equal, the pilot valve 200 returns to the initial position, under the action of the built-in spring, to stop the movement of the hydraulic ram, make simultaneously the piston of cylinder 1 gets back to initial position, the overall process only need the workman trample or loosen auto-change over device 2 can, easy operation is swift, liberates workman's both hands, makes the pressure equipment process lighter.
It should be noted that the pneumatic control system 100 provided by the present invention may be designed in an integrated manner, and the gantry hydraulic machine is produced together with the gantry hydraulic machine during manufacturing, and as a part of the gantry hydraulic machine, the pneumatic control system 100 may also be designed in a split manner, and is produced separately, and then is connected to the gantry hydraulic machine by welding or other processes.
Specifically, in the present embodiment, the cylinder 1 is configured to be disposed above the control valve 200, and a piston rod of the cylinder 1 is movable in an up-down direction and is in transmission connection with a control rod 201 of the control valve 200; the cavity of the cylinder 1 far away from the control valve 200 is an upper cavity 11, the cavity close to the control valve 200 is a lower cavity 12, the first pipeline 41 is communicated with the lower cavity 12, and the second pipeline 42 is communicated with the upper cavity 11.
The control rod 201 of the control valve 200 is usually disposed at an upper position, and when the control rod 201 is pressed down, the hydraulic pressure head moves downward, when the control rod 201 is pushed up, the hydraulic pressure head moves upward, the cylinder 1 is disposed above the control valve 200, so that a piston rod of the cylinder 1 is in transmission connection with the control rod 201, and is adapted to the control rod 201, the lower cavity 12 is communicated with the first pipeline 41, the upper cavity 11 is communicated with the second pipeline 42, so that when the switching device 2 is stepped on, high-pressure gas is input into the lower cavity 12, when the switching device 2 is released, high-pressure gas is input into the upper cavity 11, and the other cavity is communicated with the atmosphere, so that the piston rod of the cylinder 1 moves in a corresponding direction, and the control rod 201 is driven to move.
It should be noted that the cylinder 1 may also be disposed below the control valve 200, and connected to the control rod 201 through a bent rod, and the arrangement of the upper cavity 11 and the lower cavity 12 and the connection relationship between the first pipeline 41 and the second pipeline 42 are correspondingly changed to adapt to the arrangement, so that the operation of the pneumatic control system 100 corresponds to the gantry hydraulic machine.
Further, in the present embodiment, the switching device 2 includes: the two-position five-way valve 21 is provided with a first housing 211 and a first valve core 212, the first valve core 212 is movably arranged in the first housing 211 and has a first working position and a second working position on a movable stroke, when the first valve core 212 is located at the first working position, the third pipeline 43 is used for communicating with the atmosphere, the first pipeline 41 is used for communicating with the air compressor, and when the first valve core 212 is located at the second working position, the third pipeline 43 is used for communicating with the air compressor, and the first pipeline 41 is used for communicating with the atmosphere; the foot switch 22 is in transmission connection with the first valve spool 212 and is used for driving the first valve spool 212 to move to the first working position; and a return spring 23, which is in transmission connection with the first valve spool 212 or the foot switch 22, and is used for returning the first valve spool 212 to the second working position.
The two-position five-way valve 21 can be arranged on a main body of the gantry type hydraulic machine, can also be arranged on the ground, can also be movably arranged, can be adjusted correspondingly according to actual requirements, and can be arranged in a horizontal direction or a vertical direction, specifically, in the embodiment, the two-position five-way valve 21 is arranged on the main body of the gantry type hydraulic machine and is positioned below a press mounting platform, so that a worker can quickly find the position of the press mounting platform when the press mounting is carried out, the two-position five-way valve 21 is arranged in the vertical direction, so that the first valve core 212 moves up and down, the worker treads the foot switch 22 downwards, the first valve core 212 can be moved to the first working position from the second working position, the reset spring 23 is arranged in the first valve core 211, one end of the reset spring is connected with the first valve core 212, the other end of the reset spring is connected with the first valve core 211, and when the first valve core 212 moves to the first working position from the second working position, the first valve core 212 compresses the reset spring 23, and when the foot switch 22 is loosened, the first valve core 23 deforms and enables the second valve core 212 to move to the second working position.
Further, in the present embodiment, the blocking switch 3 includes: the switch assembly 31 is arranged on a cylinder of the hydraulic pressure head and is respectively communicated with the second pipeline 42 and the third pipeline 43; and the blocking piece 32 is arranged on a piston rod of the hydraulic pressure head, when the blocking piece 32 is matched with the switch component 31, the blocking switch 3 is in a blocking state, and when the blocking piece 32 is separated from the switch component 31, the blocking switch 3 is in a closed state.
The switch assembly 31 is arranged on a cylinder barrel of the hydraulic pressure head, the blocking piece 32 is fixedly connected to a piston rod of the hydraulic pressure head, when the piston rod of the hydraulic pressure head moves, the blocking piece 32 moves up and down along with the piston rod, when the hydraulic pressure head is at an initial position, the blocking piece 32 is matched with the switch assembly 31 so as to enable the second pipeline 42 to be communicated with the third pipeline 43, and when the hydraulic pressure head moves downwards, the blocking piece 32 is driven to move downwards so as to enable the blocking piece 32 to be separated from the switch assembly 31, so that the second pipeline 42 is disconnected from the third pipeline 43, and the second pipeline 42 is communicated with the atmosphere.
Still further, referring to fig. 3, the switch assembly 31 includes: the connecting piece 311 is used for being fixedly connected with the cylinder barrel of the hydraulic pressure head and is provided with a first connecting hole 3111 and a second connecting hole 3112 which are opposite to each other, one end of the first connecting hole 3111 is communicated with the third pipeline 43, and one end of the second connecting hole 3112 is communicated with the second pipeline 42; the movable member 312 is movably disposed in the connecting member 311 in the up-down direction, and has a closed position and a blocking position on a moving stroke thereof, when the movable member 312 is located at the closed position, the other end of the first connecting hole 3111 is used for communicating with the other end of the second connecting hole 3112, and when the movable member 312 is located at the blocking position, the other ends of the first connecting hole 3111 and the second connecting hole 3112 are both used for communicating with the atmosphere; a lifting member 313 fixedly connected to the lower end of the movable member 312, and moving the movable member 312 to the blocking position when being matched with the blocking member 32; and a reset member 314 disposed in the connecting member 311, connected to the movable member 312 in a transmission manner, and configured to reset the movable member 312 to the closed position.
The connecting piece 311 is fixedly connected with a cylinder barrel of the hydraulic pressure head, when the hydraulic pressure head is at an initial position, the moving piece 312 is located at the blocking position, the hydraulic pressure head moves downwards to drive the blocking piece 32 to move downwards, the jacking piece 313 loses the thrust of the blocking piece 32, the moving piece 312 is not limited any more, the moving piece 312 moves downwards to the closing position under the action of the resetting piece 314, after the press-fitting is completed, the hydraulic pressure head moves upwards, the blocking piece 32 moves to be in contact with the jacking piece 313 along with the upward movement of the jacking piece 313, the moving piece 312 is further pushed to move to the blocking position, at the moment, the pressure on two sides of a piston rod of the cylinder 1 is equal, the pulling force is not applied to the control rod 201 any more, the piston of the control valve 200 returns to the original position under the action of the resetting spring, and the hydraulic pressure head automatically stops moving.
Specifically, in this embodiment, the reset element 314 is a spring, and is disposed on the top of the movable element 312, one end of the spring is fixedly connected to the movable element 312, and the other end of the spring is fixedly connected to the connecting element 311.
In order to enable the movable element 312 to quickly change the connection relationship between the first connection hole 3111 and the second connection hole 3112 through vertical movement, in this embodiment, a first air passage 3121 and a second air passage 3122 are disposed in the movable element 312, when the movable element 312 is located at the closed position, one end of the first air passage 3121 communicates with the first connection hole 3111, and the other end communicates with the second connection hole 3112; when the movable member 312 is located at the blocking position, one end of the second air passage 3122 is communicated with the second connection hole 3112, and the other end is communicated with the atmosphere.
The arrangement is such that when the first connection hole 3111 and the second connection hole 3112 are communicated with each other, the second pipeline 42 and the third pipeline 43 are communicated with each other through the first air passage 3121 to deliver high-pressure gas to the upper cavity 11, or the lower cavity 12 is communicated with the atmosphere, when the first connection hole 3111 and the second connection hole 3112 are disconnected, the second air passage 3122 is used to communicate the second pipeline 42 with the atmosphere, so that the pressures on both sides of the piston of the cylinder 1 are equal, and further the external force is not applied to the operating rod 201, the operating valve 200 returns to the initial state, and the hydraulic ram stops moving.
It should be noted that, in this embodiment, one end of the first connection hole 3111 close to the movable element 312 is blocked by the movable element 312, and the high-pressure gas in the air compressor is no longer output outwards, in another embodiment, a third gas path is further disposed in the movable element 312, and when the movable element 312 is located at the blocking position, the third gas path makes the other end of the first connection hole 3111 communicate with the atmosphere, so as to avoid that the high-pressure gas in the third pipeline is too much, which damages the connection between the third pipeline and other structures, or damages the air compressor.
Further, in this embodiment, the pneumatic control system 100 further includes an electric control assembly, which includes a first switch and a second switch, the first switch includes a first button and a first base, the first button is disposed on the foot switch 22, the first base is disposed on the first housing 211, and when the first valve core 212 is located at the first working position, the first button and the first base are in conductive contact; the second switch comprises a second button and a second base, the second button is arranged on the movable piece 312, the second base is arranged on the connecting piece 311, and when the movable piece 312 is located at the blocking position, the second button is disconnected with the second base; the first switch and the second switch are connected in parallel to a circuit of the air compressor, and when the first switch and/or the second switch is in a conductive state, the air compressor is in a starting working state.
When the gantry hydraulic machine does not press-fit a workpiece, the first switch and the second switch are both powered off, the air compressor is in an off-line state, high-pressure gas is not generated, a worker treads the foot switch 22 to move the first valve core 212 to the first working position, the first switch is powered on, the air compressor is synchronously started, and the pneumatic control system 100 can normally work; after the blocking member 32 and the lifting member 313 are disengaged, the movable member 312 moves under the action of the resetting member 314 to leave the blocking position, the second switch is powered on, after the worker releases the foot switch 22, the first switch is powered off, and the air compressor continues to work under the action of the second switch; the hydraulic pressure head moves upwards to enable the blocking piece 32 to be in contact with the jacking piece 313, then the movable piece 312 is pushed to move to the blocking position, the second switch is powered off, the air compressor stops working, and by the arrangement, the pneumatic control system 100 is further prevented from being damaged while electricity is saved.
It should be noted that the setting positions and sizes of the second button and the second base may be adjusted according to actual needs, so that the movable element 312 leaves the blocking position, and in the process of moving to the communicating position, the second button and the second base are always in a contact conductive state, and only when the movable element 312 is in the blocking position or in a very short distance downward from the blocking position, the second button and the second base are in a separated power-off state.
In addition, the electric control assembly can be omitted, when a plurality of gantry type hydraulic machines are provided with the pneumatic control system 100 and the pneumatic control system 100 shares one air compressor, the electric control assembly is cancelled so as to avoid mutual interference, and the air compressor is prevented from being frequently started and stopped in a short time and damaged. Specifically, the specific type of the air compressor is not limited herein, and the pressure required in the actual working condition, how much air is supplied by one air compressor, and the like are taken into consideration.
Specifically, in this embodiment, referring to fig. 2, the first housing 211 is provided with a first side and a second side opposite to each other, the first side is provided with a first air outlet 2111 and a second air outlet 2112 at intervals along the vertical direction, the second side is provided with a first air outlet 2113, an air inlet 2115 and a second air outlet 2114 at intervals along the vertical direction in sequence, the first air outlet 2111 is communicated with the first pipeline 41, the second air outlet 2112 is communicated with the third pipeline 43, the air inlet 2115 is used for being communicated with the air compressor, and the first air outlet 2113 and the second air outlet 2114 are used for being communicated with the atmosphere; when the first valve core 212 is located at the first working position, the first air outlet 2111 is communicated with the air inlet 2115, and the second air outlet 2112 is communicated with the second air outlet 2114; when the first valve spool 212 is in the second operating position, the first outlet port 2111 communicates with the first outlet port 2113, and the second outlet port 2112 communicates with the inlet port 2115.
The arrangement is such that the first valve core 212 changes the communication relationship between the air ports arranged on the first side and the second side through movement, thereby rapidly switching the air inlet and outlet states of the upper and lower cavities 12.
Correspondingly, in this embodiment, the first valve element 212 is provided with a plurality of isolating rings 2121, the isolating ring 2121 switches the communication relationship between the first side and the second side upper ports, the first housing 211 is provided with an upper limit protrusion 2116 and a lower limit protrusion 2117, the first valve element 212 is provided with a limit ring 2122, the limit ring 2122 is located between the upper limit protrusion 2116 and the lower limit protrusion 2117 to limit the moving range of the first valve element 212, when the limit ring 2122 abuts against the upper limit protrusion 2116, the first valve element 212 is located at the second working position, and when the limit ring 2122 abuts against the lower limit protrusion 2117, the first valve element 212 is located at the first working position.
Further, in another embodiment, the switching device 2 includes: the two-position five-way electromagnetic valve is provided with a second shell, a second valve core and an electromagnetic device, the second valve core is movably arranged in the second shell and has a third working position and a fourth working position on the movable stroke, when the second valve core is positioned at the third working position, the third pipeline 43 is communicated with the atmosphere, the first pipeline 41 is communicated with the air compressor, when the second valve core is positioned at the fourth working position, the third pipeline 43 is communicated with the air compressor, the first pipeline 41 is communicated with the atmosphere, and the electromagnetic device is used for driving the second valve core to move; and the control switch is electrically connected with the electromagnetic device so as to control the electromagnetic device to drive the second valve core to move between the third working position and the fourth working position.
The functions of the second housing and the second valve core are the same as those of the first housing 211 and the first valve core 212, which are not described in detail herein, the electromagnetic device is used to drive the second valve core to move, so that the operation of a worker is more labor-saving, and compared with the foot switch 22, the control switch does not need to step on the distance between the first working position and the second working position, which is more convenient than the foot switch 22.
It should be noted that the setting position of the control switch is not limited to being stepped by a foot, because the control switch is an electrical element and is arranged at a higher position, the control switch is convenient to operate by hand, and can be adjusted according to actual needs.
The invention further provides a gantry hydraulic machine, which comprises the pneumatic control system 100 according to any one of the embodiments, and the specific structure of the pneumatic control system 100 refers to the embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A pneumatic control system for a gantry hydraulic machine, the gantry hydraulic machine including a hydraulic ram and a control valve, the pneumatic control system comprising:
the piston rod of the cylinder is in transmission connection with the control valve so as to drive the control valve to move on the moving stroke of the cylinder;
the switching device is used for switching one of the two cavities of the air cylinder to be communicated with the air compressor, and the other cavity of the air cylinder is communicated with the atmosphere, so that a piston rod of the air cylinder extends or retracts;
the blocking switch is arranged on the hydraulic pressure head; and the number of the first and second groups,
the communication pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is used for communicating one of the cavities of the cylinder with the switching device, the second pipeline is used for communicating the other cavity of the cylinder with the blocking switch, and the third pipeline is used for communicating the blocking switch with the air interchanger;
when the blocking switch is switched off, the second pipeline is disconnected with the third pipeline, and the second pipeline is communicated with the atmosphere.
2. The pneumatic control system of claim 1, wherein the cylinder is configured to be disposed above the pilot valve, and a piston rod of the cylinder is movable in an up-and-down direction and is in transmission connection with a pilot rod of the pilot valve;
the cavity of the cylinder far away from the control valve is an upper cavity, the cavity close to the control valve is a lower cavity, the first pipeline is communicated with the lower cavity, and the second pipeline is communicated with the upper cavity.
3. The pneumatic control system of claim 2, wherein the switching device comprises:
the two-position five-way valve is provided with a first shell and a first valve core, the first valve core is movably arranged in the first shell and is provided with a first working position and a second working position on the movable stroke, when the first valve core is positioned at the first working position, the third pipeline is used for being communicated with the atmosphere, the first pipeline is used for being communicated with the air compressor, and when the first valve core is positioned at the second working position, the third pipeline is used for being communicated with the air compressor, and the first pipeline is used for being communicated with the atmosphere;
the foot switch is in transmission connection with the first valve core and is used for driving the first valve core to move to the first working position; and the number of the first and second groups,
and the return spring is in transmission connection with the first valve core or the foot switch and is used for returning the first valve core to the second working position.
4. The pneumatic control system of claim 3, wherein the blocking switch comprises:
the switch assembly is arranged on a cylinder barrel of the hydraulic pressure head and is respectively communicated with the second pipeline and the third pipeline; and (c) a second step of,
the blocking piece is used for being arranged on a piston rod of the hydraulic pressure head, the blocking piece is in a blocking state when being matched with the switch assembly, and the blocking piece is in a closing state when being separated from the switch assembly.
5. The pneumatic control system of claim 4, wherein the switch assembly comprises:
the connecting piece is used for being fixedly connected with the cylinder barrel of the hydraulic pressure head and is provided with a first connecting hole and a second connecting hole which are opposite to each other, one end of the first connecting hole is communicated with the third pipeline, and one end of the second connecting hole is communicated with the second pipeline;
the movable piece is movably arranged in the connecting piece in the vertical direction and is provided with a closing position and a blocking position on the moving stroke, when the movable piece is positioned at the closing position, the other end of the first connecting hole is communicated with the other end of the second connecting hole, and when the movable piece is positioned at the blocking position, the other end of the second connecting hole is communicated with the atmosphere;
the jacking piece is fixedly connected to the lower end of the movable piece and enables the movable piece to move to the blocking position when being matched with the blocking piece; and the number of the first and second groups,
the reset piece is arranged in the connecting piece, is in transmission connection with the moving piece and is used for resetting the moving piece to the closed position.
6. The pneumatic control system of claim 5, wherein the movable member has a first gas path and a second gas path;
when the movable piece is located at the closed position, one end of the first air path is communicated with the first connecting hole, and the other end of the first air path is communicated with the second connecting hole;
when the movable piece is located at the blocking position, one end of the second air path is communicated with the second connecting hole, and the other end of the second air path is communicated with the atmosphere.
7. The pneumatic control system of claim 5, further comprising an electronic control assembly, the electronic control assembly comprising:
the first switch comprises a first button and a first base, the first button is arranged on the foot switch, the first base is arranged on the first shell, and when the first valve core is located at the first working position, the first button is in conductive contact with the first base; and (c) a second step of,
the second switch comprises a second button and a second base, the second button is arranged on the movable piece, the second base is arranged on the connecting piece, and when the movable piece is located at the blocking position, the second button is disconnected with the second base;
the first switch and the second switch are connected in parallel to a circuit of the air compressor, and when the first switch and/or the second switch is in a conductive state, the air compressor is in a starting working state.
8. The pneumatic control system of claim 3,
the first shell is provided with a first side and a second side which are opposite, the first side is provided with a first air outlet and a second air outlet at intervals along the vertical direction, the second side is sequentially provided with a first exhaust port, an air inlet and a second exhaust port at intervals along the vertical direction, the first air outlet is communicated with the first pipeline, the second air outlet is communicated with the third pipeline, the air inlet is communicated with the air compressor, and the first exhaust port and the second exhaust port are communicated with the atmosphere;
when the first valve core is positioned at the first working position, the first air outlet is communicated with the air inlet, and the second air outlet is communicated with the second air outlet;
when the first valve core is located at the second working position, the first air outlet is communicated with the first exhaust port, and the second air outlet is communicated with the air inlet.
9. The pneumatic control system of claim 2, wherein the switching device comprises:
the two-position five-way electromagnetic valve is provided with a second shell, a second valve core and an electromagnetic device, the second valve core is movably arranged in the second shell and is provided with a third working position and a fourth working position on the movable stroke, when the second valve core is positioned at the third working position, the third pipeline is communicated with the atmosphere, the first pipeline is communicated with the air compressor, when the second valve core is positioned at the fourth working position, the third pipeline is communicated with the air compressor, the first pipeline is communicated with the atmosphere, and the electromagnetic device is used for driving the second valve core to move; and the number of the first and second groups,
and the control switch is electrically connected with the electromagnetic device to control the electromagnetic device to drive the second valve core to move between the third working position and the fourth working position.
10. Gantry hydraulic machine, characterized in that it comprises a pneumatic control system according to any one of claims 1 to 9.
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| CN202211047339.8A CN115450972B (en) | 2022-08-29 | 2022-08-29 | Pneumatic control system and gantry hydraulic press |
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| CN202211047339.8A CN115450972B (en) | 2022-08-29 | 2022-08-29 | Pneumatic control system and gantry hydraulic press |
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| CN115450972B CN115450972B (en) | 2024-04-23 |
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| CN101776102A (en) * | 2010-01-08 | 2010-07-14 | 烟台未来自动装备有限责任公司 | Micro automatic reciprocating air cylinder |
| CN103821793A (en) * | 2014-03-17 | 2014-05-28 | 奉化市全盛自动化工程有限公司 | Multi-stroke air cylinder control system |
| CN104481956A (en) * | 2014-12-23 | 2015-04-01 | 李贵伦 | Automatic reversing control system for double-acting cylinder based on travel control |
| CN211314709U (en) * | 2019-12-13 | 2020-08-21 | Smc(中国)有限公司 | Cylinder body and cylinder device |
| CN114458819A (en) * | 2022-04-12 | 2022-05-10 | 深圳市恒拓高工业技术股份有限公司 | Pneumatic switch assembly and switch system with same |
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2022
- 2022-08-29 CN CN202211047339.8A patent/CN115450972B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776102A (en) * | 2010-01-08 | 2010-07-14 | 烟台未来自动装备有限责任公司 | Micro automatic reciprocating air cylinder |
| CN103821793A (en) * | 2014-03-17 | 2014-05-28 | 奉化市全盛自动化工程有限公司 | Multi-stroke air cylinder control system |
| CN104481956A (en) * | 2014-12-23 | 2015-04-01 | 李贵伦 | Automatic reversing control system for double-acting cylinder based on travel control |
| CN211314709U (en) * | 2019-12-13 | 2020-08-21 | Smc(中国)有限公司 | Cylinder body and cylinder device |
| CN114458819A (en) * | 2022-04-12 | 2022-05-10 | 深圳市恒拓高工业技术股份有限公司 | Pneumatic switch assembly and switch system with same |
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| CN115450972B (en) | 2024-04-23 |
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