A pneumatic switching device for a winding machine

Abstract

The application relates to the technical field of pneumatic control of textile machinery, and discloses a gas pressure switching device for a bobbin winder, which comprises a first gas path and a second gas path, the first gas path and the second gas path being connected with an execution part respectively; a control valve, which is arranged in the first gas path; and a pressure selector, which comprises a first gas inlet, a second gas inlet and a gas outlet, the first gas inlet being arranged between the first gas path and the execution part, the second gas inlet being arranged between the second gas path and the execution part, and the gas outlet being connected with the execution part. The first gas path and the second gas path are independently arranged, the control valve and the pressure selector are matched to build a gas path structure with separated gas inlet and gas outlet, the technical problems of a common gas inlet and outlet path and mutual restriction of gas inlet and outlet of a traditional bobbin winder gas pressure switching device are solved, orderly switching of the gas path is realized, the contact pressure change between the bobbin yarn and the groove cylinder can better match the process requirements, and the pneumatic control scene of the automatic bobbin winder is adapted.

Description

Technical Field

[0001] This invention relates to the field of pneumatic control technology for textile machinery, and specifically to a pneumatic pressure switching device for a winding machine. Background Technology

[0002] In the process of automatic winding of yarn packages, in order to achieve anti-overlap control in the overlapping area, the contact pressure between the yarn package and the winding drum needs to change rapidly. Existing technologies mostly use a single solenoid valve for pressure control. Due to its inherent structural limitations, it generally suffers from long pressure switching time and slow response speed, making it difficult to meet the process requirements of efficient anti-overlap.

[0003] In existing technologies, the fundamental reason for slow response is that intake and exhaust share the same passage. Gas discharge and fresh air intake within the cylinder must alternate along the same path, creating a delayed "exhaust first, then intake" process. This is especially true in closed cylinder structures, where exhaust speed is severely limited. Pressure can only be rebuilt after the original gas in the cylinder has been largely emptied, resulting in a significant lag in pressure changes. Increasing the solenoid valve diameter to improve response speed not only has limited effectiveness but also significantly increases equipment costs. Summary of the Invention

[0004] This invention provides a pneumatic pressure switching device for a winding machine to solve the problems of long pneumatic pressure switching time and slow response in the prior art.

[0005] This invention provides a pneumatic pressure switching device for a winding machine, comprising: The first air passage and the second air passage are respectively connected to the actuator; Control valve, the control valve is located in the first air path; The pressure selector includes a first air inlet, a second air inlet, and an air outlet. The first air inlet is located between a first air passage and an actuator, the second air inlet is located between a second air passage and an actuator, and the air outlet is connected to the actuator.

[0006] Beneficial effects: By setting up independent first and second air paths, and constructing an air path architecture with separate intake and exhaust, along with control valves and pressure selectors, the technical problems of shared intake and exhaust paths and mutual constraints between intake and exhaust in traditional winder air pressure switching devices are fundamentally solved. This achieves orderly switching of air paths, effectively shortens air pressure switching time, and allows the contact pressure changes between the yarn package and the grooved drum to better match process requirements, improving the anti-overlapping effect. In addition, the overall device structure is simple and adaptable to the pneumatic control scenarios of automatic winders.

[0007] In one alternative embodiment, an exhaust valve is also provided between the control valve and the first air inlet.

[0008] Beneficial effects: Adding an exhaust valve between the control valve and the first air inlet of the pressure selector can provide a low-resistance exhaust path for the high-pressure gas in the actuator to directly reach the atmosphere, realize ultra-fast exhaust of the gas in the actuator, significantly shorten the exhaust stage time, further accelerate the overall gas pressure switching process, make the pressure response speed of the device better, and better meet the requirements of the high-speed process of the winding machine.

[0009] In one optional embodiment, a feedback branch is also included, one end of which is connected to the pipeline between the air outlet and the actuator, and the other end is connected to the second air path. The feedback branch is equipped with a branch control valve.

[0010] Beneficial effects: The addition of a feedback branch with a branch control valve allows residual high-pressure gas in the actuator to be directed to the second inlet of the pressure selector during high-pressure to low-pressure switching. This creates instantaneous high pressure that actively drives the valve core of the pressure selector, enabling parallel exhaust and valve core switching actions. This overcomes the limitations of traditional passive waiting for pressure difference to achieve valve core switching, significantly shortening the response time of gas path switching. At the same time, the branch control valve is linked with the main control valve, ensuring gas path isolation and stability in all states of the system, and preventing gas leakage from affecting the switching effect and pressure stability.

[0011] In one optional embodiment, the control valve is an on / off solenoid valve with a diameter of not less than 6 mm, used to switch the gas source of the first gas path on and off and to exhaust the gas from the first gas path.

[0012] Beneficial effects: Setting the control valve as an on / off solenoid valve with a diameter of not less than 6mm can ensure that the first air path has sufficient exhaust flow to ensure the efficiency of the exhaust stage, and can stably switch the air source of the first air path on and off, realizing integrated control of the air source on / off and exhaust of the first air path. Moreover, the use of a standard diameter solenoid valve can maintain a reasonable cost structure of the system while ensuring exhaust speed and control reliability, thus balancing performance and economy.

[0013] In one optional implementation, the pressure selector is a shuttle valve, which drives the valve core to move through the pressure difference between the first and second air paths, thereby achieving automatic switching of the air paths.

[0014] Beneficial effects: Using a shuttle valve as a pressure selector, the valve core movement and automatic air path switching are realized by utilizing the purely mechanical differential pressure drive characteristics of the shuttle valve. No additional control circuit is required, which simplifies the control logic of the device, reduces the possibility of circuit failure, and makes the system operation more stable and reliable. In addition, the mechanical structure of the shuttle valve has a long service life and can be adapted to industrial scenarios where the winding machine operates continuously for a long time, reducing the frequency and cost of equipment maintenance.

[0015] In one optional embodiment, the air inlet ends of both the first and second air passages are provided with pressure regulating components, which are used to stabilize the air supply pressure of the corresponding air passages.

[0016] Beneficial effects: Pressure regulating components are installed at the air inlet ends of both the first and second air paths, which can accurately and stably stabilize the air supply pressure of the corresponding air paths, avoid the impact of air source pressure fluctuations on the air pressure switching effect and the working status of the actuators, ensure that the first and second air paths always maintain the set working air pressure, make the differential pressure drive of the pressure selector more accurate and stable, ensure the timeliness and accuracy of air path switching, and thus ensure the stable change of yarn contact pressure, thereby improving the yarn quality.

[0017] In one optional implementation, the working pressure of the first air path is 1.5-2.0 bar, and the working pressure of the second air path is 0.5-1.2 bar.

[0018] Beneficial effects: Setting the working air pressure of the first air path to 1.5-2.0 bar and the second air path to 0.5-1.2 bar provides sufficient and appropriate differential pressure driving force for the movement of the shuttle valve core, ensuring that the shuttle valve can quickly and reliably achieve automatic air path switching. At the same time, this air pressure parameter is adapted to the process requirements of the winding machine, ensuring that the contact pressure between the yarn and the grooved cylinder meets the winding requirements. The second air path is the normal air pressure for spinning, and 0.5-1.2 bar is the set range. Too low a pressure will cause yarn wear, and too little support will increase the pressure and friction between the yarn and the grooved cylinder. Too high a pressure will result in too little friction driving force, and the grooved cylinder will not be able to drive the yarn to wind normally.

[0019] In one alternative implementation, the control valve works in conjunction with the pressure selector to ensure that the overall pressure switching time of the device is no more than 450ms.

[0020] Beneficial effects: The control valve and pressure selector work together to achieve an overall pressure switching time of no more than 450ms, realizing high-speed air pressure switching. This completely solves the problems of long switching time and pressure changes lagging behind process requirements in traditional devices. It allows the contact pressure change between the yarn package and the winding drum to be precisely synchronized with the process requirements of anti-overlap control of the winding machine, effectively improving the anti-overlap effect, reducing yarn wear during the winding process, and significantly improving yarn quality. At the same time, it adapts to the process development needs of high-speed winding and provides reliable pneumatic control support for high-speed winding machines.

[0021] In one alternative implementation, the pressure selector isolates the second gas path and forms an exhaust passage when the control valve is closed, releasing the gas inside the actuator.

[0022] Beneficial effects: When the control valve is closed, the pressure selector can automatically isolate the second air path and form an exhaust path, which can prevent the gas from the second air path from entering the actuator during the exhaust stage and causing exhaust interference. This achieves complete and interference-free exhaust of the gas in the actuator, ensuring the efficiency of the exhaust stage. At the same time, isolating the second air path can prevent pressure disturbances caused by the interconnection of high and low pressure air paths, ensuring that the set pressure can be quickly and stably established when the low pressure air path is connected, thus improving the overall stability and accuracy of air pressure switching.

[0023] In one alternative implementation, when the control valve is opened, the gas in the first gas path pushes the valve core of the pressure selector to move, cutting off the second gas path and supplying gas to the actuator.

[0024] Beneficial effects: When the control valve is opened, the gas in the first gas path directly drives the pressure selector valve core to move, realizing the dual function of high-pressure gas as both a working medium and a power source for driving the shuttle valve switching. No additional driving components are required, simplifying the device structure. At the same time, it can quickly cut off the second gas path, avoiding the mixing of high and low pressure gas paths, allowing the high-pressure gas in the first gas path to directly and quickly fill the actuator, realizing rapid switching from low pressure to high pressure, improving the switching efficiency of the low-pressure to high-pressure stage, and ensuring the rapid establishment of the winding machine process pressure. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the first implementation of the present invention; Figure 3 This is a schematic diagram of a second implementation of the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. First air path; 2. Second air path; 3. Actuator; 4. Control valve; 5. Pressure selector; 51. First air inlet; 52. Second air inlet; 53. Air outlet; 6. Exhaust valve; 7. Feedback branch; 71. Branch control valve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, a pneumatic pressure switching device for a winding machine is provided, comprising: a first air passage 1 and a second air passage 2, the first air passage 1 and the second air passage 2 being respectively connected to an actuator 3; a control valve 4, the control valve 4 being disposed in the first air passage 1; and a pressure selector 5, the pressure selector 5 including a first air inlet 51, a second air inlet 52 and an air outlet 53, the first air inlet 51 being disposed between the first air passage 1 and the actuator 3, the second air inlet 52 being disposed between the second air passage 2 and the actuator 3, and the air outlet 53 being connected to the actuator 3.

[0031] In this embodiment, the first air path 1 is a high-pressure air path, the second air path 2 is a low-pressure air path, the actuator 3 is an actuator cylinder, and the external compressed air is divided into two paths after precision filtration to form a high-pressure air path and a low-pressure air path, both of which are connected to the actuator cylinder. The control valve 4 is located in the high-pressure air path. The first air inlet 51 of the pressure selector 5 is connected to the high-pressure air path and the actuator cylinder, the second air inlet 52 is connected to the low-pressure air path and the actuator cylinder, and the air outlet 53 is directly connected to the actuator cylinder, thus constructing an air path architecture with separate intake and exhaust.

[0032] By setting up independent first air path 1 and second air path 2, and constructing an air path architecture with separate intake and exhaust, along with control valve 4 and pressure selector 5, the technical problem of shared intake and exhaust passages and mutual constraints between intake and exhaust in traditional winder air pressure switching devices is fundamentally solved. This achieves orderly switching of air paths, effectively shortens air pressure switching time, and allows the contact pressure changes between the yarn package and the grooved drum to better match process requirements, improving the anti-overlapping effect. Moreover, the overall device structure is simple and adaptable to the pneumatic control scenarios of automatic winders.

[0033] Furthermore, an exhaust valve 6 is also provided between the control valve 4 and the first air inlet 51. In this embodiment, the exhaust valve 6 is a fast exhaust valve 6, which is connected in series between the air outlet 53 of the control valve 4 and the first air inlet 51 of the pressure selector 5. The exhaust port of the fast exhaust valve 6 is directly open to the atmosphere, providing a dedicated passage for the gas to be discharged from the gas path. The addition of the exhaust valve 6 between the control valve 4 and the first air inlet 51 of the pressure selector 5 can provide a low-resistance exhaust path for the high-pressure gas in the actuator 3 to directly reach the atmosphere, realize ultra-fast exhaust of the gas in the actuator 3, significantly shorten the time of the exhaust stage, further accelerate the overall gas pressure switching process, make the pressure response speed of the device better, and better meet the requirements of the high-speed process of the winding machine.

[0034] Furthermore, it also includes a feedback branch 7, one end of which is connected to the pipeline between the air outlet 53 and the actuator 3, and the other end is connected to the second air passage 2. The feedback branch 7 is equipped with a branch control valve 71. One end of the feedback branch 7 is connected to the pipeline between the air outlet 53 of the pressure selector 5 and the actuator cylinder, and the other end is connected before the connection point between the low-pressure air passage and the second air inlet 52 of the pressure selector 5. The branch control valve 71 is a two-position two-way solenoid valve, connected in series with the feedback branch 7, to achieve precise control of the on / off state of the feedback branch 7. The addition of a feedback branch 7 with a branch control valve 71 allows residual high-pressure gas in the actuator 3 to be directed to the second air inlet 52 of the pressure selector 5 during high-pressure to low-pressure switching. This creates instantaneous high pressure that actively drives the valve core of the pressure selector 5, enabling parallel exhaust and valve core switching actions. This overcomes the limitations of traditional passive waiting for pressure difference to achieve valve core switching, significantly shortening the response time of gas path switching. At the same time, the branch control valve 71 is linked with the main control valve 4, ensuring gas path isolation and stability in all states of the system, and preventing gas leakage from affecting the switching effect and pressure stability.

[0035] Specifically, control valve 4 is a solenoid valve with a diameter of not less than 6mm, used to switch the gas source of the first gas path 1 on and off and to exhaust gas from the first gas path 1. Control valve 4 is a two-position three-way solenoid valve with a diameter of Φ6mm, connected in series in the high-pressure gas path. This solenoid valve can quickly control the on / off of the gas source of the high-pressure gas path. At the same time, when the gas source is cut off, it serves as an exhaust channel for the high-pressure gas path to discharge gas, and the diameter specification ensures that the high-pressure gas path has sufficient exhaust flow.

[0036] Furthermore, the pressure selector 5 is a shuttle valve. The shuttle valve drives the valve core to move through the pressure difference between the first air path 1 and the second air path 2, realizing automatic switching of the air path. The two air inlets of the shuttle valve are the first air inlet 51 and the second air inlet 52 mentioned above, which are respectively connected to the high-pressure air path and the low-pressure air path downstream of the solenoid valve. The shuttle valve relies on the driving force formed by the air pressure difference between the high-pressure air path and the low-pressure air path to realize the autonomous movement of the valve core, thereby completing the automatic switching between the high-pressure air path and the low-pressure air path without the need for additional control circuit driving. By selecting the shuttle valve as the pressure selector 5, the valve core movement and automatic air path switching are realized by utilizing the purely mechanical pressure difference driving characteristics of the shuttle valve. There is no need to add additional control circuits, which simplifies the control logic of the device, reduces the possibility of circuit failure, makes the system operation more stable and reliable, and the mechanical structure of the shuttle valve has a long service life, which can be adapted to the industrial scenario of long-term continuous operation of the winding machine, reducing the frequency and cost of equipment maintenance.

[0037] Furthermore, both the first air passage 1 and the second air passage 2 are equipped with pressure regulating components at their inlet ends. These components are used to stabilize the air supply pressure of the corresponding air passages. The pressure regulating components are pressure regulating valves. The high-pressure air passage has a first pressure regulating valve at its inlet end, and the low-pressure air passage has a second pressure regulating valve at its inlet end. After the external compressed air is regulated by the two pressure regulating valves, a stable high-pressure air passage and a low-pressure air passage are formed, avoiding the impact of air source pressure fluctuations on the air passage switching effect.

[0038] Furthermore, the working air pressure of the first air path 1 is 1.5-2.0 bar, and the working air pressure of the second air path 2 is 0.5-1.2 bar. The working air pressure of the high-pressure air path after being stabilized by the pressure regulating valve is 2.0 bar, and the working air pressure of the low-pressure air path after being stabilized by the pressure regulating valve is 0.7 bar. This pressure difference can provide sufficient and appropriate differential pressure driving force for the movement of the shuttle valve core, ensuring that the shuttle valve core moves quickly and reliably.

[0039] Furthermore, the control valve 4, in conjunction with the pressure selector 5, ensures that the overall pressure switching time of the device does not exceed 450ms. A two-position three-way solenoid valve and a shuttle valve form a high-speed response control component. Actual measurements show that the switching time from high pressure to low pressure is 250ms, and the switching time from low pressure to high pressure is 160ms, both meeting the requirement of an overall pressure switching time not exceeding 450ms. The combination of control valve 4 and pressure selector 5 achieves a high-speed air pressure switching time of no more than 450ms, completely solving the problems of long switching times and pressure changes lagging behind process requirements in traditional devices. This allows the contact pressure changes between the yarn package and the winding drum to be precisely synchronized with the anti-overlap control process requirements of the winding machine, effectively improving the anti-overlap effect, reducing yarn wear during winding, significantly improving yarn quality, and adapting to the process development needs of high-speed winding, providing reliable pneumatic control support for high-speed winding machines.

[0040] In one embodiment, when the control valve 4 is closed, the pressure selector 5 isolates the second air path 2 and forms an exhaust passage to release the gas inside the actuator 3. In this embodiment, when the two-position three-way solenoid valve is closed, cutting off the gas supply to the high-pressure air path, the shuttle valve first isolates the low-pressure air path and simultaneously forms an exhaust passage in cooperation with the solenoid valve. The high-pressure gas inside the actuator cylinder can be quickly released through this exhaust passage, and the exhaust process is not affected by the low-pressure air path. The pressure selector 5 can automatically isolate the second air path 2 and form an exhaust passage when the control valve 4 is closed, which can prevent the gas from the second air path 2 from entering the actuator 3 during the exhaust stage and causing exhaust interference. This achieves complete and undisturbed exhaust of the gas inside the actuator 3, ensuring the efficiency of the exhaust stage. At the same time, isolating the second air path 2 can prevent pressure disturbance caused by the interconnection of high and low pressure air paths, ensuring that the set pressure can be quickly and stably established when the low-pressure air path is connected, thus improving the overall stability and accuracy of the pressure switching.

[0041] In one embodiment, when the control valve 4 is open, the gas in the first air path 1 pushes the valve core of the pressure selector 5 to move, cutting off the second air path 2 and supplying air to the actuator 3. In this embodiment, when the two-position three-way solenoid valve is opened, opening the air supply to the high-pressure air path, the high-pressure gas in the high-pressure air path directly acts on the valve core of the shuttle valve and pushes it to move. During the movement of the valve core, the low-pressure air path is quickly cut off to prevent the high and low pressure air paths from being connected. At the same time, the high-pressure gas quickly enters the actuator cylinder through the air outlet 53 of the shuttle valve, completing the supply of air to the actuator 3 and the establishment of pressure.

[0042] When control valve 4 is opened, the gas in the first gas path 1 directly drives the valve core of pressure selector 5 to move, realizing the dual function of high-pressure gas as both a working medium and a power source for driving shuttle valve switching. No additional driving components are needed, simplifying the device structure. At the same time, it can quickly cut off the second gas path 2, avoiding the mixing of high and low pressure gas paths, allowing the high-pressure gas in the first gas path 1 to directly and quickly fill the actuator 3, realizing rapid switching from low pressure to high pressure, improving the switching efficiency of the low-pressure to high-pressure stage, and ensuring the rapid establishment of the winding machine process pressure.

[0043] This design consists of a high-pressure air circuit, a low-pressure air circuit, a two-position three-way solenoid valve, a shuttle valve, and an actuator cylinder. Its working process is divided into two stages: high-pressure to low-pressure switching and low-pressure to high-pressure switching. ① High-pressure to low-pressure switching: When switching from high pressure to low pressure is required, the two-position three-way solenoid valve closes, cutting off the 2.0 bar high-pressure air source. At this time, the shuttle valve isolates the low-pressure air path and, in conjunction with the solenoid valve, forms an exhaust passage. The original high-pressure gas in the actuator cylinder is quickly discharged through the exhaust ports of the shuttle valve and the solenoid valve. For example, in actual use, the low-pressure air path is set to 0.7 bar. When the pressure in the cylinder drops below 0.7 bar, the shuttle valve core moves automatically under the pressure difference between the high and low pressure air paths, cutting off the high-pressure exhaust passage and connecting the low-pressure air path. The 0.7 bar low-pressure gas quickly enters the actuator cylinder, completing the high-pressure to low-pressure switching. This process takes 250 ms in actual measurements.

[0044] ② Low-pressure to high-pressure switching: When switching from low pressure to high pressure is required, the two-position three-way solenoid valve opens, and 2.0 bar high-pressure gas enters the system through the solenoid valve. The high-pressure gas directly pushes the shuttle valve core to move, instantly cutting off the low-pressure gas path and preventing pressure turbulence caused by connecting the high and low-pressure gas paths. At the same time, the high-pressure gas quickly fills the actuator cylinder through the shuttle valve outlet 53, completing the low-pressure to high-pressure switching. This process was measured to take 160 ms.

[0045] The working process of the first improved scheme: Improved scheme one adds a fast exhaust valve 6 between the air outlet 53 of the two-position three-way solenoid valve and the first air inlet 51 of the shuttle valve in the basic scheme. Its low-pressure to high-pressure switching process is the same as the basic scheme, only the exhaust link of the high-pressure to low-pressure switching is optimized. It is expected that the switching time will be shortened to less than 150ms. The specific working process is as follows: ① High-pressure to low-pressure switching: When switching from high pressure to low pressure is required, the two-position three-way solenoid valve closes, cutting off the 2.0 bar high-pressure gas supply. Simultaneously, the downstream rapid exhaust valve 6 quickly switches to exhaust mode due to the disappearance of inlet pressure, directly venting the high-pressure gas in the actuator cylinder and connecting pipeline to the atmosphere, achieving ultra-fast exhaust. Subsequently, when the pressure inside the cylinder drops below 0.7 bar, the shuttle valve core automatically moves under the action of the pressure difference, connecting the low-pressure gas path. The low-pressure gas quickly enters the actuator cylinder to complete the switching. The remaining process is consistent with the basic scheme.

[0046] ② Low pressure to high pressure switching: Completely consistent with the basic scheme, after the two-position three-way solenoid valve is opened, the high pressure gas pushes the shuttle valve core to cut off the low pressure gas path and connect the high pressure gas path, quickly supplying gas to the actuator cylinder to establish high pressure. The rapid exhaust valve 6 does not operate during this process and does not affect the high pressure establishment efficiency.

[0047] The working process of the second improved scheme: Improved scheme two adds a feedback branch 7 with a two-position two-way solenoid valve based on improved scheme one. The branch control valve 71 is linked with the main control valve 4 for control. This scheme further optimizes the valve core movement link when switching from high pressure to low pressure. It is expected that the switching time will be shortened to less than 100ms. Its working process is as follows: ① High-pressure to low-pressure switching: When switching from high pressure to low pressure is required, the two-position three-way solenoid valve closes, cutting off the 2.0 bar high-pressure gas supply. Simultaneously, the control system sends an opening signal to the two-position two-way solenoid valve on feedback branch 7, opening branch control valve 71 and connecting feedback branch 7. The high-pressure gas in the actuator cylinder is discharged directly and at high speed to the atmosphere through the rapid exhaust valve 6, and simultaneously acts instantaneously on the second air inlet 52 of the shuttle valve through the connected feedback branch 7. This instantaneous pressure is 0.7 bar higher than that of the low-pressure gas path, enabling a faster and more powerful push on the shuttle valve core, completing the switch to the low-pressure gas path ahead of schedule. Afterward, the system completes the remaining exhaust through the rapid exhaust valve 6, and the gas from the low-pressure gas path enters the actuator cylinder and is stably supplied, completing the entire switching process.

[0048] ② Low-pressure to high-pressure switching: When switching from low pressure to high pressure is required, the control system opens the two-position three-way solenoid valve in the main circuit while simultaneously closing the two-position two-way solenoid valve on feedback branch 7 to prevent high-pressure gas leakage to the low-pressure side. After the two-position three-way solenoid valve opens, the 2.0 bar high-pressure gas pushes the shuttle valve core to move, cutting off the low-pressure gas path. At the same time, the high-pressure gas quickly fills the actuator cylinder, completing the low-pressure to high-pressure switching. The measured time is 160 ms.

[0049] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A pneumatic pressure switching device for a winding machine, characterized in that, include: The first air passage (1) and the second air passage (2) are respectively connected to the actuator (3); Control valve (4), the control valve (4) is disposed in the first air passage (1); Pressure selector (5), the pressure selector (5) includes a first air inlet (51), a second air inlet (52) and an air outlet (53), the first air inlet (51) is disposed between the first air passage (1) and the actuator (3), the second air inlet (52) is disposed between the second air passage (2) and the actuator (3), and the air outlet (53) is connected to the actuator (3).

2. The pneumatic switching device for a winding machine according to claim 1, characterized in that, An exhaust valve (6) is also provided between the control valve (4) and the first air inlet (51).

3. The pneumatic pressure switching device for a winding machine according to claim 2, characterized in that, It also includes a feedback branch (7), one end of which is connected to the pipeline between the air outlet (53) and the actuator (3), and the other end is connected to the second air path (2). The feedback path is equipped with a branch control valve (71).

4. The pneumatic pressure switching device for a winding machine according to claim 1, characterized in that, The control valve (4) is a solenoid valve with a diameter of not less than 6mm, used to switch the gas source of the first gas path (1) on and off and to exhaust the gas from the first gas path (1).

5. The pneumatic switching device for a winding machine according to claim 1, characterized in that, The pressure selector (5) is a shuttle valve. The shuttle valve drives the valve core to move through the pressure difference between the first air path (1) and the second air path (2), thereby realizing the automatic switching of the air path.

6. The pneumatic pressure switching device for a winding machine according to claim 1, characterized in that, The first air passage (1) and the second air passage (2) are both equipped with pressure regulating components at their air inlet ends. The pressure regulating components are used to stabilize the air supply pressure of the corresponding air passage.

7. The pneumatic pressure switching device for a winding machine according to claim 1, characterized in that, The working pressure of the first air passage (1) is 1.5-2.0 bar, and the working pressure of the second air passage (2) is 0.5-1.2 bar.

8. The pneumatic switching device for a winding machine according to claim 1, characterized in that, The control valve (4) works in conjunction with the pressure selector (5) to ensure that the overall pressure switching time of the device is no more than 450ms.

9. The pneumatic switching device for a winding machine according to claim 1, characterized in that, The pressure selector (5) isolates the second gas path (2) and forms an exhaust passage when the control valve (4) is closed, releasing the gas in the actuator (3).

10. The pneumatic switching device for a winding machine according to claim 1, characterized in that, When the control valve (4) is opened, the gas in the first gas path (1) pushes the valve core of the pressure selector (5) to move, cuts off the second gas path (2) and supplies gas to the actuator (3).

Images