Three-position pneumatic propulsion device and vacuum valve

Abstract

The utility model relates to the technical field of pneumatic propulsion devices, and provides a three-position pneumatic propulsion device and a vacuum valve, which comprise a cylinder body, a first piston is movably connected in the cylinder body, and one side of the first piston is provided with a first cavity used for inflating to drive the first piston to retract. The other side of the first piston is provided with a second cavity used for inflating to drive the first piston to extend outwards, and the other side of the first piston is provided with an adjusting assembly used for pulling and limiting the first piston to extend outwards or a second piston used for abutting against and limiting retraction of the first piston. Complete retraction, complete extension and adjustment of any third position between complete retraction and complete extension of the first piston are achieved, and the flexibility and adaptability of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic propulsion devices, in particular to a three-position pneumatic propulsion device and a vacuum valve. Background Art

[0002] Vacuum valves are key components used in vacuum systems. Their main functions are to change the direction of airflow, adjust the amount of airflow, and cut off or connect pipelines. In recent years, the demand for vacuum valves in the traditional vacuum industry has gradually weakened, while the new energy and semiconductor fields have shown broad market potential in China, and the requirements for vacuum valves have also increased.

[0003] In traditional vacuum applications, single-acting or double-acting cylinders are usually used. The entire actuator consists of a cylinder, bellows, and hinge mechanism. The cylinder drives the valve core through linear motion to achieve the valve's on / off function. However, when faced with complex process conditions, a single on / off valve position design obviously cannot meet the needs. Utility Model Content

[0004] The purpose of the utility model is to provide a three-position pneumatic propulsion device and a vacuum valve, which solve the above technical problems and improve the flexibility and adaptability of the device.

[0005] The utility model is realized through the following technical scheme: a three-position pneumatic propulsion device, including a cylinder body, a first piston movably connected inside the cylinder body, one side of the first piston is a first chamber for inflating and driving the first piston to retract, the other side of the first piston is a second chamber for inflating and driving the first piston to extend, and an adjustment component for pulling and limiting the extension of the first piston is provided on the other side of the first piston, the adjustment component includes an adjustment screw and an adjustment nut matched with the thread of the adjustment screw, and the adjustment nut is slidably engaged in the first piston.

[0006] Furthermore, the first piston is provided with a magnetic ring, and a magnetic induction switch cooperating with the magnetic ring is provided on the outer wall of the cylinder body. The positions of the magnetic induction switch correspond to the first piston being fully retracted, the first piston being fully extended, and the first piston being in the middle position between being fully retracted and fully extended.

[0007] Furthermore, it comprises a first solenoid valve, a first interface communicating with the first chamber and a second interface communicating with the second chamber are arranged on the cylinder body, and both the first interface and the second interface are connected with the first solenoid valve through an air pipe.

[0008] A three-position pneumatic propulsion device comprises a cylinder body, in which a first piston is movably connected, one side of the first piston is a first chamber for inflating and driving the first piston to retract, the other side of the first piston is a second chamber for inflating and driving the first piston to extend, the other side of the first piston is provided with a second piston for abutting and limiting the retraction of the first piston, one side of the second piston is a third chamber, the other side of the second piston is a fourth chamber, the third chamber and the second chamber are separated by an intermediate end seat, the force-bearing surface of the second piston on the side of the fourth chamber is larger than the force-bearing surface of the first piston on the side of the first chamber, an adjusting nut is slidably clamped in the second piston, and the adjusting nut is threadedly connected with an adjusting screw for adjusting the sliding distance of the second piston.

[0009] Furthermore, the first piston and the second piston are both provided with magnetic rings, and a magnetic induction switch cooperating with the magnetic ring is provided on the outer wall of the cylinder body. The positions of the magnetic induction switches correspond to the first piston being fully retracted, the first piston being fully extended, and the second piston abutting the first piston and being located in the middle position between fully retracted and fully extended.

[0010] Furthermore, it includes a first solenoid valve and a second solenoid valve, and the cylinder body is provided with a first interface connected to the first chamber, a second interface connected to the second chamber, a third interface connected to the third chamber, and a fourth interface connected to the fourth chamber. The first interface and the second interface are both connected to the first solenoid valve through an air pipe, and the third interface and the fourth interface are both connected to the second solenoid valve through an air pipe.

[0011] A three-position vacuum valve comprises a shell and a valve plate. A cylinder body is installed above the shell. A first piston drives the valve plate to move linearly in the shell through a transmission mechanism.

[0012] The utility model has at least the following advantages and beneficial effects: by arranging a second piston for abutting and limiting the retraction of the first piston or an adjusting component for pulling and limiting the extension of the first piston on one side of the first piston, the first piston can be adjusted to full retraction, full extension and any third position between full retraction and full extension, thereby improving the flexibility and adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the structure of a three-position vacuum valve provided by the utility model;

[0015] Figure 2For the present utility model Figure 1 Internal structure schematic diagram of the structure shown

[0016] Figure 3 For the present utility model Figure 1 Cross-sectional view of the structure shown

[0017] Figure 4 For the present utility model Figure 3 Partial enlarged view at position A in the present utility model

[0018] Figure 5 Another form of cross-sectional view of a three-position vacuum valve provided by the present utility model

[0019] Figure 6 For the present utility model Figure 5 Partial enlarged view at position B in the present utility model

[0020] Icon: 1 - cylinder block, 11 - connecting end seat, 12 - intermediate end seat, 13 - end cover, 14 - cylinder body, 2 - first piston, 3 - second piston, 41 - first chamber, 410 - first interface, 42 - second chamber, 420 - second interface, 43 - third chamber, 430 - third interface, 44 - fourth chamber, 440 - fourth interface, 5 - adjustment assembly, 51 - adjustment screw, 52 - adjustment nut, 6 - magnetic ring, 7 - magnetic induction switch, 81 - first solenoid valve, 82 - second solenoid valve, 91 - housing, 92 - valve plate, 93 - transmission structure Specific embodiments

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model

[0023] Embodiment 1

[0024] As Figures 5 - 6As shown, in this embodiment, a three-position pneumatic propulsion device is mainly disclosed. It has a simple and reliable structure and can achieve the adjustment of the intermediate third position. It includes a cylinder block 1, in which a first piston 2 is movably connected. On one side of the first piston 2 is a first chamber 41 for inflating to drive the first piston 2 to retract, and on the other side of the first piston 2 is a second chamber 42 for inflating to drive the first piston 2 to extend. On the other side of the first piston 2, an adjusting assembly 5 is provided for pulling and restricting the extension of the first piston 2. The adjusting assembly 5 includes an adjusting screw 51 and an adjusting nut 52 that is threadedly engaged with the adjusting screw 51. The adjusting nut 52 is slidably clamped inside the first piston 2. It should be noted that a chute with a regular hexagonal cross-section is formed inside the first piston 2 for placing the adjusting nut 52 with clearance fit, so that the adjusting nut 52 can only slide relative to the first piston 2 without rotating, and it is necessary to ensure that the end of the adjusting screw 51 does not abut against the bottom of the chute. When the first piston 2 retracts, the adjusting screw 51 does not conflict with the first piston 2, ensuring that the first piston 2 can retract completely. When the first piston 2 needs to extend completely, the second chamber 42 is inflated. At this time, the adjusting assembly 5 does not play a limiting role, that is, the adjusting nut 52 is located at the distal end of the adjusting screw 51 and is not within the range of the first chamber 41 and the second chamber 42. Under the action of air pressure, the first piston 2 extends, and the first piston 2 slides relative to the adjusting nut 52 without abutting against the adjusting nut 52. When it is necessary to adjust from the completely retracted state of the first piston 2 to the third position between the completely retracted and completely extended states of the first piston 2, first turn the adjusting screw 51 so that the adjusting nut 52 is within the range of the first chamber 41 and the second chamber 42, and continuously inflate the second chamber 42. The first piston 2 gradually slides out of the cylinder block 1 and then abuts against the adjusting nut 52 for limiting. At this time, by rotating the adjusting screw 51 forward or backward, the relative position of the adjusting nut 52 and the adjusting screw 51 is changed, so as to achieve the adjustment of any intermediate third position of the first piston 2. When it is necessary to adjust from the completely extended state of the first piston 2 to the third position between the completely retracted and completely extended states of the first piston 2, continue to inflate the second chamber 42. At this time, the adjusting screw 51 needs to be rotated to make the adjusting nut 52 move upward relatively, and the adjustment of any intermediate third position of the first piston 2 can be achieved. However, it should be noted that there may be a situation where the adjusting screw 51 idles for a certain angle before the adjustment of any intermediate third position of the first piston 2 can be achieved. Through the setting of the adjusting screw 51 and the adjusting nut 52, the stroke of the first piston 2 can be adjusted, and then the adjustment of any intermediate third position of the first piston 2 can be achieved, improving the adaptability of the device.

[0025] Furthermore, in a specific implementation, the first piston 2 provided in the embodiment of the utility model is provided with a magnetic ring 6, and a magnetic induction switch 7 cooperating with the magnetic ring 6 is provided on the outer wall of the cylinder body 1, and the positions of the magnetic induction switch 7 correspond to the first piston 2 being fully retracted, the first piston 2 being fully extended, and the first piston 2 being located in the middle position between being fully retracted and fully extended, respectively; it should be noted that when the first piston 2 slides to the corresponding position, the corresponding magnetic induction switch 7 senses the magnetic ring 6 and outputs the corresponding position signal, thereby realizing accurate detection of the position of the first piston 2 and improving the sensitivity of the device sensing; in addition, the magnetic induction switch 7 in the middle third position can be set according to actual working conditions; this feedback mechanism can improve the automation level of the system, so that the user can monitor the status of the first piston 2 in real time, thereby improving the safety and accuracy of the device.

[0026] Furthermore, in a specific implementation, the embodiment of the utility model includes a first solenoid valve 81, and a first interface 410 connected to the first chamber 41 and a second interface 420 connected to the second chamber 42 are provided on the cylinder body 1, and the first interface 410 and the second interface 420 are both connected to the first solenoid valve 81 through an air pipe; the air pressure changes in the first chamber 41 and the second chamber 42 are controlled by the first solenoid valve 81 to achieve rapid movement of the first piston 2, thereby improving the response speed of the device.

[0027] Embodiment 2

[0028] like Figures 1 - 4As shown, in the present embodiment, a three-position pneumatic propulsion device is disclosed, including a cylinder body 1, in which a first piston 2 is movably connected, one side of the first piston 2 is a first chamber 41 for inflating and driving the first piston 2 to retract, the other side of the first piston 2 is a second chamber 42 for inflating and driving the first piston 2 to extend, the other side of the first piston 2 is provided with a second piston 3 for abutting and limiting the retraction of the first piston 2, one side of the second piston 3 is a third chamber 43, the other side of the second piston 3 is a fourth chamber 44, the third chamber 43 and the second chamber 42 are separated by an intermediate end seat 12, the force-bearing surface of the second piston 3 on the side of the fourth chamber 44 is larger than the force-bearing surface of the first piston 2 on the side of the first chamber 41, an adjusting nut 52 is slidably clamped in the second piston 3, and the adjusting nut 52 is threadedly connected with an adjusting screw 51 for adjusting the sliding distance of the second piston 3; specifically, a sliding groove with a regular hexagonal cross-section is provided in the second piston 3 for clearance fitting to place the adjusting nut 52, so that the adjusting nut 52 can only be adjusted in the first The two pistons 3 slide relative to each other without rotating; when the first piston 2 needs to be fully retracted, the first chamber 41 is inflated, and the second piston 3 does not play a limiting role; when the first piston 2 needs to be adjusted to a third position between full retraction and full extension, the first chamber 41 is continuously inflated, and under the action of air pressure, the first piston 2 pushes the second piston 3 to gradually achieve full retraction, and then the first chamber 41 is kept continuously inflated, and compressed gas of the same pressure is filled into the fourth chamber 44. Since the force-bearing surface of the second piston 3 on the side of the fourth chamber 44 is greater than the force-bearing surface of the first piston 2 on the side of the first chamber 41, the force generated by the fourth chamber 44 is greater than the force generated by the first chamber 41. Under the action of the pressure difference, the second piston 3 pushes the first piston 2 to begin to extend out of the cylinder body 1 until the second piston 3 abuts against the adjusting nut 52 to generate a limit, and the adjusting screw 51 is screwed to change the relative position of the adjusting screw 51 and the adjusting nut 52, thereby realizing the adjustment of the first piston 2 to any third position between full retraction and full extension.

[0029] Furthermore, in a specific implementation, the first piston 2 and the second piston 3 provided in the embodiment of the utility model are both provided with a magnetic ring 6, and a magnetic induction switch 7 cooperating with the magnetic ring 6 is provided on the outer wall of the cylinder body 1, and the positions of the magnetic induction switch 7 correspond to the first piston 2 being fully retracted, the first piston 2 being fully extended, and the second piston 3 abutting the first piston 2 and being located in the middle position between the full retraction and the full extension; it should be noted that the magnetic induction switch 7 in the middle third position can be set according to actual working conditions, and the corresponding induction is the magnetic ring 6 arranged on the second piston 3.

[0030] Further, in specific implementation, the present utility model includes a first solenoid valve 81 and a second solenoid valve 82. The cylinder block 1 is provided with a first interface 410 communicating with the first chamber 41, a second interface 420 communicating with the second chamber 42, a third interface 430 communicating with the third chamber 43, and a fourth interface 440 communicating with the fourth chamber 44. Both the first interface 410 and the second interface 420 are connected to the first solenoid valve 81 through air pipes, and both the third interface 430 and the fourth interface 440 are connected to the second solenoid valve 82 through air pipes. Through the collaborative control of the first solenoid valve 81 and the second solenoid valve 82, the first piston 2 can be fully retracted, fully extended, and adjusted to the intermediate third position.

[0031] It should be noted that in this embodiment, the cylinder block 1 can be composed of a connecting end seat 11, an intermediate end seat 12, and an end cover 13. The connecting end seat 11, the intermediate end seat 12, and the end cover 13 are all connected by a cylinder body 14. The first piston 2 is detachably connected with an output shaft, and can be disassembled and assembled into the pneumatic propulsion device structure in the first embodiment according to different working condition requirements. For example, the first piston 2, the intermediate end seat 12, and the cylinder body 14 between the intermediate end seat 12 and the end cover 13 in the second embodiment are cancelled, and the second piston 3 in the second embodiment is replaced with the first piston 2 in the first embodiment and connected to the output shaft, which improves the flexibility of the device and reduces the manufacturing cost.

[0032] Embodiment 3

[0033] As Figures 1 - 3 shown in FIGS. 4 and 5, in this embodiment, a three-position vacuum valve is disclosed, which includes a housing 91 and a valve plate 92. The cylinder block 1 is installed above the housing 91, and the first piston 2 drives the valve plate 92 to linearly move within the housing 91 through a transmission mechanism. It should be noted that the transmission mechanism can adopt existing technologies, such as lever transmission. The cylinder block 1 is arranged above the housing 91 in a forward layout form, saving more side space.

[0034] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A three-position pneumatic propulsion device, comprising a cylinder block (1), wherein a first piston (2) is movably connected inside the cylinder block (1), a first chamber (41) for inflating and driving the first piston (2) to retract is on one side of the first piston (2), and a second chamber (42) for inflating and driving the first piston (2) to extend is on the other side of the first piston (2), characterized in that, An adjustment component (5) for pulling and limiting the extension of the first piston (2) is arranged on the other side of the first piston (2); the adjustment component (5) comprises an adjustment screw (51) and an adjustment nut (52) threadably matched with the adjustment screw (51); the adjustment nut (52) is slidably engaged in the first piston (2).

2. The three-position pneumatic propulsion device according to claim 1, wherein, The first piston (2) is provided with a magnetic ring (6), and the outer wall of the cylinder body (1) is provided with a magnetic induction switch (7) cooperating with the magnetic ring (6). The magnetic induction switch (7) is arranged at positions corresponding to when the first piston (2) is fully retracted, when the first piston (2) is fully extended, and when the first piston (2) is located in the middle between the fully retracted and fully extended positions.

3. The three-position pneumatic propulsion device according to claim 1, characterized in that, It comprises a first solenoid valve (81), the cylinder body (1) is provided with a first interface (410) communicating with the first chamber (41) and a second interface (420) communicating with the second chamber (42), the first interface (410) and the second interface (420) both being connected to the first solenoid valve (81) via an air pipe.

4. A three-position pneumatic propulsion device, comprising a cylinder block (1), wherein a first piston (2) is movably connected inside the cylinder block (1), a first chamber (41) for inflating and driving the first piston (2) to retract is on one side of the first piston (2), and a second chamber (42) for inflating and driving the first piston (2) to extend is on the other side of the first piston (2), characterized in that, A second piston (3) is arranged on the other side of the first piston (2) for abutting against and limiting the retraction of the first piston (2); one side of the second piston (3) is a third chamber (43), and the other side of the second piston (3) is a fourth chamber (44); the third chamber (43) and the second chamber (42) are separated by an intermediate end seat (12); the force-bearing surface of the second piston (3) on the side of the fourth chamber (44) is larger than the force-bearing surface of the first piston (2) on the side of the first chamber (41); an adjusting nut (52) is slidably engaged in the second piston (3); the adjusting nut (52) is threadedly connected to an adjusting screw (51) for adjusting the sliding distance of the second piston (3).

5. The three-position pneumatic propulsion device according to claim 4, characterized in that, The first piston (2) and the second piston (3) are both provided with a magnetic ring (6); a magnetic induction switch (7) cooperating with the magnetic ring (6) is provided on the outer wall of the cylinder body (1); the magnetic induction switch (7) is arranged at positions corresponding to the first piston (2) being fully retracted, the first piston (2) being fully extended, and the second piston (3) being in contact with the first piston (2) and being in an intermediate position between being fully retracted and fully extended.

6. The three-position pneumatic propulsion device according to claim 4, characterized in that, The invention comprises a first solenoid valve (81) and a second solenoid valve (82); the cylinder body (1) is provided with a first interface (410) communicating with the first chamber (41), a second interface (420) communicating with the second chamber (42), a third interface (430) communicating with the third chamber (43), and a fourth interface (440) communicating with the fourth chamber (44); the first interface (410) and the second interface (420) are both connected to the first solenoid valve (81) via an air pipe, and the third interface (430) and the fourth interface (440) are both connected to the second solenoid valve (82) via an air pipe.

7. A vacuum valve for a three-position pneumatic propulsion device according to any one of claims 1-6, comprising a housing (91) and a valve plate (92), characterized in that, The cylinder block (1) is installed above the housing (91), and the first piston (2) drives the valve plate (92) to linearly move within the housing (91) through a transmission mechanism.

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