Valve timing control device

Abstract

The present invention relates to a valve timing control device for controlling the opening and closing of a valve having a first pneumatic cylinder and a second pneumatic cylinder. The valve timing control device comprises a first valve body, a first control piston block and a second control piston block. The first valve body has a first air port and a second air port. The first control piston block is movably located in a first chamber of the first valve body. The second control piston block is movably located in a second chamber of the first control piston block. When air is supplied to the first air port, the air is first output to the second pneumatic cylinder via the second air port. When the second pneumatic cylinder reaches a saturation state, the air can further push the first control piston block to move, so that the air is output to the first pneumatic cylinder instead. The valve timing control effect is achieved by using the air transmission method.

Description

Technical Field

[0001] This invention relates to a control valve, and more particularly to a valve timing control device. Background Technology

[0002] Vacuum valves are commonly used in vacuum process chambers to selectively close or open the chamber for vacuuming processes. Traditional vacuum valves mostly use solenoid valves to control the pneumatic sequence; however, solenoid valves are prone to failure due to prolonged switching and have a relatively short lifespan. Furthermore, while there are technologies that use pneumatic control for vacuum valves, these often employ multiple gas input ports to control multiple pneumatic cylinders, resulting in numerous components, complex structures, and relatively unstable operation. Therefore, it is clear that with the rapid advancements in modern technology and the continuous pursuit of nanotechnology and high-precision control, traditional technologies still need improvement. Summary of the Invention

[0003] In view of this, one object of the present invention is to provide a valve timing control device to solve the problems of the above-mentioned prior art.

[0004] To achieve the aforementioned objectives, the present invention proposes a valve timing control device suitable for controlling the opening and closing of a valve having a first pneumatic cylinder and a second pneumatic cylinder, comprising: a first valve body having a first chamber and a vent groove; a first control piston block having a second chamber in one of its blocks, and the first control piston block having a first through hole, a second through hole, and a third through hole respectively located on a first side of a first piston pad of the first control piston block; wherein the first valve body has a first vent port and a second vent port, and the first control piston block is movably located in the first chamber of the first valve body, by means of... Based on the position of the second or third through hole on the block of the first control piston block in the vent groove of the first valve body, the first vent is selectively connected to one cylinder chamber of the first pneumatic cylinder via the vent groove and the third through hole, or connected to the second vent via the vent groove, the second through hole and the first through hole to further connect to one cylinder chamber of the second pneumatic cylinder; a second control piston block is movably located in the second chamber of the first control piston block, wherein the second vent is connected to one cylinder chamber of the second pneumatic cylinder of the valve and the first side of the first piston pad of the first control piston block in the first chamber, and the second through hole is based on... The second control piston block selectively opens or closes based on the position of its second piston pad within the second chamber; a first reset element is disposed between a second side of the first piston pad of the first control piston block and the first chamber of the first valve body; and a second reset element is disposed between the second side of the second piston pad of the second control piston block and the second chamber; wherein when a gas is supplied to the first vent of the first valve body, the gas system is output from the second vent to the cylinder chamber of the second pneumatic cylinder; when the cylinder chamber of the second pneumatic cylinder is in a saturated state, the gas system further pushes the first control piston block toward the cylinder chamber away from the first pneumatic cylinder. The direction of the chamber is moved so that the gas enters the cylinder chamber of the first pneumatic cylinder sequentially through the vent groove and the third through hole, thereby pushing one of the piston rods of the first pneumatic cylinder; wherein when the gas supply to the first vent of the first valve body is stopped, the gas system in the cylinder chamber of the first pneumatic cylinder is discharged sequentially through the third through hole, the vent groove and the first vent, and when the piston rod of the first pneumatic cylinder pushes the second control piston block away from the cylinder chamber of the first pneumatic cylinder to open the second through hole, the gas system in the cylinder chamber of the second pneumatic cylinder is discharged sequentially through the first through hole, the second through hole, the vent groove and the first vent.

[0005] It also includes an air valve, which is located between the first air port and the air groove and between the first air port and the cylinder chamber of the first pneumatic cylinder, for selectively connecting or disconnecting the air groove and the cylinder chamber of the first pneumatic cylinder to the first air port.

[0006] The valve includes a second valve body, a third control piston block, and a third reset element. The third control piston block is movably disposed in a third chamber of the second valve body, and the third reset element is disposed between a third piston pad of the third control piston block and the third chamber.

[0007] When a gas supply source supplies gas to the first vent, the gas system sequentially enters the second chamber through the first vent, the vent groove, and the second through hole. The gas further connects to the second vent through the first through hole and the first side of the first piston pad of the first control piston block in the first chamber, so as to output the gas from the second vent to the cylinder chamber of the second pneumatic cylinder.

[0008] When the gas supply source continuously supplies gas to the first vent, but the gas in the cylinder chamber of the second pneumatic cylinder reaches the saturation state, the gas will push the first piston pad of the first control piston block to accumulate the reset force of the first reset element, and cause the third through hole on the block of the first control piston block to be located in the vent groove of the first valve body to connect to the cylinder chamber of the first pneumatic cylinder. The second reset element pushes the second control piston block toward the cylinder chamber of the first pneumatic cylinder, so that the second piston pad of the second control piston block closes the second through hole, thereby causing the gas supplied by the gas supply source to be output sequentially through the vent groove and the third through hole to the cylinder chamber of the first pneumatic cylinder, thereby pushing the piston rod of the first pneumatic cylinder and accumulating the reset force of the fourth reset element of the first pneumatic cylinder.

[0009] When the gas supply source stops supplying gas to the first vent of the first valve body, and the piston rod of the first pneumatic cylinder moves toward the direction close to the valve timing control device by the reset force of the fourth reset element, the gas system in the cylinder chamber of the first pneumatic cylinder passes through the third through hole and the vent groove and is discharged from the first vent.

[0010] When the gas supply source stops supplying gas to the first vent and the pressure of the gas in the cylinder chamber of the first pneumatic cylinder is less than the reset force of the first reset element, the first reset element pushes the first control piston block toward the cylinder chamber of the first pneumatic cylinder.

[0011] When the first reset element pushes the first control piston block toward the cylinder chamber of the first pneumatic cylinder, the piston rod of the first pneumatic cylinder pushes the second control piston block away from the cylinder chamber of the first pneumatic cylinder, thereby accumulating the reset force of the second reset element and causing the second piston pad of the second control piston block to disengage from the second through hole to open the second through hole.

[0012] Wherein, one of the moving axes of the first control piston block in the first chamber is parallel to one of the moving axes of the second control piston block in the second chamber.

[0013] The valve is a pendulum valve. The first pneumatic cylinder controls the horizontal pivoting of one of the valve's gates to move closer to or away from one of the valve's ports. The second pneumatic cylinder controls the gate to abut against or move away from the valve's ports, thereby opening and closing the valve's ports.

[0014] As described above, the present invention may have one or more of the following advantages:

[0015] (1) The gas utilization mechanism achieves a timing control mode by matching the operation of the parts; due to the non-electronic control, it has advantages such as reduced maintenance and long service life, thus replacing the traditional solenoid valve switching control mode.

[0016] (2) The timing of the action of the first pneumatic cylinder and the second pneumatic cylinder of the valve can be controlled according to whether the gas is supplied to a single first ventilation port and whether the gas is output from a single second ventilation port.

[0017] (3) A safety control valve is provided. When the air pressure is insufficient or the air pressure is too low during the opening and closing of the valve, the fourth reset element has a restoring force greater than the insufficient air pressure. In other words, the gas can be discharged from the air valve to the first vent, so that the valve is closed to prevent the leakage and contamination of harmful substances in the process.

[0018] (4) By controlling the pushing direction of the first control piston block and the second control piston block, gas can be supplied to the first pneumatic cylinder and the second pneumatic cylinder of the valve, thereby opening or closing the valve.

[0019] (5) The valve timing control device of the present invention uses a single first and second air port for gas input and output, eliminating the need for multiple gas input and output channels, thus simplifying the means of pneumatic timing control. Moreover, this valve timing control device has a simplified structure and is easier to install on existing pendulum valves.

[0020] To enable you to have a better understanding of the technical features and effects of this invention, preferred embodiments and detailed descriptions are provided below. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the valve timing control device of the present invention installed on a valve, wherein the valve is a pendulum valve.

[0022] Figure 2This is a cross-sectional schematic diagram of the valve timing control device of the present invention installed on a valve, showing the positional relationship between the second pneumatic cylinder of the pendulum valve, the closing piston, and the valve of the pendulum valve.

[0023] Figure 3 This is a cross-sectional schematic diagram of the valve timing control device of the present invention installed on one side of the first pneumatic cylinder of the valve.

[0024] Figure 4 This is a first cross-sectional schematic diagram of the valve timing control device of the present invention, which shows that gas is introduced into the first vent and gas is output from the second vent to the cylinder chamber of the second pneumatic cylinder, that is, the valve gate moves longitudinally to softly open the valve port.

[0025] Figure 5 This is a second cross-sectional schematic diagram of the valve timing control device of the present invention. It shows that the cylinder chamber of the second pneumatic cylinder is in a saturated state, and the gas is introduced from the first vent and then output to the cylinder chamber of the first pneumatic cylinder to push the piston rod of the first pneumatic cylinder, i.e., the gate moves horizontally to fully open the valve port.

[0026] Figure 6 This is a third cross-sectional schematic diagram of the valve timing control device of the present invention. It shows that when the gas supply stops, the piston rod of the first pneumatic cylinder is displaced by the fourth reset element, so that the gas in the cylinder chamber of the first pneumatic cylinder is discharged in reverse through the first vent, that is, the gate moves horizontally to softly seal the valve port.

[0027] Figure 7 This is a fourth cross-sectional schematic diagram of the valve timing control device of the present invention. It shows that the piston rod of the first pneumatic cylinder pushes the second control piston block, and the gas system in the cylinder chamber of the second pneumatic cylinder is discharged in reverse through the first vent, that is, the gate of the valve moves longitudinally to hard seal the valve port.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10: Valve timing control device

[0030] 12: First ventilation port

[0031] 14: Second ventilation port

[0032] 20: First valve body

[0033] 22: First Chamber

[0034] 24: Ventilation slot

[0035] 30: First control piston block

[0036] 32: Block

[0037] 34: Second Chamber

[0038] 36: First through hole

[0039] 38: Second through hole

[0040] 40: Third through hole

[0041] 42: First piston pad

[0042] 50: Second control piston block

[0043] 52: Second piston pad

[0044] 60: First reset element

[0045] 62: Second reset element

[0046] 70: Air valve

[0047] 72: Second valve body

[0048] 74: Third control piston block

[0049] 76: Third reset element

[0050] 78: Third Chamber

[0051] 80: Third piston pad

[0052] 100: Valve

[0053] 110: First pneumatic cylinder

[0054] 112: Cylinder Chamber

[0055] 114: Piston rod

[0056] 116: Fourth reset element

[0057] 118: Pivot mechanism

[0058] 120: Second pneumatic cylinder

[0059] 122: Cylinder Chamber

[0060] 124: Piston rod

[0061] 130: Gate

[0062] 140: Valve port

[0063] 150: Closed piston

[0064] 152: Fifth Reset Element

[0065] 200: Gas supply source Detailed Implementation

[0066] To understand the technical features, content, advantages, and effects of this invention, it is described in detail below with reference to accompanying drawings and embodiments. The drawings used are for illustrative and supplementary purposes only and may not represent the actual scale and precise configuration of the invention in practice. Therefore, the scale and configuration of the accompanying drawings should not be used to interpret or limit the scope of the invention in actual implementation. Furthermore, for ease of understanding, the same elements in the following embodiments are indicated by the same symbols.

[0067] Furthermore, unless otherwise specified, the terms used throughout this specification and claims generally have their ordinary meaning in the context of this art, the disclosure, and the specific content. Certain terms used to describe this invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this invention.

[0068] The use of terms such as "first," "second," and "third" in this article does not specifically refer to order or sequence, nor is it intended to limit this work; it is merely to distinguish components or operations described using the same technical terminology.

[0069] Secondly, when the words “contain,” “include,” “have,” and “contain” are used in this article, they are all open-ended terms, meaning that they include but are not limited to.

[0070] This invention relates to a valve timing control device that utilizes gas transmission to achieve timing control, replacing the traditional solenoid valve switching control method. Please refer to [link / reference]. Figures 1 to 4The valve timing control device 10 of the present invention is suitable for controlling the opening and closing of valve 100. This valve 100 is, for example, a vacuum valve such as a pendulum valve. The valve 100 of the present invention is exemplified by a pendulum valve having a first pneumatic cylinder 110 and a second pneumatic cylinder 120, but is not limited thereto. The first pneumatic cylinder 110, for example, horizontally pivots the gate 130 of valve 100 via a pivoting mechanism 118, thereby controlling the position of the gate 130 to approach (softly seal) or move away from (fully open) the valve port 140 of valve 100. The second pneumatic cylinder 120 controls the gate 130 of valve 100 to abut (hardly seal) or move away from (softly open) the valve port 140 of valve 100. Taking a pendulum valve, which uses a second pneumatic cylinder 120 to drive a closing piston 150 to push a gate 130 and thus control the soft opening or hard closing of the valve port 140 of the valve 100, as an example, the second pneumatic cylinder 120 pushes the closing piston 150 by means of a piston rod 124, causing the closing piston 150 to move towards or away from the gate 130. This controls whether the gate 130 of the valve 100 is against (i.e., hard closed) or not against (i.e. soft open) the valve port 140 of the valve 100, thereby achieving the effect of controlling the closing and opening of the valve 100. When the valve timing control device 10 of the present invention is applied to valves such as pendulum valves, it can conform to the existing valve operation mode without any changes. Moreover, the present invention uses a gas transmission method to achieve the timing control effect, which can have a longer service life than traditional solenoid valve switching control.

[0071] Please see Figures 1 to 4 , Figure 4 This is a first cross-sectional schematic diagram of the valve timing control device of the present invention, showing gas, such as compressed gas, introduced through the first vent 12 and output through the second vent 14 to the cylinder chamber 122 of the second pneumatic cylinder 120, thereby causing the gate 130 of the valve 100 to longitudinally move away from the valve port 140 to softly open the valve port 140. The valve timing control device 10 of the present invention is installed on one side of the cylinder chamber 112 of the first pneumatic cylinder 110 of the valve 100, and the valve timing control device 10 of the present invention is connected to the gas supply source 200 through the first vent 12 and to the second pneumatic cylinder 120 of the valve 100 through the second vent 14, thereby using the gas supplied by the external gas supply source 200 to control the opening and closing of the valve 100. Specifically, the valve timing control device 10 of the present invention includes a first valve body 20, a first control piston block 30, a second control piston block 50, a first reset element 60, and a second reset element 62. The first valve body 20 has a first chamber 22 and a vent groove 24. The vent groove 24 is disposed on the first chamber 22, and one side of the first chamber 22 (e.g., Figure 4 The left side of the first valve body 20 shown is connected to one side of the cylinder chamber 112 of the first pneumatic cylinder 110 (e.g., Figure 4 (The right side of the first pneumatic cylinder 110 shown). The block 32 of the first control piston block 30 has a second chamber 34, and the block 32 of the first control piston block 30 has a first through hole 36, a second through hole 38 and a third through hole 40 located on the first side of the first piston pad 42 of the first control piston block 30.

[0072] The first control piston block 30 is movably movable along a moving axis within the first chamber 22 of the first valve body 20. This moving axis is parallel to (preferably overlaps with) the axis of the first chamber 22 of the first valve body 20. Based on the position of the second through hole 38 or the third through hole 40 on the block 32 of the first control piston block 30 within the vent groove 24 of the first valve body 20, i.e., based on the opening and closing state of the second through hole 38 or the third through hole 40, and in conjunction with the position of the second control piston block 50 (described later), the first vent port 12 selectively connects to the cylinder chamber 112 of the first pneumatic cylinder 110 via the vent groove 24 and the third through hole 40, or connects to the second vent port 14 via the vent groove 24, the second through hole 38, and the first through hole 36 to further connect to the cylinder chamber 122 of the second pneumatic cylinder 120. When the first control piston block 30 moves to the far right in the first chamber 22 (e.g., ...), ... Figure 4 As shown), the second through hole 38 and the third through hole 40 are partially located in the vent groove 24, and when the second control piston block 50 moves to the leftmost position in the second chamber 34 (as ... Figure 4 As shown), the second piston pad 52 of the second control piston block 50 will seal the second through hole 38. Specifically, the second piston pad 52 of the second control piston block 50 of the present invention is movable within the second chamber 34, and the first and second sides of the second piston pad 52 remain connected. When the second piston pad 52 moves towards the direction close to the first pneumatic cylinder 110 and completely abuts against the wall of the second chamber 34, the second through hole 38 can be sealed.

[0073] The second control piston block 50 of the valve timing control device 10 of the present invention is movably movable along a moving axis within the second chamber 34 of the first control piston block 30. This moving axis is parallel to (preferably overlaps with) the axis of the first chamber 22 of the first valve body 20. The moving axis of the first control piston block 30 is parallel to (preferably overlaps with) the moving axis of the second control piston block 50. The second vent 14 connects the cylinder chamber 122 of the second pneumatic cylinder 120 of the valve 100 with the first side of the first piston pad 42 of the first control piston block 30 in the first chamber 22 of the first valve body 20. Based on the position of the second piston pad 52 of the second control piston block 50 within the second chamber 34 of the first control piston block 30, the second vent 14 is selectively connected via the first through hole 36 to the first side of the second piston pad 52 of the second control piston block 50 in the second chamber 34 (e.g., ...). Figure 4(as shown) or connected to the second side of the second piston pad 52 (as shown) Figure 5 (As shown). The first reset element 60 of the valve timing control device 10 of the present invention is disposed between the second side of the first piston pad 42 of the first control piston block 30 and the first chamber 22 of the first valve body 20. The second reset element 62 is disposed between the second side of the second piston pad 52 of the second control piston block 50 and the second chamber 34 of the block 32 of the first control piston block 30. The first reset element 60 and the second reset element 62 are, for example, springs, wherein the elastic coefficient of the first reset element 60 is preferably, but not limited to, greater than, the elastic coefficient of the second reset element 62. Furthermore, the third reset element 76, the fourth reset element 116, and the fifth reset element 152, described later, can all be, for example, springs.

[0074] Therefore, when the gas supply source 200 supplies gas to the first vent 12 of the first valve body 20, the second control piston block 50 is pushed, for example, by the piston rod 114 of the first pneumatic cylinder 110 (e.g. Figure 4 As shown), the second reset element 62 can be compressed to accumulate reset force, so the second through hole 38 on the block 32 of the first control piston block 30 can be connected to the first side of the second piston pad 52 of the second control piston block 50 in the second chamber 34, and the gas can be connected to the second vent 14 through the first through hole 36 and the first side of the first piston pad 32 of the first control piston block 30 in the first chamber 22. Therefore, the gas supplied by the gas supply source 200 can be output from the second vent 14 to the cylinder chamber 122 of the second pneumatic cylinder 120, thereby, for example, by pushing the closing piston 150, causing the closing piston 150 to move in a direction away from the gate 130 of the valve 100, thereby causing the gate 130 to longitudinally move away from the valve port 140 (as shown). Figure 4 (The soft-opening valve port shown).

[0075] When the cylinder chamber 122 of the second pneumatic cylinder 120 is in a saturated state, the gas supplied by the gas supply source 200 can further push the first side of the block 32 of the first control piston block 30, causing the first reset element 60 to accumulate reset force and move in a direction away from the cylinder chamber 112 of the first pneumatic cylinder 110. At the same time, the second reset element 62 can release its reset force, causing the second control piston block 50 to move in a direction close to the cylinder chamber 112 of the first pneumatic cylinder 110, thereby using the second piston pad 52 to seal the second through hole 38. At this time, the vent groove 24 and the third through hole 40 are connected, and the gas supplied by the gas supply source 200 enters the cylinder chamber 112 of the first pneumatic cylinder 110 through the first vent port 12, the vent groove 24 and the third through hole 40, thereby pushing the piston rod 114 of the first pneumatic cylinder 110 to move away from the first valve body 20, so that the gate 130 is horizontally moved away from the valve port 140, thus offsetting the position of the valve port 140 (e.g., Figure 5(The fully open valve port is shown).

[0076] When the gas supply source 200 stops supplying gas to the first vent 12 of the first valve body 20, the fourth reset element 116 of the first pneumatic cylinder 110 releases its reset force, causing the piston rod 114 to move towards the valve timing control device 10. This allows the gas in the cylinder chamber 112 of the first pneumatic cylinder 110 to be discharged sequentially through the third through hole 40, the vent groove 24, and the first vent 12. This also allows the gate 130 to move horizontally towards the valve port 140, thereby overlapping the position of the valve port 140 (e.g., ...). Figure 6 (The soft-sealed valve port is shown). When the fourth reset element 116 of the first pneumatic cylinder 110 releases its reset force, and the piston rod 114 continues to push the second control piston block 50 away from the cylinder chamber 112 of the first pneumatic cylinder 110, the second piston pad 52 will leave the second through hole 38, thereby opening the second through hole 38. Therefore, the gas in the cylinder chamber 122 of the second pneumatic cylinder 120 can be discharged sequentially through the first through hole 36, the second through hole 38, the vent groove 24 and the first vent port 12. Therefore, the fifth reset element 152 will release its reset force, thereby pushing the piston rod 128 of the second pneumatic cylinder 120 towards the gate 130 to close the closing piston 150. Therefore, the closing piston 150 can longitudinally push the gate 130 of the valve 100 to abut the valve port 140, thereby sealing the valve port 140 (as shown). Figure 7 (The hard-seal valve port shown).

[0077] To elaborate, such as Figures 1 to 4 As shown, in the step of softly opening the valve port 140 of the gate 130 of the valve 100, the gas supply source 200 supplies gas to the first vent 12 of the first valve body 20. This gas can sequentially enter the second chamber 34 through the first vent 12, the vent groove 24, and the second through hole 38, so that the gas (such as...) Figure 4 (As indicated by the arrow) it connects to the second vent 14 via the first through hole 36 and the first side of the first piston pad 42 of the first control piston block 30 in the first chamber 22, thereby outputting gas from the second vent 14 to the cylinder chamber 122 of the second pneumatic cylinder 120. Therefore, the piston rod 124 of the second pneumatic cylinder 120 can push the closing piston 150, causing the closing piston 150 to move away from the gate 130 of the valve 100 in a direction away from the valve port 140 of the valve 100, thereby causing the gate 130 of the valve 100 to move longitudinally away from the valve port 140 (as shown by the arrow). Figure 4 (The soft-opening valve port shown).

[0078] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, in the step of fully opening the valve port 140 of the gate 130 of the valve 100, when the gas supply source 200 continuously supplies gas to the first vent 12, but the gas in the cylinder chamber 122 of the second pneumatic cylinder 120 reaches a saturated state, the gas supplied by the gas supply source 200 can further push the first piston pad 42 of the first control piston block 30 from the first side of the first piston pad 42 of the first control piston block 30 in the first chamber 22 (e.g., Figure 5 (As indicated by the dark arrow) to open the third through hole 40, at which time the first reset element 60 is compressed to accumulate reset force. Furthermore, the gas entering the second chamber 34 of the first control piston block 30 through the first through hole 36 pushes the second piston pad 52 of the second control piston block 50 towards the cylinder chamber 112 of the first pneumatic cylinder 110. Simultaneously, the second reset element 62 can push the second piston pad 52 of the second control piston block 50 towards the cylinder chamber 112 of the first pneumatic cylinder 110, thereby completely closing the second through hole 38 using the second piston pad 52. Therefore, the first vent 12 will be unable to supply gas to the second vent 14 through the second through hole 38 on the block 32 of the first control piston block 30. Furthermore, since the third through hole 40 on the block 32 of the first control piston block 30 is located in the vent groove 24 of the first valve body 20 at this time, the first vent port 12 can be connected to the cylinder chamber 112 of the first pneumatic cylinder 110 via the third through hole 40 (e.g., Figure 5 (The light-colored arrows indicate the direction). In other words, the gas supplied by the gas supply source 200 will be sequentially output through the vent 24 and the third through hole 40 to the cylinder chamber 112 of the first pneumatic cylinder 110, thereby pushing the piston rod 114 of the first pneumatic cylinder 110 away from the first valve body 20, which in turn actuates the gate 130 away from the valve port 140 of the valve 100 to fully open the valve port 140, and can accumulate the reset force of the fourth reset element 116 of the first pneumatic cylinder 110.

[0079] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, in the step of softly sealing the valve port 140 of the gate 130 of the valve 100, when the gas supply source 200 stops supplying gas, the piston rod 114 of the first pneumatic cylinder 110 generates displacement by releasing the reset force of the fourth reset element 116, causing the gas in the cylinder chamber 112 of the first pneumatic cylinder 110 to pass in the reverse direction through the third through hole 40 and the vent groove 24 and be discharged from the first vent port 12 (as shown). Figure 6(As indicated by the light-colored arrow), and by means of the piston rod 114 of the first pneumatic cylinder 110, the position of the gate 130 is changed from being offset from the valve port 140 to being overlapping the valve port 140, that is, the gate 130 moves horizontally to softly seal the valve port 140. During the movement of the piston rod 114 of the first pneumatic cylinder 110 towards the first valve body 20, before the second control piston block 50 is pushed, the second through hole 38 is still closed by the second piston pad 52. Therefore, the cylinder chamber 122 of the second pneumatic cylinder 120 can remain in a pressurized state, that is, the closing piston 150 can remain in a state where it does not abut against the gate 130 of the valve 100.

[0080] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, in the step of the gate 130 hard-sealing the valve port 140 of the valve 100, when the gas supply source 200 stops supplying gas and the gas pressure in the cylinder chamber 112 of the first pneumatic cylinder 110 is less than the reset force of the first reset element 60, the first reset element 60 can release the reset force to push the first control piston block 30 toward the cylinder chamber 112 of the first pneumatic cylinder 110. The piston rod 114 of the first pneumatic cylinder 110 can move toward the second control piston block 50 by the reset force of its fourth reset spring 116, and push the second piston pad 52 of the second control piston block 50, thereby causing the second piston pad 52 to disengage from the second through hole 38 and open the second through hole 38. Therefore, the gas in the cylinder chamber 122 of the second pneumatic cylinder 120 can sequentially pass through the first through hole 36, the second through hole 38, and the vent groove 24 and be discharged from the first vent port 12. Therefore, the fifth reset element 152 can push the closing piston 150 by releasing the reset force, causing the closing piston 150 to push the gate 130 of the valve 100 towards the gate 130, thereby causing the gate 130 of the valve 100 to longitudinally abut against the valve port 140 to seal the valve port 140 (e.g., Figure 7 (The hard-sealed valve port shown).

[0081] In addition, such as Figures 1 to 7As shown, the valve timing control device of the present invention selectively includes a pneumatic valve 70. This pneumatic valve 70 can be a three-way structure, for example, located between the first vent port 12 and the vent groove 24, and between the cylinder chamber 112 of the first pneumatic cylinder 110 and the first vent port 12, to selectively connect or disconnect the vent groove 24 and the cylinder chamber 112 of the first pneumatic cylinder 110 to the first vent port 12. Specifically, this pneumatic valve 70 includes a second valve body 72, a third control piston block 74, and a third reset element 76. The third control piston block 74 is movably disposed in the third chamber 78 of the second valve body 72, and the third reset element 76 is disposed between the third piston pad 80 of the third control piston block 74 and the third chamber 78. The second valve body 72 can, for example, be located on one side of the first valve body 20, and can be as follows: Figure 7 The first valve body 20 is integrally formed as shown. When the gas pressure supplied by the gas supply source 200 is greater than the reset force of the third reset element 76, the gas can push the third reset element 76 away from the cylinder chamber 112 of the first pneumatic cylinder 110, causing it to accumulate reset force and connecting the vent groove 24 and the cylinder chamber 112 of the first pneumatic cylinder 110 to the first vent port 12. In other words, if the gas pressure supplied by the gas supply source 200 is insufficient to push the third reset element 76, the valve 70 can activate a safety mechanism, releasing the reset force of the third reset element 76, thus preventing the vent groove 24 and the cylinder chamber 112 of the first pneumatic cylinder 110 from connecting to the first vent port 12. That is, when the gas pressure or the gas pressure during the opening and closing of valve 100 is insufficient, valve 70 will automatically close the passage between the first pneumatic cylinder 110 and the first air port 12 and the passage between the second pneumatic cylinder 120 and the first air port 12, thus avoiding the leakage of harmful substances in the process of using valve 100 and affecting personnel safety.

[0082] In summary, the valve timing control device of the present invention provides the following advantages:

[0083] (1) The timing control is achieved by using gas transmission, which can replace the traditional solenoid valve switching control method that is prone to failure; and because it uses gas supply, its lifespan is longer than that of solenoid valves.

[0084] (2) The timing of the action of the first pneumatic cylinder and the second pneumatic cylinder of the valve can be controlled according to whether the gas is supplied to a single first ventilation port and whether the gas is output from a single second ventilation port.

[0085] (3) A safety control valve is provided. When the air pressure is insufficient or the air pressure is too low during the opening and closing of the valve, the fourth reset element has a restoring force greater than the insufficient air pressure. That is, the gas can be discharged from the air valve to the insufficient air pressure, and the first external air port can be automatically closed, so that the valve is closed to prevent the leakage and pollution of harmful substances in the process.

[0086] (4) By controlling the pushing direction of the first control piston block and the second control piston block, gas can be supplied to the first pneumatic cylinder and the second pneumatic cylinder of the valve, thereby opening or closing the valve.

[0087] (5) The valve timing control device of the present invention uses a single first and second air port for gas input and output, eliminating the need for multiple gas input and output channels, thus simplifying the means of pneumatic timing control. Moreover, this valve timing control device has a simplified structure and is easier to install on existing pendulum valves.

[0088] The above description is merely illustrative and not restrictive. Any equivalent modifications or alterations made without departing from the spirit and scope of this invention should be included in the appended claims.

Claims

1. A valve timing control device, suitable for controlling the opening and closing of a valve having a first pneumatic cylinder and a second pneumatic cylinder, characterized in that, Include: A first valve body having a first chamber and a vent groove; A first control piston block, wherein one block of the first control piston block has a second chamber, and the block of the first control piston block has a first through hole, a second through hole and a third through hole respectively located on a first side of one of the first piston pads of the first control piston block; The first valve body has a first vent and a second vent. The first control piston block is movably located in the first chamber of the first valve body. Based on the position of the second or third through hole on the first control piston block in the vent groove of the first valve body, the first vent can selectively connect to a cylinder chamber of the first pneumatic cylinder via the vent groove and the third through hole, or connect to the second vent via the vent groove, the second through hole and the first through hole to further connect to a cylinder chamber of the second pneumatic cylinder. A second control piston block is movably located in the second chamber of the first control piston block, wherein the second vent is connected to a cylinder chamber of the second pneumatic cylinder of the valve and the first side of the first piston pad of the first control piston block in the first chamber, and the second through hole is selectively opened or closed according to the position of the second piston pad of the second control piston block in the second chamber; A first reset element is disposed between a second side of the first piston pad of the first control piston block and the first chamber of the first valve body; and A second reset element is disposed between a second side of the second piston pad of the second control piston block and the second chamber; When a gas is supplied to the first vent of the first valve body, the gas system outputs from the second vent to the cylinder chamber of the second pneumatic cylinder. When the cylinder chamber of the second pneumatic cylinder is in a saturated state, the gas system further pushes the first control piston block to move away from the cylinder chamber of the first pneumatic cylinder, so that the gas enters the cylinder chamber of the first pneumatic cylinder sequentially through the vent groove and the third through hole, thereby pushing one of the piston rods of the first pneumatic cylinder. When the gas supply to the first vent of the first valve body is stopped, the gas system in the cylinder chamber of the first pneumatic cylinder is discharged sequentially through the third through hole, the vent groove and the first vent. When the piston rod of the first pneumatic cylinder pushes the second control piston block away from the cylinder chamber of the first pneumatic cylinder to open the second through hole, the gas system in the cylinder chamber of the second pneumatic cylinder is discharged sequentially through the first through hole, the second through hole, the vent groove and the first vent.

2. The valve timing control device as described in claim 1, characterized in that, It also includes an air valve, which is disposed between the first air port and the air groove and between the first air port and the cylinder chamber of the first pneumatic cylinder, for selectively connecting or disconnecting the air groove and the cylinder chamber of the first pneumatic cylinder to the first air port.

3. The valve timing control device as described in claim 2, characterized in that, The valve includes a second valve body, a third control piston block, and a third reset element. The third control piston block is movably disposed in a third chamber of the second valve body, and the third reset element is disposed between a third piston pad of the third control piston block and the third chamber.

4. The valve timing control device as described in claim 1 or 2, characterized in that, When a gas supply source supplies gas to the first vent, the gas system sequentially enters the second chamber through the first vent, the vent groove, and the second through hole. The gas further connects to the second vent through the first through hole and the first side of the first piston pad of the first control piston block in the first chamber, so as to output the gas from the second vent to the cylinder chamber of the second pneumatic cylinder.

5. The valve timing control device as described in claim 4, characterized in that, When the gas supply source continuously supplies gas to the first vent, but the gas in the cylinder chamber of the second pneumatic cylinder reaches the saturation state, the gas will push the first piston pad of the first control piston block to accumulate the reset force of the first reset element, and cause the third through hole on the block of the first control piston block to be located in the vent groove of the first valve body to connect to the cylinder chamber of the first pneumatic cylinder. The second reset element pushes the second control piston block toward the cylinder chamber of the first pneumatic cylinder, so that the second piston pad of the second control piston block closes the second through hole, thereby causing the gas supplied by the gas supply source to be output sequentially through the vent groove and the third through hole to the cylinder chamber of the first pneumatic cylinder, thereby pushing the piston rod of the first pneumatic cylinder and accumulating the reset force of the fourth reset element of the first pneumatic cylinder.

6. The valve timing control device as described in claim 5, characterized in that, When the gas supply source stops supplying gas to the first vent of the first valve body, and the piston rod of the first pneumatic cylinder moves toward the direction close to the valve timing control device by the reset force of the fourth reset element, the gas system in the cylinder chamber of the first pneumatic cylinder passes through the third through hole and the vent groove and is discharged from the first vent.

7. The valve timing control device as described in claim 6, characterized in that, When the gas supply source stops supplying gas to the first vent and the pressure of the gas in the cylinder chamber of the first pneumatic cylinder is less than the reset force of the first reset element, the first reset element pushes the first control piston block toward the cylinder chamber of the first pneumatic cylinder.

8. The valve timing control device as described in claim 7, characterized in that, When the first reset element pushes the first control piston block toward the cylinder chamber of the first pneumatic cylinder, the piston rod of the first pneumatic cylinder pushes the second control piston block away from the cylinder chamber of the first pneumatic cylinder, thereby accumulating the reset force of the second reset element and causing the second piston pad of the second control piston block to disengage from the second through hole to open the second through hole.

9. The valve timing control device as described in claim 1, characterized in that, The first control piston block has one of its moving axes in the first chamber parallel to one of its moving axes in the second control piston block in the second chamber.

10. The valve timing control device as described in claim 1, characterized in that, The valve is a pendulum valve. The first pneumatic cylinder controls the horizontal pivoting of one of the valve's gates to move closer to or further away from one of the valve's ports. The second pneumatic cylinder controls the gate to abut against or move away from the valve's port, thereby opening and closing the valve's port.

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