The present invention relates to a vacuum valve. More particularly, the present invention relates to a vacuum valve capable of improving product performance of a packing ring to extend a replacement period of the packing ring. Here, as an opening and closing driving guide groove including a protruding groove section and first and second inclined groove sections is defined in each of both side surfaces of a driving block, and an L-motion roller inserted into and moving along the opening and closing driving guide groove is provided on an L-motion block, when the L-motion roller is disposed at an end of the first inclined groove section, one side surface of a valve blade closes an inlet, and when the L-motion roller is disposed at an end of the second inclined groove section, one side surface of the valve blade closely contacts an inner surface of the housing. Accordingly, the packing ring provided on a closing surface of the valve blade is fundamentally blocked from contacting air or fluid, and thus the product performance of the packing ring is improved to extend the replacement period of the packing ring.
In general, since a semiconductor manufacturing process for manufacturing a semiconductor device requires a high degree of precision, a high degree of cleanliness and a special manufacturing technique.
Due to the above-mentioned reason, a product having high reliability and a high degree of completion may be manufactured in a state in which the semiconductor device is completely prevented from contacting foreign substances contained in the air, i.e., a vacuum state.
Meanwhile, a vacuum pump suctioning the air and other gases in a process chamber is installed outside the process chamber to maintain the vacuum state in the process chamber for manufacturing the semiconductor device.
Also, as a vacuum valve is installed between the process chamber and the vacuum pump, and the vacuum valve is opened to discharge the air and other gasses in the process chamber and closed to maintain the vacuum state in the process chamber, the process chamber may always maintain a clean vacuum state therein.
A gate valve disclosed in the below patent document 1 (Korean Registered Patent No. 10-0338164) includes: a valve box; a valve disc disposed in the valve box to face and contact a valve sheet disposed in the valve box; a valve rod sealingly protruding to perform vertical movement and inclined movement by interposing a bellows between the inside and the outside of the valve box connected to the valve disc; and a movable unit disposed outside the valve box and allowing the valve disc to move between positions facing or not facing the valve sheet by interposing the valve rod and allowing the valve rod to perform the inclined movement so that the valve disc presses the valve sheet after the valve disc is disposed on the position spaced from and facing the valve sheet. Here, the movable unit includes: a roller disposed on each of one side and the other side of each of a piston cylinder device, a piston rod of the piston cylinder device, and the valve rod to connect each other; a spring restraining to allow a lengthy inclined hole coupled to the roller, the piston rod, and the valve rod to be spaced apart from each other in a shaft direction; and a guide provided on a cylinder of the piston cylinder device to guide the vertical movement and the inclined movement of the valve rod. When the piston rod is pressed by the piston cylinder device so that the piston rod approaches the valve rod, the valve rod is inclined by interposing the roller and the lengthy inclined hole, and the valve disc presses the valve sheet. In addition, since all mechanical components for pressing the valve disc with respect to the valve sheet are not disposed in the valve box, impurities generated by wear between components is not generated in the valve box.
However, when the valve rod vertically moves so that the valve disc is spaced apart from the valve sheet to open the valve from a state in which the valve disc presses the valve sheet to close the valve, since a front portion of the valve disc is being exposed to an inner space of the valve sheet, the air and the other gases contact an O-ring made of an elastic material and provided on the front portion of the valve disc while the air and the other gases moves inside the valve sheet, and thus the O-ring is corroded and rapidly deformed to shorten a replacement period of the O-ring.
The present invention is derived to resolve the above-described problems and it is an object of the present invention is to provide a vacuum valve capable of improving product performance of a packing ring to extend a replacement period of the packing ring. Here, as an opening and closing driving guide groove including a protruding groove section and first and second inclined groove sections is defined in each of both side surfaces of a driving block, and an L-motion roller inserted into and moving along the opening and closing driving guide groove is provided on an L-motion block, when the L-motion roller is disposed at an end of the first inclined groove section, one side surface of a valve blade closes an inlet, and when the L-motion roller is disposed at an end of the second inclined groove section, one side surface of the valve blade closely contacts an inner surface of the housing. Accordingly, the packing ring provided on a closing surface of the valve blade is fundamentally blocked from contacting air or fluid, and thus the product performance of the packing ring is improved to extend the replacement period of the packing ring.
An embodiment of the inventive concept provides a vacuum valve 1 including: a valve housing 100 including a fluid flow hole (101) defined therein and on which an inlet 110 through which fluid is introduced and an outlet 120 through which fluid is discharged are provided; a valve blade 200 disposed in the valve housing 100 to open and close the inlet 110; a valve rod 300 connected to the valve blade 200 and including a connecting projection 310 protruding from an upper portion thereof; an L-motion block 400 connected to the connecting projection 310 and including stroke rollers 410 respectively provided on both lower side surfaces thereof and L-motion rollers 420 respectively provided on both upper side surfaces thereof; a driving block 500 connected to the L-motion block 400 and including opening and closing driving guide grooves 510 respectively defined in both side surfaces thereof so that the L-motion rollers 420 are respectively inserted therein to vertically move; a spring pin 600 provided on one surface of the driving block 500; an elastic member 700 provided between the spring pin 600 and each of the L-motion rollers 420; a guide housing 800 coupled to an upper portion of the valve housing 100 and including stroke roller rail grooves 810 recessed so that the stroke rollers 410 are respectively inserted therein and defined in both inner side surfaces thereof; a cylinder 900 detachably coupled to an upper portion of the guide housing 800; a piston 910 protruding to be connected to the driving block 500 while maintaining a sealing between the inside and the outside of the cylinder 900 and vertically moving by hydraulic pressure.
In an embodiment, each of the stroke rollers 410 is more biased to a closing direction C than the L-motion roller 420.
In an embodiment, when each of the opening and closing driving guide grooves 510 has a protruding groove section 511 protruding to the closing direction C, and the L-motion roller 420 is disposed in the protruding groove section 511, the valve blade 200 is inclined to an opening direction O with respect to the stroke roller 410.
In an embodiment, when a first inclined groove section 512 inclined to the opening direction O as upward from the protruding groove section 511 is provided, and the L-motion roller 420 is disposed at an end 512a of the first inclined groove section 512, the valve blade 200 moves to the closing direction C with respect to the stroke roller 410 to close the inlet 110.
In an embodiment, when a second inclined groove section 513 inclined to the opening direction O as downward from the protruding groove section 511 is provided, and the L-motion roller 420 is disposed at an end 513a of the second inclined groove section 513, the valve blade 200 moves to the closing direction C with respect to the stroke roller 410 to closely contact an inner surface (102) of the housing (100).
According to the present invention, the present invention is derived to resolve the above-described problems and it is an object of the present invention is to provide the vacuum valve, Here, as the opening and closing driving guide groove including the protruding groove section and the first and second inclined groove sections is defined in each of the both side surfaces of the driving block, and the L-motion roller inserted into and moving along the opening and closing driving guide groove is provided on the L-motion block, when the L-motion roller is disposed at the end of the first inclined groove section, one side surface of the valve blade closes the inlet, and when the L-motion roller is disposed at the end of the second inclined groove section, one side surface of the valve blade closely contacts the inner surface of the housing. Accordingly, the packing ring provided on a closing surface of the valve blade is fundamentally blocked from contacting air or fluid, and thus the product performance of the packing ring is improved to extend the replacement period of the packing ring.
Hereinafter, a vacuum valve 1 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. It is also noted that like reference numerals denote like elements or like components throughout the drawings. Moreover, detailed descriptions related to well-known functions or configurations will be ruled out in order not to unnecessarily obscure subject matters of the present invention.
As illustrated in
Before describing the present invention, as illustrated in
Also, as illustrated in
First, the valve housing 100 will be described. As illustrated in
Next, the valve blade 200 will be described. As illustrated in
According to the present invention, as the valve blade 200 is configured such that the closing surface 201 of the valve blade 200 closely contacts an inner surface 102 of the valve housing 100 while the inlet 110 is opened, a packing ring 210 provided on the closing surface 201 may not be exposed on the fluid flow hole 101 to increase tightness of sealing, thereby fundamentally blocking the packing ring 210 from contacting air and fluid.
Next, the valve rod 300 will be described. As illustrated in
Meanwhile, as illustrated in
Also, as the bellows 320 serves to separate the valve rod 300 from the guide housing 800 that will be described later, when the inlet 110 is opened, air and fluid are blocked from being introduced into the guide housing 800 through the inlet 110.
Next, the L-motion block 400 will be described. As illustrated in
The stroke roller 410 is rotatably installed on both lower side surfaces of the L-motion block 400 and guides the vertical movement of the L-motion block 400 during an operation process of the present invention.
Meanwhile, according to the present invention, the stroke roller 410 is more biased to the closing direction C than the L-motion roller 420. As illustrated in
Also, when the L-motion block 400 horizontally moves according to a position of the L-motion roller 420 moving by seating on the opening and closing driving guide groove 510, the stroke roller 410 may serve as a central shaft preventing a lower portion of the L-motion block 400 from horizontally moving by a stroke roller rail groove 810 of the guide housing 800, which will be described later and into which the stroke roller 410 is inserted, and allow only an upper portion of the L-motion block 400 to horizontally move.
The L-motion roller 420 is rotatably installed on both upper side surfaces of the L-motion block 400. The L-motion roller 420 is seated on the opening and closing driving guide groove 510 and allows the valve rod 300 to move in the closing direction C or the opening direction O according to a position of the vertical movement thereof.
Next, the driving block 500 will be described. As illustrated in
As illustrated in
As illustrated in
As illustrated in
As illustrated in
Meanwhile, according to the present invention, the guide roller 520 is rotatably installed on each of both upper side surfaces of the driving block 500. For smooth operation, two or more guide rollers 520 are desirably provided so that the driving block 500 only vertically operates and does not horizontally move.
Also, as the guide roller 520 is provided on a position at which the guide roller 520 is not interfered by the opening and closing driving guide groove 510, the guide roller 520 may guide vertical movement of the driving block 500 during the operation process of the present invention.
Meanwhile, as illustrated in
According to the present invention, when the valve rod 200 vertically moves to open and close the inlet 110 in an operation process of the vacuum valve 1, the elastic member 700 serves to maintain a state in which the L-motion roller 420 is inserted into the protruding groove section 511 until the stroke roller 410 moves along the stroke roller rail groove 810 by the vertical movement of the piston 910 and reached to a lower end 810a or an upper end 810b of the stroke roller rail groove to complete the vertical movement of the L-motion block 400.
Also, as illustrated in
Next, the guide housing 800 will be described. As illustrated in
Next, the cylinder 900 will be described. As illustrated in
Since a principle of configuring and operating the cylinder 900 is well known to those skilled in the art, detailed description regarding this will be omitted.
Hereinafter, referring to
Referring to
First, as illustrated in
In this case, the stroke roller 410 is disposed on the lower end 810a of the stroke roller rail groove 810, the L-motion roller L-motion roller 420 is disposed on the end 512a of the first inclined groove section 512, and the elastic member 700 connected between the L-motion roller 420 and the spring pin 600 maintains a downward tensile state.
Also, the bellows 320 is compressed because the descending of the piston 910 is completed.
In the above-described state, as tensile force of the elastic member 700 is released when the piston 910 ascends, the driving block 500 ascends to move the L-motion roller 420 from the end 512a of the first inclined groove section 512 to the protruding groove section 511.
As illustrated in
In the above-described state, as illustrated in
As the valve rod 300 ascends, the valve blade 200 is deviated from a horizontal path of the inlet 110 and the outlet 120 and disposed on an upper portion of the fluid flow hole 101, and thus the inlet 110 is completely opened.
Meanwhile, when the piston 910 continues to ascend, the stroke roller 410 is disposed on the upper end 810a of the stroke rail groove 810. When the piston 910 continues to ascend in a state in which the stroke roller 410 is disposed on the upper end 810a of the stroke rail groove 810, the driving block 500 ascends to move the L-motion roller 420 from the protruding groove section 511 to the second inclined groove section 513. The elastic member 700 connected between the L-motion roller 420 and the spring pin 600 maintains an upward tensile state due to the ascending of the driving block 500.
As illustrated in
Due to the above-described state, as sealing of the packing ring 210 provided on the closing surface 201 of the valve blade 200 is maintained, the packing ring 210 may be fundamentally prevented from contacting the air and the fluid to improve product performance of the packing ring 210 and extend a replacement period of the packing ring 210.
Meanwhile, as illustrated in
Meanwhile, as illustrated in
Due to this, when a purified gas is injected in a state in which the closing surface 201 of the valve blade 200 closely contacts the inner surface 102 of the valve housing 100, as the purified gas removes process by-products existing on the closing surface 201 of the valve blade 200 while passing therethrough, the valve blade 200 and the packing ring 210 may extend in product lifecycle.
Optimized embodiments are disclosed in the drawings and the specification. While specific terms were used, they were not used to limit the meaning or the scope of the present invention described in claims, but merely used to explain the present invention. Accordingly, a person having ordinary skill in the art will understand from the above that various modifications and other equivalent embodiments are also possible. Hence, the real protective scope of the present invention shall be determined by the technical scope of the accompanying claims.
Number | Date | Country | Kind |
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10-2014-0165234 | Nov 2014 | KR | national |
Filing Document | Filing Date | Country | Kind |
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PCT/KR2015/009695 | 9/16/2015 | WO | 00 |