JP4817242B2 - Valve device - Google Patents

Description

  The present invention relates to a valve device suitable for a piping system for conveying a conveyed product.

  Conventionally, ball valves and gate valves have been used as valve devices arranged in equipment piping that conveys granular materials, cutting powder, and the like by air suction force. In particular, the gate valve has an advantage that the configuration can be simplified because the opening is closed by sliding the valve body relative to the housing having the opening.

  In addition, with this type of gate valve, there is a risk that powder particles and cutting powder may enter the sliding surfaces that are both side surfaces of the valve body as the valve body slides. Furthermore, the sliding action of the valve body is hindered by the penetration of the powder or cutting powder into the sliding surface of the valve body, or a gap is formed by the powder and cutting powder entering the sliding surface. There is a risk that.

Therefore, as a configuration for preventing the particles and cutting powder from entering the sliding surface, a purge gas is supplied to the housing, and the pressure of the housing is made higher than the pressure of the flow path in the opening, thereby allowing the valve body to There has been known a valve having a purge mechanism that discharges a granular material or cutting powder that has entered between the housing and the housing into the opening (see, for example, Patent Document 1).
JP 2003-90459 A (Page 3, FIG. 1)

  However, since the purge gas is supplied directly into the opening of the housing in the valve having the purge mechanism described above, a large amount of purge gas is required. Therefore, the valve itself is expensive and the valve housing and the valve body are separated from each other. Movement of opening and closing the opening of the valve body housing due to the powder or cutting powder entering between the housing and the valve body. Has a problem that there is a possibility of becoming a malfunction.

  This invention is made in view of such a point, and it aims at providing the valve apparatus which can prevent the movement defect of a valve body.

The invention according to claim 1 is a housing having an opening through which a conveyed product passes, a valve body that is slidably provided with respect to the housing and has an opening through which the conveyed product passes, and opens and closes the opening of the housing; ; and a groove for receiving a supply of around each provided pressurized gas of each opening in the sliding surface of the housing and the valve body, the groove of the housing, opposite to the opening of the out valve body opening of the housing The groove part of the valve body is formed in an arc shape along the opening edge located on the opposite side of the opening part of the housing from the opening part of the housing. With the curved groove, the opening of the housing and the opening of the valve body being separated from each other, the valve body linearly extends in the sliding direction of the valve body from both ends of the curved groove to both ends of the housing groove. and a pair of linear grooves provided It is a device.

請 Motomeko 2 the described invention, the groove in the valve device according to claim 1 Symbol mounting is provided on both the sliding surfaces of the sliding surface and the valve body side of the housing side, the openings of at least the housing and the valve body When the two overlap, both groove portions are communicated to surround the entire circumference of each opening.

According to a third aspect of the present invention, the housing in the valve device according to the first or second aspect includes an air supply hole for supplying pressurized gas to the linear groove.

According to the first aspect of the present invention, the pressurized gas is supplied to the grooves provided around the openings on the sliding surfaces of the housing and the valve body, so that the sliding facing the openings of the housing and the valve body is achieved. It is possible to prevent or eliminate the biting of the conveyed product on the moving surface and to prevent the valve body from moving poorly. In particular, a pressurized fluid is formed around each opening of the housing and the valve body by the groove portion formed in the arc shape of the housing, the curved groove portion formed in the arc shape of the valve body and the pair of linear groove portions. Can be reliably supplied, and the biting of the conveyed product into the sliding surface of the housing and the valve body can be reliably prevented and eliminated.

According to the invention 請 Motomeko 2, wherein the groove of the housing side and the valve body side communicating to surround the entire periphery of each opening when each opening of the housing and the valve body overlap at least, all of the openings By supplying pressurized gas to the circumference, it is possible to reliably prevent and eliminate the biting of the conveyed product.

According to invention of Claim 3 , a pressurized fluid can be easily supplied to a linear groove part from the outside through the air supply hole of a housing.

  Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS.

  As shown in FIGS. 1 and 2, the valve device 7 includes a housing 9 configured by a pair of holding plates 9 a and 9 b that are rectangular flat plate-like bodies arranged in parallel and spaced apart from each other. Yes. Each holding plate 9a, 9b of the housing 9 is formed in an elongated rectangular flat plate shape when viewed from the side as shown in FIGS. 1 to 3, and is installed in a state where the longitudinal direction is along the vertical direction. Furthermore, the holding plates 9a and 9b are formed in a symmetrical shape with respect to the up-down direction in which the left-right direction as the width direction is the longitudinal direction.

  In addition, the holding plates 9a and 9b are formed with an opening 11 which is a circular-shaped flow path hole penetrating in the thickness direction at the center in the longitudinal direction of the holding plates 9a and 9b. The opening 11 is opened in a circular shape having an inner diameter dimension that is approximately one-half of the width dimension of the holding plates 9a and 9b, so that a conveyed product such as chips passes through the opening 11. It is configured. The holding plates 9a and 9b are installed in a concentric state so that the inner peripheral surfaces of the openings 11 of the holding plates 9a and 9b are flush with each other.

  Furthermore, a plurality of, for example, three attachment holes 12 are formed outside the openings 11 of the holding plates 9a and 9b. These mounting holes 12 penetrate along the thickness direction of the holding plates 9a and 9b, and both sides below the opening 11 of the holding plates 9a and 9b and one side above the opening 11 Are provided in each part. Accordingly, these mounting holes 12 are provided along the vertical direction at one side of the holding plates 9a, 9b in the width direction. Further, these mounting holes 12 are provided along the width direction of the holding plates 9a, 9b at a position above the opening 11 of the holding plates 9a, 9b.

  Then, above the opening 11 of the holding plates 9a, 9b and on the other side in the width direction of the holding plates 9a, 9b from the opening 11 along the thickness direction of the holding plates 9a, 9b. A penetrating air supply hole 13 is provided. The air supply hole 13 has an inner diameter larger than the inner diameter of the mounting hole 12. In other words, the air supply holes 13 are openings for supplying air as pressurized gas under pressure between the pair of holding plates 9a and 9b. Further, the air supply holes 13 and the attachment holes 12 are spaced apart at equal intervals along the circumferential direction of the openings 11 at positions outside the openings 11 of the holding plates 9a and 9b.

  Further, on the sliding surface 14 which is the inner surface located on the opposite sides of the pair of holding plates 9a, 9b, curved groove portions 15 formed in an arc shape along the opening edge of the opening portion 11 are respectively provided. Is provided. The curved groove 15 is provided below the opening 11 and between the opening 11 and the attachment hole 12 in a circular arc shape concentric with the opening 11. The curved groove portion 15 is provided over substantially half of the lower end side of the opening portion 11 of each holding plate 9a, 9b.

  Further, the curved groove portion 15 is formed in an arc shape along the inner diameter dimension of the opening portion 11. That is, the curved groove portion 15 has a width dimension equal to the width dimension between the centers of the pair of mounting holes 12 provided along the width direction of the holding plates 9a and 9b, and the pair of mounting holes This is a semicircular arc-shaped groove portion having a radial dimension substantially equal to the length dimension from the imaginary straight line connecting the centers of 12 to the center of the opening 11.

  Further, a plurality of, for example, five connecting holes 16 are formed on both side portions of the pair of holding plates 9a, 9b in the width direction outside the mounting holes 12 and the openings 11, respectively. These connecting holes 16 penetrate along the thickness direction of the holding plates 9a, 9b, and are arranged in parallel in a state of being spaced apart at equal intervals along the longitudinal direction of the holding plates 9a, 9b. Further, a guide block 18 as an elongated rectangular flat plate-like side wall portion having an insertion hole 17 communicating with the connection hole 16 of the pair of holding plates 9a, 9b is attached to the pair of holding plates 9a, 9b.

  The guide block 18 has a pair of holding plates 9a, 9b facing each other in parallel with each other and the openings 11 of the pair of holding plates 9a, 9b communicated concentrically. By inserting the insertion holes 17 into the connecting holes 16 of the holding plates 9a and 9b, and inserting the socket bolts 19 through the insertion holes 17 and fastening them into the connecting holes 16, the pair of holding plates 9a and 9b Attached in between. Accordingly, both side portions of the holding plates 9a and 9b in the width direction are closed by the guide blocks 18, respectively.

  In addition, a pair of bolt holes 21 are formed in both longitudinal end surfaces of the pair of holding plates 9a, 9b, respectively, and a rectangular flat plate shape is formed between the both end surfaces of the pair of holding plates 9a, 9b. A base plate 22 is attached as a plate-like body. These base plates 22 are fixed between the both ends of the holding plates 9a and 9b by fixing the socket bolts 19 to the bolt holes 21 of the holding plates 9a and 9b through screw holes 23 formed in the base plates 22. It is fixed to. Therefore, each of the holding plates 9a, 9b is closed by the base plate 22 between both ends in the longitudinal direction.

  Between the holding plates 9a and 9b of the housing 9, as shown in FIGS. 1, 2 and 4, a flat valve body 24 for opening and closing the opening 11 of the holding plates 9a and 9b is provided with the holding plates 9a and 9b. It is slidably attached to 9b. The valve body 24 is an opening / closing means as a substantially rectangular flat valve body having a width dimension substantially equal to the width dimension between the guide blocks 18 attached between the pair of holding plates 9a, 9b. Further, the valve body 24 has a thickness dimension substantially equal to the thickness dimension of the guide block 18, and a distance between the base plates 22 attached to both ends in the longitudinal direction of the pair of holding plates 9a and 9b. Has a smaller longitudinal dimension than the dimension.

  Further, the valve body 24 is formed with a circular opening 25 through which a conveyed product passes. The opening 25 is a gate opening equal to the inner diameter of the opening 11 of the holding plates 9a and 9b, and penetrates along the thickness direction of the valve body 24. It is provided on the upper side.

  That is, the opening 25 communicates with the respective openings 11 of the holding plates 9a and 9b in a state where the valve body 24 is moved downward between the holding plates 9a and 9b, and the valve body 24 is connected to the holding plate 9a. , 9b, the opening 11 of each of the holding plates 9a, 9b is provided at a position where it can be closed at a portion below the opening 25 of the valve body 24.

  Further, the sliding surfaces 26 on both sides of the valve body 24 are formed in the curved groove portions 15 of the holding plates 9a and 9b in a state where the valve body 24 is accommodated between the pair of holding plates 9a and 9b. The valve body side groove portions 27 communicated with each other are provided. These groove portions 27 are valves that are slidably contacted against the sliding surfaces 14 of the pair of holding plates 9a, 9b in a state where the valve body 24 is accommodated between the pair of holding plates 9a, 9b. Each of the sliding surfaces 26 of the body 24 is provided.

  Furthermore, these groove portions 27 are formed in an arc shape along the opening edge of the opening portion 25 at a position above the opening portion 25 of the valve body 24 that is the side facing the curved groove portion 15 of the holding plates 9a and 9b. A curved groove portion 28 is formed. The curved groove 28 is a semicircular groove having a shape similar to that of the curved groove 15 of the holding plates 9a and 9b. Then, upper end portions, which are one end portions in the longitudinal direction of the pair of linear groove portions 29, are integrally connected to both ends of the curved groove portion 28 along the sliding direction of the valve body 24. .

These linear grooves 29 are provided on both sides in the width direction of the valve body 24 in a state where the longitudinal directions thereof are parallel to each other along the sliding direction of the valve body 24, and between these linear grooves 29 Is formed to be equal to the width of the curved groove 28. Further, these linear grooves 29 has a lower end portion in the longitudinal direction of the other end portion of the linear groove portions 29, a pair of holding plates 9a and the valve body 24, while being moved up laterally across 9b The holding plates 9a and 9b are continuously provided in a straight line extending to positions communicating with both ends of the curved groove portion 15 of each of the holding plates 9a and 9b.

  Further, on the upper end side of the one linear groove portion 29, a linear extension groove portion 31 that protrudes upward along the longitudinal direction of the one linear groove portion 29 is continuously formed. . The linear extension groove 31 is a part of one of the linear grooves 29, and the upper end, which is one end in the longitudinal direction of the linear extension groove 31, serves as a pair of holding plates. In a state of being moved downward between 9a and 9b, the holding plates 9a and 9b are continuously provided in a straight line up to a position communicating with the air supply holes 13 of the holding plates 9a and 9b.

  Therefore, the groove portion 27 of the valve body 24 is a linear shape of the groove portion 27 in the air supply hole 13 of the holding plates 9a and 9b in a state where the valve body 24 is moved downward between the pair of holding plates 9a and 9b. The upper end portion of the extended groove portion 31 communicates, and the linear groove portion 29 of the groove portion 27 communicates with both end portions of the curved groove portion 15 of the holding plates 9a and 9b, so that the groove portion 27 and the curved groove portion 15 are connected. As a result, each of the opening 11 of the holding plates 9a and 9b and the opening 25 of the valve body 24 is covered in the circumferential direction.

  Further, the groove portion 27 of the valve body 24 is a linear shape of the groove portion 27 in the air supply hole 13 of the holding plates 9a and 9b in a state where the valve body 24 is moved upward between the pair of holding plates 9a and 9b. The central portion in the longitudinal direction of the groove portion 29 communicates, and the lower end of the linear groove portion 29 of the groove portion 27 communicates with both end portions of the curved groove portion 15 of the holding plates 9a and 9b. Each of the opening 11 of the holding plates 9a and 9b and the opening 25 of the valve body 24 is covered by the groove 15 in the circumferential direction. Therefore, the linear groove portions 29 of the groove portions 27 are formed by connecting the opening portions 25 of the valve body 24 to the opening portions 11 from the position where the valve body 24 closes the opening portions 11 of the holding plates 9a and 9b. It has a length dimension enough to communicate with each other through the groove portion 27 up to the opening position.

  Further, a locking member 33 having a locking recess 32 that is concave in a side view is attached to the upper end surface that is one end surface in the longitudinal direction of the valve body 24. The locking recess 32 of the locking member 33 is open upward and is located at the center of the locking member 33 in the width direction. Furthermore, the locking member 33 is connected to the upper end surface of the valve body 24 by a simple joint 34 as a connecting means on both sides of the locking member 33.

  On the other hand, on the base plate 22 on the upper side of the housing 9, a valve opening / closing cylinder 35 as an elevating means as a driving means is attached. The valve opening / closing cylinder 35 includes an elevating unit 36 that is moved up and down by the valve opening / closing cylinder 35. The lifting / lowering portion 36 of the valve opening / closing cylinder 35 includes a locking member 33 that is attached to the upper end portion of the valve body 24 that passes through the upper base plate 22 and is accommodated between the pair of holding plates 61a and 61b. It is locked and connected to the locking recess 32. Therefore, the valve opening / closing cylinder 35 moves the valve body 24 up and down and slides between the pair of holding plates 9a and 9b by vertically moving, that is, raising and lowering the lifting / lowering portion 36 of the valve opening / closing cylinder 35. .

  Further, a through-hole 37 penetrating along the thickness direction of the base plate 22 is formed in the center of each of the longitudinal direction and the width direction of the base plate 22 on the lower side of the housing 9. An alignment adjusting mechanism 38 is attached to the through hole 37 as the valve body 24 lowering position adjusting means. The alignment adjustment mechanism 38 includes a set screw 39 as a hole alignment adjustment screw that is inserted into the through hole 37 of the base plate 22 so as to be able to advance and retract. A nut 41 is rotatably engaged with the set screw 39 from the lower surface side of the base plate 22. By adjusting the locking position of the valve body 24 by the alignment adjusting mechanism 38, the opening 25 of the valve body 24 and the opening 11 of each of the pair of holding plates 9a and 9b are adjusted to coincide with each other.

  Further, as shown in FIG. 2, a flange 42, which is a connecting portion as an extending portion for extending these opening portions 11, is connected to and attached to the opening portions 11 of the pair of holding plates 9a and 9b. It has been. A pipe 43 is integrally provided on the flange 42, and the pipe 43 is screwed with a bolt 45 through the mounting holes 12 of the holding plates 9a and 9b in a state where the pipe 43 communicates with the openings 11 of the holding plates 9a and 9b. Stopped and fixed.

  The air supply holes 13 of these holding plates 9a and 9b serve as purge gas to the curved groove portions 15 and the groove portions 27 communicated between the holding plates 9a and 9b and the valve body 24 through the air supply holes 13. A distal end portion of an air supply pipe 47 of an air purge mechanism 46 that supplies pressurized air is connected in communication via a speed controller 48.

  These air purge mechanisms 46 are supplied by injecting air from the air supply holes 13 between the curved groove portions 15 of the pair of holding plates 9a and 9b and the groove portions 27 of the valve body 24, thereby injecting them. The sliding surface 14 of the pair of holding plates 9a and 9b and the sliding surface 26 of the valve body 24 are floated to facilitate the movement of the valve body 24 and the sliding of the pair of holding plates 9a and 9b. The transported material that has entered between the moving surface 14 and the sliding surface 26 of the valve body 24 is smoothly pushed out without being swirled and discharged into the opening 11 of the holding plates 9a and 9b or the opening 25 of the valve body 24. .

  In other words, the air purge mechanism 46 introduces pressurized air between the sliding surface 14 of the holding plates 9a and 9b of the valve device 7 and the sliding surface 26 of the valve body 24, thereby causing the sliding surfaces 14 to move. , 26 is made higher than the air pressure in the opening 11 of the holding plates 9a, 9b and the opening 25 of the valve body 24, so that the object passing through the opening 11 and the opening 25 is held. Intrusion between the sliding surface 14 of the plates 9a and 9b and the sliding surface 26 of the valve body 24 is prevented.

  At the same time, the air purge mechanism 46 floats the gap between the sliding surface 14 of the holding plates 9a, 9b and the sliding surface 26 of the valve body 24, and also the sliding surface 14 of the holding plates 9a, 9b and the valve The conveyed product that has entered between the sliding surface 26 of the body 24 is pushed out into the opening 11 of the holding plates 9a, 9b or the opening 25 of the valve body 24, and then discharged, and the holding plates 9a, 9b are discharged. The sliding of the valve body 24 accommodated therebetween is made smooth.

  Next, the function and effect of the embodiment will be described.

In the initial state of the valve device 7, the valve body 24 of the valve device 7 is moved upward by driving the valve opening / closing cylinder 35, and the pipe 43 is formed at a portion below the opening 25 of the valve body 24. is closed, the groove 27 of the straight groove portion 29 between the holding plate 9a of the valve body 24 of this is communicated to both ends of 9b curved grooves 15, the holding plate in these grooves 27 and curved grooves 15 Each of the opening 11 of 9a and 9b and the opening 25 of the valve body 24 is covered in the circumferential direction.

  At this time, a curved groove portion 15 of the holding plates 9a and 9b and a groove portion 27 of the valve body 24 are formed from the air pressure source through the air supply holes 13 of the pair of holding plates 9a and 9b of the housing 9. Compressed air is injected into the annular groove, and this air causes a gap between the sliding surface 14 of the holding plates 9a, 9b and the sliding surface 26 of the valve body 24 to float, and the sliding surfaces 14, 26 Conveyed materials such as chips that have entered the gaps between the openings 11 of the holding plates 9a and 9b and the openings 25 of the valve body 24 are pushed inward and discharged, and these holding plates are discharged. It is discharged into the opening 11 of 9a, 9b or the opening 25 of the valve body 24.

On the other hand, when the valve body 24 of the valve device 7 is moved downward by the drive of the valve opening / closing cylinder 35 to be opened, the holding plates 9a, 9b and the valve body 24 by the air purge mechanism 46 of the valve device 7 are in a state where the injection of air into between is continued, the valve element 24 of this is moved downward by the driving by the valve opening and closing cylinder 35.

At this time, while the valve body 24 is driven downward, the groove portion 27 of the valve body 24 and the curved groove portion 15 of the holding plates 9a and 9b communicate with each other, and the groove portion 27 and the curved groove portion are communicated. 15 and the opening 11 of the holding plates 9a, 9b and the opening 25 of the valve body 24 are covered in the circumferential direction, so that the holding plates 9a, 9b and the valve body 24 by the air purge mechanism 46 By injecting air between them, the gap between the sliding surface 14 of the holding plates 9a, 9b and the sliding surface 26 of the valve body 24 is lifted and enters between the sliding surfaces 14, 26. The valve body 24 is moved downward while the conveyed product is pushed inward and discharged over the circumferential directions of the opening 11 of the holding plates 9a and 9b and the opening 25 of the valve body 24, respectively. In a state where the valve body 24 is moved downward between the pair of holding plates 9a and 9b, the upper end portion which is one end portion in the longitudinal direction of the linear extension groove portion 31 is in the air supply hole 13 of the holding plates 9a and 9b. Communicate.

  Thereafter, it is determined whether there is an input of an opening signal for opening the valve device 7. If there is no input of an opening signal for the valve device 7, the air purge mechanism 46 of the valve device 7 is operated and the valve device 7 is operated. The body 24 is moved upward by the valve opening / closing cylinder 35 and closed.

  As described above, the valve body 24 of the valve device 7 is moved downward between the pair of holding plates 9a, 9b, that is, the opening 25 of the valve body 24 communicates with the opening 11 of the holding plates 9a, 9b. Thus, in the opened state of the valve device 7 with the opening 11 fully opened, the upper end portion of the extension groove portion 31 of the groove portion 27 of the valve body 24 communicates with the air supply holes 13 of the holding plates 9a and 9b. Become. At the same time, the linear groove portions 29 of the groove portion 27 of the valve body 24 are in communication with both end portions of the curved groove portions 15 of the holding plates 9a and 9b. Therefore, each of the opening 27 of the holding plates 9a and 9b and the opening 25 of the valve body 24 is covered and surrounded in an annular shape by the groove 27 and the curved groove 15 in the circumferential direction. ing.

When the valve body 24 of the valve device 7 is moved upward between the pair of holding plates 9a and 9b from the opened state of the valve device 7, the linear groove portion 29 of the groove portion 27 of the valve body 24 is obtained. , The air supply holes 13 of the holding plates 9a, 9b move relatively downward . Accordingly, the valve body 24 moves upward while maintaining the state in which the air supply holes 13 of the holding plates 9a and 9b communicate with the linear groove portion 29 of the groove portion 27 of the valve body 24. Further, both end portions of the curved groove portion 15 of the holding plates 9a and 9b move relatively downward along the linear groove portion 29 of the groove portion 27 of the valve body 24. Therefore, the valve body 24 moves upward while maintaining a state where the straight groove portions 29 of the groove portion 27 of the valve body 24 communicate with both ends of the curved groove portions 15 of the holding plates 9a and 9b.

  Further, the valve body 24 of the valve device 7 is moved upward between the pair of holding plates 9a and 9b from the opened state of the valve device 7, that is, the opening 11 of the holding plates 9a and 9b is moved to the valve body 24. In the closed state of the valve device 7 closed by the sliding surface 26 below the opening 25 and closing the opening 11, the central portion in the longitudinal direction of the linear groove 29 of the groove 27 of the valve body 24 However, it will be in the state connected to the air supply hole 13 of each holding | maintenance plate 9a, 9b.

  Therefore, regardless of the movement position of the valve body 24, the state in which the air supply holes 13 of the holding plates 9a and 9b communicate with the linear groove portion 29 of the groove portion 27 of the valve body 24 can be maintained. The communication state between the groove 27 and the air supply hole 13 can be maintained without using the. Therefore, the communication structure between the groove 27 and the air supply hole 13 can be simplified.

  At the same time, the lower end of the linear groove portion 29 of the groove portion 27 of the valve body 24 is in communication with both ends of the curved groove portion 15 of the holding plates 9a and 9b. Therefore, each of the opening 27 of the holding plates 9a and 9b and the opening 25 of the valve body 24 is covered and surrounded in an annular shape in the circumferential direction by the groove 27 and the curved groove 15. .

  As a result, the curved groove portion 15 of the holding plates 9a, 9b, the upper portion of the linear groove portion 29 of the groove portion 27 of the valve body 24 communicated by the curved groove portion 15, and the curved groove portion 28, Thus, while maintaining the state in which each of the opening 11 of the holding plates 9a and 9b and the opening 25 of the valve body 24 is annularly surrounded in the circumferential direction, the valve body 24 is paired with the pair of holding plates 9a and 9b. It is moved up and down between.

  Therefore, regardless of the position of movement of the valve body 24 accommodated between the pair of holding plates 9a, 9b, the holding plates 9a, 9b of the valve device 7 are connected to each other through the air supply pipe 47 from the air purge mechanism 46. By pressurizing and supplying air to the air supply holes 13, the compressed air is supplied and injected between the curved groove portion 15 of the pair of holding plates 9a and 9b and the groove portion 27 of the valve body 24. The

  For this reason, the pressurized air injected into the curved groove portions 15 and the groove portions 27 communicating in an annular shape is directed toward the opening portions 11 of the holding plates 9a and 9b and the opening portion 25 of the valve body 24, respectively. It is diffused substantially uniformly over the entire circumferential direction of the opening 11 and the opening 25, that is, over the entire circumference, and pressure is applied between the sliding surface 14 of the holding plates 9a and 9b and the sliding surface 26 of the valve body 24. Air enters almost uniformly.

  Therefore, when this pressurized air enters substantially uniformly between the sliding surface 14 of the holding plates 9a and 9b and the sliding surface 26 of the valve body 24, a gap between the sliding surfaces 14 and 26 is formed. The holding plates 9a, 9b and the valve body 24 can be moved substantially in parallel to each other by the pressure of the pressurized air. The sliding surface 14 of the holding plates 9a, 9b and the sliding surface 26 of the valve body 24 Can be made to float substantially in parallel by the pressure of the pressurized air. Therefore, an air film is formed in the gap between the sliding surface 14 of the holding plates 9a and 9b and the sliding surface 26 of the valve body 24. Accordingly, the frictional force between the sliding surface 14 of the holding plates 9a and 9b and the sliding surface 26 of the valve body 24 that acts when the valve body 24 is slid between the pair of holding plates 9a and 9b. Therefore, the opening and closing movement of the valve body 24 can be made smoother.

  At the same time, due to the wind speed and pressure of the pressurized air that has entered between these sliding surfaces 14, 26, the conveyed product that has entered between these sliding surfaces 14, 26 is moved into the openings 11 and valves of the holding plates 9a, 9b. Since it can be smoothly pushed out to each of the openings 25 of the body 24 without substantially evenly stirring with pressurized air, the conveyed product can be pushed into the openings 11 of the holding plates 9a, 9b or the valve body 24. Can be efficiently discharged into the opening 25.

  Therefore, the sliding between the sliding surface 14 of the holding plates 9a and 9b and the sliding surface 26 of the valve body 24, and the conveyance object enters between the sliding surfaces 14 and 26. The transported object is caught between the sliding surfaces 14 and 26, and a large gap is formed between the sliding surfaces 14 and 26. Can be efficiently prevented. Therefore, it is possible to efficiently prevent the sliding of the valve body 24 between the holding plates 9a and 9b from occurring, and it is possible to efficiently prevent the valve operation from being hindered by the intrusion of the conveyed product of the valve device 7. For this reason, sliding of the valve body 24 accommodated between the holding plates 9a and 9b of the valve device 7 can be performed smoothly.

  Further, after the injection of pressurized air by the air purge mechanism 46 is started, the valve body 24 of the valve device 7 is slid by the valve opening / closing cylinder 35 in a state where the injection of the pressurized air by the air purge mechanism 46 is continued. By doing so, the force acting when moving the sliding surface 26 of the valve body 24 relative to the sliding surface 14 of the holding plates 9a, 9b, the sliding surface 26 of the valve body 24 and the holding plate 9a, The transported material that has entered between the sliding surfaces 14 and 26 is moved into the opening 11 of the holding plates 9a and 9b or the valve body by the pressure of the pressurized air that has entered between the sliding surfaces 14 of the 9b. Can be discharged into 24 openings 25.

  At this time, when the air purge mechanism 46 is operated several seconds before the opening and closing operation of the valve device 7 and the conveyed product in the pipe 43 is conveyed with the valve device 7 opened, the valve device 7 is closed. Therefore, the air purge mechanism 46 is not operated when the conveyance of the conveyed product in the pipe 43 is stopped. As a result, the air purge mechanism 46 efficiently discharges the conveyed material between the sliding surface 26 of the valve body 24 and the sliding surface 14 of the holding plates 9a and 9b, while reducing the operating time of the air purge mechanism 46. Therefore, the energy consumption required for driving the valve device 7 can be reduced.

  Further, by rotating the nut 41 of the alignment adjusting mechanism 38 attached to the base plate 22 on the lower side of the valve device 7, the screwing position of the nut 41 with respect to the set screw 39 is changed. Be advanced and retreated. The lowering position of the valve body 24, that is, the opening operation position can be adjusted by contact between the upper end portion of the set screw 39 and the lower end surface of the valve body 24 when the valve body 24 is moved downward. Therefore, the downward movement amount of the valve body 24 can be adjusted by adjusting the contact position between the upper end portion of the set screw 39 and the lower end portion of the valve body 24 of the alignment adjusting mechanism 38.

  Therefore, since the communication position between the opening 25 of the valve body 24 and the opening 11 of each of the pair of holding plates 9a and 9b can be adjusted, the inner peripheral surfaces of the opening 25 and the opening 11 are flush with each other. Thus, the moving position of the valve body 24 during the opening operation can be adjusted so as to communicate concentrically. Accordingly, the communication state between the opening 25 of the valve body 24 and the opening 11 of each of the pair of holding plates 9a and 9b during the opening operation of the valve device 7 can be adjusted. It is possible to more efficiently transport the conveyed product.

  Thus, according to the illustrated embodiment, the pressurized air is supplied to the grooves 15 and 27 provided around the openings 11 and 25 on the sliding surfaces of the housing 9 and the valve body 24. , Prevents or eliminates the transported material such as chips on the sliding surfaces facing the openings 11 and 25 of the housing 9 and the valve body 24, and prevents the movement of the valve body 24 due to the transported material it can.

  Pressurized fluid is reliably supplied around the openings 11 and 25 of the housing 9 and the valve body 24 by a combination of at least one of the linear and curved grooves 15 and 27 formed in the housing 9 and the valve body 24. In addition, it is possible to reliably prevent or eliminate the biting of the conveyed product into the sliding surfaces 14, 26 of the housing 9 and the valve body 24. In particular, a linear groove portion 29 formed in the sliding direction of the valve body 24 and curved groove portions 15 and 28 formed along the opening edges of the housing 9 and the opening portions 11 and 25 of the valve body 24 are provided. Since the openings 9 and 25 of the housing 9 and the valve body 24 are surrounded by communication with each other, the linear groove 29 and the valve body 24 can be opened and closed, and the valve body 24 can be slid. Pressurized air can be supplied around the openings 11 and 25 of the housing 9 and the valve body 24 by the combination of the curved grooves 15 and 28, and transported to the sliding surfaces 14 and 26 of the housing 9 and the valve body 24. It is possible to reliably prevent or eliminate the biting of objects.

  From the groove portions 15 and 27 on the housing side and the valve body side communicating so as to surround the entire circumference of each opening portion 11 and 25 when the opening portions 11 and 25 of the housing 9 and the valve body 24 at least overlap each other, By supplying pressurized gas to the entire circumference of 25, it is possible to reliably prevent and eliminate the biting of the conveyed product. In particular, curved groove portions 15 and 28 provided on both the sliding surface 14 on the housing 9 side and the sliding surface 26 on the valve body 24 side are provided with the opening portions 11 and 25 of the housing 9 and the valve body 24, respectively. When they overlap, they communicate in an annular shape along the entire circumference of each opening 11, 25, so that pressurized gas is evenly supplied to the entire circumference of these openings 11, 25 to prevent or eliminate the biting of the conveyed product. Can be realized most efficiently.

  The pressurized fluid can be easily supplied from the outside to the grooves 15 and 27 on the sliding surfaces 14 and 26 through the air supply holes 13 of the housing 9. In particular, since the housing 9 is provided with the air supply holes 13 for supplying pressurized gas onto the linear groove portion 29 and the extension groove portion 31 of the valve body 24, the housing 9 is independent of the sliding position of the valve body 24. The pressurized fluid can be supplied from the air supply holes 13 to the grooves 15 and 28 around the openings 11 and 25 through the linear grooves 29 and the extended grooves 31.

  As the pressurized gas, a purge gas such as an inert gas other than air, and other gases and fluids can be used correspondingly. In this case, the amount of purge gas used by the air purge mechanism 46 can be saved by setting the drive time of the air purge mechanism 46 only during the opening / closing operation of the valve device 7.

  Furthermore, although the air purge mechanism 46 is driven only when the valve device 7 is opened and closed, the air purge mechanism 46 can be continuously driven during the period from before the valve device 7 is opened to the closing operation. . In this case, with the opening 11 of the holding plates 9a and 9b of the valve device 7 and the opening 25 of the valve body 24 communicating with each other, the conveyed product is passed through the opening 11 and the opening 25 together with the intake air. Also when transporting, the injection of pressurized air by the air purge mechanism 46 is continued.

It is a front view showing one embodiment of a valve device concerning the present invention. It is sectional drawing of a valve apparatus same as the above. It is a front view which shows the housing of a valve apparatus same as the above. It is a front view which shows the valve body of a valve apparatus same as the above.

7 Valve device 9 Housing
11 opening
13 Air supply hole
15 Groove
24 Disc
25 opening
27 Groove
28 Groove
29 Groove

Claims (3)

A housing having an opening through which a conveyed product passes;
A valve body that is provided slidably with respect to the housing and has an opening through which a conveyed product passes, and that opens and closes the opening of the housing;
; And a groove for receiving a supply of around each provided pressurized gas of each opening in the sliding surface of the housing and the valve body,
The groove portion of the housing is formed in an arc shape along an opening edge located on the opposite side of the opening portion of the housing from the opening portion of the valve body,
The groove of the valve body includes a curved groove formed in an arc shape along an opening edge located on the opposite side of the opening of the housing from the opening of the valve body, and the opening of the housing and the valve body A pair of linear grooves provided linearly on the valve body in the sliding direction of the valve body from both ends of the curved groove section to both ends of the groove section of the housing in a state of being separated from each other Characteristic valve device. The groove is
Provided on both the sliding surface on the housing side and the sliding surface on the valve body side,
At least the housing and the claim 1 Symbol mounting of the valve device is both groove when each opening overlaps were characterized by surrounding the entire periphery of each opening communicates with the valve body. The housing is
The valve device according to claim 1 or 2 , further comprising an air supply hole for supplying pressurized gas to the linear groove portion.

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