JP2019035495A - Valve device and seat support member - Google Patents

Abstract

To improve the ability of removing foreign objects adhering to a surface of a valve body.SOLUTION: A valve device includes: a cylindrical valve box having an opening part communicating with a passage; a valve body which is disposed in the valve box and changes an opening of the opening part; a seat member which is provided around the opening part and adheres to the valve body when the opening is in a closed valve state; and a cylindrical seat support member which is at least partially inserted into the opening part of the valve box and supports the seat member along a circumferential direction by a tip part as seen in an insertion direction. At least one of the valve box and the seat support member has a supply port to which a second fluid is supplied from the outside. The seat support member has: a discharge port which is formed exposed to the valve body side in the tip part and discharges the second fluid; and a first discharge pipe which leads to the discharge port and is disposed along a direction intersecting with a direction parallel to an axial direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a valve device.

  Conventionally, as a valve device for switching between opening and closing of a fluid flow path, a valve box provided with an opening connected to the flow path, a valve body housed in the valve box to open and close the opening of the valve box, and around the opening The valve apparatus provided with the sheet | seat member arrange | positioned in is used. When the flow path is closed by the valve device, the valve body is pressed against the seat member to ensure adhesion. By the way, the fluid flowing through the flow path may include foreign matters such as powder and hard solids. In such a case, the presence of a foreign substance between the valve body and the seat member may damage the valve body or the seat member and reduce the adhesion. The valve device described in Patent Document 1 removes foreign matter adhering to the surface of the valve body by discharging a foreign matter removing fluid from a fluid discharge path that contacts the seat member.

Japanese Patent No. 5123245

  However, in the valve device described in Patent Document 1, foreign matter remains on the surface of the valve body, and the foreign matter removal performance is not sufficient. For this reason, the technique which improves the removal performance of the foreign material adhering to the surface of a valve body was calculated | required.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

(1) According to one form of this invention, a valve apparatus is provided. The valve device is a valve device disposed in the middle of a flow path of a first fluid; a cylindrical valve box having an opening communicating with the flow path; and disposed inside the valve box and A valve body for changing the opening of the opening; a seat member provided around the opening and in close contact with the valve body when the opening is in a closed state; A cylindrical seat support member that is partially inserted and supports the seat member along the circumferential direction by a distal end in the insertion direction; and at least one of the valve box and the seat support member, A supply port through which a second fluid is supplied from the outside; and the seat support member is formed to be exposed to the valve body at the tip, and discharges the second fluid; A first discharge pipe connected to the outlet, in a direction parallel to the axial direction; Having; first and discharge tubes arranged along a direction in which the difference. According to the valve device of this aspect, since the first discharge pipe of the seat support member is arranged along the direction intersecting the direction parallel to the axial direction, the second fluid is passed from the discharge port in the axial direction. In contrast, it can be discharged diagonally. For this reason, since the second fluid can be discharged in a spiral toward the valve body inside the opening, it is possible to improve the performance of removing foreign substances adhering to the surface of the valve body.

(2) In the valve device of the above aspect, the valve box has the supply port; the seat support member communicates with the first discharge pipe and is supplied from the supply port via the valve box. A communication port that receives the second fluid; and at least one of the seat support member and the valve box communicates with the communication port and the supply port, and is formed over the entire circumference. An annular groove may be formed. According to the valve device of this aspect, since the annular groove formed over the entire circumference is formed in at least one of the seat support member and the valve box, it is supplied from the supply port via the valve box. The second fluid can be made to flow over the entire circumference using the annular groove. For this reason, the second fluid can be supplied to the communication port even in a configuration in which the circumferential position of the supply port does not match the circumferential position of the communication port. In addition, in the configuration including a plurality of first discharge pipes and communication ports, it is possible to suppress the amount of the second fluid supplied to each communication port from becoming uneven.

(3) In the valve device according to the above aspect, the seat support member may further include a flange portion that is in contact with the end face in the axial direction of the valve box from the outside of the valve box and connected to the end face. Good. According to the valve device of this aspect, since the seat support member includes the flange portion, the seat support member can be easily connected to the piping of the upstream flow path and the valve box, respectively, and the connection can be easily released.

(4) In the valve device according to the above aspect, the seat support member includes a plurality of the discharge ports and a plurality of the first discharge pipes; parallel to each of the first discharge pipes and the axial direction. The angles formed with each other direction may be equal to each other. According to the valve device of this aspect, the angles formed by the first discharge pipes and the direction parallel to the axial direction are equal to each other. Therefore, when the second fluid is discharged from the discharge port, The second fluid to be discharged can be easily swirled. For this reason, it can suppress more reliably that a foreign material remains on the surface of a valve body.

(5) In the valve device according to the above aspect, the seat support member may include four or more discharge ports formed at different positions along the circumferential direction at the distal end portion. According to the valve device of this aspect, since the seat support member includes four or more discharge ports formed at different positions along the circumferential direction, when the second fluid is discharged from the discharge port, the opening of the opening is formed. The second fluid discharged inside can be easily made into a vortex. For this reason, it can suppress more reliably that a foreign material remains on the surface of a valve body.

(6) In the valve device according to the aspect described above, at least one of the valve box and the seat support member may include a plurality of the supply ports including the two supply ports shifted from each other by 180 degrees. According to the valve device of this aspect, since the plurality of supply ports including the two supply ports shifted from each other by 180 degrees are provided, the amount of the second fluid supplied to the first discharge pipe is not uniform in the circumferential direction. Can be suppressed.

(7) In the valve device according to the above aspect, the valve body may be constituted by a double eccentric structure valve. According to the valve device of this embodiment, the valve body is constituted by the double eccentric structure valve, so that the valve body and the seat member are damaged due to the presence of foreign matter between the valve body and the seat member. This can be suppressed.

(8) According to another aspect of the present invention, a sheet support member is provided. The seat support member is a seat support member used in a valve device disposed in the middle of the flow path of the first fluid; the valve device has a cylindrical valve box having an opening communicating with the flow path A valve body that is disposed inside the valve box and changes the opening of the opening; and a seat member that is provided around the opening and is in close contact with the valve body when the opening is in a closed state; The seat support member is inserted at least in part into the opening of the valve box, and supports the seat member by a distal end portion in an insertion direction; and is exposed to the valve body side at the distal end portion. A first discharge pipe that is formed along the direction intersecting with the direction parallel to the axial direction, the first discharge pipe connected to the discharge port. And comprising; According to the seat support member of this aspect, since the first discharge pipe of the seat support member is arranged along the direction intersecting the direction parallel to the axial direction, when used in the valve device, The two fluids can be discharged obliquely with respect to the axial direction from the discharge port. For this reason, since the second fluid can be discharged in a spiral toward the valve body inside the opening, it is possible to improve the performance of removing foreign substances adhering to the surface of the valve body.

  The present invention can be realized in various forms. For example, it is realizable with forms, such as a manufacturing method of a valve device, a manufacturing method of a sheet support member used for a valve device, and a foreign substance removal method of a valve device.

It is explanatory drawing which shows schematic structure of the valve apparatus as one Embodiment of this invention. It is explanatory drawing which shows the one part cross section along the 2-2 line of FIG. It is an enlarged view which expands and shows the area | region 3 of FIG. It is a perspective view which shows the external appearance structure of a sheet | seat support member. It is a perspective view which shows the external appearance structure of a sheet | seat support member. It is a front view which shows the external appearance structure of a sheet | seat support member. It is explanatory drawing for demonstrating the opening / closing operation | movement of a valve mechanism part. It is explanatory drawing for demonstrating the opening / closing operation | movement of a valve mechanism part. It is explanatory drawing for demonstrating the opening / closing operation | movement of a valve mechanism part.

A. Embodiment:
A-1. overall structure:
FIG. 1 is an explanatory diagram showing a schematic configuration of a valve device as one embodiment of the present invention. FIG. 2 is an explanatory diagram showing a partial cross section taken along line 2-2 of FIG. FIG. 3 is an enlarged view showing a region 3 of FIG. 2 in an enlarged manner. In FIG. 1, while showing the external appearance structure of the valve apparatus 100, the cross-sectional shape of the valve apparatus 100 is shown in the part of the right side which makes the rotating shaft AX of the valve body 50 a boundary. In FIG. 2, the external structure of the air cylinder 10 and the cross section of the valve mechanism part 20 are shown, and the direction D in which the fluid flows is indicated by a white arrow. 1 to 3 show an X axis, a Y axis, and a Z axis that are orthogonal to each other. The X-axis, Y-axis, and Z-axis in FIGS. 1 to 3 correspond to the X-axis, Y-axis, and Z-axis in the other drawings, respectively.

  The valve device 100 is disposed in the middle of a flow path through which a fluid containing a foreign substance such as ash flows in an incineration facility such as sewage sludge, and switches between opening and closing of the flow path. The valve device 100 includes an air cylinder 10 and a valve mechanism unit 20.

  The air cylinder 10 drives the valve mechanism unit 20. The air cylinder 10 includes a piston (not shown) inside, and the piston slides with compressed air to rotate the valve rod 40 of the valve mechanism unit 20.

  The valve mechanism part 20 opens and closes the connected flow path. The valve mechanism 20 in the present embodiment is configured by a so-called two-way valve. The opening / closing operation of the valve mechanism unit 20 will be described later. As shown in FIG. 2, the valve mechanism unit 20 includes a valve box 30, a valve rod 40, a valve body 50, a seat member 60, and a seat support member 70.

  The valve box 30 has a substantially cylindrical appearance. An opening 31 and a through hole 35 are formed in the valve box 30. The opening 31 is formed by the inner peripheral surface of the valve box 30 and communicates with the upstream flow path Pu and the downstream flow path Pd. In FIG. 2, the valve device 100 in a closed state in which the valve body 50 blocks the opening 31 is illustrated. The through hole 35 is formed on the + Z direction side at the approximate center in the axial direction of the valve box 30. A valve rod 40 is rotatably inserted into the through hole 35.

  The valve box 30 has an upstream flange portion 32 and a downstream flange portion 38. The upstream flange portion 32 has an annular outer shape, and constitutes an upstream end surface of the valve box 30. The upstream flange portion 32 is connected to a flange portion 71 of a seat support member 70 described later. The downstream flange portion 38 has an annular outer shape and constitutes an end surface on the downstream side of the valve box 30. A cylindrical pipe (not shown) constituting the downstream flow path Pd is connected to the downstream flange 38 using a bolt and a nut (not shown).

  As shown in FIG. 1, the upstream flange portion 32 is formed with two supply ports 33 and two valve box passages 34. The two supply ports 33 are formed 180 degrees apart from each other at the radially outer end of the upstream flange portion 32. Foreign air removal air is supplied to the supply port 33 from the outside. As shown in FIG. 3, each valve box passage 34 communicates with each supply port 33 and penetrates the upstream flange portion 32 radially inward.

  As shown in FIG. 2, the valve stem 40 rotates by the output from the air cylinder 10. One end of the valve stem 40 is connected to the air cylinder 10, and the other end is connected to the valve body 50. The valve stem 40 rotates the valve body 50 in an angle range of 90 degrees. The rotation axis AX of the valve stem 40 and the rotation axis AX of the valve body 50 coincide.

  The valve body 50 is disposed inside the valve box 30. The valve body 50 includes an arcuate part 51, an upper arm part 55, and a lower arm part 56. The arcuate part 51 has a substantially disk-like appearance. More specifically, the sphere is cut out by two planes perpendicular to one radial direction of the virtual sphere and parallel to each other located on the same side with respect to the center of the sphere. It has such an external shape. That is, the shape of the side end face 52 of the arcuate part 51 is a convex curved surface that constitutes a part of the sphere. The arcuate part 51 is supported by the upper arm part 55 and the lower arm part 56.

  Each of the upper arm portion 55 and the lower arm portion 56 has a curved plate-like appearance. The upper arm portion 55 is connected to the valve stem 40. The lower arm portion 56 is connected to a support pin 41 arranged on the same axis as the rotation axis AX of the valve stem 40. The upper arm portion 55 and the lower arm portion 56 rotate together with the arcuate portion 51 in an angle range of 90 degrees around the rotation axis AX of the valve stem 40 inside the valve box 30. The valve body 50 is provided rotatably inside the valve box 30, thereby changing the opening degree of the opening 31 of the valve box 30.

  The seat member 60 has an annular outer shape and is disposed around the opening 31 of the valve box 30. As shown in FIG. 2, the seat member 60 is disposed upstream of the rotation axis AX of the valve body 50. The axis PC of the sheet member 60 coincides with the axis PC of the flow paths Pu and Pd. As shown in FIG. 3, the sheet member 60 has a seal surface 61. The seal surface 61 constitutes a surface on the side facing the valve body 50. The shape of the seal surface 61 is a substantially spherical concave surface. The sheet member 60 is urged by a leaf spring 65, and is configured to be slightly movable along an axis parallel to the X axis. For this reason, the seal surface 61 is in close contact with the side end surface 52 of the arcuate portion 51 of the valve body 50 when the opening of the opening 31 is in the closed state.

  The valve mechanism unit 20 of the present embodiment is configured by a valve body 50 of a double eccentric structure valve. That is, the rotational axis AX of the valve body 50 is eccentric with respect to the axis PC of the seat member 60, and the rotational axis AX of the valve body 50 is eccentric with respect to the seal surface 61 of the seat member 60.

A-2. Configuration of sheet support member:
4 and 5 are perspective views showing the external configuration of the sheet support member 70. FIG. FIG. 6 is a front view showing an external configuration of the sheet support member 70. FIG. 6 shows a view of the sheet support member 70 viewed from the downstream side. 4 to 6, the second discharge pipe 76 and the first discharge pipe 77 formed on the sheet support member 70 are indicated by broken lines.

  The sheet support member 70 has a substantially cylindrical appearance. The sheet support member 70 includes a flange portion 71 and an insert portion 72. The flange portion 71 has substantially the same outer diameter as the outer diameter of the valve box 30. As shown in FIG. 2, the flange portion 71 is connected in contact with the upstream flange portion 32 of the valve box 30 from the outside of the valve box 30. Further, the upstream flange portion 32 and the flange portion 71 are connected to a cylindrical pipe (not shown) constituting the upstream flow path Pu using bolts and nuts (not shown).

  As shown in FIG. 3, the insert portion 72 is connected to the downstream side of the flange portion 71 and is inserted inside the valve box 30. In FIG. 3, the space surrounded by the distal end portion 73 in the insertion direction of the insert portion 72 indicated by the alternate long and short dash line and the inner wall surface 36 of the valve box 30 functions as the seat member accommodating portion 69. The sheet member accommodating portion 69 accommodates the sheet member 60, the leaf spring 65, and the like. The sheet support member 70 supports the sheet member 60 along the axial direction and the circumferential direction by the distal end portion 73.

  As shown in FIG. 3, the insert portion 72 includes an annular groove 74, a communication port 75, a second discharge pipe 76, a first discharge pipe 77, and a discharge port 78. The annular groove 74 is formed on the outer peripheral surface of the insert portion 72 at an axial position corresponding to the valve box passage 34 over the entire circumference. The communication port 75 is formed on the inner side in the radial direction in the annular groove 74 (that is, the bottom portion of the annular groove 74), and receives the foreign matter removing air supplied from the supply port 33 through the valve box 30. That is, the annular groove 74 communicates with the communication port 75 and the supply port 33.

  As shown in FIGS. 3 to 6, the second discharge pipe 76 communicates with the communication port 75 and is formed from the outer peripheral surface of the insert portion 72 toward the inside in the radial direction. As shown in FIG. 3, the second discharge pipe 76 does not penetrate radially inward. The second discharge pipe 76 has a linear appearance formed with a constant diameter. The first discharge pipe 77 is formed continuously with the second discharge pipe 76 and the discharge port 78. The first discharge pipe 77 has a linear appearance formed with a constant diameter, and is formed substantially parallel to the inner peripheral surface of the insert portion 72. The discharge port 78 is formed to be exposed to the valve body 50 side at the distal end portion 73 of the seat support member 70. The discharge port 78 is formed in the vicinity of the seal surface 61 and discharges foreign matter removing air to the valve body 50 side.

  As shown in FIG. 5, the 1st discharge pipe 77 is arrange | positioned along the direction which cross | intersects the direction parallel to an axial direction. In the present embodiment, the angle θ formed between the first discharge pipe 77 and the direction parallel to the axial direction is about 25 degrees. In the present embodiment, each of the eight communication ports 75, the second discharge pipe 76, the first discharge pipe 77, and the discharge port 78 are formed at equal intervals along the circumferential direction. In the present embodiment, the angles θ formed by the first discharge pipes 77 and the direction parallel to the axial direction are equal to each other.

  In this embodiment, the valve box 30, the valve stem 40, the valve body 50, the seat member 60, and the seat support member 70 are all formed of stainless steel. In addition, it may replace with stainless steel and may be formed with other arbitrary metal materials, such as ductile cast iron and bronze. The sheet member 60 may be formed of a resin such as PTFE.

  In the present embodiment, the fluid containing foreign matter such as ash corresponds to a subordinate concept of the first fluid in the means for solving the problem, and the air for removing the foreign matter is the second in the means for solving the problem. It corresponds to the subordinate concept of fluid.

A-3. Opening / closing operation of valve mechanism:
7 to 9 are explanatory views for explaining the opening / closing operation of the valve mechanism section 20. FIG. 7 shows a fully opened state. FIG. 8 shows a state during the transition from the fully opened state to the closed state. FIG. 9 shows a closed valve state. 7 to 9 show a part of a cross section of the valve mechanism 20 viewed from the + Z direction side.

  As shown in FIG. 7, the opening of the opening 31 is fully opened when the arcuate portion 51 of the valve body 50 is rotated to a position shifted by 90 degrees with respect to the opening 31. When the opening of the opening 31 is in a fully opened state, the fluid flowing from the upstream flow path Pu flows along the direction D through the opening 31 and is discharged to the downstream flow path Pd.

  As shown in FIG. 8, the opening degree of the opening 31 shifts from the fully open state to the closed state when the valve body 50 rotates. The state shown in FIG. 8 can be said to be a valve open state because the arcuate portion 51 of the valve body 50 does not block the opening 31. When the opening of the opening 31 is in the valve open state, the seal surface 61 of the seat member 60 and the side end surface 52 of the valve body 50 are not in contact with each other. Note that the same state as that of FIG. 8 is obtained when the valve is shifted from the closed state to the fully opened state.

  As shown in FIG. 9, when the valve body 50 further rotates, the opening degree of the opening 31 becomes a valve-closed state. When the opening of the opening 31 is closed, the seal surface 61 of the seat member 60 and the side end surface 52 of the valve body 50 are in close contact with each other. When the arcuate portion 51 of the valve body 50 completely closes the opening 31, the fluid flowing from the upstream flow path Pu is blocked. The valve mechanism part 20 of this embodiment is comprised by the valve body 50 of the double eccentric structure valve as mentioned above. For this reason, the seal surface 61 and the side end surface 52 start to contact each other before the opening degree of the opening 31 becomes the valve-closed state, and come into close contact when the valve-close state is reached.

A-4. Air discharge operation:
In the valve device 100 of the present embodiment, air for removing foreign matter is discharged in conjunction with the opening of the opening 31. More specifically, the foreign matter removing air is discharged at a timing immediately before the opening degree of the opening 31 is changed from the open state to the closed state and a timing immediately before the opening state is changed from the closed state to the open state. Air is supplied from an air compressor (not shown) to the two supply ports 33 via a pipe (not shown). Switching between air supply and stop is performed by a solenoid valve (not shown) controlled by a CPU (not shown). The CPU controls the air cylinder 10 together to link the opening degree of the opening 31 with the air discharge timing.

  The air supplied to the supply port 33 shown in FIG. 3 flows in each valve box passage 34 radially inward and reaches the annular groove 74. The air flowing in the circumferential direction in the annular groove 74 flows into the second discharge pipe 76 and the first discharge pipe 77 through each communication port 75 and is discharged from the discharge port 78 to the valve body 50 side.

  In the sheet support member 70 of the present embodiment, each of the first discharge pipes 77 is formed so as to form an angle θ of about 25 degrees with a direction parallel to the axial direction. The air discharged from the discharge port 78 through the discharge is discharged obliquely with respect to the axial direction. For this reason, the air discharged from the eight discharge ports 78 flows in a spiral shape inside the opening 31.

  When the opening of the opening 31 is in the open state, foreign matter such as ash contained in the fluid adheres to the surface of the arcuate portion 51 and the surface of the side end surface 52 of the valve body 50. When air is discharged from the discharge port 78 toward the valve body 50 at the timing immediately before the opening of the opening 31 is closed, the foreign matter adhering to the surface of the valve body 50 flows in a spiral shape. Removed by. More specifically, since the arcuate portion 51 of the valve body 50 is in a state immediately before closing the opening 31, air flows in a spiral shape on the surface of the arcuate portion 51 and rebounds on the surface of the arcuate portion 51. For this reason, the foreign material adhering to the surface of the arcuate part 51 and the surface of the side end surface 52 is mainly blown away to the upstream side. Therefore, the side end surface 52 of the valve body 50 and the seal surface 61 of the seat member 60 can be brought into close contact with each other with the foreign matter removed, and the opening 31 can be closed, and the side end surface 52 and the seal surface 61 can be closed. It can suppress that a foreign material is pinched | interposed between. Therefore, it is possible to prevent the side end surface 52 and the seal surface 61 from being damaged along with the rotation of the valve body 50 due to the presence of foreign matter between the side end surface 52 and the seal surface 61.

  In the timing immediately before the valve-opening state is changed to the valve-opening state, foreign matter such as ash contained in the fluid adheres or accumulates on the surface of the arcuate portion 51 of the valve body 50. Similarly, when the air is discharged from the discharge port 78 to the valve body 50 side at the timing immediately before the valve-open state is changed to the valve-open state, the foreign matter attached or deposited on the surface of the valve body 50 is spiral. It is removed by the air flowing in Therefore, the contact between the side end surface 52 and the seal surface 61 can be released in a state where the foreign matter is removed. Therefore, it is possible to prevent the side end surface 52 and the seal surface 61 from being damaged along with the rotation of the valve body 50 due to the presence of foreign matter between the side end surface 52 and the seal surface 61.

  In addition, in the aspect in which each 1st discharge pipe was formed along the direction parallel to an axial direction, since the air discharged from each discharge port is not discharged diagonally with respect to an axial direction, air is not discharged in a spiral shape. . For this reason, the flow of air discharged from each discharge port is not regulated. Foreign matter remains on the surface of the valve body.

  According to the valve device 100 of the present embodiment described above, the first discharge pipe 77 of the seat support member 70 is disposed along the direction intersecting the direction parallel to the axial direction. The air can be discharged obliquely from the discharge port 78 with respect to the axial direction. For this reason, since air can be discharged in a spiral shape toward the valve body 50 inside the opening 31, it is possible to improve the performance of removing foreign substances adhering to the surface of the valve body 50. Accordingly, it is possible to suppress damage to the valve body 50 and the seat member 60 due to the presence of foreign matter between the valve body 50 and the seat member 60, and the adhesion between the valve body 50 and the seat member 60 is reduced. It is possible to prevent the fluid from leaking from the opening 31. Moreover, it can suppress that the torque of the valve body 50 raises by having a foreign material intervening between the valve body 50 and the sheet | seat member 60, and can suppress the malfunctioning of the valve apparatus 100. FIG.

  Further, since the angles θ formed by the first discharge pipes 77 and the direction parallel to the axial direction are equal to each other, when the foreign matter removing air is discharged from the discharge port 78, it is discharged inside the opening 31. Air can be easily swirled. For this reason, it can suppress more reliably that a foreign material remains on the surface of the valve body 50. FIG. In addition, since eight discharge ports 78 are formed in the sheet support member 70, when the foreign matter removing air is discharged from the discharge ports 78 as compared with a mode in which the number of the discharge ports 78 is small, the openings 31 are formed. The air discharged inside can be easily swirled.

  Further, since the seat support member 70 includes the annular groove 74, the air flowing from the valve box passage 34 can be made to flow over the entire circumference using the annular groove 74. For this reason, by shifting the phase between the circumferential position of the supply port 33 and the circumferential position of the communication port 75, the circumferential position of the communication port 75 does not coincide with the circumferential position of the supply port 33. Also, air can be supplied, and the formation of too many supply ports 33 can be suppressed. Moreover, it can suppress that the quantity of the air supplied to each communicating port 75 becomes non-uniform | heterogenous. In addition, since the supply port 33 is formed in the valve box 30, air can be spread all around using the annular groove 74, so that the structure for spreading the air around the whole circumference can be simplified. It can suppress that the manufacturing process of the sheet | seat support member 70 becomes complicated. Further, since the two supply ports 33 are formed so as to be shifted from each other by 180 degrees, it is possible to suppress the amount of air supplied to the annular groove 74 and the first discharge pipe 77 from becoming uneven in the circumferential direction. In addition, since the seat support member 70 includes the flange portion 71, the seat support member 70 can be easily connected to the piping and the valve box 30 constituting the upstream flow path Pu, and the connection can be easily released. Further, since the valve body 50 is constituted by a double eccentric structure valve, the side end face 52 and the seal face 61 are not completely in contact with each other until the opening degree of the opening 31 is completely closed. For this reason, it is possible to prevent the side end surface 52 and the seal surface 61 from being damaged due to the presence of foreign matter between the side end surface 52 and the seal surface 61.

B. Other embodiments:
B-1. Other Embodiment 1:
In the above embodiment, each of the eight communication ports 75, the second discharge pipe 76, the first discharge pipe 77, and the discharge port 78 are formed at regular intervals along the circumferential direction. The invention is not limited to this. The numbers of the communication ports 75, the second discharge pipes 76, the first discharge pipes 77, and the discharge ports 78 are not limited to eight, and may be set to other arbitrary numbers such as 16, 32, for example. . In addition, it is preferable to set the number to 2 or more, and more preferable to set the number to 4 or more, from the viewpoint of stably discharging the air for removing foreign substances in a spiral shape. Moreover, each communication port 75, the 2nd discharge pipe 76, the 1st discharge pipe 77, and the discharge port 78 may be located in a line with a mutually different space | interval along the circumferential direction. In addition, it is preferable that the air for removing foreign substances is arranged at equal intervals from the viewpoint of stably discharging the air in a spiral shape. That is, in general, the sheet support member 70 may include four or more discharge ports 78 formed at different positions along the circumferential direction at the distal end portion 73. Even with this configuration, the same effect as the valve device 100 of the embodiment can be obtained.

B-2. Other embodiment 2:
In the above embodiment, the angle θ formed between each of the first discharge pipes 77 and the direction parallel to the axial direction is about 25 degrees, but is not limited to about 25 degrees and may be any other angle. May be. For example, it may be about 15 degrees or about 35 degrees. In addition, from the viewpoint of stably discharging the air for removing foreign substances in a spiral shape, it is preferably about 10 degrees or more, and from the viewpoint of suppressing the strength reduction of the insert portion 72, it is preferably about 45 degrees or less. Further, the angle θ formed between each of the first discharge pipes 77 and the direction parallel to the axial direction may be different from each other. Further, each of the first discharge pipes 77 may be formed so that the air is discharged in a clockwise spiral shape, or each of the first discharge pipes 77 is formed so as to be discharged in a counterclockwise spiral shape. May be. Even with this configuration, the same effect as the valve device 100 of the embodiment can be obtained.

B-3. Other embodiment 3:
In the above embodiment, the annular groove 74 is formed in the seat support member 70, but may be formed in the valve box 30, or may be formed in both the seat support member 70 and the valve box. . That is, generally, at least one of the seat support member 70 and the valve box 30 is formed with an annular groove 74 that communicates with the communication port 75 and the supply port 33 and is formed over the entire circumference. Also good. By forming the annular groove 74, air can be supplied to the communication port 75 even in a configuration in which the circumferential position of the supply port 33 and the circumferential position of the communication port 75 do not match. Moreover, the aspect by which the annular groove 74 was abbreviate | omitted may be sufficient. In such an aspect, the valve box passage 34 and the communication port 75 may directly communicate with each other. Even with such a configuration, the same effect as the valve device 100 of the embodiment can be obtained.

B-4. Other embodiment 4:
In the embodiment described above, the two supply ports 33 that are shifted from each other by 180 degrees are formed in the valve box 30, but the present invention is not limited to this. The supply port 33 may be formed in the seat support member 70, or may be formed in both the valve box 30 and the seat support member 70. Further, the number of supply ports 33 may be one or any number of three or more. From the viewpoint of suppressing the amount of air supplied to the annular groove 74 and the first discharge pipe 77 from becoming uneven in the circumferential direction, a plurality of supplies including two supply ports 33 that are shifted from each other by 180 degrees. A mouth 33 is preferably provided. Even with this configuration, the same effect as the valve device 100 of the embodiment can be obtained.

B-5. Other embodiment 5:
The configurations of the second discharge pipe 76 and the first discharge pipe 77 in the above embodiment are merely examples, and various modifications can be made. For example, at least a part of the second discharge pipe 76 and the first discharge pipe 77 may be formed in a curved shape. Further, for example, the second discharge pipe 76 may be formed in a direction intersecting with the radial direction of the sheet support member 70, and its own diameter may not be constant. Further, for example, the first discharge pipe 77 may be formed in a direction intersecting with the inner peripheral surface of the insert portion 72, may have a diameter increased toward the discharge port 78, or may have a reduced diameter. Good. Even with this configuration, the same effect as the valve device 100 of the embodiment can be obtained.

B-6. Other embodiment 6:
The sheet support member 70 of the above embodiment has the flange portion 71, but may be an aspect in which the flange portion 71 is omitted. In such an embodiment, the pipes constituting the flow paths Pu and Pd and the valve device 100 may be connected by screwing or welding. Even with this configuration, the same effect as the valve device 100 of the embodiment can be obtained.

B-7. Other embodiment 7:
Although the valve device 100 of the above embodiment includes the valve body 50 of the double eccentric structure valve, the valve apparatus 100 is not limited to the double eccentric structure valve, and may be any other valve structure. For example, a single eccentric structure valve or a valve structure without eccentricity may be used. Further, the present invention may be applied to other arbitrary rotary type valve devices such as a ball valve and a butterfly valve. Further, for example, the present invention is not limited to a rotary type valve device, but is applied to a pressing type valve device such as a ball shape, a slide type valve device such as a gate valve, and a crushing type valve device such as a diaphragm valve. Also good. Even in such a configuration, the first discharge pipe 77 of the seat support member 70 is arranged along the direction intersecting the direction parallel to the axial direction of the seat support member 70, thereby allowing air to be vented inside the opening 31. Since it can discharge | emit to the body 50 in a vortex shape, the removal performance of the foreign material adhering to the surface of the valve body 50 can be improved.

B-8. Other embodiment 8:
In the valve device 100 of the above-described embodiment, air for removing foreign substances is supplied at a timing immediately before the opening degree of the opening 31 is changed from the open state to the closed state and at a timing immediately before the opening state is changed from the closed state to the open state. Although it discharged, this invention is not limited to this. For example, the air may be discharged at any other timing or intermittently. Further, for example, instead of air, foreign substances may be removed by discharging other arbitrary fluid such as nitrogen gas, cold / hot water, and steam. Even with this configuration, the same effect as the valve device 100 of the embodiment can be obtained.

B-9. Other embodiment 9:
Although the valve device 100 of the above embodiment is driven by the air cylinder 10, it may be driven by a motor or a manual handle instead of the air cylinder 10. Further, the direction in which the valve device 100 is arranged may be appropriately set according to the fluid flow path. Moreover, the valve apparatus 100 may be used not only for incineration facilities such as sewage sludge but also for manufacturing facilities and wastewater facilities in factories. Further, the valve device 100 is not limited to powder foreign matters such as ash, but may be used in a fluid flow path including solid matters such as iron scraps and foreign matters such as hair.

  The present invention is not limited to the above-described embodiment, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features in the embodiments corresponding to the technical features in each embodiment described in the summary section of the invention are intended to solve part or all of the above-described problems, or one of the above-described effects. In order to achieve part or all, replacement or combination can be appropriately performed. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Air cylinder 20 ... Valve mechanism part 30 ... Valve box 31 ... Opening 32 ... Upstream flange part 33 ... Supply port 34 ... Valve box passage 35 ... Through-hole 36 ... Inner wall surface 38 ... Downstream flange part 40 ... Valve rod DESCRIPTION OF SYMBOLS 41 ... Support pin 50 ... Valve body 51 ... Arched part 52 ... Side end surface 55 ... Upper arm part 56 ... Lower arm part 60 ... Sheet member 61 ... Sealing surface 65 ... Leaf spring 69 ... Sheet member accommodating part 70 ... Sheet support member 71 ... Flange portion 72 ... insert portion 73 ... tip portion 74 ... annular groove 75 ... communication port 76 ... second discharge pipe 77 ... first discharge pipe 78 ... discharge port 100 ... valve device AX ... rotating shaft D ... direction PC ... axis Pd ... channel Pu ... channel

Claims (8)

A valve device disposed in the middle of the flow path of the first fluid,
A cylindrical valve box having an opening communicating with the flow path;
A valve body arranged inside the valve box to change the opening of the opening;
A seat member provided around the opening and in close contact with the valve body when the opening is in a closed state;
A cylindrical seat support member, at least a part of which is inserted into the opening of the valve box, and supporting the seat member along the circumferential direction by a tip portion in the insertion direction;
With
At least one of the valve box and the seat support member has a supply port to which a second fluid is supplied from the outside,
The sheet support member is
An exhaust port that is formed to be exposed to the valve body side at the distal end, and discharges the second fluid;
A first discharge pipe connected to the discharge port, the first discharge pipe arranged along a direction intersecting a direction parallel to the axial direction;
Having
Valve device. The valve device according to claim 1,
The valve box has the supply port,
The seat support member has a communication port that communicates with the first discharge pipe and receives the second fluid supplied from the supply port via the valve box,
At least one of the seat support member and the valve box communicates with the communication port and the supply port, respectively, and is formed with an annular groove formed over the entire circumference.
Valve device. The valve device according to claim 1 or 2,
The sheet support member further includes
A flange portion connected to the end face in contact with the axial end face of the valve box from the outside of the valve box;
Valve device. The valve device according to any one of claims 1 to 3,
The sheet support member includes a plurality of the discharge ports and a plurality of the first discharge pipes,
The angles formed by each of the first discharge pipes and the direction parallel to the axial direction are equal to each other,
Valve device. The valve device according to any one of claims 1 to 4,
The sheet support member is
In the tip portion, provided with four or more discharge ports formed at different positions along the circumferential direction,
Valve device. The valve device according to any one of claims 1 to 5,
At least one of the valve box and the seat support member is
A plurality of the supply ports including two of the supply ports shifted from each other by 180 degrees;
Valve device. The valve device according to any one of claims 1 to 6,
The valve body is constituted by a double eccentric structure valve,
Valve device. A seat support member used in a valve device disposed in the middle of the flow path of the first fluid,
The valve device includes a cylindrical valve box having an opening communicating with the flow path, a valve body that is disposed inside the valve box and changes an opening degree of the opening, and is provided around the opening. A seat member that is in close contact with the valve body when the opening is in a closed state;
The sheet support member is
At least a part of itself is inserted into the opening of the valve box, and the seat member is supported by a tip portion in the insertion direction.
A discharge port that is formed to be exposed to the valve body side at the tip portion and discharges the second fluid;
A first discharge pipe connected to the discharge port, the first discharge pipe arranged along a direction intersecting a direction parallel to the axial direction;
Comprising
Sheet support member.

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