Abstract
A valve for use in a cracking process includes an erosion protection device. The erosion protection device includes at least one baffle projector beyond a contour of an inner wall of the closure part. The closure part is positioned between a first housing part and a second housing part. The expansion protection device minimizes the direct impact on the sealing surface and sealing seats of the value.
Claims
1.-24. (canceled)
25. A double gate valve comprising; a housing with a first housing part having an inner wall; a second housing part having an inner wall; and a closure part which is arranged in a movable manner between the first housing part and the second housing part, the closure part having an inner wall; wherein, in an open position of the valve, an exit opening of the first housing part is assigned to an entry opening of the closure part and an exit opening of the closure part is assigned to an entry opening of the second housing part, the valve having at least one baffle projecting beyond a contour of the inner wall of the closure part, wherein the at least one baffle is arranged on the inner wall of the closure part to provide erosion protection.
26. The valve according to claim 1, wherein the erosion-protection device comprises at least one baffle projecting beyond a contour of the inner wall of the first housing part and/or of the inner wall of the second housing part.
27. The valve according to claim 25, wherein the closure part comprises a pipe bridge, wherein, in an open position of the valve, the pipe bridge arranged in a connecting manner between the first housing part and the second housing part, and wherein the inner wall of the closure part forms an inner wall of the pipe bridge.
28. The valve according to claim 25, wherein at least one baffle is arranged in a peripheral region of the entry opening of the closure part.
29. The valve according to claim 25, wherein at least one baffle is arranged in a peripheral region of the exit opening of the closure part.
30. The valve according to claim 25, wherein at least one baffle is arranged on the inner wall of the first housing part and/or at least one baffle is arranged on the inner wall of the second housing part.
31. The valve according to claim 25, wherein at least one baffle is arranged in a peripheral region of the exit opening of the first housing part.
32. The valve according to claim 25, wherein at least one baffle comprises at least one plate-like part.
33. The valve according to claim 25, wherein at least one baffle comprises at least one surface which is formed orthogonally in relation to the contour of the inner wall of the closure part, of the inner wall of the first housing part and/or of the inner wall of the second housing part.
34. The valve according to claim 25, wherein at least one baffle comprises at least one surface which is inclined in relation to the contour of the inner wall of the closure part, of the inner wall of the first housing part and/or of the inner wall of the second housing part.
35. The valve according to claim 25, wherein at least one baffle comprises at least one curved surface.
36. The valve according to claim 25, wherein at least one baffle comprises an erosion-resistant coating.
37. The valve according to claim 25, wherein at least one baffle is formed in one piece with the first housing part, the second housing part and/or the closure part.
38. The valve according to claim 25, wherein at least one baffle is fastened on the first housing part, on the second housing part and/or on the closure part by mechanical fastening means.
39. A method of use of a valve according to claim 28 in a cracking or coking process.
40. A method of avoiding erosion in a valve with a first housing part having an inner wall, with a second housing part having an inner wall and with a closure part which is arranged in a movable manner between the first housing part and the second housing part and has an inner wall, wherein, in an open position of the valve, an exit opening of the first housing part is assigned to an entry opening of the closure part and an exit opening of the closure part is assigned to an entry opening of the second housing part, wherein the valve is designed in the form of a double-gate valve, wherein a through-going flow is at least partially braked and/or deflected by virtue of an erosion device being arranged in the valve and characterized in that the erosion-protection device comprises at least one baffle projecting beyond a contour of the inner wall of the closure part, wherein the at least one baffle is arranged on the inner wall of the closure part.
41. The method according to claim 40, wherein the erosion-protection device comprises at least one baffle projecting beyond a contour of the inner wall of the first housing part and/or of the inner wall of the second housing part.
42. The method according to claim 40, wherein the closure part comprises a pipe bridge, wherein, in an open position of the valve, the pipe bridge can be arranged in a connecting manner between the first housing part and the second housing part, and wherein the inner wall of the closure part forms an inner wall of the pipe bridge.
43. The method according to claim 40, wherein at least one baffle is arranged in a peripheral region of the entry opening of the closure part.
44. The method according to claim 40, wherein at least one baffle is arranged in a peripheral region of the exit opening of the closure part.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0059] Further advantageous embodiments of the invention can be gathered from the following drawings. Like parts and parts with a like function have the same reference signs hereinbelow. In the drawings:
[0060] FIG. 1 shows a side view of a first embodiment of a valve according to the invention;
[0061] FIG. 2 shows a longitudinal-section illustration of the valve according to FIG. 1 in a closed position;
[0062] FIG. 3 shows the valve according to FIG. 2 during transfer or transition into an open position, i.e. between the closed position and the open position;
[0063] FIG. 4 shows the valve according to FIG. 2 in an open position;
[0064] FIG. 5 shows a perspective sectional view of the valve according to FIG. 3;
[0065] FIG. 6 shows a perspective sectional view of a second embodiment of a valve according to the invention;
[0066] FIG. 7 shows an enlarged perspective sectional view of the valve according to FIG. 6;
[0067] FIG. 8 shows a perspective illustration of a detail of a third embodiment of a valve according to the invention;
[0068] FIG. 9 shows a perspective illustration of a detail of a fourth embodiment of a valve according to the invention; and
[0069] FIG. 10 shows a perspective illustration of a detail of a fifth exemplary embodiment of a valve.
DETAILED DESCRIPTION OF THE INVENTION
[0070] FIG. 1 shows that the valve 10 according to a first embodiment of the invention has a housing 12. The valve 10 may be a double-gate valve which is designed in the form of a double-slide gate. The housing 12 comprises a first housing part 14 and a second housing part 16.
[0071] FIG. 2 shows that the first housing part 14 and the second housing part 16 each have a cylindrical inner wall 18, 20. The first housing part 14 and the second housing part 16 also each have an entry opening 22, 24 and an exit opening 26, 28. A movably arranged closure part 30 is arranged between the first housing part 14 and the second housing part 16. The closure part 30 is designed in the form of a slide gate and comprises a pipe bridge 34 and a pair of gates 36. The pipe bridge 34 has an entry opening 38 and an exit opening 39. In the present case, the pipe bridge 34 comprises an upper, first pipe-bridge portion 40 with the entry opening 38 and a lower, second pipe-bridge portion 42 with the exit opening 39, wherein the pipe-bridge portions 40, 42 are connected by a flexible compensator 44. The first pipe-bridge portion 40 has a first cylindrical inner wall 46 and an annular sealing surface 47 arranged peripherally on the entry opening 38. The sealing surface 47 is directed towards the exit opening 26 of the first housing part 14 and/or aligned therewith. The second pipe-bridge portion 42 has a second cylindrical inner wall 48 and an annular sealing surface 49 arranged peripherally on the exit opening 39. The sealing surface 49 is directed towards the entry opening 24 of the second housing part 16 and/or aligned therewith.
[0072] The first housing part 14 comprises a sealing seat 50 which is designed in the form of a sealing ring and has a cylindrical inner wall 52 which, when the sealing seat 50 is in the installed position, is aligned with the cylindrical inner wall 18 of the first housing part 14. The sealing seat 50 is arranged on the exit opening 26 of the first housing part 14. The sealing seat 50 of the first housing part 14 has an annular sealing surface 53 directed away from the exit opening 26. The second housing part 16 likewise comprises a sealing seat 54 which is designed in the form of a sealing ring and has a cylindrical inner wall 56 which is aligned with the inner wall 20 of the second housing part 16. The sealing seat 54 of the second housing part 16 has an annular sealing surface 57 directed away from the entry opening 24. The exit opening 26 of the first housing part 14 is located opposite the entry opening 24 of the second housing part 16. The cylindrical inner wall 42 of the first housing part 14 is aligned with the cylindrical inner wall 46 of the second housing part 16.
[0073] In the closed position of the valve 10 shown in FIG. 2, the pair of gates 36 is arranged with sealing action upstream of the exit opening 26 of the first housing part 14 and upstream of the entry opening 24 of the second housing part 16. The annular sealing surface 53 of the sealing seat 50 of the first housing part 14 butts against the upper gate 36.1 and the annular sealing surface 57 of the sealing seat 54 of the second housing part 16 butts against the lower gate 36.2. By means of an actuating device 60, which comprises an actuating spindle 62, the slide gate or the closure part 30 can be displaced in the direction of the actuating device 60. The valve 10 has an erosion-protection device 70, which comprises a baffle 72, which is arranged in a peripheral region of the exit opening 39 of the closure part 30. The baffle 72 is arranged in a region of the inner wall 48 of the second pipe-bridge portion 42 of the pipe bridge 34 which is located closer to the actuating device 60 than other regions of the pipe bridge 34 of the closure part 30.
[0074] FIG. 3 shows that, when the actuating device 60 is actuated, the closure part 30 shifts in the direction of the actuating device 60, wherein the pair of gates 36 is moved away from the exit opening 26 of the first housing part 14 and from the entry opening 24 of the second housing part 16 and the pipe bridge 34, which is arranged alongside in the slide gate, is moved in the direction of the exit opening 26 of the first housing part 14 and of the entry opening 24 of the second housing part 16. When the valve 10 is being opened, first of all only a small gap is open between the exit opening 26 of the first housing part 14 and the entry opening 38 of the closure part 30 as a through-passage from the first housing part 14, via the pipe bridge 34 of the closure part 30, to the second housing part 16.
[0075] FIG. 4 shows the fully open position of the valve 10. This position is achieved when the entry opening 38 of the pipe bridge 34 is arranged relative to the exit opening 26 of the first housing part 14 to permit material flow and the exit opening 39 of the pipe bridge 34 is arranged relative to the entry opening 24 of the second housing part 16 to permit material flow. This position may correspond to a position where the pipe bridge 34 is assigned or aligned to the exit opening 26 of the first housing part 14 and the exit opening 39 of the pipe bridge 34 is assigned or aligned to the entry opening 24 of the second housing part 16. The annular sealing surface 53 of the first housing part 14 here butts with sealing action against the annular sealing surface 47 of the first pipe-bridge portion 40 of the pipe bridge 34 and the annular sealing surface 57 of the second housing part 16 butts with sealing action against the annular sealing surface 49 of the second pipe-bridge portion 42 of the pipe bridge 34.
[0076] FIG. 5 shows that the baffle 72 is designed in the form of a circle segment and has an arcuate edge 74 and a straight edge 76. The arcuate edge 74 butts against the cylindrical inner wall 48 of the second pipe-bridge portion 42 and is fastened thereon. The baffle 72 has two parallel surfaces 78 which are formed orthogonally or approximately orthogonally with respect or in relation to the contour of the inner wall 48 of the second pipe-bridge portion 42. One of the surfaces 78 is directed towards the entry opening 38 of the closure part 30 or of the pipe bridge 34. The other surface 78 is directed away from the entry opening 38. A respective annular hardened portion 80, 82 is formed on the sealing surface 47 and the sealing surface 49 of the closure part 30. A respective annular hardened portion 86 is formed on the upper side 84 of the upper gate 36.1 and on the underside of the lower gate 36.2. The pipe bridge 34 and the two gates 36.1, 36.2 are arranged in two spaced-apart carrier plates 88.1, 88.2 arranged one above the other. A wedge device 90 is arranged between the gates 36.1, 36.2.
[0077] FIG. 6 and FIG. 7 show a second embodiment of the valve 110 according to the invention. Said valve 110 differs from the valve 10 shown in FIGS. 1 to 5 in that the baffle 172 is arranged in a peripheral region of the entry opening 38 of the closure part, or of the pipe bridge 34. The baffle 172 has an arcuate edge 174 and a straight edge 176. The arcuate edge 174 butts against the cylindrical inner wall 46 of the first pipe-bridge portion 40 and is fastened thereon. The baffle 172 comprises two parallel surfaces 178 which are formed orthogonally or approximately orthogonally with respect or in relation to the contour of the inner wall 46 of the first pipe-bridge portion 40. One of the surfaces 178 is directed towards the entry opening 38 of the closure part 30.
[0078] FIG. 8 shows a third embodiment of the valve 210 according to the invention. Said valve 210 differs from the valve shown in FIG. 7 in that the baffle 272 is designed in the form of a ring segment. The baffle 272 has an arcuate edge 274, which butts against the inner wall of the first pipe-bridge portion 40 and is fastened thereon. Instead of the straight edge, said baffle 272 has an inwardly curved arcuate edge 276. The baffle 272 likewise comprises two parallel surfaces 278 which are formed orthogonally or approximately orthogonally with respect or in relation to the contour of the inner wall 46 of the first pipe-bridge portion 40. One of the surfaces 278 is directed towards the entry opening 38 of the closure part 30.
[0079] FIG. 9 shows a fourth embodiment of the valve 310 according to the invention. Said valve 310 differs from the valve 210 shown in FIG. 8 in that the baffle 372 is designed with an increased material thickness and has an outwardly curved surface 373 directed away from the entry opening 38 of the closure part 30. The baffle 372 has two arcuate edges 374, 376. The arcuate edge 374 butts against the cylindrical inner wall 46 of the first pipe-bridge portion 40 and is fastened thereon. The baffle 372 has a surface 378 which is formed orthogonally or approximately orthogonally with respect or in relation to the contour of the inner wall 46 of the first pipe-bridge portion 40. Said surface 378 is directed towards the entry opening 38 of the closure part 30. A concave surface 379 is arranged between said surface 378 and the inner wall 16.
[0080] The baffles 72, 172, 272, 372 are each arranged in a region of the inner wall 46, 48 of the closure part 30 which is located closer to the actuating device 60 than other regions, and therefore, when the respective valves 10, 110, 210, 310 shown in FIGS. 1 to 9 are being opened, said baffles are arranged upstream of the gap which is established between the exit opening 39 of the closure part 30 and the entry opening 24 of the second housing part 16. When the valve 10, 110, 210, 310 is being opened, the respective baffles 72, 172, 272, 372 cause the through-going flow rate of a material fed into the valve 10 to be braked or reduced and partially deflected away from the inner walls 46, 48 of the closure part 30. This results in fewer solids contained in the material making direct impact, and in any impact being less pronounced, in the region of the entry opening 24 of the second housing part 16, including the sealing surface 57 of the sealing seat 54 of the second housing part 16. Erosion is thus prevented by way of the through-going flow being influenced.
[0081] FIG. 10 shows a fifth exemplary embodiment of the valve 410. Said valve 410 differs from the valve 10 according to FIGS. 1 to 5 in that the baffle 472 is arranged on the inner wall 18 of the first housing part 14 in a peripheral region of the exit opening 26. The baffle 472 is in the form of a circle segment and has an arcuate edge 474 and a curved edge 476, wherein the arcuate edge 474 of the baffle 472 butts against the cylindrical inner wall 18 and is fastened thereon. The baffle 472 has two parallel surfaces 478 which are formed orthogonally or approximately orthogonally with respect or in relation to the contour of the inner wall of the first housing part. One of the surfaces 478 is directed towards the entry opening 22 of the first housing part 14.
[0082] The baffle 472 is arranged in a region of the inner wall 18 of the first housing part 14 which is spaced apart further from the actuating device 60 than other regions of the inner wall, and therefore, when the valve 410 is being opened, the baffle 462 is arranged upstream of the gap which is established between the exit opening 26 of the first housing part 14 and the entry opening 38 of the closure part 30, c.f. FIG. 2. When the valve 410 is being opened, the baffle 472 causes the through-going flow of a material to be braked and partially deflected away from the inner wall 18 of the first housing part 20. This results in fewer solids contained in the material making direct impact, and in any impact being less pronounced, in the region of the entry opening 38 of the closure part 30, including the annular sealing surface 47 and the hardened portion 82. Furthermore, fewer solids make direct impact, and any impact is less pronounced, in the region of the entry opening 24 of the second housing part 16, including the sealing surface 57 of the sealing seat 54 of the second housing part 16.
[0083] In some embodiments, the housing 12 or closure part 30 comprises one or more expansion bellows.
[0084] Those embodiments of the valve which are shown in the figures can be installed and used in coking or cracking plants and can be arranged, in particular, on a coking drum. It would be further appreciated that although the invention covers individual embodiments, it also includes combinations of the embodiments discussed. In particular, the features described in one embodiment, not being mutually exclusive to a feature described in another embodiment, may be combined to form yet further embodiments of the invention.
