SLIDE VALVE

Abstract

The invention relates to a slide valve (20) having a slide valve plate (32) movable in a slide valve rail (29) between a locked position and an open position in a slide valve casing (26), said slide valve rail (29) being provided with a slide valve seal for attaining a gas-proof locked position, said slide valve rail (29) being connected to the slide valve casing (26) via a flange connection in such a manner that the slide valve rail (29) is removable from the slide valve casing (26) radially to a flow axis of the slide valve (20).

Claims

1. A slide valve (20, 25) having a slide valve plate (32, 63) movable in a slide valve rail (29, 67) between a locked position and an open position in a slide valve casing (26, 78), said slide valve rail (29, 67) being provided with a slide valve seal for attaining a gas-proof locked position, characterized in that the slide valve rail (29, 67) is connected to the slide valve casing (26, 78) via a flange connection in such a manner that the slide valve rail (29, 67) is removable from the slide valve casing (26, 78) radially to a flow axis (60, 95) of the slide valve (20, 25).

2. The slide valve according to claim 1, characterized in that the slide valve rail (29, 67) has two rail halves (30, 31; 68, 69) which are provided with a seal element (33, 34; 70, 71) of the slide valve seal intended to seal against one of two vis--vis slide valve plate surfaces (45, 46).

3. The slide valve according to claim 2, characterized in that the rail halves (30, 31; 68, 69) each comprise an axial support device (47, 48) for support against the slide valve plate surfaces (45, 46) on both sides.

4. The slide valve according to claim 2, characterized in that at a casing connection side, the rail halves (30, 31; 68, 69) have a circular flange (49, 50; 83, 84) for forming the flange connection as a clamp connection (51, 52; 79, 80) using a circular flange (53, 54; 81, 82) formed at a casing part (27, 28; 76, 77) of the slide valve casing (26, 78).

5. The slide valve according to claim 2, characterized in that the rail halves (30, 31) comprise a seal carrier (35, 36) for disposing the seal element (33, 34), said seal carrier (35, 36) serving for being connected to a casing part (27, 28) of the slide valve casing (26).

6. The slide valve according to claim 2, characterized in that the rail halves (30, 31) are removable from the slide valve casing (26) independently of each other.

7. The slide valve according to claim 2, characterized in that the rail halves (30, 31) are realized differently to each other.

8. The slide valve according to claim 2, characterized in that the rail halves (68, 69) are removable from the slide valve casing (78) as a connected mounting unit (91).

9. The slide valve according to claim 8, characterized in that the slide valve plate (63) is a component of the mounting unit (91).

10. The slide valve according to claim 9, characterized in that for forming the mounting unit (91), the rail halves (68, 69) are connected to each other having the slide valve plate (63) therebetween and by means of a temporary mounting safeguard (87).

11. The slide valve according to claim 10, characterized in that for forming the mounting safeguard (87), the rail halves (68, 69) are braced against each other using axial bracing devices.

12. The slide valve according to claim 11, characterized in that the rail halves (68, 69) are formed differently to each other and the slide valve plate (63) is shaped like a cup.

13. The slide valve according to claim 12, characterized in that for disposing the seal element (70, 71), the rail halves (68, 69) comprise a seal carrier (72, 73) which simultaneously serves for forming a support device in such a manner that the support device forms a reception for the seal element (70, 71).

Description

[0021] In the following, preferred embodiments of the invention are further described by means of the drawings.

[0022] FIG. 1 illustrates in a frontal view a slide valve disposed on a blast furnace periphery and realized as a flat gate valve;

[0023] FIG. 2 illustrates in a frontal view a slide valve disposed on a blast furnace periphery and realized as a cup valve;

[0024] FIG. 3 illustrates in an isometric view the flat gate valve illustrated in FIG. 1;

[0025] FIG. 4 illustrates in a cross-sectional view the flat gate valve illustrated in FIG. 3 according to cut IV-IV;

[0026] FIG. 5 illustrates in a cross-sectional view the flat gate valve illustrated in FIG. 3 according to cut V-V;

[0027] FIG. 6 illustrates an enlarged detailed view of the flat gate valve illustrated in FIG. 5;

[0028] FIG. 7 illustrates a cross-sectional view the flat gate valve illustrated in FIG. 3 according to cut VII-VII;

[0029] FIG. 8 illustrates the flat gate valve illustrated in FIG. 3 while a rail half of a slide valve rail is being unmounted;

[0030] FIG. 9 illustrates in an isometric view the cup valve illustrated in FIG. 2;

[0031] FIG. 10 illustrates the cup valve illustrated in FIG. 9 according to cut X-X;

[0032] FIG. 11 illustrates the cup valve illustrated in FIG. 9 according to cut XI-XI;

[0033] FIG. 12 illustrates a lateral view of the cup valve illustrated in FIG. 9 having a mounting unit made up of the slide valve plate and the rail halves before being removed from the slide valve casing;

[0034] FIG. 13 illustrates the mounting unit illustrated in FIG. 12 while being removed from the slide valve casing.

[0035] FIG. 1 illustrates in a frontal view a slide valve 20 which is realized as a flat gate valve, is connected to a connection nozzle 21 of a blast furnace 22 in a blast furnace periphery and enables the gas-proof connection of a measuring probe 24 which can be inserted into the interior of the blast furnace 22 via a through opening 43 of a slide valve plate 32 illustrated in particular in FIG. 4 after the slide valve 20 has been moved from its locked position to its open position. FIG. 2 illustrates a corresponding disposition in which a slide valve 25 realized as a cup valve is connected to a connection nozzle 96 of the blast furnace 22, said slide valve 25 enabling the gas-proof connection of a measuring probe 97 disposed on a carriage 23.

[0036] As can be seen in particular in a synopsis of FIGS. 3 to 7, slide valve 20 realized in this instance as a flat gate valve comprises a slide valve casing 26 which, as illustrated in particular in FIG. 6, comprises a slide valve rail 29 having two rail halves 30, 31 between two housing parts 27, 28, a slide valve plate 32 realized as a flat plate in the instance of slide valve 20 illustrated here and realized as a flat gate valve being disposed between rail halves 30, 31.

[0037] As can be seen in particular in FIG. 6, the rail halves 30, 31 each comprise a seal element 33, 34. The seal elements 33, 34 are realized as pneumatic tube seals in this instance and therefore comprise a cavity 37 which can be pressurized with gas via a pressure pipe 62.

[0038] Besides seal elements 33, 34, rail halves 30, 31 comprise strippers 41, 42 which strip any dirt particles clinging to a closure section 44 above through opening 43 from slider plate surfaces 45, 46 when moving slide valve plate 32 into its open position illustrated in FIGS. 3 to 7 in order to protect seal elements 33, 34 from any impairments via dirt particles.

[0039] As in particular FIG. 6 illustrates, rail halves 30, 31 in the present instance moreover enable disposing one axial support device 47, 48 which serve to support the slide valve blade surfaces 45, 46 on both sides in each instance and can be realized as PTFE rings, for example.

[0040] FIG. 6 illustrates that rail halves 30, 31 each comprise a circular flange 49, 50 which are each disposed adjacent to a circular flange 53, 54 at the abutting casing part 27, 28 for forming a clamp connection 51, 52, said circular flanges 49, 53 or 50, 54 being braced against each other in the illustrated relative arrangement via two clamping rings 55, 56 realized in two parts.

[0041] As can be seen in particular in FIG. 8, each rail half 30, 31 can be radially removed from slide valve casing 26 with reference to a flow axis 60 of slide valve 20 after removing the respective clamp connection 51, 52 (FIG. 6) by releasing bolt connections 59, which each connect two half rings 57, 58 of clamping rings 55, 56 with each other, after merely a side lid 61 of the casing has been removed.

[0042] As in particular a synopsis of FIGS. 1 and 6 clearly illustrates, slide valve 20 can remain in its position at connection nozzle 21 of blast furnace 22 in order to remove side lid 61 and the following unmounting of rail halves 30, 31 of the slide valve rail 29.

[0043] FIG. 9 illustrates in an isometric view slide valve 25 realized in this instance as a cup valve and illustrated in its relative disposition to a blast furnace 22 in FIG. 2. As becomes clear in particular in the cross-sectional view according to FIG. 11, slide valve 25 comprises a spherical slide valve plate 63 which is referred to as a cup in this instance and, unlike slide valve plate 32 of slide valve 20 which is realized as a flat plate, is not provided with a translational drive device 64 (cf. FIG. 5) for translationally moving slide valve plate 32 from an open position to a locked position and vice versa but comprises a rotary drive 65 (cf. FIGS. 9 and 12) which, as indicated in FIG. 11 via the arrow, performs a rotary movement around a pivot axis 66 in order to move slide valve plate 63 from the illustrated open position to a locked position.

[0044] As FIG. 11 illustrates, a slide valve rail 67 of slide valve 25 comprises two different rail halves 68, 69 for being adjusted to the spherical embodiment of slide valve plate 63, said rail halves 68, 69 each comprising a seal carrier 72, 73 for disposing a seal element 70, 71 and simultaneously for forming an axial support device in such a manner that the support devices form a reception for seal elements 70, 71.

[0045] Corresponding to rail halves 30, 31 of slide valve 20, rail halves 68, 69 of slide valve 62 are each provided with a stripper 74, 75. In order to each be connected to a casing part 76, 77 of a slide valve casing 78, clamp connections 79, 80 are provided between the halves 68, 69 and casing parts 76, 77 in such a manner that casing parts 76, 77 and rail halves 68, 69 are each adjacently provided with circular flanges 81, 82 or 83, 84 which, as previously described with reference to FIGS. 6 and 8, are braced against each other via clamping rings 85, 86 realized in two parts.

[0046] For unmounting rail halves 68, 69, rail halves 68, 69 and slide valve plate 63 received between rail halves 68, 69 are combined to a mounting unit 91 by means of a temporary mounting safeguard 87 which has three bolt connections 88 in this instance which brace rail halves 68, 69 against slide valve plate 63 disposed therebetween, as illustrated in FIGS. 12 and 13. Only after mounting safeguard 87 has been inserted are clamp connections 79, 80 between rail halves 68, 69 and casing parts 76, 77 as well as a coupling 94 realized between rotary drive 65 and slider plate valve 63 released. Subsequently, mounting unit 91, which is connected via an actuator 89 to a mounting rail 91 disposed at a slide valve casing 78, can be removed from slide valve casing 78 radially to a flow axis 95 of slide valve 25 in a load-relieving manner for the technician.

[0047] As can be seen in particular in FIGS. 9 to 11, slide valve casing 78 of slide valve 25 is provided with a packed valve 92 for being connected to measuring probe 24 illustrated in FIG. 2, said packed valve 92 enabling a variable entrance angle of measuring probe 24 into blast furnace 21 via a compensator 93 via the disposition formed by packed valve 92 and slide valve 25. As FIG. 1 illustrates, a corresponding disposition is also intended for slide valve 20.

[0048] The above makes clear that slide valve rails 29 or 67 provided with seal elements 33, 34 or 70, 71 can be exchanged at slide valve 20 and at slide valve 25 not only by maintaining the installed position of slide valve 20, 25 at blast furnace 22 but also by in particular a separation of slide valve casing 26, 78 of slide valve 20, 25 from connected components, such as in particular the packed valves 92 each connected to slide valve casing 26, 78 via compensator 93, not being required.