DE10105390C1 - Plate-type slide valve has carrier frame with arc sector joining two parallel arms and spindle bearing at end of arms - Google Patents

Abstract

The valve (1) has a U-shaped carrier frame (3) with an arc sector (5) joining two parallel arms (4). Coupling plates (39) lie alongside the arc sector. They have co-axial receiving apertures for positive positioning of two sealing bodies (15) with two receiving grooves (13) in which there are two co-axial through apertures (14) for the carrier frame.

Description

The invention relates to a knife gate valve for detachable installation in a in particular, conduit containing liquids containing solids strand.

Included in the brochure ERU Knife Gate Valve K1 from Erhard GmbH & Co., Heidenheim (publication no. 233 RH XI / 95) includes a knife gate valve State of the art, which is a two-part, circumferentially together Human screw housing made of cast iron. In the two plates Like housing parts are approximately oval openings for the Liquid provided. These through openings also extend into annular end flanges as integral parts of the Ge housing parts, which serve to connect to pipe strings. To do this special sealing rings are required at the front of the flanges.

The vertical edge areas of the oval passage openings serve with the lateral guidance of a U-shaped slide plate in its outer contour, the  assigned between the two housing parts in the housing parts Neten independent seals is performed.

Above the upper arcuate areas of the through openings are with their legs facing each other, extending transversely U-shaped Sealing strips and guide tapes made of PTFE bronze are provided, which get to the system on the two flat sides of the slide plate. The Sealing strips are placed over the guide tapes with the help of pressure pieces pressed against the flat sides of the slide plate. The thrust pieces are from above into the gap between the housing parts and the slide plate set and pressed against the sealing strips by screws. The dense strips support themselves on the inner longitudinal brackets of the housing divide.

A second egg is located at a distance from the upper sides of the housing parts nig spindle bearing. The spindle bearing is supported by four stud bolts Housing parts coupled. Two studs are attached to one housing part assigns. On a housing part and off-center of the spindle bearing a threaded spindle stretches. A spindle nut runs on the thread ter that on the upper longitudinal edge on a flat side of the slide plate is attached. The lower end of the spindle is in a side console of a housing part rotatably supported, while the upper end of a collar has the axially between the two parts of the spindle bearing is slidable, but rotatably clamped.

The known design consequently has several inside and outside you that are made for themselves and kept ready accordingly have to. It is also necessary to use these seals one after the other Installation of the knife gate valve. Furthermore, a variety of bolts and nuts necessary to fit the housing parts together to connect the and the spindle bearing with the housing parts. Further  additional pressure pieces are required for the sealing strips, which are also must be fixed to the housing parts with screws.

The invention is based on the prior art - the task based on a knife gate valve for detachable installation in one, in particular liquids containing solids lead to the wiring harness create that is more economical to manufacture, easier to assemble and safer can be driven.

This object is achieved according to the invention in the features of claim 1.

Such a knife gate valve has a support, so to speak, as a supporting framework frame, which is divided from a board and then bent into a U-shape. This support frame thus has an arch section and two the Bo parallel leg connecting parallel section. The thighs in turn wear a spindle bearing. The support frame can, depending on the current application (food industry, breweries, chemical in industry, sugar industry etc.) as well as the prevailing in this application Liquid pressures from the appropriate materials, such as for example steel, stainless steel, aluminum or plastic, especially fiber reinforced plastic.

The arch section and the lengths adjacent to the arch section sections of the legs of the support frame are in a U-shaped receptacle grooves of two mirror images, identically trained deten and provided with openings for the liquid sealing body embedded in a limited elastic plastic. These areas of the support frame are completely of the material after assembly the sealing body enclosed.

The sealing bodies are made of two parallel cups fixation plates with coaxial receiving openings fixed in position. These clutch plates  consist appropriately of the material from which the Tragrah men is made.

The cohesion of the support frame, sealing body and coupling plates is guaranteed by two clamping yokes, which extend along that of the spindle position tion facing outer surfaces of the clutch plates. The For example, clamping yokes can comprise the coupling plates U-shaped clamps with flanges angled at the ends by 90 ° stand, which can be screwed together and thus a flawless Bracing of the coupling plates, the sealing body and the support frame guarantee. Preferably, the inner long sides of the clamping bracket be convexly curved between her legs to create a tilt-free tensioning with perfect guidance of the slide plate ensure in both directions.

With the help of a threaded spindle parallel to the legs of the Tragrah mens shiftable, with regard to their outer contour U-shaped slide plate extends between the two sealing bodies and is exclusively from led the two sealing bodies. The slide is also in the closed position top plate with its peripheral edge sections only on the sealing body pern. This ensures that the knife gate in both Directions can also be easily flowed through by liquids that have an almost pasty state.

Since both the support frame and the coupling plates from the sealing body pern are at least partially enclosed, not only form the sealing body a perfect sealing guide for the slide plate, but also At the same time, seals on the In tegration of the knife gate valve in a wiring harness, especially in a pipe string.

Accordingly, there are only two in the context of the invention and also identical trained sealing body required to seal on one side  ensure the slide plate in all positions and on the other hand integrate the knife gate valve tightly into a wiring harness can.

The manufacturing and assembly effort is consequently low. The reliable unit is high.

An advantageous embodiment of the invention is in the features of Claim 2 sees. After that, the slide plate is at its parallel Longitudinal edges and the front of their Bogenbe connecting the long edges richly provided with V-shaped bevels. According to this design of the The slide plate is then between the sealing bodies pressed together a U-shaped contoured to the cross-section of the slide plate Recording area designed for the slide plate. Thereby lies the Slide plate in the closed position of the plate slide in the area of Limit passage openings with their circumference of the arch area the chamfers on corresponding inclined surfaces of the sealing body, while those lying next to the passage openings are generally rectangular formed areas of the slide plate both flat on corresponding surfaces Chen the sealing body as well as with respect to their chamfers on the longitudinal edges rest against these adapted inclined surfaces of the sealing body.

Such training not only provides a perfect seal against above the respective liquids, but also allows a perfect free displacement of the slide plate without this - even at high Pressing the fluids - great forces have to be applied.

On the one hand, especially when the slide plate is moved, the Safely remove contaminants adhering to their flat sides and around on the other hand, to be able to create an additional sealing effect, are the front of the flat sides of the slide plate according to claim 3 opposite contact surfaces of the sealing body approximately in the height range the clamping yokes with themselves transversely to the direction of displacement of the slide plate  extending wipers. The pressure effect of the wipers and so that their cleaning effect can be set specifically via the clamping yokes become.

A further improvement of the wipers in connection with an additional Lichen density effect is seen in the features of claim 4. Then there are two oppositely arranged on each sealing body, each in one Effective scraper displacement in the distance from each other see. These wipers ensure that both from the outside and from inside and adhering to the flat sides of the slide plates Impurities can be removed without the proper sealing as well to impair the safe guidance of the slide plate.

The note shows a particularly advantageous embodiment of the wipers male of claim 5 before. Then the wipers are through in Material of the sealing body embedded in opposite directions about their longitudinal axes twisted polygonal rods formed. It is preferably square rods made of brass. The edges of the square bars then slide as scrapers on the flat sides of the slide plate. Your far to the scraper edges limited resilient embedding in the sealing body increases their Functionality.

To further improve the wiping effect and also for support the sealing effect according to claim 6 in the height range between the passage openings in the sealing bodies and the passage openings towards the adjacent wipers, which run parallel to the wipers strips embedded in the transverse grooves formed in the sealing bodies.

According to the features of claim 7, these scraper can preferably formed from at least limited elastic plastic tubes his.  

Due to the features of claim 8, the passage opening a double-conical design in the sealing bodies. hereby is not just a uniform flow behavior in both flows directions guaranteed, but it is also comparatively small According to the material used in the contact of the sealing body with the slide plate Overall sealing behavior improved.

The front sealing flanges are integral parts of the sealing body, so that when integrating the knife gate valve according to the invention in no additional seals are used in a cable harness have to.

According to the features of claim 9 are between the Sealing flanges and the sealing bodies circumferential grooves for storing the Receiving openings in the marginal areas delimiting the coupling plates intended. The edge areas seal into the circumferential grooves. The In this way, clutch plates form stabilizing elements for the Sealing body.

To improve the sealing behavior when integrating the plate slide bers in a wiring harness are the end faces according to claim 10 the sealing flanges each with several concentrically assigned to each other Equipped with sealing ribs.

The improved dense layout of the areas facing each other the sealing body next to the grooves for the support frame serve the parallel to the receiving grooves sealing ribs on the forehead surfaces of the sealing body according to claim 11.

The legs of the support frame are according to claim 12 in the Höhenbe rich between the sealing bodies or the clutch plates on the one hand and the spindle bearing, on the other hand, wider than in the height range of the sealing body trained by or the clutch plates. In addition, the narrow ones  Leg sections laterally offset from the wide leg sections. On in this way the immediate sealing area of the knife gate valve can be with respect to the vertical central longitudinal plane of the slide plate on both sides be trained identically. Nevertheless, it is ensured that the spindle arranged centrally between the wide leg sections and also is embedded centrally in the spindle bearing.

To attach the spindle bearing to the support frame are accordingly Claim 13 the free ends of the legs of the support frame angled flange-like and facing each other frontally. Then it is enough z. B. four comparatively short bolts, not only the spindle position fixation on the flange-like ends of the legs, but also a sliding or rolling bearing in the spindle bearing bring.

The staggered arrangement of the narrow and wide lengths of the Leg of the support frame allows it according to claim 14, laterally of the end region facing away from the curved section of the slide plate Attach the spindle nut to the slide plate. This spindle nut is then centered between the wide lengths of the legs assigns. They are preferably attached to the slide plate by two Screws.

The fixing tubes molded onto the curved sections of the coupling plates according to claim 15 serve in addition to the yokes of the flawless Tensioning the sealing body while ensuring the sealing function in the even easier displacement of the slide plate without significant force effort in both directions, regardless of the respective liquid pressures. For fixation are through the holes of the fixation ears, bolts and the fixation ears with nuts pulled against each other.  

Another embodiment of a knife gate valve is in the features of claim 16 characterized. Here are the clutch plates in the height range between the clamping yokes and the receiving openings with threaded sleeves, which are in the recesses of the sealing body and Extend coaxially to holes in the clutch plates. The threaded sleeve sen can consist, for example, of nuts, which, in particular, by Welding, on the flat sides of the coupling facing each other plates are attached.

Because of these threaded sleeves can also on the knife gate valve bordering pipe sections with flanges with the coupling be connected.

The invention is illustrated below with reference to the drawings clear embodiments explained in more detail. Show it:

Figure 1 is a knife gate valve in the front view.

Figure 2 is seen a vertical longitudinal section through the representation of Figure 1 along the line II-II in the direction of arrows IIa.

Fig. 3 on an enlarged scale the section III of Fig. 2;

Figure 4 is a perspective view of a support frame of the plate slide of Figures 1 and 2.

Fig. 5 is a front view of the sealing face of a sealing body of the slider plate of Figures 1 and 2; FIG.

FIG. 6 is an end view of the representation of FIG. 5 seen in the direction of arrow VI;

Fig. 7 is a front view of a clutch plate of the plate slide bers of Figures 1 and 2.

Fig. 8 is a front view of a slide plate of the plate slide bers of Figures 1 and 2.

Fig. 9 is a plan view of the knife gate valve of Fig. 8 seen in the direction of arrow IX and

Fig. 10 is a perspective view of two clamping yokes for the slide plate of Fig. 1 and 2.

In Figs. 1 and 2, a slide plate is generally for releasably mounting in a illustrated in dot-dash lines Lei tung strand 2 are indicated by 1.

The knife gate valve 1 has a support frame 3 made of steel, which, as shown in FIG. 4 can be seen in more detail, divided from a board, for example punched ge, and then bent into a U-shape. The support frame 3 is composed of two legs 4 and an arch section 5 connecting the legs 4 . The legs 4 have two different width Längenab sections 6 , 7 . While the adjoining the arc portion 5 length portions 6 have the same width as the arc portion 5, the longitudinal sections facing away from the arc portion 5 are 7 forms a wider area. In addition, the arc portion 5 adjacent Längenab are sections 6 to the end wider longitudinal sections 7 are arranged laterally offset.

The free ends 8 of the legs 4 are angled like a flange by 90 ° and face one another lying in one plane. In the free ends 8 holes 9 are provided, which serve to define a two bearing plates 10 , 11 existing spindle bearing 12 ( Fig. 1, 2 and 4).

The curved section 5 and the adjoining longitudinal sections 6 of the legs 4 of the supporting frame 3 are embedded in receiving grooves 13 of two identically designed sealing bodies 15 which are assigned to one another in mirror image, and are provided with coaxial through openings 14 and are made of a limited elastic plastic ( FIGS. 1 to 3, 5 and 6). The sealing body 15 lie with their U-shaped grooves 13 adjacent beard end faces 16 to each other ( Fig. 2 and 3). In addition, sealing ribs 17 running parallel to the receiving grooves 13 are provided on these end faces 16 ( FIG. 5).

The sealing body 15 have an overall U-shaped contour ( FIG. 5). The surfaces 18 between the passage openings 14 and the end faces 20 facing away from the arch regions 19 are offset parallel to the end surfaces 16 ( FIG. 6). These surfaces 18 for contacting a slide plate 21 recognizable from FIGS. 1 to 3, 8 and 9 are since Lich and the openings 14 circumferentially limited by U-shaped duri fende inclined surfaces 22 , which on the V-shaped chamfers 23 on the circumferential side of the slide plate 21 are adapted ( Fig. 1, 2, 5, 6, 8 and 9). Through the surfaces 18 and the inclined surfaces 22 towards the end faces 16 , an overall U-shaped receiving area 24 for the slide plate 21 is created between two sealing bodies 15 ( FIG. 6).

Adjacent to the passage openings 14 are transverse grooves 25 formed in the surfaces 18 (see in particular Fig. 3), in which pre-wipers 26 are embedded in the form of at least limited elastic plastic tubes. The mutually facing circumferential regions of these preliminary wipers 26 would protrude slightly from the surfaces 18 if no slide plate 21 were used.

In the height range between the preliminary wipers 26 and the end faces 20 of the sealing body 15 (FIGS . 1 to 3 and 5), two wipers 27 are arranged in opposite directions, each effective in one direction of displacement (see in particular FIG. 3). These wipers 27 consist of polygonal rods rotated in opposite directions about their longitudinal axes in the form of square rods made of brass. Their edges 29 , which come to rest on the flat sides 28 of the slide plate 21 , lie adjacent to lips 30 formed from the material of the sealing body 15 . The areas 31 between the lips 30 of each sealing body 15 are slightly concavely curved. They are therefore not in contact with the flat sides 28 of the slide plate 21 . The areas 32 of the sealing bodies 15 above and below the wipers 27 are excluded from the surfaces 18 , so that they likewise do not come into contact with the slide plate 21 .

From FIGS. 1 and 3 can also be seen that the respective largest diameter of the conical openings 14 located in the seal bodies 15 in a plane in which the end face 33 a with each sealing body 15 integrally connected annular sealing flange 34 he stretches. The end faces 33 of the sealing flanges 34 have a plurality of sealing ribs 35 which are assigned to one another concentrically ( FIG. 6).

Between the sealing flanges 34 and the sealing bodies 15 are circumferential grooves 36 for mounting the edge regions 37 of the through-openings 14 coaxial receiving openings 38 also made of steel, the coupling plates 39 are provided ( Fig. 1 to 3 and 7). The hitch be plates 39 are rectangular in the height region 40 above the sealing flanges 34 , while they have an annular contour in the region 41 of the sealing flanges 34 . On the rectangular area 40 facing away from the circumference 42 of the annular area 41 obliquely protruding fixation tubes 43 with holes 44 are integrally formed.

Adjacent to the receiving openings 38 are 39 threaded sleeves 46 in the form of nuts welded to the mutually facing flat sides 45 of the coupling plates ( Fig. 1 to 3, 5, 6 and 7). These threaded sleeves 46 engage in recesses 47 of the sealing body 15 and are aligned coaxially to 48 holes in the coupling plates 39 .

Approximately in the height range of the wipers 27 on the inside of the sealing body 15 , transversely extending outer clamping yokes 49, which can be seen in FIGS . 1 to 3 and 10, are provided. The clamping yokes 49 have a U-shaped clamp 50 having two legs 51, the legs 51 ver binding ridge 52, and bent from the legs 51 to 90 ° Flan-specific 53 respectively. Bores 54 are provided in the flanges 53 , through which screw bolts are inserted. The mutually facing inner sides 55 of the web 52 are slightly convex.

With the help of the clamping yokes 49 and the bores 54 in the flanges 59 penetrating bolts and nuts, the coupling plates 39 and the sealing body 15 can thus be braced in a targeted manner, on the one hand to enable the slide plate 21 to be properly shifted into both displacement directions and on the other hand to ensure a perfect sealing behavior when the chamfers 23 of the slide plate 21 lie on the inclined surfaces 22 of the sealing body 15 . Fer ner should be the bracing so that both the preliminary wipers 26 and the wipers 27 can perform their function properly.

In addition to the clamping yokes 49 , as can be seen in FIG. 2, additional bolts 56 with nuts 57 can be inserted over the fixing tubes 43 in order to clamp the coupling plates 39 and the sealing body 15 together in the desired extent in this lower circumferential area ,

In the closed position of the slide valve 1 according to FIGS. 1 to 3 over the upper end faces 20 of the sealing body 15 projecting edge region of the slide plate 21 , two bores 58 are provided ( FIGS. 1 to 3, 8 and 9), via which and suitable Bolt 59 a spindle nut 60 is releasably attached to the slide plate 21 . The spindle nut 60 is penetrated by a threaded spindle 61 which is rotatable in the spindle bearing 12 via an axial roller bearing 62 only indicated in FIGS . 1 and 2, but is axially immovable.

On the on the spindle bearing 12 upwardly projecting free end 63 of the threaded spindle 61, a hand wheel is pushed 64 and fixed in position.

As bar from FIGS. 1 to 3 still recognizable in dash-dotted lines, line sections 65 may be of the cable portion 2 with Radialflan rule 66 directly to the end faces 33 of the sealing flange 34 adjacent the one hand, on the clutch plates 39 associated threaded sleeves 46 and on the other hand on the Fixierohren 43 with the knife gate valve 1 are the.

REFERENCE NUMBERS

1

Knife Gate Valve

2

wiring harness

3

Support frame v.

1

4

Thigh v.

3

5

Arch section v.

3

6

Longitudinal section v.

4

7

Longitudinal section v.

4

8th

free ends of

4

9

Holes in

8th

10

Bearing plate v.

12

11

Bearing plate v.

12

12

spindle bearing

13

Grooves in

15

14

Openings in

15

15

Sealing body v.

1

16

End faces v.

15

17

Sealing ribs on

16

18

Areas of

15

19

Arch areas v.

15

20

End faces v.

15

21

slide plate

22

Inclined surfaces

18

u.

14

23

Chamfer

21

24

reception area

25

Transverse grooves in

18

26

Scraper in

25

27

scraper

28

Flat pages

21

29

Edges of

27

30

Lips on

15

31

Areas between

30

32

Areas between

30

33

End faces v.

34

34

Sealing flanges v.

15

35

Sealing ribs on

33

36

circumferential grooves

37

Marginal areas v.

38

38

Receiving openings v.

39

39

clutch plates

40

Rectangular area v.

39

41

circular area v.

39

42

Scope of

41

43

Fixation ears

39

44

Holes in

43

45

flat sides

46

Threaded sleeves

45

47

Deepening in

15

48

Holes in

39

49

clamping yokes

50

Clamping bracket v.

49

51

Thigh v.

56

52

Web between

51

53

Flanges from

50

54

Holes in

53

55

Inside of v.

52

56

bolts

57

nuts

58

Holes in

21

59

bolts

60

spindle nut

61

screw

62

thrust roller bearing

63

free end of

61

64

handwheel

65

Line sections v.

2

66

Radial flanges on

65

Claims (16)

1. Knife gate valve ( 1 ) for detachable installation in a conduit ( 2 ) carrying liquids, in particular solids,

• a) which has a support frame ( 3 ) which is divided from a circuit board and then bent into a U-shape and has a curved section ( 5 ) connecting two parallel legs ( 4 ) and a spindle bearing ( 12 ) provided at the ends of the legs ( 4 ),
• b) which two coupling plates ( 39 ), which extend on both sides next to the curved section ( 5 ) and the adjoining longitudinal sections ( 6 ) of the legs ( 4 ) in parallel alignment, with co-axial receiving openings ( 38 ) for the form-fitting positional fixation of two mirror images assigned to one another, identically trained and with the receiving openings ( 38 ) coaxial through openings ( 14 ) for the liquid and frontally opposed U-shaped receiving grooves ( 13 ) for the support frame ( 3 ) provided with sealing bodies ( 15 ) made of a limited elastic plastic .
• c) which two the spindle bearing ( 12 ) facing areas ( 40 , 18 ) of the coupling plates ( 39 ) and the sealing body ( 15 ) with embedding of the curved section ( 5 ) and the adjacent Län genabschnitte ( 6 ) of the legs ( 4 ) in the Includes grooves ( 13 ) against each other pressing clamping yokes ( 49 ), and
• d) which has a slide plate ( 21 ) which is arranged between the two sealing bodies ( 15 ) and guided by them and which is U-shaped with respect to their outer contour and which is detachably coupled to a spindle ( 61 ) passing through the spindle bearing ( 12 ).

2. Knife gate valve according to claim 1, in which the slide plate ( 21 ) has V-shaped bevels ( 23 ) on its parallel longitudinal edges and the end face of its arc region connecting the longitudinal edges and between the sealing bodies ( 15 ) pressed against one another to the cross section of the slide plate ( 21 ) adapted U-shaped contoured receiving area ( 24 ) for the slide plate ( 21 ). 3. Knife gate valve according to claim 1 or 2, in which the flat sides ( 28 ) of the slide plate ( 21 ) face to face ( 18 ) of the sealing body ( 15 ) approximately in the height range of the clamping yokes ( 49 ) with itself transverse to the direction of displacement of the slide plate ( 21 ) extending wipers ( 27 ) are provided. 4. Knife gate valve according to claim 3, in which on each sealing body by ( 15 ) two oppositely arranged, each effective in one direction of scraper ( 27 ) are provided. 5. Knife gate valve according to claim 3 or 4, in which the Abstrei fer ( 27 ) are formed by in the material of the sealing body ( 15 ) embedded around their longitudinal axes twisted polygonal rods. 6. Knife gate valve according to one of the claims 3 to 5, in which in the height range between the through openings ( 14 ) in the sealing bodies ( 15 ) and the through openings ( 14 ) from adjacent scraper ( 27 ) parallel to the wipers ( 27 ) extending scraper ( 26 ) are embedded in transverse grooves ( 25 ) formed in the sealing bodies ( 15 ). 7. Knife gate valve according to claim 6, in which the preliminary wipers ( 26 ) are formed from at least limited elastic plastic tubes. 8. Knife gate valve according to one of claims 1 to 7, in which the through openings ( 14 ) in the sealing bodies ( 15 ) are conical, the largest diameter in each case lying in a plane in which the end face ( 33 ) of each sealing body ( 15 ) an integrally connected annular sealing flange ( 34 ) extends. 9. Knife gate valve according to claim 8, in which between the sealing flanges ( 34 ) and the sealing bodies ( 15 ) circumferential grooves ( 36 ) for mounting the receiving openings ( 38 ) in the coupling plates ( 39 ) delimiting edge regions ( 37 ) are provided. 10. Knife gate valve according to claim 8 or 9, in which the end surfaces ( 33 ) of the sealing flanges ( 34 ) have a plurality of concentrically assigned sealing ribs ( 35 ). 11. Knife gate valve according to one of claims 1 to 10, in which on the mutually facing end faces ( 16 ) of the sealing body ( 15 ) parallel to the receiving grooves ( 13 ) extending sealing ribs ( 17 ) are provided. 12. Knife gate valve according to one of claims 1 to 11, in which the legs ( 4 ) of the support frame ( 3 ) in the height range between the sealing bodies ( 15 ) or the coupling plates ( 39 ) on the one hand and the spindle bearing ( 12 ) on the other hand wider than in the height range the sealing body ( 15 ) or the coupling plates ( 39 ) are formed. 13. Knife gate valve according to one of claims 1 to 12, in which the free ends ( 8 ) of the legs ( 4 ) of the support frame ( 3 ) for releasable fixing of the spindle bearing ( 12 ) are angled like a flange and face each other frontally. 14. Knife gate valve according to one of claims 1 to 13, in which in the end of the arc section of the slide plate ( 21 ) facing away from a spindle nut ( 60 ) is attached to the slide plate ( 21 ). 15. Knife gate valve according to one of claims 1 to 14, in which on the annular regions ( 37 ) of the coupling plates ( 39 ) fixing ears ( 43 ) are formed. 16. Knife gate valve according to one of the claims 1 to 15, in which the coupling plates ( 39 ) in the height range between the clamping yokes ( 49 ) and the receiving openings ( 38 ) are provided with threaded sleeves ( 46 ) which are located in depressions ( 47 ) of the sealing body ( 15 ) and extend coaxially to bores ( 48 ) in the coupling plates ( 39 ).