FI92501C - Structure associated with the paper machine headbox manifold feed pipe - Google Patents

Description

92501

Structure of the paper machine headbox manifold related to the core tube

Construction in connection with the mattresses of the floor and in the paper machine 5

The invention relates to a structure related to the feed pipe of a manifold of a paper machine headbox.

10

When tilting the headbox of a paper machine, the feed tube is equipped with device arrangements that allow the feed tube to rotate. It has been known to form the feed tube at least in part from a resilient elastic material which allows the feed tube to rotate while the other end of the elastic structure remains in place. A disadvantage of said structure 15 is the poor durability of the material. When the headbox is tilted, the head associated with the headbox size has moved a larger path while the other end of the feed tube remains in place. The material is subjected to severe tensile stress, which has limited the service life of the pipe.

20 The purpose of this application is to remedy the above problems. The application shows a structure that avoids torsional stresses on the intake pipe. According to the invention, it has been realized to form in the supply pipe such a connecting structure comprising a connecting flange, the central axis of which is parallel and coincident with the geometric axis of rotation of the headbox. The flange connection is thus made into 25 articulated joints, which allows the supply pipe to rotate about the central axis of the flange. When the headbox is turned, the inlet pipe connected to the headbox manifold rotates in a radius R around the geometric central axis of the flange. With the help of said structure, the following have been avoided: the use of flexible connecting pipes.

- - - ΤΓ7. ___ 92501 2

The connecting structure of the paper machine headbox feed pipe according to the invention is mainly characterized in that the central and rotary axes of the connecting flange are substantially the same as the tilt axis of the paper machine headbox.

The invention will now be described with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings, to which, however, the invention is not intended to be exclusively limited.

Figure 1 shows a side view of a paper machine headbox.

10

Figure 2 shows a connecting flange according to the invention in connection with a supply pipe connected to a headbox manifold, seen from the direction of Figure 1.

3 shows a connection flange of the arrow K2 in Figure 2 view.

15

Figure 4 is a side view of the flange structure seen from the direction K3 of Figure 3 and partly in cross-section.

Figure 5 shows on an enlarged scale the area A of Figure 4.

20

Figure 1 shows a side view of a paper machine headbox. Paper machine

. I I

the headbox can be tilted by means of the actuator T. The geometric axis of rotation of the headbox of the paper machine in the lug C is marked in Fig. 1 by the letter Xj. The headbox P of the paper machine is connected to its manifold by a pulp core tube Sj. The supply pipe Si 25 comprises, as a pivot point allowing the pipe St to rotate, a connecting flange 10 with which the supply pipe S! is connected to the inlet pipe S2.

Figure 2 shows an inlet pipe connected to the headbox P and connected to the inlet pipe S2 by a flange connection 10 allowing the pipe St to rotate. The geometric center and rotation axis X} of the connecting flange 10 is the same as the tilt axis X2 of the headbox of the paper machine. The axis Xt of the flange connection thus coincides with the tilt axis X2 of the headbox.

92501 3

When the inlet pipe S! is connected to the headbox P, the portion S adjacent to the headbox P of the supply pipe is located and at a distance R from the central and rotary axis Xj of the connecting flange 10. When the headbox P is tilted, the pipe section S moves around the axis X2 and around the axis Xj in the radius R, the connecting flange 10 allowing a hydrogenation movement. Arrow Lj indicates 5 pulp flow directions.

3 shows a liitoslaipparakenne the direction of arrow 10 of Figure 2 from the direction K2. The connecting flange 10 comprises a connecting collar 11 which is adapted to be openable and which is adapted to be double-sided comprising collar halves 12a, 12b which are articulated to each other 10 by means of a joint 13. The connecting collar 11, its collar halves 12a, 12b are connected by means of a screw 14 through the lugs 15a, 15b in the collar portions.

Figure 4 shows the flange of the arrow K2 in Figure 3 and partly in section of a sivultapåin. Figure 5 shows the area A of Figure 4 on an enlarged scale. The tube portion Sj is associated with a shoulder flow orifice end portion Sj 'and the tube portion S2 is associated with a shoulder flow orifice end portion S2', respectively. The side surfaces Ej and E of the shoulder end portions Sj ', S2'? are at an oblique angle to the direction of the radius Rj of the joint, so that by rotating the screw 14 the force with which the tubes Sj, S? pressed against each other. The tightening force is selected so as to allow the tube S1 to rotate relative to the tube S2. The side surfaces act as wedges. with the side surfaces U1 and U2 of the groove 11 of the collar. The connecting collar 11 comprises a cross-sectional shape of the groove U corresponding to the appearance of the shoulders Sj \ S2 '. By connecting the halves 12a, 12b of the collar 11 to each other with a screw 14, the pipe parts S1, S2 to be connected are pressed against each other and held together. However, the connection allows the pipe section Sj 25 to rotate.

The pipe Sj provided with the end shoulder Sj 'comprises on the end face Nj of the shoulder Sj' a groove V to which the pipe part S? the shoulder end S2 'is adjustable so that the end shoulder D on the end face N2 of the shoulder end rests in the groove V.

30

Claims (5)

A construction adjacent to the pulp feed tube in the distribution bar of an inlet box of a paper machine, in which the construction pulp feed tube (S,) comprises a connection flange (10) between the feed tube (Sj) and the input tube (S2), and the connection flange ( 10) comprises a structure adjacent to the supply pipe (Sj) which is arranged to be rotated in relation to the structure (S2 ') which joins the input pipe (S2) of the connecting flange (10) when leaning on the inlet box (P), characterized accordingly , that the central and rotational axis 10 (Xj) of the connecting flange (10) is substantially the same as the inclination axis (X2) of the paper machine's inlet box (P). 2. A construction according to claim 1, characterized in that the connecting flange (10) comprises a spirit portion (Sj ') with stop in connection with the feeding tube (S2) and a spirit portion (S2') with a stop in connection with the input tube (S2), the stops (Sj \ S2 ') are joined by a connecting band (11) which includes a groove (U) and a cross-sectional shape therein that matches the stop shapes (S1', S2 ') · 3. A construction according to claim 2, characterized in that the connecting band (11) comprises band halves (12a, 12b) which are joined together with a screw (14), whereby the force of the tensioning force of the screw (14) is controlled by that force. with which the stops (Sj \ S2 ') are pressed against each other while the tension is, however, such that a rotation of the feeding tube (Sj) about the central and rotational axis (Xj) is allowed. 4. Connecting structure according to any one of the preceding claims, characterized in that the side surfaces (Ej ^) of the spirit parts (S1 ', S2') with abutments are inclined at an angle to the direction of the radius of the connection (Rj), whereby by turning the screw ( 14) can control the force by which the rudders (Sj, S9) are pressed against each other while the side surfaces (E1, E2) of the stops (S1 ', S2') operate through a wedge effect together with the cross-sectional shape of the groove (U) of the connecting band. . 92501 5. A construction according to any one of the preceding claims, characterized in that the rudder (Sj), its spirit stop (Sf) comprises a groove (V) on its front surface (Nj), in which the stop (S7 ') of the rudder part (S?) which is to be connected to the groove can be adjusted in such a way that the front surface stop (D) on the front surface (N2) of the stop spirit (S2) enters the groove (V).