초록 ▼

The present invention relates to a pressure vessel (1) for a high pressure press comprising at least a first sub-cylinder (4) and a second sub-cylinder (6), which are axially connected to form a cylinder body (2) for enclosing a high pressure medium, and a sealing arrangement arranged at the inner w

The present invention relates to a pressure vessel (1) for a high pressure press comprising at least a first sub-cylinder (4) and a second sub-cylinder (6), which are axially connected to form a cylinder body (2) for enclosing a high pressure medium, and a sealing arrangement arranged at the inner wall of the cylinder body for sealing the joint (3) between the first and the second sub-cylinder (4, 6) against leakage of the pressure medium. The sealing arrangement is comprising a ring shaped sealing band (18), a first circumferential protruding flange (30), which is arranged on the inner wall of the first sub-cylinder and which axially extends from the joint (3) and away from the second sub-cylinder (6), and a second circumferential protruding flange (32), which is arranged on the inner wall of the second sub cylinder (6) and which axially extends from the joint (3) and away from the first sub-cylinder (4). The sealing band (18), in mounted position, is located concentrically within the first and the second protruding flanges (30, 32) such that it in a radially pre-stressed manner abuts against the first and second protruding flanges (30, 32) and sealingly overlaps the joint (3) between the first and the second sub-cylinder (4, 6). The sealing arrangement further comprises a first circumferential mounting space (51), which is arranged in the inner wall of the first sub-cylinder (4) and which axially extends from the first protruding flange (30) and away from the second sub-cylinder (6), for facilitating exchange of components of the sealing arrangement.

대표청구항 ▼

1. A pressure vessel for a high pressure press comprising at least a first sub-cylinder and a second sub-cylinder, which are axially connected to form a cylinder body for enclosing a high pressure medium, a sealing arrangement arranged at the inner wall of the cylinder body for sealing the joint bet

1. A pressure vessel for a high pressure press comprising at least a first sub-cylinder and a second sub-cylinder, which are axially connected to form a cylinder body for enclosing a high pressure medium, a sealing arrangement arranged at the inner wall of the cylinder body for sealing the joint between the first and the second sub-cylinder against leakage of the high pressure medium, the sealing arrangement comprising a ring shaped sealing band, a first circumferential protruding flange, which is arranged on the inner wall of the first sub-cylinder and which axially extends from the joint and away from the second sub-cylinder, a second circumferential protruding flange, which is arranged on the inner wall of the second sub-cylinder and which axially extends from the joint and away from the first sub-cylinder; wherein the sealing band, in mounted position, is located concentrically within the first and the second protruding flanges such that it in a radially pre-stressed manner abuts against the first and second protruding flanges and sealingly overlaps the joint between the first and the second sub-cylinder, and wherein the sealing arrangement further comprises a first circumferential mounting space, which is arranged in the inner wall of the first sub-cylinder and which axially extends from the first protruding flange and away from the second sub-cylinder, for facilitating exchange of components of the sealing arrangement. 2. The pressure vessel for a high pressure press according to claim 1, wherein the protruding flanges protrude such a radial distance in the radial direction, and the sealing band has such an outer diameter in an unstressed state, that the sealing band, in mounted position, is radially pre-stressed by being elastically compressed and a contact pressure between the sealing band and the protruding flanges is at least 2 MPa. 3. The pressure vessel for a high pressure press according to claim 1, wherein the protruding sealing flanges have a circumferential, sealing contact surface, respectively, for sealingly contacting a corresponding sealing surface on the sealing band, and wherein the contact surfaces axially extends in parallel with central axis of the cylinder body. 4. The pressure vessel for a high pressure press according to claim 1, wherein the sealing band has a circumferential edge which is provided with a beveled edge. 5. The pressure vessel for a high pressure press according to claim 1, wherein the sealing band is made of a metallic material. 6. The pressure vessel for a high pressure press according to claim 1, wherein the first mounting space is such dimensioned that, when the sealing band is in a pre-mounted position, it is located in the first mounting space. 7. The pressure vessel for a high pressure press according to claim 1, wherein the sealing band, in mounted position, has a circumferential portion axially extending past the first protruding flange and over a portion of the first mounting space such that a circumferential sealing channel is formed between the sealing band, a radial surface of the first protruding flange and the inner wall of the first sub-cylinder; and wherein the sealing arrangement further comprises a circumferential auxiliary sealing arrangement, which is arranged in the sealing channel for sealing the joint between the sealing band and the first protruding flange. 8. The pressure vessel for a high pressure press according to claim 7, wherein the first mounting space has such an axial extension that access to the sealing channel from within the cylinder body for replacement of at least components of the auxiliary sealing arrangement is enabled. 9. The pressure vessel for a high pressure press according to claim 7, wherein the auxiliary sealing arrangement comprises a soft seal. 10. The pressure vessel for a high pressure press according to claim 1, wherein the sealing arrangement further comprising a locking member arranged in the first mounting space for preventing axial movement of the sealing arrangement in mounted position. 11. The pressure vessel for a high pressure press according to claim 10, wherein the first mounting space is formed by a circumferential mounting groove in the inner wall of the first sub-cylinder, the radial thickness of the locking member is equal to the combined radial thickness of the first protruding flange and the sealing band, and wherein the locking member axially extends from an circumferential edge of the sealing band to the distal end of the mounting groove, whereby the radial inner surfaces of the sealing band, the locking member and the inner surface of the cylinder body outside the mounting groove are flush. 12. The pressure vessel for a high pressure press according to claim 10, wherein the locking member is a circlip. 13. The pressure vessel for a high pressure press according to claim 1, wherein the sealing arrangement further comprises a second circumferential mounting space, which is arranged in the inner wall of the second sub-cylinder, axially extends from the second protruding flange and away from the first sub-cylinder, and which is arranged as the first circumferential mounting space and cooperates with corresponding features of the sealing arrangement as the first circumferential mounting space. 14. The pressure vessel for a high pressure press according to claim 13, wherein the sealing arrangement is symmetrical over the joint between the first and second sub-cylinders. 15. The pressure vessel for a high pressure press according to claim 1, wherein the pressure vessel further comprising pre-stressing means provided around the envelop surface of the cylinder body such that the cylinder body is radially pre-stressed. 16. The pressure vessel for a high pressure press according to claim 15, wherein the first sub-cylinder and the second sub-cylinder are axially connected by a securing member, wherein the first sub-cylinder is provided with a first seat for receiving a first part of the securing member, the second sub-cylinder is provided with a second seat for receiving a second part of the securing member, the securing member is fitted in the first and second seats, the securing member, and the first and second seats are arranged such that the securing member, and the first and second seats cooperate to prevent relative axial movement between the first and the second sub-cylinders, and wherein the pre-stressing means is provided around the envelop surface of the cylinder body such that the cylinder body is radially pre-stressed and such that the securing member is locked in the first and second seats. 17. A method for replacing a worn sealing band of a pressure vessel according to claim 1, comprising the steps of removing a worn sealing band out of the pressure vessel, inserting a tool having a wedge surface into the first mounting space such that the wedge surface forms a sliding surface axially at least along a distance between a bottom of the first mounting space and an innermost radial end of the first protruding flange, and at least at selected circumferential portions, deforming a circular replacement sealing band into an oval-like shape, introducing the deformed replacement sealing band into the pressure vessel, placing the deformed replacement sealing band in the first mounting space, deforming, in the first mounting space, the deformed replacement sealing band back to substantially the original circular shape thereof, and a step of pushing the replacement sealing band over the wedge-surface of the tool into a sealing position concentrically within the first and the second protruding flanges such that the sealing band in a radially pre-stressed manner abuts against the first and second protruding flanges and sealingly overlaps the joint between the first and the second sub-cylinder. 18. The pressure vessel for a high pressure press according to claim 5, wherein the metallic material is bronze. 19. The pressure vessel for a high pressure press according to claim 6 wherein the sealing band is substantially unstressed in the first mounting space.