Internal pressure self-sealing rotation compensator

Abstract

An internal pressure self-sealing rotary compensator including a fixed tube (1) and a rotatable tube (2), the end of the fixed tube presents a tapered opening, a seal base (3) is connected to the tapered opening end, an inwardly convex rotating base (4) is provided in the inner cavity of the seal base, an annular seal member (5) is attached to the outside of the rotating base, the annular seal member (5) is fixed to the annular seal cavity by a pressing cover (6), an end face self-seal member (7) is attached to the inside of the rotating base, the outer surface of the end face self-seal member abuts against an arc-shaped annular convex surface (8) of the rotatable tube, the outer portion of the arc-shaped annular convex surface smoothly transitions to a first outer conical surface (9) of the end of the rotatable tube, the inner portion of the arc-shaped annular convex surface intersects with the outer surface of the rotatable tube, the first outer conical surface is connected to a second outer conical surface (10), and the taper of the second outer conical surface fits the taper of the tapered opening of the end of the fixed tube. The internal pressure self-sealing rotary compensator has a simple structure and is more convenient to manufacture, which can reduce the performance index of the end face seal member and reduce the production cost.

Description

[Technical field]

[0001] The present invention relates to compensation techniques, and more particularly to an apparatus for length compensation of transportation pipelines, specifically an internal pressure self-sealing rotational compensator. [Background technology]

[0002] At present, the rotary compensator from Chinese patent ZL2006100413011 has been popularized and widely applied, and such compensator can meet the compensation of large diameter and long distance by reasonable combination, and has been applied to various gas-liquid transport pipelines, greatly reducing the cost of piping compensation and improving safety. However, the applicant found that during use, the existing compensator must be combined with a high-pressure resistant seal ring, and the requirements for the sealing performance and pressure resistance of the seal ring are too high, so it is easy to be damaged during use and must be replaced regularly to ensure safe operation. This situation is closely related to the structure of the compensator, so changing the seal structure of the compensator and increasing the cone seal under the premise of retaining the end face seal and ring seal is the key to improving the long-term safe operation of the rotary compensator. Summary of the Invention [Problem to be solved by the invention]

[0003] The purpose of the present invention is to design an internal pressure self-sealing rotary compensator with an increased cone surface, in response to the problem that the traditional rotary compensator is difficult to meet the long-term safe operation with a single end face seal. The cone surface seal can realize the advantage that the higher the pressure, the better the sealing performance. [Means for solving the problem]

[0004] The first technical solution of the present invention is: An internal pressure self-sealing rotary compensator including a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body, the end of the fixed tube 1 presents a tapered opening to form a variable diameter tube, a seal base 3 is connected to the tapered opening end, a rotating base 4 with an inwardly convex shape is provided in the inner cavity of the seal base 3, the inner diameter of the rotating base 4 matches the outer diameter of the rotatable tube 2, an annular seal member 5 is attached to the outside of the rotating base 4, the annular seal member 5 is fixed to an annular seal cavity consisting of the outer end surface of the rotating base 2, the inner surface of the seal base 3 and the rotatable tube 2 by a pressing lid 6, and the pressing lid 6 is fastened by a fastener 1. 2 is connected to the seal base 3, an end face self-sealing member 7 is attached to the inside of the rotating base 4, the outer surface of the end face self-sealing member 7 abuts against an arc-shaped annular convex surface 8 on the rotatable tube 2, the outer portion of the arc-shaped annular convex surface 8 smoothly transitions to a first outer conical surface 9 at the end of the rotatable tube 2, and the inner portion of the arc-shaped annular convex surface 8 intersects with the outer surface of the rotatable tube 2, the taper of the first outer conical surface 9 fits the taper of the inner conical surface at the end of the seal base 3, the first outer conical surface 9 is connected to a second outer conical surface 10, and the taper of the second outer conical surface 10 fits the taper of the tapered opening at the end of the fixed tube 1.

[0005] A conical surface seal structure is formed between the first outer conical surface 9 and the inner conical surface of the seal base 3. The lower arc portion of the arc-shaped annular convex surface, the outer surface of the end face self-sealing member, and the outer surface of the rotatable tube are surrounded by a pressure balancing cavity.

[0006] A self-sealing member 11 is attached to the conical surface seal structure.

[0007] The second technical solution of the present invention is: An internal pressure self-sealing rotary compensator including a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body, the end of the fixed tube 1 presents a tapered opening to form a variable diameter tube, a seal base 3 is connected to the tapered opening end, a rotary base 4 is provided in the inner cavity of the seal base 3, the rotary base 4 is composed of a vertical end face perpendicular to the axis of the rotatable tube 2, an annular surface parallel to the axis, and a conical surface forming an acute angle with the axis, the inner diameter of the annular surface conforming to the outer diameter of the rotatable tube 2, the vertical end face of the rotary base 4 and an inner annular surface connected to the vertical end face and an outer surface of the rotatable tube (2), an annular seal cavity is formed between the annular seal member (5) and the outer surface of the rotatable tube (2), an annular seal cavity is attached to the annular seal member (5) and axial positioning is achieved by a pressure cap (6), the pressure cap (6) is connected to a seal base (3) by a fastener (12), a first outer conical surface (9) is provided at the end of the rotatable tube (2) and a second outer conical surface (10) whose taper matches the taper of the tapered opening at the end of the fixed tube (1) is connected to the first outer conical surface (9).

[0008] A self-sealing member 11 is attached to the conical surface seal structure formed between the first outer conical surface 9 and the inner conical surface of the seal base 3 .

[0009] The third technical solution of the present invention is: An internal pressure self-sealing rotary compensator including a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body, the end of the fixed tube 1 presents a tapered opening to form a variable diameter tube, a seal base 3 is connected to the tapered opening end, a rotary base 4 consisting of a polyhedron is provided in the inner cavity of the seal base 3, the polyhedron is composed of a first end face 401, a second end face 402, a first annular surface 403 and a third conical surface 404, the end of the rotatable tube 2 is provided with a first conical surface 9 that fits the third conical surface 404 to realize a conical surface seal, a third end face 901 connected to the first conical surface 9, a second annular surface 902 connected to the third end face 901 and a third conical surface 903 connected to the second annular surface 902. Two outer conical surfaces 10 are provided, and a self-sealing cavity for mounting an end face self-sealing member 7 is formed between the second end face 402 and the third end face 901, the taper of the second outer conical surface 10 matches the taper of the tapered opening at the end of the fixed tube 1, the inner diameter of the first annular surface 403 matches the outer diameter of the rotatable tube 2, and an annular seal cavity for mounting an annular seal member 5 is formed between the first end face 401, the third annular surface 301 of the seal base 3, and the outer surface of the rotatable tube 2, and the annular seal member 5 is axially positioned by a clamping cover 6, and the clamping cover 6 is connected to the seal base 3 by a fastener 12.

[0010] A self-sealing member 11 is attached to the conical surface seal structure formed between the first outer conical surface 9 and the third outer conical surface 404 .

[0011] The fourth technical solution of the present invention is: An internal pressure self-sealing rotary compensator including a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body, the end of the fixed tube 1 presents a tapered opening to form a variable diameter tube, the tapered opening end of which is connected to a seal base 3, and a rotary base 4 made of a polyhedron is provided in the inner cavity of the seal base 3, the polyhedron being composed of a first end face 401, a second end face 402, a first annular surface 403, a third conical surface 404, and a fourth conical surface 405, the end of the rotatable tube 2 is provided with a first conical surface 9 that matches the third conical surface 404 to realize sealing of the conical surface, a third end face 901 connected to one end of the first conical surface 9, a fifth end face 905 connected to the other end, a second annular surface 902 connected to the third end face 901, and a second outer conical surface 10 connected to the second annular surface 902, and the second end face 402 is connected to the third end face 403. Between the first end face 402 and the third end face 901, a first self-sealing cavity for mounting an end face self-sealing member 7 is formed, and between the fourth end face 405 and the fifth end face 905, a second self-sealing cavity for mounting an end face self-sealing member 7 is formed, the taper of the second outer conical surface 10 matches the taper of the tapered opening at the end of the fixed tube 1, the inner diameter of the first annular surface 403 matches the outer diameter of the rotatable tube 2, and between the first end face 401, the third annular surface 301 of the seal base 3, and the outer surface of the rotatable tube 2, an annular seal cavity for mounting an annular seal member 5 is formed, and the annular seal member 5 is axially positioned by a clamping cover 6, and the clamping cover 6 is connected to the seal base 3 by a fastener 12.

[0012] A self-sealing member 11 is attached to the conical surface seal structure formed between the first outer conical surface 9 and the third outer conical surface 404 .

[0013] Beneficial Effects of the Invention: The present invention further improves high pressure sealing performance by increasing the cone face seal, which complements and improves the end face seal.

[0014] The present invention has a simple structure and is more convenient to manufacture, which can reduce the performance index of the end face seal member and reduce the production cost. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram of a first structure of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of a second structure of the present invention. [Diagram 3] FIG. 1 is a schematic diagram of a third structure of the present invention. [Figure 4] FIG. 13 is a schematic diagram of a fourth structure of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will be further described below with reference to the drawings and examples.

[0017] [Example 1] As shown in Fig. 1, the internal pressure self-sealing rotary compensator includes a fixed pipe 1 and a rotatable pipe 2, the inside diameters of which are the same, and the end of the fixed pipe 1 has a tapered opening to form a variable diameter pipe, and a seal base 3 is connected to the tapered opening end by welding. A rotating base 4 with an inwardly convex shape is provided in the inner cavity of the seal base 3, and the inner diameter of the rotating base 4 matches the outer diameter of the rotatable pipe 2. An annular seal member 5 (conventional pressure-resistant seal member or powder can be used) is attached to the outside of the rotating base 4. The annular seal member 5 is fixed to the annular seal cavity consisting of the outer end surface of the rotating base 2, the inner surface of the seal base 3, and the rotatable pipe 2 by a pressing lid 6. The pressing lid 6 is connected to the seal base 3 by a fastener 12 (bolt nut structure, the same below), and an end self-seal member 7 (Chinese Patent 200 The structure disclosed in US Pat. No. 810023454.5 may be adopted, and the same applies below), the outer surface of the end face self-sealing member 7 abuts against the arc-shaped annular convex surface 8 on the rotatable tube 2, the outer part of the arc-shaped annular convex surface 8 smoothly transitions to the first outer conical surface 9 at the end of the rotatable tube 2, the inner part of the arc-shaped annular convex surface 8 intersects with the outer surface of the rotatable tube 2, the taper of the first outer conical surface 9 matches the taper of the inner conical surface at the end of the seal base 3, the first outer conical surface 9 is connected to the second outer conical surface 10, and the taper of the second outer conical surface 10 matches the taper of the tapered opening at the end of the fixed tube 1. A conical surface seal structure is formed between the first outer conical surface 9 and the inner conical surface of the seal base 3. The lower arc part of the arc-shaped annular convex surface, the outer surface of the end face self-sealing member, and the outer surface of the rotatable tube are surrounded by a pressure balance cavity. A self-sealing member 11 (a conventional pressure-resistant sealing member or powder can be adopted) is attached to the conical surface seal structure.

[0018] [Example 2] As shown in FIG. 2, an internal pressure self-sealing rotary compensator includes a fixed tube 1 and a rotatable tube 2, the inside diameters of which are the same. The end of the fixed tube 1 has a tapered opening to form a variable diameter tube, and a seal base 3 is connected to the tapered opening end by welding. The inner cavity of the seal base 3 is provided with a rotating base 4, which consists of a vertical end face perpendicular to the axis of the rotatable tube 2, an annular surface parallel to the axis, and a conical surface forming an acute angle with the axis. The inner diameter of the annular surface is adapted to the outer diameter of the rotatable tube 2, and the vertical end face of the rotating base 4 and An annular seal cavity is formed between the inner annular surface connected to the vertical end surface and the outer surface of the rotatable tube 2, an annular seal member 5 is attached to the annular seal cavity and axial positioning is achieved by a pressing lid 6, the pressing lid 6 is connected to the seal base 3 by a fastener 12, a first outer conical surface 9 capable of realizing a conical seal matching the conical surface is provided at the end of the rotatable tube 2, and a second outer conical surface 10 whose taper matches the taper of the tapered opening at the end of the fixed tube 1 is connected to the first outer conical surface 9. A self-sealing member 11 is attached to the conical seal structure formed between the first outer conical surface 9 and the inner conical surface of the seal base 3.

[0019] [Example 3] As shown in FIG. 3, an internal pressure self-sealing rotary compensator includes a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body, the end of the fixed tube 1 has a tapered opening to form a variable diameter tube, the tapered opening end is connected to a seal base 3, and a rotary base 4 made of a polyhedron is provided in the inner cavity of the seal base 3, the polyhedron is composed of a first end face 401, a second end face 402, a first annular surface 403 and a third conical surface 404, the end of the rotatable tube 2 has a first conical surface 9 that fits the third conical surface 404 to realize a conical surface seal, a third end face 901 connected to the first conical surface 9, a second annular surface 902 connected to the third end face 901, and a third annular surface 902 connected to the third end face 901. A second outer conical surface 10 is provided which is connected to the second end face 402, and a self-sealing cavity for attaching the end face self-sealing member 7 is formed between the second end face 402 and the third end face 901, the taper of the second outer conical surface 10 matches the taper of the tapered opening at the end of the fixed tube 1, the inner diameter of the first annular surface 403 matches the outer diameter of the rotatable tube 2, and an annular seal cavity for attaching the annular seal member 5 is formed between the first end face 401, the third annular surface 301 of the seal base 3, and the outer surface of the rotatable tube 2, and the annular seal member 5 is axially positioned by a clamping cover 6, and the clamping cover 6 is connected to the seal base 3 by a fastener 12.

[0020] A self-sealing member 11 is attached to the conical surface seal structure formed between the first outer conical surface 9 and the third outer conical surface 404 .

[0021] [Example 4] As shown in FIG. 4, an internal pressure self-sealing rotary compensator includes a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body. The end of the fixed tube 1 has a tapered opening to form a variable diameter tube, and a seal base 3 is connected to the tapered opening end. A rotary base 4 made of a polyhedron is provided in the inner cavity of the seal base 3. The polyhedron is composed of a first end face 401, a second end face 402, a first ring surface 403, a third conical surface 404, and a fourth conical surface 405. The end of the rotatable tube 2 is provided with a first conical surface 9 that matches the third conical surface 404 to realize sealing of the conical surface, a third end face 901 connected to one end of the first conical surface 9, a fifth end face 905 connected to the other end, a second ring surface 902 connected to the third end face 901, and a second outer conical surface 10 connected to the second ring surface 902. The second end face 402 is connected to the third end face 901. and the third end face 901, a first self-sealing cavity for mounting the end face self-sealing member 7 is formed, and a second self-sealing cavity for mounting the end face self-sealing member 7 is also formed between the fourth end face 405 and the fifth end face 905, the taper of the second outer conical surface 10 matches the taper of the tapered opening at the end of the fixed tube 1, the inner diameter of the first annular surface 403 matches the outer diameter of the rotatable tube 2, and an annular seal cavity for mounting the annular seal member 5 is formed between the first end face 401, the third annular surface 301 of the seal base 3, and the outer surface of the rotatable tube 2, and the annular seal member 5 is axially positioned by a pressing lid 6, and the pressing lid 6 is connected to the seal base 3 by a fastener 12. An internal pressure self-sealing rotation compensator. A self-sealing member 11 is attached to the conical seal structure formed between the first outer conical surface 9 and the third outer conical surface 404.

[0022] In the present invention, all parts not mentioned are the same as the prior art or can be realized using the prior art.

Claims

1. An internal pressure self-sealing rotary compensator including a fixed pipe (1) and a rotatable pipe (2) having the same inner diameter of the main body, the end of the fixed pipe (1) presents a tapered opening to form a variable diameter pipe, a seal base (3) is connected to the tapered opening end, an inwardly convex rotating base (4) is provided in the inner cavity of the seal base (3), the inner diameter of the rotating base (4) matches the outer diameter of the rotatable pipe (2), an annular seal member (5) is attached to the outside of the rotating base (4), the annular seal member (5) is fixed to an annular seal cavity consisting of the outer end surface of the rotating base (2), the inner surface of the seal base (3) and the rotatable pipe (2) by a pressing lid (6), and the pressing lid (6) is sealed by a fastener (12). the rotating base (4) is connected to the rotatable tube (2) and an end self-sealing member (7) is attached to the inside of the rotating base (4), the outer surface of the end self-sealing member (7) abuts against an arc-shaped annular convex surface (8) on the rotatable tube (2), the outer portion of the arc-shaped annular convex surface (8) smoothly transitions to a first outer conical surface (9) at the end of the rotatable tube (2), the inner portion of the arc-shaped annular convex surface (8) intersects with the outer surface of the rotatable tube (2), the taper of the first outer conical surface (9) matches the taper of the inner conical surface at the end of the seal base (3), the first outer conical surface (9) is connected to a second outer conical surface (10), the taper of the second outer conical surface (10) matches the taper of the tapered opening at the end of the fixed tube (1).

2. The internal pressure self-sealing rotation compensator according to claim 1, characterized in that a conical surface seal structure is formed between the first outer conical surface (9) and the inner conical surface of the seal base (3).

3. 3. The internal pressure self-sealing rotation compensator according to claim 2, wherein the conical surface seal structure is equipped with a self-sealing member (11).

4. An internal pressure self-sealing rotary compensator including a fixed pipe (1) and a rotatable pipe (2) having the same inner diameter of the main body, the end of the fixed pipe (1) presents a tapered opening to form a variable diameter pipe, a seal base (3) is connected to the tapered opening end, a rotary base (4) is provided in the inner cavity of the seal base (3) and is composed of a vertical end face perpendicular to the axis of the rotatable pipe (2), an annular surface parallel to the axis, and a conical surface forming an acute angle with the axis, the inner diameter of the annular surface conforming to the outer diameter of the rotatable pipe (2), the vertical end face of the rotary base (4), an inner annular surface connected to the vertical end face, and the rotatable pipe (2) are connected to the vertical end face of the rotary base (4) and the inner annular surface connected to the vertical end face. an annular seal cavity is formed between the rotatable tube (2) and an outer surface of the fixed tube (1), an annular seal cavity is formed between the rotatable tube (2) and an outer surface of the fixed tube (1), a ring seal member (5) is attached to the ring seal cavity and axial positioning is achieved by a pressure cap (6), the pressure cap (6) is connected to a seal base (3) by a fastener (12), an end of the rotatable tube (2) is provided with a first outer conical surface (9) capable of achieving a conical seal that matches the conical surface, and a second outer conical surface (10) whose taper matches the taper of a tapered opening at the end of the fixed tube (1) is connected to the first outer conical surface (9).

5. The internal pressure self-sealing rotation compensator according to claim 4, characterized in that a self-sealing member (11) is attached to a conical surface seal structure formed between the first outer conical surface (9) and the conical surface of the seal base (3).

6. An internal pressure self-sealing rotary compensator including a fixed pipe (1) and a rotatable pipe (2) having the same inner diameter of the main body, the end of the fixed pipe (1) presents a tapered opening to form a variable diameter pipe, the tapered opening end of which is connected to a seal base (3), and a rotary base (4) made of a polyhedron is provided in the inner cavity of the seal base (3), the polyhedron having a first end face (401), a second end face (402), a first annular surface (403), and a third conical surface (404), and the end of the rotatable pipe (2) is provided with a first conical surface (9) that matches the third conical surface (404) for realizing a conical surface seal, a third end face (901) connected to the first conical surface (9), a second annular surface (902) connected to the third end face (901), and a second outer conical surface (10) connected to the second annular surface (902). the second end face (402) and the third end face (901) are provided with a self-sealing cavity for mounting an end face self-sealing member (7), the taper of the second outer conical surface (10) matches the taper of the tapered opening at the end of the fixed pipe (1), the inner diameter of the first annular surface (403) matches the outer diameter of the rotatable pipe (2), the first end face (401), the third annular surface (301) of the seal base (3) and the outer surface of the rotatable pipe (2) are provided with an annular seal cavity for mounting an annular seal member (5), the annular seal member (5) is axially positioned by a clamping cover (6), and the clamping cover (6) is connected to the seal base (3) by a fastener (12).

7. The internal pressure self-sealing rotation compensator according to claim 6, characterized in that a self-sealing member (11) is attached to the conical surface seal structure formed between the first outer conical surface (9) and the third outer conical surface (404).

8. An internal pressure self-sealing rotary compensator including a fixed tube (1) and a rotatable tube (2) having the same inner diameter of the main body, the end of the fixed tube (1) presents a tapered opening to form a variable diameter tube, the tapered opening end is connected to a seal base (3), and a rotary base (4) made of a polyhedron is provided in the inner cavity of the seal base (3), the polyhedron having a first end face (401), a second end face (402), a first annular surface (403), a third conical surface (404), and a second conical surface (405). The end of the rotatable tube (2) is provided with a first conical surface (9) that fits the third conical surface (404) for realizing sealing of the conical surface, a third end surface (901) connected to one end of the first conical surface (9), a fifth end surface (905) connected to the other end, a second annular surface (902) connected to the third end surface (901), and a second outer conical surface (10) connected to the second annular surface (902). an annular seal cavity for mounting an end face self-sealing member (7) is formed between the third end face (901), a second self-sealing cavity for mounting an end face self-sealing member (7) is also formed between the fourth end face (405) and the fifth end face (905); the taper of the second outer conical surface (10) matches the taper of the tapered opening at the end of the fixed pipe (1), the inner diameter of the first annular surface (403) matches the outer diameter of the rotatable pipe (2), and an annular seal cavity for mounting an annular seal member (5) is formed between the first end face (401), the third annular surface (301) of the seal base (3), and the outer surface of the rotatable pipe (2), and the annular seal member (5) is axially positioned by a clamping cover (6), and the clamping cover (6) is connected to the seal base (3) by a fastener (12).

9. The internal pressure self-sealing rotation compensator according to claim 8, characterized in that a self-sealing member (11) is attached to the conical surface seal structure formed between the first outer conical surface (9) and the third outer conical surface (404).

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