Internal pressure self-sealing rotational 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 technology, particularly to an apparatus for compensating the length of a transport pipeline, specifically an internal pressure self-sealing rotary compensator.

Background Art

[0002] Currently, the rotary compensator from Chinese Patent ZL2006100413011 has been widely spread and applied. Such a compensator can meet the compensation requirements for large-diameter long-distance pipelines through a reasonable combination, and has already been applied in various gas-liquid transport pipelines, significantly reducing the cost of pipeline compensation and enhancing safety. However, during use, the applicant noticed that existing compensators must be fitted with high-pressure-resistant sealing rings, and the requirements for the sealing performance and pressure resistance performance of the sealing rings are too high, making them prone to damage during use and requiring regular replacement to ensure safe operation. Since this situation is closely related to the structure of the compensator, changing the sealing structure of the compensator and adding a conical surface seal on the premise of retaining the end face seal and the toroidal seal is the key to enhancing the long-term safe operation of the rotary compensator.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The object of the present invention is to design an internal pressure self-sealing rotary compensator with an increased conical surface to address the problem that conventional rotary compensators have difficulty meeting long-term safe operation with a single end face seal. The conical surface seal can achieve the advantage that the sealing performance is better as the pressure increases.

Means for Solving the Problems

[0004] The first technical solution of the present invention is An internal pressure self-sealing rotational compensator comprising a fixed tube 1 and a rotatable tube 2 having the same inner diameter, wherein the end of the fixed tube 1 has a tapered opening to form a variable diameter tube, a seal base 3 is connected to the tapered opening end, an inwardly convex rotating base 4 is provided in the lumen of the seal base 3, the inner diameter of the rotating base 4 matches the outer diameter of the rotatable tube 2, an annular sealing member 5 is attached to the outside of the rotating base 4, the annular sealing member 5 is fixed by a retaining cover 6 to an annular sealing 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, and the retaining cover 6 is fastened with a fastener 1 The seal base 3 is connected by 2, and 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 ring convex surface 8 on the rotatable tube 2, the outer portion of the arc-shaped ring 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 ring 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, 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.

[0005] A conical 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 convex ring, the outer surface of the end face self-sealing member, and the outer surface of the rotatable tube are all surrounded by a pressure equilibrium cavity.

[0006] The aforementioned conical surface sealing structure is fitted with a self-sealing member 11.

[0007] A second technical solution of the present invention is: An internal pressure self-sealing rotational compensator comprising a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body, wherein 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, and a rotational base 4 is provided in the lumen of the seal base 3, which consists of a vertical end face perpendicular to the axis of the rotatable tube 2, an annular face parallel to the axis, and a conical face at an acute angle to the axis, wherein the inner diameter of the annular face matches the outer diameter of the rotatable tube 2, and the vertical end face of the rotational base 4 and the inner annular face connected to the vertical end face An annular seal cavity is formed between the rotatable tube 2 and the outer surface of the rotatable tube 2, an annular seal member 5 is attached to the annular seal cavity and its axial positioning is achieved by a retaining cover 6, the retaining cover 6 is connected to the seal base 3 by a fastener 12, a first outer conical surface 9 capable of achieving a conical seal that matches 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.

[0008] 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.

[0009] A third technical solution of the present invention is: An internal pressure self-sealing rotational compensator comprising a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body, wherein the end of the fixed tube 1 exhibits a tapered opening to form a variable diameter tube, a seal base 3 is connected to the tapered opening end, and a polyhedron-shaped rotational base 4 is provided in the lumen of the seal base 3, the polyhedron consisting of a first end face 401, a second end face 402, a first ring face 403 and a third pyramidal face 404, the end of the rotatable tube 2 has a first pyramidal face 9 that fits the third pyramidal face 404 for achieving pyramidal seal, a third end face 901 connected to the first pyramidal face 9, a second ring face 902 connected to the third end face 901 and a third ring face 902 connected to the second ring face 902 Two outer conical surfaces 10 are provided, a self-sealing cavity is formed between the second end surface 402 and the third end surface 901 for attaching the end surface 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 ring surface 403 matches the outer diameter of the rotatable pipe 2, an annular seal cavity is formed between the first end surface 401, the third ring surface 301 of the seal base 3, and the outer surface of the rotatable pipe 2 for attaching the annular sealing member 5, the annular sealing member 5 is positioned axially by a retaining cover 6, and the retaining 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 rotational compensator comprising a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body, wherein the end of the fixed tube 1 exhibits a tapered opening to form a variable diameter tube, a seal base 3 is connected to the tapered opening end, a polyhedron-shaped rotational base 4 is provided in the lumen of the seal base 3, the polyhedron consists of a first end face 401, a second end face 402, a first ring face 403, a third pyramidal face 404, and a fourth pyramidal face 405, the end of the rotatable tube 2 is provided with a first pyramidal face 9 that fits the third pyramidal face 404 for achieving a pyramidal seal, a third end face 901 connected to one end of the first pyramidal face 9, a fifth end face 905 connected to the other end, a second ring face 902 connected to the third end face 901, and a second outer pyramidal face 10 connected to the second ring face 902, and the second end face 4 A first self-seal cavity for attaching the end face self-sealing member 7 is formed between 02 and the third end face 901, and a second self-seal cavity for attaching 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, and the inner diameter of the first ring surface 403 matches the outer diameter of the rotatable tube 2. An annular seal cavity for attaching the annular sealing member 5 is formed between the first end face 401, the third ring surface 301 of the seal base 3, and the outer surface of the rotatable tube 2. The annular sealing member 5 is axially positioned by a retaining cover 6, and the retaining 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 present invention: This invention further improves high-pressure sealing performance by increasing the number of cone-shaped seals, thereby supplementing and improving end-face seals.

[0014] This invention has a simple structure and is easier to manufacture. It can lower the performance indicators of end-face sealing members and reduce production costs. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram of the first structure of the present invention. [Figure 2] This is a schematic diagram of the second structure of the present invention. [Figure 3] This is a schematic diagram of the third structure of the present invention. [Figure 4] This is a schematic diagram of the fourth structure of the present invention. [Modes for carrying out the invention]

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

[0017] [Example 1] As shown in Figure 1, the internal pressure self-sealing rotational compensator includes a fixed tube 1 and a rotatable tube 2 having the same inner diameter, the end of the fixed tube 1 having a tapered opening to form a variable diameter tube, and a seal base 3 is connected to the tapered opening end by welding. An inwardly convex rotating base 4 is provided in the lumen of the seal base 3, the inner diameter of the rotating base 4 matches the outer diameter of the rotatable tube 2, an annular sealing member 5 (conventional pressure-resistant sealing members or powder can be used) is attached to the outside of the rotating base 4, the annular sealing member 5 is fixed by a retaining cover 6 to an annular sealing 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, the retaining cover 6 is connected to the seal base 3 by fasteners 12 (bolt and nut structure, the same applies hereinafter), and an end-face self-sealing member 7 (Chinese Patent 200) is attached to the inside of the rotating base 4 The structure published in 810023454.5 (and the same applies hereafter) is adopted, and the outer surface of the end face self-sealing member 7 abuts against the arc-shaped ring convex surface 8 on the rotatable tube 2, the outer portion of the arc-shaped ring convex surface 8 smoothly transitions to the first outer conical surface 9 at the end of the rotatable tube 2, the inner portion of the arc-shaped ring convex surface 8 intersects 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, 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 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 ring 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 equilibrium cavity. The aforementioned conical surface sealing structure is equipped with a self-sealing member 11 (conventional pressure-resistant sealing members or powders can be used).

[0018] [Example 2] As shown in Figure 2, the internal pressure self-sealing rotational compensator includes a fixed tube 1 and a rotatable tube 2 having the same inner diameter, wherein 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, and a rotational base 4 is provided in the lumen of the seal base 3, which consists of a vertical end face perpendicular to the axis of the rotatable tube 2, an annular face parallel to the axis, and a conical face at an acute angle to the axis, the inner diameter of the annular face matches the outer diameter of the rotatable tube 2, and the vertical end face of the rotational base 4, An annular seal cavity is formed between the inner annular surface connected to the vertical end face and the outer surface of the rotatable tube 2. An annular seal member 5 is attached to the annular seal cavity and its axial positioning is achieved by a retaining cover 6. The retaining cover 6 is connected to the seal base 3 by a fastener 12. A first outer conical surface 9 is provided at the end of the rotatable tube 2, which is capable of achieving a conical seal that matches the conical surface. A second outer conical surface 10 is connected to the first outer conical surface 9, the taper of which matches the taper of the tapered opening at the end of the fixed tube 1. A self-sealing member 11 is installed in 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 pipe 1 and a rotatable pipe 2 with the same inner diameter of the main body portion. The end of the fixed pipe 1 presents a tapered opening to form a reduced-diameter pipe, and a seal base 3 is connected to the tapered opening end. A rotary base 4 composed of a polyhedron is provided in the inner cavity of the seal base 3. The polyhedron consists of a first end face 401, a second end face 402, a first annular face 403 and a third tapered face 404. At the end of the rotatable pipe 2, a first tapered face 9 adapted to the third tapered face 404 for realizing a tapered face seal, a third end face 901 connected to the first tapered face 9, a second annular face 902 continuous with the third end face 901 and a second outer tapered face 10 continuous with the second annular face 902 are provided. A self-sealing cavity for mounting a 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 tapered face 10 conforms to the taper of the tapered opening at the end of the fixed pipe 1. The inner diameter of the first annular face 403 conforms to the outer diameter of the rotatable pipe 2. An annular face seal cavity for mounting an annular face seal member 5 is formed between the first end face 401, the third annular face 301 of the seal base 3 and the outer surface of the rotatable pipe 2. The annular face seal member 5 is axially positioned by a pressing cover 6, and the pressing cover 6 is connected to the seal base 3 by a fastener 12.

[0020] A self-sealing member 11 is mounted in the tapered face seal structure formed between the first outer tapered face 9 and the third outer tapered face 404.

[0021] [Example 4] As shown in Figure 4, the internal pressure self-sealing rotational compensator includes a fixed tube 1 and a rotatable tube 2 having the same inner diameter of the main body portion, the end of the fixed tube 1 has a tapered opening to form a variable diameter tube, a seal base 3 is connected to the tapered opening end, a polyhedron-shaped rotational base 4 is provided in the lumen of the seal base 3, the polyhedron consists of a first end face 401, a second end face 402, a first ring face 403, a third pyramidal face 404, and a fourth pyramidal face 405, the end of the rotatable tube 2 is provided with a first pyramidal face 9 that fits the third pyramidal face 404 for achieving a pyramidal seal, a third end face 901 connected to one end of the first pyramidal face 9, a fifth end face 905 connected to the other end, a second ring face 902 connected to the third end face 901, and a second outer pyramidal face 10 connected to the second ring face 902, and the second end face 402 An internal pressure self-seal rotation compensator is characterized in that a first self-seal cavity for attaching an end face self-sealing member 7 is formed between the first end face 9 and the third end face 901, a second self-seal cavity for attaching 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 tube 1, the inner diameter of the first ring surface 403 matches the outer diameter of the rotatable tube 2, an ring surface seal cavity for attaching an ring surface sealing member 5 is formed between the first end face 401, the third ring surface 301 of the seal base 3 and the outer surface of the rotatable tube 2, the ring surface sealing member 5 is positioned axially by a retaining cover 6, and the retaining cover 6 is connected to the seal base 3 by a fastener 12. A self-sealing member 11 is mounted in the conical seal structure formed between the first outer conical surface 9 and the third outer conical surface 404.

[0022] In this invention, all aspects not mentioned are either the same as those in the prior art or can be realized using the prior art.

Claims

1. An internal pressure self-sealing rotational compensator comprising a fixed tube (1) and a rotatable tube (2) having the same inner diameter, wherein the end of the fixed tube (1) has a tapered opening to form a variable diameter tube, a seal base (3) is connected to the tapered opening end, an inwardly convex rotating base (4) is provided in the lumen of the seal base (3), the inner diameter of the rotating base (4) matches the outer diameter of the rotatable tube (2), an annular sealing member (5) is attached to the outside of the rotating base (4), the annular sealing member (5) is fixed by a retaining cover (6) to an annular sealing 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), and the retaining cover (6) is sealed by fasteners (12). An internal pressure self-sealing rotational compensator characterized by being connected to a seal base (3), having an end-face self-sealing member (7) attached to the inside of a rotating base (4), the outer surface of the end-face self-sealing member (7) contacting an arc-shaped annular convex surface (8) on a rotatable tube (2), the outer portion of the arc-shaped annular convex surface (8) smoothly transitioning 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) intersecting the outer surface of the rotatable tube (2), the taper of the first outer conical surface (9) conforming to the taper of the inner conical surface at the end of the seal base (3), the first outer conical surface (9) being connected to a second outer conical surface (10), and the taper of the second outer conical surface (10) conforming to the taper of the tapered opening at the end of the fixed tube (1).

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

3. The internal pressure self-sealing rotational compensator according to claim 2, characterized in that a self-sealing member (11) is attached to the conical surface seal structure.

4. An internal pressure self-sealing rotational compensator comprising a fixed tube (1) and a rotatable tube (2) having the same inner diameter of the main body, wherein 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, and a rotating base (4) is provided in the lumen of the seal base (3) consisting 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 at an acute angle to the axis, wherein the inner diameter of the annular surface matches the outer diameter of the rotatable tube (2), and the vertical end face of the rotating base (4), an inner annular surface connected to the vertical end face, and the rotatable tube (2) An internal pressure self-sealing rotational compensator characterized in that an annular seal cavity is formed between the outer surface of the rotatable tube (2) and the annular seal cavity, an annular seal member (5) is attached to the annular seal cavity and its axial positioning is achieved by a retaining cover (6), the retaining cover (6) is connected to the seal base (3) by a fastener (12), a first outer conical surface (9) capable of realizing a conical seal that conforms to the conical surface is provided at the end of the rotatable tube (2), and a second outer conical surface (10) whose taper conforms to the taper of the tapered opening at the end of the fixed tube (1) is connected to the first outer conical surface (9).

5. The internal pressure self-seal rotation compensator according to claim 4, characterized in that a self-sealing member (11) is attached to the conical 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 rotational compensator comprising a fixed tube (1) and a rotatable tube (2) having the same inner diameter of the main body, wherein the end of the fixed tube (1) has a tapered opening to form a variable diameter tube, a seal base (3) is connected to the tapered opening end, a polyhedron-shaped rotational base (4) is provided in the lumen of the seal base (3), the polyhedron consists of a first end face (401), a second end face (402), a first ring face (403), and a third pyramidal face (404), the end of the rotatable tube (2) has a first pyramidal face (9) that fits the third pyramidal face (404) for achieving pyramidal sealing, a third end face (901) connected to the first pyramidal face (9), a second ring face (902) connected to the third end face (901), and a second outer pyramidal face (10) connected to the second ring face (902). An internal pressure self-seal rotational compensator is characterized by the following features: a self-seal cavity for attaching 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 ring surface (403) matches the outer diameter of the rotatable tube (2); an ring surface seal cavity for attaching an ring surface sealing member (5) is formed between the first end face (401), the third ring surface (301) of the seal base (3), and the outer surface of the rotatable tube (2); the ring surface sealing member (5) is axially positioned by a retaining cover (6); and the retaining cover (6) is connected to the seal base (3) by a fastener (12).

7. The internal pressure self-sealing rotational 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 rotational compensator comprising a fixed tube (1) and a rotatable tube (2) having the same inner diameter, wherein the end of the fixed tube (1) has a tapered opening to form a variable diameter tube, a seal base (3) is connected to the tapered opening end, and a polyhedron-shaped rotational base (4) is provided in the lumen of the seal base (3), the polyhedron having a first end face (401), a second end face (402), a first ring face (403), and a third pyramidal face (404), a fourth end face (405), and at the end of the rotatable tube (2) are provided a first pyramidal surface (9) that fits the third pyramidal surface (404) for achieving a pyramidal surface seal, a third end face (901) connected to one end of the first pyramidal 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 pyramidal surface (10) connected to the second ring surface (902), and the second end face (402) and An internal pressure self-seal rotational compensator characterized in that a first self-seal cavity for attaching an end face self-sealing member (7) is formed between the three end faces (901), a second self-seal cavity for attaching 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 tube (1), the inner diameter of the first ring surface (403) matches the outer diameter of the rotatable tube (2), an annular seal cavity for attaching an annular sealing member (5) is formed between the first end face (401), the third ring surface (301) of the seal base (3), and the outer surface of the rotatable tube (2), the annular sealing member (5) is positioned axially by a retaining cover (6), and the retaining cover (6) is connected to the seal base (3) by a fastener (12).

9. The internal pressure self-sealing rotational compensator according to claim 8, characterized in that 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).

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