A vacuum isolation valve assembly with a double-layer containment structure

Abstract

The present invention discloses a vacuum isolation valve assembly with a double-layer containment structure, which includes a vacuum dynamic seal, a secondary containment structure assembly, a fuel inlet extension pipe, a fuel outlet extension pipe, a second manual angle valve and a sandwich bypass corrugated connection assembly, the two ends of the secondary containment structure assembly are respectively connected to the vacuum dynamic seal and the fuel outlet extension pipe, the side ends of the secondary containment structure assembly are respectively connected to the fuel inlet extension pipe and the second manual angle valve, and the fuel inlet extension pipe and the second manual angle valve are connected through the sandwich bypass corrugated connection assembly. Its beneficial effects are: it is mainly suitable for the gas fuel injection system of the thermonuclear fusion experimental reactor device, and it can not only isolate and control the internal fuel pipeline, but also isolate and control the sandwich space of the double-layer containment pipe.

Description

Technical Field

[0001] The present invention belongs to the field of fuel injection systems for thermonuclear fusion experimental reactor devices, and specifically relates to a high vacuum all-metal isolation valve assembly that is suitable for a concentric double-layer containment tube and can respectively implement vacuum isolation control on a primary containment pipeline (fuel pipe) of the concentric double-layer containment tube and an interlayer space of the double-layer containment tube. Background Art

[0002] In a thermonuclear fusion experimental reactor device, the fuel gases such as deuterium and tritium required for fusion are usually provided by a tritium factory and transported to the vacuum chamber of the thermonuclear fusion experimental reactor via a fuel injection system to provide the establishment, maintenance and control of the burning plasma. In order to prevent the leakage of fuel gas from harming personnel and the environment, the injection pipe of the fuel gas usually adopts a concentric double-layer containment pipe structure, with the inner pipe as a fuel delivery pipe and the outer pipe as a secondary containment pipe. In this way, even if the fuel pipe leaks, the fuel gas will be constrained in the containment pipe and will not leak directly into the external environment to cause harm. At the same time, the fuel gas leaking into the interlayer space of the containment pipe can also be monitored by the leak detection system, so as to respond quickly and ensure the safe operation of the system. The isolation valve applied to the concentric double-layer containment pipe, in addition to meeting the requirements of high vacuum and metal sealing, also needs to take into account the needs of safe operation of the system, that is, the leakage caused by the failure of the valve body that controls the fuel isolation must be monitored and cannot be directly leaked into the external environment. The present invention provides a possibility for such an application, which is a high vacuum all-metal isolation valve assembly (component) with a double-layer containment structure required for the safe operation of the system. When in use, the flange structure is connected to the concentric double-layer containment tube of the fuel injection pipe, so that the function and requirement of separating / isolating the fuel pipe and the sandwich space of the double-layer containment tube in the concentric double-layer containment tube can be realized. Summary of the invention

[0003] The object of the present invention is to provide a vacuum isolation valve assembly with a double-layer containment structure, which can respectively implement vacuum isolation control on the primary containment pipeline (fuel pipe) of the concentric double-layer containment tube and the interlayer space of the double-layer containment tube.

[0004] The technical solution of the present invention is as follows: a vacuum isolation valve assembly with a double-layer containment structure, which includes a vacuum dynamic seal, a secondary containment structure assembly, a fuel inlet extension pipe fitting, a fuel outlet extension pipe fitting, a second manual angle valve and a sandwich bypass corrugated connection assembly, the two ends of the secondary containment structure assembly are respectively connected to the vacuum dynamic seal and the fuel outlet extension pipe fitting, the side ends of the secondary containment structure assembly are respectively connected to the fuel inlet extension pipe fitting and the second manual angle valve, and the fuel inlet extension pipe fitting and the second manual angle valve are connected through the sandwich bypass corrugated connection assembly.

[0005] The fuel inlet extension pipe fitting, the first manual angle valve and the fuel outlet extension pipe fitting constitute a primary containment pipeline.

[0006] One end of the first manual angle valve is connected to the fuel outlet extension pipe fitting, a fifth metal sealing ring is installed between the one end of the first manual angle valve and the fuel outlet extension pipe fitting, and the fuel outlet extension pipe fitting is covered with an outlet containing pipe fitting.

[0007] The outer cover of the first manual angle valve comprises an outer shell A and an outer shell B, the outer shell A is connected with a CF vacuum flange, the CF vacuum flange is connected with the second manual angle valve, and a first metal sealing ring is installed between the CF vacuum flange and the second manual angle valve.

[0008] The side end of the first manual angle valve is connected to the fuel inlet extension pipe fitting, a third metal sealing ring is installed between the side end of the first manual angle valve and the fuel inlet extension pipe fitting, an inlet containing pipe fitting A is sleeved on the fuel inlet extension pipe fitting, and the fuel inlet extension pipe fitting is connected to the inlet containing pipe fitting B.

[0009] The vacuum dynamic seal, shaft connector containing pipe fitting, outer shell A, outer shell B, inlet containing pipe fitting A, inlet containing pipe fitting B, first manual angle valve, interlayer bypass corrugated connection assembly and outlet containing pipe fitting constitute a secondary containing layer.

[0010] The vacuum dynamic seal is connected to an axis connector, the vacuum dynamic seal is connected to the axis connector containing pipe fitting, a second metal sealing ring is installed between the vacuum dynamic seal and the axis connector containing pipe fitting, the axis connector passes through the axis connector containing pipe fitting and is connected to the first manual angle valve, the inlet containing pipe fitting B is connected to the second CF vacuum flange, a fourth metal sealing ring is arranged between the inlet containing pipe fitting B and the second CF vacuum flange, the second CF vacuum flange is connected to the bellows section, the bellows section is connected to the bent pipe section, the bent pipe section is connected to the first CF vacuum flange, the first CF vacuum flange is connected to the side end of the second manual angle valve, and a first metal sealing ring is installed between the first CF vacuum flange and the second manual angle valve.

[0011] The beneficial effects of the present invention are as follows: it is mainly applicable to the gas fuel injection system of the thermonuclear fusion experimental reactor device, and it can not only isolate and control the internal fuel pipeline, but also isolate and control the interlayer space of the double-layer containment tube. This component structure can not only meet the safety requirements of fuel pipe shut-off control and double-layer protection, but also meet the application requirements of isolating and controlling the interlayer space in system leak detection and leak point location. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 An isometric view of a vacuum isolation valve assembly with a double-layer containment structure provided by the present invention;

[0013] Figure 2 An exploded view of a vacuum isolation valve assembly with a double-layer containment structure provided by the present invention.

[0014] In the figure, 1 is a first manual angle valve, 2 is a vacuum dynamic seal, 3 is a shaft connector, 4 is a secondary containing structure assembly, 41 is a shaft connector containing pipe fitting, 421 is an outer shell A, 422 is a CF vacuum flange, 43 is an outer shell B, 44 is an inlet containing pipe fitting A, 452 is an inlet containing pipe assembly B, 451 is an inlet containing pipe fitting B, 452 is a CF vacuum flange, 46 is an outlet containing pipe fitting, 5 is a fuel inlet extension pipe fitting, 6 is a fuel outlet extension pipe fitting, 7 is a second manual angle valve, 8 is a sandwich bypass corrugated connection assembly, 81 is a first CF vacuum flange, 82 is a curved pipe section, 83 is a corrugated pipe section, 84 is a second CF vacuum flange, 91 is a first metal sealing ring, 92 is a second metal sealing ring, 93 is a third metal sealing ring, 94 is a fourth metal sealing ring, and 95 is a fifth metal sealing ring. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] like Figure 1 As shown, a vacuum isolation valve assembly with a double-layer containment structure can implement vacuum isolation control on the primary containment pipeline (fuel pipe) of the concentric double-layer containment tube and the interlayer space of the double-layer containment tube respectively. It specifically includes a vacuum dynamic seal 2, a secondary containment structure assembly 4, a fuel inlet extension pipe 5, a fuel outlet extension pipe 6, a second manual angle valve 7 and an interlayer bypass corrugated connection assembly 8. The two ends of the secondary containment structure assembly 4 are respectively connected to the vacuum dynamic seal 2 and the fuel outlet extension pipe 6, and the side ends of the secondary containment structure assembly 4 are respectively connected to the fuel inlet extension pipe 5 and the second manual angle valve 7. The fuel inlet extension pipe 5 and the second manual angle valve 7 are connected via the interlayer bypass corrugated connection assembly 8.

[0017] The fuel inlet extension pipe 5, the first manual angle valve 1 and the fuel outlet extension pipe 6 constitute a primary containment (fuel) pipeline. One end of the first manual angle valve 1 is connected to the fuel outlet extension pipe 6, and a fifth metal sealing ring 95 is installed between one end of the first manual angle valve 1 and the fuel outlet extension pipe 6. The fuel outlet extension pipe 6 is covered with an outlet containment pipe 46.

[0018] The first manual angle valve 1 is covered with an outer shell A421 and an outer shell B43, the outer shell A421 is connected with a CF vacuum flange 422, the CF vacuum flange 422 is connected with the second manual angle valve 7, and a first metal sealing ring 91 is installed between the CF vacuum flange 422 and the second manual angle valve 7;

[0019] The side end of the first manual angle valve 1 is connected to the fuel inlet extension pipe 5, a third metal sealing ring 93 is installed between the side end of the first manual angle valve 1 and the fuel inlet extension pipe 5, an inlet containing pipe A44 is sleeved on the fuel inlet extension pipe 5, and the fuel inlet extension pipe 5 is connected to the inlet containing pipe B451;

[0020] The vacuum dynamic seal 2, the shaft connector containing pipe fitting 41, the outer shell A421, the outer shell B43, the inlet containing pipe fitting A44, the inlet containing pipe fitting B452, the first manual angle valve 1, the interlayer bypass corrugated connection component 8 and the outlet containing pipe fitting 46 constitute a secondary containing layer. An axis connector 3 is connected to the vacuum dynamic seal 2, and the vacuum dynamic seal 2 is connected to the axis connector containing pipe fitting 41. A second metal sealing ring 92 is installed between the vacuum dynamic seal 2 and the axis connector containing pipe fitting 41. The axis connector 3 passes through the axis connector containing pipe fitting 41 and is connected to the first manual angle valve 1. The inlet containing pipe fitting B452 is connected to the second CF vacuum flange 84. A fourth metal sealing ring 94 is arranged between the inlet containing pipe fitting B452 and the second CF vacuum flange 84. The second CF vacuum flange 84 is connected to the bellows section 83, the bellows section 83 is connected to the curved pipe section 82, the curved pipe section 82 is connected to the first CF vacuum flange 81, the first CF vacuum flange 81 is connected to the side end of the second manual angle valve 7, and a first metal sealing ring 91 is installed between the first CF vacuum flange 81 and the second manual angle valve 7.

[0021] The fuel inlet extension fitting, the inlet containing fitting A and the inlet containing fitting B are assembled and welded to form a vacuum partition of the interlayer space. The axially rotating vacuum dynamic seal is connected to the hexagonal head actuator of the all-metal manual angle valve in the secondary containing space through the shaft connector. The axial rotation of the vacuum dynamic seal is used to control the hexagonal head actuator of the angle valve to realize the operation and control of the all-metal manual angle valve of the primary containing (fuel) pipeline, while ensuring the vacuum sealing conditions of the secondary containing structure that meets the safe operation. The interlayer space vacuum partition structure, the high vacuum all-metal isolation angle valve and the interlayer bypass corrugated connection assembly are used to realize the connection and partition control of the secondary containing space. The components and parts are connected by welding or metal sealing structure to ensure the requirements of high vacuum and safe operation of fuel, and the interface adopts a concentric double-flange metal sealing structure to achieve a safe and reliable connection with the concentric double-layer containing pipe of the fuel injection line.

[0022] The assembly process of the present invention is as follows:

[0023] The outer shell A421 and the CF vacuum flange 422 are welded to form the outer shell assembly A4.

[0024] The inlet containing pipe fitting B451 and the CF vacuum flange 452 are welded to form the inlet containing pipe assembly B.

[0025] The bent pipe section 82, the bellows section 83 and the CF vacuum flange are welded to form a sandwich bypass bellows connection assembly 8, and the axial rotating vacuum dynamic seal 2 and the shaft connector 3 are assembled and fastened or welded into one body with pins.

[0026] The shaft sleeve connector CF flange, the second metal sealing ring 92 and the CF flange of the axially rotating vacuum dynamic seal 2 are fastened with bolts.

[0027] Assemble and fix the shaft connector 3 and the hexagonal head manual actuator of the first manual angle valve 1.

[0028] The CF flanges and metal sealing rings of the fuel inlet extension pipe fitting 5 and the fuel outlet extension pipe fitting 6 are fastened to the CF flanges of the inlet and outlet of the first manual angle valve 1 with bolts respectively.

[0029] After the outer shell assembly A42, the outer shell B43, the inlet containing pipe A44, the outlet containing pipe 46 and the shaft connector containing pipe 41 are assembled, they are fixed by spot welding. Then, the inlet containing pipe A44 and the fuel inlet extension pipe 5 are fixed by spot welding.

[0030] The welded shaft connector containing pipe fitting 41, the outer shell assembly A42, the outer shell B43, the inlet containing pipe fitting A44 and the outlet containing pipe fitting 46 constitute the secondary containing main structure of the fuel isolation valve.

[0031] The inlet containing pipe A44 and the fuel inlet extension pipe 5 are welded to form a physical partition of the secondary containing space.

[0032] Insert the inlet containment tube assembly B45 into the fuel inlet extension pipe fitting 5. After assembly, weld the inlet containment tube assembly B45 and the fuel inlet extension pipe fitting 5 to form the secondary containment of the fuel inlet pipe.

[0033] The outlet CF flange of the second manual angle valve 7, the metal sealing ring and the CF vacuum flange 422 of the outer shell A assembly 42 are fastened with bolts.

[0034] The inlet CF flange of the second manual angle valve 7, the metal sealing ring and the CF vacuum flange 81 of the sandwich bypass corrugated connection assembly 8 are fastened with bolts.

[0035] The first CF vacuum flange 84 of the interlayer bypass corrugated connection assembly 8, the metal sealing ring and the CF vacuum flange 452 of the inlet containment pipe assembly B45 are fastened with bolts.

[0036] During the specific implementation process, the following points should be noted:

[0037] The processing errors of the sub-components in the secondary containment assembly 4 and the fuel inlet extension pipe 5 are well controlled.

[0038] Necessary tooling must be used for welding between the sub-components of the secondary containment assembly 4 and between the secondary containment assembly 4 and the fuel inlet extension pipe 5. The welding process must be evaluated in advance and tested after welding to ensure the welding quality.

[0039] The primary containment fuel pipeline must be leak tested before assembly with the subcomponents of the secondary containment assembly, and the axial rotary vacuum dynamic seal 2 and the shaft connector 3 must be pre-connected and tested.

[0040] The flange edge must be protected during assembly and welding.

[0041] After the secondary containment assembly 4 is welded and before the interlayer bypass corrugated connection assembly 8 is installed, the leakage rate of the entire secondary containment assembly must be tested to check whether the welding quality meets the vacuum leakage rate requirements.

Claims

1. A vacuum isolation valve assembly with a double-layer containment structure, characterized in that: It comprises a vacuum dynamic seal (2), a secondary containment structure component (4), a fuel inlet extension pipe (5), a fuel outlet extension pipe (6), a second manual angle valve (7) and a sandwich bypass corrugated connection component (8); the two ends of the secondary containment structure component (4) are respectively connected to the vacuum dynamic seal (2) and the fuel outlet extension pipe (6); the side ends of the secondary containment structure component (4) are respectively connected to the fuel inlet extension pipe (5) and the second manual angle valve (7); the fuel inlet extension pipe (5) and the second manual angle valve (7) are connected via the sandwich bypass corrugated connection component (8); The fuel inlet extension pipe (5), the first manual angle valve (1) and the fuel outlet extension pipe (6) constitute a primary containment pipeline; One end of the first manual angle valve (1) is connected to the fuel outlet extension pipe (6), a fifth metal sealing ring (95) is installed between the one end of the first manual angle valve (1) and the fuel outlet extension pipe (6), and the fuel outlet extension pipe (6) is covered with an outlet containing pipe (46); The first manual angle valve (1) is covered with an outer shell A (421) and an outer shell B (43); the outer shell A (421) is connected to a CF vacuum flange (422); the CF vacuum flange (422) is connected to the second manual angle valve (7); and a first metal sealing ring (91) is installed between the CF vacuum flange (422) and the second manual angle valve (7); The side end of the first manual angle valve (1) is connected to the fuel inlet extension pipe (5), a third metal sealing ring (93) is installed between the side end of the first manual angle valve (1) and the fuel inlet extension pipe (5), an inlet containing pipe A (44) is sleeved on the fuel inlet extension pipe (5), and the fuel inlet extension pipe (5) is connected to the inlet containing pipe B (451); The vacuum dynamic seal (2), the shaft connector containing pipe (41), the outer casing A (421), the outer casing B (43), the inlet containing pipe A (44), the inlet containing pipe B (451), the first manual angle valve (1), the interlayer bypass corrugated connection assembly (8) and the outlet containing pipe (46) constitute a secondary containing layer.

2. A vacuum isolation valve assembly with a double-layer containment structure as claimed in claim 1, characterized in that: The vacuum dynamic seal (2) is connected to a shaft connector (3), the vacuum dynamic seal (2) is connected to a shaft connector containing pipe (41), a second metal sealing ring (92) is installed between the vacuum dynamic seal (2) and the shaft connector containing pipe (41), the shaft connector (3) passes through the shaft connector containing pipe (41) and is connected to the first manual angle valve (1), the inlet containing pipe assembly B (452) is connected to the second CF vacuum flange (84), a fourth metal sealing ring (94) is arranged between the inlet containing pipe assembly B (452) and the second CF vacuum flange (84), the second CF vacuum flange (84) is connected to the bellows section (83), the bellows section (83) is connected to the curved pipe section (82), the curved pipe section (82) is connected to the first CF vacuum flange (81), the first CF vacuum flange (81) is connected to the side end of the second manual angle valve (7), and a first metal sealing ring (91) is installed between the first CF vacuum flange (81) and the second manual angle valve (7).

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