A detachable cryogenic fluid scabbard connection kit

Abstract

The present invention discloses a detachable low-temperature fluid scabbard connection kit, wherein the sword assembly comprises a sword tube and a connection sleeve, the outer wall of one end of the sword tube is provided with a self-tapping thread, the connection sleeve is arranged outside the sword tube away from the first sealing section, the connection sleeve is provided with a sealing installation groove extending around the sword tube in an annular manner on the side facing the first sealing section, the outer wall of the sealing installation groove is provided with an internal thread, the inner wall of one end of the sheath tube of the sheath assembly is provided with a sealing platform matched with the self-tapping thread, the inner radial direction of the sealing platform gradually decreases in the direction of the sheath tube, and the other end of the sheath tube is arranged corresponding to the sealing installation groove and is threadedly matched with the sealing installation groove. The detachable low-temperature fluid scabbard connection kit with the above-mentioned optimized design is combined with the sword assembly and the sheath assembly, and the sealing of the sealing ring at one end of the sword tube and the sheath tube is realized by threaded installation, and the metal sealing is realized by the self-tapping thread at the other end, thereby realizing fast installation, ensuring the sealing effect, and effectively controlling the heat leakage of the connection kit.

Description

Technical Field

[0001] The invention relates to the field of cryogenic pipelines in cryogenic engineering, and in particular to a detachable cryogenic fluid scabbard connection kit. Background Art

[0002] Cryogenic fluids generally refer to media with a saturation temperature below 120K. The fluid state is not limited to gas, liquid, and supercritical forms. The fluids are mainly liquid oxygen, liquid nitrogen, liquid hydrogen, and liquid helium, but are not limited to other cryogenic fluids.

[0003] The working pressure of cryogenic pipelines in cryogenic engineering is within a certain range, and the maximum working pressure is 150PSIG. Usually, cryogenic pipelines, also known as high-vacuum multi-layer insulated pipelines, are generally composed of a sword tube and an outer tube. The space formed between the sword tube and the outer tube is called an "interlayer". The interlayer is formed by wrapping multiple layers of insulating materials, and a high vacuum is established between the "interlayers". In the field of cryogenic engineering, cryogenic liquids (such as liquid oxygen, liquid nitrogen, liquid hydrogen and liquid helium, etc.) are transported to users in most cases using high-vacuum multi-layer insulated pipelines, especially liquid hydrogen and liquid helium when the critical temperature is low, and high-vacuum multi-layer insulated pipelines are indispensable during the transmission process. "Cold box" is a device used to produce cryogenic fluids. The cryogenic fluids produced by this "cold box" will be transported to users for use.

[0004] Therefore, the structure of high-vacuum multi-layer insulated pipelines is usually complex, so the cryogenic pipelines between the cold box (the output end of the cryogenic fluid) and the user end cannot be disassembled. If disassembly is required, it must be destructive. When the distance between the cold box and the user end is long, such as tens of meters or even hundreds of meters, the cryogenic pipeline at this time needs to be manufactured on site. For manufacturers of cryogenic pipelines, due to different production conditions, the efficiency of on-site production is much lower than the efficiency of factory production. The same disassembly and assembly problem mentioned in the previous item also exists. At the same time, since the saturation temperature of the cryogenic fluid is much lower than the ambient temperature, the detachable connection also needs to solve its own heat leakage problem. The common docking method will cause a large heat leakage, which will cause the temperature rise of the cryogenic fluid or the loss of the cryogenic liquid. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes a detachable low-temperature fluid scabbard connection kit.

[0006] The present invention provides a detachable low-temperature fluid sword and scabbard connection kit, comprising: a sword component and a scabbard component;

[0007] The sword assembly includes a sword tube and a connecting sleeve, a first sealing section is provided at one end of the sword tube, a self-tapping thread is provided on the outer wall of the first sealing section, the connecting sleeve is arranged outside the sword tube away from the first sealing section, a sealing installation groove is provided on the side of the connecting sleeve facing the first sealing section and extending around the sword tube in an annular manner, a sealing ring is provided in the sealing installation groove, the sealing ring is arranged against the inner side wall of the sealing installation groove, and an inner thread is provided on the outer side wall of the sealing installation groove;

[0008] The sheath assembly includes a sheath tube, and a second sealing section and a connecting section are respectively provided at both ends of the sheath tube. The inner wall of the second sealing section is provided with a sealing platform that cooperates with the self-tapping thread of the first sealing section, and the inner radial direction of the sealing platform gradually decreases in the direction of the sheath tube. The connecting section is arranged corresponding to the sealing installation groove, and the outer wall of the connecting section is provided with an external thread that cooperates with the sealing installation groove through an internal thread.

[0009] Preferably, a nose sleeve is provided on the rapier tube, the nose sleeve is welded to one end of the rapier tube away from the connecting sleeve, and a self-tapping thread is provided on the outer wall of the nose sleeve.

[0010] Preferably, the connecting sleeve includes a connector and a nut, the connector is welded to the outer wall of the sword tube, the outer wall of the connector is provided with a first limiting protrusion and a second limiting protrusion, the first limiting protrusion and the second limiting protrusion are arranged in a ring on the outer wall of the connector in sequence, the nut sleeve is arranged on the outside of the connector and forms a sealing installation groove with the connector, the inner wall of the nut is provided with a ring-shaped clamping protrusion, and the clamping protrusion is located between the first limiting protrusion and the second limiting protrusion.

[0011] Preferably, a first snap ring and a second snap ring are further provided on the connector, and a first snap groove for accommodating the first snap ring and a second snap groove for accommodating the second snap ring are provided on the outer wall of the connector.

[0012] Preferably, the outer wall of the connector is further provided with a sealing groove for accommodating a sealing ring.

[0013] Preferably, a nose rotary seat is provided at one end of the second sealing section of the sheath tube, and the sealing platform is arranged on the inner wall of the nose rotary seat.

[0014] Preferably, the nose rotor and the sheath are coaxially arranged.

[0015] Preferably, the nose rotor is fixed to the sheath tube by welding.

[0016] In the present invention, the proposed detachable cryogenic fluid scabbard connection kit, the sword assembly includes a sword tube and a connection sleeve, the outer wall of one end of the sword tube is provided with a self-tapping thread, the connection sleeve is arranged outside the sword tube away from the first sealing section, the connection sleeve is provided with a sealing installation groove extending around the sword tube in an annular manner on the side facing the first sealing section, the outer wall of the sealing installation groove is provided with an internal thread, the inner wall of one end of the sheath tube of the sheath assembly is provided with a sealing platform matched with the self-tapping thread, the inner radial direction of the sealing platform gradually decreases in the direction of the sheath tube, and the other end of the sheath tube is arranged corresponding to the sealing installation groove and is threadedly matched with the sealing installation groove. Through the above-mentioned optimized detachable cryogenic fluid scabbard connection kit, through the combined design of the sword assembly and the sheath assembly, the sealing of the sealing ring at one end of the sword tube and the sheath tube is realized by threaded installation, and the metal sealing is realized by the self-tapping thread at the other end, thereby realizing fast installation, ensuring the sealing effect, and effectively controlling the heat leakage of the connection kit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a scabbard assembly of a detachable cryogenic fluid scabbard connection kit proposed by the present invention.

[0018] Figure 2 A schematic structural diagram of a sword assembly of a detachable cryogenic fluid scabbard connection kit proposed by the present invention.

[0019] Figure 3 A schematic diagram of the structure of a detachable cryogenic fluid scabbard connection kit proposed by the present invention. DETAILED DESCRIPTION

[0020] like Figures 1 to 3 As shown, Figure 1 This is a schematic structural diagram of a detachable sheath assembly of a cryogenic fluid scabbard connection kit proposed by the present invention. Figure 2 This is a schematic diagram of the structure of a sword assembly of a detachable cryogenic fluid scabbard connection kit proposed by the present invention. Figure 3 A schematic diagram of the structure of a detachable cryogenic fluid scabbard connection kit proposed by the present invention.

[0021] Reference Figures 1 to 3 , the present invention proposes a detachable cryogenic fluid sword and scabbard connection kit, comprising: a sword component and a scabbard component;

[0022] The sword assembly includes a sword tube 1 and a connecting sleeve. A first sealing section is provided at one end of the sword tube 1. The outer wall of the first sealing section is provided with a self-tapping thread. The connecting sleeve is arranged outside the sword tube 1 away from the first sealing section. A sealing installation groove extending in an annular manner around the sword tube 1 is provided on the side of the connecting sleeve facing the first sealing section. A sealing ring 3 is provided in the sealing installation groove. The sealing ring 3 is arranged against the inner side wall of the sealing installation groove. The outer side wall of the sealing installation groove is provided with an internal thread.

[0023] The sheath assembly includes a sheath tube 2, and a second sealing section and a connecting section are respectively provided at both ends of the sheath tube 2. The inner wall of the second sealing section is provided with a sealing platform that cooperates with the self-tapping thread of the first sealing section. The inner radial direction of the sealing platform gradually decreases in the direction of the sheath tube 2. The connecting section is arranged corresponding to the sealing installation groove, and the outer wall of the connecting section is provided with an external thread that cooperates with the sealing installation groove through an internal thread.

[0024] During the specific installation process of the detachable low-temperature fluid scabbard connection kit of the present embodiment, one end of the first sealing section of the dagger tube is inserted into the sheath tube from one end of the sheath tube connection end, and the connecting sleeve of the dagger tube is inserted into the sealing installation groove of the sheath tube connection section. The sheath tube connection section and the dagger tube connecting sleeve are installed through threads, so that the sealing ring is deformed and sealed between the connecting sleeve and the connection part. During this process, the first sealing section of the dagger tube taps the sealing platform of the second sealing section of the sheath tube through self-tapping threads to achieve metal sealing between the two.

[0025] In the present embodiment, the proposed detachable cryogenic fluid scabbard connection kit, the sword assembly includes a sword tube and a connection sleeve, the outer wall of one end of the sword tube is provided with a self-tapping thread, the connection sleeve is arranged outside the sword tube away from the first sealing section, the connection sleeve is provided with a sealing installation groove extending around the sword tube in an annular manner on the side facing the first sealing section, the outer wall of the sealing installation groove is provided with an internal thread, the inner wall of one end of the sheath tube of the sheath assembly is provided with a sealing platform matched with the self-tapping thread, the inner radial direction of the sealing platform gradually decreases in the direction of the sheath tube, and the other end of the sheath tube is arranged corresponding to the sealing installation groove and is threadedly matched with the sealing installation groove. Through the above-mentioned optimized detachable cryogenic fluid scabbard connection kit, through the combined design of the sword assembly and the sheath assembly, the sealing of the sealing ring at one end of the sword tube and the sheath tube is realized through threaded installation, and the metal sealing is realized at the other end through the self-tapping thread, thereby achieving fast installation, ensuring the sealing effect, and effectively controlling the heat leakage of the connection kit.

[0026] In a specific embodiment of the sword assembly, a nose sleeve 8 is provided on the sword tube 1 , the nose sleeve 8 is welded to the end of the sword tube 1 away from the connecting sleeve, and a self-tapping thread is provided on the outer wall of the nose sleeve 8 .

[0027] In other specific embodiments, the connecting sleeve includes a connector 5 and a nut 6, the connector 5 is welded to the outer wall of the sword tube 1, the outer wall of the connector 5 is provided with a first limiting protrusion and a second limiting protrusion, the first limiting protrusion and the second limiting protrusion are arranged in a ring on the outer wall of the connector 5 in sequence, the nut 6 is sleeved on the outside of the connector 5 and forms a sealed installation groove with the connector 5, the inner wall of the nut 6 is provided with a ring-shaped clamping protrusion, the clamping protrusion is located between the first limiting protrusion and the second limiting protrusion; the nut is clamped between the first limiting protrusion and the second limiting protrusion by the clamping protrusion to ensure installation reliability.

[0028] In a further specific embodiment, the connector 5 is further provided with a first snap ring 71 and a second snap ring 72, and the outer wall of the connector 5 is provided with a first groove for accommodating the first snap ring 71 and a second groove for accommodating the second snap ring 72; in the specific installation process, the second snap ring close to the sealing ring side is first installed in the second groove, and then the nut is put on the outside of the connector, and finally the first snap ring is clamped in the first groove, so that the snap-in protrusion of the nut is limited from both sides by the first snap ring and the second snap ring.

[0029] In the specific installation method of the sealing ring, the outer wall of the connector 5 is also provided with a sealing groove for accommodating the sealing ring; the sealing ring is limited by the sealing groove to ensure the reliability of the seal.

[0030] In a specific design of the sheath assembly, a nose rotary seat 4 is provided at one end of the second sealing section of the sheath tube 2 , and the sealing platform is arranged on the inner wall of the nose rotary seat 4 .

[0031] In a specific implementation, the nose screw seat 4 and the sheath tube 2 are coaxially arranged. In a specific installation method, the nose screw seat 4 and the sheath tube 2 are welded and fixed.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A detachable cryogenic fluid scabbard connection kit, characterized in that: include: Sword assembly and scabbard assembly; The sword assembly comprises a sword tube (1) and a connecting sleeve, wherein a first sealing section is provided at one end of the sword tube (1), the outer wall of the first sealing section is provided with a self-tapping thread, the connecting sleeve is arranged outside the sword tube (1) away from the first sealing section, and a sealing installation groove is provided on the side of the connecting sleeve facing the first sealing section and extending in an annular manner around the sword tube (1), a sealing ring (3) is provided in the sealing installation groove, the sealing ring (3) is arranged against the inner side wall of the sealing installation groove, and the outer side wall of the sealing installation groove is provided with an internal thread; The sheath assembly comprises a sheath tube (2), wherein two ends of the sheath tube (2) are respectively provided with a second sealing section and a connecting section, the inner wall of the second sealing section is provided with a sealing platform that cooperates with the self-tapping thread of the first sealing section, the inner radial direction of the sealing platform in the direction of the sheath tube (2) gradually decreases, the connecting section is arranged correspondingly to the sealing installation groove, and the outer wall of the connecting section is provided with an external thread that cooperates with the sealing installation groove through an internal thread; The connecting sleeve comprises a connector (5) and a nut (6), the connector (5) is welded to the outer wall of the sword tube (1), the outer wall of the connector (5) is provided with a first limiting protrusion and a second limiting protrusion, the first limiting protrusion and the second limiting protrusion are sequentially arranged in an annular manner on the outer wall of the connector (5), the nut (6) is sleeved on the outside of the connector (5) and forms a sealing installation groove with the connector (5), the inner wall of the nut (6) is provided with an annularly arranged clamping protrusion, and the clamping protrusion is located between the first limiting protrusion and the second limiting protrusion; The connector (5) is also provided with a first snap ring (71) and a second snap ring (72); the outer wall of the connector (5) is provided with a first snap groove for accommodating the first snap ring (71) and a second snap groove for accommodating the second snap ring (72).

2. The detachable cryogenic fluid scabbard connection kit according to claim 1, characterized in that: A nose sleeve (8) is provided on the sword tube (1), the nose sleeve (8) is welded to an end of the sword tube (1) away from the connecting sleeve, and a self-tapping thread is provided on the outer wall of the nose sleeve (8).

3. The detachable cryogenic fluid scabbard connection kit according to claim 1, characterized in that: The outer wall of the connector (5) is also provided with a sealing groove for accommodating the sealing ring (3).

4. The detachable cryogenic fluid scabbard connection kit according to claim 1, characterized in that: A nose rotary seat (4) is provided at one end of the second sealing section of the sheath tube (2), and the sealing platform is arranged on the inner wall of the nose rotary seat (4).

5. The detachable cryogenic fluid scabbard connection kit according to claim 4, characterized in that: The nose rotating seat (4) and the sheath tube (2) are coaxially arranged.

6. The detachable cryogenic fluid scabbard connection kit according to claim 4, characterized in that: The nose rotating seat (4) is fixed to the sheath tube (2) by welding.

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