Cryogenic fluid handling arm

Abstract

The utility model belongs to low temperature loading and unloading equipment technical field discloses a kind of low temperature fluid loading and unloading arm, and specific technical solutions are as follows: including stand, first parking board and second parking board are installed on stand, the upper section of stand is also equipped with first purging replacement inlet, first purging replacement outlet, second purging replacement inlet, second purging replacement outlet, NG flange joint and LNG flange joint are installed on stand, NG flange joint is connected with gas-phase vertical pipe, first flange disc by multiple cryogenic rotary joints, LNG flange joint is connected with liquid-phase vertical pipe, second flange disc by multiple cryogenic rotary joints, the utility model is combined by multiple rotary joints and pipeline, pipeline accessory, balancing device, supporting mechanism and control operation system, for realizing the device between ground equipment and liquid tank car Transmission liquid and gas product, it is applicable to low temperature liquid loading and unloading, rotate flexible, satisfy the use range's alignment, sealing performance is good, can bear load is big, service life is long.

Description

Technical Field

[0001] This utility model belongs to the technical field of cryogenic loading and unloading equipment, specifically relating to a cryogenic fluid loading and unloading arm. Background Technology

[0002] Loading arms (or loading arms) are specialized equipment used in the petrochemical industry for loading and unloading fluids. They connect to rigid pipes and elbows via rotary joints to facilitate the transfer of liquid media between trains, tank cars, and storage / transport pipelines on rail bridges. This replaces older hose connections and offers high safety, flexibility, and long service life. Loading arms are ideal for oil loading and unloading processes and can also be widely used in the chemical industry and other sectors for loading and unloading various liquid raw materials.

[0003] When used in cryogenic liquid loading and unloading, ordinary ambient temperature loading arms and rotary joints lack protective devices. During cryogenic loading and unloading, moisture in the atmosphere inside the rotary joint can easily condense, causing the rotary joint to freeze and become unable to rotate, thus affecting the use of the equipment. In the current petrochemical and chemical production process, the types of corresponding by-products are increasing, and ordinary ambient temperature loading arms are difficult to meet the needs of modern production. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model provides a loading and unloading arm for handling cryogenic liquids, which is practical, flexible and reliable.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a cryogenic fluid loading and unloading arm, including a column, on which a first stop plate and a second stop plate are mounted.

[0006] The upper section of the column is also equipped with a first purging and replacement inlet and a first purging and replacement outlet. When the NG pipeline needs to be purged, the purging mode is switched, nitrogen is introduced through the first purging and replacement inlet to purge the entire NG pipeline, and nitrogen is recovered through the first purging and replacement outlet.

[0007] The lower section of the column is also equipped with a second purging and replacement inlet and a second purging and replacement outlet. When the LNG pipeline needs to be purged, the purging mode is switched, nitrogen is introduced through the second purging and replacement inlet to purge the entire LNG pipeline, and nitrogen is recovered through the second purging and replacement outlet.

[0008] The column is equipped with NG flange joints, which are connected in sequence to the first cryogenic rotary joint, the first main pipeline, the second cryogenic rotary joint, the first transfer pipeline, the third cryogenic rotary joint, the first delivery pipeline, the gas phase outer arm, the fourth cryogenic rotary joint, the fifth cryogenic rotary joint, the first connecting pipe, the first intermediate joint, the gas phase vertical pipe, and the first flange through pipelines. The first cryogenic rotary joint, the second cryogenic rotary joint, the third cryogenic rotary joint, the fourth cryogenic rotary joint, and the fifth cryogenic rotary joint are arranged in the NG pipeline. Cryogenic compensation technology is adopted to ensure the sealing performance and service life of the entire NG pipeline.

[0009] The column is equipped with an LNG flange joint, which is connected in sequence to the sixth cryogenic rotary joint, the second main pipeline, the seventh cryogenic rotary joint, the second transfer pipeline, the eighth cryogenic rotary joint, the second delivery pipeline, the ninth cryogenic rotary joint, the tenth cryogenic rotary joint, the second connecting pipe, the second intermediate joint, the liquid phase vertical pipe, and the second flange through pipelines. The sixth, seventh, eighth, ninth, and tenth cryogenic rotary joints are arranged in the LNG pipeline. Cryogenic compensation technology is adopted to ensure the sealing performance and service life of the entire LNG pipeline.

[0010] The device also includes a first fixing plate. The upper section of the first fixing plate is hinged to the cylinder rod end of the first spring cylinder via a first ear plate. A first support plate is fixed on the first adapter pipe. The upper section of the first support plate is provided with a first strip groove. The cylinder of the first spring cylinder is hinged in the first strip groove via a pin. The installation angle of the first connecting pipe is adjusted by the first spring cylinder.

[0011] The device also includes a second fixing plate. The upper section of the second fixing plate is hinged to the cylinder rod end of the second spring cylinder via a second ear plate. A second support plate is fixed on the second adapter pipe. The upper section of the second support plate is provided with a second strip groove. The cylinder of the second spring cylinder is hinged in the second strip groove via a pin. The installation angle of the second connecting pipe is adjusted by the second spring cylinder.

[0012] The gas phase outer arm is connected to the first electrostatic connector via a first electrostatic wire, and the liquid phase outer arm is connected to the second electrostatic connector via a second electrostatic wire to eliminate static electricity.

[0013] A first cryogenic shut-off valve, a second cryogenic shut-off valve, and a third cryogenic shut-off valve are connected between the first delivery pipeline and the gas phase vertical pipe. The opening and closing of the gas phase vertical pipe are controlled by the first cryogenic shut-off valve, the second cryogenic shut-off valve, and the third cryogenic shut-off valve.

[0014] The second delivery pipeline is connected to the liquid phase vertical pipe by a fourth, a fifth, and a sixth cryogenic shut-off valve, which control the opening and closing of the liquid phase vertical pipe.

[0015] Metal hoses are connected to the first purging and replacement inlet, the first purging and replacement outlet, the second purging and replacement inlet, and the second purging and replacement outlet. The metal hoses can increase the degree of freedom of connection and can realize multi-directional connection.

[0016] Compared with the prior art, the specific beneficial effects of this utility model are as follows: This utility model is a device for transferring liquid and gas products between ground equipment and liquid tank trucks. It is composed of multiple rotary joints, pipes, pipe accessories, balancing devices, support mechanisms and control operating systems. It is suitable for loading and unloading cryogenic liquids, rotates flexibly, meets the alignment requirements of the application range, has good sealing performance, can withstand large loads, and has a long service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0019] Figure 3 for Figure 1 A magnified view of a section at point B.

[0020] In the diagram, 1 is the column, 2 is the first docking plate, 3 is the second docking plate, 4 is the first purging and replacement inlet, 5 is the first purging and replacement outlet, 6 is the second purging and replacement inlet, 7 is the second purging and replacement outlet, 8 is the NG flange joint, 9 is the first cryogenic rotary joint, 10 is the first main pipeline, 11 is the second cryogenic rotary joint, 12 is the first transfer pipeline, 13 is the third cryogenic rotary joint, 14 is the first conveying pipeline, 15 is the gas phase outer arm, 16 is the fourth cryogenic rotary joint, 17 is the fifth cryogenic rotary joint, 18 is the first connecting pipe, 19 is the first intermediate joint, 20 is the gas phase vertical pipe, 21 is the first flange, 22 is the LNG flange joint, 23 is the sixth cryogenic rotary joint, 24 is the second main pipeline, 25 is the seventh cryogenic rotary joint, and 26 is the second transfer pipeline. Connecting pipes: 27 is the eighth cryogenic rotary joint, 28 is the second conveying pipe, 29 is the ninth cryogenic rotary joint, 30 is the tenth cryogenic rotary joint, 31 is the second connecting pipe, 32 is the second intermediate joint, 33 is the liquid phase vertical pipe, 34 is the second flange, 35 is the first fixing plate, 36 is the first ear plate, 37 is the first spring cylinder, 38 is the first support plate, 39 is the second fixing plate, 40 is the second ear plate, 41 is the second spring cylinder, 42 is the second support plate, 43 is the first static electricity conductor, 44 is the first static electricity connector, 45 is the second static electricity conductor, 46 is the second static electricity connector, 47 is the first cryogenic shut-off valve, 48 is the second cryogenic shut-off valve, 49 is the third cryogenic shut-off valve, 50 is the fourth cryogenic shut-off valve, 51 is the fifth cryogenic shut-off valve, and 52 is the sixth cryogenic shut-off valve. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] like Figure 1-3 As shown, a cryogenic fluid loading and unloading arm includes a column 1, on which a first docking plate 2 and a second docking plate 3 are mounted.

[0023] The upper section of column 1 is also equipped with a first purging and replacement inlet 4 and a first purging and replacement outlet 5. When the NG pipeline needs to be purged, the purging mode is switched, and nitrogen is introduced through the first purging and replacement inlet 4 to purge the entire NG pipeline and recover nitrogen through the first purging and replacement outlet 5.

[0024] The lower section of column 1 is also equipped with a second purging and replacement inlet 6 and a second purging and replacement outlet 7. When the LNG pipeline needs to be purged, the purging mode is switched, nitrogen is introduced through the second purging and replacement inlet 6 to purge the entire LNG pipeline, and nitrogen is recovered through the second purging and replacement outlet 7.

[0025] The column 1 is equipped with an NG flange joint 8. The NG flange joint 8 is connected in sequence to the first cryogenic rotary joint 9, the first main pipeline 10, the second cryogenic rotary joint 11, the first transition pipeline 12, the third cryogenic rotary joint 13, the first conveying pipeline 14, the gas phase outer arm 15, the fourth cryogenic rotary joint 16, the fifth cryogenic rotary joint 17, the first connecting pipe 18, the first intermediate joint 19, the gas phase vertical pipe 20, and the first flange 21 through pipelines. The first main pipeline 10 is fixed through the first inner arm. The first cryogenic rotary joint 9 is arranged perpendicular to the second cryogenic rotary joint 11. The fourth cryogenic rotary joint 16 and the fifth cryogenic rotary joint 17 are arranged perpendicularly. In the NG pipeline, the first cryogenic rotary joint 9, the second cryogenic rotary joint 11, the third cryogenic rotary joint 13, the fourth cryogenic rotary joint 16, and the fifth cryogenic rotary joint 17 are arranged. Cryogenic compensation technology is adopted to ensure the sealing performance and service life of the entire NG pipeline.

[0026] The column 1 is equipped with an LNG flange joint 22. The LNG flange joint 22 is connected in sequence to the sixth cryogenic rotary joint 23, the second main pipeline 24, the seventh cryogenic rotary joint 25, the second transfer pipeline 26, the eighth cryogenic rotary joint 27, the second conveying pipeline 28, the ninth cryogenic rotary joint 29, the tenth cryogenic rotary joint 30, the second connecting pipe 31, the second intermediate joint 32, the liquid phase vertical pipe 33, and the second flange 34 through pipelines. The second main pipeline 24 is fixed by the second inner arm. The sixth cryogenic rotary joint 23 is arranged perpendicular to the seventh cryogenic rotary joint 25, and the ninth cryogenic rotary joint 29 is arranged perpendicular to the tenth cryogenic rotary joint 30. In the LNG pipeline, the sixth cryogenic rotary joint 23, the seventh cryogenic rotary joint 25, the eighth cryogenic rotary joint 27, the ninth cryogenic rotary joint 29, and the tenth cryogenic rotary joint 30 are arranged. Cryogenic compensation technology is adopted to ensure the sealing performance and service life of the entire LNG pipeline.

[0027] The cryogenic rotary joint consists of an inner ring, outer ring, flanges (at both ends), main sealing ring, secondary sealing ring, nitrogen sealing ring, end face seal, steel balls, connecting bolts, and compression fittings. The rotary joint adopts a double-raceway high-sealing-performance structure, with high-precision bearings used in the raceways of the inner and outer rings, enabling 360-degree gapless and flexible rotation. The connection uses a double-flange structure for easy replacement of sealing rings or maintenance of the rotary joint body. The rotary joint material undergoes a cryogenic treatment process to minimize welding and machining residual stress, while also reducing deformation of the sealing surface. Each cryogenic rotary joint is a key component of the entire loading arm. Employing cryogenic compensation technology, the rotary joint maintains excellent sealing performance and flexible rotation within a temperature range of -196℃ to +120℃, resulting in a long service life.

[0028] By adding two small air inlets and outlets to the cryogenic rotary joint and continuously blowing nitrogen into it, the rotating parts of the cryogenic rotary joint are kept away from the atmosphere, thus preventing moisture in the air from adhering to and condensing on the cryogenic rotary joint. This enables cryogenic loading and unloading.

[0029] The device also includes a first fixing plate 35. The upper section of the first fixing plate 35 is hinged to the cylinder rod end of the first spring cylinder 37 via a first ear plate 36. A first support plate 38 is fixed on the first adapter pipe 12. The upper section of the first support plate 38 is provided with a first strip groove. The cylinder of the first spring cylinder 37 is hinged in the first strip groove via a pin. The installation angle of the first connecting pipe 18 is adjusted by extending and retracting the cylinder rod of the first spring cylinder 37.

[0030] The device also includes a second fixing plate 39. The upper section of the second fixing plate 39 is hinged to the cylinder rod end of the second spring cylinder 41 via a second ear plate 40. A second support plate 42 is fixed on the second adapter pipe 26. The upper section of the second support plate 42 is provided with a second strip groove. The cylinder of the second spring cylinder 41 is hinged in the second strip groove via a pin. The installation angle of the second connecting pipe 31 is adjusted by extending and retracting the cylinder rod of the second spring cylinder 41.

[0031] The gas phase outer arm 15 is connected to the first electrostatic connector 44 via the first electrostatic wire 43, and the liquid phase outer arm is connected to the second electrostatic connector 46 via the second electrostatic wire 45 to eliminate static electricity.

[0032] A first cryogenic shut-off valve 47, a second cryogenic shut-off valve 48, and a third cryogenic shut-off valve 49 are connected between the first delivery pipeline 14 and the gas phase vertical pipe 20. The opening and closing of the gas phase vertical pipe 20 are controlled by the first cryogenic shut-off valve 47, the second cryogenic shut-off valve 48, and the third cryogenic shut-off valve 49.

[0033] The second conveying pipeline 28 is connected to the liquid phase vertical pipe 33 by a fourth cryogenic shut-off valve 50, a fifth cryogenic shut-off valve 51, and a sixth cryogenic shut-off valve 52, which control the opening and closing of the liquid phase vertical pipe 33.

[0034] Metal hoses are connected to the first purging and replacement inlet 4, the first purging and replacement outlet 5, the second purging and replacement inlet 6, and the second purging and replacement outlet 7. The metal hoses can increase the degree of freedom of connection and can realize multi-directional connection.

[0035] This utility model is mainly applied to loading and unloading sites for cryogenic liquids such as LNG. This utility model is a device for transferring liquid and gas products between bottom equipment and liquid tank trucks. It is composed of multiple rotary joints, pipes, pipe accessories, balancing devices, support mechanisms and control operating systems. It is suitable for loading and unloading cryogenic liquids, has flexible rotation, good sealing performance, can withstand large loads and has a long service life.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model shall be included within the scope of the present utility model.

Claims

1. A cryogenic fluid loading and unloading arm, characterized in that, Includes a column (1), on which a first stop plate (2) and a second stop plate (3) are mounted; The upper section of the column (1) is also equipped with a first purging and replacement inlet (4) and a first purging and replacement outlet (5), and the lower section of the column (1) is also equipped with a second purging and replacement inlet (6) and a second purging and replacement outlet (7). The column (1) is equipped with an NG flange joint (8), which is connected in sequence to the first low-temperature rotary joint (9), the first main pipeline (10), the second low-temperature rotary joint (11), the first transfer pipeline (12), the third low-temperature rotary joint (13), the first conveying pipeline (14), the gas phase outer arm (15), the fourth low-temperature rotary joint (16), the fifth low-temperature rotary joint (17), the first connecting pipe (18), the first intermediate joint (19), the gas phase vertical pipe (20), and the first flange (21) through pipelines; The column (1) is equipped with an LNG flange joint (22), which is connected in sequence to the sixth cryogenic rotary joint (23), the second main pipeline (24), the seventh cryogenic rotary joint (25), the second transfer pipeline (26), the eighth cryogenic rotary joint (27), the second conveying pipeline (28), the ninth cryogenic rotary joint (29), the tenth cryogenic rotary joint (30), the second connecting pipe (31), the second intermediate joint (32), the liquid phase vertical pipe (33), and the second flange (34) through pipelines.

2. The cryogenic fluid loading and unloading arm according to claim 1, characterized in that, It also includes a first fixing plate (35), the upper section of which is hinged to the cylinder rod end of the first spring cylinder (37) via a first ear plate (36), a first support plate (38) is fixed on the first adapter pipe (12), the upper section of the first support plate (38) is provided with a first strip groove, and the cylinder of the first spring cylinder (37) is hinged in the first strip groove via a pin. It also includes a second fixing plate (39), the upper section of which is hinged to the cylinder rod end of the second spring cylinder (41) via a second ear plate (40), and a second support plate (42) is fixed on the second adapter pipe (26). The upper section of the second support plate (42) is provided with a second strip groove, and the cylinder of the second spring cylinder (41) is hinged in the second strip groove via a pin.

3. The cryogenic fluid loading and unloading arm according to claim 2, characterized in that, The gas phase outer arm (15) is connected to the first electrostatic connector (44) via a first electrostatic wire (43); the liquid phase outer arm is connected to the second electrostatic connector (46) via a second electrostatic wire (45).

4. A cryogenic fluid loading and unloading arm according to claim 3, characterized in that, A first cryogenic shut-off valve (47), a second cryogenic shut-off valve (48), and a third cryogenic shut-off valve (49) are connected between the first delivery pipeline (14) and the gas phase vertical pipe (20). The second delivery pipe (28) is connected to the liquid phase vertical pipe (33) by a fourth cryogenic shut-off valve (50), a fifth cryogenic shut-off valve (51) and a sixth cryogenic shut-off valve (52).

5. A cryogenic fluid loading and unloading arm according to claim 4, characterized in that, Metal hoses are connected to the first purging and replacement inlet (4), the first purging and replacement outlet (5), the second purging and replacement inlet (6), and the second purging and replacement outlet (7).

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