A main seal device for a liquid ammonia loading and unloading arm

Abstract

The utility model belongs to liquid ammonia loading and unloading arm technical field especially relates to a kind of liquid ammonia loading and unloading arm main sealing device, including liquid ammonia pipeline, the liquid ammonia pipeline is L-shaped, damping ring is fixedly sheathed on the liquid ammonia pipeline, fixed ring is rotatably sheathed on the liquid ammonia pipeline, the damping ring is connected with fixed ring damping rotation, the rear end of the fixed ring is fixedly connected with fixed circular ring plate, the rear end of the fixed circular ring plate is fixedly connected with first threaded tube.The advantage is that:when the outer sleeve pipe is screwed on the first threaded tube in the utility model, the inner sealing ring is in contact with the movable sealing ring, and the movable sealing ring is tightly attached to the inner sealing ring through the spring, forming a bidirectional seal, and a seal is formed by the outer sealing ring when screwing, after connecting the loading and unloading arm, when carrying out the loading and unloading liquid ammonia work, the vertical angle of the connecting joint can be adjusted by rotating the liquid ammonia pipeline to adapt to the interface position of different specifications of storage tank or transport vehicle, and the adaptability is wide.

Description

Technical Field

[0001] This utility model relates to the field of liquid ammonia loading and unloading arm technology, and in particular to a main sealing device for a liquid ammonia loading and unloading arm. Background Technology

[0002] Liquid ammonia is a colorless liquid with a pungent odor formed by compressing and liquefying ammonia gas at low temperatures. The boiling point of liquid ammonia is approximately -33.34°C at normal pressure, therefore it requires a low-temperature environment to remain liquid. Liquid ammonia is widely used in agriculture, chemical industry, refrigeration, and manufacturing.

[0003] A liquid ammonia loading boom is a piece of equipment used for loading and unloading liquid ammonia, commonly found in fertilizer plants, tank farms, and chemical processing facilities. Its main function is to safely and efficiently transfer liquid ammonia from storage tanks or transport vehicles (such as tank trucks) to storage tanks or equipment, or vice versa. The boom section of the liquid ammonia loading boom is typically telescopic and rotatable to reach storage tanks or tank trucks at different locations. The boom may be equipped with a liquid ammonia flow control device and a safety valve. Existing liquid ammonia loading booms use a fixed connection at the joint via a sealing device. Although the boom can telescopic and rotatable, the vertical angle of the joint is fixed and cannot be adjusted according to the interface position of the storage tank or transport vehicle, which is a significant limitation.

[0004] To address the aforementioned issues, we propose a main sealing device for a liquid ammonia loading and unloading arm. Utility Model Content

[0005] The purpose of this utility model is to solve the problems in the background art by proposing a main sealing device for a liquid ammonia loading and unloading arm.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a main sealing device for a liquid ammonia loading and unloading arm, comprising a liquid ammonia pipeline, the liquid ammonia pipeline being L-shaped, a damping ring being fixedly sleeved on the liquid ammonia pipeline, a fixed ring being rotatably sleeved on the liquid ammonia pipeline, the damping ring and the fixed ring being connected in a damping rotatable manner, a fixed circular ring plate being fixedly connected to the rear end of the fixed ring, and a first threaded pipe being fixedly connected to the rear end of the fixed circular ring plate.

[0007] In the above-mentioned main sealing device for a liquid ammonia loading and unloading arm, a movable ring is slidably and rotatably sleeved on the liquid ammonia pipeline, a spring is provided between the first threaded pipe and the movable ring, one end of the spring is fixedly connected to the first threaded pipe and the other end is fixedly connected to the movable ring, and a movable sealing ring is fixedly connected to the rear end of the movable ring.

[0008] In the above-mentioned main sealing device for a liquid ammonia loading and unloading arm, an outer sleeve is provided outside the first threaded pipe, and the inner wall of the outer sleeve is threaded, and the outer sleeve is threadedly screwed onto the first threaded pipe.

[0009] In the above-mentioned main sealing device for a liquid ammonia loading and unloading arm, an inner sealing ring is fixedly connected to the inner wall of the outer sleeve near the movable sealing ring.

[0010] In the above-mentioned main sealing device for a liquid ammonia loading and unloading arm, an outer sealing ring is fixedly connected to the rear end of the outer sleeve, and a second threaded pipe is connected to the rear end of the outer sleeve.

[0011] In the above-mentioned main sealing device for a liquid ammonia loading and unloading arm, a connecting joint is provided at the front end of the liquid ammonia pipeline, and a rotary valve is provided on the connecting joint.

[0012] Compared with existing technologies, the advantages of this liquid ammonia loading and unloading arm main sealing device are:

[0013] When the outer sleeve is threaded onto the first threaded pipe, the inner sealing ring contacts the movable sealing ring, and the movable sealing ring is tightly fitted with the inner sealing ring through a spring, forming a bidirectional seal. The entire device is threaded onto the loading and unloading arm through the second threaded pipe, and a seal is formed through the outer sealing ring when the thread is tightened. After being connected to the loading and unloading arm, when loading and unloading liquid ammonia, the liquid ammonia pipeline can be rotated to adjust the vertical angle of the connection joint to adapt to the interface position of different specifications of storage tanks or transport vehicles, making it highly adaptable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main sealing device for a liquid ammonia loading and unloading arm proposed in this utility model;

[0015] Figure 2 This is a cross-sectional view of the outer sleeve in the main sealing device of the liquid ammonia loading and unloading arm proposed in this utility model.

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Liquid ammonia pipeline, 2. Fixed ring, 3. Damping ring, 4. Fixed circular ring plate, 5. First threaded pipe, 6. Spring, 7. Movable ring, 8. Movable sealing ring, 9. Outer sleeve, 10. Inner sealing ring, 11. Outer sealing ring, 12. Second threaded pipe, 13. Connecting joint, 14. Rotary valve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1-3A main sealing device for a liquid ammonia loading and unloading arm includes a liquid ammonia pipeline 1, which is made of stainless steel and has high corrosion resistance. The liquid ammonia pipeline 1 is L-shaped. A damping ring 3 is fixedly fitted on the liquid ammonia pipeline 1, and a fixed ring 2 is rotatably fitted on the liquid ammonia pipeline 1. The damping ring 3 and the fixed ring 2 are connected in a damping rotatable manner. A connecting joint 13 is provided at the front end of the liquid ammonia pipeline 1, and a rotary valve 14 is provided on the connecting joint 13. The vertical angle of the connecting joint 13 can be adjusted by rotating the liquid ammonia pipeline 1, and the damping ring 3 can keep the connecting joint 13 at the adjusted angle. A fixed circular ring plate 4 is fixedly connected to the rear end of the fixed ring 2, and a first threaded pipe 5 is fixedly connected to the rear end of the fixed circular ring plate 4.

[0020] A movable ring 7 is slidably and rotatably fitted onto the liquid ammonia pipeline 1. A spring 6 is provided between the first threaded pipe 5 and the movable ring 7. One end of the spring 6 is fixedly connected to the first threaded pipe 5, and the other end is fixedly connected to the movable ring 7. A movable sealing ring 8 is fixedly connected to the rear end of the movable ring 7. An outer sleeve 9 is provided outside the first threaded pipe 5. The inner wall of the outer sleeve 9 is threaded. The outer sleeve 9 is threaded and tightened onto the first threaded pipe 5. An inner sealing ring 10 is fixedly connected to the inner wall of the outer sleeve 9 near the movable sealing ring 8. When the outer sleeve 9 is threaded onto the first threaded pipe 5, the inner sealing ring 10 contacts the movable sealing ring 8, and the movable sealing ring... 8 is tightly fitted with the inner sealing ring 10 by the spring 6 to form a two-way seal. The outer sealing ring 11 is fixedly connected to the rear end of the outer sleeve 9. The rear end of the outer sleeve 9 is connected to the second threaded pipe 12. The entire device is threadedly connected to the loading and unloading arm through the second threaded pipe 12. When the thread is tightened, a seal is formed by the outer sealing ring 11. After being connected to the loading and unloading arm, when loading and unloading liquid ammonia, the vertical angle of the connecting joint 13 can be adjusted by rotating the liquid ammonia pipeline 1. The connecting joint 13 can be stopped at the adjusted angle by the damping ring 3 to adapt to the interface position of different specifications of storage tanks or transport vehicles, with wide adaptability.

[0021] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A main sealing device for a liquid ammonia loading and unloading arm, comprising a liquid ammonia pipeline (1), characterized in that, The liquid ammonia pipeline (1) is L-shaped. A damping ring (3) is fixedly sleeved on the liquid ammonia pipeline (1). A fixed ring (2) is rotatably sleeved on the liquid ammonia pipeline (1). The damping ring (3) and the fixed ring (2) are connected in a damping rotational connection. A fixed circular ring plate (4) is fixedly connected to the rear end of the fixed ring (2). A first threaded pipe (5) is fixedly connected to the rear end of the fixed circular ring plate (4).

2. The main sealing device for a liquid ammonia loading and unloading arm according to claim 1, characterized in that, A movable ring (7) is slidably and rotatably fitted on the liquid ammonia pipeline (1). A spring (6) is provided between the first threaded pipe (5) and the movable ring (7). One end of the spring (6) is fixedly connected to the first threaded pipe (5) and the other end is fixedly connected to the movable ring (7). A movable sealing ring (8) is fixedly connected to the rear end of the movable ring (7).

3. The main sealing device for a liquid ammonia loading and unloading arm according to claim 1, characterized in that, The first threaded tube (5) is provided with an outer sleeve (9), the inner wall of the outer sleeve (9) is provided with threads, and the outer sleeve (9) is threadedly screwed onto the first threaded tube (5).

4. The main sealing device for a liquid ammonia loading and unloading arm according to claim 3, characterized in that, An inner sealing ring (10) is fixedly connected to the inner wall of the outer sleeve (9) near the movable sealing ring (8).

5. The main sealing device for a liquid ammonia loading and unloading arm according to claim 3, characterized in that, An outer sealing ring (11) is fixedly connected to the rear end of the outer sleeve (9), and a second threaded pipe (12) is connected to the rear end of the outer sleeve (9).

6. The main sealing device for a liquid ammonia loading and unloading arm according to claim 1, characterized in that, The liquid ammonia pipeline (1) is provided with a connecting joint (13) at its front end, and a rotary valve (14) is provided on the connecting joint (13).

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