Leak-proof structure for front end of swivel

Abstract

The utility model relates to a crane pipe technical field especially relates to a crane pipe front end anti -leak structure, including crane pipe main pipe, the outer surface lower part of crane pipe main pipe is fixedly connected with upper fixed flange structure and sealing connection seat in proper order from top to bottom, the lower part of crane pipe main pipe is provided with the butt joint pipe, the outer surface lower part of butt joint pipe is fixedly connected with the groove car self -adaptation interface subassembly, the outer surface upper part of butt joint pipe is fixedly connected with butt joint flange plate, the upper end of butt joint flange plate is provided with three upper and lower through -going insertion hole, the crane pipe front end anti -leak structure of the utility model, through sealing insertion tube and annular sealing washer form double seal, promote crane pipe front end sealing reliability, groove car self -adaptation interface subassembly adapts different specifications groove car interface, reduces the risk of leakage, reduces equipment investment cost, guarantees loading and unloading operation safe and efficient, gives consideration to environmental protection and economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of loading arm technology, and in particular to a leak-proof structure for the front end of a loading arm. Background Technology

[0002] Loading arms, as specialized equipment for loading and unloading liquids in industries such as petroleum and chemical processing, have a critical interface for liquid transfer at their front end, where they connect to tank cars and storage tanks. This interface is also a high-risk area for leaks. Existing anti-leakage structures for loading arms have significant shortcomings. On the one hand, their sealing performance is greatly affected by operating conditions. High temperatures and corrosive media can accelerate the aging and corrosion of seals, leading to failure. Misalignment during docking can also cause incomplete sealing. On the other hand, different types of tank cars (such as railway tank cars and road tank cars) may have different interface specifications, and some anti-leakage structures have fixed designs, making it difficult to adapt to multiple interface types. Utility Model Content

[0003] The main purpose of this utility model is to provide a leakage-proof structure for the front end of an arm-loading device, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A leak-proof structure for the front end of an loading arm includes a main loading arm. A top fixed flange structure and a sealing connection seat are sequentially and fixedly connected from top to bottom on the lower outer surface of the main loading arm. A connecting pipe is located below the main loading arm. A tank truck adaptive interface assembly is sequentially and fixedly connected to the lower outer surface of the connecting pipe. A mating flange is sequentially and fixedly connected to the upper outer surface of the connecting pipe. The upper end of the mating flange has three through-holes. Three locking bolts are movably connected to the annular array of threads on the outer surface of the mating flange. An annular sealing gasket is fixedly connected to the upper end of the mating flange. A sealing insert is fixedly connected to the middle of the upper end of the mating flange, and the sealing insert communicates with the interior of the connecting pipe.

[0006] Preferably, the diameter area of ​​the sealing tube is equal to the inner diameter area of ​​the main loading arm, the sealing tube is inserted into the lower part of the main loading arm, and the mating flange is inserted into the lower end of the sealing connection seat through an annular sealing gasket, the inner diameter area of ​​the annular sealing gasket is equal to the outer diameter area of ​​the main loading arm.

[0007] Preferably, the sealing connector includes an annular seat body, and three connecting lugs are fixedly connected in an annular array at the lower end of the annular seat body. Each of the three connecting lugs has an insertion groove at its lower end, and each of the three connecting lugs has a through locking screw hole on the side of each connecting lug that is far away from each other.

[0008] Preferably, the annular seat is inserted and fixedly connected to the lower part of the outer surface of the loading arm main tube, and the three connecting lugs are respectively inserted into the docking flange through three insertion slots and three insertion holes. The three connecting lugs are respectively detachably connected to the docking flange through three locking screw holes and three locking bolts.

[0009] Preferably, the tank truck adaptive interface assembly includes an interface flange ring block, which is inserted and fixedly connected to the lower part of the outer surface of the connecting pipe. Springs are fixedly connected to both the left and right sides of the outer surface of the interface flange ring block. Arc-shaped claws are fixedly connected to the ends of the two springs away from the interface flange ring block, and pressing handles are fixedly connected to the upper middle parts of the two arc-shaped claws.

[0010] Preferably, the two arc-shaped claws are arranged in a left-right mirror image, and the arc-shaped claws have a semi-arc structure.

[0011] Preferably, the two arc-shaped claws and the lower part of the connecting pipe are located together inside the tank truck's oil pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In this utility model, the sealing insert is inserted into the main pipe of the loading arm to match the inner diameter, forming an inner seal. The mating flange is inserted into the sealing connection seat through an annular sealing gasket. The inner diameter of the annular sealing gasket is adapted to the outer diameter of the main pipe of the loading arm to form an outer double seal, which can enhance the sealing effect and reduce the risk of media leakage. The connecting ear plate of the upper fixed flange structure is matched with the insertion hole of the mating flange through the insertion groove, and then fixed by the locking screw hole and the locking bolt. The mating deviation can be finely adjusted to ensure that the sealing element fits tightly, improve the sealing reliability, and the detachable connection facilitates maintenance and replacement, extending the service life of the equipment.

[0014] 2. In this utility model, in the tank truck adaptive interface assembly, the interface flange ring block is fixed on the docking pipe, providing stable support for the overall structure. The arc-shaped claws connected by springs on both sides are in a mirror semi-arc shape, which can flexibly extend and retract according to the specifications of the tank truck interface, closely fitting the inner wall of the oil pipe of different sizes of tank trucks, ensuring reliable sealing at the docking point. The press-to-lift handle allows operators to quickly load and unload, improving operational convenience. This combination allows the structure to adapt to various tank truck interfaces, eliminating the need for frequent replacement of special parts, reducing equipment investment, while ensuring a stable docking, reducing the risk of leakage, and improving loading and unloading efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the anti-leakage structure at the front end of the loading arm according to the present invention;

[0016] Figure 2This is a schematic cross-sectional view of the separation relationship between the main pipe and the connecting pipe of the loading arm, which is a leakage prevention structure at the front end of the loading arm according to this utility model.

[0017] Figure 3 This is a schematic diagram of the upper fixed flange structure of the anti-leakage structure at the front end of the loading arm according to this utility model;

[0018] Figure 4 This is a schematic diagram showing the connection between the butt joint of the anti-leakage structure at the front end of the loading arm and the adaptive interface component of the tank truck according to this utility model.

[0019] In the diagram: 1. Loading arm main pipe; 2. Upper fixed flange structure; 3. Sealing connection seat; 4. Butt joint pipe; 5. Tank car adaptive interface assembly; 6. Butt flange; 7. Insertion hole; 8. Locking bolt; 9. Sealing insert; 10. Annular sealing gasket; 21. Annular seat body; 22. Connecting ear plate; 23. Insertion groove; 24. Locking bolt hole; 51. Interface flange ring block; 52. Spring; 53. Arc-shaped claw; 54. Press handle block. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] A leak-proof structure for the front end of an loading arm includes a main loading arm 1. A top fixed flange structure 2 and a sealing connection seat 3 are sequentially and fixedly connected from top to bottom on the lower outer surface of the main loading arm 1. A connecting pipe 4 is located below the main loading arm 1. A tank truck adaptive interface assembly 5 is sequentially and fixedly connected to the lower outer surface of the connecting pipe 4. A docking flange 6 is sequentially and fixedly connected to the upper outer surface of the connecting pipe 4. Three through-holes 7 are opened at the upper end of the docking flange 6. Three locking bolts 8 are movably connected to the annular array of threads on the outer surface of the docking flange 6. An annular sealing gasket 10 is fixedly connected to the upper end of the docking flange 6. A sealing insert 9 is fixedly connected to the middle of the upper end of the docking flange 6, and the sealing insert 9 communicates with the interior of the connecting pipe 4.

[0025] In this embodiment, the diameter area of ​​the sealing tube 9 is equal to the inner diameter area of ​​the main loading arm 1. The sealing tube 9 is inserted into the lower part of the main loading arm 1. The docking flange 6 is inserted into the lower end of the sealing connection seat 3 through the annular sealing gasket 10. The inner diameter area of ​​the annular sealing gasket 10 is equal to the outer diameter area of ​​the main loading arm 1. The upper fixed flange structure 2 includes an annular seat 21. The lower end of the annular seat 21 is fixedly connected with three connecting lugs 22 in an annular array. The lower end of each of the three connecting lugs 22 is provided with a insertion groove 23. Each of the three connecting lugs 22 has a through locking screw hole 24 on the side of the three connecting lugs 22 that is far away from each other. The annular seat 21 is inserted and fixedly connected to the lower part of the outer surface of the main loading arm 1. The three connecting lugs 22 are respectively inserted into the docking flange 6 through the three insertion grooves 23 and the three insertion holes 7. The three connecting lugs 22 are respectively detachably connected to the docking flange 6 through the three locking screw holes 24 and the three locking bolts 8.

[0026] Through the above scheme: the sealing tube 9 is inserted into the main pipe of the loading arm with matching inner diameter to form an inner seal. The mating flange 6 is inserted into the sealing connection seat 3 through the annular sealing gasket 10. The inner diameter of the annular sealing gasket 10 is adapted to the outer diameter of the main pipe of the loading arm to form an outer double seal. The double seal reduces the erosion of a single seal by high temperature and corrosive media. The connecting ear plate 22 of the upper fixed flange structure 2 is matched with the insertion hole 7 of the mating flange 6 through the insertion groove 23, and then fixed with the locking bolt 8 through the locking screw hole 24. It can adaptively and finely adjust the mating misalignment to ensure the seal fits. This structure improves the sealing reliability, extends the seal life, and reduces leakage caused by operating conditions.

[0027] In this embodiment, the tank truck adaptive interface component 5 includes an interface flange ring block 51. The interface flange ring block 51 is inserted and fixedly connected to the lower part of the outer surface of the connecting pipe 4. Springs 52 are fixedly connected to the left and right sides of the outer surface of the interface flange ring block 51. Arc-shaped claws 53 are fixedly connected to the ends of the two springs 52 away from the interface flange ring block 51. Pressing handles 54 are fixedly connected to the middle of the upper ends of the two arc-shaped claws 53. The two arc-shaped claws 53 are distributed in a left-right mirror image. The arc-shaped claws 53 have a semi-arc structure. The two arc-shaped claws 53 and the lower part of the connecting pipe 4 are located inside the tank truck oil pipe.

[0028] The above solution involves: the interface flange ring block 51 being inserted and fixed to the lower part of the outer surface of the connecting pipe 4; the two sides of the flange ring block 51 are connected to the arc-shaped claws 53 by springs 52; the two arc-shaped claws 53 are mirror semi-arcs and are located inside the tank car oil pipe; the springs 52 can extend and retract according to different tank car interface specifications, so that the arc-shaped claws 53 can adaptively fit the inner wall of the interface; and the pressing handle 54 facilitates operation. This overcomes the limitations of fixed design and allows for elastic adjustment of the springs 52 to adapt to different tank car interfaces such as railway and highway vehicles. No special loading arm is required, reducing equipment investment and improving the versatility and efficiency of loading and unloading.

[0029] It should be noted that this utility model is a leakage-proof structure for the front end of an loading arm. During use, firstly, the main loading arm 1 and the connecting pipe 4 are connected via a sealing insert 9. The diameter of the sealing insert 9 matches the inner diameter of the main loading arm 1, forming an inner seal. Secondly, the connecting flange 6 is connected to the sealing connection seat 3 via an annular sealing gasket 10. The inner diameter of the annular sealing gasket 10 matches the outer diameter of the main loading arm 1, forming a double outer seal. Finally, the connecting lug 22 of the upper fixed flange structure 2 is connected to the connecting flange 6 via an insertion groove 23. The hole 7 fits, and is then fixed to the locking bolt 8 through the locking screw hole 24. The misalignment of the docking can be finely adjusted. In the tank truck adaptive interface assembly 5, the interface flange ring block 51 is fixed to the docking pipe 4. The arc-shaped claw 53 connected by the spring 52 is semi-arc and expands and contracts with the specifications of the tank truck interface, fitting the inner wall. Pressing the handle block 54 facilitates operation, so that the two arc-shaped claws 53 and the lower part of the docking pipe 4 are located inside the tank truck oil pipe. Thus, this structure improves the sealing reliability through double sealing and adaptive adjustment, adapts to various tank truck interfaces, and reduces leakage and cost.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A leakage-proof structure for the front end of an loading arm, comprising a main loading arm (1), characterized in that: The lower part of the outer surface of the main loading arm (1) is sequentially and fixedly connected to an upper fixed flange structure (2) and a sealing connection seat (3) from top to bottom. A connecting pipe (4) is provided below the main loading arm (1). A tank car adaptive interface component (5) is inserted and fixedly connected to the lower part of the outer surface of the connecting pipe (4). A docking flange (6) is inserted and fixedly connected to the upper part of the outer surface of the connecting pipe (4). Three through-holes (7) are opened at the upper end of the docking flange (6). Three locking bolts (8) are movably connected to the annular array of threads on the outer surface of the docking flange (6). An annular sealing gasket (10) is fixedly connected to the upper end of the docking flange (6). A sealing insert (9) is fixedly connected to the middle of the upper end of the docking flange (6). The sealing insert (9) communicates with the interior of the connecting pipe (4).

2. The anti-leakage structure at the front end of the loading arm according to claim 1, characterized in that: The diameter area of ​​the sealing tube (9) is equal to the inner diameter area of ​​the main loading arm (1). The sealing tube (9) is inserted into the lower part of the main loading arm (1). The mating flange (6) is inserted into the lower end of the sealing connection seat (3) through the annular sealing gasket (10). The inner diameter area of ​​the annular sealing gasket (10) is equal to the outer diameter area of ​​the main loading arm (1).

3. The anti-leakage structure at the front end of the loading arm according to claim 1, characterized in that: The upper fixed flange structure (2) includes an annular seat (21). The lower end of the annular seat (21) is fixedly connected with three connecting lugs (22) in an annular array. The lower ends of the three connecting lugs (22) are provided with insertion slots (23). The three connecting lugs (22) are provided with through locking screw holes (24) on the side away from each other.

4. The anti-leakage structure at the front end of the loading arm according to claim 3, characterized in that: The annular seat (21) is fixedly connected to the lower part of the outer surface of the loading arm main pipe (1). The three connecting lugs (22) are respectively connected to the docking flange (6) through three insertion slots (23) and three insertion holes (7). The three connecting lugs (22) are respectively detachably connected to the docking flange (6) through three locking screw holes (24) and three locking bolts (8).

5. The anti-leakage structure at the front end of the loading arm according to claim 1, characterized in that: The tank truck adaptive interface assembly (5) includes an interface flange ring block (51), which is fixedly connected to the lower part of the outer surface of the connecting pipe (4). Springs (52) are fixedly connected to the left and right sides of the outer surface of the interface flange ring block (51). Arc-shaped claws (53) are fixedly connected to the ends of the two springs (52) away from the interface flange ring block (51). Press handles (54) are fixedly connected to the middle of the upper ends of the two arc-shaped claws (53).

6. The anti-leakage structure at the front end of the loading arm according to claim 5, characterized in that: The two arc-shaped claws (53) are distributed in a mirror image from left to right, and the arc-shaped claws (53) are semi-arc structures.

7. The anti-leakage structure at the front end of the loading arm according to claim 5, characterized in that: The lower parts of the two arc-shaped claws (53) and the connecting pipe (4) are located together inside the tank truck oil pipe.

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