An emergency disconnect valve for loading arms

Abstract

This utility model relates to the technical field of safety accessories for loading arms, and discloses an emergency disconnect valve for loading arms, comprising: an upper valve body and a lower valve body, the upper valve body and the lower valve body being connected by a disconnect bolt; a valve plate is disposed within the upper valve body, the valve plate being connected to the upper valve body via a valve plate shaft, and a torsion spring being disposed at the end of the valve plate shaft; a torsion spring cover is fixed to the torsion spring by cover bolts, ensuring that the valve plate on the valve plate shaft is perpendicular to the cross-section of the pipe inside the valve body, and the flow channel inside the upper valve body is open; the upper valve body and the lower valve body have symmetrical and identical structures; the valve plate inside the upper valve body and the valve plate inside the lower valve body are mutually engaged on the centerline of the valve plate shaft of the other. This utility model solves the problems of complex structure, small effective flow channel area, large pressure drop, and easy failure of springs or torsion springs due to media erosion in similar products.

Description

Technical Field

[0001] This utility model relates to the technical field of safety accessories for loading arms, and in particular to an emergency disconnect valve for loading arms. Background Technology

[0002] A disconnect valve (emergency disconnect device) prevents leaks caused by accidental pipeline rupture. It is applicable in areas such as ship-to-shore unloading, tank loading and unloading on highways and railways, and other fixed and mobile fluid storage devices, such as loading arms, fluid transfer arms, and connections between them and transport vehicles. This device acts as a weak connection point in the entire transmission process; it disconnects the pipeline connection upon reaching a set condition, ensuring that both ends of the pipeline are independently sealed after disconnection to prevent media leakage.

[0003] In the prior art, the spring support is generally located in the middle of the flow channel of the breakaway valve, resulting in a very small effective flow channel area. At the same time, components such as torsion springs or springs are located in the flow channel and are prone to failure due to long-term scouring by the medium. In addition, the medium flow path is affected by the torsion spring support, resulting in a complex medium flow path and more turbulent fluid morphology, leading to a large pressure drop. Utility Model Content

[0004] Purpose of the utility model: In view of the problems existing in the prior art, this utility model provides an emergency disconnect valve for loading arms, which solves the problems of complex structure, small effective flow area, large pressure drop, and easy failure of springs or torsion springs due to media erosion in similar products.

[0005] Technical Solution: This utility model provides an emergency disconnect valve for loading arms, comprising: an upper valve body and a lower valve body, the upper valve body and the lower valve body being connected by a disconnect bolt; a valve plate is disposed within the upper valve body, the valve plate being connected to the upper valve body via a valve plate shaft; a torsion spring is disposed at the end of the valve plate shaft; a torsion spring cover is fixed to the torsion spring by cover bolts, ensuring that the valve plate on the valve plate shaft is perpendicular to the cross-section of the pipe inside the valve body, and the flow channel inside the upper valve body is open; the upper valve body and the lower valve body have symmetrical and identical structures; the valve plate inside the upper valve body and the valve plate inside the lower valve body are mutually engaged on the centerline of the valve plate shaft of the other.

[0006] Furthermore, a bushing is provided between the upper valve body and the valve plate shaft, the shoulders at both ends of the valve plate shaft are clearance-fitted with the bushing, and the bushing is interference-fitted with the upper valve body.

[0007] Furthermore, both ends of the valve plate shaft are provided with torsion springs, and the torsional directions of the torsion springs at both ends of the valve plate shaft are consistent.

[0008] Furthermore, viewed from the axial direction of the valve plate shaft, the torsion direction of the torsion springs inside the upper and lower valve bodies is clockwise.

[0009] Furthermore, the dimensions of the valve plate are matched with the inner diameter of the upper valve body.

[0010] Furthermore, a valve plate sealing ring and a sealing ring pressure plate are provided on the valve plate, and the valve plate, valve plate sealing ring and sealing ring pressure plate are sequentially fastened to form a valve plate assembly.

[0011] Furthermore, a sealing gasket is provided between the upper valve body and the lower valve body.

[0012] Beneficial effects: This utility model has a simple structure, is easy to manufacture, and is lighter in weight than others of the same specifications, making it easier to operate. Compared with the prior art, the specific beneficial effects are as follows:

[0013] 1. In this utility model, during normal liquid transportation, the valve plate assembly is set perpendicular to the cross-section of the pipe inside the valve body, resulting in a large effective flow area and a straight flow channel. The fluid is mostly laminar and the pressure drop is small.

[0014] 2. In this utility model, the valve plate assembly rotates through the valve plate shaft, and the torsion spring is located outside the flow channel, which reduces the problem of the spring or torsion spring easily failing due to the scouring of the medium.

[0015] 3. In this utility model, each valve plate assembly is equipped with two torsion springs, which reduces the probability of torsion spring failure and improves the reliability and service life of the breakaway valve. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the emergency disconnect valve for the loading arm of this utility model;

[0017] Figure 2 This is a cross-sectional view of the emergency disconnect valve for the loading arm of this utility model from one angle;

[0018] Figure 3 This is another cross-sectional view of the emergency disconnect valve for the loading arm of this utility model;

[0019] Figure 4 This is a top view of the emergency disconnect valve for the loading arm of this utility model;

[0020] Illustration: 1. Upper valve body; 2. Lower valve body; 3. Torsion spring cover; 4. Valve plate shaft; 5. Cover bolt; 6. Torsion spring; 7. Pull-out bolt; 8. Bushing; 91. Valve plate; 92. Valve plate sealing ring; 93. Sealing ring pressure plate; 94. Pressure plate bolt; 95. Valve plate bolt; 10. Sealing gasket. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the embodiments.

[0022] Implementation method 1:

[0023] This embodiment provides an emergency disconnect valve for loading arms, such as... Figure 1-4 As shown:

[0024] Includes: an upper valve body 1 and a lower valve body 2, which are connected by a pull-out bolt 7. A sealing gasket 10 is also provided between the upper valve body 1 and the lower valve body 2. The upper valve body 1 and the lower valve body 2 have symmetrical and identical structures.

[0025] A break-off mechanism is provided on the side of the upper valve body 1 that is close to the lower valve body 2. The break-off mechanism includes a valve plate assembly, a valve plate shaft 4, and a torsion spring assembly. The valve plate assembly includes a valve plate 91, a valve plate sealing ring 92, a sealing ring pressure plate 93, and a pressure plate bolt 94. The valve plate 91, the valve plate sealing ring 92, and the sealing ring pressure plate 93 are sequentially fastened by the pressure plate bolt 94. The valve plate assembly is located inside the upper valve body 1 and is connected to the upper valve body 1 through the valve plate shaft 4. The torsion spring assembly includes a torsion spring cover 3, cover bolts 5, and a torsion spring 6. The torsion spring cover 3 is located outside the upper valve body 1, near the connection point with the lower valve body 2. Both ends of the valve plate shaft 4 are located inside the torsion spring cover 3, and both ends of the valve plate shaft 4 are equipped with torsion springs 6. The torsion directions of the torsion springs 6 at both ends of the valve plate shaft 4 are consistent. From the axial direction of the valve plate shaft 4, the torsion directions of the torsion springs 6 in the upper valve body 1 and the lower valve body 2 are clockwise. The torsion spring cover 3 fixes the torsion springs 6 through the cover bolts 5, thereby limiting the valve plate assembly on the valve plate shaft 4, ensuring that the valve plate assembly on the valve plate shaft 4 is perpendicular to the cross-section of the pipe inside the upper valve body 1, and the flow channel inside the upper valve body 1 is open. A bushing 8 is provided between the upper valve body 1 and the valve plate shaft 4. The shoulders at both ends of the valve plate shaft 4 are clearance-fitted with the bushing 8, and the bushing 8 is interference-fitted with the upper valve body 1.

[0026] A break-off mechanism is provided on the side of the lower valve body 2 that is close to the upper valve body 1. The break-off mechanism includes a valve plate assembly, a valve plate shaft 4, and a torsion spring assembly. The valve plate assembly includes a valve plate 91, a valve plate sealing ring 92, a sealing ring pressure plate 93, and a pressure plate bolt 94. The valve plate 91, the valve plate sealing ring 92, and the sealing ring pressure plate 93 are sequentially fastened by the pressure plate bolt 94. The valve plate assembly is located inside the lower valve body 2 and is connected to the lower valve body 2 via the valve plate shaft 4. The torsion spring assembly includes a torsion spring cover 3, cover bolts 5, and a torsion spring 6. The torsion spring cover 3 is located outside the lower valve body 2, near the connection point with the upper valve body 1. Both ends of the valve plate shaft 4 are located inside the torsion spring cover 3, and both ends of the valve plate shaft 4 are equipped with torsion springs 6. The torsional direction of the torsion springs 6 at both ends of the valve plate shaft 4 is consistent. From the axial direction of the valve plate shaft 4, the torsional direction of the torsion springs 6 in the upper valve body 1 and the lower valve body 2 is clockwise. The torsion spring cover 3 fixes the torsion springs 6 through the cover bolts 5, thereby limiting the valve plate assembly on the valve plate shaft 4, ensuring that the valve plate assembly on the valve plate shaft 4 is perpendicular to the cross-section of the pipe inside the lower valve body 2, and the flow channel inside the lower valve body 2 is open. A bushing 8 is provided between the lower valve body 2 and the valve plate shaft 4. The shoulders at both ends of the valve plate shaft 4 are clearance-fitted with the bushing 8, and the bushing 8 is interference-fitted with the lower valve body 2.

[0027] The valve plate assembly in the upper valve body 1 and the valve plate assembly in the lower valve body 2 are locked together on the center line of the valve plate shaft 4 of each other.

[0028] The working principle of this utility model is as follows: During normal use of this utility model for transporting liquids, the emergency break-off valve of this utility model is installed on the loading arm via flanges at both ends. With the loading arm still in place, the torsion spring assembly limits the valve plate assembly on the valve plate shaft. Simultaneously, the valve plate assemblies in the upper and lower valve bodies are mutually engaged along the centerline of each other's valve plate shafts, opening the flow channels within the upper and lower valve bodies and allowing unobstructed flow of the liquid medium. When the vehicle moves, and the tension on the loading arm reaches the preset stress value of the break-off bolt, the break-off bolt breaks, separating the upper and lower valve bodies. This causes the valve plate assemblies on the upper and lower valve bodies to disengage. Due to the torsion of the torsion spring, the valve plate assembly rotates clockwise, and after rotating 90 degrees, the valve plate sealing ring seals with the upper and lower valve bodies, forming a completely closed state. This creates two independent sealed spaces with the loading arm system, achieving the purpose of preventing leakage of the filling medium.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An emergency disconnect valve for loading arms, characterized in that, include: The upper valve body and the lower valve body are connected by pull bolts. A valve plate is installed inside the upper valve body. The valve plate is connected to the upper valve body by a valve plate shaft. A torsion spring is installed at the end of the valve plate shaft. The torsion spring is fixed by a cover bolt to ensure that the valve plate on the valve plate shaft is perpendicular to the cross-section of the pipe inside the valve body, and the flow channel inside the upper valve body is open. The upper valve body and the lower valve body have symmetrical and identical structures. The valve plate inside the upper valve body and the valve plate inside the lower valve body are locked together on the center line of the valve plate shaft of each other.

2. The emergency disconnect valve for loading arms according to claim 1, characterized in that: A bushing is provided between the upper valve body and the valve plate shaft. The shoulders at both ends of the valve plate shaft are clearance-fitted with the bushing, and the bushing is interference-fitted with the upper valve body.

3. The emergency disconnect valve for loading arms according to claim 1, characterized in that: Both ends of the valve plate shaft are provided with torsion springs, and the torsional direction of the torsion springs at both ends of the valve plate shaft is the same.

4. The emergency disconnect valve for loading arms according to claim 1, characterized in that: Viewed from the axial direction of the valve plate shaft, the torsion force of the torsion springs in the upper and lower valve bodies is clockwise.

5. The emergency disconnect valve for loading arms according to claim 1, characterized in that: The dimensions of the valve plate are matched with the inner diameter of the upper valve body.

6. The emergency disconnect valve for loading arms according to claim 1, characterized in that: The valve plate is equipped with a valve plate sealing ring and a sealing ring pressure plate, and the valve plate, valve plate sealing ring and sealing ring pressure plate are sequentially fastened to form a valve plate assembly.

7. The emergency disconnect valve for loading arms according to claim 1, characterized in that: A sealing gasket is also provided between the upper valve body and the lower valve body.

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