Emergency release device for a swivel

Abstract

The utility model discloses an emergency disengaging device for a lance, relates to the technical field of the matching equipment of the lance, including upper valve body, connecting flange, pull -off bolt, lower valve body, annular fixed plate, the bottom of upper valve body is provided with lower valve body, one side of upper valve body and lower valve body all is welded with connecting flange, one side of upper valve body and lower valve body all is fixed with annular fixed plate. The utility model discloses through the pressure that bears exceeds the set pull -off force after, pull -off bolt breaks, thereby make upper valve body and lower valve body disengage, in turn make two push rods separate, and then make the force that two groups of return springs are extruded disappear, thereby promotes two telescopic link to make lifting movement respectively, to make synchronous movement of two sealing valve spools, until one side of sealing valve spool and one side of baffle mutually adhere, through above -mentioned operation is convenient for the sealing of upper valve body and lower valve body synchronous, thereby avoid the phenomenon of medium leakage to occur.

Description

Technical Field

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

[0002] An loading arm is a type of extendable pipe that is widely used for loading and unloading liquids at oil and chemical terminals. The medium inside the pipe can be oil, water, etc. It is a special equipment for the fluid loading and unloading process in the petrochemical industry. When using a loading arm, an emergency release device is required to ensure that it can be released in an emergency when it is subjected to force, thereby preventing the medium from leaking out and avoiding accidents caused by the leakage of chemicals from the open section. In an emergency disconnection device for a top loading arm (CN222861148U), the device includes an upper valve body and a lower valve body. The upper valve body is mounted on the outer arm, and the lower valve body is mounted on the vertical pipe. The upper valve body has an oil flow channel I, and a one-way sealing valve core is provided in the oil flow channel I. A sealing step is provided on the inner wall of the upper valve body, and a sealing part that cooperates with the sealing step is provided on the one-way sealing valve core. A compression elastic mechanism is provided on the upper valve seat. The lower valve body has an oil flow channel II, and a guide valve core is provided in the oil flow channel II. A guide column that cooperates with the one-way sealing valve core is provided at the top center of the guide valve core. This utility model achieves the sealing and opening of the upper valve body by setting a one-way sealing valve core and a guide valve core. The one-way sealing valve core is provided with an impact surface and a sealing platform. The principle is simple, reliable, easy to manufacture, reusable, economical, and highly reliable. However, the existing emergency disconnection device for top loading arms has the following defects in use: When the existing technology is subjected to external force, the break bolt breaks, the upper valve body and the lower valve body separate, the guide column no longer acts on the valve core, and the one-way sealing valve core is subjected to the action of the compression spring to instantly seal the upper valve body, forming a one-way check valve. The lower valve body is taken away from the site by the tank truck along with the vertical pipe. However, in actual use, the above operation can only seal the upper valve body and it is inconvenient to seal the lower valve body, which makes the lower valve body prone to medium leakage, thereby reducing its safety performance.

[0003] Therefore, we proposed an emergency detachment device for the loading arm to solve the problems mentioned above. Utility Model Content

[0004] The purpose of this invention is to provide an emergency disconnection device for loading arms, in order to solve the problem mentioned in the background art that the existing emergency disconnection devices for loading arms are inconvenient to seal the two valve bodies during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an emergency disconnection device for loading arms, comprising an upper valve body, a connecting flange, a pull-out bolt, a lower valve body, and an annular fixing plate. The lower valve body is provided at the bottom end of the upper valve body. A connecting flange is welded to one side of both the upper and lower valve bodies. An annular fixing plate is fixed to the other side of both the upper and lower valve bodies, and a pull-out bolt passes through the interior of the annular fixing plate. The upper and lower valve bodies are fixedly connected by the pull-out bolt. Both the upper and lower valve bodies are equipped with sealing mechanisms. A valve seat is fixed inside the upper and lower valve bodies on one side of the sealing mechanism. A flow port is opened inside the valve seat. A baffle is welded to one side of the upper and lower valve bodies. A sealing groove is opened on one side of the baffle.

[0006] Furthermore, the sealing mechanism includes a fixed rod, which is disposed at the bottom end of the valve seat. A return spring is fixed inside the fixed rod, and a telescopic rod is fixed at the bottom end of the return spring. A sealing valve core is fixed at the bottom end of the telescopic rod, and a sealing gasket is adhered to the bottom end of the sealing valve core. A sealing ring is adhered to the bottom end of the sealing valve core on one side of the sealing gasket. A push rod is welded to the bottom end of the sealing valve core, and a pull rod is welded to the top end of the sealing valve core. A sealing plate is fixed to the bottom end of the pull rod. Sealing blocks are evenly distributed at the bottom end of the sealing plate, and the positions of the sealing blocks correspond one-to-one with the positions of the flow ports.

[0007] Furthermore, two sealing plates are provided, and the outer edges of the two sealing plates are slidably fitted against the inner walls of the upper valve body and the lower valve body. The interior of the two sealing plates is provided with through grooves, and the through grooves and flow ports are arranged alternately.

[0008] Furthermore, the reset spring is provided in two sets, each set of the reset spring is in a compressed state inside the fixed rod, and each set of the reset spring is made of stainless steel, with a corrosion-resistant coating evenly applied to the outer surface of each set of the reset spring.

[0009] Furthermore, two sealing gaskets are provided, both of which have annular cross-sections and are made of rubber.

[0010] Furthermore, the flow ports are provided in two groups, with four flow ports in each group, and the flow ports in each group are arranged in a cross shape.

[0011] Furthermore, there are two sealing grooves, both of which have annular cross-sections and are symmetrically distributed.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the emergency disconnect device for the loading arm can not only seal the two valve bodies, but also improve the sealing effect; When the pressure exceeds the set breaking force, the break bolt breaks, causing the upper and lower valve bodies to separate. This causes the two push rods to separate, and the force compressing the two sets of return springs disappears, thus pushing the two telescopic rods to move up and down. This allows the two sealing valve cores to move synchronously until one side of the sealing valve core and one side of the baffle are in contact with each other. This operation facilitates the synchronous sealing of the upper and lower valve bodies, thereby preventing media leakage. While the two sealing valve cores move up and down, the two connecting rods cause the two sealing plates to move synchronously until the sealing plates and valve seats are in contact with each other, so that the sealing block is inserted into the flow port. The above operation facilitates further sealing of the upper and lower valve bodies, thereby reducing the risk of media leakage. The sealing gasket is compressed by the mutual contact of the sealing valve core and the baffle, thus achieving an initial seal. The sealing ring and sealing groove further seal the gasket, thereby improving the sealing effect and enhancing its safety performance during use. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model; Figure 2 This is a three-dimensional structural schematic diagram of the upper valve body of this utility model, showing a front cross-sectional view. Figure 3 This is a side view of the three-dimensional structure of the present invention; Figure 4 This is a three-dimensional structural diagram of the sealing mechanism of this utility model; Figure 5 This is a three-dimensional structural diagram of the sealing valve core of this utility model.

[0015] The reference numerals in the figure are as follows: 1. Upper valve body; 2. Connecting flange; 3. Sealing mechanism; 301. Sealing plate; 302. Sealing valve core; 303. Sealing block; 304. Pull rod; 305. Push rod; 306. Telescopic rod; 307. Fixed rod; 308. Sealing ring; 309. Return spring; 310. Sealing gasket; 4. Valve seat; 5. Pull-out bolt; 6. Lower valve body; 7. Flow port; 8. Sealing groove; 9. Annular fixed plate; 10. Baffle. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] Please see Figures 1-5 The present invention provides the following technical solution: Example 1: To address the problem of inconvenience in sealing the two valve bodies during use in the prior art, the following technical solution is disclosed. Please refer to the following for details. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the emergency disconnect device for the loading arm includes an upper valve body 1, a connecting flange 2, a pull-out bolt 5, a lower valve body 6, and an annular fixing plate 9. The lower valve body 6 is located at the bottom of the upper valve body 1. A connecting flange 2 is welded to one side of both the upper valve body 1 and the lower valve body 6. An annular fixing plate 9 is fixed to the other side of both the upper valve body 1 and the lower valve body 6, and a pull-out bolt 5 passes through the interior of the annular fixing plate 9. The upper valve body 1 and the lower valve body 6 are fixedly connected by the pull-out bolt 5. Each valve seat 4 is internally equipped with a sealing mechanism 3. The sealing mechanism 3 includes a fixing rod 307, which is located at the bottom end of the valve seat 4. A return spring 309 is fixed inside the fixing rod 307, and a telescopic rod 306 is fixed to the bottom end of the return spring 309. A sealing valve core 302 is fixed to the bottom end of the telescopic rod 306, and a sealing gasket 310 is adhered to the bottom end of the sealing valve core 302. A sealing ring 30 is adhered to the bottom end of the sealing valve core 302 on one side of the sealing gasket 310. 8. A push rod 305 is welded to the bottom end of the sealing valve core 302, and a pull rod 304 is welded to the top end of the sealing valve core 302. A sealing plate 301 is fixed to the bottom end of the pull rod 304. Sealing blocks 303 are evenly arranged at the bottom end of the sealing plate 301, and the positions of the sealing blocks 303 correspond one-to-one with the positions of the flow ports 7. There are two sealing plates 301. The outer edges of the two sealing plates 301 slide against the inner walls of the upper valve body 1 and the lower valve body 6. The interior of the two sealing plates 301 is provided with through grooves. The through grooves and the flow ports 7 are arranged alternately. There are two sets of return springs 309. Each set of return springs 309 is in a compressed state inside the fixed rod 307. The material of each set of return springs 309 is stainless steel. The outer surface of each set of return springs 309 is evenly coated with corrosion-resistant paint. There are two sealing gaskets 310. The cross-section of the two sealing gaskets 310 is annular, and the material of the two sealing gaskets 310 is rubber.

[0018] In this embodiment, the upper valve body 1 and the lower valve body 6 are connected by the pull-out bolt 5 and the annular fixing plate 9. During connection, the two push rods 305 press against each other, thereby pushing the two sealing valve cores 302 upwards. This causes the telescopic rod 306 to slide inside the fixing rod 307, compressing the return spring 309. When the sealing valve core 302 moves away from the baffle 10, the medium is easily transported under the action of the upper valve body 1 and the lower valve body 6. When the loading arm is subjected to force, the pull-out bolt 5 can break, allowing for emergency disengagement and preventing damage. After the pull-out bolt 5 breaks, the upper valve body 1 and the lower valve body 6 separate, causing the push rod 305 to detach. This causes the force on the return spring 309 to disappear, thereby pushing the telescopic rod 306 to return to its original position. This, in turn, causes the sealing valve core 302 to move until one side of the sealing valve core 302 is in contact with one side of the baffle 10, thus sealing the disengaged upper valve body 1 and lower valve body 6. Simultaneously, the movement of the sealing valve core 302 causes the pull rod 304 to move synchronously, thereby causing the sealing plate 301 to move until one side of the sealing plate 301 is in contact with one side of the valve seat 4. This allows the sealing block 303 to be inserted into the flow port 7, further sealing the upper valve body 1 and lower valve body 6, thereby reducing the risk of media leakage and improving its safety during use.

[0019] Example 2 differs from Example 1 in that it further improves the sealing effect during use. Therefore, the following technical solution is disclosed. Please refer to the details. Figure 1 , Figure 4 , Figure 5 As shown, valve seats 4 are fixed inside the upper valve body 1 and lower valve body 6 on one side of the sealing mechanism 3, and flow ports 7 are opened inside the valve seats 4. There are two sets of flow ports 7, and each set of flow ports 7 has four flow ports 7, and each set of flow ports 7 is arranged in a cross shape. A baffle 10 is welded to one side inside the upper valve body 1 and lower valve body 6, and a sealing groove 8 is opened on one side of the baffle 10. There are two sealing grooves 8, and the cross section of the two sealing grooves 8 is annular, and the two sealing grooves 8 are symmetrically distributed.

[0020] In this embodiment, when one side of the sealing valve core 302 and one side of the baffle 10 are in contact with each other, the sealing gasket 310 can be squeezed and pressed tightly against the flat surface of the baffle 10, forming the first main sealing barrier and blocking most of the leakage path of the medium. On the other hand, the sealing ring 308 is inserted into the interior of the sealing groove 8. This is an axial insertion seal or a labyrinth seal. Even if a very small amount of medium passes through the seal between the sealing gasket 310 and the baffle 10, it needs to bypass the tiny gap between the sealing ring 308 and the sealing groove 8, greatly increasing the flow resistance and thus achieving effective sealing. The sealing effect is improved through the above operations.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0022] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An emergency disconnection device for loading arms, comprising an upper valve body (1), a connecting flange (2), a pull-out bolt (5), a lower valve body (6), and an annular fixing plate (9). The lower valve body (6) is provided at the bottom end of the upper valve body (1). A connecting flange (2) is welded to one side of both the upper valve body (1) and the lower valve body (6). An annular fixing plate (9) is fixed to the other side of both the upper valve body (1) and the lower valve body (6). A pull-out bolt (5) passes through the interior of the annular fixing plate (9). The upper valve body (1) and the lower valve body (6) are fixedly connected by the pull-out bolt (5). Its features are: The upper valve body (1) and the lower valve body (6) are both equipped with sealing mechanisms (3), and valve seats (4) are fixed inside the upper valve body (1) and the lower valve body (6) on one side of the sealing mechanism (3). A flow port (7) is opened inside the valve seat (4). A baffle (10) is welded to one side of the upper valve body (1) and the lower valve body (6), and a sealing groove (8) is opened on one side of the baffle (10).

2. The emergency disengagement device for the loading arm according to claim 1, characterized in that: The sealing mechanism (3) includes a fixed rod (307), which is located at the bottom of the valve seat (4). A return spring (309) is fixed inside the fixed rod (307), and a telescopic rod (306) is fixed at the bottom of the return spring (309). A sealing valve core (302) is fixed at the bottom of the telescopic rod (306), and a sealing gasket (310) is attached to the bottom of the sealing valve core (302). A sealing ring (308) is attached to the bottom of the sealing valve core (302) on one side of the sealing gasket (310). A push rod (305) is welded to the bottom of the sealing valve core (302), and a pull rod (304) is welded to the top of the sealing valve core (302). A sealing plate (301) is fixed to the bottom of the pull rod (304). Sealing blocks (303) are evenly arranged at the bottom of the sealing plate (301), and the positions of the sealing blocks (303) and the flow port (7) correspond one-to-one.

3. The emergency disengagement device for the loading arm according to claim 2, characterized in that: There are two sealing plates (301). The outer edges of the two sealing plates (301) are slidably attached to the inner walls of the upper valve body (1) and the lower valve body (6). The interior of the two sealing plates (301) is provided with through grooves, and the through grooves and flow ports (7) are arranged in an alternating manner.

4. The emergency disengagement device for the loading arm according to claim 2, characterized in that: The reset spring (309) is provided in two sets. Each set of reset springs (309) is in a compressed state inside the fixed rod (307). The material of each set of reset springs (309) is stainless steel. The outer surface of each set of reset springs (309) is uniformly coated with corrosion-resistant paint.

5. The emergency disengagement device for the loading arm according to claim 2, characterized in that: Two sealing gaskets (310) are provided, both of which have annular cross-sections and are made of rubber.

6. The emergency disengagement device for the loading arm according to claim 1, characterized in that: The flow ports (7) are provided in two groups, each group of which has four flow ports (7), and each group of flow ports (7) is arranged in a cross shape.

7. The emergency disengagement device for the loading arm according to claim 1, characterized in that: There are two sealing grooves (8), both of which have annular cross sections and are symmetrically distributed.

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