Anti-shearing snap valve energy storage ring sealing structure

Abstract

The utility model relates to the technical field of breakaway valves, in particular to an anti-shearing breakaway valve energy storage ring sealing structure which comprises an upper valve body and a lower valve body, valve seats are fixedly arranged in the upper valve body and the lower valve body, valve rods penetrate through the valve seats in a sliding mode, valve clacks are fixedly connected to the outer walls of the valve rods, and an elastic block is fixedly connected between the two valve rods. The energy storage rings are arranged at the connecting positions of the upper valve body and the lower valve body, have certain shrinkage expansibility and can expand moderately under pressure to fill up tiny gaps, the sealing effect is kept, the risk of leakage from the connecting positions of the upper valve body and the lower valve body is reduced, the sealing effect is enhanced through the convex rings on the second energy storage rings, and the sealing effect is improved. The outer wall of the upper valve body and the outer wall of the lower valve body are provided with the sealing parts, the cavities are formed between the sealing parts and the valve bodies, when the valve bodies are broken and separated by external force, the volume of the cavities is increased, more leaked fluid can be contained, and the sealing performance of the valve bodies is improved.

Description

Technical Field

[0001] This utility model relates to the field of breakaway valve technology, and in particular to a shear-resistant breakaway valve energy storage ring sealing structure. Background Technology

[0002] A breakaway valve, also known as an emergency disconnect device, is a safety device used to prevent leakage accidents caused by accidental breakage. It is widely used in various fields such as tank loading and unloading on highways and railways, unloading from ships to shore, and other fixed and mobile fluid storage devices. The working principle of a breakaway valve is to reduce media leakage and stop media flow through an isolation device under specified conditions and within a specified pulling force range.

[0003] Chinese patent application CN104696564A discloses a cryogenic breakaway valve, including a valve body and a valve disc. The breakaway groove divides the valve body into a left valve body and a right valve body. The valve disc includes a left valve disc and a right valve disc. When the valve disc is stationary within the valve body, the inner ends of the left valve disc and the right valve disc abut against each other, and there are flow gaps between the left valve disc and the valve body, and between the right valve disc and the valve body. When the external force on the valve body reaches the designed value, the valve body is broken, and the valve disc quickly closes and seals under the action of spring force. However, under shear force or impact, the valve body experiences problems such as accumulator ring seal failure and the sealing components failing to effectively prevent leakage. In view of this, a shear-resistant breakaway valve accumulator ring sealing structure is provided. Utility Model Content

[0004] The main purpose of this utility model is to provide a shear breakage valve accumulator ring sealing structure to solve the problems mentioned in related technologies, such as accumulator ring seal failure and sealing components failing to effectively prevent leakage when the valve body is subjected to shear force or impact.

[0005] To achieve the above objectives, according to one aspect of the present invention, an anti-shear breakage valve energy storage ring sealing structure is provided, comprising an upper valve body and a lower valve body. A valve seat is fixedly disposed within both the upper and lower valve bodies, and a valve stem is slidably disposed through the valve seat. A valve disc is fixedly connected to the outer wall of each valve stem, and an elastic block is fixedly connected between the two valve stems. An energy storage ring for preliminary sealing is disposed at the connection between the upper and lower valve bodies, and a sealing component for further sealing is disposed on the outer wall of the upper and lower valve bodies.

[0006] Furthermore, the energy storage ring includes a first energy storage ring fixedly connected to the inner wall of the upper valve body, and a second energy storage ring fixedly connected to the inner wall of the lower valve body. The second energy storage ring is fixedly connected to a protruding ring with an inverted T-shaped cross-section, and the protruding ring is disposed inside the first energy storage ring.

[0007] Furthermore, the elastic block is located at the connection between the upper valve body and the lower valve body, and an annular groove is formed inside the elastic block. The length of the elastic block is greater than the height of the energy storage ring.

[0008] Furthermore, connecting blocks are symmetrically fixedly provided on the outer walls of both the upper and lower valve bodies, and screws are threaded through the connecting blocks. A protrusion is fixedly provided on the upper surface of the lower valve body, and the protrusion is inserted into the bottom of the upper valve body.

[0009] Furthermore, the sealing component includes a first fixing block fixedly installed on the outer wall of the upper valve body, the first fixing block having a groove, a spring being installed in the groove, and a bellows being installed on the outside of the spring.

[0010] Furthermore, the sealing component also includes a second fixing block fixedly installed on the outer wall of the lower valve body. A slider is fixedly connected to the upper end of the second fixing block. The slider is slidably installed in the slide groove, and one end of the spring is fixedly connected to the side wall of the slider.

[0011] Furthermore, limit rings are fixedly installed on the inner walls of both the upper and lower valve bodies. A slot is provided at the center of the limit ring, and an expansion block is fixedly connected to one side of the valve disc. The diameter of the slot is smaller than the diameter of the expansion block.

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

[0013] 1. In the energy storage ring sealing structure of the anti-shear breakage valve, an energy storage ring is provided, which has a certain degree of contraction and expansion. It can expand appropriately under pressure to fill the tiny gaps, maintain the sealing effect, and reduce the risk of leakage from the connection between the upper and lower valve bodies. In addition, the convex ring design on the second energy storage ring not only enhances the sealing effect, but also guides a small amount of leaked medium to flow along a longer path, further reducing the risk of leakage.

[0014] 2. In the accumulator sealing structure of this anti-shear breakage valve, a sealing component is provided. When the valve body is broken and separated by external force, the slider is restricted in its movement speed under the elastic force of the spring, which slows down the separation speed of the upper and lower valve bodies. As the separation distance increases, the cavity volume increases, which can accommodate more leaked fluid and prevent direct leakage. This not only improves the sealing performance of the valve body, but also provides time for emergency handling. Attached Figure Description

[0015] Figure 1 This is one of the schematic diagrams of the overall structure of the anti-shear breakage valve energy storage ring sealing structure in a preferred embodiment of this utility model;

[0016] Figure 2 This is a preferred embodiment of the present invention. Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0017] Figure 3 This is a preferred embodiment of the present invention. Figure 1 Enlarged schematic diagram of the structure at point B;

[0018] Figure 4 This is the second schematic diagram of the overall structure of the anti-shear breakage valve energy storage ring sealing structure in a preferred embodiment of this utility model;

[0019] Figure 5 This is the third schematic diagram of the overall structure of the anti-shear breakage valve energy storage ring sealing structure in the preferred embodiment of this utility model;

[0020] Figure 6 This is a preferred embodiment of the present invention. Figure 5 Enlarged schematic diagram of the structure at point C.

[0021] Illustration:

[0022] 1. Upper valve body; 11. Valve seat; 12. Valve stem; 13. First accumulator ring; 14. Connecting block; 15. Screw;

[0023] 2. Lower valve body; 21. Second energy storage ring; 22. Protrusion;

[0024] 3. Valve disc; 31. Expansion block; 4. Elastic block; 41. Annular groove;

[0025] 5. Sealing component; 51. First fixing block; 511. Slide groove; 512. Spring; 513. Bellows; 52. Second fixing block; 521. Slider; 53. Cavity;

[0026] 6. Limiting ring. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] Please see Figures 1-6 As shown, the purpose of this embodiment is to provide a shear breakage valve energy storage ring sealing structure, including an upper valve body 1 and a lower valve body 2. A valve seat 11 is fixedly installed inside the upper valve body 1 and the lower valve body 2. A valve stem 12 is slidably installed through the valve seat 11. A valve disc 3 is fixedly connected to the outer wall of the valve stem 12. An elastic block 4 is fixedly connected between the two valve stems 12. An energy storage ring for initial sealing is provided at the connection between the upper valve body 1 and the lower valve body 2. A sealing component 5 for further sealing is provided on the outer wall of the upper valve body 1 and the lower valve body 2.

[0029] The energy storage ring includes a first energy storage ring 13 fixedly connected to the inner wall of the upper valve body 1, and a second energy storage ring 21 fixedly connected to the inner wall of the lower valve body 2. The second energy storage ring 21 has a convex ring with an inverted T-shaped cross section fixedly connected to it. The convex ring is located inside the first energy storage ring 13. The energy storage ring has a certain degree of contraction and expansion. It can expand moderately to fill small gaps when subjected to pressure, and can return to its original shape when the pressure is released, thereby maintaining the sealing effect. Therefore, gas or liquid will not leak from the connection between the first energy storage ring 13 and the second energy storage ring 21. Even if there is a small amount of leakage, the outer wall of the convex ring can guide the leaking medium to flow along a longer path, which greatly reduces the risk of leakage from the connection between the upper valve body 1 and the lower valve body 2.

[0030] The elastic block 4 is located at the connection between the upper valve body 1 and the lower valve body 2, and is used to maintain the connection stability between the upper valve body 1 and the lower valve body 2. The elastic block 4 has an annular groove 41. The length of the elastic block 4 is greater than the height of the energy storage ring. A part of the energy storage ring is disposed through the annular groove 41. This not only increases the contact area between the energy storage ring and the elastic block 4, but also significantly improves the connection strength between them through physical interlocking. When the valve body is accidentally broken by impact, the elastic recovery ability of the elastic block 4 and the tight connection with the energy storage ring can significantly reduce the speed at which the first energy storage ring 13 and the second energy storage ring 21 separate due to external force. This helps to maintain the integrity of the valve body, reduce the risk of leakage, and provide a valuable time window for emergency repair and replacement.

[0031] Connecting blocks 14 are symmetrically fixed on the outer walls of the upper valve body 1 and the lower valve body 2, and screws 15 are threaded through the connecting blocks 14. The screws 15 are threaded onto the connecting blocks 14, which tightly fixes the upper valve body 1 and the lower valve body 2 together. A protrusion 22 is fixedly provided on the upper surface of the lower valve body 2. The protrusion 22 is inserted into the bottom of the upper valve body 1. A groove adapted to the protrusion 22 is opened at the bottom of the upper valve body 1. When a small amount of gas or liquid leaks, the setting of the protrusion 22 can effectively extend the leakage path, that is, the leaking medium needs to bypass the protrusion 22 to reach the external environment, thereby improving the anti-leakage performance of the valve body.

[0032] The sealing component 5 includes a first fixing block 51 fixedly installed on the outer wall of the upper valve body 1. A sliding groove 511 is provided in the first fixing block 51. A spring 512 is provided in the sliding groove 511, and a bellows 513 is provided on the outside of the spring 512. This effectively prevents the spring 512 from deforming due to vibration or pressure changes during long-term operation, thereby ensuring the long-term stability and reliability of the spring 512.

[0033] The sealing component 5 also includes a second fixing block 52 fixedly installed on the outer wall of the lower valve body 2. A slider 521 is fixedly connected to the upper end of the second fixing block 52. The slider 521 has an inverted L-shaped cross section. The slider 521 is slidably installed in the slide groove 511. One end of the spring 512 is fixedly connected to the side wall of the slider 521, and another end of the spring 512 is fixedly connected to the lower surface of the L-shaped short block of the slider 521. The other end of the spring 512 is fixedly connected to the bottom wall of the slide groove 511. The sealing component 5 and the outer wall of the valve body form a sealed cavity 53.

[0034] When the valve body is broken and separated by the outer wall, such as Figure 4 As shown, slider 521 slides within groove 511. However, under the elastic force of spring 512, the movement speed of slider 521 is limited to a certain extent, thereby slowing down the separation speed between the upper and lower valve bodies. As the separation distance between the upper valve body 1 and the lower valve body 2 increases, the first fixing block 51 and the second fixing block 52 gradually move away from each other, and the volume of cavity 53 gradually increases. Leaked gas or liquid enters cavity 53, preventing direct leakage.

[0035] Limiting rings 6 are fixedly installed on the inner walls of both the upper valve body 1 and the lower valve body 2. A groove is formed at the center of each limiting ring 6. The inner layer of the limiting ring 6 is made of elastic material and has a certain contractile force. An expansion block 31 is fixedly connected to one side of the valve disc 3. The diameter of the groove is smaller than the diameter of the expansion block 31. When the upper valve body 1 and the lower valve body 2 are completely separated, the energy storage ring separates, and the sealing component 5 breaks, leading to sealing failure. Figure 5 As shown, at this time, the elastic block 4 is pulled by the valve stems 12 on both sides, which will pull the valve stems 12 towards the connection point of the valve body. Due to the elastic setting of the inner layer of the limiting ring 6, the valve disc 3 can be squeezed through the slot and located on the other side of the limiting ring 6 under the action of force. At this time, the distance between the limiting ring 6 and the inner wall of the valve body opening is exactly equal to the thickness of the valve disc 3, so that the valve disc 3 can fit tightly against the valve body opening, forming an effective shielding seal. After the valve disc 3 moves into place, the expansion block 31 will come into close contact with the energy storage ring, forming a good seal, further enhancing the anti-leakage performance of the valve body.

[0036] In practical use, the upper valve body 1 and the lower valve body 2 are tightly fixed together by screws 15 threaded into the connecting block 14. When the valve body is subjected to an accidental impact that may cause it to break, the elastic recovery ability of the elastic block 4 helps to slow down the separation speed of the valve body. The energy storage ring expands moderately due to the external force, further filling the possible gap and reducing the risk of leakage. As the valve body gradually separates, the slider 521 slides in the groove 511, the first fixing block 51 and the second fixing block 52 gradually move away from each other, and as the separation distance increases, the volume of the cavity 53 increases to accommodate the leaked fluid. If the valve body is completely separated, the elastic block 4 is pulled by the valve stem 12, which pulls the valve stem 12 and valve disc 3 on both sides toward the valve body connection. Under the action of force, the valve disc 3 is squeezed through the groove of the limiting ring 6 and is located on the other side, closely fitting the valve body opening to form a shielding seal. The expansion block 31 is in close contact with the energy storage ring, further enhancing the sealing effect.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A shear cut pull valve energy storage ring sealing structure, comprising an upper valve body (1) and a lower valve body (2), a valve seat (11) is fixedly arranged in the upper valve body (1) and the lower valve body (2), a valve rod (12) is slidably arranged through the valve seat (11), characterized in that, The outer wall of the valve rod (12) is fixedly connected with a valve clack (3), and the elastic block (4) is fixedly connected between the two valve rods (12), the connecting part of the upper valve body (1) and the lower valve body (2) is provided with an energy storage ring for preliminary sealing, and the outer wall of the upper valve body (1) and the lower valve body (2) is provided with a sealing part (5) for further sealing.

2. The shear-hung valve accumulator ring seal structure of claim 1, wherein, The energy storage ring comprises a first energy storage ring (13) fixedly connected to the inner wall of the upper valve body (1), and a second energy storage ring (21) fixedly connected to the inner wall of the lower valve body (2), and a convex ring in inverted T-shaped section is fixedly connected to the second energy storage ring (21), and the convex ring is arranged in the first energy storage ring (13).

3. The shear-hung valve accumulator ring seal structure of claim 1, wherein, The elastic block (4) is located at the connecting part of the upper valve body (1) and the lower valve body (2), and the ring groove (41) is formed in the elastic block (4), and the length of the elastic block (4) is greater than the height of the energy storage ring.

4. The shear-hung valve accumulator ring seal structure of claim 1, wherein, The outer wall of the upper valve body (1) and the lower valve body (2) is fixedly provided with a connecting block (14) symmetrically, a screw (15) is screwed through the connecting block (14), the upper surface of the lower valve body (2) is fixedly provided with a convex block (22), and the convex block (22) is inserted into the bottom of the upper valve body (1).

5. The shear-hung valve accumulator ring seal structure of claim 1, wherein, The sealing part (5) comprises a first fixed block (51) fixedly installed on the outer wall of the upper valve body (1), a sliding groove (511) is formed in the first fixed block (51), a spring (512) is arranged in the sliding groove (511), and a bellows (513) is arranged outside the spring (512).

6. The shear-hung valve accumulator ring seal structure of claim 5, wherein, The sealing part (5) further comprises a second fixed block (52) fixedly installed on the outer wall of the lower valve body (2), a sliding block (521) is fixedly connected to the upper end of the second fixed block (52), the sliding block (521) is slidingly installed in the sliding groove (511), and one end of the spring (512) is fixedly connected with the side wall of the sliding block (521).

7. The shear-hung valve accumulator ring seal structure of claim 1, wherein, The inner wall of the upper valve body (1) and the lower valve body (2) is fixedly installed with a limiting ring (6), a slot is formed at the center of the limiting ring (6), one side of the valve clack (3) is fixedly connected with an expansion block (31), and the diameter of the slot is smaller than the diameter of the expansion block (31).

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