An oil and gas recovery pull apart valve

Abstract

The utility model belongs to the technical field of pull -off valve, especially relate to an oil gas recovery pull -off valve, including oil inlet end valve body and oil outlet end valve body: the inner wall of oil inlet end valve body is equipped with annular clamping groove, and double C shaped retainer 41 subassembly is installed in annular clamping groove, and double C shaped retainer 41 subassembly includes two symmetrical distribution's C shaped retainer 41, and the outer wall of oil outlet end valve body is equipped with the annular recess that is adapted with double C shaped retainer 41 subassembly, and the detachable connection of oil inlet end valve body and oil outlet end valve body is realized through the clamping of double C shaped retainer 41 subassembly and annular recess.The utility model provides an oil gas recovery pull -off valve that utilizes two C shaped retainers and improves the contact area to the original 2 times along the circumferential symmetry distribution, improves the pull -off force stability of pull -off valve.

Description

Technical Field

[0001] This utility model belongs to the field of breakaway valve technology, and in particular relates to an oil and gas recovery breakaway valve. Background Technology

[0002] The vapor recovery disconnect valve is the core emergency disconnect device connecting the fuel dispenser and the fuel nozzle. Its core function is to automatically disconnect the hose when it is subjected to a preset tension, and to achieve bidirectional sealing of the oil and gas circuits. This prevents safety accidents caused by the fuel dispenser tipping over or fuel leakage, while also ensuring the accuracy of the gas-liquid ratio in the vapor recovery system.

[0003] In the prior art, Chinese utility model patent CN204099673U discloses an oil and gas recovery breakaway valve. This breakaway valve connects the inlet valve body and the outlet valve body through a C-shaped retaining ring. Internally, it incorporates a shock-absorbing ring, a damping ring, an oil circuit sealing valve core, an air circuit connecting shaft, and a sealing spring, thus solving to some extent the problems of "unstable breaking force, non-reusability, and lack of air circuit sealing" in traditional breakaway valves. However, this technology still has several shortcomings in long-term practical application, limiting its safety, reliability, and service life. Specific deficiencies are as follows: This breakaway valve relies on a single C-shaped retaining ring to connect the valve body and trigger the breakaway mechanism. The mating surface between the C-shaped retaining ring and the valve body groove is subject to long-term corrosion from oil, high-frequency vibration of the hose, and repeated disassembly and assembly, which can easily cause wear or deformation. This leads to a gradual decrease in the retaining ring's clamping force. In mild cases, this can result in "accidental breakage" in non-emergency scenarios (such as when a person accidentally trips the hose). In severe cases, such as when a vehicle is towing, the breakaway force increases and the valve cannot be disconnected in time, directly threatening the safety of the equipment and personnel. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing an oil and gas recovery break-off valve that utilizes two C-shaped retaining rings symmetrically distributed circumferentially to double the original contact area, thereby improving the break-off force stability of the break-off valve.

[0005] In view of this, the present invention provides an oil and gas recovery disconnect valve, comprising an inlet valve body and an outlet valve body: The inner wall of the oil inlet valve body is provided with an annular groove, and a double C-shaped retaining ring 41 assembly is installed in the annular groove. The double C-shaped retaining ring 41 assembly includes two symmetrically distributed C-shaped retaining rings 41. The outer wall of the oil outlet valve body is provided with an annular groove that is adapted to the double C-shaped retaining ring 41 assembly. The oil inlet valve body and the oil outlet valve body are detachably connected by the engagement of the double C-shaped retaining ring 41 assembly with the annular groove.

[0006] In the above technical solution, further, an oil passage sealing valve core is provided on the outside of the air passage connecting shaft, one end of the air passage connecting shaft is tightly fitted and fixed to the oil passage sealing valve core, and the other end extends into the inside of the oil outlet valve body; a sealing spring is provided between the support seat and the oil passage sealing valve core.

[0007] In any of the above technical solutions, an integrated shock-absorbing damping component is further provided between the oil inlet valve body and the oil outlet valve body, and the shock-absorbing damping component is tightly fitted with the end face of the valve body; and a sealing ring is provided between the shock-absorbing damping component and the oil inlet valve body and the oil outlet valve body respectively.

[0008] In any of the above technical solutions, a positioning pin is further fixed on the end face of the oil inlet valve body, and a positioning hole adapted to the positioning pin is opened on the end face of the oil outlet valve body, with the positioning pin and the positioning hole being coaxially arranged.

[0009] In any of the above technical solutions, the outer wall of the positioning pin is provided with a guide cone surface, and the entrance of the positioning hole is provided with a flared section, the taper of the guide cone surface being consistent with the taper of the flared section.

[0010] The beneficial effects of this utility model are: 1. The valve body is symmetrically clamped by the double C-shaped retaining ring assembly, which disperses the force and stabilizes the breaking force. This not only avoids accidental breakage in non-emergency scenarios, but also ensures timely disconnection in emergency situations such as vehicle towing, eliminating the risk of equipment damage and safety accidents.

[0011] 2. The threaded support seat fixes the sealing spring, which is tightly fitted with the air passage connecting shaft and the oil passage sealing valve core. When broken, the spring quickly pushes the valve core to block the oil passage. In addition, the double sealing rings on both sides of the integrated shock-absorbing damping component achieve double sealing of the oil passage and external connection, so that there is no oil / oil gas leakage.

[0012] 3. The integrated shock absorption and damping components work together to absorb external vibrations, suppress valve body sway, and reduce impact on internal parts; and avoid the wear of seals caused by displacement of traditional split shock absorption and damping components, significantly extending the overall service life of the breakaway valve.

[0013] 4. The coaxial locating pin and locating hole ensure the alignment of the valve body axis. The taper of the guide cone surface of the locating pin matches the taper of the flared section of the locating hole. During assembly, the deviation is automatically corrected, eliminating the need for repeated adjustments. This improves assembly efficiency, avoids hard contact wear of parts, and ensures the fitting accuracy of internal components. Attached Figure Description

[0014] Figure 1 This is a first three-dimensional structural schematic diagram of this utility model; Figure 2 This is a schematic diagram of the second three-dimensional structure of this utility model; Figure 3 This is a sectional view of the present invention; Figure 4 This is a partial three-dimensional structural schematic diagram of the present invention; The attached figures are labeled as follows: 1. Inlet valve body; 2. Outlet valve body; 3. Annular groove; 4. Double C-shaped retaining ring 41 assembly; 41. C-shaped retaining ring; 5. Annular groove; 6. Support seat; 7. Air passage connecting shaft; 8. Oil passage sealing valve core; 9. Sealing spring; 10. Shock-absorbing damping component; 11. Sealing ring; 12. Locating pin; 13. Locating hole; 14. Guide cone surface. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0016] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0017] Example 1: like Figures 1-4 As shown, this embodiment provides an oil and gas recovery disconnect valve, including an inlet valve body 1 and an outlet valve body 2. The inner wall of the oil inlet valve body 1 is provided with an annular groove 3, and a double-shaped retaining ring assembly 4 is installed in the annular groove 3. The double-shaped retaining ring assembly 4 includes two symmetrically distributed C-shaped retaining rings 41. The outer wall of the oil outlet valve body 2 is provided with an annular groove 5 that is adapted to the double-shaped retaining ring assembly 4. The oil inlet valve body 1 and the oil outlet valve body 2 are detachably connected by the engagement of the double-shaped retaining ring assembly 4 and the annular groove 5.

[0018] In this technical solution, two symmetrically distributed C-shaped retaining rings 41 (double retaining ring assembly 4) are installed in the annular groove 3 of the oil inlet valve body 1. The two C-shaped retaining rings 41 are engaged together in the annular groove 5 on the outer wall of the oil outlet valve body 2. Through the cooperation of the double retaining rings and the groove, a two-point symmetrical clamping structure is formed. Compared with the traditional single retaining ring, the contact area is larger and the stress distribution is more uniform. This can stably maintain the connection between the oil inlet valve body 1 and the oil outlet valve body 2, ensuring that oil and gas do not leak or accidentally separate during normal transportation.

[0019] When the hose is subjected to a tensile force exceeding a preset threshold, the force is transmitted to the double-ring assembly 4 through the valve body. The two symmetrical C-shaped rings are simultaneously stressed and disengage from the annular groove 5 of the outlet valve body 2, allowing the inlet valve body 1 and outlet valve body 2 to quickly separate, achieving an emergency disconnect function. Due to the symmetrical distribution of the double rings and balanced force distribution, "jamming" or "delayed disconnection" caused by excessive local stress in a single ring is avoided, ensuring the timeliness and reliability of the break-off action. This improves the stability of the clamping force of the valve body connection, preventing "accidental breakage" in non-emergency scenarios (such as accidental tripping of the hose); ensures reliable disconnection in emergency conditions (such as vehicle towing), preventing equipment damage or safety accidents caused by ring failure; and disperses stress through the double-ring structure, reducing wear and deformation during long-term use and extending the service life of the break-off valve.

[0020] like Figure 3 and Figure 4 As shown, in this embodiment, the optimized inlet valve body 1 is provided with a support seat 6 by a thread inside. The upper side of the inside of the support seat 6 is provided with a gas passage connecting shaft 7. The outer side of the gas passage connecting shaft 7 is provided with an oil passage sealing valve core 8. One end of the gas passage connecting shaft 7 is tightly fitted and fixed to the oil passage sealing valve core 8, and the other end extends into the inside of the outlet valve body 2. A sealing spring 9 is provided between the support seat 6 and the oil passage sealing valve core 8.

[0021] In this technical solution, the inlet valve body 1 is internally fixed with a threaded support 6 to ensure its stable position. One end of the air passage connecting shaft 7 is tightly fitted and fixed to the oil passage sealing valve core 8, and the other end extends into the interior of the outlet valve body 2, forming an isolation and communication channel for the oil and gas passages. At this time, the sealing spring 9 between the support 6 and the oil passage sealing valve core 8 is in a compressed state (stores elastic potential energy), the oil passage sealing valve core 8 does not block the oil passage, and oil and gas can be normally transported through the internal channel of the valve body.

[0022] When the double-ring retainer assembly 4 disengages from the annular groove 5 (valve body separation), the sealing spring 9 releases its compressive potential energy, generating a thrust that acts on the oil circuit sealing valve core 8. Since the air circuit connecting shaft 7 and the oil circuit sealing valve core 8 are tightly fitted and fixed, they move synchronously. Under the spring thrust, the oil circuit sealing valve core 8 quickly seals the oil passage of the oil inlet valve body 1, achieving immediate oil sealing. Simultaneously, the support seat 6, through threaded fixing, provides a stable force fulcrum for the sealing spring 9, ensuring uniform and continuous sealing pressure and preventing oil leakage due to poor sealing. This ensures rapid oil circuit sealing upon breakage, preventing oil leakage; provides stable sealing pressure through the sealing spring 9, guaranteeing the reliability of the oil circuit seal; and utilizes the threaded support seat 6 to achieve precise positioning and convenient installation of parts, improving assembly consistency.

[0023] like Figure 3 and Figure 4 As shown, in this embodiment, an integrated shock-absorbing damping component 10 is sandwiched between the oil inlet valve body 1 and the oil outlet valve body 2, and the shock-absorbing damping component 10 is tightly fitted to the end face of the valve body; and a sealing ring 11 is provided between the shock-absorbing damping component 10 and the oil inlet valve body 1 and the oil outlet valve body 2 respectively.

[0024] In this technical solution, the integrated shock-absorbing damping component 10 is sandwiched between the inlet valve body 1 and the outlet valve body 2, with its end face tightly fitted to the end faces of the two valve bodies, forming an integral buffer structure. When the breakaway valve is subjected to external vibration (such as vibration from the fuel dispenser or shaking from contact with the hose), the shock-absorbing damping component 10 can simultaneously perform shock absorption and damping functions, absorbing vibration energy through its own elasticity, while suppressing the relative swaying of the two valve bodies, avoiding buffer failure caused by component misalignment in traditional split structures. At the same time, the sealing rings 11 between the shock-absorbing damping component 10 and the inlet valve body 1 and the outlet valve body 2 are tightly fitted, forming a double quadruple sealing barrier to prevent internal oil or oil vapor from leaking from the connection gap between the two valve bodies. When the valve bodies separate, the integrated shock-absorbing damping component 10 is pulled apart along with the two valve bodies. Its elastic deformation can buffer the impact force at the moment of separation, reducing damage to the valve body end face and seals. Meanwhile, the sealing ring 11 remains sealed before separation, ensuring no oil or oil vapor leakage during the separation process. This improves the synergy between shock absorption and damping functions, reducing the impact of high-frequency vibrations (such as passing vehicles or hose swaying) on ​​the internal parts of the valve body; prevents relative displacement of the shock absorption / damping components due to vibration, and avoids premature wear of the seals; and enhances the sealing performance at the valve body joint through the double quadruple sealing ring 11, preventing oil or oil vapor leakage.

[0025] Example 2: This embodiment provides an oil and gas recovery breakaway valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0026] like Figure 3 and Figure 4As shown, in this embodiment, the end face of the oil inlet valve body 1 is fixed with a positioning pin 12, and the end face of the oil outlet valve body 2 is provided with a positioning hole 13 that is adapted to the positioning pin 12. The positioning pin 12 and the positioning hole 13 are coaxially arranged.

[0027] In this technical solution, when reassembling the inlet valve body 1 and outlet valve body 2 after breakage, the operator only needs to insert the positioning pin 12 on the end face of the inlet valve body 1 into the positioning hole 13 on the end face of the outlet valve body 2. Since the positioning pin 12 and the positioning hole 13 are coaxial, they can directly guide the two valve bodies to quickly align without repeatedly adjusting the valve body angle or position, quickly completing the initial positioning and providing a precise reference for the subsequent insertion of the double-ring retainer assembly 4 into the annular groove 5. After assembly, the positioning pin 12 remains embedded in the positioning hole 13. Because they are coaxial, the relative positions of the inlet valve body 1 and the outlet valve body 2 are forcibly constrained, ensuring that the central axes of the two valve bodies are always aligned. This avoids valve body displacement caused by slight shaking or vibration of the hose, thereby ensuring that internal components such as the air passage connecting shaft 7 and the oil passage sealing valve core 8 are always precisely matched. The double-ring retainer assembly 4 and the annular groove 5 are subjected to uniform force, preventing local jamming or excessive gaps, maintaining stable breaking force and oil and air passage sealing performance. It provides precise guidance for valve body assembly, simplifies the assembly process, and reduces the time spent on repeated adjustments; it ensures that the central axes of the inlet valve body 1 and the outlet valve body 2 are completely aligned, avoiding problems such as poor engagement between the double retaining ring assembly 4 and the annular groove 5 and misalignment of the air passage connecting shaft 7 due to axis misalignment; it ensures the fitting accuracy of internal seals (such as the oil passage sealing valve core 8 and the sealing ring 11), and maintains tensile strength stability and sealing reliability.

[0028] like Figure 3 and Figure 4 As shown, in this embodiment, the outer wall of the positioning pin 12 is provided with a guide cone surface 14, and the entrance of the positioning hole 13 is provided with a flared section. The taper of the guide cone surface 14 is consistent with the taper of the flared section.

[0029] In this technical solution, when assembling the inlet valve body 1 and the outlet valve body 2, if there is a slight misalignment between the two valve bodies (such as angular offset or axial misalignment), the guide cone surface 14 on the outer wall of the positioning pin 12 will first contact the flared section of the inlet of the positioning hole 13. Since the taper of the guide cone surface 14 and the flared section are consistent (e.g., both are 1:5-1:8), their inclined surfaces form a "wedge-shaped guide structure." When the guide cone surface 14 slides along the inner wall of the flared section, it generates a lateral correction force, automatically adjusting the relative position of the two valve bodies and gradually eliminating the deviation. Guided by the guide cone surface 14, the positioning pin 12 smoothly enters the straight section of the positioning hole 13, completing the coaxial positioning of the two valve bodies. Throughout the process, the conical surface mating avoids the jamming or collision that may occur with traditional "straight edge to straight edge" positioning. This protects the edges of the positioning pin 12 and positioning hole 13 (reducing wear by more than 90%) and makes the assembly operation smoother. Even non-professionals can quickly and accurately complete the docking, thereby reducing the alignment difficulty during valve body assembly. Even if there is a slight angular or positional deviation between the two valve bodies, it can be quickly corrected by the conical surface guide. It also avoids deformation or wear caused by hard contact (such as edge collision) between the positioning pin 12 and positioning hole 13 during assembly, protecting the integrity of the parts. Furthermore, it improves assembly efficiency, reduces the adjustment time for operators, and simplifies the operation process while ensuring positioning accuracy.

[0030] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An oil and gas recovery disconnect valve, comprising an inlet valve body (1) and an outlet valve body (2), characterized in that: The inner wall of the oil inlet valve body (1) is provided with an annular groove (3), and a double C-shaped retaining ring assembly (4) is installed in the annular groove (3). The double C-shaped retaining ring assembly (4) includes two symmetrically distributed C-shaped retaining rings (41). The outer wall of the oil outlet valve body (2) is provided with an annular groove (5) that is adapted to the double C-shaped retaining ring assembly (4). The oil inlet valve body (1) and the oil outlet valve body (2) are detachably connected by the snapping of the double C-shaped retaining ring assembly (4) and the annular groove (5).

2. The oil and gas recovery disconnect valve according to claim 1, characterized in that: The inlet valve body (1) is provided with a support seat (6) with internal threads. The upper side of the support seat (6) is provided with an air passage connecting shaft (7). The outer side of the air passage connecting shaft (7) is provided with an oil passage sealing valve core (8). One end of the air passage connecting shaft (7) is tightly fitted and fixed to the oil passage sealing valve core (8), and the other end extends into the inside of the outlet valve body (2). A sealing spring (9) is provided between the support seat (6) and the oil passage sealing valve core (8).

3. The oil and gas recovery disconnect valve according to claim 1, characterized in that: An integrated shock-absorbing damping component (10) is sandwiched between the oil inlet valve body (1) and the oil outlet valve body (2). The shock-absorbing damping component (10) is tightly fitted to the end face of the valve body. A sealing ring (11) is provided between the shock-absorbing damping component (10) and the oil inlet valve body (1) and the oil outlet valve body (2) respectively.

4. The oil and gas recovery disconnect valve according to claim 1, characterized in that: The end face of the oil inlet valve body (1) is fixed with a positioning pin (12), and the end face of the oil outlet valve body (2) is provided with a positioning hole (13) that is adapted to the positioning pin (12). The positioning pin (12) and the positioning hole (13) are coaxially arranged.

5. The oil and gas recovery disconnect valve according to claim 4, characterized in that: The outer wall of the positioning pin (12) is provided with a guide cone surface (14), and the entrance of the positioning hole (13) is provided with a flared section. The taper of the guide cone surface (14) is consistent with the taper of the flared section.

Images