Ultrahigh-pressure emergency release valve

Abstract

The invention relates to the technical field of valves, and particularly discloses an ultrahigh-pressure emergency release valve which comprises a protection part and a valve body. A driving member; and a convex ring 1. According to the valve, when the valve body is closed, the inner taper sleeve moves towards the sealing ball, at the moment, the driving piece gradually gets close to the first convex ring, one movable rod can drive the movable ring to move towards the sealing ball, in this way, the rotating ring on the movable ring makes contact with the sealing ball at first, and the valve body can be in a closed state in advance; in this way, no fluid passes through before the inner taper sleeve makes contact with the sealing ball, impurity particles do not easily exist between the annular contact faces of the inner taper sleeve and the sealing ball, it is guaranteed that the inner taper sleeve and the sealing ball are in a completely closed state after making contact, fluid leakage is effectively avoided, and therefore the sealing performance of the release valve is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and particularly relates to an ultra-high pressure emergency relief valve. Background Art

[0002] In the petrochemical field, many production processes involve ultra-high pressure environments. For example, in the synthetic ammonia industry, the reaction pressure in the synthesis tower is usually as high as 15 - 30 MPa, and in some special organic synthesis reaction processes, the pressure can even exceed 100 MPa. In these high-pressure reaction systems, precise control of pressure and timely handling of abnormal pressure are crucial. Once the pressure gets out of control, it may cause violent decomposition of reactants, generating a large amount of heat and gas, which can lead to overpressure in the reaction vessel and even explosion, causing devastating damage to personnel safety and production facilities. In addition, during the long-term operation of high-pressure fluid transmission pipelines, due to local blockage of the pipeline, sudden change in fluid flow rate, etc., the pressure inside the pipe may rise sharply. If the pressure cannot be relieved in time, pipeline rupture and leakage accidents will be inevitable, which will not only cause material losses but also cause serious pollution to the surrounding environment. The ultra-high pressure fluid experimental field also has strict requirements for controlling ultra-high pressure environments. In the high-pressure performance test experiment of materials, to simulate the extreme pressure conditions in the deep earth, the experimental equipment needs to increase the pressure to above 100 MPa, and even reach 200 MPa. Under such high pressure, any minor sealing defect or pressure control failure in the experimental device may lead to the failure of the experiment. More seriously, it will pose a threat to the life safety of the experimental personnel. Moreover, these ultra-high pressure experimental equipment are often costly, and once damaged due to abnormal pressure, it will cause huge economic losses.

[0003] Looking at the existing relief valves on the market currently, such as Figure 1 the relief valve that uses a sealing ball and an inner conical sleeve to achieve switching has the following defects when facing ultra-high pressure working conditions up to 210 MPa: When the inner conical sleeve moves towards the sealing ball and the relief valve gradually closes, since there may be impurity particles in the fluid, when the inner conical sleeve is about to contact the sealing ball, impurity particles may get stuck between the annular contact surfaces of the inner conical sleeve and the sealing ball. In this way, the impurity particles will prevent the inner conical sleeve and the sealing ball from closing completely, resulting in possible leakage of the fluid, thus reducing the sealing performance of the relief valve. At the same time, the impurity particles stuck between the annular contact surfaces of the inner conical sleeve and the sealing ball may damage the annular contact surfaces, resulting in scratches or pits on the annular contact surfaces, which further reduces the sealing performance of the relief valve. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultra-high pressure emergency relief valve for the deficiencies of the existing technology, so as to solve the technical problem that the existing relief valve may have leakage during use.

[0005] The object of the present invention can be achieved by the following technical solutions:

[0006] A super high-pressure emergency relief valve, comprising a union tee, a union elbow, an upper end cover, an outer cylinder, a lower end cover, a sealing ball, an inner conical sleeve, a core shaft, a piston, a plug one, a plug two and a plug three. The relief valve further comprises:

[0007] A protective member, which includes a movable ring and a rotating ring. A limiting ring is arranged around the outer periphery of the inner conical sleeve. The movable ring is movably sleeved between the inner conical sleeve and the limiting ring. A rotating ring is rotatably installed at one end of the movable ring close to the sealing ball.

[0008] A driving member. A plurality of groups of driving members are installed between the movable ring and the inner conical sleeve. The driving member includes two movable rods and a tension spring. The two movable rods are hinged together. The movable ends of the two movable rods are respectively hinged to the end of the movable ring and the outer surface of the inner conical sleeve. A tension spring is installed between the two movable rods.

[0009] A first convex ring. An annular first convex ring is arranged inside the outer cylinder. When the tension spring is in a normal state, the diameter of the outermost sides of the two movable rods is greater than the inner diameter of the first convex ring.

[0010] As a preference of the above technical solution, turbine blades are arranged around the outer periphery of the rotating ring, and a plurality of groups of cleaning brushes are arranged inside the rotating ring.

[0011] As a preference of the above technical solution, a plurality of filtering holes are formed in the outer periphery of the rotating ring.

[0012] As a preference of the above technical solution, an annular second convex ring is further arranged inside the outer cylinder. The second convex ring is away from the sealing ball, and the first convex ring is located between the sealing ball and the second convex ring.

[0013] As a preference of the above technical solution, the cleaning brushes are elastically installed on the inner wall of the rotating ring, and the cleaning brushes always tend to incline away from the sealing ball.

[0014] As a preference of the above technical solution, a filtering member is installed inside the union elbow.

[0015] As a preference of the above technical solution, a plurality of groups of springs are installed inside the lower end cover. One end of each spring is provided with a steel ball, and a card slot is formed in the outer periphery of the core shaft. The steel ball is stuck in the card slot.

[0016] The beneficial effects of the present invention are:

[0017] 1. In the present invention, when the valve body is closed, the inner conical sleeve moves towards the sealing ball. At this time, the driving member gradually approaches the first convex ring, and one of the movable rods drives the movable ring to move towards the sealing ball. In this way, the rotating ring on the movable ring first contacts the sealing ball, so that the valve body can be brought into the closed state in advance. Before the inner conical sleeve is about to contact the sealing ball, there is no more fluid passing through. In this way, it is not easy for impurity particles to exist between the annular contact surfaces of the inner conical sleeve and the sealing ball, so as to ensure that the inner conical sleeve and the sealing ball are in a completely closed state after contact, effectively avoiding fluid leakage, and thus ensuring the sealing performance of the relief valve;

[0018] 2. In the present invention, when the movable ring drives the rotating ring to move towards the sealing ball, several groups of cleaning brushes are carried out by the rotating ring. The several groups of cleaning brushes are inclined towards the inner side of the inner conical sleeve and rotate. The rotation of the cleaning brushes can clean the inclined surface of the inner conical sleeve and the surface of the sealing ball, and can clean the attached impurity particles, effectively avoiding the existence of impurity particles between the inner conical sleeve and the annular contact surface of the sealing ball after the inner conical sleeve and the sealing ball contact, so as to ensure that the inner conical sleeve and the sealing ball are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve;

[0019] 3. In the present invention, when the inner conical sleeve moves towards the sealing ball, the cleaning brushes are inclined towards the inclined surface of the inner conical sleeve and are in a rotating state. In this way, several groups of cleaning brushes can protect the inclined surface of the inner conical sleeve, avoiding direct contact between impurity particles and the inclined surface of the inner conical sleeve, so as to effectively avoid scratches and pits on the inclined surface of the inner conical sleeve, further ensuring that the inner conical sleeve and the sealing ball are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve;

[0020] 4. In the present invention, when the rotating ring contacts the sealing ball, the valve body is brought into the closed state in advance. The fluid passes through several filter holes, and the impurity particles are filtered out. The fluid flushes the cleaning brushes, the surface of the sealing ball and the surface of the inner conical sleeve, so as to wash away the impurity particles attached to the cleaning brushes, the surface of the sealing ball and the surface of the inner conical sleeve, further effectively avoiding the existence of impurity particles between the annular contact surfaces of the inner conical sleeve and the sealing ball, further ensuring that the inner conical sleeve and the sealing ball are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve;

[0021] 5. In the present invention, when the valve body is in the discharge state, the driving member is located at the second convex ring. At this time, the movable ring also drives the rotating ring to move towards the sealing ball, causing several groups of cleaning brushes to be carried out by the rotating ring and inclined towards the inner side of the inner conical sleeve. At the same time, the cleaning brushes rotate, and the rotating several groups of cleaning brushes can protect the inclined surface of the inner conical sleeve. That is, when the valve body is in the discharge state, the inclined surface of the inner conical sleeve is protected by several groups of cleaning brushes, preventing impurity particles in the fluid from directly contacting the inclined surface of the inner conical sleeve, thereby effectively avoiding scratches and pits on the inclined surface of the inner conical sleeve, further ensuring that the inner conical sleeve and the sealing ball are in a completely closed state after contact, effectively preventing fluid leakage, and further ensuring the sealing performance of the discharge valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic cross-sectional structure diagram when the valve body is closed;

[0023] Figure 2 is a schematic cross-sectional structure diagram when the valve body is opened;

[0024] Figure 3 is a schematic connection structure diagram of the driving member, the protective member and the inner conical sleeve;

[0025] Figure 4 is a schematic disassembled structure diagram of the driving member, the protective member and the inner conical sleeve;

[0026] Figure 5 is a schematic structure diagram of the driving member and the protective member;

[0027] Figure 6 is Figure 5 an enlarged structure diagram at position C in

[0028] Figure 7 is Figure 1 an enlarged structure diagram at position A in

[0029] Figure 8 is Figure 2 an enlarged structure diagram at position B in

[0030] In the figure:

[0031] 1. Union tee; 2. Union elbow; 3. Upper end cover; 4. Outer cylinder; 41. Ball cage; 42. Positioning block; 43. First convex ring; 44. Second convex ring; 5. Lower end cover; 6. Sealing ball; 7. Inner conical sleeve; 71. Limit ring; 8. Core shaft; 81. Piston; 9. Spring; 91. Steel ball; 10. Driving member; 101. Movable rod; 102. Pulling spring; 11. Protective member; 111. Movable ring; 112. Rotating ring; 1121. Turbine blade; 1122. Cleaning brush; 1123. Filter hole; 113. Connecting piece; 12. Plug one; 13. Plug two; 14. Plug three; 15. Filter element. DETAILED DESCRIPTION OF THE INVENTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] As Figures 1 - 8 shown, a super-high pressure emergency relief valve includes a union tee 1, a union elbow 2, an upper end cover 3, an outer cylinder 4, a lower end cover 5, a sealing ball 6, an inner conical sleeve 7, a core shaft 8, a piston 81, a plug one 12, a plug two 13, and a plug three 14. The relief valve further includes:

[0034] A protective member 11, which includes a movable ring 111 and a rotating ring 112. A limiting ring 71 is provided around the outer periphery of the inner conical sleeve 7. The movable ring 111 is movably sleeved between the inner conical sleeve 7 and the limiting ring 71. A rotating ring 112 is rotatably installed at one end of the movable ring 111 close to the sealing ball 6.

[0035] A driving member 10. A plurality of groups of driving members 10 are installed between the movable ring 111 and the inner conical sleeve 7. The driving member 10 includes two movable rods 101 and a tension spring 102. The two movable rods 101 are hinged together. The movable ends of the two movable rods 101 are respectively hinged to the end of the movable ring 111 and the outer surface of the inner conical sleeve 7. A tension spring 102 is installed between the two movable rods 101.

[0036] A first convex ring 43. An annular first convex ring 43 is provided inside the outer cylinder 4. When the tension spring 102 is in a normal state, the diameter of the outermost sides of the two movable rods 101 is greater than the inner diameter of the first convex ring 43.

[0037] In a case of this embodiment, the first plug 12 and the second plug 13 are respectively connected to the liquid inlet end and the liquid outlet end of the external liquid control box. A pressure sensor is installed at the third plug 14. When the pressure inside the valve body reaches the rated working pressure, the pressure sensor feeds back a signal to the liquid control system, and hydraulic liquid is injected into the cavity corresponding to the piston 81 through the liquid inlet end of the external liquid control box, causing the piston 81 to move. The piston 81 drives the mandrel 8 and the inner conical sleeve 7 to move away from the sealing ball 6. At this time, the valve body is in a discharge state, and the fluid enters the inner conical sleeve 7 through the ball cage 41, and then is discharged from the lower end cover 5 through the mandrel 8 to achieve emergency discharge. When the pressure inside the valve body is lower than the rated working pressure, hydraulic liquid is injected into the other side of the cavity corresponding to the piston 81 through the liquid outlet end of the external liquid control box, and the original hydraulic liquid in the cavity returns to the external liquid control box through the liquid inlet end of the external liquid control box. In this way, the piston 81 moves in the opposite direction, so that the piston 81 drives the mandrel 8 and the inner conical sleeve 7 to move towards the sealing ball 6. When the inner conical sleeve 7 contacts the sealing ball 6, the valve body is in a closed state at this time. In the present invention, a balance pipeline can also be connected between the first plug 12 and the third plug 14. A rupture disc is arranged in the middle of the balance pipeline. When the internal pressure of the valve body exceeds the rated working pressure, part of the fluid enters the balance pipeline and causes the rupture disc to rupture. Part of the fluid enters the cavity corresponding to the piston 81 through the first plug 12, thereby pushing the piston 81 to move, so that the inner conical sleeve 7 moves away from the sealing ball 6, and the valve body is in a discharge state. In this way, automatic discharge can be realized, and the opening and closing of the valve body can be flexibly controlled in cooperation with the liquid control system to ensure the reliability of pressure control.

[0038] In the actual application of this embodiment, when the inner conical sleeve 7 moves towards the sealing ball 6, the driving member 10 gradually approaches the first convex ring 43. When the hinged ends of the two movable rods 101 contact the first convex ring 43, the two movable rods 101 will move inward under the extrusion of the first convex ring 43. In this way, one of the movable rods 101 will drive the movable ring 111 to move towards the sealing ball 6. In this way, before the inner conical sleeve 7 contacts the sealing ball 6, the rotating ring 112 on the movable ring 111 first contacts the sealing ball 6, so that the valve body can be closed in advance, and the fluid no longer passes through the inner conical sleeve 7. At the same time, the inner conical sleeve 7 is still moving towards the sealing ball 6. When the inner conical sleeve 7 contacts the sealing ball 6, the driving member 10 passes over the first convex ring 43, and through the resilience of the tension spring 102, the movable ring 111 and the rotating ring 112 are reset. In this way, before the inner conical sleeve 7 is about to contact the sealing ball 6, no fluid passes through, so that there are not likely to be impurity particles between the annular contact surfaces of the inner conical sleeve 7 and the sealing ball 6, thereby ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and thus ensuring the sealing performance of the relief valve.

[0039] Further, a turbine blade 1121 is arranged on the periphery of the rotating ring 112, and several groups of cleaning brushes 1122 are arranged on the inner side of the rotating ring 112.

[0040] In actual application of this embodiment, when the movable ring 111 drives the rotating ring 112 to move towards the sealing ball 6, several groups of cleaning brushes 1122 are carried out by the rotating ring 112. Since there is still fluid passing through before the rotating ring 112 contacts the sealing ball 6, these fluids impact the turbine blades 1121 to drive the rotating ring 112 to rotate. Moreover, under the scouring of the fluids, several groups of cleaning brushes 1122 incline towards the inner side of the inner conical sleeve 7, so that the rotating ring 112 drives several groups of inclined cleaning brushes 1122 to rotate. The rotation of the cleaning brushes 1122 can clean the inclined surface of the inner conical sleeve 7, that is, the surface of the inner conical sleeve 7 to be in contact with the sealing ball 6, and can clean the impurity particles attached to the inclined surface, effectively avoiding the existence of impurity particles between the inner conical sleeve 7 and the sealing ball 6 and the annular contact surface between the inner conical sleeve 7 and the sealing ball 6 after contact, thereby ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve;

[0041] Before the rotating ring 112 is about to contact the sealing ball 6, the rotating ring 112 is still in a rotating state. In this way, when the rotating ring 112 contacts the sealing ball 6, due to inertia, the rotating ring 112 will continue to rotate a certain angle. In this way, several groups of cleaning brushes 1122 will clean the impurity particles attached to the surface of the sealing ball 6, further effectively avoiding the existence of impurity particles between the inner conical sleeve 7 and the sealing ball 6 and the annular contact surface between the inner conical sleeve 7 and the sealing ball 6 after contact, further ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve;

[0042] When the inner conical sleeve 7 moves towards the sealing ball 6, the flow channel between the inner conical sleeve 7 and the sealing ball 6 gradually becomes narrower, which will cause the velocity of the fluid to surge. After the fluid velocity increases, the impact force of the impurity particles contained in the fluid on the inclined surface of the inner conical sleeve 7 will become larger, which is likely to cause scratches or pits on the inclined surface of the inner conical sleeve 7, resulting in an incompletely closed state after the inner conical sleeve 7 and the sealing ball 6 are in contact; Since the cleaning brushes 1122 incline towards the inclined surface of the inner conical sleeve 7 and the cleaning brushes 1122 are in a rotating state, several groups of cleaning brushes 1122 can protect the inclined surface of the inner conical sleeve 7, avoiding the direct contact between the impurity particles and the inclined surface of the inner conical sleeve 7, thereby effectively avoiding scratches and pits on the inclined surface of the inner conical sleeve 7, further ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve.

[0043] Furthermore, several filtering holes 1123 are formed in the periphery of the rotating ring 112.

[0044] In actual application of this embodiment, when the swivel ring 112 contacts the sealing ball 6, the valve body is pre-closed. Since impurity particles may adhere to the cleaning brush 1122 when the cleaning brush 1122 cleans the inner conical sleeve 7 and the sealing ball 6, when the inner conical sleeve 7 slowly contacts the sealing ball 6, that is, when the cleaning brush 1122 is retracted, the impurity particles on the cleaning brush 1122 may fall between the annular contact surfaces of the inner conical sleeve 7 and the sealing ball 6. This may cause impurity particles to be stuck between the annular contact surfaces of the inner conical sleeve 7 and the sealing ball 6 when the inner conical sleeve 7 contacts the sealing ball 6, resulting in an incomplete closed state after the inner conical sleeve 7 and the sealing ball 6 contact; at this time, the fluid passes through a number of filter holes 1123, and the impurity particles are filtered out, so that the fluid flushes the cleaning brush 1122, the surface of the sealing ball 6 and the surface of the inner conical sleeve 7, thereby flushing away the impurity particles adhering to the cleaning brush 1122, the sealing ball 6 and the surface of the inner conical sleeve 7, further effectively avoiding the presence of impurity particles between the annular contact surfaces of the inner conical sleeve 7 and the sealing ball 6, further ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve.

[0045] Furthermore, an annular second convex ring 44 is further arranged in the outer cylinder 4. The second convex ring 44 is far from the sealing ball 6, and the first convex ring 43 is located between the sealing ball 6 and the second convex ring 44.

[0046] In actual application of this embodiment, when the valve body is in the relief state, the driving member 10 is located at the second convex ring 44. At this time, the movable ring 111 also drives the swivel ring 112 to move towards the sealing ball 6, so that a number of groups of cleaning brushes 1122 are taken out by the swivel ring 112. Through the flushing of the fluid, a number of groups of cleaning brushes 1122 are inclined towards the inner side of the inner conical sleeve 7. At the same time, the swivel ring 112 drives a number of groups of inclined cleaning brushes 1122 to rotate. In this way, the rotating a number of groups of cleaning brushes 1122 can protect the inclined surface of the inner conical sleeve 7. That is, when the valve body is in the relief state, the inclined surface of the inner conical sleeve 7 is protected by a number of groups of cleaning brushes 1122, avoiding the impurity particles in the fluid from directly contacting the inclined surface of the inner conical sleeve 7, thereby effectively avoiding scratches and pits on the inclined surface of the inner conical sleeve 7, further ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve;

[0047] When the inner conical sleeve 7 moves towards the sealing ball 6, the driving member 10 slowly moves over the second convex ring 44 and towards the first convex ring 43. When resisting the driving member 10 from moving over the second convex ring 44, the movable ring 111 drives the rotating ring 112 to reset, causing several groups of cleaning brushes 1122 to be retracted. At the same time, the rotating ring 112 is still in a rotating state, so that the cleaning brushes 1122 also rotate accordingly. When the cleaning brushes 1122 rotate, the impurity particles attached to their own surfaces can be cleaned off. In this way, when the cleaning brushes 1122 are taken out again and contact the inclined surface of the inner conical sleeve 7 or the surface of the sealing ball 6, the cleaning brushes 1122 remain clean, which can ensure the cleaning effect of the cleaning brushes 1122 on the inclined surface of the inner conical sleeve 7 and the surface of the sealing ball 6, thereby further ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve.

[0048] Furthermore, the cleaning brushes 1122 are elastically installed on the inner wall of the rotating ring 112, and the cleaning brushes 1122 always tend to incline away from the sealing ball 6.

[0049] In actual application of this embodiment, when the cleaning brushes 1122 are taken out by the rotating ring 112, the cleaning brushes 1122 themselves will incline towards the inclined surface of the inner conical sleeve 7, and with the assistance of the scouring of the fluid, they will further incline towards the inclined surface of the inner conical sleeve 7. This can ensure the cleaning effect and protection effect of several groups of cleaning brushes 1122, thereby ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and further ensuring the sealing performance of the relief valve.

[0050] As Figure 1 and Figure 2 shown, a filter element 15 is installed inside the union cross 2.

[0051] In actual application of this embodiment, when the fluid is at the union cross 2, it is filtered by the filter element 15, and the larger impurity particles in the fluid are filtered out, preventing these larger impurity particles from directly damaging the sealing ball 6 and the inner conical sleeve 7, thereby ensuring that the inner conical sleeve 7 and the sealing ball 6 are in a completely closed state after contact, effectively avoiding fluid leakage, and ensuring the sealing performance of the relief valve.

[0052] As Figure 1 and Figure 2 shown, several groups of springs 9 are installed inside the lower end cover 5. One end of the spring 9 is provided with a steel ball 91, and a card slot is formed on the periphery of the core shaft 8, and the steel ball 91 is stuck in the card slot.

[0053] In actual application of this embodiment, when the valve body is in the closed state, the steel ball 91 on the spring 9 is stuck in the card slot of the mandrel 8. With the strong elastic force of the spring 9 itself and the extrusion force of the hydraulic fluid on the piston 81, the position of the mandrel 8 is fixed, thereby ensuring that the sealing ball 6 and the inner conical sleeve 7 are completely closed, effectively avoiding fluid leakage and ensuring the sealing performance of the relief valve.

[0054] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A super high pressure emergency relief valve, comprising a union tee (1), a union elbow (2), an upper end cover (3), an outer cylinder (4), a lower end cover (5), a sealing ball (6), an inner tapered sleeve (7), a core shaft (8), a piston (81), a plug one (12), a plug two (13) and a plug three (14), characterized in that, The drain valve further includes: A protective member (11), the protective member (11) includes a movable ring (111) and a rotating ring (112). A limiting ring (71) is provided on the outer periphery of the inner conical sleeve (7). The movable ring (111) is movably sleeved between the inner conical sleeve (7) and the limiting ring (71). A rotating ring (112) is rotatably installed at one end of the movable ring (111) close to the sealing ball (6); A driving member (10), several groups of driving members (10) are installed between the movable ring (111) and the inner conical sleeve (7). The driving member (10) includes two movable rods (101) and a tension spring (102). The two movable rods (101) are hinged together. The movable ends of the two movable rods (101) are respectively hinged to the end of the movable ring (111) and the outer surface of the inner conical sleeve (7). A tension spring (102) is installed between the two movable rods (101); A first convex ring (43), an annular first convex ring (43) is provided in the outer cylinder (4). When the tension spring (102) is in a normal state, the outer diameter of the outermost sides of the two movable rods (101) is greater than the inner diameter of the first convex ring (43).

2. The ultra-high pressure emergency relief valve according to claim 1, wherein, A turbine blade (1121) is provided on the outer periphery of the rotating ring (112), and several groups of cleaning brushes (1122) are provided on the inner side of the rotating ring (112).

3. The ultra-high pressure emergency relief valve according to claim 2, characterized in that, Several filtering holes (1123) are opened on the outer periphery of the rotating ring (112).

4. The ultra-high pressure emergency relief valve according to claim 3, wherein An annular second convex ring (44) is further provided in the outer cylinder (4). The second convex ring (44) is away from the sealing ball (6), and the first convex ring (43) is located between the sealing ball (6) and the second convex ring (44).

5. The ultra-high pressure emergency relief valve according to claim 4, characterized in that, The cleaning brush (1122) is elastically installed on the inner wall of the rotating ring (112), and the cleaning brush (1122) always has a tendency to tilt away from the sealing ball (6).

6. The ultra-high pressure emergency relief valve according to claim 1, characterized in that, A filtering member (15) is installed in the union cross (2).

7. The ultra-high pressure emergency relief valve according to claim 1, characterized in that, Several groups of springs (9) are installed in the lower end cover (5). One end of the spring (9) is provided with a steel ball (91). A card slot is opened on the outer periphery of the core shaft (8), and the steel ball (91) is stuck in the card slot.

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