A flexible pipe connector

Abstract

The present invention relates to the technical field of pipeline connectors, and discloses a flexible pipeline connector, comprising a joint body, a ball valve connected to the joint body, an annular dovetail groove provided on the joint body, the annular dovetail groove close to the spherical opening of the ball valve, an O-ring provided in the annular dovetail groove, a pressing piece connected between the joint body and the ball valve, an oil filling groove provided on the joint body, the oil filling groove for injecting sealing grease, the oil filling groove being located between the annular dovetail groove and the pressing piece, an oil inlet cavity, a transfer cavity and an oil outlet cavity connected in sequence provided in the valve body of the ball valve, the sealing grease enters the transfer cavity through the oil inlet cavity and enters the oil outlet cavity through the transfer cavity; by providing cavities respectively connected to the pressing piece and the annular dovetail groove in the ball valve, the function of transporting the sealing grease to the pressing piece and the annular dovetail groove is realized, thereby extending the service life of the pressing piece and the O-ring in the annular dovetail groove.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline connectors, in particular to a flexible pipeline connector. Background Art

[0002] Submarine crude oil pipelines need to operate for a long time in a high-pressure, low-temperature, and highly corrosive environment. The reliability of their connectors is directly related to the safety of oil and gas transportation and the protection of marine ecology.

[0003] The deep-sea environment is subject to complex dynamic loads. When the seabed topography changes suddenly or the ocean current accelerates (such as submarine canyons and steep slope areas), the pipeline is lifted by the lift effect, causing the connector to bear axial tensile force, resulting in a micro-gap between the joint body and the sealing surface of the ball valve. At this time, the crude oil flow rate accelerates, aggravating the erosion of the sealing interface, and the crude oil rushes into the annular dovetail groove, accelerating the aging of the O-ring; when the seabed undercurrent is washed or the platform is loaded by gravity, the pipeline sinks locally and the connector is subjected to compressive stress, resulting in a sharp increase in the friction between the contact surface of the pressure plate and the ball valve, causing the pressure plate to wear or even deform. When the pipeline connector has an airtightness problem, the existing grease injection system can only replenish the sealing grease in one direction, and cannot deal with both O-ring corrosion and pressure plate wear problems at the same time. It can only serve as a temporary maintenance function and cannot extend the service life of the flexible pipeline in the complex deep-sea environment. Summary of the Invention

[0004] To this end, the purpose of the present invention is to overcome the problem in the prior art that sealing grease can only temporarily maintain air tightness but cannot protect the O-ring and pressing piece inside the joint body in the complex deep-sea environment, and to provide a flexible pipe connector. By setting an oil inlet cavity and an oil outlet cavity connected to the oil filling groove, the sealing grease is transported to the surface of the pressing piece and the surface of the O-ring for attachment according to different deep-sea environments, thereby improving the service life of the joint body.

[0005] In order to solve the above technical problems, the present invention provides a flexible pipe connector, including a joint body, a ball valve connected to the joint body, an annular dovetail groove provided on the joint body, the annular dovetail groove close to the spherical opening of the ball valve, an O-ring provided in the annular dovetail groove, a pressing piece connected between the joint body and the ball valve, an oil filling groove provided on the joint body, the oil filling groove for injecting sealing grease, the oil filling groove being located between the annular dovetail groove and the pressing piece, and an oil inlet cavity, a transfer cavity and an oil outlet cavity connected in sequence provided in the valve body of the ball valve.

[0006] The sealing grease enters the transfer cavity through the oil inlet cavity and enters the oil outlet cavity through the transfer cavity;

[0007] When the ball valve rotates in a first direction, the oil outlet cavity is connected to the annular dovetail groove, and when the ball valve rotates in a second direction, the outlet of the oil outlet cavity is connected to the bottom surface of the pressing plate;

[0008] Among them, when the sealing grease is discharged into the gap between the pressing plate and the ball valve, it is used to lubricate the connecting surface between the pressing plate and the ball valve. When the sealing grease is discharged into the annular dovetail groove, it is used to isolate crude oil from contacting the surface of the O-ring.

[0009] In one embodiment of the present invention, two oil inlet cavities are provided, and the two oil inlet cavities are respectively provided on both sides of the oil filling groove.

[0010] In one embodiment of the present invention, a sealing assembly is provided in the transfer cavity, which includes a sealing plug, and the sealing plug is used to seal the oil inlet cavity and the oil outlet cavity.

[0011] In one embodiment of the present invention, the sealing assembly further comprises:

[0012] A rotating plate has four sealing plugs fixed on its surface, wherein the four sealing plugs are grouped in two and fixed on two opposite surfaces of the rotating plate respectively;

[0013] A rotating shaft, rotatably connected to the rotating piece;

[0014] When the spherical valve rotates toward the first direction or the second direction, the rotating plate rotates around the rotating shaft under the action of gravity and blocks the corresponding oil inlet cavity and the oil outlet cavity through the sealing plug.

[0015] In one embodiment of the present invention, a micro-magnetic sheet is provided on the surface of the sealing plug inserted into the oil inlet cavity or the oil outlet cavity, and micro-magnets for adsorbing the micro-magnetic sheet are fixed in the oil inlet cavity and the oil outlet cavity, and the magnetic attraction force between the micro-magnetic sheet and the micro-magnet is less than the gravity of the sealing assembly.

[0016] In one embodiment of the present invention, the cross-sectional diameter of the oil inlet cavity is greater than the cross-sectional diameter of the oil outlet cavity.

[0017] In one embodiment of the present invention, the deflection angles of the two oil inlet cavities relative to the central axis of the oil filling groove are equal.

[0018] In one embodiment of the present invention, a mesh-shaped micro-channel is provided on the contact surface between the pressing sheet and the spherical valve.

[0019] In one embodiment of the present invention, an oil injection mechanism is fixed on the joint body, which includes:

[0020] an oil filling pipeline connected to the oil filling tank;

[0021] An oil filling container is fixed in the oil filling pipeline, and the oil filling container blocks the oil filling pipeline.

[0022] In one embodiment of the present invention, an inductive pressure pump is fixed on the oil filling container, which is manually pressed to pressurize the sealing grease in the oil filling container, driving the sealing grease into the oil filling groove. A liquid level sensor connected to the inductive pressure pump is fixed in the transfer chamber. When the transfer chamber is filled with sealing grease, the liquid level sensor is started. When the liquid level sensor detects that the liquid level in the transfer chamber is lower than the warning value, the inductive pressure pump is locked and cannot be pressed down.

[0023] The above technical solution of the present invention has the following beneficial effects compared with the prior art:

[0024] The flexible pipe connector of the present invention is provided with an oil filling groove for injecting sealing grease on the ball valve, and is respectively provided with an oil inlet cavity, a transfer cavity, and an oil outlet cavity connected to the oil filling groove. The oil inlet cavity is connected to the oil filling groove, and the sealing grease in the oil filling groove is injected into the transfer cavity. The oil outlet cavities are connected to different positions on the ball valve. Therefore, the direction of the oil outlet cavity can be switched by the rotation of the ball valve during use, and the sealing grease in the transfer cavity can be driven into different parts on the ball valve.

[0025] Among them, the rotation direction of the ball valve is divided into a first direction and a second direction. When it is rotated in the first direction, the flow rate of crude oil is accelerated, and it is easier to enter the annular dovetail groove and corrode the O-ring. At this time, the oil outlet cavity is connected to the annular dovetail groove. At this time, the sealing grease enters the annular dovetail groove and adheres to the surface of the O-ring, preventing the transported crude oil from entering the annular dovetail groove and corroding the O-ring. When the ball valve rotates in the second direction, the friction force on the pressing plate is enhanced. At this time, the oil outlet cavity is connected to the bottom surface of the pressing plate, and the sealing grease enters the gap between the pressing plate and the ball valve, reducing the friction between the ball valve and the pressing plate and playing a lubricating role. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0027] Figure 1 This is a structural schematic diagram of a flexible pipe connector in a preferred embodiment of the present invention;

[0028] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This is a schematic structural diagram of the sealing assembly part in a preferred embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the rotation direction of the spherical valve when rotating toward the first direction in the present invention;

[0032] Figure 6 It is a schematic diagram of the rotation direction of the spherical valve when it rotates toward the second direction in the present invention.

[0033] Description of the accompanying drawings:

[0034] 1. Connector body; 11. Annular dovetail groove; 111. O-ring; 12. Pressing piece; 13. Oil filling groove; 14. Oil filling mechanism; 141. Oil filling pipe; 142. Oil filling container; 143. Induction pressure pump;

[0035] 2. Ball valve; 21. Oil inlet cavity; 22. Transfer cavity; 23. Oil outlet cavity;

[0036] 3. Sealing assembly; 31. Sealing plug; 32. Rotating piece; 33. Rotating shaft;

[0037] A1, first direction; A2, second direction. DETAILED DESCRIPTION

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0039] The purpose of the embodiments of the present invention is that the environment deep under the sea is complex and the ocean currents vary greatly. The changes in the environment cause the ball valve 2 to produce different states, and therefore the problems of airtightness failure are also different. When there is an airtightness problem in the joint body 1, the sealing grease can only maintain basic airtightness repair in different states of the ball valve 2, and cannot maintain the airtightness problem according to the environment for a long time. Therefore, it is necessary to provide a switchable oil outlet cavity 23 on the ball valve 2, and connect the oil filling groove 13 to inject the sealing grease into the surface of the O-ring 111 and the pressing plate 12 respectively to adhere to the surface, so as to deal with the airtightness problem in the complex seabed environment.

[0040] refer to Figure 1 、 23. Specifically, a flexible pipe connector is provided, including a joint body 1, a spherical valve 2 is connected to the joint body 1, an annular dovetail groove 11 is provided on the joint body 1, the annular dovetail groove 11 is close to the spherical opening of the spherical valve 2, an O-ring 111 is provided in the annular dovetail groove 11, a pressing piece 12 is connected between the joint body 1 and the spherical valve 2, an oil filling groove 13 is provided on the joint body 1, the oil filling groove 13 is used to inject sealing grease, and the oil filling groove 13 is located between the annular dovetail groove 11 and the pressing piece 12.

[0041] refer to Figure 1 、 2 3. A cavity is provided in the joint body 1, in which a pipeline for transporting crude oil is fixed, and the end of the ball valve 2 is also fixed with the pipeline for transporting crude oil. The flow direction of crude oil in the pipeline is along the joint body 1 toward the end of the ball valve 2, wherein an O-ring 111 is fixed inside the annular dovetail groove 11 opened on the joint body 1. The O-ring 111 is made of industrial rubber, has a circular cross-section and has elastic deformation performance, and contacts the inner wall of the annular dovetail groove 11 to block the crude oil entering through the opening of the ball valve 2, thereby achieving a sealing effect; a pressing plate 12 is connected between the joint body 1 and the ball valve 2, and the pressing plate 12 is made of wear-resistant metal material (such as high manganese steel). It is spaced between the surface of the ball valve 2 and the inner wall of the joint body 1. When the ball valve 2 rotates, its surface rubs against the surface of the pressing plate 12 to prevent direct friction with the joint body 1, causing external seawater to flow into the interior of the joint body 1 and affect the crude oil transportation effect. The service life of the joint body 1 is extended by increasing the wear resistance.

[0042] refer to Figure 1 、 2 3. The oil filling groove 13 is provided between the pressing piece 12 and the annular dovetail groove 11. The groove body thereof is annularly covered on the surface of the ball valve 2. When the pipeline connector has an airtightness failure, resulting in internal crude oil leakage or external seawater entering the pipeline, the operator injects sealing grease into the oil filling groove 13 to maintain the sealing effect of the pipeline connector. When operating on the seabed, it can temporarily ensure the sealing of the pipeline connector, which is convenient for the operator to buy time for troubleshooting. The sealing grease is made of lipid oil or silicone oil.

[0043] refer to Figure 1 、 2, 3, 5, 6, the valve body of the ball valve 2 is provided with an oil inlet cavity 21, a transfer cavity 22 and an oil outlet cavity 23 which are connected in sequence. There are two oil inlet cavities 21, and the two oil outlet cavities 23 are respectively arranged on both sides of the oil filling groove 13. The sealing grease enters the transfer cavity 22 through the oil inlet cavity 21 and enters the oil outlet cavity 23 through the transfer cavity 22; when the ball valve 2 rotates in the first direction A1, the oil outlet cavity 23 is connected to the annular dovetail groove 11, and when the ball valve 2 rotates in the second direction A2, the outlet of the oil outlet cavity 23 is connected to the bottom surface of the pressing plate 12; wherein, when the sealing grease is discharged into the gap between the pressing plate 12 and the ball valve 2, it is used to lubricate the connecting surface between the pressing plate 12 and the ball valve 2, and when the sealing grease is discharged into the annular dovetail groove 11, it is used to isolate the crude oil from contacting the surface of the O-ring 111.

[0044] refer to Figure 1 、 2 , 3, 5, 6, the oil inlet channel 21 is connected to the oil filling groove 13, and is arranged as two symmetrical ones. By rotating the ball valve 2, the oil inlet channel 21 can be driven to change its position, thereby switching between the two states of being misaligned with the oil filling groove 13 and being connected to the oil filling groove 13, thereby achieving the effect of adjusting according to the environment. The two oil inlet channels 21 are connected to the oil filling groove 13 in the first direction A1 and the second direction A2, respectively, and the first direction A1 and the second direction A2 are opposite, so they are arranged on both sides of the oil filling groove 13, corresponding to the connection in the first direction A1 and the connection in the second direction A2, respectively; when the oil inlet channel 21 is connected, the sealing grease in the oil filling groove 13 enters the oil inlet channel 21 and flows into the transfer chamber 22, and enters the oil outlet channel 23 again.

[0045] refer to Figure 1 、 2 , 3, 5, 6. When the ball valve 2 rotates in the first direction A1, the oil outlet channel 23 is connected to the annular dovetail groove 11. At this time, when the sealing grease enters the transfer chamber 22, it will be discharged into the annular dovetail groove 11 through the oil outlet channel 23, and cover the surface of the O-ring 111 in the annular dovetail groove 11, isolating the crude oil entering the annular dovetail groove 11 to prevent it from corroding the O-ring 111. When the ball valve 2 rotates in the second direction A2, the oil outlet channel 23 is connected to the bottom of the pressing plate 12, and the sealing grease enters the gap between the pressing plate 12 and the surface of the ball valve 2 through the transfer chamber 22. At this time, when the ball valve 2 rotates slightly due to environmental factors, there is sealing grease lubrication between the surface of the pressing plate 12 and the surface of the ball valve 2, which reduces the friction between the surface of the pressing plate 12 and the surface of the ball valve 2 and improves the service life of the pressing plate 12.

[0046] refer to Figure 2 、 3, 4, 5, 6, a sealing assembly 3 is set in the transfer chamber 22, which includes a sealing plug 31, which is used to seal the oil inlet cavity 21 and the oil outlet cavity 23; a rotating piece 32, four sealing plugs 31 are fixed on its surface, and two of the four sealing plugs 31 are fixed in groups on two opposite surfaces of the rotating piece 32; a rotating shaft 33, and is rotatably connected to the rotating piece 32; when the ball valve 2 rotates toward the first direction A1 or the second direction A2, the rotating piece 32 rotates around the rotating shaft 33 under the action of gravity and seals the corresponding oil inlet cavity 21 and oil outlet cavity 23 through the sealing plug 31; a micro magnetic piece is provided on the surface of the sealing plug 31 inserted into the oil inlet cavity 21 or the oil outlet cavity 23, and micro magnets for adsorbing the micro magnetic pieces are fixed in the oil inlet cavity 21 and the oil outlet cavity 23, and the magnetic attraction force between the micro magnetic piece and the micro magnet is less than the gravity of the sealing assembly 3.

[0047] refer to Figure 2 、 3 , 4, 5, 6. When the ball valve 2 rotates, in order to ensure that the sealing grease in the transfer chamber 22 does not enter the wrong cavity, a sealing assembly 3 is set in the transfer chamber 22, including four sealing plugs 31. The four sealing plugs 31 correspond to the two oil inlet cavities 21 and the two oil outlet cavities 23 respectively. The size of the four sealing plugs 31 can extend into and seal the oil inlet cavities 21 and the oil outlet cavities 23; the sealing assembly 3 also includes a rotating piece 32. Two sealing plugs 31 are fixed on the two opposite surfaces of the rotating piece 32, facing the oil inlet cavity 21 and the oil outlet cavity 23 in different directions. A smooth guide surface is provided on the entrance surface of the sealing plug 31, so that the sealing plug 31 can slide into the oil inlet more easily. The cavity 21 or the oil outlet cavity 23; the sealing assembly 3 also includes a rotating shaft 33, and the rotating plate 32 is rotatably connected to the rotating shaft 33. When the ball valve 2 rotates, no matter whether the ball valve 2 rotates toward the first direction A1 or the second direction A2, the rotating plate 32 will be driven to rotate around the rotating shaft 33 under the action of gravity, and the two sealing plugs 31 will be driven to approach their corresponding oil inlet cavity 21 and oil outlet cavity 23, and slide into the corresponding oil inlet cavity 21 and oil outlet cavity 23 under the guidance of the guide surface. At this time, the sealing grease in the transfer cavity 22 will not enter the blocked oil inlet cavity 21 and oil outlet cavity 23, but will only enter the oil outlet cavity 23 where the sealing grease needs to enter.

[0048] refer to Figure 2 、 3, 4, 5, 6, a micro-magnetic piece is fixed on the surface of the sealing plug 31 inserted into the oil inlet cavity 21 or the oil outlet cavity 23, and a micro-magnet that can produce a magnetic attraction effect with the micro-magnetic piece is arranged in the oil inlet cavity 21 and the oil outlet cavity 23, and its position will not affect the entry depth of the sealing plug 31. When the sealing plug 31 is close to the outlet of the oil inlet cavity 21 and the entrance of the oil outlet cavity 23, a magnetic attraction effect is generated between the micro-magnetic piece and the micro-magnet, which assists the sealing plug 31 to enter the oil inlet cavity 21 or the oil outlet cavity 23. In order to ensure that the sealing plug 31 can smoothly slide out of the oil inlet cavity 21 and the oil outlet cavity 23 when the ball valve 2 rotates and resets, the magnetic attraction force between the micro-magnetic piece and the micro-magnet is less than the gravity of the sealing component 3.

[0049] When the ball valve 2 rotates, one of the oil inlet channels 21 rotates to connect to the oil filling groove 13, and the oil outlet channel 23 has two situations depending on the direction of rotation, namely, connecting to the annular dovetail groove 11 and the bottom surface of the pressing plate 12. When connected to the annular dovetail groove 11, the oil inlet channel 21 and the oil outlet channel 23 located on the side close to the pressing plate 12 will be deflected at an angle to be close to the sealing plug 31 and the sealing plug 31 enters and blocks the oil inlet channel 21 and the oil outlet channel 23 in that direction through rotation. At this time, the micro-magnetic pieces on the oil inlet channel 21 and the oil outlet channel 23 are attracted to the micro-magnets on the surface of the sealing plug 31, and the sealing plug 31 is restricted by magnetic force so that it will not separate from the oil inlet channel 21 and the oil outlet channel 23 at this time. At this time, the grease in the oil filling groove 13 is blocked by the sealing plug 31 because the oil inlet channel 21 and the oil outlet channel 23 in the direction close to the pressing plate 12 are both blocked by the sealing plug 31. The grease in the oil pump 21 will not flow into the oil inlet channel 21 and the oil outlet channel 23 in this direction, and the grease in the oil pump 21 will only flow from the oil filling groove 13 into the oil inlet channel 21 connected to the oil filling groove 13 at this time, and then into the transfer chamber 22, and then into the oil outlet channel 23 connected to the annular dovetail groove 11. The grease is transported to the annular dovetail groove 11 under pressure from above the oil filling groove 13; on the contrary, when the oil outlet channel 23 is connected to the bottom of the pressing plate 12, the sealing plug 31 will seal the oil inlet channel 21 and the oil outlet channel 23 close to the annular dovetail groove 11 under the rotation of the ball valve 2, and then limit the position of the micro-magnet on the sealing plug 31 in this direction with the micro-magnetic pieces in the oil inlet channel 21 and the oil outlet channel 23, so as to prevent grease from entering the oil inlet channel 21 and the oil outlet channel 23 that are not needed and causing grease leakage and waste.

[0050] refer to Figure 2 、 3 The cross-sectional diameter of the oil inlet channel 21 is greater than the cross-sectional diameter of the oil outlet channel 23. When the sealing grease is injected into the oil filling groove 13, when the injection pressure is the same, the injection rate of the sealing grease in the oil inlet channel 21 is greater than the injection rate of the sealing grease in the oil outlet channel 23, thereby exerting pressure on the sealing grease in the transfer chamber 22. When it enters the oil outlet channel 23, it will be subjected to greater pressure and thrust, which assists the sealing grease to enter the oil outlet channel 23.

[0051] refer to Figure 2 、 3 The deflection angles of the two oil inlet channels 21 relative to the central axis of the oil filling groove 13 are equal. When the ball valve 2 rotates, whether it rotates toward the first direction A1 or the second direction A2, the rotation angle required for the two oil inlet channels 21 to communicate with the oil filling groove 13 is the same.

[0052] refer to Figure 2 、 3 In another embodiment, a mesh of micro-grooves is opened on the contact surface of the pressing plate 12 and the surface of the ball valve 2 by laser. When the sealing grease is injected into the gap between the pressing plate 12 and the surface of the ball valve 2, the sealing grease is absorbed by the mesh of micro-grooves under the capillary effect and covers the contact surface of the pressing plate 12 and the surface of the ball valve 2. The sealing grease gradually increases its coverage area along the extension direction of the micro-grooves and is evenly diffused on the contact surface of the pressing plate 12 and the surface of the ball valve 2, thereby enhancing the effective area of ​​the lubricating effect of the sealing grease.

[0053] refer to Figure 5 The joint body 1 is provided with an oil filling mechanism 14, which includes an oil filling pipe 141 connected to the oil filling groove 13; an oil filling container 142, which is fixed in the oil filling pipe 141, and the oil filling container 142 blocks the oil filling pipe 141; an inductive pressure pump 143 is fixed on the oil filling container 142, which is manually pressed and pressurizes the sealing grease in the oil filling container 142, driving the sealing grease into the oil filling groove 13, and a liquid level sensor connected to the inductive pressure pump 143 is fixed in the transfer chamber 22. When the transfer chamber 22 is filled with sealing grease, the liquid level sensor is started. When the liquid level sensor detects that the liquid level in the transfer chamber 22 is higher than the warning value, the inductive pressure pump 143 is locked and cannot be pressed down.

[0054] refer to Figure 5In order to inject sealing grease, an oil filling mechanism 14 is provided on the joint body 1, including an oil filling pipe 141 connected to the oil filling groove 13, an oil filling container 142 is fixed in the oil filling pipe 141, which blocks the oil filling pipe 141 to prevent seawater from entering the oil filling groove 13, a space for accommodating sealing grease is provided inside the oil filling container 142, and an inductive pressure pump 143 is provided on the oil filling container 142 to inject the sealing grease in the oil filling container 142 into the oil filling groove 13 through air pressure, a liquid level sensor is fixed in the transfer chamber 22, and the liquid level sensor senses the liquid level height of the sealing grease in the transfer chamber 22, which is fixed in the sealing chamber 22. After the transfer chamber 22 is filled with grease, it is started. When the liquid level in the transfer chamber 22 drops and is lower than the warning value, the sealing grease in the oil filling groove 13 has been completely injected, and there is not much sealing grease left in the transfer chamber 22. Most of it has entered the oil outlet channel 23. At this time, the induction pressure pump 143 is locked, and the operator cannot apply pressure to the induction pressure pump 143 again. At this time, most of the sealing grease has passed through the oil outlet channel 23 into the annular dovetail groove 11 or between the contact surface of the pressing piece 12 and the ball valve 2. The content of the sealing grease at the corresponding position can protect the pressing piece 12 or the O-ring 111.

[0055] During the use of the pipeline connector, when the joint body 1 has an airtightness problem, the operator starts the induction pressure pump 143 to inject sealing grease. At this time, the ball valve 2 is in a position after rotating in the first direction A1 or the second direction A2, so it corresponds to different positions of the oil outlet channel 23. When the ball valve 2 is in a position after rotating in the first direction A1, the main reason affecting the airtightness of the joint body 1 is that the downward pressure on the tail end of the ball valve 2 causes the crude oil flow rate to accelerate, corroding the O-ring 111. At this time, the sealing grease is injected into the annular dovetail groove 11 through the oil outlet channel 23 and adheres to the surface of the O-ring 111 in the annular dovetail groove 11. When crude oil enters the annular dovetail groove 11, it will be isolated by the sealing grease to prevent it from further corroding the O-ring 111; when the ball valve 2 is in the position after rotating in the second direction A2, the oil outlet cavity 23 is connected to the gap between the pressing plate 12 and the ball valve 2. At this time, the main reason affecting the air tightness of the joint body 1 is the wear of the pressing plate 12. At this time, the sealing grease enters the gap and adheres to the surface of the pressing plate 12, reducing the friction between the surface of the pressing plate 12 and the ball valve 2 and sealing the gap, thereby improving the wear resistance of the pressing plate 12. In summary, the protection effect of the joint body 1 with different functions of sealing grease is achieved according to different seabed conditions.

[0056] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A flexible pipe connector, comprising a connector body, a ball valve connected to the connector body, an annular dovetail groove provided on the connector body, the annular dovetail groove being adjacent to the spherical opening of the ball valve, an O-ring provided in the annular dovetail groove, a pressing piece connected between the connector body and the ball valve, an oil filling groove provided on the connector body, the oil filling groove being used to inject sealing grease, the oil filling groove being located between the annular dovetail groove and the pressing piece, characterized in that: The valve body of the ball valve is provided with an oil inlet cavity, a transfer cavity and an oil outlet cavity which are connected in sequence. The sealing grease enters the transfer cavity through the oil inlet cavity and enters the oil outlet cavity through the transfer cavity; When the ball valve rotates in a first direction, the oil outlet cavity is connected to the annular dovetail groove, and when the ball valve rotates in a second direction, the outlet of the oil outlet cavity is connected to the bottom surface of the pressing plate; Among them, when the sealing grease is discharged into the gap between the pressing plate and the ball valve, it is used to lubricate the connecting surface between the pressing plate and the ball valve. When the sealing grease is discharged into the annular dovetail groove, it is used to isolate crude oil from contacting the surface of the O-ring.

2. A flexible pipe connector according to claim 1, characterized in that: The oil inlet cavities are provided in two numbers, and the two oil inlet cavities are respectively provided on both sides of the oil filling groove.

3. A flexible pipe connector according to claim 2, characterized in that: A sealing assembly is provided in the transfer cavity, which includes a sealing plug, and the sealing plug is used to seal the oil inlet cavity and the oil outlet cavity.

4. A flexible pipe connector according to claim 3, characterized in that: The sealing assembly further includes, A rotating plate has four sealing plugs fixed on its surface, wherein the four sealing plugs are grouped in two and fixed on two opposite surfaces of the rotating plate respectively; A rotating shaft, rotatably connected to the rotating piece; When the spherical valve rotates toward the first direction or the second direction, the rotating plate rotates around the rotating shaft under the action of gravity and blocks the corresponding oil inlet cavity and the oil outlet cavity through the sealing plug.

5. The flexible pipe connector according to claim 4, characterized in that: A micro-magnetic sheet is provided on the surface of the sealing plug inserted into the oil inlet cavity or the oil outlet cavity, and micro-magnets for adsorbing the micro-magnetic sheet are fixed in the oil inlet cavity and the oil outlet cavity, and the magnetic attraction force between the micro-magnetic sheet and the micro-magnet is less than the gravity of the sealing assembly.

6. The flexible pipe connector according to claim 1, characterized in that: The cross-sectional diameter of the oil inlet cavity is greater than the cross-sectional diameter of the oil outlet cavity.

7. The flexible pipe connector according to claim 2, characterized in that: The deflection angles of the two oil inlet cavities relative to the central axis of the oil filling groove are equal.

8. The flexible pipe connector according to claim 1, characterized in that: A mesh-shaped micro-channel is provided on the surface where the pressing sheet contacts the spherical valve.

9. The flexible pipe connector according to claim 1, characterized in that: The joint body is provided with an oil injection mechanism, which includes: an oil filling pipeline connected to the oil filling tank; An oil filling container is fixed in the oil filling pipeline, and the oil filling container blocks the oil filling pipeline.

10. The flexible pipe connector according to claim 9, characterized in that: An inductive pressure pump is fixed on the oil filling container, which pressurizes the sealing grease in the oil filling container by manual pressing, driving the sealing grease into the oil filling groove. A liquid level sensor connected to the inductive pressure pump is fixed in the transfer chamber. When the transfer chamber is filled with sealing grease, the liquid level sensor is started. When the liquid level sensor detects that the liquid level in the transfer chamber is lower than the warning value, the inductive pressure pump is locked and cannot be pressed down.

Images