Pipeline connecting structure

Abstract

The invention relates to the technical field of fluid pipeline connection, and discloses a pipeline connection structure which is characterized in that one end of a plug is provided with a blocking plate, the plug is provided with a first radial flow channel, and the first radial flow channel is communicated with the inside and the outside of the plug; a plug cap is arranged at one end of the socket, a cavity is formed in the socket, an axial flow channel is formed between the plug cap and the inner wall of the socket, a second radial flow channel communicated with the cavity is formed in the socket, and the second radial flow channel is communicated with the axial flow channel; the plug is sleeved with the socket in a sealed and attached mode, the first radial flow channel is communicated with the second radial flow channel, and fluid freely flows in the plug, the first radial flow channel, the second radial flow channel, the axial flow channel and the socket. The plug bears the axial pressure of the fluid through the blocking plate, the stress direction is opposite to the disengaging direction, and the plug is prevented from disengaging; the plug cap bears the axial pressure of fluid, and the stress direction is opposite to the separation direction, so that the socket is prevented from falling off; meanwhile, the number of parts and connection complexity are reduced, and operation and maintenance are convenient.

Description

Technical Field

[0001] This invention relates to the field of fluid pipeline connection technology, and more specifically to a pipeline connection structure. Background Technology

[0002] Reliable connections are crucial for high-pressure fluid piping systems. As a core component connecting fluid lines, the pipe connector in a high-pressure fluid piping system functions primarily to achieve rapid, sealed connection and disconnection between the plug and socket. Currently, most mainstream pipe connectors employ a plug-in structure based on O-ring seals.

[0003] For the aforementioned plug-in structure, when high-pressure fluid is introduced into the high-pressure fluid pipeline system, the high-pressure fluid acts on the sealing surface and plug end face of the pipeline connector, generating a strong and axially separating reverse pull-out force. The magnitude of this reverse pull-out force is proportional to the working pressure of the high-pressure fluid and the effective pressure-bearing area of ​​the sealing surface.

[0004] To overcome the aforementioned shortcomings, existing technologies employ additional external mechanical fixing methods to reinforce pipe connectors, such as adding fuses, clamps, or threaded reinforcement sleeves, to prevent the connector plug from detaching from the socket. However, these external mechanical fixing measures not only increase the complexity and number of parts in the pipe connector, but also significantly reduce operational convenience and maintenance efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a pipe connection structure to solve the problem that existing measures that use additional external mechanical fixation to prevent pipe connectors from detaching not only increase the complexity and number of parts of the pipe connectors, but also significantly reduce the convenience of operation and maintenance efficiency.

[0006] This invention provides a pipe connection structure, comprising: The plug is tubular, with a stopper plate at one end and a first radial flow channel on the plug near the stopper plate, the first radial flow channel connecting the inside and outside of the plug; The socket is tubular, with a cap at one end near the socket. Inside the socket, on the part outside the cap, there is a cavity with one end open. An axial flow channel is provided between the cap and the inner wall of the socket. A second radial flow channel is provided at the cavity position on the socket and communicates with the cavity. The second radial flow channel communicates with the axial flow channel. The pipeline connection structure is adapted to seal and fit one end of the plug with a plug plate into the cavity of the socket, and the first radial flow channel is connected to the second radial flow channel, allowing fluid to flow freely within the plug, the first radial flow channel, the second radial flow channel, the axial flow channel, and the socket. Beneficial effects: This application adopts the above technical solution, where the plug plate bears the axial pressure of the fluid, with the force direction opposite to the disengagement direction, preventing the plug from falling off; the plug cap bears the axial pressure of the fluid, with the force direction opposite to the disengagement direction, preventing the socket from falling off; furthermore, it enables quick plugging and unplugging between the plug and socket in the pipeline connection structure, eliminating the need for additional fixing measures, eliminating the reverse disengagement force caused by high-pressure fluid, and preventing the plug and socket from separating during use; simultaneously, it reduces the number of parts and the complexity of connections, facilitating operation and maintenance.

[0007] Optionally, the second radial flow channel is an annular flow channel surrounding the inner wall of the socket.

[0008] Optionally, a first annular groove is provided on the outer periphery of the plug plate, and a first sealing ring is provided in the first annular groove. Beneficial effect: By adopting the above technical solution and providing a first sealing ring, this application prevents fluid leakage from the front end of the socket away from the joint after the plug and socket are connected.

[0009] Optionally, a second annular groove is provided on the outer periphery of the plug at a position away from the plug plate, and a second sealing ring is provided in the second annular groove. The second sealing ring is adapted to fit and press against the wall surface of the cavity. Beneficial effect: By adopting the above technical solution, this application prevents fluid leakage from the rear end of the plug away from the joint after the plug and socket are connected by providing a second sealing ring.

[0010] Optionally, a pressure balancing chamber is provided on the side of the plug near the plug plate, and the pressure balancing chamber is in communication with the cavity; and the pressure balancing chamber is connected to the outside through a pressure relief hole provided on the socket. Beneficial effect: By adopting the above technical solution, when a slight leakage occurs in the first sealing ring, the leaking fluid enters the pressure balancing chamber and then overflows through the pressure relief hole, avoiding the fluid pressure from generating a reaction force on the plug to pull it out.

[0011] Optionally, the pressure balancing chamber is an annular cavity.

[0012] Optionally, a first chamfer is provided at the outer end of the plug plate, a second chamfer is provided at the opening of the cavity, a third chamfer is provided on the side of the second radial flow channel facing the cavity and close to the plug cap, and a fourth chamfer is provided on the side of the second radial flow channel facing the cavity and away from the plug cap. Beneficial effects: By adopting the above technical solution, the first, second, and third chamfers ensure smooth guidance of the plug when it is inserted into the socket, reducing insertion resistance; the fourth chamfer ensures smooth guidance during normal plug removal, preventing the first sealing ring from getting stuck.

[0013] Optionally, the outer periphery of the first portion of the plug that seals against the cavity is smaller than the outer periphery of the second portion of the plug that does not seal against the cavity, forming a step between the first and second portions; a fifth chamfer is provided at the recessed corner of the step; the inclination angle of the fifth chamfer is the same as that of the second chamfer. Beneficial effects: By adopting the above technical solution, this application ensures smooth insertion of the plug into the socket by setting the inclination angle of the fifth chamfer to be the same as that of the second chamfer, while preventing excessive coaxiality error between the plug and socket during mating, thus avoiding excessive leakage in the connection structure.

[0014] Optionally, the length of the first portion is greater than the depth of the cavity. Beneficial effect: This application adopts the above technical solution to avoid the formation of a back pressure cavity at the junction of the plug and socket.

[0015] Optionally, the blocking plate and the blocking cap are fitted together. Beneficial effect: This application adopts the above technical solution to ensure that the blocking plate and the blocking cap are aligned and pressed tightly together. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a partial cross-sectional view of the pipeline connection structure provided in an embodiment of the present invention. Figure 2 This is a partial cross-sectional view of the plug provided in an embodiment of the present invention; Figure 3 This is a partial cross-sectional view of the socket provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Plug; 2. Socket; 3. First sealing ring; 4. Second sealing ring; 5. First radial flow channel; 6. Plug plate; 7. First chamfer; 8. Second chamfer; 9. Second radial flow channel; 10. Axial flow channel; 11. Pressure balance chamber; 12. Plug cap; 13. Pressure relief hole; 14. Third chamfer; 15. Fourth chamfer; 16. Fifth chamfer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 3 One specific embodiment of the pipeline connection structure shown includes: a plug 1 and a socket 2. The pipeline connection structure described in this application adopts a plug-in form, which can realize quick plugging and unplugging of the plug 1 and the socket 2 without additional fixing measures, eliminate the reverse pull-out force caused by high-pressure fluid, and avoid separation and detachment during use.

[0021] like Figure 1As shown, the plug 1 is tubular, with a stopper 6 at one end. A first radial flow channel 5 is located on the plug 1 near the stopper 6, connecting the interior and exterior of the plug 1. The socket 2 is tubular, with a stopper 12 at one end. A cavity with one open end is located on the outer side of the stopper 12 within the socket 2. An axial flow channel 10 is located between the stopper 12 and the inner wall of the socket 2. A second radial flow channel 9, communicating with the cavity, is located on the socket 2 and communicates with the axial flow channel 10. The pipe connection structure is adapted to seal and fit the end of the plug 1 with the stopper 6 within the cavity of the socket 2, with the first radial flow channel 5 communicating with the second radial flow channel 9. Fluid flows freely within the plug 1, the first radial flow channel 5, the second radial flow channel 9, the axial flow channel 10, and the socket 2. The other end of the plug 1 is sealed to other remote fluid pipelines via threaded or flanged connections; the other end of the socket 2 is sealed to other remote fluid pipelines via threaded or flanged connections. The first radial flow channel 5 of the plug 1, the second radial flow channel 9 of the socket 2, and the axial flow channel 10 should have appropriately designed flow cross-sectional areas and transition radii to meet fluid pressure loss and structural strength requirements. When fluid enters the plug 1 through the remote fluid pipeline, it flows to the plug plate 6. Due to the sealing effect of the plug plate 6, the fluid changes from axial to radial movement and flows out through the first radial flow channel 5. After flowing out of the plug 1, the fluid then enters the socket 2 through the second radial flow channel 9, where its direction of motion changes from radial to axial, entering the axial flow channel 10, and subsequently entering the remote pipeline connected to the socket 2.

[0022] The pipeline connection structure described in this application, also known as a pressure-balanced anti-detachment pipeline connection structure, is an innovative built-in mechanical solution that fundamentally counteracts or significantly reduces the detachment force generated by high-pressure fluids. This achieves a self-locking anti-detachment function under high-pressure conditions, eliminating the need for external fixing devices. The pipeline connection structure described in this application solves the problem of accidental detachment at the joint caused by the reverse detachment force of high-pressure fluid in existing technologies, achieving a connection without additional fixing measures.

[0023] Specifically, the second radial flow channel 9 is an annular flow channel surrounding the inner wall of the socket 2.

[0024] Furthermore, such as Figure 1 and Figure 2 As shown, a first annular groove is provided on the outer periphery of the blocking plate 6, and a first sealing ring 3 is provided in the first annular groove.

[0025] Furthermore, such as Figure 1 and Figure 2 As shown, a second annular groove is provided on the outer periphery of the plug 1 at a position away from the plug plate 6. A second sealing ring 4 is provided in the second annular groove, and the second sealing ring 4 is adapted to fit and press against the wall surface of the cavity. The second sealing ring 4 and the first sealing ring 3 work together to ensure that the fluid flows between the plug 1 and the socket 2 without leakage. The dimensions of the first and second annular grooves can be adjusted according to the diameters of the plug 1 and the socket 2. When the design pressure of the pipeline connection structure is high and the operating environment is harsh, the depth of the first and second annular grooves can be appropriately reduced to enhance the sealing performance of the first sealing ring 3 and the second sealing ring 4. When the design pressure of the pipeline connection structure is low and the operating environment is good, the depth of the first and second annular grooves can be appropriately increased to reduce the friction between the first and second sealing rings 3 and 4 and the hole wall of the socket 2, thereby improving ease of use. The first sealing ring 3 and the second sealing ring 4 can be made of highly elastic materials such as silicone rubber to ensure sealing while minimizing frictional resistance during disengagement, thus avoiding affecting the normal separation of the plug 1 and the socket 2.

[0026] Furthermore, such as Figure 1 and Figure 3 As shown, a pressure balancing chamber 11 is provided on the side of the plug cap 12 near the plug plate 6; as Figure 3 As shown, the pressure balancing chamber 11 is connected to the cavity; and the pressure balancing chamber 11 is connected to the outside through the pressure relief hole 13 provided on the socket 2. The pressure relief hole 13 can be arranged radially or axially to avoid the flow channel being blocked, causing the fluid pressure in the pressure balancing chamber 11 to be unable to be released normally. When the second sealing ring 4 has a slight leakage, the leaking fluid overflows from the mating gap between the plug 1 and the socket 2, avoiding the fluid pressure from generating a reaction force to pull the plug 1 out; when the first sealing ring 3 has a slight leakage, the leaking fluid enters the pressure balancing chamber 11 and then overflows through the pressure relief hole 13, avoiding the fluid pressure from generating a reaction force to pull the plug 1 out.

[0027] Specifically, the pressure balancing chamber 11 is an annular cavity.

[0028] Furthermore, such as Figure 2 and Figure 3As shown, a first chamfer 7 is provided at the outer end of the plug plate 6, a second chamfer 8 is provided at the opening of the cavity, a third chamfer 14 is provided on the side of the second radial flow channel 9 facing the cavity and close to the plug cap 12, and a fourth chamfer 15 is provided on the side of the second radial flow channel 9 facing the cavity and away from the plug cap 12. The angle and height of the first chamfer 7 are appropriately set to ensure smooth guidance of the plug 1 when it is inserted into the socket 2, reducing insertion resistance. The angle and height of the third chamfer 14 are also appropriately set to ensure smooth guidance of the plug 1 when it is inserted into the socket 2, reducing insertion resistance. The angle and height of the fourth chamfer 15 are appropriately set to ensure smooth guidance during normal disengagement of the plug 1, preventing the first sealing ring 3 from getting stuck.

[0029] Furthermore, such as Figures 1 to 3 As shown, the outer periphery of the first part of the plug 1 that is sealed and fitted with the cavity is smaller than the outer periphery of the second part of the plug 1 that is not sealed and fitted with the cavity, and a step is formed between the first part and the second part; a fifth chamfer 16 is provided at the concave corner of the step; the inclination angle of the fifth chamfer 16 is the same as the inclination angle of the second chamfer 8.

[0030] The first part includes a blocking plate 6. A first annular groove and a second annular groove are both located on the outer periphery of the first part; a first sealing ring 3 and a second sealing ring 4 are both fitted onto the outer periphery of the first part. The diameter and length of the first part of the plug 1, and the diameters of the first sealing ring 3 and the second sealing ring 4, are matched with the diameter and depth of the cavity. When the plug 1 is inserted into or removed from the socket 2, the process is smooth and without any shaking.

[0031] Furthermore, the length of the first portion is greater than the depth of the cavity.

[0032] Furthermore, the blocking plate 6 is fitted with the blocking cap 12.

[0033] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A pipe connection structure, characterized in that, include: The plug (1) is tubular, with a stopper (6) at one end and a first radial flow channel (5) at a position near the stopper (6) on the plug (1). The first radial flow channel (5) connects the interior and exterior of the plug (1). The socket (2) is tubular, with a cap (12) at one end near the socket (2). A cavity with one end open is provided in the part of the socket (2) located outside the cap (12). An axial flow channel (10) is provided between the cap (12) and the inner wall of the socket (2). A second radial flow channel (9) communicating with the cavity is provided at the cavity position on the socket (2). The second radial flow channel (9) is connected to the axial flow channel (10). The pipeline connection structure is suitable for sealing and fitting one end of the plug (1) with a plug plate (6) into the cavity of the socket (2), and the first radial flow channel (5) is connected to the second radial flow channel (9), and the fluid flows freely in the plug (1), the first radial flow channel (5), the second radial flow channel (9), the axial flow channel (10) and the socket (2).

2. The pipeline connection structure according to claim 1, characterized in that, The second radial flow channel (9) is an annular flow channel surrounding the inner wall of the socket (2).

3. The pipeline connection structure according to claim 1, characterized in that, A first annular groove is provided on the outer periphery of the blocking plate (6), and a first sealing ring (3) is provided in the first annular groove.

4. The pipeline connection structure according to claim 3, characterized in that, A second annular groove is provided on the outer periphery of the plug (1) at a position away from the plug plate (6), and a second sealing ring (4) is provided in the second annular groove. The second sealing ring (4) is adapted to fit and press against the wall surface of the cavity.

5. The pipeline connection structure according to any one of claims 1-4, characterized in that, A pressure balancing chamber (11) is provided on the side of the plug cap (12) near the plug plate (6), and the pressure balancing chamber (11) is connected to the cavity; and the pressure balancing chamber (11) is connected to the outside through the pressure relief hole (13) provided on the socket (2).

6. The pipeline connection structure according to claim 5, characterized in that, The pressure balancing chamber (11) is an annular cavity.

7. The pipeline connection structure according to any one of claims 1-4, characterized in that, A first chamfer (7) is provided at the outer end of the plug plate (6), a second chamfer (8) is provided at the opening of the cavity, a third chamfer (14) is provided on the side of the second radial flow channel (9) facing the cavity and close to the plug cap (12), and a fourth chamfer (15) is provided on the side of the second radial flow channel (9) facing the cavity and away from the plug cap (12).

8. The pipeline connection structure according to claim 7, characterized in that, The outer periphery of the first part of the plug (1) that is sealed to the cavity is smaller than the outer periphery of the second part of the plug (1) that is not sealed to the cavity, and a step is formed between the first part and the second part; a fifth chamfer (16) is provided at the concave corner of the step; the inclination angle of the fifth chamfer (16) is the same as the inclination angle of the second chamfer (8).

9. The pipeline connection structure according to claim 8, characterized in that, The length of the first part is greater than the depth of the cavity.

10. The pipe connection structure according to any one of claims 1-4, characterized in that, The blocking plate (6) is attached to the blocking cap (12).

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