Three-way connector and three-way assembly

Abstract

The utility model relates to the field of pipeline connection, in particular to a three-way connector and a three-way assembly. The main channel is a fluid outflow channel, the first branch channel and the second branch channel are both fluid inflow channels, and the side wall, right facing the second branch channel, of the pressure stabilizing cavity is an arc face protruding towards the second branch channel, so that a flow channel between the main channel and the first branch channel is gradually decreased and then gradually increased, at the moment, the fluid flow speed is decreased, and static pressure is increased; the phenomena of fluid flow speed increase and static pressure reduction during confluence can be resisted, so that the pipeline resistance is reduced; or, the main channel is a fluid inflow channel, the first branch channel and the second branch channel are fluid outflow channels, and the side, right facing the second branch channel, of the pressure stabilizing cavity is a concave arc face deviating from the second branch channel, so that a flow channel between the main channel and the first branch channel is gradually increased and then gradually reduced, at the moment, the fluid flow speed is increased, and the static pressure is reduced; therefore, the phenomena of fluid flow speed reduction and static pressure increase during shunting can be resisted, and pipeline resistance is reduced.

Description

Technical Field

[0001] The utility model relates to the field of pipeline connection, in particular to a three-way joint and a three-way assembly. Background Art

[0002] With the rapid development of the hydrogen energy industry, hydrogen refueling stations have become increasingly common. Hydrogen refueling stations are the infrastructure for fueling fuel cell vehicles with high-pressure hydrogen and are a crucial component of the hydrogen energy industry chain. The rapid development of 70MPa fuel cell vehicles has led to an increasing demand for 70MPa hydrogen refueling stations, along with higher requirements for the safety, reliability, versatility, ease of operation, and cost of hydrogen refueling station piping. Tee fittings, a common component in hydrogen refueling station piping, are one of the main contributors to high pipeline resistance and energy consumption.

[0003] The tee pipe fittings in the prior art are mostly cylindrical tee pipe fittings with equal diameters. However, when the cylindrical tee pipe fittings with equal diameters split the fluid in the main pipe and flow into two branch pipes, the fluid velocity in the main pipe decreases and the static pressure increases, resulting in a large pressure change, which in turn causes high resistance in the pipe. When the cylindrical tee pipe fittings with equal diameters merge, the fluid in the two branch pipes merges into the main pipe, increasing the air velocity and reducing the static pressure in the main pipe, which also causes a large pressure change, ultimately causing high resistance in the pipe. Therefore, there is an urgent need to propose a tee joint and tee assembly to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a three-way joint and a three-way assembly to solve the problem of high resistance easily appearing in pipelines in the prior art and achieve the technical effect of reducing resistance and reducing consumption.

[0005] As conceived above, the technical solution adopted by the utility model is:

[0006] The three-way joint is provided with three fluid channels extending from the surface to the interior, the three fluid channels being a main channel, a first branch channel, and a second branch channel. A pressure stabilizing chamber extending along a first direction is provided inside the three-way joint. The main channel and the first branch channel are coaxially arranged and respectively connected to the two ends of the pressure stabilizing chamber. The second branch channel is perpendicular to the main channel and connected to the side wall of the pressure stabilizing chamber.

[0007] The main channel is a fluid outflow channel, the first branch channel and the second branch channel are both fluid inflow channels, and the cavity wall of the pressure-stabilizing chamber facing the second branch channel is a curved surface convex toward the second branch channel; or, the first branch channel and the second branch channel are both fluid outflow channels, the main channel is a fluid inflow channel, and the cavity wall of the pressure-stabilizing chamber facing the second branch channel is a curved surface concave away from the second branch channel.

[0008] Optionally, the radian of the arc surface is 0.2 rad-0.6 rad, and / or the radius of the circle where the arc surface lies is 2 cm-8 cm.

[0009] Optionally, a plurality of conical sealing holes are opened inside the three-way joint, and the three fluid channels are connected to the pressure stabilizing chamber through the conical sealing holes respectively, and the large end of the conical sealing hole faces the fluid channel and the small end faces the pressure stabilizing chamber.

[0010] Optionally, the port diameter of the pressure stabilizing cavity is the same as the small end diameter of the corresponding tapered sealing hole, and the large end diameter of the tapered transition sealing hole is smaller than the diameter of the corresponding fluid channel.

[0011] Optionally, a side connecting port connected to the second branch channel is opened on the side wall of the pressure stabilizing chamber, and the three-way joint further includes a cylindrical transition hole, which is connected between the side connecting port and the corresponding conical sealing hole.

[0012] Optionally, a plurality of stress relief holes are provided on both sides or on either side of the three-way joint along a direction perpendicular to the center lines of the three fluid channels, and the three conical sealing holes are respectively connected to one of the stress relief holes.

[0013] A three-way assembly includes the three-way connector. The three-way assembly also includes a plurality of external pipes. The external pipes correspond to the fluid channels one by one and are partially arranged in the fluid channels.

[0014] Optionally, the tee assembly further includes a plurality of sealing rings, which are arranged in one-to-one correspondence with the external pipes, and the sealing ring sealing sleeves are arranged between the outer wall of the external pipe and the channel wall of the fluid channel.

[0015] Optionally, the tee assembly further includes a plurality of compression sleeves, which are arranged in one-to-one correspondence with the external pipes, and the compression sleeves are arranged between the outer wall of the external pipe and the inner wall of the fluid channel and are detachably connected to the tee joint. The end of the compression sleeve close to the pressure stabilizing chamber abuts against the sealing ring.

[0016] Optionally, the sealing ring is screwed together with the thread of the external pipe, and / or the pressing sleeve is screwed together with the thread of the channel wall of the fluid channel.

[0017] The three-way joint and three-way assembly proposed by the present invention connect the fluids in the main channel, the first branch channel and the second branch channel by setting a pressure-stabilizing chamber. The main channel is the fluid outflow channel, and the first branch channel and the second branch channel are both fluid inflow channels. The side wall of the pressure-stabilizing chamber facing the second branch channel is an arc surface convex toward the second branch channel, so that the flow channel between the main channel and the first branch channel first gradually decreases and then gradually increases. At this time, the fluid flow rate decreases and the static pressure increases, thereby being able to resist the phenomenon of increased fluid flow rate and decreased static pressure during confluence, making the pressure change during confluence smaller, thereby reducing the pipeline resistance. In addition, the upward convex arc surface design intensifies the impact of the converging fluids, so that the vortex and secondary flow generated during confluence are eliminated, suppressed and decomposed by the violent impact of the fluid itself, thereby reducing the pipeline resistance. Alternatively, the main channel is the fluid inflow channel, the first branch channel and the second branch channel are the fluid outflow channels, and the side of the pressure-stabilizing chamber facing the second branch channel is a concave arc surface away from the second branch channel, so that the flow channel between the main channel and the first branch channel first gradually increases and then gradually decreases. At this time, the fluid flow rate increases and the static pressure decreases, thereby being able to resist the phenomenon of fluid flow rate decrease and static pressure increase during diversion, making the pressure change during diversion smaller, thereby reducing pipeline resistance; in addition, the concave arc surface design makes it possible for the fluid to be diverted from the main channel to the first branch channel and the second branch channel. The collision between the fluid and the sharp corners between the first branch channel and the second branch channel in the pressure-stabilizing chamber becomes gentle, reducing the generation of vortices and secondary flows from the source, thereby reducing pipeline resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a three-way connector provided in Example 1 of the present utility model;

[0019] Figure 2 This is a front view of the three-way assembly provided in the first embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of a three-way assembly provided in Example 1 of the present utility model;

[0021] Figure 4 This is a cross-sectional view of a three-way connector provided in Example 1 of the present utility model;

[0022] Figure 5 This is a cross-sectional view of a tee assembly provided in Example 2 of the present utility model;

[0023] Figure 6 This is a cross-sectional view of a three-way connector provided in Example 2 of the present utility model;

[0024] In the picture:

[0025] 1. Tee joint; 11. Main channel; 12. First branch channel; 13. Second branch channel; 14. Pressure stabilizing chamber; 15. Conical sealing hole; 16. Stress relief hole; 17. Cylindrical transition hole;

[0026] 2. External pipeline;

[0027] 3. Sealing ring;

[0028] 4. Press sleeve. DETAILED DESCRIPTION

[0029] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] Example 1

[0034] This embodiment provides a three-way joint and a three-way assembly to solve the problem of high resistance that is prone to occur in pipelines.

[0035] like Figures 1-4 As shown, the three-way assembly includes a three-way connector 1 and an external pipe 2, and the external pipe 2 is connected to the three-way connector 1. Specifically, the three-way connector 1 is provided with three fluid channels extending from the surface to the interior, and the external pipe 2 corresponds to the three fluid channels one by one and is partially arranged in the fluid channels. The three fluid channels are respectively a main channel 11, a first branch channel 12 and a second branch channel 13. The interior of the three-way connector 1 is provided with a pressure-stabilizing chamber 14 extending in a direction parallel to the main channel 11 (hereinafter collectively referred to as the first direction). The main channel 11 and the first branch channel 12 are coaxially arranged and respectively connected to the two ends of the pressure-stabilizing chamber 14. The second branch channel 13 is perpendicular to the main channel 11 and connected to the side wall of the pressure-stabilizing chamber 14. The above arrangement makes the three fluid channels of the three-way connector 1 distributed in a T-shape and all connected to the pressure-stabilizing chamber 14, and the pressure-stabilizing chamber 14 is used as a place for fluid mixing and reversing.

[0036] The main channel 11 is a fluid outflow channel, and the first branch channel 12 and the second branch channel 13 are both fluid inflow channels. This arrangement allows the fluid to flow from the two external pipes 2 through the first branch channel 12 and the second branch channel 13 into the pressure stabilizing chamber 14. After the fluid collides and mixes in the pressure stabilizing chamber 14, it flows toward the main channel 11 and is discharged from the main channel 11 to the other external pipe 2, thereby realizing the confluence of the fluid from two directions into one direction.

[0037] In this embodiment, the side wall of the pressure-stabilizing chamber 14 facing the second branch channel 13 is an arc surface convex toward the second branch channel 13, that is, there is an upward convex arc surface in the flow channel between the first branch channel 12 and the main channel 11. This arc surface makes the flow channel appear to gradually decrease and then gradually increase. When the fluid flows from the first branch channel 12 to the main channel 11, the flow path of the fluid first gradually decreases and then gradually increases. During this process, the flow velocity of the fluid decreases and the static pressure increases, thereby resisting the phenomenon of increased flow velocity and decreased static pressure of the converging fluid when the arc surface is not set, thereby reducing the pressure change of the pipeline during confluence, thereby reducing the resistance of the pipeline and extending the service life of the three-way joint 1. Furthermore, the upward convex arc surface design intensifies the impact of the converging fluid, so that the vortex and secondary flow generated during the confluence are eliminated, suppressed and decomposed by the violent impact of the fluid itself, thereby reducing the pipeline resistance.

[0038] Optionally, the curvature of the arc surface is 0.2rad-0.6rad, preferably 0.3rad-0.5rad. This arc setting ensures that the magnitude of the reduction in fluid flow rate and the increase in static pressure both meet the requirements of reducing pipeline resistance, while also avoiding the arc surface bending too large, resulting in poor pipeline circulation. In addition, the radius of the circle in which the arc surface is located is 2-8cm, preferably 4cm-6cm. This radius setting ensures that the size of the arc surface ensures that the magnitude of the reduction in fluid flow rate and the increase in static pressure both meet the requirements of reducing pipeline resistance, while also avoiding the space occupied by the arc surface being too large, resulting in poor pipeline circulation.

[0039] In other embodiments, only the curvature or radius of the arc surface may be limited, as long as a good resistance reduction effect can be ensured without affecting the smooth flow of the pipeline. No excessive restrictions are imposed here.

[0040] Optionally, a plurality of conical sealing holes 15 are provided inside the tee joint 1, and the three fluid channels are connected to the pressure-stabilizing chamber 14 through the conical sealing holes 15 respectively. The large end of the conical sealing hole 15 faces the fluid channel, which facilitates the matching of the end of the external pipe 2 with the conical sealing hole 15, thereby improving the installation efficiency. The small end of the conical sealing hole 15 faces the pressure-stabilizing chamber 14, which can avoid interference between the multiple conical sealing holes 15 and improve the rationality of the structure.

[0041] Furthermore, the end of the external pipe 2 is a conical structure, which facilitates the matching of the end of the external pipe 2 with the large end of the conical sealing hole 15, thereby improving the tightness of the connection between the external pipe 2 and the tee joint 1 and the rationality of the overall structure.

[0042] Optionally, the large end diameter of the conical sealing hole 15 is smaller than the diameter of the fluid channel to form a positioning step, which is convenient for setting components such as seals to improve the air tightness of the connection between the external pipe 2 and the three-way joint 1.

[0043] For example, the port diameter of the pressure stabilizing cavity 14 is the same as the small end diameter of the corresponding tapered sealing hole 15. This arrangement facilitates the communication between the small end of the tapered sealing hole 15 and the port of the pressure stabilizing cavity 14, improving structural consistency and assembly efficiency.

[0044] Optionally, the three-way joint 1 also includes a cylindrical transition hole 17, which is located between the conical sealing hole 15 and the side wall opening of the pressure-stabilizing chamber 14. The cylindrical transition hole 17 can facilitate the processing of the conical sealing hole 15, avoid interference between the processing equipment and the fluid channel, and improve processing efficiency. In addition, the cylindrical transition hole 17 can enable the second branch channel 13 to avoid the first branch channel 12 and the main channel 11, thereby improving the rationality of the structure.

[0045] Optionally, multiple stress relief holes 16 are provided on either or both sides of the tee joint 1 in a direction perpendicular to the center lines of the three fluid channels, and each of the three tapered sealing holes 15 is connected to a stress relief hole 16. When the fluid reaches the pressure-stabilizing chamber 14, it intersects with the fluid in the other fluid channels, and the fluids in the different fluid channels collide with each other. At this time, stress concentration occurs at the three tapered sealing holes 15. Providing stress relief holes 16 at these locations can buffer some of the stress by shrinking or expanding the stress relief holes 16, thereby extending the service life of the tee joint 1. In addition, the stress relief holes 16 serve as leak detection holes to detect the sealing performance of the end of the external pipe 2 and the wall of the tapered sealing hole 15 after they are attached.

[0046] Optionally, the tee assembly further includes a plurality of sealing rings 3, each corresponding to the external pipe 2. The sealing rings 3 are provided between the outer wall of the external pipe 2 and the wall of the fluid channel. This arrangement can improve the reliability of the fit between the external pipe 2 and the fluid channel, thereby improving the reliability of the tee joint 1.

[0047] Furthermore, one end of the sealing ring 3 close to the pressure stabilizing chamber 14 abuts against the positioning step. This arrangement can prevent the sealing ring 3 from shifting, further improving the reliability of the fit between the external pipe 2 and the fluid channel.

[0048] Optionally, the tee assembly further includes a plurality of compression sleeves 4, each corresponding to the external pipe 2. The compression sleeves 4 are disposed between the outer wall of the external pipe 2 and the inner wall of the fluid channel and are detachably connected to the tee joint 1. The compression sleeves 4 abut against the sealing ring 3 at one end thereof, which is adjacent to the pressure-stabilizing chamber 14. The compression sleeves 4 can further enhance the sealing between the external pipe 2 and the fluid channel and can press the sealing ring 3 against the positioning step, thereby enhancing the squeezing effect on the sealing ring 3 and thus improving the sealing strength.

[0049] Optionally, the sealing ring 3 is threadedly engaged with the external pipe 2, and the compression sleeve 4 is threadedly engaged with the channel wall of the fluid channel. When the compression sleeve 4 rotates, the threaded engagement between the compression sleeve 4 and the channel wall of the fluid channel allows the compression sleeve 4 to move within the fluid channel, thereby gradually pressing the sealing ring 3 against the positioning step. The sealing ring 3 is threadedly engaged with the external pipe 2, and the sealing ring 3 can also gradually press against the compression sleeve 4 as it rotates. By configuring the sealing ring 3 and the compression sleeve 4 to abut against each other, the external pipe 2 is secured within the fluid channel.

[0050] In other embodiments, only the sealing ring 3 may be provided to cooperate with the thread of the external pipe 2, or only the compression sleeve 4 may be provided to cooperate with the thread of the fluid channel. As long as the external pipe 2 can be firmly fixed in the fluid channel, no excessive restrictions will be imposed here.

[0051] The assembly process of the three-way assembly of the utility model is as follows:

[0052] First, put the pressing sleeve 4 on the outer wall of the external pipe 2, then screw the sealing ring 3 to the outer wall of the external pipe 2, insert the external pipe 2 into the fluid channel respectively, and the end of the external pipe 2 cooperates with the tapered sealing hole 15. At this time, screw the pressing sleeve 4 to the channel wall of the fluid channel, and continue to screw the pressing sleeve 4 to move the pressing sleeve 4 until it is tightly against the sealing ring 3 to complete the assembly of the tee assembly.

[0053] Example 2

[0054] This embodiment provides a three-way joint and a three-way assembly, and the basic structure of the three-way joint and the three-way assembly provided in this embodiment is the same as that of the first embodiment, with only some differences in the settings. This embodiment no longer sets the same structure as the first embodiment.

[0055] like Figure 5-Figure 6 As shown, the first branch channel 12 and the second branch channel 13 are both fluid outflow channels, and the main channel 11 is the fluid inflow channel. This arrangement allows the fluid in an external pipe 2 to flow from the main channel 11 into the pressure-stabilizing chamber 14, and then the fluid flows from the pressure-stabilizing chamber 14 into the first branch channel 12 and the second branch channel 13 and is discharged to the other two external pipes 2, thereby realizing the diversion of the fluid from one direction to two directions; the cavity wall of the pressure-stabilizing chamber 14 facing the second branch channel 13 is a curved surface that is concave away from the second branch channel 13.

[0056] That is, in this embodiment, there is a concave arc surface in the flow channel between the first branch channel 12 and the main channel 11. This arc surface makes the flow channel appear to be a shape that first gradually increases and then gradually decreases. When the fluid flows from the main channel 11 to the first branch channel 12, the flow path of the fluid first gradually increases and then gradually decreases. During this process, the flow velocity of the fluid increases and the static pressure decreases, thereby counteracting the phenomenon of reduced flow velocity and increased static pressure of the diverted fluid when the arc surface is not set, thereby reducing the pressure change of the pipeline during diversion, reducing the resistance of the pipeline, and thus extending the service life of the three-way joint 1. Furthermore, the concave arc surface design makes it possible for the fluid to be diverted from the main channel 11 to the first branch channel 12 and the second branch channel 13. The collision between the fluid and the sharp corners between the first branch channel 12 and the second branch channel 13 in the pressure-stabilizing chamber 14 becomes milder, reducing the generation of vortices and secondary flows from the source, thereby reducing pipeline resistance.

[0057] Optionally, the radian of the arc surface is 0.2rad-0.6rad, preferably 0.3rad-0.5rad. This radian setting ensures that the increase in fluid flow rate and the decrease in static pressure both meet the requirements of reducing pipeline resistance, and avoids the excessive bending amplitude of the arc surface, which causes the fluid to reverse sharply and form vortices. In addition, the radius of the circle where the arc surface is located is 2-8cm, preferably 4cm-6cm. This radius setting ensures that the size of the arc surface ensures that the increase in fluid flow rate and the decrease in static pressure both meet the requirements of reducing pipeline resistance, and avoids the pressure stabilizing chamber 14 being too large, which makes the three-way connector 1 inconvenient to carry and install.

[0058] The other structures of the tee joint 1 and the tee assembly can be set with reference to the first embodiment, and will not be described in detail in this embodiment.

[0059] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-way joint, wherein the three fluid channels are formed from the surface to the inside, the three fluid channels are a main channel (11), a first branch channel (12) and a second branch channel (13), and the three fluid channels are respectively A pressure stabilizing chamber (14) extending in a first direction is provided inside the three-way joint, the main channel (11) and the first branch channel (12) are coaxially arranged and are respectively connected to the two ends of the pressure stabilizing chamber (14), and the second branch channel (13) is perpendicular to the main channel (11) and is connected to the side wall of the pressure stabilizing chamber (14); The main channel (11) is a fluid outflow channel, the first branch channel (12) and the second branch channel (13) are both fluid inflow channels, and the cavity wall of the pressure-stabilizing chamber (14) facing the second branch channel (13) is a curved surface convex toward the second branch channel (13); or, the first branch channel (12) and the second branch channel (13) are both fluid outflow channels, the main channel (11) is a fluid inflow channel, and the cavity wall of the pressure-stabilizing chamber (14) facing the second branch channel (13) is a curved surface concave away from the second branch channel (13).

2. The three-way connector according to claim 1, characterized in that: The radian of the arc surface is 0.2 rad-0.6 rad, and / or the radius of the circle where the arc surface is located is 2 cm-8 cm.

3. The three-way connector according to claim 1, characterized in that: A plurality of conical sealing holes (15) are provided inside the three-way joint, and the three fluid channels are respectively connected to the pressure-stabilizing chamber (14) through the conical sealing holes (15), and the large ends of the conical sealing holes (15) face the fluid channels and the small ends face the pressure-stabilizing chamber (14).

4. The three-way connector according to claim 3, characterized in that: The port diameter of the pressure stabilizing cavity (14) is the same as the small end diameter of the corresponding tapered sealing hole (15), and the large end diameter of the tapered sealing hole (15) is smaller than the diameter of the corresponding fluid channel.

5. The three-way connector according to claim 3, characterized in that: The side wall of the pressure stabilizing chamber (14) is provided with a side communication port connected to the second branch channel (13), and the three-way joint further includes a cylindrical transition hole (17), and the cylindrical transition hole (17) is connected between the side communication port and the corresponding conical sealing hole (15).

6. The three-way connector according to claim 3, characterized in that: Along a direction perpendicular to the center lines of the three fluid channels, a plurality of stress relief holes (16) are provided on both sides or on either side of the three-way joint, and the three conical sealing holes (15) are respectively connected to one of the stress relief holes (16).

7. A three-way assembly, characterized in that: The three-way joint comprises the three-way joint as claimed in any one of claims 1 to 6, wherein the three-way assembly further comprises a plurality of external pipes (2), the external pipes (2) correspond one-to-one to the fluid channels and are partially arranged in the fluid channels.

8. The tee assembly according to claim 7, characterized in that: The three-way assembly further comprises a plurality of sealing rings (3), the sealing rings (3) being arranged in one-to-one correspondence with the external pipes (2), and the sealing rings (3) being sealingly sleeved between the outer wall of the external pipe (2) and the channel wall of the fluid channel.

9. The tee assembly according to claim 8, characterized in that: The three-way assembly further comprises a plurality of compression sleeves (4), the compression sleeves (4) being arranged in one-to-one correspondence with the external pipes (2), the compression sleeves (4) being sleeved between the outer wall of the external pipe (2) and the inner wall of the fluid channel and being detachably connected to the three-way joint, and one end of the compression sleeve (4) close to the pressure-stabilizing chamber (14) abuts against the sealing ring (3).

10. The tee assembly according to claim 9, characterized in that: The sealing ring (3) is screwed together with the external pipe (2) by thread, and / or the pressing sleeve (4) is screwed together with the channel wall of the fluid channel by thread.

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