Low-resistance multi-ear butterfly valve for AI data center circulating cooling pipeline

Abstract

This invention discloses a low-resistance multi-ear butterfly valve for circulating cooling pipelines in AI data centers, relating to the field of valve technology for circulating cooling pipelines. The valve includes a valve body, a valve disc, a first sealing assembly, a second sealing assembly, and a connecting pipe. The first and second sealing assemblies are respectively located on the inlet and outlet sides of the valve disc. A first intermediate cavity is formed between the first sealing plate and the valve disc, and a second intermediate cavity is formed between the valve disc and the second sealing plate. The connecting pipe keeps the two intermediate cavities connected. The notches on both sides of the valve disc accommodate the edges of the sealing plates when fully open, ensuring that all three are located on the same flow plane and pushing the two sealing plates to rotate during the initial closing phase. The sealing surface of the second sealing ring is offset and tilted towards one side of the valve disc, so that the angle required for the second sealing plate to rotate to the sealing position is less than that of the first sealing plate. After both seals are present, the valve disc forms the main seal. This invention can reduce the flow resistance in the fully open state and the pressure difference experienced by the valve disc when closed, making it suitable for circulating cooling pipelines in AI data centers.

Description

Technical Field

[0001] This invention relates to the field of circulating cooling pipeline valve technology, and in particular to a low-resistance multi-ear butterfly valve for circulating cooling pipelines in AI data centers. Background Technology

[0002] AI data center servers and supporting equipment generate a large amount of heat during operation. Circulating cooling systems typically use cooling water or other liquid cooling media to transfer heat between the equipment and heat exchange ends. Butterfly valves, due to their compact structure and short opening and closing stroke, are commonly used for branch isolation in circulating cooling pipelines, equipment maintenance isolation, and flow path switching. As the reliability requirements for continuous operation of cooling systems increase, valves, in addition to having reliable sealing performance, also need to control local pressure loss when fully open.

[0003] To improve isolation reliability, some valves have additional sealing plates on both sides of the main valve disc, forming a multi-seal structure. When multiple plate seals are located at different flow positions when fully open, or when their projections in the cross-sectional direction of the flow channel cannot effectively overlap, it will increase the occupancy and disturbance of the flow channel, leading to an increase in local resistance. In addition, when multiple seals need to be rotated separately, the linkage during the initial opening and closing and the subsequent independent sealing also need to be properly coordinated; otherwise, it will easily increase the number of operating steps and affect the closing sequence.

[0004] Under conditions where the pressure difference between the inlet and outlet sides is large, the main valve disc directly bears the pressure difference of the medium, which correspondingly increases the required opening and closing torque and the closing impact. Long-term unilateral pressure may also affect the stress stability of the valve disc. Existing pressure balancing structures, offset sealing structures, or multiple sealing structures are usually used to improve the reliability of pressure difference, sealing contact, or isolation, respectively. There is still room for further improvement in achieving multi-stage sequential sealing, low-resistance arrangement during full opening, action assistance during the initial closing stage, and pressure connection between the two sides before the main valve disc closes within the same valve body. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a low-resistance multi-ear butterfly valve for circulating cooling pipelines in AI data centers, so as to reduce the occupation and disturbance of the flow channel by the multi-seal structure in the fully open state, so that multiple sealing discs can close in a predetermined order, and reduce the pressure difference on both sides of the valve disc before the main seal is formed, thereby taking into account the requirements of low flow resistance, opening and closing operation and multi-stage isolation.

[0006] To achieve the above objectives, this application adopts the following technical solution: a low-resistance multi-ear butterfly valve for circulating cooling pipes in AI data centers, comprising a valve body, a valve disc, a first sealing assembly, a second sealing assembly, and a connecting pipe; the valve body is a cylindrical shape with open ends, and multiple lugs are spaced apart on the outer periphery of both ends of the valve body; the valve disc is rotatably disposed in the middle of the flow channel of the valve body, and the outer periphery of the valve disc can seal against the inner circumferential surface of the valve body; the first sealing assembly is disposed on the water inlet side of the valve disc, comprising a first sealing ring fixed in the valve body and a first sealing plate rotatably disposed in the first sealing ring, the first sealing plate being able to seal against the first sealing ring; the second sealing assembly is disposed on the water outlet side of the valve disc, comprising a second sealing ring fixed in the valve body and a second sealing plate rotatably disposed in the second sealing ring, the second sealing plate being able to seal against the second sealing ring; the space between the first sealing plate and the valve disc forms a first intermediate cavity, and the space between the valve disc and the second sealing plate forms a second intermediate cavity. The two ends of the connecting pipe are respectively connected to the first intermediate cavity and the second intermediate cavity, and remain conductive during the opening and closing of the low-resistance multi-ear butterfly valve; the valve disc has a first notch and a second notch respectively on both sides facing the first sealing plate and the second sealing plate. In the fully open state, the corresponding edges of the first sealing plate and the second sealing plate are respectively accommodated in the first notch and the second notch, and the valve disc, the first sealing plate and the second sealing plate are located in the same flow plane; the groove walls of the first notch and the second notch are respectively used to push the first sealing plate and the second sealing plate to rotate in the initial stage of the valve disc rotating towards the closed position, and to separate from the corresponding sealing plate after the edge of the corresponding sealing plate moves out of the corresponding notch, so that the first sealing plate and the second sealing plate can continue to rotate independently relative to the valve disc to the sealing position; the second sealing surface of the second sealing ring is offset towards the valve disc side along the axial direction of the valve body and is inclined, so that the angle required for the second sealing plate to rotate from the fully open position to the sealing position is less than the angle required for the first sealing plate to rotate from the fully open position to the sealing position.

[0007] Preferably, when the first sealing plate is sealed to the first sealing ring and the second sealing plate is sealed to the second sealing ring, the first intermediate cavity and the second intermediate cavity are separated from the inlet channel and the outlet channel, respectively, and are kept connected through a connecting pipe; the valve disc can rotate to the closed position when both the first sealing plate and the second sealing plate are in the sealed position, and form a main seal with the inner circumferential surface of the valve body through the outer periphery of the valve disc.

[0008] Preferably, the first sealing plate rotates 90 degrees from the fully open position and then seals with the first sealing ring; the second sealing plate rotates 70 degrees from the fully open position and then seals with the second sealing ring; and the valve disc rotates 90 degrees from the fully open position and then seals with the inner circumferential surface of the valve body.

[0009] Preferably, the connecting pipe is a single pipe located on the outer wall of the valve housing. The two connecting ports of the connecting pipe pass through the valve housing and are located inside the first sealing plate and the second sealing plate, respectively. The connecting pipe is not directly connected to the water inlet channel outside the first sealing plate or the water outlet channel outside the second sealing plate.

[0010] Preferably, both the first notch and the second notch are arc-shaped along the outer periphery of the valve disc; in the fully open state, the surfaces of the valve disc, the first sealing plate and the second sealing plate are parallel to the axis of the valve housing, and the projections of the three along the cross-sectional direction of the flow channel overlap each other.

[0011] Preferably, the first sealing plate is rotatably connected to the first sealing ring via a first rotating shaft, and the second sealing plate is rotatably connected to the second sealing ring via a second rotating shaft. The first rotating shaft and the second rotating shaft are respectively arranged radially along the corresponding sealing ring and extend out of the valve body, and the extended ends are respectively connected to operating handles. The valve body is provided with positioning parts corresponding to the two operating handles, and the operating handles and the corresponding positioning parts are provided with pin holes for the pins to pass through.

[0012] Preferably, a magnetic engagement structure is provided between the first sealing ring and the first sealing sheet, and between the second sealing ring and the second sealing sheet; the magnetic engagement structure includes a first magnetic part disposed at a position near the sealing surface of the corresponding sealing ring and a second magnetic part disposed at the outer periphery of the corresponding sealing sheet, the first magnetic part and the second magnetic part attract each other, and apply an auxiliary attraction force toward the corresponding sealing surface to the sealing sheet when the corresponding sealing sheet approaches the sealing position.

[0013] Preferably, both axial sides of the valve disc are recessed into the valve disc with multiple guide grooves. The guide grooves on the two axial sides are arranged in the same radial pattern. Each guide groove extends from the middle region of the valve disc to the outer periphery, and the outer end of the guide groove faces the outer periphery of the valve disc.

[0014] Preferably, the valve disc is rotatably connected to the valve body via a valve stem, and a knob is connected to the exposed end of the valve stem. The knob is used to drive the valve disc to rotate between a fully open position and a closed position via the valve stem.

[0015] Preferably, each of the lugs has a mounting hole for the connecting bolt to pass through. Multiple mounting holes located at the same end of the valve body are distributed circumferentially around the valve body and correspond to the holes on the pipe flange of the circulating cooling pipe.

[0016] The technical effects and advantages of this invention are as follows:

[0017] This invention utilizes a first and a second notch on both sides of the valve disc to accommodate the edges of the corresponding sealing plates in the fully open state. This arrangement positions the valve disc, the first sealing plate, and the second sealing plate on the same flow plane, with their projections overlapping in the cross-sectional direction of the flow channel. This arrangement reduces the redundant occupation of the effective flow cross-section by the three plate-like components and, in conjunction with the radially arranged guide grooves on both sides of the valve disc, disperses and guides the fluid, thus reducing local flow resistance in the fully open state.

[0018] This invention utilizes a connecting pipe that maintains conductivity to connect the first and second intermediate cavities. After the first and second sealing plates complete their sealing, the two intermediate cavities are separated from the inlet and outlet water channels but remain interconnected, allowing the medium pressure on both sides of the valve disc to tend towards equilibrium. The valve disc then forms a main seal, which helps reduce the torque required for its closure and the instantaneous impact it withstands, and improves the uneven stress caused by long-term unilateral pressure.

[0019] This invention offsets and tilts the second sealing surface of the second sealing ring towards the valve disc, so that the angle required for the second sealing plate to rotate from the fully open position to the sealed position is less than the corresponding rotation angle of the first sealing plate. With the corresponding operating handle, the operation can be performed in the following sequence: the second sealing plate closes first, the first sealing plate closes last, and the valve disc closes last. This sequence first cuts off the water outlet side, then the water inlet side, and creates a closed space connecting the two intermediate cavities. Finally, the valve disc forms the main seal, which improves the coordination of multi-stage isolation.

[0020] This invention utilizes two notched groove walls to push the corresponding sealing discs during the initial closing phase of the valve disc, causing the sealing discs to disengage from the fully open position. Subsequently, the groove walls separate from the sealing discs, allowing the operator to continue independently rotating the sealing discs using the corresponding operating handles. A magnetic engagement structure provides auxiliary attraction when the sealing discs approach the sealing position, and a pin locks the sealing position, retaining manual control capability while reducing the operational burden during the sealing process. The circumferentially distributed lugs at both ends of the valve body can form multiple connections with pipe flanges, improving installation stability. Attached Figure Description

[0021] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a front view structural diagram of the present invention;

[0024] Figure 3This is a schematic diagram of the internal structure of the valve housing after partial cross-section.

[0025] Figure 4 This is a schematic diagram of the overall structure from another perspective of the present invention;

[0026] Figure 5 This is an exploded structural diagram of the valve disc, the first sealing assembly, and the second sealing assembly of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure of one side of the valve disc of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the other side of the valve disc of the present invention;

[0029] Figure 8 This is a schematic diagram of the mating structure of the second sealing ring and the second sealing sheet of the present invention;

[0030] Figure 9 This is a schematic diagram of the three-piece sealing structure of the valve body of the present invention in a partially cut-open state.

[0031] Legend: 1. Valve body; 2. Lug; 3. Connecting pipe; 4. Knob; 5. Valve disc; 6. First sealing ring; 7. First sealing plate; 8. Second sealing ring; 9. Second sealing plate; 10. First notch; 11. Guide groove; 12. Second notch. Detailed Implementation

[0032] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0033] Reference Figures 1 to 4 A low-resistance multi-ear butterfly valve for circulating cooling pipelines in AI data centers includes a valve body 1, which is a cylindrical shape open at both ends, with an internal flow channel for the circulating cooling medium. Multiple lugs 2 are spaced apart on the outer periphery of both ends of the valve body 1, each lug 2 having a mounting hole for a connecting bolt to pass through. During installation, the valve body 1 is placed between two flanges of the circulating cooling pipeline, and the connecting bolts pass through the corresponding lugs 2 and the pipeline flanges, thereby securing the valve body 1 circumferentially at multiple points. The number and distribution of the lugs 2 can be determined according to the hole positions of the pipeline flanges.

[0034] Valve disc 5 is located in the middle of the flow channel of valve body 1. Valve disc 5 is rotatably connected to valve body 1 via valve stem, and the exposed end of valve stem is connected to knob 4. When the operator rotates knob 4, knob 4 drives valve disc 5 to rotate between the open and closed positions via valve stem. In this embodiment, valve disc 5 rotates 90 degrees from the fully open position to the closed position, and its outer periphery makes sealing contact with the inner circumferential surface of valve body 1, thereby forming a main seal located in the middle of the flow channel.

[0035] Reference Figure 6 and Figure 7 Multiple guide grooves 11 are recessed into the interior of the valve disc 5 on both axial sides, and the guide grooves 11 on both axial sides are arranged in the same radial pattern. Each guide groove 11 extends from the central region of the valve disc 5 outwards, with its outer end facing the outer periphery of the valve disc 5. When the valve disc 5 is in the initial opening or not fully open state, the circulating cooling medium acting on the side of the valve disc 5 can be dispersed along each guide groove 11 towards the outer periphery of the valve disc 5, thereby reducing the impact caused by the concentrated action of the medium on a local position of the valve disc 5 and making the fluid load distribution on both sides of the valve disc 5 more uniform.

[0036] Reference Figure 3 , Figure 5 and Figure 9 A first sealing ring 6 is fixedly disposed inside the valve body 1 on the water inlet side, and the inner circumference of the first sealing ring 6 forms a first sealing surface. A first sealing plate 7 is disposed inside the first sealing ring 6 and is rotatably connected to the first sealing ring 6 via a rotating shaft. The rotating shaft of the first sealing plate 7 is arranged radially along the first sealing ring 6, allowing the first sealing plate 7 to rotate relative to the first sealing ring 6. After the first sealing plate 7 rotates 90 degrees from the fully open position, its outer circumference comes into circumferential contact with the first sealing surface of the first sealing ring 6, thereby forming a water inlet side seal.

[0037] The second sealing ring 8 is fixedly installed inside the valve body 1 on the water outlet side. The second sealing plate 9 is disposed inside the second sealing ring 8 and is rotatably connected to the second sealing ring 8 via another rotating shaft. The structure and shape of the second sealing ring 8 are different from those of the first sealing ring 6. The second sealing surface of the second sealing ring 8 is positioned forward and inclined towards the valve disc 5. After the second sealing plate 9 is rotated 70 degrees from the fully open position, its outer periphery can make circumferential contact with the second sealing surface, thereby forming a seal on the water outlet side. Since the rotation angle required for the second sealing plate 9 to reach the sealing position is less than the rotation angle required for the first sealing plate 7 to reach the sealing position, the second sealing plate 9 can complete the sealing process before the first sealing plate 7.

[0038] The rotating shafts of the first sealing plate 7 and the second sealing plate 9 extend out of the valve body 1, and operating handles are connected to the extended ends. The exterior of the valve body 1 has positioning parts corresponding to the two operating handles, and pin holes are provided on both the operating handles and the corresponding positioning parts. When the first sealing plate 7 or the second sealing plate 9 rotates to the closed position, the pin is passed through the corresponding pin holes to restrict the corresponding rotating shaft from continuing to rotate, thus keeping the first sealing plate 7 or the second sealing plate 9 in the sealing position. To open the corresponding sealing plate, the pin is first removed, and then the corresponding rotating shaft is driven to rotate in the opposite direction using the operating handle.

[0039] Magnetic engagement structures are provided between the first sealing ring 6 and the first sealing sheet 7, and between the second sealing ring 8 and the second sealing sheet 9. The magnetic engagement structure can consist of a magnet positioned near the sealing surface of the sealing ring and a magnetically attracting part positioned on the outer periphery of the corresponding sealing sheet, or it can consist of two sets of attracting magnetic components positioned at corresponding positions on the sealing ring and sealing sheet. The magnetic components can be encapsulated within the corresponding ring or sheet body to reduce the influence of the circulating cooling medium on the magnetic components. When the sealing sheet is manually rotated to a position near the sealing surface, the magnetic engagement structure generates an auxiliary attractive force on the sealing sheet towards the corresponding sealing surface, making it easier for the sealing sheet to adhere to the sealing surface. The final closing action of the sealing sheet is still completed by the operator using the operating handle, and the retaining force after sealing is provided by the latch.

[0040] A first intermediate cavity is formed between the first sealing plate 7 and the valve disc 5, and a second intermediate cavity is formed between the valve disc 5 and the second sealing plate 9. A connecting pipe 3 is provided on the outer wall of the valve body 1. One end of the connecting pipe 3 passes through the valve body 1 and communicates with the first intermediate cavity, and the other end of the connecting pipe 3 passes through the valve body 1 and communicates with the second intermediate cavity. The two connecting ports of the connecting pipe 3 are located inside the first sealing plate 7 and the second sealing plate 9, respectively. The connecting pipe 3 is not directly connected to the water inlet channel outside the first sealing plate 7 or the water outlet channel outside the second sealing plate 9. The connecting pipe 3 remains open during the use of the butterfly valve, allowing for continuous exchange and circulation of the cooling medium between the first and second intermediate cavities.

[0041] Reference Figure 6 , Figure 7 and Figure 9A first notch 10 is formed on the side of the valve disc 5 facing the first sealing plate 7, and a second notch 12 is formed on the side of the valve disc 5 facing the second sealing plate 9. Both the first notch 10 and the second notch 12 are arc-shaped along the outer periphery of the valve disc 5. The first notch 10 is used to accommodate the corresponding edge of the first sealing plate 7, and the second notch 12 is used to accommodate the corresponding edge of the second sealing plate 9. When the valve disc 5, the first sealing plate 7, and the second sealing plate 9 are all in the fully open position, the plate surfaces of the three plate-shaped components are parallel to the axis of the valve body 1 and are located in the same flow plane; the corresponding edges of the first sealing plate 7 and the second sealing plate 9 respectively enter the first notch 10 and the second notch 12, so that the projections of the three plate-shaped components along the cross-sectional direction of the flow channel overlap each other, thereby reducing the effective flow area occupied by the three plate-shaped components.

[0042] The first notch 10 and the second notch 12 also serve to transmit the driving force during the initial closing phase. When the valve disc 5 rotates from the fully open position to the closed position, the groove wall of the first notch 10 contacts the edge of the first sealing plate 7, and the groove wall of the second notch 12 contacts the edge of the second sealing plate 9. The valve disc 5 thus pushes the first sealing plate 7 and the second sealing plate 9 to rotate a certain distance respectively. As the edges of each sealing plate move out of their corresponding notches, each sealing plate disengages from the valve disc 5, and the valve disc 5 no longer pushes the sealing plates. At this point, the operator can complete the remaining closing stroke of the first sealing plate 7 and the second sealing plate 9 using the two operating handles respectively.

[0043] When switching the butterfly valve from the fully open to the closed state, the operator first turns knob 4, causing valve disc 5 to rotate in the closing direction. This, along with the first notch 10 and the second notch 12, pushes the first sealing plate 7 and the second sealing plate 9 to complete the initial rotation. After the two sealing plates separate from valve disc 5, the operator continues to rotate the second sealing plate 9 using the operating handle on the outlet side. When the second sealing plate 9 rotates to the second sealing surface adjacent to the second sealing ring 8, the magnetic engagement structure generates an auxiliary attraction. The operator continues to apply force, causing the second sealing plate 9 to rotate seventy degrees and make sealing contact with the second sealing ring 8. Then, the corresponding pin is inserted to lock the second sealing plate 9 in the closed position.

[0044] After the second sealing plate 9 is closed, the operator continues to rotate the first sealing plate 7 using the operating handle on the water inlet side. When the first sealing plate 7 approaches the first sealing surface of the first sealing ring 6, the corresponding magnetic mating structure applies an auxiliary attractive force to the first sealing plate 7. The operator continues to apply force, causing the first sealing plate 7 to rotate ninety degrees and make sealing contact with the first sealing ring 6. Then, the corresponding pin is inserted to lock the first sealing plate 7 in the closed position. Thus, the second sealing plate 9 first completes the water outlet side sealing, and the first sealing plate 7 then completes the water inlet side sealing.

[0045] When the second sealing plate 9 is closed but the first sealing plate 7 is not yet closed, the circulating cooling medium on the inlet side can enter the first intermediate cavity through the first sealing ring 6 and then enter the second intermediate cavity through the connecting pipe 3, so that both the inlet and outlet surfaces of the valve disc 5 are subjected to the pressure of the circulating cooling medium. After the first sealing plate 7 is closed, the first and second intermediate cavities are separated from the inlet and outlet channels, but the two intermediate cavities are still connected by the connecting pipe 3, so the pressure on both sides of the valve disc 5 can continue to tend to be consistent.

[0046] After the first sealing plate 7 is closed and locked, the operator continues to rotate the knob 4 to bring the valve disc 5 to the closed position, making the outer periphery of the valve disc 5 seal against the inner circumferential surface of the valve body 1. At this time, the outlet-side seal formed by the second sealing plate 9 and the second sealing ring 8 is formed first, followed by the inlet-side seal formed by the first sealing plate 7 and the first sealing ring 6, and the main seal formed by the valve disc 5 and the valve body 1 is formed last. The connecting pipe 3 allows the valve disc 5, which is between the two auxiliary seals, to close under a small pressure difference, and keeps the closed valve disc 5 in an environment where the pressure on both sides is close, thereby reducing the deformation of the valve disc 5 caused by the long-term action of the medium pressure on one side.

[0047] When the butterfly valve switches from the closed state to the open state, the first sealing plate 7 and the second sealing plate 9 first maintain the pin lock. The operator turns the knob 4 to make the valve disc 5 disengage from the inner circumferential surface of the valve body 1 and rotate it to the fully open position. Since the first intermediate cavity and the second intermediate cavity are connected through the connecting pipe 3 before the valve disc 5 opens, the pressure difference on both sides of the valve disc 5 is small, which can reduce the initial opening torque of the valve disc 5 and reduce the unidirectional impact on the valve disc 5 at the moment of opening.

[0048] After valve disc 5 is opened, the operator removes the pin corresponding to the second sealing plate 9 and, by using the operating handle on the outlet side, overcomes the attraction of the magnetic coupling structure, causing the second sealing plate 9 to rotate 70 degrees in the opposite direction and reach the fully open position. Subsequently, the operator removes the pin corresponding to the first sealing plate 7 and, by using the operating handle on the inlet side, causes the first sealing plate 7 to rotate 90 degrees in the opposite direction and reach the fully open position. The outlet side first forms a clear space, and the inlet side opens subsequently. The circulating cooling medium, after entering the valve body 1, can be discharged towards the outlet side, which helps reduce the instantaneous pressure surge generated when the inlet side opens.

[0049] When both the first sealing plate 7 and the second sealing plate 9 reach the fully open position, their corresponding edges enter the first notch 10 and the second notch 12, respectively. The valve disc 5, the first sealing plate 7, and the second sealing plate 9 are all held together in the same flow plane parallel to the direction of medium flow. The projections of the three plate-shaped components in the cross-sectional direction of the flow channel are concentrated in a narrower area, avoiding multiple plate-shaped components occupying the flow area at different circumferential positions, thereby reducing the impact of the multiple sealing structure on the fully open flow rate. When the circulating cooling medium passes through both sides of the valve disc 5, each guide groove 11 can also disperse and guide the local medium, reducing local flow disturbances near the valve disc 5.

[0050] The butterfly valve in this embodiment can be installed in the main or branch cooling pipes of an AI data center, where the circulating cooling medium can be cooling water or other liquid cooling media. Multiple lugs 2 are used to improve the stability of the connection between the valve body 1 and the pipe flange; the first sealing assembly, main seal, and second sealing assembly form multi-stage isolation in the closed state; the connecting pipe 3 maintains pressure balance on both sides of the valve disc 5; the first notch 10 and the second notch 12 are designed to accommodate low-resistance arrangements during initial push and full opening. These structures collectively adapt to the conditions of continuous operation, high flow rate, and the need for reliable isolation in circulating cooling pipelines.

[0051] In this embodiment, 90 degrees and 70 degrees are specific rotation angles corresponding to the structure shown in the figure. While ensuring that the second sealing plate 9 completes sealing before the first sealing plate 7, and the first sealing plate 7 completes sealing before the valve disc 5, the specific rotation angle of each sealing plate can be adjusted according to the inclination of the second sealing surface, the installation position of each component, and the valve specifications. The number, location, and magnetic force of the magnetic mating structure can also be selected based on the size of the sealing plate and the operating resistance.

[0052] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A low-resistance multi-ear butterfly valve for circulating cooling pipelines in AI data centers, characterized in that, The device includes a valve housing, a valve disc, a first sealing assembly, a second sealing assembly, and a connecting pipe. The valve housing is a cylindrical shape with open ends, and multiple lugs are spaced apart on the outer periphery of each end. The valve disc is rotatably disposed in the middle of the flow channel of the valve housing, and its outer periphery can seal against the inner circumferential surface of the valve housing. The first sealing assembly is disposed on the inlet side of the valve disc and includes a first sealing ring fixed inside the valve housing and a first sealing plate rotatably disposed inside the first sealing ring, the first sealing plate being able to seal against the first sealing ring. The second sealing assembly is disposed on the outlet side of the valve disc and includes a second sealing ring fixed inside the valve housing and a second sealing plate rotatably disposed inside the second sealing ring, the second sealing plate being able to seal against the second sealing ring. The space between the first sealing plate and the valve disc forms a first intermediate cavity, and the space between the valve disc and the second sealing plate forms a second intermediate cavity. The two ends of the connecting pipe are respectively connected to the first intermediate cavity and the second intermediate cavity. The cavity is connected and remains conductive during the opening and closing of the low-resistance multi-ear butterfly valve; the valve disc has a first notch and a second notch respectively on both sides facing the first and second sealing plates. In the fully open state, the corresponding edges of the first and second sealing plates are respectively accommodated in the first and second notches, and the valve disc, the first sealing plate and the second sealing plate are located in the same flow plane; the groove walls of the first and second notches are respectively used to push the first and second sealing plates to rotate in the initial stage of the valve disc rotating towards the closed position, and to separate from the corresponding sealing plates after the edge of the corresponding sealing plate moves out of the corresponding notch, so that the first and second sealing plates can continue to rotate independently relative to the valve disc to the sealing position; the second sealing surface of the second sealing ring is offset towards the valve disc side along the axial direction of the valve body and is inclined, so that the angle required for the second sealing plate to rotate from the fully open position to the sealing position is less than the angle required for the first sealing plate to rotate from the fully open position to the sealing position.

2. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 1, characterized in that, When the first sealing plate is sealed and engaged with the first sealing ring and the second sealing plate is sealed and engaged with the second sealing ring, the first intermediate cavity and the second intermediate cavity are respectively separated from the inlet channel and the outlet channel, and are kept connected through the connecting pipe; the valve disc can rotate to the closed position when both the first sealing plate and the second sealing plate are in the sealed position, and form a main seal with the inner circumferential surface of the valve body through the outer periphery of the valve disc.

3. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 2, characterized in that, The first sealing plate rotates 90 degrees from the fully open position and then seals with the first sealing ring; the second sealing plate rotates 70 degrees from the fully open position and then seals with the second sealing ring; and the valve disc rotates 90 degrees from the fully open position and then seals with the inner circumferential surface of the valve body.

4. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 1, characterized in that, The connecting pipe is configured as a single pipe and located on the outer wall of the valve housing. The two connecting ports of the connecting pipe pass through the valve housing and are located on the inner sides of the first sealing plate and the second sealing plate, respectively. The connecting pipe is not directly connected to the water inlet channel outside the first sealing plate or the water outlet channel outside the second sealing plate.

5. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 1, characterized in that, Both the first notch and the second notch are arc-shaped along the outer periphery of the valve disc; in the fully open state, the surfaces of the valve disc, the first sealing plate and the second sealing plate are parallel to the axis of the valve body, and the projections of the three along the cross-sectional direction of the flow channel overlap each other.

6. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 1, characterized in that, The first sealing plate is rotatably connected to the first sealing ring via a first rotating shaft, and the second sealing plate is rotatably connected to the second sealing ring via a second rotating shaft. The first rotating shaft and the second rotating shaft are respectively arranged radially along the corresponding sealing ring and extend out of the valve body, and the extended ends are respectively connected to operating handles. The valve body is provided with positioning parts corresponding to the two operating handles, and the operating handles and the corresponding positioning parts are provided with pin holes for the pins to pass through.

7. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 6, characterized in that, A magnetic engagement structure is provided between the first sealing ring and the first sealing sheet, and between the second sealing ring and the second sealing sheet. The magnetic engagement structure includes a first magnetic part disposed near the sealing surface of the corresponding sealing ring and a second magnetic part disposed on the outer periphery of the corresponding sealing sheet. The first magnetic part and the second magnetic part attract each other and apply an auxiliary attraction force toward the corresponding sealing surface to the sealing sheet when the corresponding sealing sheet approaches the sealing position.

8. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 1, characterized in that, Multiple guide grooves are recessed into the valve disc on both axial sides. The guide grooves on both axial sides are arranged in the same radial pattern. Each guide groove extends from the middle region of the valve disc to the outer periphery, and the outer end of the guide groove faces the outer periphery of the valve disc.

9. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 1, characterized in that, The valve disc is rotatably connected to the valve body via a valve stem. A knob is connected to the exposed end of the valve stem. The knob is used to drive the valve disc to rotate between the fully open and closed positions via the valve stem.

10. The low-resistance multi-ear butterfly valve for AI data center circulating cooling pipelines according to claim 1, characterized in that, Each of the lugs has a mounting hole for the connecting bolt to pass through. Multiple mounting holes located at the same end of the valve body are distributed circumferentially around the valve body and correspond to the holes on the pipe flange of the circulating cooling pipe.

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