Interlocking type ball valve assembly

Abstract

The invention provides an interlocking type ball valve assembly. The interlocking type ball valve assembly comprises two ball valve units. Each ball valve unit comprises a valve body, a valve core, a valve rod and a handle; the inner ends of the two valve bodies are inserted in a matched mode and sealed in the circumferential direction. The two oppositely-arranged outer walls of each valve body are provided with inserting blocks and two limiting blocks distributed at intervals respectively, a limiting groove is formed between the two limiting blocks, and the inserting block on each valve body is inserted into the limiting groove in the other valve body. Each ball valve unit further comprises a sliding piece, the sliding piece is horizontally connected with the valve body located on one side of the limiting block in a sliding mode, and an inverted buckling part is arranged at the outer end of the sliding piece; after the inner ends of the two valve bodies are in butt joint and the sliding piece is slid, the reverse buckling part is used for wrapping the two limiting blocks on the corresponding side and the outer side of the inserting block and locking the inserting block in the limiting groove. After the two internal ball valve units are connected in a butt joint mode, interlocking of the two ball valve units can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball valve assemblies, in particular to an interlocking ball valve assembly. BACKGROUND

[0002] With the increasing requirements of safety and reliability of process flow in oil and gas transportation, chemical production and other industries, the demand for anti-misoperation and long-period stable operation of high-pressure pipeline system is increasingly prominent, which leads to more stringent requirements for the safety, sealing reliability and maintenance convenience of key valves. Currently, when two ball valves are used to connect two pipelines, the lack of interlocking structure between the two ball valves makes it easy to misdisconnect the two ball valves due to misoperation, which may cause leakage of fluid in the pipeline and has a great safety hazard. SUMMARY

[0003] The technical problem to be solved by the present application is to provide an interlocking ball valve assembly, which can interlock the two ball valve units after butt joint connection, thereby avoiding misdisconnection of the two ball valve units and effectively eliminating the risk of fluid leakage in the pipeline.

[0004] The present application provides an interlocking ball valve assembly, comprising two ball valve units; each ball valve unit comprises a valve body, a valve core, a valve stem and a handle, the valve core is rotationally connected inside the valve body, the valve stem is rotationally connected to the valve body, the inner end of the valve stem is in transmission connection with the valve core, and the outer end of the valve stem is fixed with the handle; the inner ends of the two valve bodies are inserted and connected in cooperation and circumferentially sealed; two of the valve bodies are provided with an insertion block and two spaced limiting blocks on the opposite outer walls respectively, a limiting groove is formed between the two limiting blocks, and the insertion block on each valve body is inserted into the limiting groove on the other valve body; each ball valve unit further comprises a sliding member, the sliding member is horizontally slidingly connected with the valve body on one side of the limiting block, and a reverse buckling portion is arranged on the outer end of the sliding member; when the inner ends of the two valve bodies are butt jointed and the sliding member is slid, the reverse buckling portion is used to wrap outside the two limiting blocks and the insertion block on the corresponding side and lock the insertion block in the limiting groove.

[0005] By adopting the above structure, after the butt joint connection of the two ball valve units and the sliding of the sliding member, the reverse buckling portion can wrap outside the two limiting blocks and the insertion block on the corresponding side and lock the insertion block in the limiting groove, thereby achieving interlocking of the two ball valve units, i.e. avoiding misdisconnection of the two ball valve units, and effectively eliminating the risk of fluid leakage in the pipeline, i.e. eliminating the safety hazard.

[0006] In one possible implementation, an annular protrusion is provided on the inner end of one valve body, and a sealing ring is embedded in the end of the protrusion away from the valve body. A slot adapted to the protrusion is provided on the inner end of the other valve body, and an annular rib is provided on the inner end of the slot. The protrusion is inserted into the slot to make the inner cavities of the two valve bodies communicate, and the annular rib is used to fit tightly against the sealing ring and provide circumferential sealing.

[0007] In one possible implementation, an annular groove is coaxially provided at the end of the protrusion away from the valve body. The cross-sectional shape of the annular groove is dovetail-shaped. The sealing ring is embedded in the annular groove. The outer end of the annular rib forms an arc-shaped surface. The outer end of the annular rib abuts against the sealing ring to circumferentially seal the two valve bodies.

[0008] In one possible implementation, a groove is provided on the valve body located on one side of the two limit blocks, and each sliding element is horizontally slidably connected to the groove on the corresponding valve body.

[0009] In one possible implementation, each ball valve unit further includes a linkage shaft and a spring; the inner side of the valve body is provided with a slide cavity communicating with a slide groove, the linkage shaft is disposed in the slide cavity and can slide along the axial direction of the ball valve unit, the inner end of the sliding member is provided with a slide hole, the linkage shaft is movably inserted in the slide hole and can make the sliding member slide horizontally relative to the linkage shaft, the spring is sleeved on the outside of the linkage shaft, and the two ends of the spring abut against a first annular step located on the inner wall of the slide cavity and a second annular step located on the outer wall of the linkage shaft, respectively, the spring is used to apply elastic force to the linkage shaft to make The outer end of the linkage shaft extends out of the inner end of the valve body; a stop is provided in the middle of the inner bottom of the sliding hole, and a notch is provided at the bottom of the linkage shaft for horizontal avoidance of the stop. The inner wall surface of the notch on the side away from the inner end of the valve body forms an arc surface. When the spring pushes the linkage shaft so that the outer end of the linkage shaft extends out of the inner end of the valve body, the side wall of the linkage shaft is used to abut against the stop to restrict the horizontal sliding of the sliding member relative to the linkage shaft. When the outer end of the linkage shaft is pushed by the inner end of another valve body and retracts into the valve body on the same side, the arc surface and part of the notch are horizontally aligned with the stop.

[0010] In one possible implementation, the inner end of the linkage shaft extends to the position of the valve stem, and a groove is provided on the inner end of the linkage shaft. An arc-shaped boss is provided on the valve stem, and the boss is coaxially arranged with the valve stem. When the inner ends of the two valve bodies are connected, and the ball valve unit is opened by rotating the handle, the boss is used to slide horizontally into the groove and restrict the sliding of the linkage shaft relative to the valve body.

[0011] In one possible implementation, each ball valve unit also includes a valve seat; the inner end of the valve seat is threaded into the outer end of the valve body and is used to press the valve core and the sealing seats located on both sides of the valve core into the valve body, and the outer end of the valve seat forms a pipeline connection interface.

[0012] In a possible implementation, the outer circumferential wall of the valve seat outside the valve body is provided with an outer convex part in the shape of a regular hexagon. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 First perspective view of two ball valve units closed and separated from each other; Figure 2 Second perspective view of two ball valve units closed and separated from each other; Figure 3 Perspective view of two ball valve units connected to each other and opened; Figure 4 Sectional view of two ball valve units connected to each other and opened; Figure 5 is Figure 4 Enlarged view of part A in FIG. 8; Figure 6 First perspective view of a ball valve unit with part of the structure removed; Figure 7 Second perspective view of a ball valve unit with part of the structure removed. DETAILED DESCRIPTION

[0014] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed to adapt to specific application occasions.

[0015] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0016] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature can be directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0017] The application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Referring to Figures 1-7 As shown in the drawings, the embodiments of the application disclose an interlocking ball valve assembly, which comprises two ball valve units; each ball valve unit comprises a valve body 1, a valve core 2, a valve rod 3 and a handle 4, the valve core 2 is rotationally connected in the interior of the valve body 1, the valve rod 3 is rotationally connected on the valve body 1, the inner end of the valve rod 3 is in transmission connection with the valve core 2, and the outer end of the valve rod 3 is fixed with the handle 4; the inner ends of the two valve bodies 1 are matched and inserted and circumferentially sealed; two of the valve body 1 are respectively provided with an insertion block 11 and two limit blocks 12 which are spaced apart on the oppositely arranged outer walls, a limit groove 13 is formed between the two limit blocks 12, and the insertion block 11 on each valve body 1 is inserted into the limit groove 13 on the other valve body 1; each ball valve unit further comprises a sliding piece 5, the sliding piece 5 is horizontally slidingly connected with the valve body 1 on one side of the limit block 12, and the outer end of the sliding piece 5 is provided with an undercut 51; when the inner ends of the two valve bodies 1 are butted, and after the sliding piece 5 is slid, the undercut 51 is used for wrapping the outer sides of the two limit blocks 12 and the insertion block 11 on the corresponding side and locking the insertion block 11 in the limit groove 13.

[0019] The inner end of one of the valve bodies 1 is provided with a ring-shaped protruding part 14, the end of the protruding part 14 away from the valve body 1 is inlaid with a sealing ring 6, the inner end of the other valve body 1 is provided with an insertion slot 15 matched with the protruding part 14, and the inner end of the insertion slot 15 is provided with a ring-shaped protruding rib 151; the protruding part 14 is inserted into the insertion slot 15 to make the inner cavities of the two valve bodies 1 communicate, and the ring-shaped protruding rib 151 is used for closely contacting and circumferentially sealing with the sealing ring 6; after the structure is adopted, when the two ball valve units are butted, the protruding part on one of the valve bodies can be matched and inserted with the insertion slot on the other valve body, at this time, the ring-shaped protruding rib on the inner end of the insertion slot can closely contact and circumferentially seal with the sealing ring inlaid in the protruding part, so that reliable butt joint of the valve bodies in the two ball valve units can be realized and the purpose of circumferential sealing can be achieved.

[0020] The protrusion 14 is coaxially provided with an annular embedding groove 141 at one end away from the valve body 1, the cross section of the annular embedding groove 141 is formed in dovetail shape, the sealing ring 6 is embedded in the annular embedding groove 141, the outer end of the annular protruding rib 151 is formed in annular arc surface, and the outer end of the annular protruding rib 151 is tightly abutted on the sealing ring 6 to make the two valve bodies 1 circumferentially sealed; after the structure is adopted, the cross section of the annular embedding groove is formed in dovetail shape, so that the anti-falling-off effect of the sealing ring and the annular embedding groove can be improved, the rubber body of the sealing ring and the metal body of the valve body are chemically bonded together through high-temperature and high-pressure vulcanization process to form an integrated rubber-metal composite sealing part, so as to maintain the effectiveness of the sealing and prevent leakage; in addition, the outer end of the annular protruding rib is formed in annular arc surface, so that the sealing ring can be better deformed when the annular protruding rib extrudes the sealing ring, so as to improve the close sealing effect of the annular protruding rib and the sealing ring, and the annular protruding rib can avoid cutting the sealing ring to avoid damage to the sealing ring.

[0021] The valve body 1 on one side of the two limiting blocks 12 is provided with a sliding groove 16, and each sliding piece 5 is horizontally slidably connected in the sliding groove 16 on the corresponding valve body 1; after the structure is adopted, the sliding piece can be reliably and horizontally slidably connected with the valve body under the cooperation and sliding of the sliding piece and the sliding groove.

[0022] Each ball valve unit further comprises a linkage shaft 7 and a spring 8; the inner side of the valve body 1 is provided with a sliding cavity 17 communicating with the sliding groove 16, the linkage shaft 7 is arranged in the sliding cavity 17 and can slide in the axial direction of the ball valve unit, the inner end of the sliding member 5 is provided with a sliding hole 52, the linkage shaft 7 is movably arranged in the sliding hole 52 and can make the sliding member 5 slide horizontally relative to the linkage shaft 7, the spring 8 is sleeved on the outer side of the linkage shaft 7, the two ends of the spring 8 abut against a first annular step 171 on the inner wall of the sliding cavity 17 and a second annular step 71 on the outer wall of the linkage shaft 7 respectively, and the spring 8 is used to apply a spring force to the linkage shaft 7 to make the outer end of the linkage shaft 7 protrude out of the inner end of the valve body 1; the middle of the inner bottom of the sliding hole 52 is provided with a stop block 53, the bottom of the linkage shaft 7 is provided with a gap 72 for horizontally avoiding the stop block 53, and the inner wall surface of the gap 72 away from the inner end of the valve body 1 forms a circular arc surface 721; when the spring 8 pushes the linkage shaft 7 to make the outer end of the linkage shaft 7 protrude out of the inner end of the valve body 1, the side wall of the linkage shaft 7 is used to abut against the stop block 53 to limit the horizontal sliding of the sliding member 5 relative to the linkage shaft 7, and when the outer end of the linkage shaft 7 is pushed by the inner end of the other valve body 1 and shrinks into the valve body 1 on the side, the circular arc surface 721 and part of the gap 72 are horizontally aligned with the stop block 53; after adopting this structure, when the valve bodies in the two ball valve units are not butt-jointed, the outer end of the linkage shaft protrudes out of the inner end of the valve body under the action of the spring force, and at the same time, the side wall of the linkage shaft is in abutment with the stop block, that is, in this state, the sliding member and the undercut on the outer end of the sliding member cannot be horizontally slid; after the valve bodies in the two ball valve units are butt-jointed, the outer end of the linkage shaft will be pushed by the inner end of the other valve body and shrink into the valve body on the side, at this time, part of the circular arc surface and the gap on the linkage shaft can be horizontally aligned with the stop block, and in this state, the sliding member can move horizontally relative to the valve body, that is, when the sliding member slides horizontally relative to the linkage shaft, the stop block can cooperate with the circular arc surface to guide, and then the stop block can pass through the gap and slide to the other side of the linkage shaft, that is, the sliding member and the undercut are allowed to move horizontally (in the process of cooperation of the stop block with the circular arc surface and passing through the gap, the linkage shaft can first compress the spring and move away from the inner end of the valve body, and then, after the stop block passes through the gap, the linkage shaft can move to the side close to the inner end of the valve body under the action of the spring to reset).

[0023] The inner end of the linkage shaft 7 extends to the position where the valve stem 3 is located, and a notch 73 is arranged on the inner end of the linkage shaft 7, and a circular-arc-shaped boss 31 is arranged on the valve stem 3, and the boss 31 is coaxially arranged with the valve stem 3; when the inner ends of the two valve bodies 1 are butted, and the rotating handle 4 is rotated to make the ball valve unit be opened, the boss 31 is used for horizontally sliding into the notch 73 and limiting the linkage shaft 7 from sliding relative to the valve body 1; after the valve bodies in the two ball valve assemblies are butted and the sliding member slides relative to the valve body to make the reverse buckling part lock the plug in the limiting groove, and at the same time the rotating handle is rotated to make the ball valve unit be opened (the handle can drive the valve stem and the valve core to rotate), the boss can horizontally slide into the notch, at this time, the linkage shaft cannot horizontally move any more, that is, the sliding member cannot be horizontally slid (the blocking block on the sliding member cannot pass through the gap and horizontally move relative to the linkage shaft and the valve body), so that the reverse buckling part can keep locking the plug in the limiting groove, that is, when the two ball valve units are butted and in the opened state, the two ball valve units cannot be separated from each other, so as to realize the interlocking purpose, that is, the ball valve unit can be prevented from being mistakenly separated, the fluid in the pipeline system is prevented from leaking, and the safety of the pipeline system is improved; when the ball valve unit is closed again, the boss can be withdrawn from the notch, at this time, the sliding member can return to the state of being horizontally slidable relative to the valve body and the linkage shaft, when the sliding member is slid and makes the reverse buckling part release the wrapping state of the limiting block and the plug, the two ball valve units can be separated from each other, that is, the two ball valve units can be separated from each other only when they are in the closed state; in addition, after the two ball valve units are separated from each other, the linkage shaft can move to the side close to the inner end of the valve body under the elastic force of the spring and return, at this time, the inner end of the linkage shaft can abut against one end of the boss, so that the handle cannot drive the valve stem to rotate, that is, the ball valve unit cannot be opened when the two ball valve units are separated from each other, that is, the ball valve unit is prevented from being mistakenly opened, so as to prevent the fluid in the pipeline system from leaking and improve the safety of the pipeline system.

[0024] Each ball valve unit further comprises a valve seat 9, an inner end of the valve seat 9 is threadedly connected in an outer end of the valve body 1 and is used to press the valve core 2 and the sealing seats 18 located on both sides of the valve core 2 in the valve body 1, and an outer end of the valve seat 9 forms a pipeline connection interface 91; after the structure is used, since the inner end of the valve seat is threadedly connected in the outer end of the valve body, the user can replace the valve seat with different types of pipeline connection interfaces according to actual use requirements, so that the adaptability of the ball valve unit can be improved, that is, the ball valve unit can be adapted to different types of pipelines, and the advantage of strong compatibility is achieved; in addition, after the structure that the valve seat is threadedly connected with the valve body is used, when the sealing seat appears aging phenomenon under high temperature and high pressure, the valve seat can be first removed, and then the sealing seat and the valve core can be taken out from the inside of the valve body and the sealing seat can be replaced, so that the entire ball valve unit does not need to be replaced, that is, the replacement cost can be saved.

[0025] An outer circumferential wall of the valve seat 9 located outside the valve body 1 is provided with an outer convex part 92 in the shape of a regular hexagon; after the structure is used, when the valve seat with different types of pipeline connection interfaces is replaced, a wrench can be matched on the outer convex part located on the valve seat, so as to facilitate the disassembly and replacement of the valve seat.

[0026] When the two ball valve units need to be docked, first, the protruding part on one of the valve bodies is inserted into the slot on the other valve body, at this time, the annular convex rib on the inner end of the slot can tightly abut and circumferentially seal the sealing ring embedded in the protruding part, so as to achieve the purpose of reliably docking the valve bodies of the two ball valve units and achieving circumferential sealing, then the sliding member and the inverted buckle part on the two valve bodies are horizontally slid to wrap the inverted buckle part outside the two limiting blocks and the plug on the corresponding side and lock the plug in the limiting groove (after the two valve bodies are docked, the outer end of each linkage shaft will be pushed by the inner end of the other valve body and shrink into the valve body on the side, at this time, the sliding member and the inverted buckle part are allowed to move horizontally, and the inverted buckle part is wrapped outside the two limiting blocks and the plug on the corresponding side and locks the plug in the limiting groove), then the two ball valve units can be opened, after the two ball valve units are opened, fluid can flow through the two ball valve units, and in this state, the two ball valve units cannot be separated from each other, so as to achieve the purpose of interlocking, that is, the ball valve units can be prevented from being mistakenly separated, the leakage of fluid in the pipeline system is avoided, and the safety of the pipeline system is improved; when the two ball valve units need to be separated, first, the two ball valve units are closed through the handle, then the inverted buckle part is horizontally pushed to release the wrapping state of the inverted buckle part on the limiting block and the plug, and then the two ball valve units can be separated from each other.

[0027] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by the person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An interlocking ball valve assembly comprising two ball valve units; each ball valve unit comprising a valve body (1), a valve core (2), a valve stem (3), and a handle (4), wherein the valve core (2) is rotatably connected to the interior of the valve body (1), the valve stem (3) is rotatably connected to the valve body (1), the inner end of the valve stem (3) is drively connected to the valve core (2), and the outer end of the valve stem (3) is fixed to the handle (4); characterized in that: The inner ends of the two valve bodies (1) are fitted together and circumferentially sealed; two of the outer walls of each valve body (1) are respectively provided with insert blocks (11) and two spaced-apart limit blocks (12), and a limit groove (13) is formed between the two limit blocks (12). The insert blocks (11) on each valve body (1) are inserted into the limit groove (13) on the other valve body (1); each ball valve unit also includes a sliding member (5), which is horizontally slidably connected to the valve body (1) located on one side of the limit block (12). The outer end of the sliding member (5) is provided with a buckle (51); when the inner ends of the two valve bodies (1) are joined together, and after the sliding member (5) is slid, the buckle (51) is used to wrap around the outer side of the two limit blocks (12) and the insert blocks (11) on the corresponding side and lock the insert blocks (11) in the limit groove (13).

2. The interlocking ball valve assembly according to claim 1, characterized in that: One of the valve bodies (1) has an annular protrusion (14) on its inner end, and a sealing ring (6) is embedded in the end of the protrusion (14) away from the valve body (1). The other valve body (1) has a slot (15) that matches the protrusion (14) on its inner end, and an annular rib (151) is provided on the inner end of the slot (15). The protrusion (14) is inserted into the slot (15) to make the inner cavities of the two valve bodies (1) communicate, and the annular rib (151) is used to fit tightly against the sealing ring (6) and seal circumferentially.

3. The interlocking ball valve assembly according to claim 2, characterized in that: The protrusion (14) is coaxially provided with an annular groove (141) at the end away from the valve body (1). The cross-sectional shape of the annular groove (141) is dovetail-shaped. The sealing ring (6) is embedded in the annular groove (141). The outer end of the annular rib (151) forms an arc surface in the shape of a ring. The outer end of the annular rib (151) is tightly pressed against the sealing ring (6) to make the two valve bodies (1) circumferentially sealed.

4. The interlocking ball valve assembly according to any one of claims 1-3, characterized in that: A sliding groove (16) is provided on the valve body (1) located on one side of the two limiting blocks (12), and each sliding member (5) is horizontally slidably connected in the sliding groove (16) on the corresponding valve body (1).

5. The interlocking ball valve assembly according to claim 4, characterized in that: Each ball valve unit also includes a linkage shaft (7) and a spring (8); the inner side of the valve body (1) is provided with a slide cavity (17) communicating with the slide groove (16), the linkage shaft (7) is disposed in the slide cavity (17) and can slide along the axial direction of the ball valve unit, the inner end of the sliding member (5) is provided with a slide hole (52), the linkage shaft (7) is movably inserted in the slide hole (52) and can make the sliding member (5) slide horizontally relative to the linkage shaft (7), the spring (8) is sleeved on the outside of the linkage shaft (7), the two ends of the spring (8) abut against the first annular step (171) located on the inner wall of the slide cavity (17) and the second annular step (71) located on the outer wall of the linkage shaft (7), respectively, the spring (8) is used to apply elastic force to the linkage shaft (7) so that the outer side of the linkage shaft (7) The end extends out of the inner end of the valve body (1); a stop (53) is provided in the middle of the inner bottom of the sliding hole (52), and a notch (72) is provided at the bottom of the linkage shaft (7) for horizontally avoiding the stop (53). The inner wall surface of the notch (72) on the side away from the inner end of the valve body (1) forms an arc surface (721); when the spring (8) pushes the linkage shaft (7) so that the outer end of the linkage shaft (7) extends out of the inner end of the valve body (1), the side wall of the linkage shaft (7) is used to abut against the stop (53) to restrict the sliding member (5) from sliding horizontally relative to the linkage shaft (7). When the outer end of the linkage shaft (7) is pushed by the inner end of another valve body (1) and retracted into the valve body (1) on the side where it is located, the arc surface (721) and part of the notch (72) are horizontally aligned with the stop (53).

6. The interlocking ball valve assembly according to claim 5, characterized in that: The inner end of the linkage shaft (7) extends to the position of the valve stem (3). A groove (73) is provided on the inner end of the linkage shaft (7). An arc-shaped boss (31) is provided on the valve stem (3). The boss (31) is coaxially arranged with the valve stem (3). When the inner ends of the two valve bodies (1) are connected, and the ball valve unit is opened by rotating the handle (4), the boss (31) is used to slide horizontally into the groove (73) and restrict the linkage shaft (7) from sliding relative to the valve body (1).

7. The interlocking ball valve assembly according to any one of claims 1-3 or 5-6, characterized in that: Each ball valve unit also includes a valve seat (9); the inner end of the valve seat (9) is threaded into the outer end of the valve body (1) and is used to press the valve core (2) and the sealing seats (18) located on both sides of the valve core (2) into the valve body (1), and the outer end of the valve seat (9) forms a pipeline connection interface (91).

8. The interlocking ball valve assembly according to claim 7, characterized in that: A hexagonal protrusion (92) is provided on the outer peripheral wall of the valve seat (9) located outside the valve body (1).

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