Self-locking valve coupling

Abstract

The utility model discloses a self-locking valve coupling, which is characterized in that two groups of same structures are adopted for valve bodies, locking surfaces are respectively arranged on the front end surfaces of the two groups of valve bodies, and the two groups of valve bodies are locked and fixed through mutual locking of the locking surfaces; an inner cavity penetrating front and back is formed in the middle of the valve body, a ball valve is arranged in the inner cavity, the ball valve is rotationally connected in the direction perpendicular to the flowing direction of the inner cavity, a penetrating ball hole is formed in the middle of the ball valve, and blocking / penetrating of the inner cavity is achieved through deflection of the ball valve. The center of the bottom of the ball valve is fixed in the vertical direction through the first limiting pin, and the ball valve rotates in the direction of the central axis where the first limiting pin and the second limiting pin are located. The self-locking type valve coupler of the device has a wide application prospect through a double-valve-body structure, efficient fluid control, excellent sealing performance, convenient installation and maintenance, an advanced locking system and strong adaptability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve coupling technical field, concretely relates to a self -locking type valve coupling. BACKGROUND

[0002] Fluid valve coupling is a mechanical component used for connecting and transmitting torque, which plays an important role in industrial automation and fluid control. It not only transmits torque, but also integrates fluid control functions such as controlling the flow direction and pressure of fluid.

[0003] In industrial fluid control system, the design and connection mode of valve are crucial to the overall performance and safety of the system. Traditional valve connection mode mostly adopts threaded connection or flange connection, which has certain limitations in installation and maintenance, such as complex installation, poor sealing, easy loosening, etc. Therefore, it is particularly important to develop a high-efficiency, reliable and easy-to-operate valve connection device.

[0004] The sealing ring of traditional valve is easy to wear under high pressure or high flow rate, resulting in leakage and affecting the stable transmission of fluid. The existing connection mode usually needs professional tools and technical personnel, increasing the difficulty and cost of installation and maintenance. Some valves have complicated switching operation, which cannot respond quickly in emergency, affecting system safety. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a self-locking type valve coupling, which solves the above technical problems existing in the prior art.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A self-locking type valve coupling, comprising a valve body and a lock body,

[0008] The valve body adopts two groups of identical structure, and a locking surface is arranged on the front end face of each group of valve body, and the locking of the two groups of valve body is realized by the mutual locking of the locking surfaces;

[0009] The valve body forms an inner cavity body penetrating front and back in the middle, and a ball valve is arranged in the inner cavity body, the ball valve is connected in rotation perpendicular to the flow direction of the inner cavity body, and the middle of the ball valve forms a penetrating ball hole, and the blockage / penetration of the inner cavity body is realized by the deflection of the ball valve;

[0010] The bottom center of the ball valve is fixed vertically by a first limiting pin, and the top center of the ball valve is fixed vertically by a second limiting pin, and the ball valve rotates along the central axis direction of the first limiting pin and the second limiting pin;

[0011] The lock body comprises a lock platform, a rotating handle, a first lock piece and a second lock piece, the lock platform is located on the outer wall of the valve body; the rotating handle is connected with the second limiting pin and drives the deflection movement of the ball valve through the rotation of the rotating handle;

[0012] The first lock piece forms a locking fixation between the rotating handle and the lock platform;

[0013] The second lock piece is arranged along the flow direction of the valve body and synchronously penetrates the connecting holes on the two groups of valve bodies, and the locking of the second lock piece is realized through the first lock piece.

[0014] Further, the locking surface comprises a protruding part, an enlarged opening and an arc-shaped missing slot, the protruding part is arranged perpendicularly to the end surface where the locking surface is located, and the enlarged opening is flush with the front end surface where the locking surface is located, and an arc-shaped missing slot is formed in the transition area between the protruding part and the enlarged opening;

[0015] The arc-shaped missing slot on one of the valve bodies forms an insertion to the protruding part on the other valve body, and then the protruding part is embedded into the bottom of the enlarged opening through rotation, thereby forming mutual locking between the two groups of valve bodies.

[0016] The protruding part on the front end of the valve body forms an arch-shaped protruding body outward, so that the protruding body is locked with the inner wall of the enlarged opening on the other valve body.

[0017] Further, a guide groove is formed on the outer wall of the ball valve, which is synchronous with the opening direction of the ball hole, and the lower part of the second limiting pin is embedded in the guide groove, so that when the second limiting pin rotates, the ball valve located in the guide groove rotates along the central axis direction.

[0018] Further, an annular connecting groove is arranged on the outer edge of the front end surface of the inner cavity of the valve body, and a sealing ring is arranged in the connecting groove, the sealing ring is in a ring structure, and a reinforcing inner rib is arranged on the inner side of the inner wall of the sealing ring along the radial direction;

[0019] The outer end surface height of the sealing ring is higher than the outer end surface height of the annular connecting groove.

[0020] Further, a tower-shaped connecting part is connected to the outer end of the valve body, the front end of the tower-shaped connecting part is implanted into the inner cavity of the valve body, and the rear end extends outward;

[0021] The inner diameter of the through hole in the middle part of the tower-shaped connecting part is the same as the diameter of the ball hole of the ball valve.

[0022] Further, the front end portion outer wall where the tower type connecting portion is located is provided with annular bearing grooves, a plurality of groups of the annular bearing grooves are arranged along the central axis extension direction of the tower type connecting portion, and a sealing fastening ring is arranged in the annular bearing groove; the sealing fastening ring is a notched annular structure.

[0023] Further, an annular embedding groove is arranged in the outer end portion inner wall where the valve body is located, the annular embedding groove is matched with the innermost annular bearing groove of the tower type connecting portion, an annular protrusion is arranged outwardly along the outer periphery of the tower type connecting portion where the annular bearing groove is located, and the annular protrusion forms a limit for the outer end portion where the valve body is located.

[0024] The outermost side where the annular embedding groove is located is a vertical surface, and the position close to the ball valve is arranged as an inclined surface structure.

[0025] Further, the surface where the lock platform is located is provided with an arc-shaped limiting protrusion, the arc-shaped limiting protrusion as a whole presents 90 degrees, and a sunken embedding entrance is arranged at the end where the arc-shaped limiting protrusion is located, so that the sunken embedding entrance is used for bearing the rotating handle.

[0026] Further, two groups of first connecting holes in the transverse direction are arranged in the side where the rotating handle is located, the two groups of first connecting holes are arranged in the upper and lower directions, and a second connecting hole is arranged on the front end seat where the rotating handle is located; when the ball hole where the ball valve is located is completely opened, at this time, the rotating handle is embedded in the position where the sunken embedding entrance is located, the first connecting hole in the upper layer where the rotating handle is located is concentric with the second connecting hole, and the first locking piece is penetrated and fixed; when the ball hole where the ball valve is located is closed, the first locking piece is separated from the rotating handle, the rotating handle is lifted, and the ball hole is simultaneously rotated until the rotating handle is embedded in the sunken embedding entrance on the other side, so that the first connecting hole in the upper layer where the rotating handle is located is concentric with the second connecting hole, and the first locking piece is penetrated and fixed.

[0027] Further, the end portion where the second locking piece is located forms a ring type ring, and the first locking pieces on the two sides of the ball valve are simultaneously locked to the second locking piece.

[0028] The ball valve has the following beneficial effects:

[0029] 1. The device is provided with an annular connecting groove outside the locking surface of the inner cavity, an embedded sealing ring, a reinforcing inner rib is arranged on the inner wall of the inner cavity, the sealing performance and the overall strength are improved, and the annular connecting groove in the front end of the inner cavity is provided with a sealing ring, the outer end surface of the sealing ring is higher than the groove surface, so that good sealing is formed when the valve body is contacted, and fluid leakage is avoided.

[0030] 2, The ball valve used in the device is arranged to rotate freely in the inner cavity, and the deflection of the ball hole is used to realize the complete blocking or through of the fluid. This design ensures the quick switching of fluid flow and improves the flexibility of operation. When the ball valve is in the open state, it can maintain a floating state when impacted by the fluid, reducing the direct impact on the inner wall and prolonging the service life. In the case of using a floating ball valve, the force arm for opening or closing the rotary handle connected thereto can be reduced.

[0031] 3, The design of the tower type connecting part of the device facilitates connection with pipe fittings or pipelines, and adapts to different installation requirements. The design of the annular bearing groove and the sealing fastening ring improves the fastening and sealing performance of the connection. The annular embedded groove matches the annular bearing groove of the tower type connecting part, reduces the misalignment during assembly, and ensures the sealing performance.

[0032] 4, The combination of the rotary handle, the first locking piece and the second locking piece on the device provides a convenient valve operation mode. Through the rotation of the handle, the on-off state of the ball valve can be easily switched, while ensuring the stability of the locking. At the same time, the design of the arc-shaped limiting protrusion on the locking platform and the sunken embedded entrance ensures the accurate fixation of the rotary handle at different positions, avoiding misoperation.

[0033] 5, The self-locking valve coupling of the device provides an efficient and reliable valve connection solution through the double valve body structure, efficient fluid control, superior sealing performance, convenient installation and maintenance, advanced locking system and strong adaptability, which has broad application prospects. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description.

[0035] Figure 1 is the overall structure schematic diagram of the embodiment of the present application;

[0036] Figure 2 is the top view structure schematic diagram of the embodiment of the present application;

[0037] Figure 3 is the valve body structure schematic diagram of the embodiment of the present application;

[0038] Figure 4 is the valve body assembly state structure schematic diagram of the embodiment of the present application;

[0039] Figure 5 is the sealing ring structure schematic diagram of the embodiment of the present application;

[0040] Figure 6 is the ball valve structure schematic diagram of the embodiment of the present application;

[0041] Figure 7 This is a schematic diagram of the tower-type connecting part structure according to an embodiment of the present utility model;

[0042] Figure 8 This is an embodiment of the present utility model. Figure 4 Cross-sectional structural diagram;

[0043] Figure 9 This is an embodiment of the present utility model. Figure 8 A schematic diagram of the structure at point A;

[0044] Figure 10 This is a schematic diagram of the sealing and fastening ring structure according to an embodiment of the present invention;

[0045] Figure 11 This is a schematic diagram of the rotating handle structure according to an embodiment of the present utility model;

[0046] Figure 12 This is a schematic diagram of the second locking component structure according to an embodiment of the present utility model;

[0047] Figure 13 This is a schematic cross-sectional view of the two sets of valve bodies in the locked state according to an embodiment of the present invention;

[0048] Figure 14 This is an embodiment of the present utility model. Figure 13 A partial structural diagram at point B in the middle. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0050] like Figure 1 , Figure 2 As shown, this embodiment of the present invention provides a self-locking valve coupling, including a valve body 1 and a locking body 4.

[0051] The valve body 1 adopts two identical structures, and a locking surface 2 is provided on the front end face of the two valve bodies 1 respectively. The locking and fixing between the two valve bodies 1 is achieved by the interlocking of the locking surfaces 2.

[0052] like Figure 3As shown, the valve body 1 is in the middle of the inner cavity 101 formed before and after the through, and is provided with a ball valve 3 in the inner cavity 101, so that the ball valve 3 is connected to the inner cavity 101 in the direction of rotation perpendicular to the flow, and the middle of the ball valve 3 is formed with a through ball hole 301, and the deflection of the ball valve 3 realizes the blockage / passage of the inner cavity 101, that is, when the ball hole 301 is the same as the flow direction of the inner cavity 101, that is, the full opening is realized, when the ball hole 301 is perpendicular to the flow direction of the inner cavity 101, that is, the ball valve 3 forms the flow direction of the inner cavity 101.

[0053] The outer side of the inner cavity 101 of the valve body 1 is provided with an annular connecting groove 103 (in order to improve the overall strength of the valve body 1, one-time pouring forming can be used), and the sealing ring 102 is carried in the connecting groove 102. The sealing ring 102 is in the form of a ring, and a reinforcing inner rib 1021 is provided on the inner side of the inner wall of the sealing ring 102 along the radial direction. This reinforcing inner rib 1021 can form a support in the thickness direction (for example Figure 5 The outer end surface of the sealing ring 102 is higher than the outer end surface of the annular connecting groove 103. When the end surfaces of the two groups of sealing rings 102 on the valve body 1 contact each other, the gap between the two groups of sealing rings 102 can be sealed, thereby ensuring the sealing of the inner cavity 101 during fluid transmission.

[0054] The bottom center of the ball valve 3 is fixed vertically by the first limiting pin 302, and the top center of the ball valve 3 is fixed vertically by the second limiting pin 303, and the ball valve 3 is rotated along the central axis of the first limiting pin 302 and the second limiting pin 303. By this way, the ball valve 3 can be freely switched in the inner cavity 101.

[0055] As shown in the figure Figure 6 The outer wall of the ball valve 3 is provided with a guide groove 304 in the same direction as the opening of the ball hole 301, and the lower part of the second limiting pin 303 is embedded in the guide groove 304, so that the second limiting pin 303 rotates synchronously with the ball valve 3 in the central axis direction. When the ball hole 301 of the ball valve 3 is coaxial with the inner cavity 101, the whole ball valve 3 is in an open state. The opened ball valve 3 will be impacted by the fluid and produce an impact on the front end surface of the valve body 1. At this time, the second limiting pin 303 is not completely fixed to the upper part of the ball valve 3, so that the impact on the ball valve 3 produces a movement allowance in the impact direction, which can reduce the direct impact of the inner wall of the ball valve 3 (that is, the whole ball valve 3 is in a floating state), thereby prolonging the service life. At this time, the front end of the ball valve 3 is provided with an annular buffer ring 305 on the inner side of the inner cavity 101 (for details Figure 14), through the buffer ring 305 can form the filling of the gap between the front end of the ball valve 3 and the inner cavity 101, and can reduce the overflow from the ball valve 3 connection gap when the flow of corrosive liquid, affecting the service life of the ball valve 3.

[0056] When the ball valve 3 is closed as a whole, the direction of the guide groove 304 is perpendicular to the extension direction of the inner cavity 101, which can form a closed state of the ball valve 3, and the vertical setting of the guide groove 304 will not produce floating or shaking, so its overall sealing is higher.

[0057] The locking surface 2 comprises a protruding part 21, an enlarged mouth 22 and an arc-shaped slot 23, the protruding part 21 is perpendicular to the end face of the locking surface 2, and the enlarged mouth 22 is flush with the front end face of the locking surface 2, and the arc-shaped slot 23 is formed in the transition zone between the protruding part 41 and the enlarged mouth 42; at this time, the protruding part 21 on one of the valve bodies 1 is fitted and embedded in the arc-shaped slot 23 on the other valve body 1, and then the two valve bodies 1 are rotated relative to each other, so that the front end of the protruding part 21 on one valve body 1 is embedded in the bottom of the enlarged mouth 22 on the other valve body 1, that is, the two valve bodies 1 are locked with each other. In order to ensure the firmness of the locking, an arch-shaped protruding body 211 is formed on the front end of the protruding part 21, which is locked with the inner wall of the enlarged mouth 22 on the other valve body 1, that is, when the two valve bodies 1 are locked with each other, they can also withstand a larger pressure capacity.

[0058] The tower type connecting part 5 is connected to the outer end of the valve body 1, the front end of the tower type connecting part 5 is embedded into the inner cavity 101 of the valve body 1, and the rear end extends outward, which can be connected with a pipe or a pipeline, that is, the actual needs are adjusted and installed.

[0059] The inner diameter of the through hole in the middle part of the tower type connecting part 5 is the same as the diameter of the ball hole 301 of the ball valve 3, which ensures the smooth stability of the fluid transmission process.

[0060] As shown in Figure 7 , the outer wall of the front end of the tower type connecting part 5 is provided with a ring-shaped bearing groove 501, which is provided with a plurality of groups along the extension direction of the central axis of the tower type connecting part 5, and a sealing fastening ring 502 is arranged in the ring-shaped bearing groove 501, which is a notched ring structure (as shown in Figure 10 ), which is convenient for installation with the ring-shaped bearing groove 501, and when the tower type connecting part 5 is connected with the rear end of the valve body 1, it is matched with the inner wall of the valve body 1, which improves the fastening and also improves the overall sealing.

[0061] As shown in Figure 8 , Figure 9As shown, an annular embedding groove 111 is provided on the inner wall of the outer end of the valve body 1, so that the annular embedding groove 111 matches the innermost annular bearing groove 501 of the tower-type connecting part 5. An annular protrusion 503 extends outward from the outer periphery of the tower-type connecting part 5 where the annular bearing groove 501 is located, so that the annular protrusion 503 limits the outer end of the valve body 1. Therefore, during assembly, the annular protrusion 503 can match the connection position between the valve body 1 and the tower-type connecting part 5, reducing misalignment, thereby achieving mutual engagement and matching between the sealing fastening ring 502 and the annular protrusion 503 and the annular bearing groove 501.

[0062] The outermost side of the annular embedded groove 111 is vertical, and the position near the ball valve 3 is set as an inclined structure. This method facilitates the installation of the annular protrusion 503. During assembly, the sealing fastening ring 502 and the annular bearing groove 501 are directly engaged with each other, and then the tower-type connecting part 5 is implanted into the rear end of the valve body 1.

[0063] like Figure 4 As shown, the locking body 4 includes a locking platform 41 and a rotating handle 42 (as shown). Figure 11 (as shown), first locking fastener 43, second locking fastener 44 (as shown) Figure 12 As shown), the locking platform 41 is located on the outer wall of the valve body 1 (and forms an integral part with the outer wall of the valve body 1); the rotating handle 42 is connected to the second limit pin 303, and the rotation of the rotating handle 42 synchronously drives the deflection movement of the ball valve 3.

[0064] The first locking element 43 secures the rotating handle 42 to the locking platform 41;

[0065] The second locking element 44 is arranged along the flow direction of the valve body 1 and simultaneously passes through the connecting holes 401 located on the two sets of valve bodies 1. The first locking element 43 is used to lock the second locking element 44.

[0066] like Figure 13 As shown, the surface of the locking platform 41 is provided with an arc-shaped limiting protrusion 411, and the arc-shaped limiting protrusion 411 is 90 degrees in the whole. At the end of the arc-shaped limiting protrusion 411, there is a recessed insertion port 412, so that the recessed insertion port 412 is used to support the rotating handle 42. When the rotating handle 42 is inserted into the recessed insertion port 412 in the same direction as the extension of the inner cavity 101, the ball valve 3 is in the open state and plays a role in fixing and limiting the rotating handle 42. When the rotating handle 42 is inserted into the recessed insertion port 412 in the direction perpendicular to the extension of the inner cavity 101, the ball valve 3 is in the closed state.

[0067] The first connecting hole 421 is transversely through the side where the rotating handle 42 is located, and the two groups of first connecting holes 421 are distributed above and below. Meanwhile, the second connecting hole 422 is arranged on the front end seat 402 where the rotating handle 42 is located. When the second connecting hole 422 matches the upper first connecting hole 421 on the side where the rotating handle 42 is located, and is fixed by the first lock piece 43, the rotating handle 42 is embedded in the sunken embedding entrance 412 which has the same extension direction as the inner cavity 101, that is, the ball hole 301 of the ball valve 3 is completely opened.

[0068] When the second connecting hole 422 matches the lower first connecting hole 421 on the side where the rotating handle 42 is located, and is fixed by the first lock piece 43, the outer end of the rotating handle 42 is lifted and disconnected from the sunken embedding entrance 412. Then, the whole is rotated until the rotating handle 42 drives the ball valve 3 to rotate 90 degrees (the ball valve 3 completely blocks the inside of the inner cavity 101), and then the end of the rotating handle 42 is placed in the sunken embedding entrance 412 again. The first lock piece 43 is simultaneously through the upper first connecting hole 421 and the second connecting hole 422, thereby limiting the relative position of the rotating handle 42.

[0069] The end of the second lock piece 44 forms a ring type ring, and the first lock piece 43 on both sides of the ball valve 3 is locked synchronously. That is, when the ball valve 3 is opened, the first lock piece 43 on both ends of the valve body 1 locks the rotating handle 42, and when the ball valve 3 is closed, the first lock piece 43 on both ends of the valve body 1 locks the rotating handle 42 (at this time, the two groups of first lock pieces 43 are close to each other, and the second lock piece 44 is used to lock the two groups of first lock pieces 43 at the same time, thereby ensuring the stability of the first lock piece 43 after locking). At the same time, the second lock piece 44 is simultaneously through the connecting hole 401 on the two groups of valve bodies 1 (in the locked state, the connecting hole 401 on the two groups of valve bodies 1 is coaxially arranged at this time).

[0070] The design of the self-locking valve coupling is not only suitable for water treatment, petroleum chemical industry, food processing and other industries, but also can be customized according to different fluid characteristics and working environment to meet the market demand for efficient fluid control. With the development of industrial automation and intelligence, the application potential of the valve coupling will be further expanded.

[0071] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A self-locking valve coupling, comprising a valve body (1) and a locking body (4), characterized in that, the valve body (1) adopts two groups of identical structures, and a locking surface (2) is arranged on the front end surface of each group of valve bodies (1), and the locking and fixing between the two groups of valve bodies (1) are realized by the mutual locking of the locking surfaces (2); an inner cavity (101) is formed in the middle of the valve body (1) and penetrates the front and back, and a ball valve (3) is arranged in the inner cavity (101), the ball valve (3) is rotationally connected perpendicular to the flow direction of the inner cavity (101), and a through hole (301) is formed in the middle of the ball valve (3), and the deflection of the ball valve (3) realizes the blockage / penetration of the inner cavity (101); the bottom center of the ball valve (3) is fixed vertically by a first limiting pin (302), and the top center of the ball valve (3) is fixed vertically by a second limiting pin (303), and the ball valve (3) is rotationally movable along the central axis direction of the first limiting pin (302) and the second limiting pin (303); the locking body (4) comprises a locking platform (41), a rotating handle (42), a first locking piece (43) and a second locking piece (44), the locking platform (41) is arranged on the outer wall of the valve body (1), the rotating handle (42) is connected with the second limiting pin (303), and the rotation of the rotating handle (42) synchronously drives the deflection of the ball valve (3); the first locking piece (43) forms a locking and fixing between the rotating handle (42) and the locking platform (41); the second locking piece (44) is arranged along the flow direction of the valve body (1) and synchronously penetrates the connecting holes (401) arranged on the two groups of valve bodies (1), and the first locking piece (43) realizes the locking of the second locking piece (44).

2. The self-locking valve coupling according to claim 1, characterized in that the locking surface (2) comprises a protruding part (21), an enlarged opening (22) and an arc-shaped missing slot (23), the protruding part (21) is arranged perpendicular to the end surface of the locking surface (2), the enlarged opening (22) is flush with the front end surface of the locking surface (2), and the arc-shaped missing slot (23) is formed between the protruding part (21) and the enlarged opening (22); the arc-shaped missing slot (23) arranged on one group of valve bodies (1) forms an insertion to the protruding part (21) arranged on the other group of valve bodies (1), and then the protruding part (21) is rotated and embedded into the bottom of the enlarged opening (22), so as to realize the mutual locking between the two groups of valve bodies (1); an arch-shaped protruding body (211) is formed on the front end of the protruding part (21), and the protruding body (211) is locked with the inner wall of the enlarged opening (22) arranged on the other group of valve bodies (1).

3. The self-locking valve coupling according to claim 1, wherein The outer wall upper portion of the ball valve (3) is provided with a guide groove (304) which is synchronous with the opening direction of the ball hole (301), and the lower portion of the second limiting pin (303) is embedded in the guide groove (304), so that when the second limiting pin (303) rotates, it synchronously drives the ball valve (3) located in the guide groove (304) to rotate along the central axis direction.

4. The self-locking valve coupling of claim 1, wherein, An annular connecting groove (103) is arranged on the outer side of the front end face of the inner cavity (101) of the valve body (1), and a sealing ring (102) is carried in the connecting groove (103). The sealing ring (102) is in a ring structure, and a reinforcing inner rib (1021) is arranged on the inner side of the inner wall of the sealing ring (102) along the radial direction. The outer end face height of the sealing ring (102) is higher than the outer end face height of the annular connecting groove (103).

5. The self-locking valve coupling of claim 1, wherein, A tower connecting portion (5) is connected to the outer end of the valve body (1), the front end of the tower connecting portion (5) is implanted into the inner cavity (101) of the valve body (1), and the rear end extends outward. The inner diameter of the through hole of the middle portion of the tower connecting portion (5) is the same as the diameter of the ball hole (301) of the ball valve (3).

6. The self-locking valve coupling according to claim 5, wherein The outer wall of the front end portion of the tower connecting portion (5) is provided with an annular bearing groove (501), which is arranged in multiple groups along the extension direction of the central axis of the tower connecting portion (5), and a sealing fastening ring (502) is arranged in the annular bearing groove (501). The sealing fastening ring (502) is a notched ring structure.

7. The self-locking valve coupling according to claim 5, wherein An annular embedding groove (111) is arranged on the inner wall of the outer end of the valve body (1), which matches with the innermost annular bearing groove (501) of the tower connecting portion (5), and an annular protrusion (503) extends outward from the outer periphery of the tower connecting portion (5) where the annular bearing groove (501) is located, so that the annular protrusion (503) limits the outer end of the valve body (1). The outermost surface of the annular embedding groove (111) is a vertical surface, and the position close to the ball valve (3) is arranged as an inclined surface structure.

8. The self-locking valve coupling of claim 1, wherein, The surface of the lock platform (41) is provided with an arc-shaped limiting protrusion (411), which is 90 degrees in whole, and a sunken embedding entrance (412) is arranged at the end of the arc-shaped limiting protrusion (411), which is used to carry the rotating handle (42).

9. The self-locking valve coupling of claim 1, wherein, Two groups of first connecting holes (421) are arranged in the side where the rotating handle (42) is located, and the two groups of first connecting holes (421) are arranged in an up-down distribution, and a second connecting hole (422) is arranged on the front end seat (402) where the rotating handle (42) is located; when the ball hole (301) where the ball valve (3) is located is completely opened, at this time, the rotating handle (42) is embedded in the position where the sunken embedding entrance (412) is located, so that the first connecting hole (421) on the upper layer where the rotating handle (42) is located is concentric with the second connecting hole (422), and is fixed by penetrating the first locking piece (43); when the ball hole (301) where the ball valve (3) is located is closed, the first locking piece (43) is separated from the rotating handle (42), and the rotating handle (42) is lifted to rotate the ball hole (301) synchronously until it is transported to the sunken embedding entrance (412) on the other side and is embedded, so that the first connecting hole (421) on the upper layer where the rotating handle (42) is located is concentric with the second connecting hole (422), and is fixed by penetrating the first locking piece (43).

10. The self-locking valve coupling of claim 1, wherein, The end where the second locking piece (44) is located is formed in a ring type ring, and the first locking piece (43) on the two sides of the ball valve (3) is locked to the second locking piece (44) synchronously.

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