A double ball valve

Abstract

The application discloses a double-ball valve, which comprises two ball valves arranged side by side and connected through clamping, each ball valve comprising a valve body, a valve rod and a handle, the valve body comprising an abutting surface provided with a clamping structure, the valve rod being capable of switching the ball valve between a flow-through state and a closed state during rotation along the axis of the valve rod. The ball valve further comprises a first anti-misoperation device and a second anti-misoperation device. The first anti-misoperation device comprises a rotating member and a sliding member, the rotating member being fixed to the valve rod and provided with a clamping groove, the clamping groove being capable of clamping the sliding member and pushing the sliding member to reciprocate in a first direction during rotation of the rotating member, the sliding member extending out of the abutting surface and being inserted into the other ball valve when the ball valve is in the flow-through state. The second anti-misoperation device is used for locking the handle in the closed state when the two ball valves are separated. The two anti-misoperation devices provide multiple protection for the ball valve, avoiding misoperation of the valve.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more particularly to a double ball valve. Background Technology

[0002] A double ball valve combines two ball valves for use. When a problem occurs in the pipeline connected to one ball valve, requiring disassembly or repair, the other ball valve is closed, allowing for easy removal and repair of the problematic valve and pipeline. This eliminates the need for leak sealing and is convenient to use. For quick assembly, the two ball valves are often connected using a snap-fit ​​mechanism. Existing snap-fit ​​designs involve a groove at one end of one ball valve, surrounding the fluid passage, and a latch at one end of the other ball valve. The latch is inserted into the groove and rotated to complete the snap-fit. After snap-fitting, both ball valves are then rotated to the open position.

[0003] Existing double-ball valves have a low safety factor and lack anti-tampering devices. When the two ball valves are open, they may separate, causing fluid leakage. To address this issue, Chinese patent application CN202211424375.1 proposes three anti-accidental contact devices to prevent the two ball valves from separating when open. However, this type of ball valve requires specially shaped limit seats and handles for proper positioning, limiting its applicability. Summary of the Invention

[0004] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide a double ball valve that provides multiple protections for the ball valve and avoids misoperation of the valve.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a double ball valve, comprising two ball valves arranged side by side and interlocked, each ball valve comprising a valve body, a valve stem, and a handle, the valve body comprising an abutment surface with an interlocking structure, the valve stem switching the ball valve between a flow-through state and a closed state during rotation along its own axis, and the ball valve further comprising:

[0006] The first anti-accidental touch device includes a rotating component and a sliding component. The rotating component is fixed to the valve stem and has a slot on it. During rotation, the slot can engage with the sliding component and push the sliding component to reciprocate along a first direction. When the ball valve is in the flow state, the sliding component extends out of the contact surface and inserts into another ball valve.

[0007] The second anti-accidental contact device is used to lock the handle in a closed state when the two ball valves are separated. The second anti-accidental contact device includes a locking mechanism and a positioning groove. The locking mechanism is disposed on the valve body and the positioning groove is disposed on the handle. When the ball valve is in a closed state, the locking mechanism can be engaged with the positioning groove.

[0008] The beneficial effects of this invention are as follows:

[0009] Both anti-accidental contact devices are linked to the handle. These two devices greatly improve the safety of ball valve use, ensuring that the ball valve can only be disengaged when closed, thus preventing fluid leakage.

[0010] During rotation, the rotating component of the first anti-accidental contact device can be engaged with the slot and the sliding frame to push the sliding component to slide. This ensures that during the opening and closing of the ball valve, the sliding component is driven to slide. The sliding component can extend out of the valve body and insert into another ball valve to limit the relative rotation between the two ball valves and prevent the two ball valves from separating and leaking liquid.

[0011] The second anti-accidental operation device ensures that the handles of the two ball valves can be freely rotated only when they are in the locked state. When the two ball valves are separated, i.e., one end of a single ball valve is the free end, the anti-accidental operation device will temporarily restrict the handle to the closed state of the ball valve, reducing the risk of accidental operation of the ball valves when they are not properly connected.

[0012] Furthermore, the rotating component includes a first part, the sidewall of which is an arc surface coaxial with the valve stem. The first part is connected to a second part protruding from its sidewall. The joint between the first part and the second part is provided with an inwardly recessed groove. The sliding component is slidably connected to the valve body and located on one side of the first part. The sliding component includes a locking part, which includes a first rod and a first boss and a second boss arranged circumferentially along the first rod. During rotation, the groove can engage with the first boss and drive the sliding component to reciprocate along a first direction to extend or retract the valve body.

[0013] During rotation, the rotating component can push the sliding component to slide through the slot and the first boss. Simultaneously, when the slot disengages from the first boss, the first and second bosses limit the position of the sliding component. This ensures that during the opening and closing of the ball valve, the sliding component slides. When the ball valve is in the flow state, the first part limits the position of the first and second bosses, allowing the sliding component to extend out of the valve body and insert into another ball valve to limit the relative rotation between the two ball valves, preventing leakage due to separation. When the ball valve is closed, the sliding component is pulled back into the valve body by the slot, separating it from the other ball valve. At this point, the two ball valves can be separated for maintenance. The anti-accidental contact mechanism ensures that the two ball valves can only be separated when closed, effectively preventing misoperation and leakage.

[0014] Furthermore, the slot is triangular, and the slot includes a first inclined surface and a second inclined surface. The first boss includes a third inclined surface and a fourth inclined surface, and the third inclined surface and the fourth inclined surface can respectively abut against the first inclined surface and the second inclined surface.

[0015] The cooperation of the two inclined surfaces allows the slot to push the first boss during rotation. Through the cooperation of the first and third inclined surfaces, the slider is pushed to slide in the positive direction of the first direction. When the rotating part rotates clockwise, through the cooperation of the second and third inclined surfaces, the slider is pushed to slide in the negative direction of the first direction.

[0016] Furthermore, both the first and second parts are sector rings coaxial with the valve stem, with the outer radius of the second part being larger than that of the first part. The two sector rings with different outer radii form a rotating component, which facilitates the machining of the rotating component.

[0017] Furthermore, the first boss and the second boss are located at both ends of the first rod. The first rod is tangent to the sidewall of the first part. A second rod is provided on the side of the first boss away from the first rod, and the radius of the second rod is smaller than the radius of the first rod. The first part uses its own curvature to position a portion of the first part between the first boss and the second boss. At this time, due to the limitation of the first part, the slider cannot continue to slide along the ground. The third rod makes way for the rotation of the second part.

[0018] Furthermore, the locking mechanism includes a positioning bead, a positioning pin, and a reset component. The positioning bead can reciprocate along the valve body in the second direction, and one end of the positioning pin extends into an abutment surface. The positioning pin can reciprocate along the valve body in the first direction.

[0019] When the two ball valves are engaged, the first positioning pin can approach the first reset member under the push of the other ball valve. At this time, the first positioning pin can provide clearance for the first positioning bead to fall. When the two ball valves are separated, the first positioning pin moves away from the first reset member under the push of the first reset member. The first positioning pin can push the first positioning bead upward and embed part of the first positioning bead into the first positioning groove.

[0020] Furthermore, the valve body has a first groove for sliding the positioning pin and a second groove for sliding the positioning bead. The first and second grooves are perpendicularly arranged and interconnected. The depth of the second groove is less than the diameter of the positioning bead. The depth of the second groove ensures that when there is no clearance space to communicate with it, the positioning bead will inevitably protrude partially from the second groove, i.e., protrude from the valve body.

[0021] The positioning pin 1 includes a sliding part 1 that matches the slide groove 1. The middle of the sliding part 1 is recessed inward along the circumferential direction to form a groove 1. When the groove 1 moves to the bottom of the slide groove 2, the groove 1 and the slide groove 2 are connected and form a clearance space 1 for the positioning bead 1 to be fully embedded.

[0022] Furthermore, both sides of the first groove are beveled, and the opening of the first groove is a flared structure. The flared beveled surface facilitates the rolling of the first positioning bead and the separation of the two.

[0023] Furthermore, the ball valve also includes a third anti-accidental contact device, which is used to lock the handle in the flow-through state and the closed state. The third anti-accidental contact device includes a second locking mechanism and a second positioning groove. The second locking mechanism is disposed on the handle and moves synchronously with the handle. The second positioning groove is provided in two places and corresponds to the flow-through state and the closed state of the ball valve, respectively. The locking mechanism can be engaged with the second positioning groove to limit the position of the handle.

[0024] The third anti-accidental touch device moves synchronously with the handle, is installed on the handle, will not be lost, and can only be unlocked by external force, thus avoiding accidental touch of the handle and malfunction of the ball valve.

[0025] Furthermore, the second locking mechanism includes a second positioning bead, a second positioning pin, and a second reset member. The second positioning bead can reciprocate along the handle in the second direction. The second positioning pin can move horizontally along the handle and be reset by the push of the second reset member. When the second positioning pin is pushed by an external force, it approaches the second reset member. At this time, the second positioning pin can provide clearance space for the second positioning bead to move upward. When the second positioning pin is driven away from the second reset member, it can push the second positioning bead downward and limit part of the second positioning bead within the second positioning groove.

[0026] When the handle is turned, external force must be used to push the second positioning pin to overcome the thrust provided by the second reset component, allowing the second positioning pin to move to a position that provides clearance for the second positioning bead to move upward. Only then can the handle be pushed to move the second positioning bead upward using the second positioning groove, thus unlocking the handle. When the second positioning bead reaches the second positioning groove, external force releases the second positioning pin, which resets under the drive of the second reset component. At this point, the second positioning bead moves downward under the force of gravity and the push of the second positioning pin and partially engages in the second positioning groove. The second positioning pin returns to its initial position and restricts the upward movement of the second positioning bead, thus locking the handle. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the ball valve in an embodiment of the present invention;

[0028] Figure 2 This is a side view of the ball valve in an embodiment of the present invention;

[0029] Figure 3 The ball valve is in the flow-through state. Figure 2 AA-line sectional view;

[0030] Figure 4 The ball valve is in the closed state. Figure 2 AA-line sectional view;

[0031] Figure 5 This is a schematic diagram of the rotating component in an embodiment of the present invention;

[0032] Figure 6 This is a three-dimensional structural diagram of the sliding member in an embodiment of the present invention;

[0033] Figure 7 for Figure 2 Sectional view of the middle BB line;

[0034] Figure 8 This is a cross-sectional view of the third anti-accidental touch device in an embodiment of the present invention.

[0035] In the picture:

[0036] 1. Valve body;

[0037] 11. Sliding channel; 12. Positioning hole; 13. Abutment surface; 141. Slide groove one; 142. Slide groove two; 151. Slide groove three; 152. Slide groove four;

[0038] 2. Valve stem;

[0039] 3. Handle;

[0040] 4. First anti-accidental touch device;

[0041] 41. Rotating component; 411. First part; 412. Second part; 413. Slot; 4131. First inclined surface; 4132. Second inclined surface;

[0042] 42. Sliding member; 421. First rod; 422. First boss; 4221. Third inclined surface; 4222. Fourth inclined surface; 423. Second boss; 424. Second rod; 425. Third rod;

[0043] 5. Second anti-accidental touch device;

[0044] 51. Positioning bead; 52. Positioning pin; 521. Groove; 53. Reset piece; 54. Positioning slot;

[0045] 6. Third anti-accidental touch device;

[0046] 61. Two positioning beads; 62. Two positioning pins; 621. Two grooves; 63. Two reset pieces; 64. Two positioning slots. Detailed Implementation

[0047] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0048] See appendix Figure 1 and attached Figure 2 As shown, the present invention provides a double ball valve, comprising two ball valves arranged side-by-side and interlocked. Each ball valve includes a valve body 1, a valve stem 2, and a handle 3. The valve body 1 includes an abutment surface 13, on which a snap-fit ​​structure is provided. The snap-fit ​​structures of the two balls engage with each other to achieve the interlocking of the two ball valves. When the abutment surfaces 13 of the two ball valves are aligned, rotating one ball valve will achieve the interlocking of the two snap-fit ​​structures.

[0049] The valve stem 2 and the handle 3 are fixedly connected. The handle 3 is located outside the valve body 1. The valve stem 2 passes through the valve body 1 and is fixedly connected to a ball. When the handle 3 drives the ball to rotate through the valve stem 2, the ball valve switches between the flow-through state and the closed state. The rotation angle of the handle 3 is 90°.

[0050] The ball valve also includes a first anti-accidental contact device 4 and a second anti-accidental contact device 5. The first anti-accidental contact device 4 is used to connect two ball valves when the ball valve is in the flow state, preventing the two ball valves from rotating relative to each other and separating. The second anti-accidental contact device 5 allows the two ball valves to rotate the handle 3 freely only when they are engaged, locking the ball valve in the closed state when it is separated from the other ball valve. Both anti-accidental contact devices are linked to the handle 3. These two anti-accidental contact devices greatly improve the safety of the ball valve, ensuring that the ball valve can only be separated in the closed state, thus preventing fluid leakage.

[0051] See appendix Figure 3 and attached Figure 4 As shown, the first anti-accidental contact device 4 includes a rotating member 41 and a sliding member 42. The rotating member 41 is fixed to the valve stem 2 and a slot 413 is provided on the rotating member 41. During the rotation of the rotating member 41, the slot 413 can engage with the sliding member 42 and push the sliding member 42 to move back and forth along the first direction (fluid movement direction). When the ball valve is in the flow state, the sliding member 42 extends out the contact surface 13 and inserts into another ball valve.

[0052] See appendix Figure 5 As shown, the rotating component 41 is fixed on the valve stem 2. The rotating component 41 includes a first part 411, the side wall of which is an arc surface coaxial with the valve stem 2. The first part 411 is connected to a second part 412 that protrudes from its side wall. A recessed groove 413 is formed at the joint of the first part 411 and the second part 412.

[0053] The sliding member 42 is slidably connected to the valve body 1 and located on one side of the first part 411. The sliding member 42 includes a locking part, which includes a first rod 421 and a first boss 422 and a second boss 423 extending outward along the circumference of the first rod 421. During the rotation of the rotating member 41, the locking groove 413 can engage with the first boss 422 to drive the sliding member 42 to reciprocate along a first direction. When the ball valve is in the flow-through state, the locking groove 413 disengages from the first boss 422, and a portion of the sliding member 42 extends out of the abutment surface of the valve body 1. The portions of the first boss 422 and the second boss 423 abut against the side wall of the first part 411. At this time, a limiting groove is formed between the first boss 422 and the second boss 423. A portion of the first part 411 is located within this limiting groove to limit the position of the sliding member 42 and prevent the sliding member 42 from moving. When the ball valve is in the closed state, the slot 413 engages with the first boss 422 and pushes the sliding member 42 back into the valve body 1, at which point the two ball valves can rotate and separate.

[0054] See appendix Figure 3 As shown, when the ball valve is in the flow-through state, the sliding member 42 can extend out of the valve body 1 and insert into another ball valve to limit the relative rotation between the two ball valves, preventing leakage due to the separation of the two ball valves; see Appendix Figure 4 As shown, when the ball valve is in the closed state, the sliding member 42 is pulled back into the valve body 1 by the retaining groove 413, and only then can it be separated from the other ball valve. The first anti-accidental contact device 4 ensures that the two ball valves can only be rotated and separated when closed, effectively avoiding misoperation and leakage.

[0055] In one embodiment, see Appendix Figure 5 As shown, both the first part 411 and the second part 412 are sector rings coaxial with the valve stem 2, and the outer radius R2 of the second part 412 is larger than the outer radius R1 of the first part 411. Both the first part 411 and the second part 412 are at 90°, meaning the two sector rings are joined together in the horizontal plane to form the rotating member 41. Alternatively, the first part 411 can be a single ring, and the second part 412 can be a protrusion along the side wall of the first part 411. In this case, the rotating member 41 can also push the sliding member 42 through the slot 413, and the position of the sliding member 42 is limited by the arcuate side wall of the first part 411.

[0056] See appendix Figure 5 As shown, the slot 413 is triangular, extending inward (towards the valve stem 2) along the junction of the side walls of the first part 411 and the second part 412. The slot 413 includes a first inclined surface 4131 and a second inclined surface 4132. The first inclined surface 4131 connects to the side wall of the second part 412, and the second inclined surface 4132 connects to the side wall of the first part 411. See Appendix Figure 6As shown, the first boss 422 includes a third inclined surface 4221 and a fourth inclined surface 4222, which can abut against the first inclined surface 4131 and the second inclined surface 4132, respectively. When the slot and the first boss 422 are engaged, the first inclined surface 4131 and the third inclined surface 4221 have the same inclination direction, and the third inclined surface 4221 and the fourth inclined surface 4222 have the same inclination direction.

[0057] The rotation direction of rotating component 41 is shown in the appendix. Figure 4 The arrow indicates that when the rotating member 41 rotates clockwise, the cooperation of the first inclined surface 4131 and the third inclined surface 4221 pushes the sliding member 42 to slide downward in the first direction; when the rotating member 41 rotates counterclockwise, the cooperation of the second inclined surface 4132 and the third inclined surface 4221 pushes the sliding member 42 to slide downward in the first direction.

[0058] See appendix Figure 3 and attached Figure 4 As shown, a sliding channel 11 is provided on the valve body 1, and the sliding member 42 reciprocates within the sliding channel 11 along the axis of the sliding channel 11. The sliding channel 11 guides the sliding of the sliding member 42, allowing the sliding member 42 to slide only along the sliding channel 11.

[0059] See appendix Figure 6 As shown, the slider 42 also includes a plug-in portion connected to the snap-fit ​​portion. The plug-in portion includes a second rod 424 coaxial with the first rod 421. The second rod 424 matches the sliding channel 11 and extends out of the valve body 1 to insert another ball valve. The radius of the second rod 424 is the same as or slightly smaller than the radius of the sliding channel 11, so that the slider 42 will not deviate when sliding within the sliding channel 11. The end of the second rod 424 extends out of the sliding channel 11. During the sliding process of the slider 42, the second rod 424 is always partially located within the sliding channel 11 to provide guidance within the sliding channel 11.

[0060] The first protrusion 422 and the second protrusion 423 are located at both ends of the first rod 421. The first rod 421 is tangent to the side wall of the first part 411, and at this time, a portion of the first rod 421 can abut against a portion of the side wall of the first part 411. The first part 411 uses its own curvature to position a portion of the first part 411 between the first protrusion 422 and the second protrusion 423. At this time, due to the limitation of the first part 411, the slider 42 cannot continue to slide along the first direction.

[0061] The engaging portion also includes a third rod 425 coaxial with the first rod 421. The third rod 425 is located on the side of the first boss 422 away from the first rod 421, and the radius of the third rod 425 is smaller than the radius of the first rod 421. A clearance groove is formed between the third rod 425 and the side wall of the guide channel to make way for the second part 412. When the rotating member 41 rotates to engage with the first boss 422 in the slot 413, the second part 412 will move to the corresponding position of the third rod 425. Because the outer radius of the second part 412 is larger than the outer radius of the first part 411, the radius of the third rod 425 is reduced to make way for the second part 412. At the same time, the third rod 425 connects the first boss 422 and the second rod 424 into a whole. The difference between the radii of the third rod 425 and the first rod 421 is greater than the difference between the outer radii of the first part 411 and the second part 412, providing sufficient space for the movement of the second part 412.

[0062] The valve body 1 has a positioning hole 12 along the abutment surface 13, into which the sliding member 42 of another ball valve is inserted. When one ball valve is in the flow state, the sliding member 42 extends out of the valve body 1 and inserts into the positioning hole 12 of the other ball valve, thereby avoiding misoperation between the two ball valves. Only when the ball valve is in the closed state will the sliding member 42 slide out of the positioning hole 12 and retract into the valve body 1, at which time the two ball valves can rotate and separate from each other.

[0063] The second anti-accidental-touch device 5 ensures that the handle 3 can be rotated to the open state only when the two ball valves are in the locked position. That is, when the two ball valves are not connected and are separated, the handle 3 can only be in the closed position and cannot be rotated to open the ball valves. In this case, the second anti-accidental-touch device 5 locks the ball valves in the closed position. See appendix. Figure 2 and attached Figure 7 As shown, the second anti-accidental contact device 5 includes a locking mechanism 1 and a positioning groove 54. The locking mechanism 1 is disposed on the valve body 1, and the positioning groove 54 is disposed on the handle 3. When the ball valve is in the closed state, the locking mechanism 1 can be locked into the positioning groove 54 and the handle 3 is limited to this position.

[0064] The locking mechanism includes a positioning bead 51, a positioning pin 52, and a reset element 53. The positioning bead 51 can reciprocate along the valve body 1 in a second direction (a vertical direction perpendicular to the first direction). The positioning pin is slidably connected to the valve body 1 and one end can extend out of the valve body 1. The positioning pin 52 can reciprocate along the valve body 1 in the first direction. When the two ball valves are engaged, the positioning pin 52 can move towards the reset element 53 under the push of the abutment surface 13 of the other ball valve. At this time, the positioning pin 52 can provide clearance space for the positioning bead 51. Under the action of gravity, the positioning bead 51 moves downward and is completely embedded in the valve body 1. At this time, the positioning bead 51 has no limiting effect on the handle 3, and the handle 3 can rotate.

[0065] When the two ball valves separate, due to the limitation of the first anti-accidental contact device 4, the two ball valves can only separate when they are in the closed state. At this time, the positioning pin 52 is driven away from the reset member 53 and resets. The positioning pin 52 can push the positioning bead 51 upward and limit part of the positioning bead 51 in the positioning groove 54, so that the handle 3 is kept in the closed state of the ball valve. After the two ball valves are engaged, the abutment surface 13 of one ball valve will push the positioning pin 52 of the other ball valve toward the reset member 53. The positioning pin 52 moves to a position that provides clearance space for the positioning bead 51 to move upward. At this time, the positioning bead 51 is fully embedded in the valve seat and will not limit the handle 3. The double ball valve is in the use state and the handle 3 can be rotated freely.

[0066] See appendix Figure 7 As shown, the valve body 1 has a first groove 141 and a second groove 142. The first groove 141 and the second groove 142 are vertically arranged and interconnected. The first groove 141 extends along a first direction. One end of the second groove 142 is located in the middle of the first groove 141. The first groove 141 and the second groove 142 form a T-shaped structure. The positioning pin 52 slides in the first groove 141, and the positioning bead 51 slides in the second groove 142. The width of the second groove 142 is greater than the diameter of the positioning bead 51, allowing the positioning bead 51 to slide in the second groove 142. The depth of the second groove 142 is less than the diameter of the positioning bead 51. In the initial state, part of the positioning bead 51 protrudes from the second groove 142.

[0067] The positioning pin 52 includes a sliding portion 1 that matches the slide groove 141. The middle of the sliding portion 1 is recessed inward along the circumferential direction to form a groove 521. When the groove 521 moves to directly below the slide groove 142, the groove 521 and the slide groove 142 are connected and form a clearance space 1 for the positioning bead 51 to be fully embedded. The end of the sliding portion 1 abuts against the surface 13 when pushed by the reset member.

[0068] When the other parts of sliding part one move to directly below sliding groove two 142, the other parts of sliding part one close the connection between sliding groove two 142 and sliding groove one 141. Positioning bead one 51 can only be inside sliding groove two 142. At this time, since the height of sliding groove two 142 is less than the diameter of positioning bead one 51, positioning bead one 51 will inevitably protrude part of sliding groove two 142, that is, protrude from valve body 1 and be inserted into positioning groove one 54. When groove one 521 moves to directly below sliding groove two 142, groove one 521 and sliding groove two 142 are connected and form clearance space one with sliding groove one 141, that is, the depth of sliding groove two 142 is increased. The sum of the depth of sliding groove two 142 and clearance space one is greater than the diameter of positioning bead one 51, ensuring that positioning bead one 51 can be completely embedded in valve body 1. At this time, the third anti-accidental contact device 6 on the top of handle 3 is released, and the position of handle 3 can be adjusted at any time.

[0069] In one embodiment, see Appendix Figure 7 As shown, the sidewall of groove 521 is inclined, that is, the opening of groove 521 is flared. When positioning pin 52 is reset, positioning bead 51 can slide along the inclined surface of the flared structure of groove 521. The inclined surface cooperates to push positioning bead 51 to roll, reducing the hard contact between positioning bead 51 and positioning pin 52, and improving the service life of positioning bead 51 and positioning pin 52.

[0070] The reset element 53 is a spring, which is embedded in the slide groove 141. One end of the spring abuts against the bottom of the slide groove 141, and the other end abuts against the end of the positioning pin 52. When the positioning pin 52 retracts into the slide groove 141, the spring is in a compressed state.

[0071] In one embodiment, the ball valve further includes a third anti-accidental contact device 6, which is used to lock the handle 3 in both the flow-through and closed states. In this state, force must be applied to the third anti-accidental contact device 6 to unlock it and allow the handle 3 to rotate, preventing accidental rotation of the handle 3 due to accidental impact. Thus, the three anti-accidental contact devices provide triple protection for the valve, improving valve safety.

[0072] The third anti-accidental activation device includes a second locking mechanism installed on the handle 3 of the ball valve. The second locking mechanism can move synchronously with the handle 3. The valve body 1 is provided with a second positioning groove 64 corresponding to the second locking mechanism. There are two positioning grooves 64, located in the first position and the second position respectively. When the second locking mechanism moves above the first position or the second position, it can be locked into the corresponding positioning groove 64. At this time, the ball valve is in the flow-through state or the closed state.

[0073] See appendix Figure 8 As shown, the second locking mechanism includes a second positioning pin 62, a second reset member 63, and a second positioning bead 61. The second positioning bead 61 can reciprocate vertically along the handle 3. The second positioning pin 62 is slidably connected to the handle 3 and can move horizontally under the push of external force and the reset member. When the second positioning pin 62 is pushed closer to the second reset member 63 by external force, it provides clearance space for the upward movement of the second positioning bead 61. When the second positioning pin 62 is driven away from the second reset member 63, it can push the second positioning bead 61 downward and partially confine the second positioning bead 61 within the second positioning groove 64.

[0074] In one embodiment, the depth of the second positioning groove 64 is less than the radius of the second positioning bead 61, and only a small portion of the second positioning bead 61 can be embedded in the second positioning groove 64, that is, the portion of the second positioning bead 61 embedded in the second positioning groove 64 is less than half of the second positioning bead 61. This depth of the second positioning groove 64 ensures that the handle 3 will push the second positioning bead 61 out of the second positioning groove 64 during rotation.

[0075] The handle 3 has a sliding groove 3 151 and a sliding groove 4 152. The sliding grooves 3 151 and 4 152 are perpendicular to each other and are connected. One end of the sliding groove 4 152 is located in the middle of the sliding groove 3 151. The sliding groove 3 151 is for the sliding of the positioning pin 2 62, and the sliding groove 4 152 is for the sliding of the positioning bead 2 61. The positioning pin 2 62 has the same structure as the positioning pin 1 52. The positioning pin 2 62 includes a sliding part 2 and a groove 2 621.

[0076] When the second limiting part moves to directly above the fourth slide 152, the second positioning bead 61 can only be inside the fourth slide 152 at the connection between the second limiting part, the third slide 151, and the fourth slide 152. At this time, since the height of the fourth slide 152 is less than the diameter of the second positioning bead 61, the second positioning bead 61 will inevitably protrude part of the fourth slide 152, that is, protrude the handle 3.

[0077] When groove 2 621 moves directly above slide groove 4 152, groove 2 621 and slide groove 4 152 become connected and form clearance space 2 by limiting slide groove 1 141. This increases the height of slide groove 4 152, and the sum of the height of slide groove 4 152 and clearance space 2 is greater than the diameter of positioning bead 2 61, ensuring that positioning bead 2 61 can be fully embedded in handle 3. At this time, when external force rotates handle 3, positioning groove 2 64 can push positioning bead 2 61 upward and slide it out of positioning groove 2 64, releasing the fixation between positioning bead 2 61 and positioning groove 2 64, that is, releasing the positioning of handle 3.

[0078] The side wall of the positioning groove 2 64 is inclined, which makes it easy for the positioning bead 2 61 to roll out of the positioning groove 2 64.

[0079] In this embodiment, the handle 3, valve stem 2, and rotating component 41 are integrated into one piece.

[0080] Initially, the two ball valves are in the separated state, and the handle 3 is in the closed position. The positioning pin 52 presses the positioning bead 51 upward into the positioning groove 54, preventing the handle 3 from rotating. The slot 413 on the rotating part 41 engages with the sliding part 42 and pulls the sliding part 42 back into the valve body 1. After the two ball valves are engaged, the positioning pin 52, under the pressure of the corresponding valve body 1, continuously presses the reset part 53. At this time, the groove 521 remains in communication with the groove, and the positioning bead 51 moves down, releasing the restriction on the handle 3. Press the positioning pin 62, and then rotate the handle 3 to slide the positioning bead 61 out of one positioning groove 64 (ball valve closed state) until the positioning bead 61 moves into another positioning groove 64 (ball valve open state). Release the positioning pin 62, and the positioning bead 61, pushed by the positioning pin 62, embeds itself into the positioning groove 64 at this position and remains stationary. At this time, as the handle 3 drives the rotating part 41 to rotate, the slot 413 pushes the sliding part 42 to extend out of the valve body 1 and insert into the empty hole, thus limiting the sliding part 42 to this position and preventing it from moving. The two ball valves can no longer rotate relative to each other.

[0081] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A double ball valve, comprising two ball valves arranged side by side and clamped, each of the ball valves comprising a valve body, a valve stem and a handle, the valve body comprising an abutting surface arranged with a clamping structure, the valve stem allowing the ball valve to switch between a through-flow state and a closed state during rotation along its own axis, characterized in that: The ball valve further comprises: A first anti-misoperation device, which comprises a rotating member and a sliding member, the rotating member is fixed with the valve stem and is provided with a clamping groove, the clamping groove can be clamped with the sliding member and push the sliding member to reciprocate in a first direction during rotation of the rotating member, the sliding member extends out of the abutting surface and inserts into another ball valve when the ball valve is in the flow-through state; A second anti-misoperation device, which is used for locking the handle in the closed state when two ball valves are separated, the second anti-misoperation device comprises a locking mechanism one and a positioning groove one, the locking mechanism one is arranged on the valve body, and the positioning groove one is arranged on the handle, the locking mechanism one can be inserted into the positioning groove one when the ball valve is in the closed state; The rotating member comprises a first part, the side wall of the first part is a circular arc surface coaxial with the valve stem, the first part is connected with a second part protruding from the side wall, and the abutting portion of the first part and the second part is provided with a clamping groove recessed inwardly; the sliding member is slidingly connected with the valve body and located on one side of the first part, the sliding member comprises a clamping part, the clamping part comprises a first rod body and first and second protrusions extending outwardly along the circumference of the first rod body, the clamping groove can be clamped with the first protrusion and drive the sliding member to reciprocate in a first direction during rotation of the rotating member to extend or retract the valve body; The clamping groove is triangular, the clamping groove comprises first and second inclined surfaces, the first protrusion comprises third and fourth inclined surfaces, and the third and fourth inclined surfaces can abut against the first and second inclined surfaces, respectively; The first and second protrusions are located at two ends of the first rod body, the first rod body is tangent to the side wall of the first part, the side of the first protrusion away from the first rod body is provided with a second rod body, and the radius of the second rod body is smaller than that of the first rod body.

2. The double ball valve of claim 1, wherein: The first and second parts are both fan ring-shaped and coaxial with the valve stem, and the outer radius of the second part is greater than that of the first part.

3. The double ball valve of claim 1, wherein: The locking mechanism one comprises a positioning bead one, a positioning pin one and a reset member one, the positioning bead one can reciprocate in a second direction along the valve body, and the positioning pin one can reciprocate in a first direction along the valve body to extend out of the abutting surface or retract into the valve body; When the two ball valves are clamped, the positioning pin one can approach the reset member one under the push of another ball valve, at this time, the positioning pin one can provide a space for the falling of the positioning bead one; when the two ball valves are separated, the positioning pin one is reset under the push of the reset member one, the positioning pin one can push the positioning bead one to move upwardly and embed part of the positioning bead one into the positioning groove one.

4. The double ball valve of claim 3, wherein: The valve body is provided with a sliding groove one for sliding of the positioning pin one and a sliding groove two for sliding of the positioning bead one, the sliding groove one and the sliding groove two are vertically arranged and mutually communicated, and the depth of the sliding groove two is smaller than the diameter of the positioning bead one. The positioning pin comprises a sliding part I matched with the sliding groove I, and a groove I is recessed in the middle of the sliding part I in the circumferential direction to the inside, when the groove I moves directly below the sliding groove II, the groove I and the sliding groove II are in communication and form a space I for the positioning ball I to be completely embedded.

5. The double ball valve of claim 4, wherein: The two sides of the groove I are both inclined surfaces, and the opening of the groove I is an expanded structure.

6. The double ball valve of claim 1, wherein: The ball valve further comprises a third anti-misoperation device for locking the handle in the through-flow state and the closed state, the third anti-misoperation device comprises a locking mechanism II and a positioning groove II, the locking mechanism II is arranged on the handle and moves synchronously with the handle, the positioning groove II is arranged on the valve body and corresponds to the through-flow state and the closed state of the ball valve, and the locking mechanism can be clamped into the positioning groove II to limit the position of the handle.

7. The double ball valve of claim 6, wherein: The locking mechanism II comprises a positioning ball II, a positioning pin II and a reset member II, the positioning ball II can reciprocate in the second direction along the handle, the positioning pin II can move in the horizontal direction along the handle and is reset under the push of the reset member II, the positioning pin II is close to the reset member II under the push of external force, at this time, the positioning pin II can provide a space II for the upward movement of the positioning ball II, when the positioning pin II is driven away from the reset member II by the reset member II, the positioning pin II can push the positioning ball II to move downward and limit part of the positioning ball II in the positioning groove II.

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