Duplex three-way ball valve with adjustable inter-valve distance

Abstract

The invention relates to an inter-valve distance adjustable duplex three-way ball valve, which belongs to the technical field of valves, and comprises two symmetrically arranged ball valve bodies and a connecting rod for connecting the two ball valve bodies, the two ends of the connecting rod are respectively in transmission connection with valve rods of the two ball valve bodies, and an operating handle is arranged in the middle of the connecting rod. The connecting rod comprises a two-way screw and threaded sleeves symmetrically meshed with the two ends of the two-way screw, guide structures arranged in the axial direction of the threaded sleeves are arranged on the outer sides of the threaded sleeves, the operating handle is arranged in the middle of the two-way screw, and the threaded sleeves are coaxially fixed to valve rods of the corresponding ball valve bodies. And a locking mechanism is arranged between the two-way screw rod and the threaded sleeve. The length of the connecting rod is adjusted, the length of the connecting rod is ensured to be stable through the locking mechanism after adjustment is completed, stable adjustment of the distance between the two ball valve bodies is achieved, and therefore deployment flexibility and maintenance convenience under complex working conditions are improved; in the adjusting process, the operating handle is always located in the middle of the connecting rod, and two valves are evenly stressed.

Description

Technical Field

[0001] The present application relates to the field of valves, and in particular to a double three-way ball valve with adjustable valve distance. Background Art

[0002] A three-way ball valve is a key control component that uses a rotating valve core to divert, merge, or switch flow directions of pipeline media. With advantages such as low flow resistance and reliable sealing, it is widely used in industries such as petrochemicals, pharmaceuticals, and heating systems. However, in complex working conditions involving the simultaneous control of multiple pipelines, a single three-way ball valve cannot meet the needs of coordinated regulation of multiple media. This has led to the development of a double three-way ball valve structure—integrating two three-way ball valves through a mechanical linkage to achieve synchronized opening and closing or flow direction switching.

[0003] Currently, the dual-connected three-way ball valves on the market generally use a rigid connecting rod to fix the valve stems of the two ball valves together. The installation spacing between the two ball valves is determined at the factory and cannot be adjusted. This fixed design has significant drawbacks: First, when the spacing between the two connection ports in the actual pipeline layout does not match the inherent spacing of the ball valves, additional customized flanges, compensators, or hoses are required for adaptation, resulting in a surge in installation costs and an increased risk of system leakage. Second, in scenarios where space is limited or the pipeline configuration needs to be dynamically adjusted (such as modular equipment expansion or mobile device modification), the fixed-spacing dual-connected ball valves are forced to be disassembled and reassembled due to their lack of adaptability, seriously reducing operational efficiency. Summary of the Invention

[0004] In order to improve the deployment flexibility and maintenance convenience under complex working conditions, the present application provides a double three-way ball valve with adjustable valve distance.

[0005] The present application provides a double three-way ball valve with adjustable valve distance, which adopts the following technical solution:

[0006] A double three-way ball valve with adjustable valve distance comprises two symmetrically arranged ball valve bodies and a connecting rod connecting the two. The two ends of the connecting rod are respectively connected to the valve stems of the two ball valve bodies in a transmission manner. An operating handle is provided in the middle of the connecting rod. The connecting rod comprises a bidirectional screw and a threaded sleeve symmetrically engaged at both ends thereof. The outer side of the threaded sleeve is provided with a guide structure arranged along its axial direction. The operating handle is provided in the middle of the bidirectional screw. Each threaded sleeve is coaxially fixed to the valve stem of the corresponding ball valve body. A locking mechanism is provided between the bidirectional screw and the threaded sleeve.

[0007] By adopting the above technical solution, the distance between the two ball valve bodies can be adjusted through the matching structure of the bidirectional screw and the threaded sleeve, thereby overcoming the poor installation adaptability problem caused by the fixed spacing of the traditional double ball valve, thereby improving the deployment flexibility and maintenance convenience under complex working conditions; by setting the guide structure on the outside of the threaded sleeve, the external guide device is used to cooperate with the guide structure during adjustment to ensure that the threaded sleeves on both sides of the bidirectional screw produce synchronous movement toward or away from each other, thereby ensuring that the operating handle is always located in the middle of the connecting rod, so that the two ball valve bodies are evenly stressed; by setting the locking mechanism, it is ensured that the two ball valve bodies maintain a stable distance after the distance adjustment is completed, avoiding the distance retreat caused by external force or vibration, and ensuring the stable control capability of the double three-way ball valve under complex working conditions.

[0008] Optionally, the locking mechanism includes:

[0009] A locking assembly is provided at both ends of the bidirectional screw, and the locking assembly is telescopically arranged along the radial direction of the bidirectional screw;

[0010] A clamping groove extending axially along the inner wall of the threaded sleeve;

[0011] When the distance between valves is adjusted, the locking assembly retracts into the radial profile of the bidirectional screw;

[0012] When the adjustment is completed, the locking assembly extends out of the radial profile of the bidirectional screw and is embedded in the clamping groove.

[0013] By adopting the above technical solution and utilizing the cooperation between the locking assembly and the snap-in groove, the locking assembly can be disengaged from the snap-in groove during the adjustment process, thereby facilitating relative movement between the bidirectional screw and the threaded sleeve, thereby realizing the length adjustment of the connecting rod; after the length adjustment of the connecting rod is completed, the locking assembly is embedded in the snap-in groove, and the axial displacement and relative rotation of the screw and the sleeve are simultaneously limited through mechanical interference, thereby ensuring the stability of the distance between the valves.

[0014] Optionally, the locking assembly includes a locking pin and a first elastic member arranged from the inside to the outside along the radial direction of the bidirectional screw, the locking pin is set at the end of the bidirectional screw for radial sliding along the radial direction of the bidirectional screw, and a fixing plate is provided at both ends of the bidirectional screw, one end of the first elastic member is connected to the corresponding fixing plate, and the other end is connected to the corresponding locking pin.

[0015] By adopting the above technical solution, when the distance between the valves is adjusted, the first elastic member is compressed to retract the locking pin into the radial profile of the bidirectional screw, thereby unlocking the locking assembly and avoiding mechanical interference during the adjustment process; when the adjustment of the distance between the valves is completed and when the locking pin is rotated to a position relative to the snap-fit ​​groove, the first elastic member is released, the first elastic member is reset and the locking pin is ejected into the snap-fit ​​groove, and the locking pin and the snap-fit ​​groove are snapped into engagement, thereby achieving relative locking of the threaded sleeve and the bidirectional screw.

[0016] Optionally, an operating part is provided in the middle of the bidirectional screw, an operating hole is provided on the operating part, the operating handle passes through the operating hole, the locking pins at both ends of the bidirectional screw are connected to an unlocking rope, a guide hole is provided on the fixing plate, and channels are provided at both ends of the bidirectional screw, the channels are connected to the operating hole, and each unlocking rope passes through the corresponding guide hole and channel in turn and is connected to the operating handle.

[0017] The above-described technical solution simplifies the process of switching the locking assembly between locked and unlocked states. To unlock the assembly, the operating handle is twisted a certain angle, causing the unlocking cord to wrap around the side wall of the operating handle. The unlocking cord pulls the locking pin, causing it to retract into the radial profile of the bidirectional screw. Simultaneously, the first elastic member compresses and stores energy, allowing a single-handed operation to simultaneously unlock the locking assembly at both ends of the bidirectional screw. To restore the locking assembly, the operating handle is released. The first elastic member releases energy, driving the locking pin and the operating handle back to their original position, snapping the locking pin into the snap-in groove. This facilitates the locking pin and snap-in groove to engage, thereby locking the threaded sleeve and bidirectional screw relative to each other. Furthermore, the interconnecting design of the operating hole and the channel ensures that the unlocking cord is concealed within the screw, preventing the risk of external entanglement, extending the service life of the unlocking cord, and ensuring stable unlocking. Furthermore, the guide hole constrains and guides the unlocking cord's path, ensuring uniform force transmission, preventing the locking pin from stagnation on one side, and ensuring smooth switching between locked and unlocked states.

[0018] Optionally, a limiting groove is provided on the hole wall of the operating hole and is arranged along the circumference of the operating hole. The operating handle is provided with a plurality of limiting blocks, and the plurality of limiting blocks can be slidably arranged in the limiting groove so that the operating handle can be rotatably installed in the operating hole.

[0019] By adopting the above technical solution, the sliding cooperation between the limit groove and the limit block enables the operating handle to rotate only along its own axis, thereby preventing the operating handle from being affected by its own weight and causing axial displacement in the operating hole, thereby pulling the unlocking rope and causing the unlocking component to fail to lock.

[0020] Optionally, the side wall of the operating handle is provided with an installation groove along its circumference corresponding to the limit block, and the limit block slides in the corresponding installation groove, and an installation cavity is provided at one end of the operating handle, and each of the installation grooves is connected to the installation cavity. The operating handle is detachably equipped with a gripping end at one end close to the installation cavity, and a follower rod is provided at one end of the gripping end close to the installation cavity, and each of the limit blocks is provided with a guide wedge surface on a side close to the installation cavity, and the guide wedge surface is arranged toward the gripping end, and a bending portion is provided on the side of the guide wedge surface away from the gripping end and facing away from the gripping end, and a accommodating groove corresponding to the bending portion is provided on the cavity wall of the mounting cavity, and a second elastic member is connected between the bending portion and the groove wall of the accommodating groove.

[0021] By adopting the above technical solution, the cooperation between the guide wedge surface and the follower rod realizes the automatic radial extension and contraction of the limit block: when the gripping end is installed, the follower rod is inserted into the installation cavity, and through the setting of the guide wedge surface, the follower rod can squeeze the limit block, forcing the limit block to extend out of the installation slot and be pushed into the limit slot, and at the same time the second elastic member is compressed in the accommodating slot to realize the installation of the operating handle; when the gripping end is disassembled, the follower rod is pulled out of the installation cavity, the second elastic member is reset, and the limit block automatically retracts into the installation slot, realizing the rapid separation of the limit block and the limit slot, thereby facilitating the rapid disassembly and assembly of the operating handle.

[0022] Optionally, the ball valve body includes a valve seat and valve covers arranged at both ends of the valve seat, the valve core of the ball valve body is arranged in the valve seat, and the valve cover is provided with a guide hole for inserting a pipeline.

[0023] By adopting this technical solution, the valve cover contacts the pipe before the valve core when connected to the pipeline, preventing the pipe end face from directly impacting the valve core and damaging the sealing surface. The guide hole in the valve cover forms a coaxial guide with the pipe insertion end, facilitating correction of pipe deflection. Furthermore, when one end of the valve seat is connected to the pipe, the valve cover on the other end provides axial support for the valve core within the seat, preventing displacement or dislodging of the valve core under the pressure of the pipe connection and ensuring smooth opening and closing of the ball valve.

[0024] Optionally, the valve cover is fixedly connected to the valve seat via a flange, and one end of the valve cover extends into a corresponding interface of the valve seat.

[0025] By adopting the above technical solution, the structure in which the valve cover extends into the valve seat interface increases the centering accuracy during flange connection. The thickened valve cover facilitates the use of the side wall of the valve cover and the valve seat port for fitting and guiding, thereby reducing the risk of overload during flange bolt pre-tightening and improving sealing reliability. The valve cover serves as a physical isolation barrier between the valve core and the flange. The thickened valve cover can prevent the valve core from making hard contact with the flange after being impacted by pipeline vibration, thereby avoiding crushing or deformation of the sealing surface. In addition, the rigid support of the valve cover enhances the bending strength of the valve seat port, which is beneficial to suppress interface deformation and leakage caused by thermal expansion and contraction of the pipeline.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. This application realizes the adjustment of the distance between the two ball valve bodies through the cooperation structure of the bidirectional screw and the threaded sleeve, overcoming the poor installation adaptability problem caused by the fixed spacing of the traditional double ball valve, thereby improving the deployment flexibility and maintenance convenience under complex working conditions; by setting the guide structure on the outside of the threaded sleeve, the external guide device is used to cooperate with the guide structure during adjustment to ensure that the threaded sleeves on both sides of the bidirectional screw produce synchronous movement toward or away from each other, thereby ensuring that the operating handle is always located in the middle of the connecting rod; by setting the locking mechanism, it is ensured that the two ball valves maintain a stable distance after the distance adjustment is completed, avoiding the distance retreat caused by external force or vibration, and ensuring the stable control capability of the double ball valve under complex working conditions.

[0028] 2. This application simplifies the operating process of switching the locking and unlocking states of the locking assembly: when the locking assembly needs to be unlocked, the operating handle is turned at a certain angle, which allows the unlocking rope to be wrapped around the side wall of the operating handle. The unlocking rope pulls the locking pin, which can retract the locking pin into the radial profile of the bidirectional screw. At the same time, the first elastic member is compressed to store energy, thereby achieving a single-handed operation to simultaneously unlock the locking assembly at both ends of the bidirectional screw. When the locking state of the locking assembly needs to be restored, the operating handle is released. At this time, the first elastic member releases energy, driving the locking pin and the operating handle to reset, and the locking pin is ejected into the snap-fit ​​groove, which facilitates the snap-fitting of the locking pin and the snap-fit ​​groove, thereby achieving relative locking of the threaded sleeve and the bidirectional screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of a double three-way ball valve with adjustable valve distance according to an embodiment of the present application.

[0030] Figure 2 It is an exploded view of the ball valve body in the embodiment of the present application.

[0031] Figure 3 It is a cross-sectional view of the ball valve body in the embodiment of the present application.

[0032] Figure 4It is a schematic diagram of the structure of the connecting rod in the embodiment of the present application.

[0033] Figure 5 It is a cross-sectional view of the connecting rod in the embodiment of the present application.

[0034] Figure 6 It is a schematic structural diagram of the locking assembly in an embodiment of the present application.

[0035] Figure 7 yes Figure 5 A local enlarged schematic diagram of point A in the middle.

[0036] Explanation of the accompanying drawings: 1. Ball valve body; 11. Valve seat; 12. Valve cover; 121. Guide connection hole; 122. Flange; 2. Connecting rod; 21. Bidirectional screw; 211. Fixing plate; 2111. Guide hole; 212. Operating part; 213. Operating hole; 2131. Limiting groove; 214. Channel; 22. Threaded sleeve; 221. Guide structure; 3. Operating handle; 31. Limiting block; 311. Guide wedge surface; 312. Bending part; 32. Mounting groove; 33. Mounting cavity; 331. Accommodating groove; 332. Second elastic member; 34. Gripping end; 35. Follow-up rod; 4. Locking mechanism; 41. Locking assembly; 411. Locking pin; 412. First elastic member; 413. Unlocking rope; 42. Connecting groove. DETAILED DESCRIPTION

[0037] The following combination Figure 1-Figure 7 , further details of this application are given.

[0038] Example:

[0039] The embodiment of the present application discloses a double three-way ball valve with adjustable valve distance. Figure 1 A double-jointed three-way ball valve with adjustable intervalve distance comprises two symmetrically arranged ball valve bodies 1 and a connecting rod 2 connecting them. The ends of the connecting rod 2 are drivingly connected to the valve stems of the two ball valve bodies 1, and an operating handle 3 is located in the middle of the connecting rod 2. After the double-jointed three-way ball valve is connected to the pipeline, turning the operating handle 3 rotates the connecting rod 2. This rotation of the connecting rod 2 simultaneously rotates the valve stems of the two ball valve bodies 1, thereby achieving synchronized opening and closing or flow direction switching of the two ball valve bodies 1.

[0040] Reference Figure 2The ball valve body 1 includes a valve seat 11 and a valve cover 12 installed at both ends of the valve seat 11. The valve core of the ball valve body 1 is arranged in the valve seat 11, and the valve cover 12 is provided with a guide hole 121 for the insertion of the pipeline. When connecting to the pipeline, the valve cover 12 contacts the pipeline before the valve core to prevent the pipeline end face from directly hitting the valve core and causing damage to the sealing surface; and the guide hole 121 on the valve cover 12 forms a coaxial guide with the insertion end of the pipeline, thereby facilitating the correction of pipeline deflection. In addition, when one end of the valve seat 11 is docked with the pipeline, the valve cover 12 at the other end can play an axial supporting role on the valve core in the valve seat 11, preventing the valve core of the ball valve body 1 from being displaced or falling off under the pressure of pipeline docking, thereby ensuring the smooth opening and closing of the ball valve body 1.

[0041] Reference Figure 2 and Figure 3 , a flange 122 is fixed to the outer periphery of each valve cover 12, and the valve cover 12 is fixedly connected to the valve seat 11 through the flange 122, and one end of the valve cover 12 extends to the corresponding interface of the valve seat 11. The structure of the valve cover 12 extending into the interface of the valve seat 11 increases the centering accuracy when the flange 122 is connected, and facilitates the use of the side wall of the valve cover 12 and the port of the valve seat 11 for fitting and guiding, reducing the risk of overload when the flange 122 bolts are pre-tightened, and improving the sealing reliability; and the valve cover 12 is thickened in disguise, and the valve cover 12 serves as a physical isolation barrier between the valve core and the flange 122. By thickening the valve cover 12, the valve core can be prevented from hard contact with the flange 122 after being impacted by pipeline vibration, thereby avoiding crushing or deformation of the sealing surface; in addition, thickening the valve cover 12 is conducive to ensuring the rigid support of the valve cover 12, enhancing the bending strength of the port of the valve seat 11, and helping to suppress interface deformation and leakage caused by thermal expansion and contraction of the pipeline.

[0042] Reference Figure 1 、 Figure 4 and Figure 5 The connecting rod 2 includes a bidirectional screw 21 and a threaded sleeve 22 symmetrically engaged at both ends thereof. The outer side of the threaded sleeve 22 is provided with a guide structure 221 arranged along its axial direction. The guide structure 221 is a protrusion or groove structure. The operating handle 3 is arranged in the middle of the bidirectional screw 21. Each threaded sleeve 22 is coaxially fixed with the valve stem of the corresponding ball valve body 1. A locking mechanism 4 is provided between the bidirectional screw 21 and the threaded sleeve 22.

[0043] The double three-way ball valve achieves adjustment of the distance between the two ball valve bodies 1 through the matching structure of the bidirectional screw 21 and the threaded sleeve 22, overcoming the poor installation adaptability problem caused by the fixed spacing of the traditional double ball valve, thereby improving the deployment flexibility and maintenance convenience under complex working conditions; through the setting of the guide structure 221 on the outside of the threaded sleeve 22, the external guide device is used to cooperate with the guide structure 221 on the outside of the threaded sleeve 22 during adjustment. The external guide device can be a seat structure or a frame structure, and the external guide device is provided with a groove or a protrusion structure that is compatible with the guide structure 221. During use, after unlocking the locking mechanism 4, manually rotate the operating handle 3 to drive the bidirectional screw 21 to rotate, and then guide the threaded sleeves 22 on both sides through the external guide device, so that the threaded sleeves 22 on both sides of the bidirectional screw 21 move synchronously toward or away from each other, thereby ensuring that the operating handle 3 is always located in the middle of the connecting rod 2, so that the two ball valve bodies 1 are evenly stressed; the setting of the locking mechanism 4 ensures that the two ball valves maintain a stable distance after the distance adjustment is completed, avoiding the distance retreat caused by external force or vibration, and ensuring the stable control capability of the double ball valve under complex working conditions.

[0044] Reference Figure 5 and Figure 6 The locking mechanism 4 includes a locking assembly 41 and a snap-in groove 42. Two locking assemblies 41 are symmetrically arranged at either end of the bidirectional screw 21, and are extendable radially along the bidirectional screw 21. The snap-in groove 42 is located inside the threaded sleeve 22 and extends axially along the threaded sleeve 22. When adjusting the inter-valve distance, the locking assembly 41 retracts into the radial profile of the bidirectional screw 21. When adjustment is complete, the locking assembly 41 extends beyond the radial profile of the bidirectional screw 21 and engages with the snap-in groove 42. Thus, due to the cooperation between the locking assembly 41 and the snap-in groove 42, the locking assembly 41 disengages from the snap-in groove 42 during adjustment, facilitating relative movement between the bidirectional screw 21 and the threaded sleeve 22, thereby adjusting the length of the connecting rod 2. After adjustment is complete, the locking assembly 41 engages with the snap-in groove 42, limiting both axial displacement and relative rotation of the screw and sleeve through mechanical interference, thereby ensuring the stability of the inter-valve distance.

[0045] Reference Figure 5 and Figure 6The locking assembly 41 includes a locking pin 411 and a first elastic member 412, which are arranged radially from the inside to the outside of the bidirectional screw 21. The locking pin 411 is slidably disposed at the end of the bidirectional screw 21 along the radial direction of the bidirectional screw 21. A fixing plate 211 is fixed to each end surface of the bidirectional screw 21. One end of the first elastic member 412 is fixed to the corresponding fixing plate 211, and the other end is fixed to the corresponding locking pin 411. In this embodiment, the first elastic member 412 is a compression spring. When adjusting the distance between valves, the first elastic member 412 is compressed, so that the locking pin 411 is retracted into the radial profile of the bidirectional screw 21, thereby unlocking the locking assembly 41 and avoiding mechanical interference during the adjustment process; when the adjustment of the distance between valves is completed and when the locking pin 411 is rotated to a position relative to the snap-fit ​​groove 42, the first elastic member 412 is released, the first elastic member 412 is reset and the locking pin 411 is ejected into the snap-fit ​​groove 42, and the locking pin 411 is snap-fitted with the snap-fit ​​groove 42, thereby achieving relative locking of the threaded sleeve 22 and the bidirectional screw 21.

[0046] Reference Figure 4 、 Figure 5 and Figure 6 An operating portion 212 is fixed to the middle of the bidirectional screw 21. An operating hole 213 is provided through the operating portion 212 from top to bottom. The operating handle 3 passes through the operating hole 213. The locking pins 411 at both ends of the bidirectional screw 21 are connected to an unlocking rope 413 at one end near the corresponding first elastic member 412. A guide hole 2111 is provided on the fixing plate 211. A hole 214 is provided at both ends of the bidirectional screw 21 along its own axial direction. The hole 214 is connected to the operating hole 213. Each unlocking rope 413 passes through the corresponding guide hole 2111 and the hole 214 in sequence and is fixed to the side wall of the operating handle 3.

[0047] When the locking assembly 41 needs to be unlocked, the operating handle 3 is turned at a certain angle, so that the unlocking rope 413 is wrapped around the side wall of the operating handle 3. The unlocking rope 413 pulls the locking pin 411, which can retract the locking pin 411 into the radial profile of the bidirectional screw 21. At the same time, the first elastic member 412 is compressed to store energy, thereby achieving a single-handed operation to simultaneously unlock the locking assembly 41 at both ends of the bidirectional screw 21. When the locking state of the locking assembly 41 needs to be restored, the operating handle 3 is released. At this time, the first elastic member releases energy, driving the locking pin 411 and the operating handle 3 to reset, and the locking pin 411 is ejected into the engaging groove 42, so that the locking pin 411 and the engaging groove 42 are engaged, thereby achieving relative locking of the threaded sleeve 22 and the bidirectional screw 21. In addition, the connection design between the operating hole 213 and the channel 214 ensures the concealed wiring of the unlocking rope 413 inside the screw, avoids the risk of external entanglement, extends the service life of the unlocking rope 413, and ensures the stability of the unlocking of the unlocking rope 413; at the same time, the guide hole 2111 constrains and guides the path of the unlocking rope 413, ensures the uniform transmission of tension, avoids the jamming of the unilateral locking pin 411, and ensures the smoothness of the locking assembly 41 when switching between the locked and unlocked states.

[0048] Reference Figure 5 and Figure 7 The operating hole 213 has a circumferentially circumferentially extending retaining grooves 2131 formed on its wall. The operating handle 3 is provided with a plurality of retaining blocks 31 that slide along the retaining grooves 2131, allowing the operating handle 3 to be rotatably mounted within the operating hole 213. The sliding engagement between the retaining grooves 2131 and the retaining blocks 31 allows the operating handle 3 to rotate only along its own axial direction, preventing the operating handle 3 from being axially displaced within the operating hole 213 due to its own weight, thereby pulling the unlocking rope 413 and causing the unlocking assembly to fail.

[0049] Reference Figure 5 and Figure 7The operating handle 3 has mounting grooves 32 formed along its circumference on its sidewall, corresponding to the stop blocks 31. The stop blocks 31 slideably fit into the corresponding mounting grooves 32. A mounting cavity 33 is formed at one end of the operating handle 3. Each mounting groove 32 communicates with the mounting cavity 33. A gripping end 34 is detachably mounted on the end of the operating handle 3 adjacent to the mounting cavity 33. In this embodiment, the gripping end 34 is snap-fitted or threadedly connected to the end of the mounting cavity 33. A follower rod 35 is fixed to the end of the gripping end 34 near the mounting cavity 33. Each stopper 31 is provided with a guide wedge surface 311 on the side near the mounting cavity 33, facing the gripping end 34. A bent portion 312 is fixed to the end of the guide wedge surface 311 facing away from the gripping end 34 and facing away from the gripping end 34. A receiving groove 331 corresponding to the bent portion 312 is defined in the wall of the mounting cavity 33. A second elastic member 332 is connected between the bent portion 312 and the wall of the receiving groove 331. In this embodiment, the second elastic member 332 is a compression spring.

[0050] After the operating handle 3 is inserted into the operating hole 213, the gripping end 34 is installed at the end of the mounting cavity 33. When the gripping end 34 is installed, the follower rod 35 is inserted into the mounting cavity 33, and through the setting of the guide wedge surface 311, the follower rod 35 can squeeze the limit block 31, forcing the limit block 31 to extend out of the mounting groove 32 and be pushed into the limit groove 2131. At the same time, the second elastic member 332 is compressed in the accommodating groove 331 to realize the installation of the operating handle 3; when the gripping end 34 is disassembled, the follower rod 35 is pulled out of the mounting cavity 33, the second elastic member 332 is reset, and the limit block 31 is automatically retracted into the mounting groove 32, realizing the rapid separation of the limit block 31 from the limit groove 2131, and then the operating handle 3 can be pulled out from the operating hole 213, which is convenient for the rapid disassembly and assembly of the operating handle 3.

[0051] The implementation principle of a double three-way ball valve with adjustable valve distance in the embodiment of the present application is: through the cooperation structure of the two-way screw 21 and the threaded sleeve 22, the distance between the two ball valve bodies 1 is adjusted, overcoming the poor installation adaptability problem caused by the fixed spacing of the traditional double ball valve, thereby improving the deployment flexibility and maintenance convenience under complex working conditions; through the setting of the guide structure 221 on the outside of the threaded sleeve 22, the external guide device is used to cooperate with the guide structure 221 during adjustment, which can ensure that the threaded sleeves 22 on both sides of the two-way screw 21 produce synchronous movement toward or away from each other, thereby ensuring that the operating handle 3 is always located in the middle of the connecting rod 2, so that the two ball valve bodies 1 are evenly stressed. By utilizing the cooperation between the locking assembly 41 and the snap-fit ​​groove 42, the locking assembly 41 disengages from the snap-fit ​​groove 42 during the adjustment process, facilitating relative movement between the bidirectional screw 21 and the threaded sleeve 22, thereby realizing length adjustment of the connecting rod 2; after the length adjustment of the connecting rod 2 is completed, the locking assembly 41 is embedded in the snap-fit ​​groove 42, and through mechanical interference, the axial displacement and relative rotation of the screw and the sleeve are simultaneously limited, thereby ensuring the stability of the distance between the valves and the stable control capability of the double three-way ball valve under complex working conditions.

[0052] In addition, the double-jointed three-way ball valve simplifies the operating process for switching the locking assembly 41 between the locked and unlocked states: when the locking assembly 41 needs to be unlocked, the operating handle 3 is turned a certain angle, which causes the unlocking rope 413 to be wrapped around the side wall of the operating handle 3. The unlocking rope 413 pulls the locking pin 411, causing the locking pin 411 to retract into the radial profile of the bidirectional screw 21. At the same time, the first elastic member 412 is compressed to store energy, thereby achieving a single-handed operation to simultaneously unlock the locking assembly 41 at both ends of the bidirectional screw 21. When the locking state of the locking assembly 41 needs to be restored, the operating handle 3 is released. At this time, the first elastic member releases energy, driving the locking pin 411 and the operating handle 3 to reset, and the locking pin 411 is ejected into the engaging groove 42, facilitating the engaging engagement between the locking pin 411 and the engaging groove 42, thereby achieving relative locking of the threaded sleeve 22 and the bidirectional screw 21.

[0053] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A double three-way ball valve with adjustable valve distance, comprising two symmetrically arranged ball valve bodies (1) and a connecting rod (2) connecting the two, wherein the two ends of the connecting rod (2) are respectively connected to the valve stems of the two ball valve bodies (1), and an operating handle (3) is provided in the middle of the connecting rod (2), characterized in that: The connecting rod (2) includes a bidirectional screw (21) and threaded sleeves (22) symmetrically engaged at both ends thereof, the outer side of the threaded sleeve (22) is provided with a guide structure (221) arranged along its axial direction, the operating handle (3) is provided in the middle of the bidirectional screw (21), each threaded sleeve (22) is coaxially fixed with the valve stem of the corresponding ball valve body (1), and a locking mechanism (4) is provided between the bidirectional screw (21) and the threaded sleeve (22).

2. A double three-way ball valve with adjustable valve distance according to claim 1, characterized in that: The locking mechanism (4) comprises: A locking assembly (41) is provided at both ends of the bidirectional screw (21), and the locking assembly (41) is telescopically arranged along the radial direction of the bidirectional screw (21); A clamping groove (42) extending axially along the inner wall of the threaded sleeve (22); When adjusting the distance between valves, the locking assembly (41) is retracted into the radial profile of the bidirectional screw (21); When the adjustment is completed, the locking assembly (41) extends out of the radial profile of the bidirectional screw (21) and is embedded in the clamping groove (42).

3. The double three-way ball valve with adjustable valve distance according to claim 2, characterized in that: The locking assembly (41) comprises a locking pin (411) and a first elastic member (412) arranged from inside to outside along the radial direction of the bidirectional screw (21); the locking pin (411) is arranged at the end of the bidirectional screw (21) so as to slide along the radial direction of the bidirectional screw (21); fixed plates (211) are provided at both ends of the bidirectional screw (21); one end of the first elastic member (412) is connected to the corresponding fixed plate (211), and the other end is connected to the corresponding locking pin (411).

4. The double three-way ball valve with adjustable valve distance according to claim 3, characterized in that: An operating portion (212) is provided in the middle of the bidirectional screw (21), an operating hole (213) is provided on the operating portion (212), the operating handle (3) passes through the operating hole (213), the locking pins (411) at both ends of the bidirectional screw (21) are connected to unlocking ropes (413), a guide hole (2111) is provided on the fixing plate (211), and a channel (214) is provided at both ends of the bidirectional screw (21), the channel (214) is communicated with the operating hole (213), and each unlocking rope (413) passes through the corresponding guide hole (2111) and the channel (214) in sequence and is connected to the operating handle (3).

5. The double three-way ball valve with adjustable valve distance according to claim 4, characterized in that: A limiting groove (2131) is provided on the wall of the operating hole (213) and is arranged along the circumference of the operating hole (213). The operating handle (3) is provided with a plurality of limiting blocks (31). The plurality of limiting blocks (31) are slidably arranged in the limiting groove (2131) so that the operating handle (3) can be rotatably installed in the operating hole (213).

6. The double three-way ball valve with adjustable valve distance according to claim 5, characterized in that: The side wall of the operating handle (3) is provided with a plurality of mounting grooves (32) along its circumference, which are arranged corresponding to the limit blocks (31). The limit blocks (31) are slidably fitted in the corresponding mounting grooves (32). One end of the operating handle (3) is provided with a mounting cavity (33). Each of the mounting grooves (32) is communicated with the mounting cavity (33). The end of the operating handle (3) close to the mounting cavity (33) is detachably equipped with a gripping end (34). The end of the gripping end (34) close to the mounting cavity (33) is provided with a follower rod (35). A guide wedge surface (311) is provided on a side of the limit block (31) close to the installation cavity (33), and the guide wedge surface (311) is arranged toward the gripping end (34); a bending portion (312) is provided on the side of the guide wedge surface (311) away from the gripping end (34) and facing away from the gripping end (34); a receiving groove (331) corresponding to the bending portion (312) is provided on the cavity wall of the installation cavity (33); and a second elastic member (332) is connected between the bending portion (312) and the groove wall of the receiving groove (331).

7. The double three-way ball valve with adjustable valve distance according to claim 1, characterized in that: The ball valve body (1) comprises a valve seat (11) and valve covers (12) arranged at both ends of the valve seat (11); the valve core of the ball valve body (1) is arranged in the valve seat (11); and the valve cover (12) is provided with a guide hole (121) for inserting a pipeline.

8. The double three-way ball valve with adjustable valve distance according to claim 7, characterized in that: The valve cover (12) is fixedly connected to the valve seat (11) via a flange (122), and one end of the valve cover (12) extends into a corresponding interface of the valve seat (11).

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