A valve distance adjustable type double three-way ball valve

Abstract

The application relates to a double three-way ball valve with adjustable valve distance, belonging to the technical field of valves, which comprises two symmetrically arranged ball valve bodies and a connecting rod 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, the middle part of the connecting rod is provided with an operating handle, the connecting rod comprises a bidirectional screw rod and thread sleeves symmetrically engaged with the two ends of the bidirectional screw rod, the outer side of the thread sleeves is provided with a guide structure arranged along the axial direction of the thread sleeves, the operating handle is arranged in the middle part of the bidirectional screw rod, the thread sleeves are coaxially fixed with the valve rods of the corresponding ball valve bodies, and a locking mechanism is arranged between the bidirectional screw rod and the thread sleeves. The length of the connecting rod is adjusted, the length of the connecting rod is stabilized after the adjustment is completed through the locking mechanism, the stable adjustment of the valve distance between the two ball valve bodies is realized, and the deployment flexibility and the maintenance convenience under complex working conditions are improved; during the adjustment process, the operating handle is always located in the middle part of the connecting rod, and the two valves are uniformly stressed.

Description

Technical Field

[0001] This application relates to the field of valves, and more particularly to a double three-way ball valve with adjustable valve spacing. Background Technology

[0002] A three-way ball valve is a key control element that uses a rotating valve core to split, merge, or switch the flow direction of media in a pipeline. It boasts advantages such as low flow resistance and reliable sealing, and is widely used in industrial fields such as petrochemicals, pharmaceuticals, and heating systems. However, in complex operating conditions involving the synchronous control of multiple pipelines, a single three-way ball valve is insufficient to meet the requirements for coordinated control of multiple media. This has led to the development of a double three-way ball valve structure—that is, integrating two three-way ball valves through a mechanical linkage device to achieve synchronous opening and closing or flow direction switching functions.

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

[0004] To improve deployment flexibility and maintenance convenience under complex operating conditions, this application provides a double three-way ball valve with adjustable valve spacing.

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

[0006] A double three-way ball valve with adjustable valve spacing includes 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. An operating handle is provided in the middle of the connecting rod. The connecting rod includes a bidirectional screw and threaded sleeves symmetrically engaged at its two ends. The outer side of the threaded sleeve is provided with a guide structure arranged along its axial direction. The operating handle is located in the middle of the bidirectional screw. Each threaded sleeve is coaxially fixed with 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 cooperation structure of the bidirectional screw and the threaded sleeve, overcoming the poor installation adaptability problem caused by the fixed distance 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 on the outside of the threaded sleeve, the threaded sleeves on both sides of the bidirectional screw can be made to move synchronously in opposite directions or in opposite directions during adjustment, thereby ensuring that the operating handle is always located in the middle of the connecting rod, which facilitates the uniform force on the two ball valve bodies. The locking mechanism ensures that the two ball valve bodies maintain a stable distance after the distance adjustment is completed, avoiding the distance back 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 retractable along the radial direction of the bidirectional screw;

[0010] A snap-fit ​​groove extends axially along the inner wall of the threaded sleeve;

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

[0012] Once the adjustment is complete, the locking assembly extends out of the radial profile of the bidirectional screw and embeds itself in the snap-fit ​​groove.

[0013] By adopting the above technical solution, the locking component and the snap-fit ​​groove are used to cooperate. During the adjustment process, the locking component disengages from the snap-fit ​​groove, which facilitates the 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 component is embedded in the snap-fit ​​groove. Through mechanical interference, the axial displacement and relative rotation of the screw and the sleeve are restricted at the same time, ensuring the stability of the distance between valves.

[0014] Optionally, the locking assembly includes a locking pin and a first elastic element arranged radially from the inside to the outside along the bidirectional screw. The locking pin is slidably disposed at the end of the bidirectional screw along the radial direction. The two ends of the bidirectional screw are provided with fixing plates. One end of the first elastic element 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 adjusting the valve distance, the first elastic element is compressed, causing the locking pin to retract into the radial profile of the bidirectional screw, thereby unlocking the locking component and avoiding mechanical interference during the adjustment process. When the valve distance adjustment is completed and the locking pin rotates to the position opposite to the locking groove, the first elastic element is released, the first elastic element resets, and the locking pin springs into the locking groove. The locking pin and the locking groove achieve a locking engagement, thereby achieving relative locking between the threaded sleeve and the bidirectional screw.

[0016] Optionally, the bidirectional screw has an operating part in the middle, an operating hole on the operating part, an operating handle passing through the operating hole, locking pins at both ends of the bidirectional screw being connected to unlocking ropes, a guide hole on the fixing plate, and channels at both ends of the bidirectional screw communicating with the operating hole. Each unlocking rope passes through the corresponding guide hole and channel in sequence and is then connected to the operating handle.

[0017] By adopting the above technical solution, the operation process for switching between locked and unlocked states of the locking component is simplified: When unlocking the locking component, turning the operating handle at a certain angle allows the unlocking rope to wrap around the side wall of the operating handle. The unlocking rope pulls the locking pin, causing the locking pin to retract into the radial contour of the bidirectional screw. Simultaneously, the first elastic element compresses and stores energy, thus enabling one-handed operation to simultaneously release the locking components at both ends of the bidirectional screw. When restoring the locked state of the locking component, simply release the operating handle. At this time, the first elastic element releases energy, causing the locking pin and operating handle to reset, and the locking pin springs into the snap-fit ​​groove, facilitating the snap-fit ​​engagement between the locking pin and the snap-fit ​​groove, thereby achieving relative locking between the threaded sleeve and the bidirectional screw. In addition, the interconnected design of the operating hole and the channel ensures concealed wiring of the unlocking rope inside the screw, avoiding the risk of external entanglement, extending the service life of the unlocking rope, and ensuring the stability of the unlocking rope's unlocking. At the same time, the guide hole constrains and guides the path of the unlocking rope, ensuring uniform transmission of tension, preventing one-sided locking pin jamming, and ensuring smooth switching of the locking component between locked and unlocked states.

[0018] Optionally, the operating hole wall is provided with a limiting groove arranged circumferentially along the operating hole, and the operating handle is provided with a plurality of limiting blocks, which are slidably arranged in the limiting groove so that the operating handle is rotatably installed in the operating hole.

[0019] By adopting the above technical solution, the sliding cooperation between the limiting groove and the limiting block allows the operating handle to rotate only along its own axis, avoiding the axial displacement of the operating handle in the operating hole due to its own weight, which would then pull the unlocking rope and cause the locking component to fail.

[0020] Optionally, the side wall of the operating handle is provided with a mounting groove corresponding to the limiting block along its circumference. The limiting block is slidably fitted in the corresponding mounting groove. One end of the operating handle is provided with a mounting cavity. Each mounting groove communicates with the mounting cavity. A gripping end is detachably mounted on the end of the operating handle near the mounting cavity. A follower rod is provided on the end of the gripping end near the mounting cavity. Each limiting block is provided with a guide wedge surface on the side near the mounting cavity, and the guide wedge surface is set towards the gripping end. A bent portion is provided on the side of the guide wedge surface away from the gripping end and on the side facing away from the gripping end. A receiving groove corresponding to the bent portion is provided on the cavity wall of the mounting cavity. A second elastic element is connected between the bent portion and the groove wall of the receiving groove.

[0021] By adopting the above technical solution, the cooperation between the guide wedge and the follower rod enables the automatic radial extension and retraction of the limiting block: when the gripping end is installed, the follower rod is inserted into the mounting cavity, and through the setting of the guide wedge, the follower rod can squeeze the limiting block, forcing the limiting block to extend out of the mounting groove and be pushed into the limiting groove. At the same time, the second elastic element is compressed in the receiving groove, realizing the installation of the operating handle; when the gripping end is disassembled, the follower rod is pulled out of the mounting cavity, the second elastic element is reset, and the limiting block automatically retracts into the mounting groove, realizing the quick separation of the limiting block from the limiting groove, thereby facilitating the quick disassembly and assembly of the operating handle.

[0022] Optionally, the ball valve body includes a valve seat and valve covers located at both ends of the valve seat. The valve core of the ball valve body is located inside the valve seat, and the valve cover is provided with a guide hole for pipe insertion.

[0023] By adopting the above technical solution, when connecting to the pipeline, the valve cover contacts the pipeline before the valve core, preventing the pipeline end face from directly impacting the valve core and causing damage to the sealing surface. Furthermore, the guide hole on the valve cover forms a coaxial guide with the pipeline insertion end, facilitating the correction of pipeline misalignment. In addition, when one end of the valve seat is connected to the pipeline, the valve cover at the other end provides axial support for the valve core within the valve seat, preventing displacement or detachment of the valve core under pipeline connection pressure, thus ensuring smooth opening and closing of the ball valve body.

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

[0025] By adopting the above technical solutions, the structure of the valve cover extending into the valve seat interface increases the alignment accuracy during flange connection. The thickened valve cover facilitates the fitting and guidance between the side wall of the valve cover and the valve seat port, reducing the risk of off-center load during flange bolt pre-tightening and improving sealing reliability. As a physical isolation barrier between the valve core and the flange, the thickened valve cover prevents the valve core from making hard contact with the flange after being impacted by pipeline vibration, 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 helps to suppress interface deformation and leakage caused by pipeline thermal expansion and contraction.

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

[0027] 1. This application utilizes a combination structure of a bidirectional screw and a threaded sleeve to adjust the distance between two ball valve bodies, overcoming the poor installation adaptability problem caused by the fixed distance of traditional double ball valves. This improves deployment flexibility and maintenance convenience under complex working conditions. Through the external guide structure of the threaded sleeve, the external guide device, in conjunction with the guide structure, ensures that the threaded sleeves on both sides of the bidirectional screw move synchronously in opposite directions during adjustment, thus ensuring that the operating handle is always located in the middle of the connecting rod. The locking mechanism ensures that the two ball valves maintain a stable distance after adjustment, preventing distance retraction caused by external force or vibration, and guaranteeing the stable control capability of the double ball valve under complex working conditions.

[0028] 2. This application simplifies the operation process of switching between locking and unlocking states of the locking component: When it is necessary to unlock the locking component, the operating handle is turned at a certain angle, allowing the unlocking rope to be wrapped around the side wall of the operating handle. The unlocking rope pulls the locking pin, causing the locking pin to retract into the radial profile of the bidirectional screw. At the same time, the first elastic element is compressed and stored energy, thus enabling one-handed operation to simultaneously release the locking components at both ends of the bidirectional screw. When it is necessary to restore the locking state of the locking component, the operating handle is released. At this time, the first elastic element releases energy, causing the locking pin and the operating handle to reset, and the locking pin springs into the snap-fit ​​groove, facilitating the snap-fit ​​engagement between the locking pin and the snap-fit ​​groove, thereby achieving relative locking between the threaded sleeve and the bidirectional screw. Attached Figure Description

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

[0030] Figure 2 This is an exploded view showing the ball valve body in the embodiments of this application.

[0031] Figure 3 This is a cross-sectional view showing the ball valve body in the embodiments of this application.

[0032] Figure 4This is a schematic diagram illustrating the structure of the connecting rod in the embodiments of this application.

[0033] Figure 5 This is a cross-sectional view illustrating the connecting rod in the embodiments of this application.

[0034] Figure 6 This is a schematic diagram illustrating the structure of the locking component in the embodiments of this application.

[0035] Figure 7 yes Figure 5 A magnified view of a portion of point A in the middle.

[0036] Explanation of reference numerals in the attached drawings: 1. Ball valve body; 11. Valve seat; 12. Valve cover; 121. Guide hole; 122. Flange; 2. Connecting rod; 21. Double-acting 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. Receiving groove; 332. Second elastic element; 34. Grip end; 35. Follower rod; 4. Locking mechanism; 41. Locking assembly; 411. Locking pin; 412. First elastic element; 413. Unlocking rope; 42. Snap-fit ​​groove. Detailed Implementation

[0037] The following combination Figures 1-7 This application will be described in further detail below.

[0038] Example:

[0039] This application discloses a double three-way ball valve with adjustable valve spacing. (Refer to...) Figure 1 A double three-way ball valve with adjustable valve spacing includes two symmetrically arranged ball valve bodies 1 and a connecting rod 2 connecting the two. 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. After the double three-way ball valve is connected to the pipeline, turning the operating handle 3 will drive the connecting rod 2 to rotate. The rotation of the connecting rod 2 synchronously drives the valve stems of the two ball valve bodies 1 to rotate, thereby realizing the synchronous 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 valve covers 12 installed at both ends of the valve seat 11. The valve core of the ball valve body 1 is located inside the valve seat 11, and the valve cover 12 has a guide hole 121 for pipe insertion. When connecting to the pipe, the valve cover 12 contacts the pipe before the valve core, preventing the pipe end face from directly impacting 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 pipe insertion end, thereby facilitating the correction of pipe misalignment. In addition, when one end of the valve seat 11 is connected to the pipe, the valve cover 12 at the other end can provide axial support for the valve core inside the valve seat 11, preventing the valve core of the ball valve body 1 from shifting or falling off under the pipe connection pressure, and ensuring the smooth opening and closing of the ball valve body 1.

[0041] Reference Figure 2 and Figure 3 Each valve cover 12 is fixed to a flange 122 on its outer periphery. 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 into 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 alignment accuracy of the flange 122 during connection, facilitates the use of the side wall of the valve cover 12 to fit and guide the valve seat 11 port, reduces the risk of off-center load when the flange 122 bolts are pre-tightened, and improves the sealing reliability. In addition, the valve cover 12 is thickened in effect. As a physical isolation barrier between the valve core and the flange 122, the thickened valve cover 12 can prevent the valve core from making hard contact with the flange 122 after being impacted by pipeline vibration, avoiding crushing or deformation of the sealing surface. Furthermore, the thickened valve cover 12 helps to ensure the rigid support of the valve cover 12, enhances the bending strength of the valve seat 11 port, and helps to suppress interface deformation and leakage caused by pipeline thermal expansion and contraction.

[0042] Reference Figure 1 , Figure 4 and Figure 5 The connecting rod 2 includes a bidirectional screw 21 and threaded sleeves 22 symmetrically engaged at its two ends. 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 located 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] This double three-way ball valve achieves adjustment of the distance between the two ball valve bodies 1 through the cooperation structure of the bidirectional screw 21 and the threaded sleeve 22, overcoming the poor installation adaptability problem caused by the fixed distance 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 cooperates 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 protrusion structure that is compatible with the guide structure 221. In use, after unlocking the locking mechanism 4, manually rotate the operating handle 3, which in turn drives the bidirectional screw 21 to rotate. Then, the external guide device guides the threaded sleeves 22 on both sides, causing the threaded sleeves 22 on both sides of the bidirectional screw 21 to move synchronously in opposite directions or in opposite directions. This ensures that the operating handle 3 is always located in the middle of the connecting rod 2, which facilitates the even distribution of force on the two ball valve bodies 1. The locking mechanism 4 ensures that the two ball valves maintain a stable distance after the distance adjustment is completed, avoiding distance back due to 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 component 41 and a locking groove 42. Two sets of locking components 41 are symmetrically arranged at both ends of the bidirectional screw 21, and the locking components 41 are retractable radially along the bidirectional screw 21. The locking groove 42 is located inside the threaded sleeve 22 and extends axially along the threaded sleeve 22. When adjusting the valve distance, the locking component 41 retracts into the radial profile of the bidirectional screw 21; after adjustment, the locking component 41 extends out of the radial profile of the bidirectional screw 21 and embeds into the locking groove 42. Thus, by utilizing the cooperation between the locking component 41 and the locking groove 42, the locking component 41 disengages from the locking 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 the length adjustment of the connecting rod 2 is completed, the locking component 41 embeds into the locking groove 42, simultaneously limiting the axial displacement and relative rotation of the screw and sleeve through mechanical interference, ensuring the stability of the valve distance.

[0045] Reference Figure 5 and Figure 6The locking assembly 41 includes a locking pin 411 and a first elastic member 412 arranged radially from the inside to the outside along 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. Fixing plates 211 are fixed on both end faces 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 valve distance, the first elastic element 412 is compressed, causing the locking pin 411 to retract into the radial profile of the bidirectional screw 21, thus unlocking the locking assembly 41 and avoiding mechanical interference during the adjustment process. When the valve distance adjustment is completed and the locking pin 411 rotates to the position opposite to the snap-fit ​​groove 42, the first elastic element 412 is released, the first elastic element 412 resets, and the locking pin 411 springs into the snap-fit ​​groove 42. The locking pin 411 and the snap-fit ​​groove 42 achieve a snap-fit ​​engagement, thereby achieving relative locking between the threaded sleeve 22 and the bidirectional screw 21.

[0046] Reference Figure 4 , Figure 5 and Figure 6 An operating part 212 is fixed in the middle of the bidirectional screw 21. An operating hole 213 is provided through the upper and lower parts of the operating part 212, and 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 the unlocking ropes 413 near the corresponding first elastic members 412. A guide hole 2111 is provided on the fixing plate 211. Both ends of the bidirectional screw 21 are provided with channels 214 along their own axial direction, and the channels 214 are connected to the operating holes 213. Each unlocking rope 413 passes through the corresponding guide hole 2111 and channel 214 in sequence and is fixed to the side wall of the operating handle 3.

[0047] When it is necessary to unlock the locking component 41, the operating handle 3 is turned at a certain angle, which allows 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, which retracts into the radial contour of the bidirectional screw 21. At the same time, the first elastic element 412 is compressed and stored, thus enabling one-handed operation to simultaneously release the locking components 41 at both ends of the bidirectional screw 21. When it is necessary to restore the locked state of the locking component 41, the operating handle 3 is released. At this time, the first elastic element releases its energy, causing the locking pin 411 and the operating handle 3 to reset, and the locking pin 411 springs into the snap-fit ​​groove 42, which facilitates the snap-fit ​​engagement between the locking pin 411 and the snap-fit ​​groove 42, thereby achieving relative locking between the threaded sleeve 22 and the bidirectional screw 21. In addition, the connection design between the operating hole 213 and the channel 214 ensures that the unlocking rope 413 is concealed inside the screw, avoiding the risk of external entanglement, extending the service life of the unlocking rope 413, and ensuring the stability of the unlocking rope 413 in unlocking. At the same time, the guide hole 2111 constrains and guides the path of the unlocking rope 413, ensuring the uniform transmission of tension, avoiding jamming of the locking pin 411 on one side, and ensuring the smoothness of the locking component 41 when switching between locking and unlocking states.

[0048] Reference Figure 5 and Figure 7 The operating hole 213 has a limiting groove 2131 arranged circumferentially on its wall. The operating handle 3 has several limiting blocks 31 that can slide along the limiting groove 2131, allowing the operating handle 3 to be rotatably installed in the operating hole 213. The sliding engagement between the limiting groove 2131 and the limiting blocks 31 ensures that the operating handle 3 can only rotate along its own axis, preventing the operating handle 3 from undergoing axial displacement within the operating hole 213 due to its own weight, which could then pull the unlocking rope 413 and cause the unlocking component to fail to lock.

[0049] Reference Figure 5 and Figure 7The side wall of the operating handle 3 has a mounting groove 32 corresponding to the limiting block 31, which is slidably fitted into the corresponding mounting groove 32. One end of the operating handle 3 has a mounting cavity 33, and 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 near the mounting cavity 33. In this embodiment, the gripping end 34 is snap-fitted or threaded to the port of the mounting cavity 33. A follower rod 35 is fixed to one end of the gripping end 34 near the mounting cavity 33. Each limiting block 31 has a guide wedge surface 311 on the side near the mounting cavity 33, and the guide wedge surface 311 faces the gripping end 34. A bent portion 312 is fixed to 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 bent portion 312 is formed on the cavity wall of the mounting cavity 33. A second elastic element 332 is connected between the bent portion 312 and the groove wall of the receiving groove 331. In this embodiment, the second elastic element 332 is a compression spring.

[0050] After inserting the operating handle 3 into the operating hole 213, the grip end 34 is installed at the port of the mounting cavity 33. When the grip end 34 is installed, the follower rod 35 is inserted into the mounting cavity 33. Through the setting of the guide wedge surface 311, the follower rod 35 can squeeze the limiting block 31, forcing the limiting block 31 to extend out of the mounting groove 32 and be pushed into the limiting groove 2131. At the same time, the second elastic element 332 is compressed in the receiving groove 331, realizing the installation of the operating handle 3. When the grip end 34 is disassembled, the follower rod 35 is pulled out of the mounting cavity 33, the second elastic element 332 is reset, and the limiting block 31 automatically retracts into the mounting groove 32, realizing the quick separation of the limiting block 31 from the limiting groove 2131. Then the operating handle 3 can be pulled out from the operating hole 213, which facilitates the quick disassembly and assembly of the operating handle 3.

[0051] The implementation principle of the adjustable-distance double three-way ball valve in this application embodiment is as follows: the distance between the two ball valve bodies 1 can be adjusted through the cooperation structure of the bidirectional screw 21 and the threaded sleeve 22, overcoming the poor installation adaptability problem caused by the fixed distance 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 threaded sleeves 22 on both sides of the bidirectional screw 21 can be made to move synchronously in opposite directions or in opposite directions during adjustment, thereby ensuring that the operating handle 3 is always located in the middle of the connecting rod 2, which facilitates the uniform force on the two ball valve bodies 1. By utilizing the cooperation between the locking component 41 and the snap-fit ​​groove 42, the locking component 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 achieving length adjustment of the connecting rod 2. After the length adjustment of the connecting rod 2 is completed, the locking component 41 is embedded into the snap-fit ​​groove 42, and the axial displacement and relative rotation of the screw and the sleeve are simultaneously restricted through mechanical interference, ensuring the stability of the valve distance and guaranteeing the stable control capability of the double three-way ball valve under complex working conditions.

[0052] Furthermore, this double-acting three-way ball valve simplifies the operation process of switching between the locked and unlocked states of the locking component 41: When it is necessary to unlock the locking component 41, turning the operating handle 3 at a certain angle allows 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 element 412 is compressed and stored, thus enabling the locking components 41 at both ends of the bidirectional screw 21 to be unlocked simultaneously with one hand. When it is necessary to restore the locked state of the locking component 41, simply release the operating handle 3. At this time, the first elastic element releases energy, causing the locking pin 411 and the operating handle 3 to reset, and the locking pin 411 to spring into the snap-fit ​​groove 42, facilitating the snap-fit ​​engagement between the locking pin 411 and the snap-fit ​​groove 42, thereby achieving relative locking between the threaded sleeve 22 and the bidirectional screw 21.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double three-way ball valve with adjustable distance between valves, comprising two symmetrically arranged ball valve bodies (1) and a connecting rod (2) connecting the two, the two ends of the connecting rod (2) are respectively in driving connection with the valve stems of the two ball valve bodies (1), and the middle part of the connecting rod (2) is provided with an operating handle (3), characterized in that: The connecting rod (2) comprises a bidirectional screw rod (21) and threaded sleeves (22) symmetrically engaged at both ends of the bidirectional screw rod (21), the threaded sleeves (22) are provided with guide structures (221) arranged along the axial direction of the threaded sleeves (22), the operation handle (3) is arranged at the middle part of the bidirectional screw rod (21), each threaded sleeve (22) is coaxially fixed with a valve stem of a corresponding ball valve body (1), and the bidirectional screw rod (21) is provided with a locking mechanism (4) between the bidirectional screw rod (21) and the threaded sleeves (22). ​ The locking mechanism (4) comprises: locking assemblies (41) arranged at both ends of the bidirectional screw rod (21), the locking assemblies (41) are arranged in an extendable manner along the radial direction of the bidirectional screw rod (21); a clamping groove (42) extends axially along the inner wall of the threaded sleeve (22); when the distance between the valves is adjusted, the locking assemblies (41) are retracted into the radial profile of the bidirectional screw rod (21); and when the adjustment is completed, the locking assemblies (41) are extended out of the radial profile of the bidirectional screw rod (21) and embedded in the clamping groove (42). 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 rod (21), the locking pin (411) is arranged in a sliding manner along the radial direction of the bidirectional screw rod (21) at the end of the bidirectional screw rod (21), the two ends of the bidirectional screw rod (21) are provided with fixed plates (211), one end of the first elastic member (412) is connected with the corresponding fixed plate (211), and the other end of the first elastic member (412) is connected with the corresponding locking pin (411). The middle part of the bidirectional screw rod (21) is provided with an operation part (212), the operation part (212) is provided with an operation hole (213), the operation handle (3) penetrates through the operation hole (213), the locking pins (411) at both ends of the bidirectional screw rod (21) are connected with unlocking ropes (413), the fixed plates (211) are provided with guide holes (2111), both ends of the bidirectional screw rod (21) are provided with channels (214), the channels (214) are in communication with the operation hole (213), and each unlocking rope (413) is connected with the operation handle (3) after penetrating through the corresponding guide hole (2111) and the channel (214) in sequence.

2. The valve spacing adjustable type double triple ball valve according to claim 1, characterized in that: The hole wall of the operation hole (213) is provided with a limiting groove (2131) arranged in a circumferential direction of the operation hole (213), the operation handle (3) is provided with a plurality of limiting blocks (31), and the plurality of limiting blocks (31) are slidably arranged in the limiting groove (2131), so that the operation handle (3) is rotatably arranged in the operation hole (213).

3. The valve spacing adjustable type double triple ball valve according to claim 2, characterized in that: The side wall of the operation handle (3) is provided with a plurality of installation grooves (32) corresponding to the limiting blocks (31) along the circumference thereof, the limiting blocks (31) are slidingly fitted in the corresponding installation grooves (32), one end of the operation handle (3) is provided with an installation cavity (33), each installation groove (32) is communicated with the installation cavity (33), one end of the operation handle (3) close to the installation cavity (33) is detachably assembled with a holding end head (34), one end of the holding end head (34) close to the installation cavity (33) is provided with a follower rod (35), one side of each limiting block (31) close to the installation cavity (33) is provided with a guide wedge surface (311), the guide wedge surface (311) is arranged towards the holding end head (34), one end of the guide wedge surface (311) away from the holding end head (34) and one side thereof away from the holding end head (34) are provided with a bending part (312), the cavity wall of the installation cavity (33) is provided with a containing groove (331) corresponding to the bending part (312), the second elastic member (332) is connected between the bending part (312) and the groove wall of the containing groove (331).

4. The valve spacing adjustable type double triple ball valve 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), a 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 connecting hole (121) for inserting a pipeline.

5. The valve spacing adjustable type double triple ball valve according to claim 4, characterized in that: The valve cover (12) is fixedly connected with the valve seat (11) through a flange (122), and one end of the valve cover (12) extends into the corresponding interface of the valve seat (11).

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