Ball valve butt joint structure

Abstract

The invention relates to the technical field of ball valves, and discloses a ball valve butt joint structure which comprises two ball valve assemblies in coaxial butt joint, each ball valve assembly comprises a valve body, a valve element and a valve rod, each valve element is movably arranged in the corresponding valve body, one end of each valve rod penetrates through the corresponding valve body and is fixedly connected with the corresponding valve element, and the other end of each valve rod extends out of the corresponding valve body and is sleeved with a gear. The butt joint end face of each valve body is provided with a rack extending in the circumferential direction, and the rack of one ball valve assembly can be meshed with the gear of the other ball valve assembly. A limiting pin is elastically connected into at least one valve body, a limiting hole matched with the limiting pin is formed in the butt joint face of at least another valve body, the limiting pin can move between a locking position and an unlocking position in the axial direction relative to the valve bodies, the limiting pin is inserted into the limiting hole in the locking position, and the limiting pin is disengaged from the limiting hole in the unlocking position. According to the ball valve butt joint structure, locking and opening of the two ball valve assemblies can be completed only through two actions, and operation is rapid and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball valves, in particular to a ball valve butt joint structure. BACKGROUND

[0002] In a water supply system, sometimes two ball valve assemblies need to be butt jointed for communication. In the prior art, four actions are needed to butt joint and assemble two ball valve assemblies: firstly, the joints of the two valve bodies are buckled, then the two valve bodies are locked by rotating, and then the handles on the two ball valve assemblies are turned to rotate the valve cores in the two valve bodies respectively to realize the communication of the liquid. Thus, the locking and opening of the two ball valve assemblies are completed by four actions in sequence, which is relatively complicated.

[0003] Therefore, there is an urgent need for a ball valve butt joint structure to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a ball valve butt joint structure which can complete the locking and opening of two ball valve assemblies by only two actions, thus being fast and convenient to operate.

[0005] The present application is implemented by the following technical solutions: The ball valve butt joint structure comprises two coaxially butt jointed ball valve assemblies, each of which comprises a valve body, a valve core and a valve rod, the valve core is movably arranged in the valve body, one end of the valve rod is provided through the valve body and fixedly connected with the valve core, the other end of the valve rod extends out of the valve body and is sleeved with a gear, and a gear rack extending in the circumferential direction is arranged on the butt joint end face of each valve body, wherein the gear rack of one ball valve assembly can be engaged with the gear of the other ball valve assembly. At least one limit pin is elastically connected in at least one valve body, and a limit hole matched with the limit pin is arranged on the butt joint face of at least one other valve body, and the limit pin can move along the axial direction between a locking position and an unlocking position, the limit pin is inserted into the limit hole in the locking position, and the limit pin is separated from the limit hole in the unlocking position.

[0006] As an optional solution, the limit pin is elastically connected in each of the two valve bodies, and the limit hole is arranged on the butt joint face of each of the two valve bodies, wherein the limit pin on one valve body can be inserted into and matched with the limit hole on the other valve body.

[0007] As an optional solution, a poking hole is arranged on the side wall of the valve body, a poking member is fixedly connected to the limit pin, the poking member is provided through the poking hole and partially extends out of the outer surface of the valve body, and the poking member can drive the limit pin to slide along the axial direction.

[0008] As an optional solution, the free end of the limiting pin is configured as a spherical surface.

[0009] As an optional solution, a guide hole with an open end is provided in the valve body, the guide hole extends along the axial direction of the valve body, and the limit pin is slidably disposed in the guide hole.

[0010] As an optional solution, a first elastic member is abutted between the bottom of the guide hole and the limiting pin.

[0011] As an optional solution, a flange is provided at one end of each valve body, and the flanges of the two ball valve assemblies are connected to each other. Each flange is provided with the rack and a rotating hole corresponding to the position of the gear and extending circumferentially. The rack on one of the flanges can pass through the rotating hole on the other flange and engage with the gear corresponding to the rotating hole.

[0012] As an optional solution, the rotating hole includes a first hole segment and a second hole segment that are connected to each other, the radial width of the first hole segment is greater than the radial width of the second hole segment, the rack includes a rack body and a connecting portion connected between the flange and the rack body, the radial thickness of the rack body is greater than the radial thickness of the connecting portion, the rack body is adapted to the first hole segment, and the connecting portion is adapted to the second hole segment.

[0013] As an optional solution, at least one of the flanges is provided with a locking pin, and at least another flange is provided with a sliding hole extending circumferentially and cooperating with the locking pin, the locking pin includes a large diameter portion and a small diameter portion coaxially connected, the small diameter portion is connected between the large diameter portion and the flange, the sliding hole includes a connected penetration section and a limiting section, the maximum radial width of the penetration section is greater than the radial width of the limiting section, the large diameter portion is adapted to the penetration section, and the small diameter portion is adapted to the limiting section.

[0014] As an optional solution, on the same flange, the rotating hole, the rack, the sliding hole and / or the locking pin are arranged at intervals along the circumference of the flange.

[0015] As an optional solution, a mounting platform is provided on the valve body, a mounting hole is provided on the mounting platform, a limiting top bead is provided in the mounting hole, a second elastic member is abutted between the limiting top bead and the bottom of the mounting hole, and a limiting groove is provided on the lower surface of the gear, and some of the limiting top beads can be selectively accommodated in the limiting groove.

[0016] As an optional scheme, the outer fixing sleeve of the valve rod is provided with a transmission member, the peripheral side of the transmission member is provided with an abutting block, the valve body is provided with a mounting platform, two limiting blocks are arranged on the mounting platform, and the two limiting blocks are located on the rotating path of the abutting block. When the valve core is fully opened, the abutting block can abut against one of the limiting blocks. When the valve core is fully closed, the abutting block can abut against the other limiting block.

[0017] As an optional scheme, the valve body is provided with an outer cover, and the outer cover covers the gear.

[0018] The beneficial effects of the present application are: The ball valve butt joint structure provided by the present application comprises two valve bodies, a valve core, a valve rod, a gear, a rack, a limiting pin, a limiting hole, a transmission member, an abutting block, a mounting platform, and two limiting blocks. When assembling two ball valve assemblies, the two valve bodies are first manually butted, so that the rack of the first ball valve assembly is engaged with the gear of the second ball valve assembly, and the rack of the second ball valve assembly is engaged with the gear of the first ball valve assembly. During the butt joint of the two valve bodies, the limiting pin on the first valve body is pushed into the valve body by the butt joint surface of the second valve body, and the limiting pin on the second valve body is pushed into the valve body by the butt joint surface of the first valve body. The limiting pin is in an unlocked state. Then, the two valve bodies are rotated in opposite directions. The valve body drives the rack thereon to rotate. The rack on the first valve body drives the gear on the second valve body to rotate. The rack on the second valve body drives the gear on the first valve body to rotate. Each gear drives the corresponding valve rod to rotate. Each valve rod drives the corresponding valve core to rotate. When the valve body is rotated in place, the valve core is fully opened, and each limiting pin is ejected and extends into the opposite limiting hole. At this time, the limiting pin is in a locked position, and the two valve bodies are circumferentially locked to prevent the ball valve assembly from being closed due to accidental touch during use. Therefore, the ball valve butt joint structure provided by the present application can simultaneously open the valve cores of two ball valve assemblies by only two actions of butt joint and rotation during assembly, and achieves circumferential locking of the two ball valve assemblies. Compared with the prior art, one step is achieved, and the operation is fast and convenient, saving time and effort. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly and easily illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. The following drawings described are some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without creating any creative labor.

[0020] Figure 1 is a structural schematic view of the ball valve butt joint structure provided by the embodiment of the present application; Figure 2 is an axial sectional view of the ball valve butt joint structure provided by the embodiment of the present application; Figure 3 is a structural schematic view of two ball valve assemblies provided by the embodiment of the present application when just being docked; Figure 4 is a structural schematic view of a single ball valve assembly provided by the embodiment of the present application when just being docked; Figure 5 is an axial sectional view of two ball valve assemblies provided by the embodiment of the present application when just being docked; Figure 6 is a structural schematic view of two ball valve assemblies provided by the embodiment of the present application when being rotationally locked; Figure 7 is a structural schematic view of a single ball valve assembly provided by the embodiment of the present application when being rotationally locked; Figure 8 is an axial sectional view of two ball valve assemblies provided by the embodiment of the present application when being rotationally locked; Figure 9 is an exploded view of a single ball valve assembly provided by the embodiment of the present application; Figure 10 is a radial sectional view of a single ball valve assembly provided by the embodiment of the present application; Figure 11 is a structural view of a single ball valve assembly provided by another optional embodiment of the present application.

[0021] In the drawings: 10, ball valve assembly; 1, valve body; 11, flange; 111, rotating hole; 1111, first hole section; 1112, second hole section; 112, sliding hole; 1121, passing section; 1122, limiting section; 12, mounting platform; 121, mounting hole; 122, limiting block; 13, limiting hole; 14, pushing hole; 15, guide hole; 16, outer cover; 2, valve core; 21, flow hole; 3, valve rod; 31, transmission member; 311, abutting block; 4, gear; 41, limiting groove; 5, rack; 51, rack body; 52, connecting part; 6, limiting pin; 61, spherical surface; 62, first elastic member; 7, pushing member; 8, locking pin; 81, large diameter part; 82, small diameter part; 9, limiting top bead; 91, second elastic member. DETAILED DESCRIPTION

[0022] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0023] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0026] The present embodiment provides a ball valve butt joint structure, as shown in Figure 1 and Figure 2 The ball valve butt joint structure comprises two coaxially butted and structurally identical ball valve assemblies 10, each of which comprises a valve body 1, a valve core 2, a valve stem 3 and a gear 4. The two valve bodies 1 are coaxially butted when assembled, and a sealing ring is embedded on the butt joint surface of the two valve bodies 1 to achieve sealing after butt joint and prevent liquid leakage. The valve core 2 is spherical and movably arranged in the valve body 1. One end of the valve stem 3 penetrates the valve body 1 and is fixedly connected with the valve core 2, and the other end of the valve stem 3 extends out of the valve body 1 and is sleeved with the gear 4, which can drive the valve stem 3 to rotate. The butt joint end surface of each valve body 1 is provided with a circumferentially extending rack 5, and the rack 5 of one ball valve assembly 10 can engage with the gear 4 of the other ball valve assembly 10.

[0027] Further, as shown in Figure 8As shown, the limiting pin 6 is elastically connected in each valve body 1, and the abutting surface of each valve body 1 is provided with a limiting hole 13, and the limiting pin 6 and the limiting hole 13 on the same valve body 1 are arranged adjacently, and the limiting pin 6 on one valve body 1 can be inserted into the limiting hole 13 on the other valve body 1, and specifically, the limiting pin 6 can move along the axial direction of the valve body 1 between a locking position and an unlocking position, and when in the locking position, the limiting pin 6 is inserted into the limiting hole 13, and when in the unlocking position, the limiting pin 6 is separated from the limiting hole 13.

[0028] As shown, Figure 2 the valve core 2 is provided with a flow hole 21 for communicating with the flow passage of the valve body 1, and when the axis of the flow hole 21 is perpendicular to the axis of the flow passage, the fluid can be cut off, and at this time, the ball valve assembly 10 is in a closed state, and by rotating the valve rod 3, the valve core 2 can be rotated, and the overlapping area of the flow hole 21 and the flow passage can be adjusted, so as to adjust the flow size, and when the axis of the flow hole 21 of the valve core 2 and the axis of the flow passage completely coincide, the fluid can be conducted, and the valve core 2 can be switched from 0° to 90°, so as to open the ball valve assembly 10.

[0029] In this embodiment, when the two ball valve assemblies 10 are not abutted, the valve core 2 is in a completely closed state, and the limiting pin 6 is in a pop-up state, that is, the abutting surface of the valve body 1 (see Figure 7 ), and when the two ball valve assemblies 10 are assembled, as shown in Figures 3 to 5 , the two valve bodies 1 are first abutted manually, so that the rack 5 of the first ball valve assembly 10 is engaged with the gear 4 of the second ball valve assembly 10, and at the same time, the rack 5 of the second ball valve assembly 10 is engaged with the gear 4 of the first ball valve assembly 10, and in the process of abutting the two valve bodies 1, the limiting pin 6 on the first valve body 1 is pushed into the valve body 1 by the abutting surface of the second valve body 1, and at the same time, the limiting pin 6 on the second valve body 1 is pushed into the valve body 1 by the abutting surface of the first valve body 1, and the limiting pin 6 is in an unlocked state, and then the two valve bodies 1 are rotated in the direction of the arrow in Figure 3 , and the valve body 1 will drive the rack 5 thereon to rotate, the rack 5 on the first valve body 1 will drive the gear 4 on the second valve body 1 to rotate, and the rack 5 on the second valve body 1 will drive the gear 4 on the first valve body 1 to rotate, and each gear 4 will drive the corresponding valve rod 3 to rotate, and each valve rod 3 will drive the corresponding valve core 2 to rotate; as shown in Figures 6 to 8 , when the valve body 1 is rotated to the position, the valve core 2 is completely opened, and at the same time, each limiting pin 6 will pop up and extend into the opposite limiting hole 13, and at this time, the limiting pin 6 is in a locking position, and the two valve bodies 1 are locked in the circumferential direction, so as to prevent the ball valve assembly 10 from being closed due to accidental touch during use.

[0030] Therefore, the ball valve butt joint structure provided by the embodiment can simultaneously open the valve cores 2 of the two ball valve assemblies 10 by only two actions of butt joint and rotation during assembly, and achieves the circumferential locking of the two ball valve assemblies 10, which saves two actions compared with the prior art, and is one-step, fast and convenient to operate, and saves time and effort.

[0031] In another optional embodiment, the limiting pin 6 can be elastically connected only in one valve body 1, and a limiting hole 13 can be formed in the butt joint surface of the other valve body 1, and the limiting pin 6 is inserted into the limiting hole 13 in a plug-fit manner, which also achieves the circumferential locking function as described above, and will not be described herein again.

[0032] In an optional embodiment, as shown in Figure 7 the free end of the limiting pin 6 is configured as a spherical surface 61. It can be understood that when the butt joint surface of the valve body 1 pushes the limiting pin 6 into the valve body 1, the limiting pin 6 always abuts against the butt joint surface of the valve body 1, and when the valve body 1 is rotated, the limiting pin 6 and the butt joint surface of the valve body 1 have a frictional force. By configuring the free end of the limiting pin 6 as a spherical surface 61, the limiting pin 6 and the butt joint surface of the valve body 1 are in point-surface contact, the contact area is reduced, the frictional force is reduced compared with surface-surface contact, the rotation of the valve body 1 is smoother, the wear of the limiting pin 6 is reduced, and the service life of the limiting pin 6 is prolonged.

[0033] In an optional embodiment, as shown in Figure 4 and Figure 5 an end-opened guide hole 15 is formed in each valve body 1, the guide hole 15 extends along the axial direction of the valve body 1, and the limiting pin 6 is slidingly arranged in the guide hole 15. The limiting pin 6 can slide relative to the guide hole 15 when it is ejected or pushed in, and the movement of the limiting pin 6 is guided by the cooperation between the limiting pin 6 and the guide hole 15, so that the movement of the limiting pin 6 is more stable.

[0034] As shown in Figure 5 the first elastic member 62 abuts between the hole bottom of the guide hole 15 and the limiting pin 6. In the embodiment, the first elastic member 62 can be a spring. Figure 5 When the limiting pin 6 is pushed in by the butt joint surface of the valve body 1, the first elastic member 62 is in a compressed state at this time, as shown in Figure 8 When the valve body 1 is rotated to the position where the limiting pin 6 faces the limiting hole 13, the first elastic member 62 rebounds and drives the limiting pin 6 to extend into the limiting hole 13, at this time, the limiting pin 6 is in a locked position, and the elastic force of the first elastic member 62 can stably insert the limiting pin 6 into the limiting hole 13 to circumferentially lock the valve body 1.

[0035] In the embodiment, as shown in Figure 3As shown, each valve body 1 has a toggle hole 14 on its side wall, and each limit pin 6 is fixedly connected to a toggle member 7, which is inserted into the toggle hole 14 and partially extends out of the outer surface of the valve body 1. The toggle member 7 can drive the limit pin 6 to slide axially. Figure 6 and Figure 8 As shown, after the two ball valve assemblies 10 are docked and locked, the limit pin 6 is inserted into the limit hole 13. At this time, the toggle member 7 and the end of the toggle hole 14 close to the docking surface abut against each other. When the two ball valve assemblies 10 need to be disassembled and closed, the operator uses his two thumbs to toggle the two toggle members 7 axially away from each other. The toggle members 7 drive the limit pin 6 to move. When the toggle member 7 and the end of the toggle hole 14 away from the docking surface abut against each other, as shown in FIG. Figure 4 As shown in the figure, the limit pin 6 is completely out of the limit hole 13, the limit pin 6 is in the unlocked state, and then Figure 3 Rotate the two valve bodies 1 in the direction opposite to the arrow in the figure, so that the rack 5 drives the gear 4 to rotate, and the gear 4 drives the valve core 2 to close through the valve stem 3. When the valve body 1 rotates into place, the valve core 2 is completely closed. At this time, the two ball valve assemblies 10 are pulled away from each other to separate the two ball valve assemblies 10. After separation, the limit pin 6 is ejected under the action of the first elastic member 62. In this way, the two ball valve assemblies 10 can be quickly disassembled, saving time and effort and improving the convenience of the disassembly operation.

[0036] In an optional embodiment, if Figure 4 As shown, a flange 11 is provided at one end of each valve body 1, and the outer diameter of the flange 11 is larger than the outer diameter of the valve body 1. The flanges 11 of the two ball valve assemblies 10 are connected to each other. Each flange 11 is provided with the above-mentioned rack 5 and a rotating hole 111 corresponding to the position of the gear 4 and extending in the circumferential direction. The rack 5 and the rotating hole 111 on the same flange 11 are arranged opposite to each other, and the rack 5 on one flange 11 can pass through the rotating hole 111 on the other flange 11 and engage with the gear 4 corresponding to the rotating hole 111, that is, the rack 5 on the first flange 11 can pass through the rotating hole 111 on the second flange 11 and engage with the gear 4 on the second valve body 1, and the rack 5 on the second flange 11 can pass through the rotating hole 111 on the first flange 11 and engage with the gear 4 on the first valve body 1. By positioning the rotating hole 111, it is convenient to achieve coaxial docking between the two ball valve assemblies 10, and the two ends of the rack 5 can respectively abut against the two end walls of the rotating hole 111, playing a certain limiting role, thereby being able to limit and indicate the rotation angle of the valve body 1.

[0037] Specifically, if Figure 4As shown, the rotating hole 111 includes a first hole segment 1111 and a second hole segment 1112 that are connected to each other. The radial width of the first hole segment 1111 is greater than the radial width of the second hole segment 1112. The rack 5 includes a rack body 51 and a connecting portion 52 connected between the flange 11 and the rack body 51. The radial thickness of the rack body 51 is greater than the radial thickness of the connecting portion 52. The rack body 51 is adapted to the first hole segment 1111, and the connecting portion 52 is adapted to the second hole segment 1112. When the two flanges 11 are connected, the rack body 51 first passes through the first hole section 1111 and meshes with the gear 4. At this time, the connecting portion 52 is also located in the first hole section 1111. Then, during the process of rotating the valve body 1, the connecting portion 52 gradually rotates into the second hole section 1112. When the valve body 1 rotates to the limit position, the connecting portion 52 abuts the end face of the second hole section 1112, forming a limit position. At this time, the valve core 2 is fully opened. Because the radial thickness of the rack body 51 is greater than the radial width of the second hole section 1112, the rack body 51 cannot escape from the second hole section 1112, thereby achieving axial limit locking after the two valve bodies 1 are connected, and the two cannot separate and loosen. This locking arrangement is simple in structure and does not require a separate locking structure, which avoids increasing the complexity of the structure. In addition, after the axial locking is achieved through the cooperation of the rack 5 and the rotating hole 111, the connecting surfaces of the two valve bodies 1 are tightly fitted, thereby ensuring the sealing reliability between the connecting surfaces of the two valve bodies 1.

[0038] Furthermore, if Figure 3 and Figure 4 As shown, both flanges 11 are provided with locking pins 8, and both flanges 11 are provided with sliding holes 112. The locking pin 8 and sliding hole 112 on the same flange 11 are arranged adjacent to each other, and the locking pin 8 on one flange 11 can cooperate with the sliding hole 112 on the other flange 11. The positioning of the sliding holes 112 facilitates coaxial docking between the two ball valve assemblies 10, and the locking pin 8 can respectively abut against the end walls of the sliding hole 112, which also plays a certain limiting role, thereby limiting and indicating the rotation angle of the valve body 1.

[0039] Specifically, the locking pin 8 includes a large diameter portion 81 and a small diameter portion 82 connected coaxially, the small diameter portion 82 is connected between the large diameter portion 81 and the flange 11, and the sliding hole 112 includes a connecting penetration section 1121 and a limiting section 1122. The penetration section 1121 is a circular hole, and the limiting section 1122 is an arc-shaped hole. The maximum radial width of the penetration section 1121 is greater than the radial width of the limiting section 1122. The large diameter portion 81 is adapted to the penetration section 1121, and the small diameter portion 82 is adapted to the limiting section 1122. Similar to the cooperation between the rack 5 and the rotating hole 111, as shown in FIG. Figure 3As shown, when the two flanges 11 are just connected, the large diameter portion 81 first passes through the penetration section 1121, and the small diameter portion 82 is located in the penetration section 1121. Then, during the process of rotating the valve body 1, the small diameter portion 82 gradually rotates into the limit section 1122. When the valve body 1 rotates to the limit position, as shown in FIG. Figure 6 As shown, the small-diameter portion 82 abuts against the end face of the limiting section 1122, forming a limit. At this time, the valve core 2 is fully open. Since the radial width of the large-diameter portion 81 is greater than the radial width of the limiting section 1122, the large-diameter portion 81 cannot escape from the limiting section 1122, thereby achieving further axial limit locking after the two valve bodies 1 are docked, and the two cannot separate, preventing loosening. In addition, after the axial locking is achieved through the cooperation of the locking pin 8 and the sliding hole 112, the docking surfaces of the two valve bodies 1 are tightly fitted, thereby further ensuring the sealing reliability between the docking surfaces of the two valve bodies 1.

[0040] In another optional embodiment, a locking pin 8 may be provided on only one of the flanges 11, and a sliding hole 112 may be provided on the other flange 11. The locking pin 8 cooperates with the relative sliding hole 112 to also achieve the above-mentioned axial locking function, which will not be repeated here.

[0041] Optionally, in this embodiment, if Figure 4 As shown, on the same flange 11, the rotating hole 111, the rack 5, the sliding hole 112, and the locking pin 8 are arranged at intervals along the circumference of the flange 11. This arrangement ensures that when the two valve bodies 1 are rotated and locked, the two flanges 11 are as tightly fitted as possible at all locations along the circumference, thereby improving the sealing reliability between the mating surfaces of the two valve bodies 1.

[0042] In an optional embodiment, if Figure 9 and Figure 10 As shown, the valve body 1 is provided with a mounting platform 12, and a mounting hole 121 is provided on the mounting platform 12. A limit bead 9 is provided in the mounting hole 121. A second elastic member 91 abuts between the limit bead 9 and the bottom of the mounting hole 121. A limit groove 41 is provided on the lower surface of the gear 4. The limit groove 41 is a groove smaller than a semicircle. Part of the limit bead 9 can be selectively accommodated in the limit groove 41. In this embodiment, the second elastic member 91 can be a spring. Figure 10As shown, when the two ball valve assemblies 10 are not docked, the valve core 2 is in the closed state, and the limiting bead 9 is lifted by the second elastic member 91. The upper half of the limiting bead 9 is located outside the mounting hole 121 and accommodated in the limiting groove 41 at the bottom of the gear 4, which provides a circumferential limit to the gear 4, preventing accidental opening of the ball valve assembly 10 and leakage. When the two ball valve assemblies 10 are docked, with a slight rotation of the valve, the gear 4, driven by the rack 5, easily overcomes the elastic force of the second elastic member 91 and rotates free of the restriction of the limiting bead 9. Therefore, the limiting bead 9 does not affect the rotation of the gear 4 when the two ball valve assemblies 10 are docked.

[0043] In an optional embodiment, the mounting hole 121, the limiting bead 9 and the second elastic member 91 can be configured as follows: Figure 10 In another optional embodiment, the mounting hole 121, the limiting bead 9, and the second elastic member 91 can also be provided in two symmetrically arranged groups, which can ensure that the gear 4 is evenly stressed and prevent the gear 4 from being deflected during rotation, thereby obstructing the transmission with the rack 5.

[0044] In an optional embodiment, if Figure 9 As shown, the valve stem 3 is fixedly sleeved with a transmission member 31, the gear 4 can be directly fixedly sleeved on the outside of the valve stem 3, or the gear 4 can be sleeved on the outside of the transmission member 31, and power transmission is achieved through the transmission member 31 and the valve stem 3. The transmission member 31 is convexly provided with an abutment block 311 on the circumferential side, and the valve body 1 is provided with a mounting platform 12. The mounting platform 12 is provided with two limit blocks 122. The two limit blocks 122 are both located on the rotation path of the abutment block 311, and the central angle between the sides of the two limit blocks 122 that are close to each other is 90°. When the valve core 2 is fully opened, the abutment block 311 can abut against one of the limit blocks 122. When the valve core 2 is fully closed, the abutment block 311 can abut against the other limit block 122. Therefore, through the above arrangement, the valve core 2 can be limited at the two positions of 0° and 90°, thereby ensuring the accuracy of closing and opening the valve core 2.

[0045] In an optional embodiment, if Figure 11 As shown, the valve body 1 is detachably provided with an outer cover 16, which covers the gear 4. The outer cover 16 can shield the gear 4, preventing the gear 4 from being exposed, thereby improving the aesthetics.

[0046] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Ball valve docking structure, characterized in that, It comprises two coaxially butted ball valve assemblies (10), each of the ball valve assemblies (10) comprising a valve body (1), a valve core (2) and a valve stem (3), the valve core (2) being movably arranged in the valve body (1), one end of the valve stem (3) passing through the valve body (1) and fixedly connected to the valve core (2), the other end of the valve stem (3) extending out of the valve body (1) and being fitted with a gear (4), a rack (5) extending in the circumferential direction being provided on the butted end face of each valve body (1), the rack (5) of one of the ball valve assemblies (10) being able to mesh with the gear (4) of the other ball valve assembly (10); At least one of the valve bodies (1) is elastically connected to a limit pin (6), and a limit hole (13) cooperating with the limit pin (6) is provided on a mating surface of at least another valve body (1). The limit pin (6) can move axially between a locked position and an unlocked position relative to the valve body (1). In the locked position, the limit pin (6) is inserted into the limit hole (13), and in the unlocked position, the limit pin (6) is disengaged from the limit hole (13).

2. The ball valve docking structure according to claim 1, characterized in that: The limiting pins (6) are elastically connected to the inside of the two valve bodies (1), and the limiting holes (13) are provided on the mating surfaces of the two valve bodies (1), wherein the limiting pin (6) on one of the valve bodies (1) can be plugged into and matched with the limiting hole (13) on the other valve body (1).

3. The ball valve docking structure according to claim 1 or 2, characterized in that: A toggle hole (14) is provided on the side wall of the valve body (1), and a toggle member (7) is fixedly connected to the limit pin (6). The toggle member (7) is passed through the toggle hole (14) and partially extends out of the outer surface of the valve body (1). The toggle member (7) can drive the limit pin (6) to slide axially.

4. The ball valve docking structure according to claim 1 or 2, characterized in that: The free end of the limiting pin (6) is configured as a spherical surface (61).

5. The ball valve docking structure according to claim 1 or 2, characterized in that: A guide hole (15) with an open end is provided in the valve body (1), the guide hole (15) extends along the axial direction of the valve body (1), and the limit pin (6) is slidably arranged in the guide hole (15).

6. The ball valve docking structure according to claim 5, characterized in that: A first elastic member (62) is in contact between the bottom of the guide hole (15) and the limiting pin (6).

7. The ball valve docking structure according to claim 1, characterized in that: A flange (11) is provided at one end of each valve body (1), and the flanges (11) of the two ball valve assemblies (10) are connected to each other. Each flange (11) is provided with the rack (5) and a rotating hole (111) corresponding to the position of the gear (4) and extending in the circumferential direction, wherein the rack (5) on one flange (11) can pass through the rotating hole (111) on the other flange (11) and mesh with the gear (4) corresponding to the rotating hole (111).

8. The ball valve docking structure according to claim 7, characterized in that: The rotating hole (111) includes a first hole section (1111) and a second hole section (1112) that are connected to each other. The radial width of the first hole section (1111) is greater than the radial width of the second hole section (1112). The rack (5) includes a rack body (51) and a connecting portion (52) connected between the flange (11) and the rack body (51). The radial thickness of the rack body (51) is greater than the radial thickness of the connecting portion (52). The rack body (51) is adapted to the first hole section (1111), and the connecting portion (52) is adapted to the second hole section (1112).

9. The ball valve docking structure according to claim 7, characterized in that: At least one of the flanges (11) is provided with a locking pin (8), and at least another of the flanges (11) is provided with a sliding hole (112) extending in the circumferential direction and cooperating with the locking pin (8). The locking pin (8) includes a large diameter portion (81) and a small diameter portion (82) coaxially connected, and the small diameter portion (82) is connected between the large diameter portion (81) and the flange (11). The sliding hole (112) includes a connected through-hole section (1121) and a limiting section (1122). The maximum radial width of the through-hole section (1121) is greater than the radial width of the limiting section (1122). The large diameter portion (81) is adapted to the through-hole section (1121), and the small diameter portion (82) is adapted to the limiting section (1122).

10. The ball valve docking structure according to claim 9, characterized in that: On the same flange (11), the rotating hole (111), the rack (5), the sliding hole (112) and / or the locking pin (8) are arranged at intervals along the circumference of the flange (11).

11. The ball valve docking structure according to claim 1, characterized in that: The valve body (1) is provided with a mounting platform (12), the mounting platform (12) is provided with a mounting hole (121), a limiting top bead (9) is provided in the mounting hole (121), a second elastic member (91) is abutted between the limiting top bead (9) and the bottom of the mounting hole (121), and a limiting groove (41) is provided on the lower surface of the gear (4), and part of the limiting top bead (9) can be selectively accommodated in the limiting groove (41).

12. The ball valve docking structure according to claim 1, characterized in that: The valve stem (3) is externally fixed with a transmission member (31), and a convex abutment block (311) is provided on the circumferential side of the transmission member (31). The valve body (1) is provided with a mounting platform (12), and two limit blocks (122) are provided on the mounting platform (12). Both limit blocks (122) are located on the rotation path of the abutment block (311). When the valve core (2) is fully opened, the abutment block (311) can abut against one of the limit blocks (122), and when the valve core (2) is fully closed, the abutment block (311) can abut against the other limit block (122).

13. The ball valve docking structure according to claim 1, characterized in that: An outer cover (16) is buckled onto the valve body (1), and the outer cover (16) covers the gear (4).

Images