Ball valve butt joint structure

Abstract

The application relates to the technical field of ball valves and discloses a ball valve butt joint structure which comprises two coaxially butted ball valve assemblies, each ball valve assembly 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 arranged 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, a circumferentially-extended gear rack is arranged on the butt joint end face of each valve body, 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 the valve body, a limit hole matched with the limit pin is arranged on the butt joint face of at least one other valve body, the limit pin can move along the axis between a locking position and an unlocking position relative to the valve body, when the limit pin is in the locking position, the limit pin is inserted into the limit hole, and when the limit pin is in the unlocking position, the limit pin is separated from the limit hole. The ball valve butt joint structure provided by the application can complete the locking and opening of the two ball valve assemblies through only two actions, and the operation is quick 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, and is fast and convenient to operate.

[0005] The present application is implemented by the following technical solutions:

[0006] 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.

[0007] 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.

[0008] 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, and the limit pin on one valve body can be inserted into and matched with the limit hole on the other valve body.

[0009] 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.

[0010] As an optional solution, the free end of the limiting pin is configured as a spherical surface.

[0011] As an optional solution, a guiding hole with one end opening is formed in the valve body, the guiding hole extends along the axial direction of the valve body, and the limiting pin is slidingly arranged in the guiding hole.

[0012] As an optional solution, a first elastic member is arranged between the bottom of the guiding hole and the limiting pin.

[0013] As an optional solution, one end of each valve body is provided with a flange, the flanges of the two ball valve assemblies are connected, each flange is provided with the rack and a rotating hole corresponding to the gear and extending in the circumferential direction, and the rack on one flange can pass through the rotating hole on the other flange and engage with the gear corresponding to the rotating hole.

[0014] As an optional solution, the rotating hole comprises a first hole section and a second hole section connected to each other, the radial width of the first hole section is greater than the radial width of the second hole section, the rack comprises 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 matched with the first hole section, and the connecting portion is matched with the second hole section.

[0015] As an optional solution, at least one flange is provided with a locking pin, at least another flange is provided with a sliding hole extending in the circumferential direction and matched with the locking pin, the locking pin comprises a large-diameter portion and a small-diameter portion connected coaxially, the small-diameter portion is connected between the large-diameter portion and the flange, the sliding hole comprises a passing section and a limiting section connected to each other, the maximum radial width of the passing section is greater than the radial width of the limiting section, the large-diameter portion is matched with the passing section, and the small-diameter portion is matched with the limiting section.

[0016] As an optional solution, the rotating hole, the rack, and the sliding hole and / or the locking pin are arranged at intervals in the circumferential direction of the same flange.

[0017] As an optional solution, the valve body is provided with a mounting platform, the mounting platform is provided with a mounting hole, the mounting hole is provided with a limiting top bead, a second elastic member is arranged between the limiting top bead and the bottom of the mounting hole, the lower surface of the gear is provided with a limiting groove, and part of the limiting top beads can be selectively accommodated in the limiting groove.

[0018] As an optional scheme, a transmission member is arranged on the outer fixing sleeve of the valve rod, and a contact block is arranged on the circumferential side of the transmission member, an installation platform is arranged on the valve body, and two limiting blocks are arranged on the installation platform and located on the rotating path of the contact block, the contact block can abut against one of the limiting blocks when the valve core is fully opened, and the contact block can abut against the other limiting block when the valve core is fully closed.

[0019] As an optional scheme, an outer cover is arranged on the valve body and covers the gear.

[0020] The ball valve butt joint structure has the following beneficial effects:

[0021] The ball valve butt joint structure has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more obviously and clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the embodiments or the prior art description will be briefly introduced as follows, and the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not paying the drawings.

[0023] Figure 1 is a structural schematic diagram of the ball valve butt joint structure provided by the embodiments of the present application;

[0024] Figure 2is the axial sectional view of the ball valve butt joint structure provided by the embodiment of the present application;

[0025] Figure 3 is the structural schematic view of the two ball valve assemblies when just butt jointed provided by the embodiment of the present application;

[0026] Figure 4 is the structural schematic view of the single ball valve assembly when just butt jointed provided by the embodiment of the present application;

[0027] Figure 5 is the axial sectional view of the two ball valve assemblies when just butt jointed provided by the embodiment of the present application;

[0028] Figure 6 is the structural schematic view of the two ball valve assemblies when rotated and locked provided by the embodiment of the present application;

[0029] Figure 7 is the structural schematic view of the single ball valve assembly when rotated and locked provided by the embodiment of the present application;

[0030] Figure 8 is the axial sectional view of the two ball valve assemblies when rotated and locked provided by the embodiment of the present application;

[0031] Figure 9 is the exploded view of the single ball valve assembly provided by the embodiment of the present application;

[0032] Figure 10 is the radial sectional view of the single ball valve assembly provided by the embodiment of the present application;

[0033] Figure 11 is the structural view of the single ball valve assembly provided by another optional embodiment of the present application.

[0034] In the figure:

[0035] 10, ball valve assembly;

[0036] 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;

[0037] 2, valve core; 21, flow hole; 3, valve rod; 31, transmission part; 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 part; 7, pushing part; 8, locking pin; 81, large diameter part; 82, small diameter part; 9, limiting top bead; 91, second elastic part. DETAILED DESCRIPTION

[0038] The application will be further described below in connection with the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting on the application. In addition, it should be noted that in the drawings, only the parts related to the application are shown and not all the parts.

[0039] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or 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 application can be understood according to the specific circumstances.

[0040] 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.

[0041] 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 specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] The present embodiment provides a ball valve butt joint structure, such as Figure 1 and Figure 2As shown, the ball valve butt joint structure includes two coaxially butted and structurally identical ball valve assemblies 10, each of which includes a valve body 1, a valve core 2, a valve rod 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, preventing liquid leakage, the valve core 2 is spherical and movably arranged in the valve body 1, one end of the valve rod 3 penetrates the valve body 1 and is fixedly connected with the valve core 2, the other end of the valve rod 3 extends out of the valve body 1 and is sleeved with the gear 4, the gear 4 can drive the valve rod 3 to rotate, and a circumferentially extending rack 5 is arranged on the butt joint surface of each valve body 1, and the rack 5 of one of the ball valve assemblies 10 can be engaged with the gear 4 of the other ball valve assembly 10.

[0043] Further, as shown in the Figure 8 two valve bodies 1 are elastically connected with a limiting pin 6, the butt joint surface of the two valve bodies 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 adjacently arranged, the limiting pin 6 on one of the valve bodies 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, 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.

[0044] As shown in the Figure 2 valve core 2 is provided with a flow hole 21 for communicating with the flow passage of the valve body 1, when the axis of the flow hole 21 is perpendicular to the axis of the flow passage, the fluid can be cut off, at this time, the ball valve assembly 10 is in a closed state, by rotating the valve rod 3, the valve core 2 can be rotated, the overlapping area of the flow hole 21 and the flow passage can be adjusted, thereby adjusting the flow size, when the axis of the flow hole 21 of the valve core 2 and the axis of the flow passage are completely overlapped, the fluid can be conducted, the valve core 2 can be switched from 0° to 90°, thereby opening the ball valve assembly 10.

[0045] In this embodiment, when the two ball valve assemblies 10 are not butted, the valve cores 2 are in a completely closed state, and the limiting pins 6 are in a popped-out state, i.e., the limiting pins 6 pop out of the butt joint surface of the valve body 1 (see Figure 7 ), when assembling the two ball valve assemblies 10, as shown in the Figures 3 to 5 , first manually butt joint the two valve bodies 1, 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, in the process of butt joint of the two valve bodies 1, the limiting pin 6 on the first valve body 1 is pushed into the valve body 1 by the butt joint 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 butt joint surface of the first valve body 1, the limiting pin 6 is in an unlocked state, and then along Figure 3The arrow direction in the figure rotates the two valve bodies 1, which will drive the gear racks 5 on the valve bodies 1 to rotate, the gear rack 5 on the first valve body 1 will drive the gear wheel 4 on the second valve body 1 to rotate, the gear rack 5 on the second valve body 1 will drive the gear wheel 4 on the first valve body 1 to rotate, each gear wheel 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 each limiting pin 6 will pop out and extend into the opposite limiting hole 13, at this time, the limiting pin 6 is in the locking position, and the two valve bodies 1 are circumferentially locked to prevent the ball valve assembly 10 from being closed due to accidental touch during use.

[0046] Therefore, the ball valve butt joint structure provided in 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 circumferential locking of the two ball valve assemblies 10, which saves two actions compared with the prior art, is one-step, and is fast and convenient to operate, thereby saving time and effort.

[0047] In another optional embodiment, the limiting pin 6 can be elastically connected only in one of the valve bodies 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 opposite limiting hole 13 in a plug-fit manner, which also can achieve the above-mentioned circumferential locking function, and will not be described herein again.

[0048] 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 there is a friction force between the limiting pin 6 and the butt joint surface of the valve body 1 when the valve body 1 is rotated. 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 friction 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.

[0049] In an optional embodiment, as shown in Figure 4 and Figure 5 Each valve body 1 is provided with a guiding hole 15 with one end open, the guiding hole 15 extends along the axial direction of the valve body 1, and the limiting pin 6 is slidingly arranged in the guiding hole 15. The limiting pin 6 can slide relative to the guiding hole 15 when it is popped out or pushed in, and the movement of the limiting pin 6 is guided by the cooperation between the limiting pin 6 and the guiding hole 15, so that the movement of the limiting pin 6 is more stable.

[0050] As shown in Figure 5 The first elastic member 62 abuts between the hole bottom of the guiding hole 15 and the limiting pin 6. In the embodiment, the first elastic member 62 can be a spring. In combination withFigure 5 When the limiting pin 6 is pushed by the butt joint surface of the valve body 1, the first elastic member 62 is in a compressed state, as shown in Figure 8 When the valve body 1 is rotated to the position where the limiting pin 6 is opposite to 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 lock the valve body 1 in the circumferential direction.

[0051] In this embodiment, as shown in Figure 3 A poking hole 14 is formed in the side wall of each valve body 1, and a poking member 7 is fixedly connected to each limiting pin 6, the poking member 7 penetrates the poking hole 14 and partially extends out of the outer surface of the valve body 1, and the poking member 7 can drive the limiting pin 6 to slide in the axial direction. As shown in Figure 6 and Figure 8 When the two ball valve assemblies 10 are butted and locked, the limiting pin 6 is inserted into the limiting hole 13, and at this time the poking member 7 abuts against one end of the poking hole 14 which is close to the butt joint surface. When it is needed to disassemble and close the two ball valve assemblies 10, the operator pokes the two poking members 7 in the axial direction away from each other with the two thumbs, and the poking member 7 drives the limiting pin 6 to move, when the poking member 7 abuts against the other end of the poking hole 14 which is away from the butt joint surface, as shown in the position, Figure 4 At this time, the limiting pin 6 is completely separated from the limiting hole 13, and the limiting pin 6 is in an unlocked state, and then the two valve bodies 1 are rotated in the direction opposite to the arrow, Figure 3 so that the rack 5 drives the gear 4 to rotate, the gear 4 drives the valve core 2 to close through the valve stem 3, and when the valve body 1 is rotated to the position, the valve core 2 is completely closed, at this time the two ball valve assemblies 10 are pulled away from each other, so that the two ball valve assemblies 10 can be separated, and after the separation, the limiting pin 6 is ejected under the action of the first elastic member 62. Thus, the two ball valve assemblies 10 can be quickly disassembled, time and labor are saved, and the convenience of disassembly operation is improved.

[0052] In an optional embodiment, as shown in Figure 4As shown, one end of each valve body 1 is provided with a flange 11, 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 in abutment, each flange 11 is provided with the above-mentioned rack 5 and a rotating hole 111 extending in the circumferential direction and corresponding to the position of the gear 4, the rack 5 and the rotating hole 111 on the same flange 11 are oppositely arranged, 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. Through the positioning of the rotating hole 111, coaxial abutment between the two ball valve assemblies 10 is facilitated, and the two ends of the rack 5 can abut against the hole wall at the two ends of the rotating hole 111, thereby playing a certain limiting role, so that the rotation angle of the valve body 1 can be limited and indicated.

[0053] Specifically, as shown in the drawings, Figure 4 The rotating hole 111 includes a first hole section 1111 and a second hole section 1112 in communication, 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. When the two flanges 11 are in abutment, the rack body 51 first passes through the first hole section 1111 and engages with the gear 4, at this time the connecting portion 52 is also located in the first hole section 1111, then during the rotation of the valve body 1, the connecting portion 52 gradually rotates into the second hole section 1112, when the valve body 1 is rotated to the limit position, the connecting portion 52 abuts against the end face of the second hole section 1112, forming a limit, at this time the valve core 2 is completely opened, since 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 be taken out of the second hole section 1112, thereby realizing axial limiting locking after the abutment of the two valve bodies 1, the two valve bodies 1 cannot be separated, preventing loosening, this locking structure is simple, without the need to set a separate locking structure, avoiding increasing the complexity of the structure. In addition, after the axial locking is realized by the cooperation of the rack 5 and the rotating hole 111, the abutment faces of the two valve bodies 1 are tightly fitted, thereby ensuring the sealing reliability between the abutment faces of the two valve bodies 1.

[0054] Further, as shown in the drawings, Figure 3 and Figure 4As shown, the two flanges 11 are provided with locking pins 8, and the two flanges 11 are provided with sliding holes 112, the locking pin 8 and the sliding hole 112 on the same flange 11 are adjacent, and the locking pin 8 on one flange 11 can cooperate with the sliding hole 112 on the other flange 11. Through the positioning of the sliding hole 112, coaxial butt joint between the two ball valve assemblies 10 is facilitated, and the locking pin 8 can abut the hole wall at both ends of the sliding hole 112, and can also play a certain limiting role, so as to limit and indicate the rotation angle of the valve body 1.

[0055] Specifically, the locking pin 8 includes a large-diameter part 81 and a small-diameter part 82 connected coaxially, the small-diameter part 82 is connected between the large-diameter part 81 and the flange 11, the sliding hole 112 includes a penetrating segment 1121 and a limiting segment 1122 connected in communication, the penetrating segment 1121 is a circular hole, the limiting segment 1122 is an arc-shaped hole, the maximum radial width of the penetrating segment 1121 is greater than the radial width of the limiting segment 1122, the large-diameter part 81 is adapted to the penetrating segment 1121, and the small-diameter part 82 is adapted to the limiting segment 1122. Similar to the cooperation of the rack 5 and the rotating hole 111, as shown in Figure 3 When the two flanges 11 are just butt joint, the large-diameter part 81 penetrates the penetrating segment 1121 first, and the small-diameter part 82 is located in the penetrating segment 1121, then in the process of rotating the valve body 1, the small-diameter part 82 gradually rotates into the limiting segment 1122, when the valve body 1 rotates to the limit position, as shown in Figure 6 The small-diameter part 82 abuts the end face of the limiting segment 1122, limiting is formed, at this time the spool 2 is completely opened, since the radial width of the large-diameter part 81 is greater than the radial width of the limiting segment 1122, the large-diameter part 81 cannot be taken out of the limiting segment 1122, thereby realizing further axial limiting and locking after the butt joint of the two valve bodies 1, the two valve bodies 1 cannot be separated, and loosening is prevented. In addition, after the axial locking is realized through the cooperation of the locking pin 8 and the sliding hole 112, the butt joint surfaces of the two valve bodies 1 are tightly fitted, thereby further ensuring the sealing reliability between the butt joint surfaces of the two valve bodies 1.

[0056] In another optional embodiment, the locking pin 8 can also be arranged on only one of the flanges 11, and the sliding hole 112 is arranged on the other flange 11, and the locking pin 8 cooperates with the opposite sliding hole 112, and the axial locking function described above can also be realized, which will not be described herein.

[0057] Optionally, in the embodiment, as shown in Figure 4 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 in the circumferential direction of the flange 11. In this way, after the two valve bodies 1 are rotated and locked, the two flanges 11 are tightly fitted at each position in the circumferential direction, thereby improving the sealing reliability between the butt joint surfaces of the two valve bodies 1.

[0058] In an optional embodiment, as shown in Figure 9 and Figure 10 shown, the valve body 1 is provided with a mounting platform 12, the mounting platform 12 is provided with a mounting hole 121, the mounting hole 121 is provided with a limiting top bead 9, the limiting top bead 9 and the bottom of the mounting hole 121 abut the second elastic element 91, the lower surface of the gear 4 is provided with a limiting groove 41, the limiting groove 41 is a semicircular groove, and part of the limiting top bead 9 can be selectively accommodated in the limiting groove 41. In this embodiment, the second elastic element 91 can be a spring. As shown in Figure 10 , when the two ball valve assemblies 10 are not connected, the valve core 2 is in a closed state, and at the same time, the limiting top bead 9 is lifted by the second elastic element 91, the upper half of the limiting top bead 9 is located outside the mounting hole 121 and accommodated in the limiting groove 41 at the bottom of the gear 4, which produces a circumferential limiting effect on the gear 4, preventing the ball valve assembly 10 from being opened by mistake and causing liquid leakage. When the two ball valve assemblies 10 are connected, as long as the valve is slightly rotated, the gear 4 can easily overcome the elastic force of the second elastic element 91 and break away from the limitation of the limiting top bead 9 to rotate under the drive of the rack 5, so the limiting top bead 9 does not affect the rotation of the gear 4 when the two ball valve assemblies 10 are connected.

[0059] In an optional embodiment, the mounting hole 121, the limiting top bead 9 and the second elastic element 91 can be arranged as a group as shown in Figure 10 . In another optional embodiment, the mounting hole 121, the limiting top bead 9 and the second elastic element 91 can also be arranged in two symmetrical groups, which can ensure that the gear 4 is evenly stressed and prevent the gear 4 from being skewed during rotation and causing transmission with the rack 5 to be blocked.

[0060] In an optional embodiment, as shown in Figure 9 , the valve stem 3 is fixedly sleeved with a transmission member 31, the gear 4 can be directly fixedly sleeved outside the valve stem 3, or the gear 4 can be sleeved outside the transmission member 31, and the power transmission is realized through the transmission member 31 and the valve stem 3, the transmission member 31 is provided with an abutting block 311 on the circumferential side, the valve body 1 is provided with a mounting platform 12, the mounting platform 12 is provided with two limiting blocks 122, both of which are located on the rotation path of the abutting block 311, and the central angle between the side surfaces of the two limiting blocks 122 close to each other is 90°, when the valve core 2 is completely opened, the abutting block 311 can abut against one of the limiting blocks 122, and when the valve core 2 is completely closed, the abutting block 311 can abut against the other limiting block 122. Therefore, through the above arrangement, the valve core 2 can be limited at two positions of 0° and 90°, thereby ensuring the accuracy of the closing and opening of the valve core 2.

[0061] In an optional embodiment, as shown in Figure 11As shown, the valve body 1 is detachably buckled with an outer cover 16, and the outer cover 16 covers the gear 4. The outer cover 16 can shield the gear 4, prevent the gear 4 from being exposed, and improve the aesthetic appearance.

[0062] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A ball valve docking structure, characterized in that, The device includes two coaxially connected ball valve assemblies (10). Each ball valve assembly (10) includes a valve body (1), a valve core (2), and a valve stem (3). The valve core (2) is movably disposed inside the valve body (1). One end of the valve stem (3) passes through the valve body (1) and is fixedly connected to the valve core (2). The other end of the valve stem (3) extends out of the valve body (1) and is fitted with a gear (4). Each valve body (1) has a rack (5) extending circumferentially on its mating end face. The rack (5) of one ball valve assembly (10) can 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 limiting pin (6), and at least one other valve body (1) has a limiting hole (13) on its mating surface that cooperates with the limiting pin (6). The limiting pin (6) can move axially between a locked position and an unlocked position relative to the valve body (1). In the locked position, the limiting pin (6) is inserted into the limiting hole (13), and in the unlocked position, the limiting pin (6) is disengaged from the limiting hole (13). Each valve body (1) is provided with a flange (11) at one end. The flanges (11) of the two ball valve assemblies (10) are connected to each other. Each flange (11) is provided with a rack (5) and a rotating hole (111) that corresponds to the position of the gear (4) and extends circumferentially. 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). At least one of the flanges (11) is provided with a locking pin (8), and at least another flange (11) is provided with a circumferentially extending sliding hole (112) that mates with the locking pin (8). The locking pin (8) includes a large-diameter portion (81) and a small-diameter portion (82) coaxially connected. The small-diameter portion (82) is connected between the large-diameter portion (81) and the flange (11). The sliding hole (112) includes a through section (1121) and a limiting section (1122) that are connected. The maximum radial width of the through section (1121) is greater than the radial width of the limiting section (1122). The large-diameter portion (81) is adapted to the through section (1121), and the small-diameter portion (82) is adapted to the limiting section (1122). On the same flange (11), the rotating hole (111), the rack (5), the sliding hole (112), and / or the locking pin (8) are arranged circumferentially on the flange (11).

2. The ball valve docking structure according to claim 1, characterized in that, The two valve bodies (1) are elastically connected with the limiting pin (6), and the mating surfaces of the two valve bodies (1) are provided with the limiting hole (13). The limiting pin (6) on one valve body (1) can be inserted and engaged 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, The valve body (1) has a toggle hole (14) on its side wall. A toggle member (7) is fixedly connected to the limiting pin (6). The toggle member (7) passes through the toggle hole (14) and extends partially out of the outer surface of the valve body (1). The toggle member (7) can drive the limiting 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 constructed as a spherical surface (61).

5. The ball valve docking structure according to claim 1 or 2, characterized in that, The valve body (1) has a guide hole (15) with one end open. The guide hole (15) extends along the axial direction of the valve body (1). The limiting pin (6) is slidably disposed in the guide hole (15).

6. The ball valve docking structure according to claim 5, characterized in that, The bottom of the guide hole (15) abuts against the limiting pin (6) with a first elastic element (62).

7. The ball valve docking structure according to claim 1, characterized in that, The rotating hole (111) includes a first hole segment (1111) and a second hole segment (1112) that are connected. 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 part (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 part (52). The rack body (51) is adapted to the first hole segment (1111), and the connecting part (52) is adapted to the second hole segment (1112).

8. The ball valve docking structure according to claim 1, characterized in that, The valve body (1) is provided with an installation platform (12), and the installation platform (12) is provided with an installation hole (121). A limiting ball (9) is provided in the installation hole (121). A second elastic element (91) abuts against the bottom of the installation hole (121). A limiting groove (41) is provided on the lower surface of the gear (4), and some of the limiting balls (9) can be selectively accommodated in the limiting groove (41).

9. The ball valve docking structure according to claim 1, characterized in that, The valve stem (3) is externally fixed with a transmission component (31), and the transmission component (31) has a protruding abutment block (311) on its periphery. The valve body (1) is provided with an installation platform (12), and the installation platform (12) is provided with two limit blocks (122). Both limit blocks (122) are located on the rotation path of the abutment block (311). When the valve core (2) is fully open, 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).

10. The ball valve docking structure according to claim 1, characterized in that, The valve body (1) is fitted with an outer cover (16), which covers the gear (4).

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