Ball valve butt-joint structure
Provided is a ball valve butt-joint structure including two ball valve assemblies which are coaxially butt-jointed and have the same structure. Each ball valve assembly includes a valve body, a valve core, a valve stem, and a gear. The valve core is disposed within the valve body. One end of the valve stem is disposed to pass through the valve body and is fixedly connected to the valve core, and another end of the valve stem extends out of the valve body and is sleeved with the gear. The gear drives the valve stem to rotate. A butt-joint end surface of each valve body is provided with a rack extending circumferentially. The rack of one ball valve assembly is configured to mesh with the gear of another ball valve assembly.
1 . A ball valve butt-joint structure, comprising two ball valve assemblies which are coaxially butt-jointed and have the same structure, wherein each of the two ball valve assemblies comprises a valve body, a valve core, a valve stem and a gear, the valve core is disposed within the valve body, one end of the valve stem is disposed to pass through the valve body and is fixedly connected to the valve core, another end of the valve stem extends out of the valve body and is sleeved with the gear, the gear is configured to drive the valve stem to rotate, a butt-joint end surface of each valve body is provided with a rack extending circumferentially, and the rack of one ball valve assembly of the two ball valve assemblies is configured to mesh with the gear of another ball valve assembly of the two ball valve assemblies.
2 . The ball valve butt-joint structure of claim 1 , wherein each of the two ball valve assemblies further comprises a linkage member, a push-top member, a lifting member and a transmission wheel, one end of the linkage member is elastically connected to the valve body, another end of the linkage member is convexly provided with a linkage block, the linkage member cooperates with the push-top member and is configured to drive the push-top member to move upward or downward, the transmission wheel is circumferentially and fixedly sleeved outside the valve stem, a radial inner side of the rack is provided with a push-top portion, a circumferential length of the push-top portion is less than a circumferential length of the rack, and the rack covers the push-top portion; and
the push-top portion is configured to push the linkage block to switch the linkage member from an ejected position to a pushed-in position, in the ejected position, the push-top member pushes against the lifting member, the lifting member is disposed to pass through the gear to lift the transmission wheel until the transmission wheel is disengaged from the gear, in the pushed-in position, the lifting member moves downward along with the push-top member, and the transmission wheel is engaged with the gear and is configured to rotate synchronously with the gear.
3 . The ball valve butt-joint structure of claim 2 , wherein the linkage block is shaped as an isosceles triangle or an isosceles trapezoid, and two circumferential ends of the push-top portion have matching inclined surfaces that match two inclined surfaces of the linkage block.
4 . The ball valve butt-joint structure of claim 2 , wherein a bottom surface of the linkage member is provided with a first push block, the first push block has a first push-top inclined surface, a bottom surface of the push-top member is provided with a second push block, the second push block has a second push-top inclined surface, and the first push-top inclined surface is in sliding fit with the second push-top inclined surface, so as to drive the push-top member to move downward when the linkage member moves to the pushed-in position.
5 . The ball valve butt-joint structure of claim 2 , wherein a mounting platform is disposed on the valve body, a circumferential side of the mounting platform is provided with a frame, and a first elastic member is abutted between an end of the linkage member facing away from the linkage block and the frame.
6 . The ball valve butt-joint structure of claim 5 , wherein the frame is provided with a slide hole, and the end of the linkage member facing away from the linkage block is slidably disposed within the slide hole.
7 . The ball valve butt-joint structure of claim 2 , wherein the push-top member comprises a chassis and a push-top rod connected to the chassis, the push-top rod is configured to push against the lifting member, a mounting platform is disposed on the valve body, a circumferential side of the chassis is provided with a lug, and a second elastic member is abutted between the lug and the mounting platform.
8 . The ball valve butt-joint structure of claim 7 , wherein a limit rod is vertically disposed on the mounting platform, the second elastic member is sleeved outside the limit rod, the lug is provided with a limit hole, and the limit rod is disposed to pass through the limit hole.
9 . The ball valve butt-joint structure of claim 7 , wherein an outer periphery of the valve stem is fixedly connected to a rotation disk, the rotation disk is located between the chassis and the lifting member, the rotation disk is provided with a through hole, and in the ejected position, the push-top rod is configured to push against the lifting member via the through hole.
10 . The ball valve butt-joint structure of claim 9 , wherein two push-top rods are disposed on the chassis, the two push-top rods are disposed opposite to each other, the rotation disk is provided with four through holes, and the four through holes are uniformly disposed at intervals in a circumferential direction of the rotation disk.
11 . The ball valve butt-joint structure of claim 2 , wherein the lifting member comprises a lifting disk and a plurality of lifting rods connected to the lifting disk, the plurality of lifting rods are uniformly disposed at intervals in a circumferential direction of the lifting disk, the lifting disk is located between the gear and the push-top member, and the plurality of lifting rods are configured to pass through the gear to lift the transmission wheel.
12 . The ball valve butt-joint structure of claim 2 , wherein one of an outer wall of the valve stem and an inner wall of the transmission wheel is provided with a convex rib, another of the outer wall of the valve stem and the inner wall of the transmission wheel is provided with a groove, and the convex rib is configured to be inserted into and fitted with the groove.
13 . The ball valve butt-joint structure of claim 2 , wherein a center of the gear is provided with an accommodation hole for accommodating the transmission wheel, and a hole wall of the accommodation hole is engaged with an outer peripheral wall of the transmission wheel through gear teeth.
14 . The ball valve butt-joint structure of claim 2 , wherein a top end of the valve stem is connected to a top cap, an outer diameter of the top cap is greater than an outer diameter of the valve stem, a third elastic member is sleeved outside the valve stem, and the third elastic member is abutted between the top cap and the transmission wheel.
15 . The ball valve butt-joint structure of claim 1 , wherein one end of each valve body is provided with a flange, the two ball valve assemblies are butt-jointed at the flanges, the rack and a rotation hole which corresponds to a position of the gear and extends circumferentially are disposed on each flange, and the rack on one flange is configured to pass through the rotation hole on another flange and mesh with the gear corresponding to the rotation hole.
16 . The ball valve butt-joint structure of claim 15 , wherein the rotation hole comprises a first hole segment and a second hole segment communicating with each other, a radial width of the first hole segment is greater than a radial width of the second hole segment, the rack comprises a rack main body and a connection portion connected between the flange and the rack main body, a radial thickness of the rack main body is greater than a radial thickness of the connection portion, the rack main body is fitted to the first hole segment, and the connection portion is fitted to the second hole segment.