Valve rod lifting track ball valve
A lifting type, valve stem technology, applied in the direction of valve devices, cocks including cut-off devices, engine components, etc., can solve problems such as large pressure and friction, easy shearing of bolt guide pins and large pressure difference, and reduced service life of orbital ball valves. , to achieve the effect of reasonable structural design
Active Publication Date: 2012-09-19
ZHEJIANG WANLONG MACHINERY
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Problems solved by technology
[0003] The main problem of the stem-lifting orbital ball valve in the prior art is that the guide groove is a single-segment spiral groove, and the pressure angle of the bolt guide pin when sliding in the guide groove is not considered. In the process of lifting the valve stem, rotating 90 degrees, and turning the ball to open and close the valve, the bolt guide pin is easy to shear and the pressure difference is too large (that is, energy loss), so that the handwheel acts on the torque of the valve stem and the bolt The pressure and friction on the guide pin are relatively large, which reduces the service life of the orbital ball valve
Method used
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Embodiment
[0019] Example: see Figure 1 to Figure 6 , the embodiment of the present invention includes a valve body 1, a valve cover 2, a packing 3, a sealing guide seat 4, a packing gland 5, a valve stem 6, a bolt guide pin 7, a pin shaft 8, a hand wheel 9, a ball 10, and a ball gland 11.
[0020] The valve cover 1 is fixedly connected with the valve body 2 by bolts.
[0021] The pin 8 is mounted on a sphere 10 .
[0022] One end of the valve stem 6 is formed into a screw rod 12, which is connected with the handwheel 9 through a valve stem nut 13; The toggle end 14 is clamped with the pin shaft 8 , specifically, the inclined surface 15 is clamped with the pin shaft 8 . When the toggle end 14 rotates, the inclined surface 15 and the pin shaft 8 have an active force, so that the pin shaft 8 rotates, and the pin shaft 8 drives the ball 10 to rotate. The angle α1 between the slope 15 and the plane 16 is an acute angle, and the angle α1 is the same as the pressure angle of the slope 15 ...
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The invention relates to a valve rod lifting track ball valve, which comprises a valve body, a valve cap, a filler, a seal guiding base, a filling gland, a valve rod, a bolt guide pin, a pin shaft, a hand wheel, a ball body and a ball body pressing sleeve. The valve rod lifting track ball valve is characterized in that: a spiral guiding section is divided into a first section, a second section and a third section, and the first section, the second section and the third section are connected sequentially; and after the spiral guiding section is unfolded, an angle of intersection of a central axis of the first section and the cross section of a valve rod is 58 degrees, an angle of intersection of a central axis of the second section and the cross section of the valve rod is 50 degrees, and an angle of intersection of a central axis of the third section and the cross section of the valve rod is 32 degrees. The valve rod lifting track ball valve has reasonable structural design, and the bolt guide pin and the valve rod are protected.
Description
technical field [0001] The invention relates to a valve stem lifting type track ball valve. Background technique [0002] The stem-lifting track ball valve of the prior art, as shown in the Chinese invention patent No. 01206627.3 and the Chinese invention patent No. 200920113119.4, consists of main parts such as a valve body, a ball, a valve cover, a valve stem, and a hand wheel. Composition, its working principle is: the hand wheel rotates the screw rod on the valve stem through the stem nut to make the valve stem rise or fall, and the bolt guide pin guides the guide groove on the valve stem to drive the valve stem to rotate by 90 degrees, and the valve stem rotates by 90 degrees. During the process, the toggle end of the valve stem drives the ball to rotate 90 degrees to break away from or press against the valve seat. In this way, the rise or fall of the valve stem drives the ball to open or close the valve. [0003] The main problem of the stem-lifting orbital ball valv...
Claims
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IPC IPC(8): F16K5/06F16K5/08
Inventor 程兴炎
Owner ZHEJIANG WANLONG MACHINERY