Forced sealing ball valve stem guide structure
A technology of forced sealing and guiding structure, applied in the direction of valve housing structure, shaft sealing, valve details, etc., can solve the problems of high maintenance cost, short service life, wear and tear, etc., to reduce maintenance cost, improve service life, and simplify the disassembly process Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0050] refer to Figure 1 to Figure 10 As shown, the stem guide structure of the forced sealing ball valve of the present invention includes a driving assembly connected in sequence, a valve cover 3 and a valve body 4. The valve cover 3 is provided with a valve stem 5 and a wedge-shaped shaft 6 connected with the valve stem. A ball 7 and a valve seat 8 are provided, two guide rail grooves 9 are arranged symmetrically on the wedge shaft, a guide shaft 10 is fixedly connected to the valve cover, and the guide shaft extends into the guide rail groove; a wedge surface 601 is provided on the lower part of the wedge shaft, The sphere is provided with a wedge-shaped pin 701 matching the wedge-shaped surface, and the guide rail groove 9 includes a first straight groove section 901, a helical section 902 and a second straight groove section 903 connected in sequence, the first straight groove section 901 and the second straight groove section 901. The straight groove section 903 is ver...
Embodiment 2
[0064]The center of the ball channel hole of the traditional forced sealing ball valve overlaps with the center line of the valve stem, that is, it is centered. Due to the influence of the sealing surface of the ball, the ball will rotate 90° from the closed state to the open state. The center of the channel hole of the valve body is not on the same center line as the center of the channel hole of the valve body, so that the medium cannot flow through the valve body in full, which reduces the cross-sectional area of the medium circulation and reduces the efficiency of the medium circulation.
[0065] refer to Figure 9 and Figure 10 , On the basis of Embodiment 1, this embodiment is provided with an upper hole 703 movably connected with the wedge-shaped shaft at the center of the upper end surface of the sphere, and the center of the sphere flow channel hole is horizontally spaced from the center line of the upper hole by a certain distance. When the forced sealing ball va...
Embodiment 3
[0069] refer to figure 2 and image 3 , on the basis of Embodiment 1, in this embodiment, a packing 501 is provided on the upper part of the valve stem, a first grease injection valve 301 is provided on the bonnet corresponding to the packing, and a valve 301 is provided on the bonnet between the wedge shaft and the packing. The cleaning hole 302 connected to the inner cavity of the valve cover, the top of the wedge-shaped shaft is provided with a through hole 603 connected with the guide rail groove, the bottom of the guide rail groove is provided with a slot 904 connected with the valve body, and the valve body is provided with a drain hole, the drain hole There is a drain valve 401 on it.
[0070] The traditional forced sealing ball valve is also equipped with a first grease injection valve without a cleaning hole, but the first grease injection valve only lubricates the packing and the valve stem, and cannot lubricate the wedge shaft and guide rail groove. Excessive fri...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More