Connecting structure of split type fixing shaft
Through the split fixed shaft structure, the fixed shaft of different materials and the sealing cover are connected, which solves the problems of high costs, large torque and short life in the prior art, and achieves the effects of reducing torque, extending valve life and reducing replacement costs.
Patent Information
- Application Number
- CN202422668631.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-11-04
AI Technical Summary
The fixing shaft material of the existing fixed ball valve is consistent with the inner part, resulting in high cost, increased torque and short service life, and serious problems with loose fasteners.
The split fixed shaft structure is adopted, and the fixed shaft is divided into two parts, the fixed shaft and the sealing cover, and is connected by different materials by sliding bearings and sealing rings, and fixed by screws, and the positioning part is inserted to achieve positioning.
Reduces the torque demand of the valve, improves the life of the valve, avoids loose fasteners, and reduces replacement costs.
Smart Images
Figure CN223242136U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valve fixed shaft connection, in particular to a split fixed shaft connection structure. Background Art
[0002] Currently, the opening and closing element of a trunnion-mounted ball valve consists of a sphere with a fixed shaft. A central channel equal to the pipe diameter is flanked by two floating valve seats. The ball rotates without deviating from the axis of the valve stem. The fixed shaft is supported by two sliding bearings above and below. The valve seats are floating and, under the influence of the medium, push against the ball to generate a contact force, ensuring a reliable seal. Our company's current trunnion-mounted ball valves primarily consist of an integrated fixed shaft and ball. The fixed shaft is generally made of the same material as the internal components. This increases costs, increases torque, and reduces service life.
[0003] To this end, we have developed a split fixed shaft connection structure to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a split type fixed shaft connection structure, which has the advantages of being easy to install and position, reducing torque, increasing valve life, and saving costs.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a split-type fixed shaft connection structure, including a fixed shaft, the top end of the fixed shaft is pressed into a sphere through a sliding bearing, the bottom end of the fixed shaft is positioned and pressed into a sealing cover, the bottom position of the fixed shaft is pressed into a valve body through a sealing ring, a sealing gasket is pressed between the sealing cover and the valve body, and they are fixedly connected by screws, a positioning piece is provided at the center position of the top end of the sealing cover, and the positioning piece is positioned and plugged into the fixed shaft.
[0006] Furthermore, a positioning groove is provided at the bottom end of the fixed shaft, and the positioning groove is plugged into the positioning piece.
[0007] Furthermore, the positioning member is a prismatic structure or a cylindrical structure.
[0008] Furthermore, a first stepped groove is provided on the top of the sealing cover, and the sealing gasket is pressed between the first stepped groove and the valve body.
[0009] Furthermore, a second stepped groove is provided at the inner bottom end of the valve body, and the second stepped groove is press-fitted with the sealing gasket.
[0010] Furthermore, a step groove is provided on the inner wall of the valve body, a plane is provided on the top end of the sealing cover, and the step groove abuts against the plane.
[0011] Furthermore, the sealing cover is provided with connection holes evenly distributed around the circumference, and the bottom end of the valve body is provided with screw holes, and the screw holes and the connection holes are fixedly connected by the screws.
[0012] Furthermore, an annular groove is provided on the outer wall of the bottom of the fixed shaft, and a sealing ring is sealed and pressed between the annular groove and the inner wall of the valve body.
[0013] Furthermore, a lower plug hole is provided at the bottom end of the sphere, a sliding bearing is pressed into the lower plug hole, and a boss is provided at the top end of the fixed shaft, and the boss is slidably connected to the sliding bearing.
[0014] Furthermore, the shortest distance between the top end of the fixed shaft and the lower plug hole is L1, and the shortest distance between the boss and the bottom end of the sphere is L2, where L2≥L1.
[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:
[0016] The split fixed shaft connection structure described in the utility model has a fixed shaft structure divided into two parts, a fixed shaft and a sealing cover. The sealing cover material does not need to be consistent with the internal part, so that a higher strength material can be selected at the same price, and the fixed shaft can also be made smaller, thereby reducing the valve torque and facilitating positioning and installation. In addition, the valve will cause the fixed shaft to be subjected to stress during operation, and aging after long-term use will cause the fixed shaft to wear and the fasteners to loosen, resulting in the valve being unable to operate normally. This structure can completely avoid the problem of fastener loosening, and the replacement cost after the fixed shaft is worn is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural schematic diagram of the connection structure of the split fixed shaft described in the utility model.
[0018] Figure 2 It is a structural schematic diagram of the top end of the sealing cover described in the present invention.
[0019] Figure 3 This is a structural schematic diagram of the bottom end of the fixed shaft described in the present utility model. DETAILED DESCRIPTION
[0020] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
[0021] Figures 1 to 3In the invention, a split fixed shaft connection structure is provided, comprising a fixed shaft 3, the top end of the fixed shaft 3 being pressed against a sphere 2 via a sliding bearing 6, the bottom end of the fixed shaft 3 being positioned and pressed against a sealing cover 8, the bottom end of the fixed shaft 3 being pressed against a valve body 1 via a sealing ring 5, a sealing gasket 4 being pressed against the sealing cover 8 and the valve body 1, and being fixedly connected by screws 7, a positioning member 851 being provided at the top center of the sealing cover 8, the positioning member 851 being positioned and plugged into the fixed shaft 3. A second stepped groove 11 is provided at the inner bottom end of the valve body 1, a stepped groove 12 is provided on the inner wall of the valve body 1, the second stepped groove 11 being pressed against the sealing gasket 4. A flat surface 85 is provided at the top end of the sealing cover 8, the stepped groove 12 being in contact with the flat surface 85. A lower insertion hole 21 is provided at the bottom end of the sphere 2, the lower insertion hole 21 being pressed against a sliding bearing 6, a boss 31 is provided at the top end of the fixed shaft 3, the top end of the boss 31 being slidably connected to the sliding bearing 6. A positioning groove 35 is provided at the bottom end of the fixed shaft 3, and the positioning groove 35 is plugged into the positioning member 851. The positioning member 851 is a prismatic structure or a cylindrical structure, which is convenient for positioning and locking. An annular groove 32 is provided on the bottom outer wall of the fixed shaft 3, and a sealing ring 5 is sealed and pressed between the annular groove 32 and the inner wall of the valve body 1. The sealing ring 5 seals the lower side of the gap between the ball and the valve body, and the sealing gasket 4 performs secondary sealing. The shortest distance between the top of the fixed shaft 3 and the lower plug hole 21 is L1, and the shortest distance between the boss 31 and the bottom end of the ball 2 is L2, L2 ≥ L1, so that the shoulder of the boss 31 and the sliding bearing are clearly matched. A first stepped groove 81 is provided at the top of the sealing cover 8, and the sealing gasket 4 is pressed between the first stepped groove 81 and the valve body 1. The sealing cover 8 is provided with connecting holes 82 evenly distributed around the circumference, and a screw hole 15 is provided at the bottom end of the valve body 1. The screw hole 15 and the connecting hole 82 are fixedly connected by screws 7.
[0022] A lower socket is provided at the lower end of the sphere 2, and the lower socket is slidably connected to the top of the fixed shaft 3 through a sliding bearing. The fixed shaft 3 is rotatably mounted on the bottom of the valve body 1. The sealing cover 8 is positioned through the positioning piece and the positioning groove. The sealing cover 8 is fixedly mounted on the valve body 1 by screws 8, sealing the mounting port of the fixed shaft 3 at the bottom of the valve body 1. The fixed shaft structure is divided into a fixed shaft and a sealing cover. The sealing cover material does not need to be consistent with the internal parts, so that a higher strength material can be selected at the same price. The fixed shaft can also be made smaller, thereby reducing the valve torque and facilitating positioning and installation. The valve will put stress on the fixed shaft during operation. Aging after long-term use will cause the fixed shaft to wear and the fasteners to loosen, causing the valve to fail to operate normally. The connection structure of the split fixed shaft can completely avoid the problem of loose fasteners, and the replacement cost of the fixed shaft after wear is reduced.
[0023] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.
Claims
1. A split fixed shaft connection structure, characterized by: The invention comprises a fixed shaft (3), the top end of the fixed shaft (3) is pressed against a ball (2) via a sliding bearing (6), the bottom end of the fixed shaft (3) is positioned and pressed against a sealing cover (8), the bottom position of the fixed shaft (3) is pressed against a valve body (1) via a sealing ring (5), a sealing gasket (4) is pressed between the sealing cover (8) and the valve body (1), and the sealing cover (8) and the valve body (1) are fixedly connected via screws (7), a positioning piece (851) is provided at the center position of the top end of the sealing cover (8), and the positioning piece (851) is positioned and plugged into the fixed shaft (3).
2. The connection structure of the split fixed shaft according to claim 1, characterized in that: A positioning groove (35) is provided at the bottom end of the fixed shaft (3), and the positioning groove (35) is plugged into the positioning member (851).
3. The connection structure of the split fixed shaft according to claim 2, characterized in that: The positioning member (851) is a prismatic structure or a cylindrical structure.
4. The connection structure of the split fixed shaft according to claim 1, characterized in that: A first stepped groove (81) is provided at the top end of the sealing cover (8), and the sealing gasket (4) is pressed between the first stepped groove (81) and the valve body (1).
5. The connection structure of the split fixed shaft according to claim 1, characterized in that: The inner bottom end of the valve body (1) is provided with a second stepped groove (11), and the second stepped groove (11) is press-connected with the sealing gasket (4).
6. The connection structure of the split fixed shaft according to claim 1, characterized in that: A step groove (12) is provided on the inner wall of the valve body (1), a plane (85) is provided on the top end of the sealing cover (8), and the step groove (12) abuts against the plane (85).
7. The connection structure of the split fixed shaft according to claim 1, characterized in that: The sealing cover (8) is provided with connection holes (82) evenly distributed around the circumference, and the bottom end of the valve body (1) is provided with screw holes (15), and the screw holes (15) and the connection holes (82) are fixedly connected by the screws (7).
8. The connection structure of the split fixed shaft according to claim 1, characterized in that: An annular groove (32) is provided on the bottom outer wall of the fixed shaft (3), and a sealing ring (5) is sealed and pressed between the annular groove (32) and the inner wall of the valve body (1).
9. The connection structure of the split fixed shaft according to claim 1, characterized in that: A lower plug hole (21) is provided at the bottom end of the sphere (2), and a sliding bearing (6) is pressed into the lower plug hole (21). A boss (31) is provided at the top end of the fixed shaft (3), and the boss (31) is slidably connected to the sliding bearing (6).
10. The connection structure of the split fixed shaft according to claim 9, characterized in that: The shortest distance between the top end of the fixed shaft (3) and the lower plug hole (21) is L1, and the shortest distance between the boss (31) and the bottom end of the sphere (2) is L2, where L2≥L1.