Valve rod sealing structure
By designing a compression structure in the valve, driving the rotary plate to rotate and using a spring to press the sealing gasket, the problem of poor sealing of existing valves when the fluid passes through at high speed is solved, and higher sealing and safety are achieved.
Patent Information
- Application Number
- CN202421638198.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-11
AI Technical Summary
When existing valves pass through high-speed fluid, the sealing gasket cannot effectively block the impact, resulting in leakage and poor sealing effect.
A valve stem sealing structure is designed. When rotating the valve stem main body by the compression structure, the rotating plate is driven to rotate in the collar, and the sealing gasket is pressed with a spring and a compression plate to prevent it from bounce and leaking.
It effectively prevents leakage during high-speed passage of fluid and improves the sealing and safety of the valve.
Smart Images
Figure CN222760399U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a valve stem sealing structure. Background Art
[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc.
[0003] In the process of using existing valves, the sealing method of the valve stem is mostly solved by an annular sealing gasket. The use of a sealing gasket alone cannot block the impact generated when the fluid in the valve passes through at high speed, thereby causing leakage and affecting the sealing effect. Based on the shortcomings of the existing technology, the utility model designs a valve stem sealing structure. Utility Model Content
[0004] In view of the deficiencies of the prior art, the utility model provides a valve stem sealing structure, which has the advantage of compressing the sealing gasket when the fluid passes through at high speed to prevent the sealing gasket from bouncing up and causing fluid leakage.
[0005] The utility model provides the following technical solutions: a valve stem sealing structure, which is installed on a valve seat, a valve cover is arranged on the top of the valve seat, a valve stem body is rotatably installed inside the valve cover, a fixing plate is arranged on the outer surface of the valve cover, and a clamping structure is arranged on the top of the fixing plate; the clamping structure comprises four sleeves, two side frames and a rotary plate, springs are installed inside the four sleeves, sleeve columns are installed at one end of the top of the four springs, pressure covers are installed on the top of the four sleeve columns, a pressure plate is installed at the bottom of the pressure cover, a triangular wedge is installed on the top of the pressure cover, a collar is installed between the two side frames, a plurality of balls are arranged inside the collar, and a downward pressing wedge is arranged at the bottom of the rotary plate.
[0006] As a preferred technical solution of the utility model, the two side frames are fixedly connected to the top of the valve seat, and the rotary plate is arranged on the outer surface of the valve stem body.
[0007] As a preferred technical solution of the utility model, a top block is arranged on the top of the valve stem body, and a hand wheel is arranged on the outer surface of the valve stem body.
[0008] As a preferred technical solution of the utility model, a first gasket is arranged inside the valve cover, and a second gasket is placed on the top of the first gasket.
[0009] As a preferred technical solution of the utility model, there is a gap between the first gasket and the valve stem body, and the bottom of the second gasket can fit into the gap between the first gasket and the valve stem body to form a seal.
[0010] As a preferred technical solution of the utility model, a valve body is arranged at the bottom of the valve seat, a ball valve is arranged inside the valve body, and the ball valve is fixedly connected to one end of the bottom of the valve stem body.
[0011] As a preferred technical solution of the utility model, connecting flanges are provided at both ends of the valve body.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] 1. This valve stem sealing structure has a clamping structure. When the valve stem body is rotated to open the inside of the valve body, the valve stem body drives the rotary plate to rotate inside the sleeve ring. At this time, the downward pressing wedge contacts the hypotenuse of the triangular wedge. Due to the setting of the spring, when the rotary plate continues to rotate to fully open the inside of the valve body, the tip of the downward pressing wedge is located at the highest point of the hypotenuse of the triangular wedge. At this time, the gland drives the sleeve column to press down, so that the pressure plate can press the second gasket, so that the second gasket and the first gasket fit more closely, thereby achieving the purpose of clamping the second gasket and the first gasket when the fluid inside the valve body passes through at high speed to prevent them from bouncing up and causing fluid leakage, thereby improving the sealing and safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the appearance structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the main structure of the valve stem of the utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the fixed plate of the utility model;
[0017] Figure 4 This is a schematic diagram of the spring structure of the utility model;
[0018] Figure 5 It is a schematic diagram of the rotary plate structure of the utility model.
[0019] In the figure: 1. valve seat; 2. valve cover; 3. valve stem body; 4. hand wheel; 5. clamping structure; 51. sleeve; 52. spring; 53. sleeve column; 54. pressure cover; 55. pressure plate; 56. triangular wedge; 57. side frame; 58. collar; 59. ball; 510. rotary plate; 511. pressing wedge; 6. valve body; 7. connecting flange; 8. first gasket; 9. second gasket; 10. fixing plate. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-5 A valve stem sealing structure is installed on a valve seat 1. A valve cover 2 is provided on the top of the valve seat 1. A valve stem body 3 is rotatably installed inside the valve cover 2. A fixing plate 10 is provided on the outer surface of the valve cover 2. A clamping structure 5 is provided on the top of the fixing plate 10. The clamping structure 5 includes four sleeves 51, two side frames 57 and a rotary plate 510. Springs 52 are installed inside the four sleeves 51. A sleeve column 53 is installed at one end of the top of the four springs 52. A pressure cap 54 is installed on the top of the four sleeve columns 53. A pressure plate 55 is installed at the bottom of the pressure cap 54. A triangular wedge block 56 is installed on the top of the pressure cap 54. A sleeve ring 58 is installed between the two side frames 57. A plurality of balls 59 are provided inside the sleeve ring 58. A downward pressing wedge block 511 is provided at the bottom of the rotary plate 510.
[0022] See also Figure 4-5 The two side frames 57 are fixedly connected to the top of the valve seat 1 , and the rotary plate 510 is arranged on the outer surface of the valve stem body 3 .
[0023] When the valve stem body 3 is rotated to open the inside of the valve body 6, the valve stem body 3 drives the rotary plate 510 to rotate inside the sleeve ring 58. At this time, the downward pressing wedge block 511 contacts the hypotenuse of the triangular wedge block 56. Due to the setting of the spring 52, when the rotary plate 510 continues to rotate to cause the inside of the valve body 6 to be fully opened, the tip of the downward pressing wedge block 511 is located at the highest point of the hypotenuse of the triangular wedge block 56. At this time, the pressure cover 54 drives the sleeve column 53 to press down.
[0024] See also Figure 1-3 , a top block is provided at the top of the valve stem body 3, and a hand wheel 4 is provided on the outer surface of the valve stem body 3. A first gasket 8 is provided inside the valve cover 2, and a second gasket 9 is placed on the top of the first gasket 8. There is a gap between the first gasket 8 and the valve stem body 3, and the bottom of the second gasket 9 can fit with the gap between the first gasket 8 and the valve stem body 3 to form a seal. A valve body 6 is provided at the bottom of the valve seat 1, and a ball valve is provided inside the valve body 6, and the ball valve is fixedly connected to one end of the bottom of the valve stem body 3. Connecting flanges 7 are provided at both ends of the valve body 6.
[0025] When the pressure plate 55 presses the second gasket 9, the second gasket 9 can fit more closely with the gap between the first gasket 8 and the valve stem body 3, achieving a sealing effect and preventing the second gasket 9 from being lifted up and ejected when the fluid flows at high speed.
[0026] Working principle: when a valve stem sealing structure is used, when the valve body 6 is in the closed state, the spring 52 drives the sleeve 53 to lift up. At this time, the inside of the valve body 6 is sealed. When the valve stem body 3 is rotated to open the inside of the valve body 6, the valve stem body 3 drives the rotary plate 510 to rotate inside the sleeve ring 58. At this time, the downward pressing wedge block 511 contacts the hypotenuse of the triangular wedge block 56. Due to the setting of the spring 52, when the rotary plate 510 continues to rotate to cause the inside of the valve body 6 to be fully opened, the tip of the downward pressing wedge block 511 is located at the highest point of the hypotenuse of the triangular wedge block 56. At this time, the pressure cover 54 drives the sleeve 53 to press down, so that the pressure plate 55 can press the second gasket 9, so that the second gasket 9 and the first gasket 8 fit more closely, thereby achieving the goal of pressing the second gasket 9 and the first gasket 8 when the fluid passes through the valve body 6 at a high speed, so as to prevent the second gasket 9 from being lifted up and popped out when the fluid flows at a high speed.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A valve stem sealing structure, mounted on a valve seat (1), characterized in that: A valve cover (2) is arranged on the top of the valve seat (1), a valve stem body (3) is rotatably mounted inside the valve cover (2), a fixing plate (10) is arranged on the outer surface of the valve cover (2), and a clamping structure (5) is arranged on the top of the fixing plate (10); The clamping structure (5) comprises four sleeves (51), two side frames (57) and a rotary plate (510), wherein a spring (52) is installed inside the four sleeves (51), a sleeve column (53) is installed at one end of the top of the four springs (52), a pressure cover (54) is installed on the top of the four sleeve columns (53), a pressure plate (55) is installed at the bottom of the pressure cover (54), a triangular wedge block (56) is installed on the top of the pressure cover (54), a sleeve ring (58) is installed between the two side frames (57), a plurality of balls (59) are arranged inside the sleeve ring (58), and a downward pressing wedge block (511) is arranged at the bottom of the rotary plate (510).
2. A valve stem sealing structure according to claim 1, characterized in that: The two side frames (57) are fixedly connected to the top of the valve seat (1), and the rotary plate (510) is arranged on the outer surface of the valve stem body (3).
3. A valve stem sealing structure according to claim 1, characterized in that: A top block is arranged on the top of the valve stem body (3), and a hand wheel (4) is arranged on the outer surface of the valve stem body (3).
4. A valve stem sealing structure according to claim 1, characterized in that: A first gasket (8) is arranged inside the valve cover (2), and a second gasket (9) is placed on the top of the first gasket (8).
5. A valve stem sealing structure according to claim 4, characterized in that: There is a gap between the first gasket (8) and the valve stem body (3), and the bottom of the second gasket (9) can fit into the gap between the first gasket (8) and the valve stem body (3) to form a seal.
6. A valve stem sealing structure according to claim 1, characterized in that: A valve body (6) is arranged at the bottom of the valve seat (1), a ball valve is arranged inside the valve body (6), and the ball valve is fixedly connected to one end of the bottom of the valve stem body (3).
7. A valve stem sealing structure according to claim 6, characterized in that: Connecting flanges (7) are provided at both ends of the valve body (6).