Low-leakage single-seat valve
The low-leakage single-seat valve, designed with threaded connection and limiting structure, solves the problem of airtight gasket wear caused by frequent up-and-down movement in traditional single-seat valves, achieving stable sealing performance and reducing leakage.
Patent Information
- Application Number
- CN202520616285.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-03
AI Technical Summary
In traditional single-seat valves, the frequent up-and-down movement of the valve core during rotation and pressure causes severe wear on the airtight gasket, resulting in decreased sealing performance and leakage problems.
The design of the adjusting rod and valve core with threaded connection ensures that the adjusting rod only rotates without moving up and down. Combined with the fixing structure of the airtight pad, it ensures that the airtight pad does not shift during rotation. The rotation of the valve core is restricted by the limit block to achieve stable lifting and lowering movement.
It effectively extends the service life of the airtight gasket, reduces the risk of leakage, and improves sealing performance.
Smart Images
Figure CN223923837U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to single seat valve technical field, concretely is a kind of low leakage single seat valve. BACKGROUND
[0002] Single seat valve is a kind of fluid control valve, its feature is that there is only one contact surface between valve core and valve seat, and the on-off and flow of fluid are adjusted by controlling the position of valve core. Due to its simple structure, accurate control, single seat valve is widely used in fluid control system in chemical industry, petroleum, pharmaceutical and other fields.
[0003] Traditional single seat valve is usually switched by rotating and pressing down; in actual use, since the valve core needs to move up and down during rotating and pressing down, this frequent up and down movement is easy to cause great wear of air-tight pad, thereby leading to the problems of sealing performance decline and leakage.
[0004] Therefore, there is a need for a low leakage single seat valve to solve the above problems. UTILITY MODEL CONTENTS
[0005] In view of the deficiencies of the prior art, the utility model provides a kind of low leakage single seat valve, solve the problem that the above background technique mentions due to the valve core needs to move up and down during rotating and pressing down, this frequent up and down movement is easy to cause great wear of air-tight pad, thereby leading to the problems of sealing performance decline and leakage.
[0006] To achieve the above purpose, the utility model provides the following technical scheme: a kind of low leakage single seat valve, including valve body, adjusting mechanism and air-tight mechanism, the valve body upper end is provided with adjusting mechanism, adjusting mechanism is provided with air-tight mechanism between valve body, the valve body includes shell, the first passageway is opened in the shell inside upper end, the second passageway is opened in the shell inside lower end, the valve seat is fixed between the first passageway and the second passageway, the adjusting mechanism includes adjusting base, the adjusting base is installed on the shell upper end by bolt, the supporting frame is fixed on the adjusting base upper end, the adjusting rod is installed in the supporting frame middle through bearing, the valve core is provided in the adjusting rod lower end, the valve core position corresponds with valve seat, the screw rod is fixed on the valve core upper end, the screw hole is opened in the adjusting rod lower end, and the screw rod is rotatably installed in the screw hole.
[0007] As preferred, the air-tight mechanism includes gasket groove, the air-tight pad is installed in the gasket groove, and the air-tight pad is installed on the outer side of adjusting rod.
[0008] As further preferred, the gasket groove upper end is provided with pressing block, the pressing block lower end is connected with gasket groove by bolt, and the pressing block is located on the upper end of air-tight pad.
[0009] As preferred, the valve core is fixed with a limiting block on both sides, the shell is fixed with a limiting strip slot on both sides, and the limiting block is movably installed in the limiting strip slot.
[0010] As preferred, the first channel and the second channel are provided with a butt joint disc outside, the butt joint disc is fixed on both sides of the shell, and the shell is connected with the butt joint pipe through the butt joint disc and the bolt.
[0011] As preferred, the adjusting rod is provided with a wheel disc at the upper end, and the wheel disc is fixed with the adjusting rod through the bolt. Beneficial effects
[0012] The low-leakage single-seat valve has the following beneficial effects: in actual use, the threaded hole at the lower end of the adjusting rod is matched with the threaded rod at the upper end of the valve core, so that the adjusting rod only rotates during rotation and does not move up and down, thereby avoiding the longitudinal wear of the air-tight gasket caused by frequent lifting during the adjustment of the traditional single-seat valve, effectively prolonging the service life of the air-tight gasket and reducing the risk of leakage. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic view of the utility model;
[0014] Figure 2 It is a sectional structure schematic view of the valve core in an open state;
[0015] Figure 3 It is a sectional structure schematic view of the valve core in a closed state;
[0016] Figure 4 It is a side sectional structure schematic view of the utility model;
[0017] Figure 5 It is a front sectional structure schematic view of the utility model;
[0018] Figure 6 It is a local structure schematic view of the utility model.
[0019] In the drawing: 1, valve body; 11, shell; 12, first channel; 13, second channel; 14, valve seat; 15, limiting strip slot; 2, adjusting mechanism; 21, adjusting base; 22, supporting frame; 23, bearing; 24, adjusting rod; 241, threaded hole; 25, valve core; 251, threaded rod; 252, limiting block; 3, air-tight mechanism; 31, gasket slot; 32, lower pressing block; 33, air-tight gasket; 4, bolt; 5, butt joint disc; 51, butt joint pipe; 6, wheel disc. DETAILED DESCRIPTION
[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0021] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0022] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, so that the features with "first" and "second" can explicitly or implicitly include one or more of the features, and in the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.
[0023] Please refer to Figures 1-6 The present application provides a technical scheme: a low-leakage single-seat valve, comprising a valve body 1, an adjusting mechanism 2 and an airtight mechanism 3, the upper end of the valve body 1 is provided with the adjusting mechanism 2, the adjusting mechanism 2 and the valve body 1 are provided with the airtight mechanism 3, the valve body 1 comprises a shell 11, the inside upper end of the shell 11 is provided with a first channel 12, the inside lower end of the shell 11 is provided with a second channel 13, the first channel 12 and the second channel 13 are fixed with a valve seat 14, the adjusting mechanism 2 comprises an adjusting base 21, the adjusting base 21 is installed on the upper end of the shell 11 through a bolt 4, the upper end of the adjusting base 21 is fixed with a supporting frame 22, the supporting frame 22 is installed with an adjusting rod 24 through a bearing 23 in the middle, the lower end of the adjusting rod 24 is provided with a valve core 25, the position of the valve core 25 corresponds to the valve seat 14, the upper end of the valve core 25 is fixed with a threaded rod 251, the lower end of the adjusting rod 24 is provided with a threaded hole 241, the threaded rod 251 is rotatably installed in the threaded hole 241;
[0024] In use, the adjusting rod 24 can drive the threaded rod 251 and the valve core 25 to ascend and descend along the guide of the thread by screwing, while the adjusting rod 24 only rotates without moving up and down. The support frame 22 and the bearing 23 effectively stabilize the rotating path of the adjusting rod 24, reduce unnecessary swing or tilt, and further protect the cooperation of the air-tight pad 33 and the valve core 25.
[0025] The air-tight mechanism 3 comprises a pad slot 31, in which an air-tight pad 33 is installed. The air-tight pad 33 is installed outside the adjusting rod 24, and the pad slot 31 fixes the position of the air-tight pad 33 to ensure that it does not deviate during the rotation of the adjusting rod 24. The air-tight pad 33 blocks the leakage of fluid between the adjusting rod 24 and the valve body 1 through adhesion sealing.
[0026] The lower end of the pressing block 32 is connected to the pad slot 31 by a bolt. The pressing block 32 is located at the upper end of the air-tight pad 33, and the air-tight pad 33 is pressed tightly in the pad slot 31 by the pressing block 32 through a bolt, ensuring that the air-tight pad 33 maintains a stable position during work and does not shift or loosen due to the rotation of the adjusting rod 24 or the action of fluid pressure, thereby effectively maintaining the sealing performance. Figure 5 As shown, the pressing block 32 is connected to the outer wall of the pad slot 31 by a bolt. The pad slot 31 is in the shape of a cylinder, with a hole in the middle for installing the air-tight pad 33.
[0027] The valve core 25 is fixed with limit blocks 252 on both sides, and the housing 11 is fixed with limit strip slots 15 on both sides. The limit blocks 252 are movably installed in the limit strip slots 15. The limit blocks 252 are embedded in the limit strip slots 15 to limit the rotation of the valve core 25 when the adjusting rod 24 rotates. When the adjusting rod 24 drives the threaded rod 251 and the threaded hole 241 to cooperate, the valve core 25 only moves up and down without rotating.
[0028] The first channel 12 and the second channel 13 are provided with a butt joint disc 5 on the outside. The butt joint disc 5 is fixed on both sides of the housing 11, and the housing 11 is connected to the butt joint pipe 51 through the butt joint disc 5 and the bolt 4. The butt joint disc 5 is an intermediate piece connecting the housing 11 and the butt joint pipe 51, providing a standardized interface, so that the valve can be quickly and reliably connected to different specifications of pipes, facilitating installation and disassembly.
[0029] The adjusting rod 24 is installed with a wheel disc 6 at the upper end. The wheel disc 6 is fixed to the adjusting rod 24 by a bolt 4. The wheel disc 6 provides a convenient grip and rotation part. By rotating the wheel disc 6, the adjusting rod 24 can be driven to rotate, thereby adjusting the valve core 25 and controlling the opening and closing of the valve and the flow.
[0030] As an embodiment of the utility model: in using low leakage single seat valve, first of adjusting the open and close state of valve through operation wheel disc 6, rotation wheel disc 6 will drive adjusting rod 24 to rotate, adjusting rod 24 is cooperated with the threaded rod 251 of valve core 25 through the threaded hole 241 of its lower end, realizes the lifting movement of valve core 25, and adjusting rod 24 only rotates and does not have up and down displacement, the cooperation of limiting block 252 and limiting strip slot 15 further guarantees that valve core 25 does not rotate in the lifting process, makes its movement more stable,
[0031] Specifically, by setting the threaded hole 241 of the lower end of the adjusting rod 24 and the threaded rod 251 of the upper end of the valve core 25, the adjusting rod 24 only rotates during rotation and does not move up and down, avoiding the longitudinal wear of the air-tight pad 33 caused by frequent lifting during the adjustment process of the traditional single seat valve, thereby effectively prolonging the service life of the air-tight pad 33 and reducing the risk of leakage.
[0032] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.
[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A low-leakage single seat valve comprising a valve body, a regulating mechanism, and a gas-tight mechanism, characterized in that: The valve body upper end is provided with the adjusting mechanism, and the adjusting mechanism is provided with the air-tight mechanism between the valve body; The valve body includes a shell, a first channel is opened at the upper end of the shell, a second channel is opened at the lower end of the shell, and a valve seat is fixed between the first channel and the second channel; The adjusting mechanism includes an adjusting base, the adjusting base is installed on the upper end of the shell through a bolt, a supporting frame is fixed at the upper end of the adjusting base, an adjusting rod is installed in the middle of the supporting frame through a bearing, a valve core is arranged at the lower end of the adjusting rod, the position of the valve core corresponds to the valve seat, a threaded rod is fixed at the upper end of the valve core, a threaded hole is opened at the lower end of the adjusting rod, and the threaded rod is rotatably installed in the threaded hole.
2. A low-leakage single seat valve as defined in claim 1, characterized in that: The air-tight mechanism includes a sealing gasket groove, an air-tight gasket is installed in the sealing gasket groove, and the air-tight gasket is installed outside the adjusting rod.
3. A low-leakage single seat valve as defined in claim 2, wherein: A pressing block is arranged at the upper end of the sealing gasket groove, the lower end of the pressing block is connected with the sealing gasket groove through a bolt, and the pressing block is located at the upper end of the air-tight gasket.
4. A low-leakage single seat valve as defined in claim 1, wherein: Limiting blocks are fixed at both sides of the valve core, limiting strip grooves are fixed in the shell, and the limiting blocks are movably installed in the limiting strip grooves.
5. A low-leakage single seat valve as defined in claim 1, wherein: Butt joints are arranged outside the first channel and the second channel, the butt joints are fixed at both sides of the shell, and the shell is connected with butt pipes through the butt joints and bolts.
6. A low-leakage single seat valve as defined in claim 1, wherein: A wheel disc is installed at the upper end of the adjusting rod, and the wheel disc is fixed with the adjusting rod through a bolt.