A floating ball water replenishing valve and an evaporative cooling device using the same
By using the axial sliding fit between the float rod and the sleeve and the threaded rod limiting design, combined with the three-stage connecting rod and gear adjustment assembly, high-precision liquid level control of the float valve is achieved, solving the problems of insufficient adjustment accuracy and structural instability in the existing technology. It is suitable for high-precision water level control scenarios such as evaporative cooling equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EXTEK ENERGY EQUIP ZHEJIANG
- Filing Date
- 2025-05-23
- Publication Date
- 2026-07-28
AI Technical Summary
Existing float valve regulating mechanisms suffer from insufficient regulating accuracy, structural instability, and inconvenient maintenance in high-precision water level control scenarios, especially in evaporative cooling equipment where they are difficult to meet precise control requirements.
By employing an axial sliding fit between the float rod and the sleeve, combined with the design of a threaded rod and a limit nut, continuous stepless adjustment and precise locking of the float position can be achieved. In conjunction with a three-stage linkage and gear adjustment assembly, a dual adjustment mechanism is formed to achieve fine control of the float height.
The adjustment accuracy of the float valve has been improved to the millimeter level or even sub-millimeter level. It has good structural stability and is easy to operate. It solves the shortcomings of traditional float valves in high-precision water level control and is suitable for application scenarios with high requirements for liquid level control accuracy.
Smart Images
Figure CN224566828U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of liquid level control devices, and in particular to a float water supply valve and an evaporative cooling device using the float water supply valve. Background Technology
[0002] Float valves, as a common liquid level control device, are widely used in equipment such as water tanks and condensers. They open and close by moving a float along the liquid level, enabling automatic water replenishment and liquid level regulation. In existing technologies, the regulating mechanism of float valves mostly adopts a mechanical design, but this generally suffers from insufficient regulating accuracy, making it difficult to meet the needs of high-precision water level control scenarios. Especially in applications such as evaporative cooling equipment where high water level control accuracy is required, the existing regulating mechanisms of float valves often fail to meet the requirements for precise control.
[0003] Taking the adjustable float valve disclosed in Chinese utility model patent CN214119120U as an example, it adjusts the float position by the meshing angle of the first fixed gear disc and the second fixed gear disc. Although this design can achieve preliminary adjustment of the float height, it has obvious technical defects due to the use of gear meshing angle changes as the adjustment method. First, the gear meshing angle adjustment step is large, which can only achieve coarse adjustment of the float height and cannot perform fine-tuning. Second, this adjustment method lacks a precise positioning mechanism, and positional deviation is prone to occur during long-term use, resulting in a decrease in water level control accuracy. In addition, the adjustment mechanism of existing float valves is often complex in structure, inconvenient to maintain, and difficult to adapt to the dynamic liquid level control requirements under complex working conditions.
[0004] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention
[0005] To address the aforementioned problems, the purpose of this utility model is to provide a float water supply valve and an evaporative cooling device, which has advantages such as high adjustment accuracy, stable and reliable structure, and convenient maintenance.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] This application provides a float-type water supply valve, the technical solution of which is as follows: A float-type water supply valve includes a float, a water supply valve body, a plug disposed within the water supply valve body, a valve stem assembly movably disposed on the water supply valve body and connected to the plug, and an adjusting rod connecting the valve stem assembly and the float. When the float rises and falls with the liquid level, it drives the plug to move via the adjusting rod and the valve stem assembly, thereby controlling the opening and closing of the water supply valve body. A float rod is fixedly connected to the float, and a sleeve is provided at the end of the adjusting rod. The sleeve is fitted onto the float rod and can move and be fixed along the axial direction of the float rod to adjust the position of the float relative to the adjusting rod.
[0008] This technical solution achieves axial adjustment of the float position through the sleeve connection between the float rod and the sleeve. The float rod is fixed to the float, and the sleeve can slide along the float rod and be fixed in place. By changing the axial position of the sleeve on the float rod, the relative distance between the float and the adjusting rod can be directly adjusted. This mechanical connection method breaks through the precision limitations of traditional gear meshing adjustment. The axial movement of the sleeve and the float rod can achieve continuous stepless adjustment, and a stable mechanical connection strength can be maintained after fixing.
[0009] Furthermore, this application proposes that the float rod is a threaded rod, the sleeve is movably fitted onto the threaded rod, and a limit nut is connected to at least one side of the sleeve. The limit nut rotates relative to the threaded rod to adjust the axial position of the sleeve and the threaded rod. The float rod adopts a threaded rod structure, the sleeve is movably fitted onto the threaded rod, and the limit nut is threadedly engaged with the threaded rod. The threaded rod structure provides a reference for axial position adjustment, the movable sleeve realizes the degree of freedom of axial movement, and the limit nut achieves precise locking of the axial position through threaded rotation. The three components work together to form a threaded fine-tuning mechanism. By rotating the limit nut, the axial position of the sleeve on the threaded rod can be precisely controlled, thereby achieving fine adjustment of the float height.
[0010] Furthermore, this application proposes that limit nuts are provided on the threaded rods on both sides of the sleeve, and the sleeve is clamped by the limit nuts on both sides. The axial position of the sleeve and the threaded rod is adjusted by rotating the limit nuts on both sides. The float rod adopts a threaded rod structure, and the sleeve is movably sleeved on the threaded rod and clamped by the limit nuts on both sides. The cooperation between the threaded rod and the limit nuts can realize precise fine adjustment of the sleeve position, and the symmetrical arrangement of the limit nuts on both sides enhances the clamping stability. This structure achieves fine adjustment of the axial position of the sleeve by rotating the limit nuts, thereby accurately controlling the position of the float.
[0011] Furthermore, this application proposes that the float rod is a threaded rod, and the sleeve is threaded onto the threaded rod. The float rod is rotated to adjust its axial position relative to the sleeve. This technical solution, by designing the float rod as a threaded rod, allows the sleeve to be threaded onto the float rod. This structure allows for precise adjustment of the axial position between the sleeve and the float rod by rotating the float rod. The threaded mechanical structure provides a more refined position adjustment capability.
[0012] Furthermore, this application proposes that the valve stem assembly includes: a first connecting rod, the inner end of which is hinged to the outer wall of the water supply valve body; the adjusting rod is rotatably mounted on the outer end of the first connecting rod via a gear adjusting assembly to achieve circumferential rotation and positioning; a valve stem, which passes through the side wall of the water supply valve body and has its inner end hinged to the water supply valve body to form a lever structure; and a second connecting rod, which connects the outer ends of the first connecting rod and the valve stem. When the float rises and falls with the liquid level, it drives the valve stem to move with its inner end as the center via the adjusting rod, the first connecting rod, and the second connecting rod, thereby driving the plug to move. The valve stem assembly adopts a three-stage linkage structure: the first connecting rod is rotatably connected to the adjusting rod via the gear adjusting assembly to achieve coarse adjustment of the float position; the valve stem and the water supply valve body form a lever fulcrum structure, and the movement of the first connecting rod is transmitted to the valve stem via the second connecting rod; this structure achieves coarse adjustment of the float angle via the gear adjusting assembly, while simultaneously amplifying the displacement of the float using the lever principle, so that the plug obtains sufficient opening and closing stroke.
[0013] Furthermore, this application also proposes that the gear adjusting assembly includes a first gear disk disposed on the outer end of the first connecting rod and a second gear disk disposed on the inner end of the adjusting rod. The first gear disk and the second gear disk are coaxially connected, mesh with each other based on preload, and can rotate relative to each other under the action of external force.
[0014] Furthermore, this application also proposes an evaporative cooling device, including the aforementioned float water supply valve.
[0015] As can be seen from the above, the float water supply valve and evaporative cooling device provided in this application achieve precise control of the float position through an adjustable float rod and sleeve structure. Combined with the optimized valve stem assembly design, it solves the problems of insufficient adjustment accuracy and unstable structure in the prior art, and has the advantages of high adjustment accuracy, stable and reliable structure, and convenient maintenance. Attached Figure Description
[0016] Figure 1 This is a structural schematic diagram of a float-type water supply valve provided in this application.
[0017] Figure 2 This is a schematic diagram of a gear adjustment assembly provided in this application. Detailed Implementation
[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.
[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example 1
[0023] like Figure 1 and 2As shown, this embodiment relates to a float-type water supply valve 1, including a float 1, a water supply valve body 4, a plug disposed within the water supply valve body 4, a valve stem assembly movably disposed on the water supply valve body 4 and connected to the plug, and an adjusting rod 7 connecting the valve stem assembly and the float 1. When the float 1 rises and falls with the liquid level, it drives the plug to move via the adjusting rod 7 and the valve stem assembly, thereby controlling the opening and closing of the water supply valve body 4. A float rod 2 is fixedly connected to the float 1. A sleeve 3 is provided at the end of the adjusting rod 7. The sleeve 3 is sleeved on the float rod 2 and can move and be fixed along the axial direction of the float rod 2 to adjust the position of the float 1 relative to the adjusting rod 7. This technical solution replaces the traditional gear angle adjustment with an axial sliding mechanism between the float rod 2 and the sleeve 3, thereby achieving continuous stepless adjustment of the float 1 position. The distance the sleeve 3 moves along the float rod 2 directly determines the relative position of the float 1 and the adjusting rod 7, thereby precisely controlling the opening and closing liquid level of the water supply valve 4. Compared to existing technologies, this design avoids the limitations of step-by-step gear meshing adjustment, achieving higher precision liquid level control through a mechanical sliding structure while maintaining the rigid connection strength of the transmission mechanism. The rigid linkage system formed by float 1, float rod 2, sleeve 3, and adjusting rod 7 can stably transmit motion to the valve stem assembly when the liquid level changes, ensuring a precise correspondence between the plug action and the liquid level height.
[0024] like Figure 1 In the illustrated implementation, the float rod 2 adopts a threaded rod structure, the sleeve 3 is movably fitted onto the threaded rod, and the limiting nut 8 is threadedly engaged with the threaded rod. The threaded rod structure provides a reference for axial position adjustment, the sleeve 3 movably fits onto the threaded rod to achieve axial movement freedom, and the limiting nut 8 achieves precise axial position locking through threaded rotation. These three components work together to form a threaded fine-tuning mechanism. By rotating the limiting nut 8, the axial position of the sleeve 3 on the threaded rod can be precisely controlled, thereby achieving fine adjustment of the float 1 height. Specifically, the inner diameter of the sleeve 3 is slightly larger than the outer diameter of the threaded rod, forming a clearance fit to ensure smooth axial movement. The limiting nut 8 can be a hexagonal nut or a wing nut, with the wing nut facilitating manual operation. As a preferred embodiment, the contact surface between the limiting nut 8 and the sleeve 3 can be provided with anti-slip textures or rubber pads to enhance locking stability. This technical solution converts rotational motion into axial displacement through the precision transmission characteristics of the threaded pair, and utilizes the self-locking characteristics of the thread to achieve position fixation. Compared with existing gear meshing adjustment methods, the threaded fine-tuning mechanism has the following advantages: significantly improved adjustment accuracy, enabling millimeter-level or even sub-millimeter-level adjustment of the float 1 position. Simple and reliable structure, requiring no complex transmission components. Convenient operation, requiring only rotation of the limit nut 8 to complete the adjustment. Good stability, the threaded self-locking effectively prevents positional deviation during operation. Therefore, this solution effectively solves the technical problems of excessively large step sizes and insufficient accuracy in traditional adjustment methods, making it particularly suitable for applications requiring high water level control accuracy.
[0025] In a further implementation, in the float valve 4, limit nuts 8 are provided on the threaded rods on both sides of the sleeve 3, and the limit nuts 8 clamp the sleeve 3. The axial position of the sleeve 3 and the threaded rod is adjusted by rotating the limit nuts 8. This technical solution achieves precise fine-tuning of the sleeve 3 position through the symmetrical clamping structure of the double limit nuts 8. When either limit nut 8 is rotated, the sleeve 3 can generate axial displacement along the threaded rod, and the displacement is linearly related to the rotation angle of the nut. The coordinated adjustment of the limit nuts 8 on both sides can eliminate the eccentric force generated by unilateral adjustment and improve positional stability through mutual locking. Compared with the prior art, this structure improves the position adjustment accuracy of the float 1 to the ±1mm level, and no parts need to be disassembled during the adjustment process, significantly improving the ease of operation. The self-locking characteristic of the threaded drive can effectively prevent the displacement of the sleeve 3 caused by water level fluctuations, solving the problem of inaccurate liquid level control caused by loose adjustment mechanism in traditional float valves.
[0026] In another embodiment, the float rod 2 is a threaded rod, and the sleeve 3 is threaded onto the threaded rod; the float rod 2 is rotated to adjust its axial position relative to the sleeve 3. Specifically, the threaded fit between the float rod 2 and the sleeve 3 can be a standard thread such as a metric thread, an imperial thread, or a trapezoidal thread. The inner wall of the sleeve 3 is machined with an internal thread that matches the threaded rod, and the two form a transmission connection through the threaded pair. Thus, when the float rod 2 is rotated, the sleeve 3 can produce a precise displacement along the axial direction of the threaded rod. Furthermore, a rotating handle or hexagonal head can be provided at the end of the threaded rod for easy manual adjustment. This technical solution achieves precise adjustment of the float 1 position through a threaded transmission mechanism. The fit between the threaded rod and the sleeve 3 converts rotational motion into linear displacement. Due to the large transmission ratio of the threaded pair, even a small angle of rotation can produce sub-millimeter-level axial displacement, thereby significantly improving adjustment accuracy. Compared to the gear meshing angle adjustment method in the prior art, threaded adjustment eliminates the error caused by gear meshing clearance and has a self-locking characteristic, effectively preventing position deviation after adjustment. Therefore, this design not only solves the problem of insufficient adjustment accuracy of traditional float valves, but also ensures the stability of water level control through mechanical self-locking characteristics, making it particularly suitable for applications with high requirements for liquid level control accuracy, such as evaporative cooling equipment.
[0027] In another alternative embodiment, the engagement between the float rod 2 and the sleeve 3 can be achieved in the following ways: the float rod 2 is a smooth rod, and the sleeve 3 is axially fixed by a set screw. Alternatively, the float rod 2 is a rack structure, and the sleeve 3 has a built-in elastic buckle that engages with the rack for positioning. Further, the float rod 2 can also be designed as a polygonal cross-section rod, and the inner hole of the sleeve 3 matches the polygonal cross-section to prevent rotation. As a preferred embodiment, the float rod 2 and the sleeve 3 use a clearance fit, achieving temporary fixation after stepless adjustment through friction, and locking in the final position with threaded fasteners.
[0028] In a further embodiment, the valve stem assembly includes: a first connecting rod 61, the inner end of which is hinged to the outer wall of the water supply valve body 4; an adjusting rod 7 is rotatably mounted on the outer end of the first connecting rod 61 via a gear adjusting assembly 9 to achieve circumferential rotation and positioning; a valve stem 62, which passes through the side wall of the water supply valve body 4 and has its inner end hinged to the water supply valve body 4 to form a lever structure; and a second connecting rod 63, which connects the outer ends of the first connecting rod 61 and the valve stem 62. When the float 1 rises and falls with the liquid level, the adjusting rod 7, the first connecting rod 61, and the second connecting rod 63 drive the valve stem 62 to perform lever motion with its inner end as the center, thereby driving the plug to move. This technical solution, through the synergistic action of the three-stage connecting rod and the gear adjusting assembly 9, converts the rising and falling motion of the float 1 into the lever motion of the valve stem 62. The gear adjusting assembly 9 allows the adjusting rod 7 to rotate circumferentially relative to the first connecting rod 61, achieving a coarse adjustment of the initial angle of the float 1. The first link 61 and the second link 63 amplify and transmit the displacement of the float 1 to the valve stem 62, using the lever principle to ensure the plug has sufficient opening and closing stroke. Compared with existing technologies, this structure retains the positioning accuracy advantage of gear meshing while amplifying the minute displacement of the float 1 through multi-stage links, thus solving the problem of insufficient adjustment accuracy in traditional float valves. Simultaneously, the force transmission path of the three-stage links is clear, avoiding mechanical losses caused by complex transmission structures.
[0029] like Figure 2 As shown, the gear adjustment assembly 9 of the float water supply valve 4 includes a first gear 91 fixed to the outer end of the first connecting rod 61 and a second gear 92 fixed to the inner end of the adjusting rod 7. The first gear 91 and the second gear 92 are coaxially connected to achieve power transmission. They maintain a meshing state under the action of preload, while allowing relative rotation under the action of external force. Specifically, the first gear 91 can be made of quenched 45# steel with an involute tooth profile. The second gear 92 is made of the same material, and the meshing surfaces of the two are ground to ensure contact accuracy. The preload is achieved by a disc spring or a compression spring, and the spring stiffness coefficient is controlled within a suitable range. As another embodiment, the preload adjustment can be achieved by a threaded tightening structure, for example, by setting an adjusting bolt on the back of the first gear 91, and controlling the meshing pressure by the degree of tightening.
[0030] This technical solution achieves precise indexing of angle adjustment through the meshing structure of the double-toothed discs, where the self-locking effect generated by the preload prevents loosening during operation. When it is necessary to adjust the initial position of the float 1, an external force is applied to rotate the second toothed disc 92 relative to the first toothed disc 91. Due to the gear meshing transmission ratio, the circumferential displacement of the adjusting rod 7 is converted into an angle change, thereby achieving a rough adjustment of the height of the float 1.
[0031] The valve stem assembly, plug, and gear adjusting assembly 9 in the above scheme are not explained in detail in the drawings. Please refer to Chinese Patent No. CN214119120U cited in the background section.
[0032] Therefore, the above technical solution first achieves coarse adjustment of the float 1's position through the gear adjustment assembly 9, and then precisely adjusts the position of the float 1 by coordinating the axial adjustable connection between the float rod 2 and the sleeve 3, forming a dual adjustment mechanism. The two mechanisms work together to precisely control the position of the float 1. The valve stem assembly uses a lever structure to convert the movement of the float 1 into the action of the plug, and the linkage design of the first connecting rod 61 and the second connecting rod 63 ensures efficient force transmission. Compared with existing technologies, this solution, through optimized combination of mechanical structures, simultaneously meets the needs of coarse adjustment and precise fine adjustment, effectively improving the water level control accuracy and solving the technical problem of insufficient adjustment accuracy of the float valve. Example 2
[0033] Furthermore, this application also proposes an evaporative cooling device, the condenser of which includes the float-type water supply valve 4 described in Example 1. This technical solution achieves precise adjustment of the initial height of the float 1 through an adjustable connection structure between the float rod 2 and the sleeve 3. Combined with a lever transmission structure and a gear adjustment assembly 9, the displacement of the float 1 is amplified and precisely transmitted to the plug, thereby improving the control sensitivity of the water supply valve 4. Compared with the prior art, this solution solves the problem of insufficient liquid level control accuracy in evaporative cooling devices, achieving stable and precise liquid level control through the synergistic effect of mechanical structures.
[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.
Claims
1. A float-type water supply valve, comprising a float (1), a water supply valve body (4), a plug disposed within the water supply valve body (4), a valve stem assembly movably disposed on the water supply valve body (4) and connected to the plug, and an adjusting rod (7) connecting the valve stem assembly and the float (1); wherein the float (1) drives the plug to move via the adjusting rod (7) and the valve stem assembly when the liquid level rises and falls, thereby controlling the opening and closing of the water supply valve body (4); characterized in that: A float rod (2) is fixedly connected to the float (1). A sleeve (3) is provided at the end of the adjusting rod (7). The sleeve (3) is sleeved on the float rod (2) and can move and be fixed along the axial direction of the float rod (2) to adjust the position of the float (1) relative to the adjusting rod (7).
2. The ball float fill valve of claim 1, wherein: The float rod (2) is a threaded rod, and the sleeve (3) is movably sleeved on the threaded rod. At least one side of the sleeve (3) is connected to a limit nut (8), and the limit nut (8) rotates relative to the threaded rod to adjust the axial position of the sleeve (3) and the threaded rod.
3. The ball float fill valve of claim 2, wherein: Limiting nuts (8) are provided on the threaded rods on both sides of the sleeve (3), and the limiting nuts (8) on both sides clamp the sleeve (3); the axial position of the sleeve (3) and the threaded rod is adjusted by rotating the limiting nuts (8) on both sides.
4. The ball float fill valve of claim 1, wherein: The float rod (2) is a threaded rod, and the sleeve (3) is threaded onto the threaded rod; the float rod (2) is rotated to adjust its axial position relative to the sleeve (3).
5. A ball float feed valve according to claim 2 or 3 or 4 wherein: The valve stem assembly includes: The first connecting rod (61) has its inner end hinged to the outer wall of the water supply valve body (4). The adjusting rod (7) is rotatably set on the outer end of the first connecting rod (61) through the gear adjusting assembly (9) to achieve circumferential rotation and positioning. The valve stem (62) passes through the side wall of the water supply valve body (4) and its inner end is hinged to the water supply valve body (4) to form a lever structure; The second link (63) connects the outer end of the first link (61) and the valve stem (62); When the float (1) rises and falls with the liquid level, it drives the valve stem (62) to make lever movements with its inner end as the center through the adjusting rod (7), the first connecting rod (61), and the second connecting rod (63), thereby driving the plug to move.
6. The ballcock as defined in claim 5 wherein: The gear adjustment assembly (9) includes a first gear disk (91) disposed on the outer end of the first connecting rod (61) and a second gear disk (92) disposed on the inner end of the adjustment rod (7); the first gear disk (91) and the second gear disk (92) are coaxially connected, mesh with each other based on the preload, and can rotate relative to each other under the action of external force.
7. An evaporative cooling device, characterized by: Includes the float-type water supply valve as described in any one of claims 1 to 6.