一种组合浮球阀
By combining the design of the float valve with the lower free float and the force-saving lever assembly, along with the elastic sealing layer and polyurethane foam, the problems of large size and easy steam leakage of existing lever float steam traps are solved, thus achieving equipment stability and convenient transportation. It is suitable for conveying large flow rates of condensate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANTAI YITONGDA STEAM ENERGY SAVING EQUIP CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lever float steam traps are bulky, prone to steam leakage, prone to sealing failure, and have poor adaptability to large flow rates under low pressure differential conditions. Furthermore, they have complex structures and are difficult to manufacture, making it difficult to meet the continuous production needs of industrial production.
The valve adopts a combination float valve, including a lower free float, an upper float, a support base, and a force-saving lever assembly. The lower free float uses the annular sealing surface as a fulcrum, combined with an elastic sealing layer and polyurethane foam, to ensure that the distance between the steam passage and the sealing surface is greater than 5cm. The lever assembly is connected to the pin shaft through a U-shaped bracket for easy disassembly and assembly. The cage-type float frame prevents the upper float from shifting, and the split-type guide rod facilitates transportation.
This design solves the problem of large valve size, prevents steam leakage, improves sealing performance and ease of transportation, ensures the stability and reliability of the equipment, and is suitable for long-distance transportation.
Smart Images
Figure CN224515962U_ABST
Abstract
Claims
1. A combined float valve comprising a valve body (1) having a condensate passage (11) and a drain opening (12) formed therein, characterized in that: The drain outlet (12) is provided with a lower free float ball (2) for sealing the drain outlet (12). The valve body (1) is provided with an upper float ball (3) located directly above the lower free float ball (2). The valve body (1) is welded and fixed with a support seat (4). A lever assembly is rotatably connected to the support seat (4). One end of the lever assembly is detachably connected to the top of the upper float ball (3), and the other end extends to the top of the lower free float ball (2) and is integrally formed with a pressure block (53) for pressing down the lower free float ball (2). The bottom of the lower free float ball (2) is provided with an annular sealing surface (21) adapted to the inner wall of the drain outlet (12). The valve body (1) is also provided with an independent steam channel (13). The vertical distance between the outlet end of the steam channel (13) and the annular sealing surface (21) of the lower free float ball (2) is not less than 5cm to avoid steam directly contacting the sealing surface and causing leakage.
2. A combined float valve according to claim 1, characterized in that: The lever assembly includes a lever body (5) and a rotating shaft (41) fixed to the top of the support base (4). The lever body (5) has a shaft hole in the middle that is adapted to the rotating shaft (41). A deep groove ball bearing is installed in the shaft hole. The lever body (5) is rotatably connected to the rotating shaft (41) through the deep groove ball bearing to form a force-saving lever structure. A U-shaped retainer (51) is provided at one end of the lever body (5) near the upper float (3). The two sides of the U-shaped retainer (51) The walls are provided with pin holes. The top of the upper float (3) is integrally formed with a cylindrical connecting column (31) that is adapted to the U-shaped card seat (51). The connecting column (31) is provided with a through hole aligned with the pin hole. The connecting column (31) is fixed in the U-shaped card seat (51) by passing a pin shaft (52) through the pin hole and the through hole. The pressure block (53) has an inner arc groove structure. The radius of curvature of the arc groove is consistent with the radius of curvature of the outer surface of the lower free float (2).
3. A combined float valve according to claim 2, characterized in that: The lower free-floating ball (2) has an elastic sealing layer wrapped around its annular sealing surface (21). The elastic sealing layer is made of nitrile rubber resistant to 150°C, and its thickness is 1-2 mm. The outer edge of the sealing layer extends 0.5-1 mm beyond the outer edge of the annular sealing surface (21). The lower free-floating ball (2) has a hollow structure, forming a sealed hollow cavity inside. The hollow cavity is filled with a material with a density not greater than 0.1 g / cm³. 3 The lightweight polyurethane foam is bonded to the inner wall of the lower free-floating ball (2) with glue.
4. A combination float valve according to claim 1 wherein: The valve body (1) is provided with a cage-type float frame (6) located outside the upper float (3). The cage-type float frame (6) is composed of horizontal support rods and vertical support rods welded together. The two ends of the horizontal support rods are welded and fixed to the inner wall of the valve body (1). A gap of 5-8mm is left between the inner wall of the cage-type float frame (6) and the outer surface of the upper float (3). Two symmetrically distributed hinged supports (62) are welded to the top of the cage-type float frame (6). The hinged supports (62) are fixedly connected to the top inner wall of the valve body (1) by bolts. A transparent observation window (63) is also installed on one of the horizontal support rods of the cage-type float frame (6). The transparent observation window (63) is made of acrylic material.
5. A combined float valve according to claim 4, characterized in that: The cage-type float frame (6) has a T-shaped guide groove (61) on the inner wall of the vertical support rod. The outer surface of the upper float (3) is integrally formed with a T-shaped protrusion (32) that matches the T-shaped guide groove (61). The length direction of the T-shaped protrusion (32) is parallel to the axis of the upper float (3), and the T-shaped protrusion (32) is slidably connected in the T-shaped guide groove (61) to prevent the upper float (3) from shifting laterally during the up and down movement. The horizontal support rod and the vertical support rod of the cage-type float frame (6) are both made of 304 stainless steel, and the welded joints are polished to avoid corrosion.
6. A combination float valve according to claim 1 wherein: A split-type guide rod (7) is provided below the drain outlet (12) of the valve body (1). The split-type guide rod (7) includes a first rod body (71) and a second rod body (72). One end of the first rod body (71) is welded and fixed to the outer wall of the valve body (1), and the outer surface of the other end is provided with an external thread. One end of the second rod body (72) is provided with an extension joint (73). One end of the extension joint (73) is provided with an internal thread hole that matches the external thread of the first rod body (71), and the other end is connected to the second rod body (72). 72) The first rod (71) and the extension joint (73) are connected by an annular rubber sealing ring (74). The inner diameter of the sealing ring (74) is the same as the outer diameter of the first rod (71), and the outer diameter is the same as the outer diameter of the extension joint (73). The length of the second rod (72) is greater than the diameter of the upper float (3). The end of the second rod (72) away from the extension joint (73) is integrally formed with an arc-shaped guide head (75). The outlet direction of the arc-shaped guide head (75) is inclined downward at 30-45°.