A diaphragm structure for a fluid valve

Abstract

The utility model discloses a diaphragm structure of fluid valve relates to valve technical field, including valve body, shell, operating mechanism and diaphragm, is equipped with medium flow channel and valve cavity in the valve body, and the valve cavity has valve seat, and operating mechanism drives diaphragm to open and close. The core lies in that diaphragm contains sealing head, piece body, thickening portion and inlaying part, and the outer wall of valve cavity is equipped with inlaying groove and inlaying part adaptation;Sealing head is equipped with convex sealing boss, and the outer ring of boss has cross section " V " type convex ring. Sealing boss forms line - surface double - seal with valve seat, and " V " type convex ring enhances contact pressure, and resists pressure fluctuation and valve seat wear, and adapts high pressure and other rigorous working condition;Inlaying part cooperates with inlaying groove, replaces traditional fixed mode, bears reciprocating deformation stress and prevents loosening;Thickening portion promotes structural strength, reduces the risk of fatigue failure, and realizes fixed and deformation partitioning with inlaying part, and gives consideration to stability and flexibility, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a diaphragm structure for a fluid valve. Background Technology

[0002] Fluid valves, as the core components of media control, are widely used in chemical, hydraulic, and water treatment fields. The diaphragm, as its key sealing element, directly determines the valve's sealing performance, service life, and operational stability through its structural design.

[0003] Existing fluid valve diaphragms mostly employ single or simple composite structures, such as only having a sealing head and an outer ring fixing part, with the sealing head and valve seat contact surfaces often being flat or simple curved surfaces. In practical applications, flat or simple curved surface seals are prone to failure due to medium pressure fluctuations and minor wear of the valve seat, especially under high pressure or corrosive media conditions, resulting in insufficient sealing reliability. At the same time, the outer ring fixing structure of the diaphragm is mostly a simple clamping or bonding, which is prone to loosening under long-term reciprocating deformation of the diaphragm, further exacerbating the sealing risks.

[0004] Therefore, there is an urgent need for a diaphragm design that optimizes the sealing and fixing structures to solve the problems of high risk of sealing failure and insufficient fixing reliability of existing diaphragms. Utility Model Content

[0005] In view of the shortcomings of the prior art, the present invention provides a diaphragm structure for a fluid valve.

[0006] The technical solution adopted by this utility model is: a diaphragm structure for a fluid valve, including a valve body, a shell, an operating mechanism, and a diaphragm. The valve body is provided with a medium flow channel and a valve cavity. A valve seat is provided in the valve cavity. The operating mechanism is used to drive the diaphragm to move away from or towards the valve seat. The diaphragm includes a sealing head, a sheet body of the outer ring of the sealing head, a thickened portion of the outer ring of the sheet body, and an interlocking portion of the outer ring of the thickened portion. An interlocking groove connected to the interlocking portion is provided on the outer wall of the valve cavity. The upper surface of the sealing head has a raised sealing boss. The outer ring of the sealing boss is provided with a convex ring with a "V" shaped cross-section.

[0007] Furthermore, the thickness of the thickened portion is greater than the thickness of the sheet body, which is 1-3 mm thick.

[0008] Furthermore, the operating mechanism includes an operating rod, a knob, a square-hole plate, and a bushing. One end of the operating rod is a lower screw threaded to the screw hole of the sealing head, and the other end is an upper screw threaded to the screw hole of the knob. The square-hole plate and the bushing are coaxially fitted onto the operating rod. A square hole is provided in the middle of the square-hole plate, and a square connecting part adapted to the square hole is provided on the operating rod.

[0009] Furthermore, the outer ring of the fitting groove is provided with an outer surround for covering the outer ring of the square hole circular plate, and the square hole circular plate is provided with a ring of protrusions that abut against the thickened portion.

[0010] Furthermore, the outer shell includes a middle ring, a base, and a top cover. The top cover and the base are respectively disposed at the upper and lower ends of the middle ring. The cross-sections of the middle ring, the base, and the top cover are all matching square or rectangular structures, and fixing holes for fixing the middle ring, the base, and the top cover are provided at their four corners.

[0011] Furthermore, mounting plates extend outward from both sides of the base, and mounting holes are provided on the mounting plates.

[0012] The beneficial effects of this utility model are: 1. Significantly improved sealing performance: The sealing head is equipped with a raised sealing boss, which forms a double seal of line-surface combination when the diaphragm contacts the valve seat. The raised ring on the outer ring of the boss further enhances the sealing contact pressure, which can effectively resist the risk of sealing failure caused by medium pressure fluctuations and minor wear of the valve seat. It is especially suitable for harsh working conditions such as high pressure and corrosive media.

[0013] 2. Enhanced Fixing Reliability: The outer ring of the diaphragm is equipped with an interlocking part that fits into the interlocking groove on the outer wall of the valve cavity. Compared with traditional adhesive fixing methods, the interlocking structure can withstand the stress generated by the reciprocating deformation of the diaphragm, avoiding loosening after long-term use and ensuring sealing stability.

[0014] 3. Structural strength and adaptability optimization: The thickened part added to the outer ring of the sheet can improve the overall structural strength of the diaphragm and reduce the risk of fatigue damage during reciprocating motion; the coordinated design of the fitting part and the thickened part makes the division of labor between the fixed and deformable areas of the diaphragm clear, taking into account both structural stability and motion flexibility, and extending service life.

[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0018] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0019] Figure 4 This is a schematic diagram of the operating lever and the square-hole circular plate.

[0020] Figure 1-4In the middle section: 1. Valve body; 2. Outer shell; 3. Diaphragm; 4. Medium flow channel; 5. Valve cavity; 6. Valve seat; 7. Sealing head; 8. Plate; 9. Thickened part; 10. Fitting part; 11. Fitting groove; 12. Sealing boss; 13. Raised ring; 14. Operating lever; 15. Knob; 16. Square hole round plate; 17. Bushing; 18. Lower screw; 19. Upper screw; 20. Square hole; 21. Square connecting part; 22. Outer enclosure; 23. Raised part; 24. Middle ring; 25. Base; 26. Top cover; 27. Fixing hole; 28. Mounting plate; 29. ​​Mounting hole. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0023] This invention provides a diaphragm structure for a fluid valve.

[0024] In this embodiment, refer to Figure 1-4 The diaphragm structure of the fluid valve includes a valve body 1, a housing 2, an operating mechanism, and a diaphragm 3. The valve body is provided with a medium flow channel 4 and a valve cavity 5. The valve cavity 5 is provided with a valve seat 6. The operating mechanism is used to drive the diaphragm to move away from or towards the valve seat. The diaphragm includes a sealing head 7, a sheet body 8 on the outer ring of the sealing head 7, a thickened portion 9 on the outer ring of the sheet body 8, and a fitting portion 10 on the outer ring of the thickened portion 9. The outer wall of the valve cavity is provided with a fitting groove 11 that connects with the fitting portion. The upper surface of the sealing head has a raised sealing boss 12. The outer ring of the sealing boss 12 is provided with a raised ring 13 with a "V" shaped cross-section.

[0025] In the above technical solution, the diaphragm is segmented into a sealing head, a sheet body, a thickened section, and a fitting section, forming a functional zone of "sealing-deformation-strengthening-fixation". The fitting section adapts to the valve cavity's fitting groove to achieve circumferential positioning of the diaphragm. The sealing boss of the sealing head forms a line contact seal with the valve seat, and the raised ring further increases the sealing contact pressure and sealing redundancy. This enhances sealing reliability, resists pressure fluctuations and valve seat wear, and improves resistance to deformation and loosening. The thickened section strengthens the structural strength, extends fatigue life, and adapts to multiple operating conditions.

[0026] Specifically, the thickness of the thickened portion is greater than the thickness of the sheet body, which is 1-3 mm thick.

[0027] In this embodiment, the thinness of the sheet ensures flexible deformation during operation and avoids poor sealing due to excessive rigidity; the thickened part enhances the compatibility strength with the fitting part and the fixing structure, and the 1-3mm sheet thickness balances deformation efficiency and structural stability, avoiding damage due to excessive thinness or jamming due to excessive thickness.

[0028] Specifically, the operating mechanism includes an operating rod 14, a knob 15, a square-hole round plate 16, and a bushing 17. One end of the operating rod is a lower screw 18 that is threadedly connected to the screw hole of the sealing head, and the other end is an upper screw 19 that is threadedly connected to the screw hole of the knob. The square-hole round plate and the bushing are coaxially fitted onto the outside of the operating rod. A square hole 20 is provided in the middle of the square-hole round plate, and a square connecting part 21 adapted to the square hole is provided on the operating rod.

[0029] In this embodiment, the threaded drive enables manual adjustment of the diaphragm to adapt to different sealing pressure requirements; the bushing improves the smoothness of movement, and the overall structure simplifies the transmission link, reducing the risk of operational jamming.

[0030] Specifically, the outer ring of the fitting groove is provided with an outer surround 22 for covering the outer ring of the square hole circular plate, and the square hole circular plate is provided with a protrusion 23 that abuts against the thickened part.

[0031] In this embodiment, the outer enclosure prevents the square hole circular plate from shifting radially; the protrusion and the thickened portion abut against each other to press and hold the fitting portion within the fitting groove, thereby improving the sealing effect and avoiding insufficient sealing pressure caused by transmission loss.

[0032] Specifically, the outer shell includes a middle ring 24, a base 25, and a top cover 26. The top cover and the base are respectively located at the upper and lower ends of the middle ring. The cross-sections of the middle ring, the base, and the top cover are all matching square or rectangular structures, and fixing holes 27 are provided at the four corners for fixing the middle ring, the base, and the top cover together.

[0033] In this embodiment, the outer shell adopts a three-section splicing structure. The middle ring, base, and top cover are fixed together by corner fixing holes and bolts. The planar fit of the square structure improves assembly accuracy, and the corner fixing ensures uniform force distribution. The middle ring, base, and top cover are all oriented by cross-section, allowing for stacking and adaptation. The three-section design facilitates disassembly and maintenance, and has an aesthetically pleasing appearance.

[0034] Specifically, mounting plates 28 extend outward from both sides of the base, and mounting holes 29 are provided on the mounting plates 28.

[0035] In this embodiment, the base extends to the mounting plate and has mounting holes. The valve body is fixed to the equipment bracket or workbench by the mounting plate, and the bolt connection of the mounting holes is used to achieve detachable fixing.

[0036] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A diaphragm structure for a fluid valve, comprising a valve body, a housing, an operating mechanism, and a diaphragm, wherein the valve body has a medium flow channel and a valve cavity, the valve cavity has a valve seat, and the operating mechanism is used to drive the diaphragm to move away from or towards the valve seat, characterized in that: The diaphragm includes a sealing head, a sheet body of the outer ring of the sealing head, a thickened portion of the outer ring of the sheet body, and an interlocking portion of the outer ring of the thickened portion. The outer wall of the valve cavity is provided with an interlocking groove that connects with the interlocking portion. The upper surface of the sealing head has a raised sealing boss, and the outer ring of the sealing boss is provided with a convex ring with a "V" shaped cross-section.

2. The diaphragm structure of the fluid valve according to claim 1, characterized in that: The thickness of the thickened portion is greater than the thickness of the sheet body, which is 1-3 mm thick.

3. The diaphragm structure of the fluid valve according to claim 1, characterized in that: The operating mechanism includes an operating rod, a knob, a square-hole plate, and a bushing. One end of the operating rod is a lower screw threaded to the screw hole of the sealing head, and the other end is an upper screw threaded to the screw hole of the knob. The square-hole plate and the bushing are coaxially fitted onto the operating rod. A square hole is provided in the middle of the square-hole plate, and a square connecting part adapted to the square hole is provided on the operating rod.

4. The diaphragm structure of the fluid valve according to claim 3, characterized in that: The outer ring of the fitting groove is provided with an outer surround for covering the outer ring of the square hole circular plate, and the square hole circular plate is provided with a ring of protrusions that abut against the thickened portion.

5. The diaphragm structure of the fluid valve according to claim 1, characterized in that: The outer shell includes a middle ring, a base, and a top cover. The top cover and the base are respectively located at the upper and lower ends of the middle ring. The cross-sections of the middle ring, the base, and the top cover are all matching square or rectangular structures, and fixing holes for fixing the middle ring, the base, and the top cover are provided at the four corners.

6. The diaphragm structure of the fluid valve according to claim 5, characterized in that: The base has mounting plates extending outward from both sides, and the mounting plates are provided with mounting holes.

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