Three-eccentric butterfly plate

Abstract

The utility model discloses a triple-eccentric butterfly plate which comprises a butterfly plate body, two shaft sleeves are coaxially arranged on the side portion of the butterfly plate body, the axes of the shaft sleeves deviate from the sealing face of the butterfly plate body and the center line of the butterfly plate body, and the conical axis of the sealing face of the butterfly plate deviates from the center line of the butterfly plate body. Two mounting sleeves are integrally arranged on the side portion of the butterfly plate body and are coaxially arranged, adjusting sleeves are arranged in the mounting sleeves, long circular holes are formed in the adjusting sleeves in a penetrating mode and extend in the direction perpendicular to the butterfly plate body, and the shaft sleeves are arranged in the long circular holes of the corresponding adjusting sleeves in a sliding mode. The shaft sleeve is locked in the long circular hole of the adjusting sleeve through a locking assembly, and the mounting sleeve, the adjusting sleeve and the shaft sleeve are connected together in a linkage mode through a cylindrical pin penetrating in the radial direction. The center position of the shaft sleeve can be adjusted, the machining difficulty of the butterfly plate is reduced, the product percent of pass is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a triple eccentric butterfly plate. Background Art

[0002] A butterfly valve is a valve with a disc-shaped closing member. The disc rotates around the axis of the valve stem to open or close the valve. It mainly serves to cut off and throttle flow in pipelines. With the development of industrial technology, ordinary butterfly valves can no longer meet industrial needs. To meet various working conditions, butterfly valves have evolved through concentric, single eccentric, double eccentric, and triple eccentric versions.

[0003] In the prior art, the disc of a triple-eccentric butterfly valve has two coaxially arranged sleeves on its side. The valve stem passes through the sleeves and is linked to the sleeves via a cylindrical pin. However, due to machining errors, after the valve stem passes through the sleeves of the disc and the disc is installed, the valve is closed. Due to the center deviation of the sleeves, a gap will form between the sealing surface of the disc and the valve seat. This will result in the disc being judged as unqualified and requiring reprocessing. This is not only difficult to produce, but also leads to high production costs due to the low pass rate. Utility Model Content

[0004] The purpose of the utility model is to provide a three-eccentric butterfly plate, which can adjust the center position of the shaft sleeve, reduce the difficulty of butterfly plate processing, improve the product qualification rate, and reduce production costs.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-eccentric butterfly disc, comprising a butterfly disc body, two shaft sleeves coaxially arranged on the side of the butterfly disc body, the axis of the shaft sleeve deviates from the sealing surface of the butterfly disc body, and the axis of the shaft sleeve deviates from the center line of the butterfly disc body, and the conical axis of the butterfly disc sealing surface is inclined to the center line of the butterfly disc body; two mounting sleeves are integrally provided on the side of the butterfly disc body, the two mounting sleeves are coaxially arranged, an adjustment sleeve is provided in the mounting sleeve, an oblong hole is provided through the adjusting sleeve, the oblong hole extends in a direction perpendicular to the butterfly disc body, the shaft sleeve is slidably arranged in the oblong hole of the corresponding adjusting sleeve, and the shaft sleeve is locked in the oblong hole of the adjusting sleeve by a locking assembly, and the mounting sleeve, the adjusting sleeve and the shaft sleeve are linked together by radially piercing cylindrical pins.

[0006] By adopting the above technical solution, since the position of the sleeve is adjustable, the position of the sleeve can be fine-tuned according to design requirements, and then the sleeve can be locked by the locking assembly to eliminate defects caused by processing errors. It can reduce the difficulty of butterfly plate processing, improve product qualification rate, and reduce production costs.

[0007] The utility model is further configured such that a screw hole is respectively opened on both sides of the adjustment sleeve, the two screw holes are coaxially arranged, the locking assembly includes two locking studs, the two locking studs are respectively threadedly connected to the corresponding screw holes, and the inner ends of the locking studs are tightly pressed against the outer wall of the adjustment sleeve.

[0008] By adopting the above technical solution, the position of the shaft sleeve can be fine-tuned by rotating the locking studs on both sides of the adjustment sleeve, and the operation is very simple.

[0009] The utility model is further configured such that the outer end of the locking stud is provided with an inner hexagonal groove.

[0010] By adopting the above technical solution, the locking stud can be rotated by using a hexagonal wrench, and the operation is easy and convenient.

[0011] The utility model is further configured such that two positioning grooves are provided on the outer wall of the shaft sleeve, and the inner ends of the locking studs are embedded in the corresponding positioning grooves.

[0012] By adopting the above technical solution, the inner end of the locking stud is embedded in the positioning groove to position the sleeve, thereby preventing it from rotating during movement and ensuring the reliability of the structure.

[0013] The present invention is further configured such that an elastic pad is sandwiched between the inner end of the positioning groove and the inner end of the locking stud.

[0014] By adopting the above technical solution, when the locking stud abuts against the elastic pad, the elastic pad can provide a directional pre-tightening force for the locking stud, thereby increasing the thread friction between the locking stud and the screw hole, and preventing the locking stud from loosening during use.

[0015] The utility model is further configured such that a pressure ring is respectively provided at the upper and lower ends of the adjustment sleeve, and a clamping flange is provided at the lower end of the pressure ring which extends into the oblong hole. The clamping flange is interference fit with the oblong hole, and the inner end of the clamping flange is tightly pressed against the corresponding end of the shaft sleeve.

[0016] By adopting the above technical solution, after the position adjustment of the sleeve is completed, the upper and lower ends of the sleeve are pressed and positioned by two pressure rings, which can improve the stability of the structure after the sleeve is locked.

[0017] The present invention is further configured such that a slot is provided on the side of the pressing ring for inserting a tool to pry out the pressing ring.

[0018] By adopting the above technical solution, since the clamping flange on the pressure ring and the oblong hole have an interference fit and it is difficult to remove the pressure ring by hand, when disassembling, a tool can be inserted into the slot of the pressure ring to pry out the pressure ring, which is more conducive to the disassembly operation of the pressure ring.

[0019] The present invention is further configured such that an inverted T-shaped groove is provided through the outer end of the cylindrical pin in a radial direction.

[0020] By adopting the above technical solution, when removing the cylindrical pin, a tool can be inserted into the inverted T-shaped groove of the cylindrical pin, and the cylindrical pin can be pulled out to realize the disassembly, maintenance or replacement of the butterfly plate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 A cross-sectional view of the utility model as a whole;

[0023] Figure 3 This is a structural diagram of the butterfly plate main body of the utility model;

[0024] Figure 4 This is a schematic diagram of the matching structure of the adjusting sleeve and the shaft sleeve of the utility model;

[0025] Figure 5 This is an exploded view of the matching structure of the adjusting sleeve and the shaft sleeve of the utility model.

[0026] In the figure: 1. Butterfly plate body; 2. Bushing; 3. Mounting sleeve; 4. Adjusting sleeve; 5. Oblong hole; 6. Cylindrical pin; 7. Screw hole; 8. Locking stud; 9. Hexagon socket; 10. Positioning slot; 11. Elastic pad; 12. Pressing ring; 13. Clamping flange; 14. Slot; 15. Inverted T-slot. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: As shown in the attached Figures 1 to 5The present invention relates to a triple-eccentric butterfly disc, comprising a disc body, two coaxially disposed sleeves on the side of the disc body, the sleeve axes of the sleeves offset from the disc body sealing surface, and the sleeve axes of the sleeves offset from the disc body centerline, with the conical axis of the disc sealing surface being tilted from the disc body centerline; two coaxially disposed mounting sleeves on the side of the disc body, an adjustment sleeve disposed within the mounting sleeve, an oblong hole formed through the adjustment sleeve, the oblong hole being semicircular at both ends and rectangular in the middle, the oblong hole extending perpendicularly to the disc body; the sleeves slidingly disposed within the corresponding oblong holes of the adjustment sleeves, and locked within the oblong holes of the adjustment sleeves by a locking assembly; the mounting sleeves, adjustment sleeves, and sleeves being linked together by radially inserted cylindrical pins. Since the sleeve positions are adjustable, the sleeve positions can be fine-tuned according to design requirements, and the sleeves are then locked by the locking assembly to eliminate defects caused by machining errors. This reduces the difficulty of disc machining, improves product qualification rates, and reduces production costs.

[0029] As attached Figure 4 As shown, the adjustment sleeve is provided with a coaxial screw hole on each side. The locking assembly includes two locking studs, each of which is threaded into a corresponding screw hole. The inner ends of the locking studs abut against the outer wall of the adjustment sleeve. When adjusting the locking studs, the outer ends of the two locking studs are always in the corresponding screw holes. By rotating the locking studs on both sides of the adjustment sleeve, the position of the shaft sleeve can be fine-tuned, which is very simple to operate.

[0030] As attached Figure 4 As shown, the outer end of the locking stud is provided with an inner hexagonal groove. The locking stud can be rotated by using a hexagonal wrench, which is easy and convenient to operate.

[0031] As attached Figure 4 As shown, the outer wall of the sleeve is provided with two positioning grooves, the outer edges of which are chamfered, and the inner ends of the locking studs are embedded in the corresponding positioning grooves. The inner ends of the locking studs embedded in the positioning grooves can position the sleeve, prevent it from rotating during movement, and ensure the reliability of the structure.

[0032] As attached Figure 4 As shown, an elastic pad is sandwiched between the inner end of the positioning groove and the inner end of the locking stud. The elastic pad can be made of silicone. When the locking stud abuts the elastic pad, the elastic pad can provide a directional pre-tightening force for the locking stud, thereby increasing the thread friction between the locking stud and the screw hole, preventing the locking stud from loosening during use.

[0033] As attached Figure 2 and attached Figure 5As shown, the adjustment sleeve is equipped with a pressure ring at each end. The cross-section of the pressure ring is comparable to that of the adjustment sleeve. The lower end of the pressure ring is equipped with a clamping flange that extends into the oblong hole. The clamping flange and the oblong hole have an interference fit, and the inner end of the clamping flange abuts the corresponding end of the sleeve. After the sleeve position is adjusted, the two pressure rings hold the upper and lower ends of the sleeve in place, which can improve the stability of the structure after the sleeve is locked.

[0034] As attached Figure 5 As shown in the figure, the side of the pressing ring is provided with a slot for inserting a tool to pry out the pressing ring. Since the pressing flange on the pressing ring and the oblong hole have an interference fit, it is difficult to remove the pressing ring by hand. When removing the pressing ring, a tool can be inserted into the slot of the pressing ring to pry it out, which is more convenient for removing the pressing ring.

[0035] As attached Figure 2 As shown, the outer end of the cylindrical pin is provided with an inverted T-shaped groove along the radial direction. When removing the cylindrical pin, a tool can be inserted into the inverted T-shaped groove of the cylindrical pin and the cylindrical pin can be pulled out to realize the disassembly, maintenance or replacement of the butterfly plate body.

Claims

1. A triple-eccentric disc, comprising a disc body, two coaxially mounted sleeves on the sides of the disc body, the sleeve axes offset from the disc body sealing surface and the disc body centerline, the conical axis of the disc sealing surface being inclined relative to the disc body centerline; characterized in that: Two mounting sleeves are integrally provided on the side of the butterfly plate body, and the two mounting sleeves are coaxially arranged. An adjusting sleeve is provided in the mounting sleeve, and an oblong hole is provided through the adjusting sleeve. The oblong hole extends in a direction perpendicular to the butterfly plate body. The shaft sleeve is slidably arranged in the oblong hole of the corresponding adjusting sleeve, and the shaft sleeve is locked in the oblong hole of the adjusting sleeve by a locking assembly. The mounting sleeve, the adjusting sleeve and the shaft sleeve are linked together by a radially pierced cylindrical pin.

2. The triple eccentric disc according to claim 1, characterized in that: A screw hole is respectively provided on both sides of the adjustment sleeve, and the two screw holes are coaxially arranged. The locking assembly includes two locking studs, which are respectively threaded into the corresponding screw holes, and the inner ends of the locking studs are tightly pressed against the outer wall of the adjustment sleeve.

3. The triple eccentric disc according to claim 2, characterized in that: The outer end of the locking stud is provided with a hexagonal socket.

4. The triple eccentric disc according to claim 2, characterized in that: Two positioning grooves are provided on the outer wall of the shaft sleeve, and the inner ends of the locking studs are embedded in the corresponding positioning grooves.

5. The triple eccentric disc according to claim 4, characterized in that: An elastic pad is sandwiched between the inner end of the positioning groove and the inner end of the locking stud.

6. The triple eccentric disc according to claim 1, characterized in that: The upper and lower ends of the adjustment sleeve are respectively provided with a pressing ring, and the lower end of the pressing ring is provided with a clamping flange extending into the oblong hole. The clamping flange is interference fit with the oblong hole, and the inner end of the clamping flange is tightly pressed against the corresponding end of the shaft sleeve.

7. The triple eccentric disc according to claim 6, characterized in that: The side of the pressing ring is provided with a slot for inserting a tool to pry out the pressing ring.

8. The triple eccentric disc according to claim 1, characterized in that: An inverted T-shaped groove is provided through the outer end of the cylindrical pin in the radial direction.

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