CN219310670U

CN219310670U - Processing tool for sealing surface of three-eccentric butterfly valve

Info

Publication number: CN219310670U
Application number: CN202223354384.6U
Authority: CN
Inventors: 郭建辉; 孙宏; 刁文雄
Original assignee: Jiangsu Jiangheng Valves Co ltd
Current assignee: Jiangsu Jiangheng Valves Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-07-07
Anticipated expiration: 2032-12-14

Abstract

The utility model provides a processing tool for a sealing surface of a three-eccentric butterfly valve, which comprises an inclined tire, a positioning plate, a workpiece, a lifting ring screw, a flat key and an inner hexagon screw, wherein the top end of the inclined tire is in threaded connection with the positioning plate through four inner hexagon screws, the top end of the inclined tire is provided with a flat key long groove, the flat key is arranged in a key groove at the bottom of the positioning plate and is matched with the flat key long groove at the top of the inclined tire for positioning, the top end of the positioning plate is used for positioning the workpiece through a spigot, and one side of the positioning plate is in threaded connection with the lifting ring screw. According to the positioning plate, through positioning of the flat key and the inner hexagon screw and combination of the spigot on the positioning plate and inner circle matching of the flange sealing surface, consistency of processing size of the butterfly valve sealing surface can be ensured, and errors caused by manual adjustment of the limiting block are avoided.

Description

Processing tool for sealing surface of three-eccentric butterfly valve

Technical Field

The utility model belongs to the technical field of machining of valve bodies of three-eccentric butterfly valves, and relates to a machining tool for sealing surfaces of three-eccentric butterfly valves.

Background

The triple offset butterfly valve is based on a double offset butterfly valve, and is characterized in that the central axis of a sealing surface and the central axis of a valve body flow channel form a certain included angle, namely, the central axis of a valve shaft deviates from the sealing surface and deviates from the central axis of the valve body, and the central axis of the sealing surface and the central axis of the valve body deviate to form a certain included angle, so-called triple offset butterfly valve.

However, the biggest difficulty of the triple offset butterfly valve is that the machining of the sealing surface is required to ensure the accuracy and the surface roughness of the geometric outline of the triple offset butterfly valve in order to achieve the zero leakage standard, so that a specially designed tool is required to enable the central axis of the sealing surface to coincide with the main shaft of a machine tool, and then the numerical control machine tool is matched, so that a qualified product can be reliably produced.

The prior art scheme is as follows: in order to improve the universality of the tool, the technical scheme is that each group of threaded holes with different diameters of the center circle of the bolt are directly processed on the inclined tire 1, then the freedom degree of the part moving on the inclined surface is limited by the

limiting components

6 and 7, and the limiting components can be adjusted through the guide positioning grooves so as to adapt to the processing requirements of the sealing surfaces of the three eccentric butterfly valves with different specifications, and the clamping device directly uses the nuts as clamping elements.

Drawbacks of the prior art solutions:

(1) The limiting block is manually adjusted, so that consistency of processing dimensions of the sealing surface is difficult to ensure, and errors are easy to generate;

(2) When the freedom degree of the part moving on the inclined surface of the top of the inclined tire is limited by the limiting component, the limiting block needs to be adjusted, and the workpiece clamping is relatively time-consuming;

(3) The threaded holes with different diameters of the center circles of the bolts of each group are directly machined on the inclined surface of the top of the inclined tire, so that the universality is limited, once workpieces with other specifications are to be machined, the whole inclined tire needs to be replaced, and the heavy inclined tire is obviously a laborious task;

(4) The basic purpose of designing the triple offset butterfly valve sealing surface processing tool is to enable the central axis of the sealing surface to coincide with the main shaft of the machine tool, but each group of threaded holes directly processed on the inclined tire form a certain included angle with the main shaft of the machine tool, the inclined holes are drilled and the threads are tapped on the inclined holes, so that the difficulty is directly increased for the production of the tool, and the original purpose of improving the production efficiency of the adjustable butterfly valve tool is overcome.

The clamping scheme has the defects that the whole nut is required to be screwed out when the workpiece is to be disassembled, and the clamping efficiency of the workpiece is reduced.

Disclosure of Invention

The utility model aims to provide a processing tool for a sealing surface of a three-eccentric butterfly valve, which aims to solve the problems in the background technology.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a sealed face processing frock of triple offset butterfly valve, includes to one side child, locating plate, work piece, eye screw, flush key and hexagon socket screw, four hexagon socket screw and locating plate threaded connection are passed through on the top of child to one side, the bottom of locating plate is equipped with the keyway, the flush key sets up in the inside of keyway and cooperates with oblique child top flush key elongated slot, the work piece is located through the tang in the top of locating plate, one side and eye screw threaded connection of locating plate.

In the processing tool for the sealing surface of the triple offset butterfly valve, the clamping assembly is composed of a stud, a bolt, a pressing plate and a nut, the bottom end of the pressing plate is connected with the stud and the bolt respectively, and the part of the stud extending to the top of the pressing plate is connected with the nut in a threaded manner.

In the processing tool for the sealing surface of the three-eccentric butterfly valve, the spigot is formed in the middle of the top end of the positioning plate, and the spigot is connected with the workpiece.

Compared with the prior art, the processing tool for the sealing surface of the three-eccentric butterfly valve has the advantages that: the positioning plate is positioned through the flat key and the inner hexagon screw, and the spigot on the positioning plate is matched with the inner circle of the flange sealing surface, so that the consistency of the processing size of the butterfly valve sealing surface can be ensured, and errors caused by manual adjustment of the limiting block are avoided; in order to save the time of adjusting the limiting block in the prior art, the limiting block is directly positioned by the spigot, the spigot is processed on the positioning plate, and the flange sealing surface is directly placed into the spigot when clamping, so that the spigot is matched with the inner circle of the flange sealing surface to realize quick positioning;

the holes matched with the studs on the pressing plate can be long round holes, when the workpiece is clamped and disassembled, the workpiece can be disassembled only by loosening the nuts and then backing out the pressing plate along the long round holes, so that the nuts do not need to be completely unscrewed, and the workpiece clamping efficiency is improved; in order to avoid replacing heavy inclined tires when processing workpieces with other specifications, positioning plates are added between the inclined tires and the workpieces, and when the positioning plates are needed, the inclined tires can be shared by a plurality of positioning plates.

Drawings

FIG. 1 is a schematic perspective view of a three-eccentric butterfly valve sealing surface processing tool.

FIG. 2 is a schematic plan sectional structure view of a triple offset butterfly valve seal face processing tool of the utility model.

FIG. 3 is a schematic top view of a three eccentric butterfly valve sealing surface processing tool of the utility model.

In the figure, 1, an oblique tire; 2. a positioning plate; 3. a workpiece; 4. a stud; 5. a bolt; 6. a pressing plate; 7. a nut; 8. a suspension ring screw; 9. a flat key; 10. an inner hexagon screw; 11. and (5) a spigot.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the tooling for machining the sealing surface of the triple eccentric butterfly valve comprises an inclined tire 1, a positioning plate 2, a workpiece 3, a lifting ring screw 8, a flat key 9 and inner hexagon screws 10, wherein the top end of the inclined tire 1 is in threaded connection with the positioning plate 2 through the four inner hexagon screws 10, a key slot is arranged at the bottom end of the positioning plate 2, the flat key 9 is arranged in the key slot and is matched with a flat key long slot at the top of the inclined tire 1, the workpiece is positioned at the top end of the positioning plate 2 through a spigot, and one side of the positioning plate 2 is in threaded connection with the lifting ring screw 8; the middle part on locating plate 2 top has offered tang 11, and tang 11 cooperates with the interior circle of work piece 3 flange seal face and fixes a position.

In this embodiment, the clamping assembly is composed of a stud 4, a bolt 5, a pressing plate 6 and a nut 7, wherein the bottom end of the pressing plate 6 is respectively connected with the stud 4 and the bolt 5, and the portion of the stud 4 extending to the top of the pressing plate 6 is in threaded connection with the nut 7.

The concrete assembly is as follows: the top of the inclined tire 1 is provided with four threaded holes and a flat key long groove, the inclined tire 1 and the positioning plate 2 are connected together through four inner hexagon screws 10 and two flat keys 9, the inner hexagon screws 10 prevent the positioning plate 2 from moving longitudinally, and the flat keys 9 prevent the positioning plate 2 from moving transversely; the round hole on the lower end surface of the inclined tire 1 is connected with a machine tool in a positioning way.

The upper end face of the positioning plate 2 is provided with a spigot 11, various sizes can be processed according to the pressure grade specification of the butterfly valve specification, and the workpiece 3 is matched with the spigot through the inner circle of the flange sealing surface to realize quick and accurate positioning; the lower end face of the positioning plate 2 is provided with two key grooves, the positioning plate 2 is aligned with the flat key long groove at the top of the inclined tire 1 through the flat key 9 in a matching way, so that a countersunk hole on the positioning plate 2 is aligned with a threaded hole at the top of the inclined tire 1 quickly, and then the inner hexagon screw 10 is screwed up.

The clamping assembly consists of a stud 4, a bolt 5, a pressing plate 6 and a nut 7; the pressing plate 6 is a clamping element, a hole matched with the stud 4 is a slotted hole, when a workpiece is clamped and disassembled, the workpiece can be disassembled only by loosening the nut 7 and then retracting the pressing plate 6 along the slotted hole, so that the nut 7 does not need to be completely screwed out, and the workpiece clamping efficiency is improved; the bolts 5 function as spacers (shims) which can be adapted to flanges of different thickness by turning the bolts without having to specially prepare spacers (shims) of various specifications for adapting to different flange thicknesses.

The caliber of the three-eccentric butterfly valve is generally larger, and correspondingly, the processing tool of the sealing surface of the three-eccentric butterfly valve is generally larger, so that the three-eccentric butterfly valve is difficult to move by manpower, and the lifting screw 8 is required for lifting.

The positioning method can enable the processing size of the processing sealing surface to be more accurate, and the repeated positioning processing size error is smaller.

The locating plate 2 is added between the workpiece 3 and the inclined tire 1, when workpieces of other specifications are processed, the inclined tire 1 does not need to be replaced, but the locating plate 2 is replaced, the processing of the locating plate 2 is obviously much easier than that of the inclined tire 1, and the cost for replacing the locating plate 2 is obviously lower than that for replacing the inclined tire 1 from the aspects of reducing the overall processing difficulty of a tool and saving materials.

The clamping assembly replaces cushion blocks (sizing blocks) with bolts 5, and the cushion blocks (sizing blocks) with various specifications are not required to be specially prepared for adapting to different flange thicknesses, so that the universality of the processing tool for the sealing surface of the three-eccentric butterfly valve is further improved only by adjusting the bolts 5.

What is not described in detail in this specification is prior art known to those skilled in the art. The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a sealed face processing frock of triple offset butterfly valve, includes to one side child (1), locating plate (2), work piece (3), eye screw (8), parallel key (9) and hexagon socket head cap screw (10), a serial communication port, four hexagon socket head cap screw (10) and locating plate (2) threaded connection are passed through on the top of child (1), the bottom of locating plate (2) is equipped with the keyway, parallel key (9) set up in the inside of keyway and with the parallel key elongated slot cooperation at child (1) top to one side, tang (11) have been seted up at the middle part on locating plate (2) top, work piece (3) are fixed a position through tang (11) on the top of locating plate (2), one side and eye screw (8) threaded connection of locating plate (2).

2. The tooling for machining the sealing surface of the triple offset butterfly valve according to claim 1, wherein the clamping assembly consists of a stud (4), a bolt (5), a pressing plate (6) and a nut (7), the bottom end of the pressing plate (6) is respectively connected with the stud (4) and the bolt (5), and the part of the stud (4) extending to the top of the pressing plate (6) is in threaded connection with the nut (7).

3. The tooling for machining the sealing surface of the three-eccentric butterfly valve according to claim 1, wherein the spigot (11) is positioned in an inner circle of the flange sealing surface of the workpiece (3).