CN211667166U

CN211667166U - Novel butterfly valve butterfly plate and valve shaft connecting structure

Info

Publication number: CN211667166U
Application number: CN201922002371.4U
Authority: CN
Inventors: 李习洪; 彭阳超; 马志祥
Original assignee: WUHAN DAYU VALVE CO Ltd
Current assignee: WUHAN DAYU VALVE CO Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-10-13
Anticipated expiration: 2029-11-19

Abstract

The utility model relates to a valve structure technical field specifically indicates a novel butterfly valve butterfly plate and valve shaft connection structure. Comprises a butterfly plate and a valve shaft; the butterfly plate is provided with a shaft hole for the valve shaft to pass through; the valve shaft is positioned in the shaft hole, and a pin hole is formed in the outer side of the circumference of the valve body; a pin penetrates through the pin hole; the pin passes through butterfly plate and valve shaft in proper order, and one side is hugged closely the shaft hole lateral wall, and the opposite side is hugged closely pin hole bottom surface, is provided with the fastening structure of fixed pin on the butterfly plate between pin and the butterfly plate, is provided with the wedge structure that forces pin and valve shaft zonulae occludens between pin and the valve shaft. The utility model discloses a butterfly plate and valve shaft connection structure are very simple, have solved long-term use and have appeared the problem that the easy pine takes off after wearing and tearing, and the installation is simple, and low cost has very big spreading value.

Description

Novel butterfly valve butterfly plate and valve shaft connecting structure

Technical Field

The utility model relates to a valve structure technical field specifically indicates a novel butterfly valve butterfly plate and valve shaft connection structure.

Background

Generally, a butterfly valve and a butterfly plate are generally cast in a casting process, the materials are mainly nodular cast iron, and the upper valve shaft and the lower valve shaft are generally made of stainless steel; the butterfly plate and the valve shaft are connected through a flat key, a spline, a square head and the like to transmit torque, and the valve is opened and closed by operating the butterfly plate to rotate through the valve shaft. However, such a connection method has many disadvantages and risks. Because need directly trompil on the valve shaft, the long live time will appear wearing and tearing, leads to the aperture grow, produces the space between round pin and the axle, the easy problem that drops that appears. Moreover, the installation and fixing structure is complex, the installation and manufacturing cost is high, and the problem of difficult installation exists.

Disclosure of Invention

The utility model aims at solving the defects of the prior art and providing a novel butterfly valve butterfly plate and valve shaft connecting structure.

The technical scheme of the utility model is that: the utility model provides a novel butterfly valve butterfly plate and valve shaft connection structure which characterized in that: comprises a butterfly plate and a valve shaft; the butterfly plate is provided with a shaft hole for the valve shaft to pass through; the valve shaft is positioned in the shaft hole, and a pin hole is formed in the outer side of the circumference of the valve body; a pin penetrates through the pin hole; the pin passes through butterfly plate and valve shaft in proper order, and one side is hugged closely the shaft hole lateral wall, and the opposite side is hugged closely pin hole bottom surface, is provided with the fastening structure of fixed pin on the butterfly plate between pin and the butterfly plate, is provided with the wedge structure that forces pin and valve shaft zonulae occludens between pin and the valve shaft.

The wedge-shaped structure further comprises an inclined slope surface at one side of the pin facing the pin hole; the slope surface is an inclined end surface structure formed by gradually changing the thickness of the pin; the bottom surface of the pin hole is an inclined end surface matched with the slope.

Further slope surface is an inclined end surface structure formed by gradually reducing the axial thickness of the pin from one end of the fastening structure arranged on the pin to the other end entering the pin hole.

Further one side of the pin deviating from the slope is a circular arc-shaped end face which is tightly attached to the side wall of the shaft hole and is arranged along the horizontal direction or the vertical direction.

And a plurality of pins which are positioned on the same side of the axis of the valve shaft and are arranged at intervals along the axial direction of the valve shaft penetrate through the valve shaft.

Further the axis of the pin is perpendicular to the axis of the valve shaft.

Further wear to be equipped with the pin that the multiunit was arranged along valve shaft axial interval on the valve shaft, every group pin includes two and uses the valve shaft axis as the pin of central symmetry arrangement.

The fastening structure further comprises a blind hole formed in the end part of the pin; a screw penetrates through the blind hole; and the butterfly plate is provided with a screw hole for fixing a screw.

Further, a slotted hole for containing a pin is formed in the butterfly plate on the side part of the shaft hole; and a gap is reserved between the bottom surface of the slot hole corresponding to the end part of the pin and the end part of the pin after the pin is installed into the slot hole.

The utility model has the advantages that: 1. the pin of the utility model is positioned between the butterfly plate and the valve shaft, the pin hole arranged on the valve shaft is positioned on the surface of the valve shaft, the wedge-shaped structure can effectively deal with the wear problem after long-term use, the pin is jointed with the butterfly plate and the valve shaft, and in the rotating process, the pin, the butterfly plate and the valve shaft are locked more and more tightly, and the problem of loosening can not occur;

2. the utility model has the advantages that the pin is provided with the slope structure, the valve shaft is provided with the corresponding inclined end surfaces, the two inclined end surfaces are locked by the laminating of the two inclined end surfaces, and after the abrasion problem occurs, the pin can be pressed to eliminate the abrasion, thereby prolonging the service life;

3. the thickness of the pin of the utility model is gradually reduced from top to bottom to form a slope structure, and the pin is a pin-shaped structure with a big top and a small bottom, which is convenient for installation and later adjustment of the pin;

4. the pin of the utility model is closely attached to the side wall of the shaft hole, and the end face of the pin connected with the side wall of the shaft hole is of a circular arc end face structure, so that the contact area is large, the connection is more stable, the friction force is large, and the pin is not easy to loosen and slide;

5. the utility model arranges a plurality of pins on the valve shaft, the pins are positioned at the same side of the valve shaft and are arranged at intervals along the axial direction of the valve shaft, thus improving the connection strength of the valve shaft and the butterfly plate;

6. the utility model arranges a plurality of pins on the valve shaft, which are respectively arranged at two sides of the axis of the valve shaft, so that the stress at two sides of the valve shaft is balanced, and the connection stability of the valve shaft and the butterfly plate is improved;

7. the blind hole is arranged at the end part of the pin, the pin is fixed on the butterfly plate through the screw, the pin, the valve shaft and the butterfly plate can be stably fixed and positioned into a whole by dragging the screwing screw, and the whole installation and connection mode is very simple;

8. the utility model discloses set up the slotted hole of holding pin one side on the butterfly plate, and leave the clearance between slotted hole bottom and the pin lower extreme, be convenient for after wearing and tearing appear, adjust the position of pin, make the pin stretch into the slotted hole in, the pin closely laminates with the valve shaft.

The utility model discloses a butterfly plate and valve shaft connection structure are very simple, have solved long-term use and have appeared the problem that the easy pine takes off after wearing and tearing, and the installation is simple, and low cost has very big spreading value.

Drawings

FIG. 1: the schematic view of the connection structure of the valve shaft and the butterfly plate of the utility model;

FIG. 2: the utility model is a schematic view of the connection structure of the pin, the valve shaft and the butterfly plate;

FIG. 3: the pin hole processing structure of the utility model is in axial view;

FIG. 4: the cross section of the pin hole processing structure of the utility model is shown schematically;

wherein: 1-a butterfly plate; 2-a valve shaft; 3-pin hole; 4-pins; 5, slope surface; 6-screw; 7-slotted hole.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

As shown in fig. 1 to 4, a shaft hole is formed in the butterfly plate 1 of the present embodiment for installing a valve shaft 2, wherein the valve shaft 2 includes an upper valve shaft and a lower valve shaft, and the axes of the upper valve shaft and the lower valve shaft coincide. The end of the valve shaft 2 extends into the corresponding shaft hole and is fixed in the shaft hole through the pin 4, and the axis of the pin 4 of the embodiment is vertical to the axis of the valve shaft 2.

As shown in fig. 1-4, the valve shaft 2 is located the valve body circumference outside of the shaft hole and has been seted up the pin hole 3, and the pin hole 3 is open structure promptly, wears to be equipped with pin 4 in the pin hole 3, and one side that pin 4 is towards pin hole 3 is provided with the domatic 5 of slope, and domatic 5 is the straight terminal surface structure of slope that pin 4 thickness gradually changes the formation, and wherein pin 4 stretches into the tip in the pin hole 3 to the body of rod that pin 4 is located pin hole 3 outside along the pin 4 axial thickness increase gradually. The bottom surface of the pin hole 3 is an inclined end surface matched with the slope surface 5, the slope surface 5 is tightly attached to the bottom surface of the pin hole 3 during installation to form a connecting structure similar to a wedge-shaped structure, and the pin 4 can be stably fixed on the valve shaft 2 by tightening the pin 4.

As shown in figure 2, a slot 7 for accommodating the pin 4 is formed in the butterfly plate 1 at the side part of the shaft hole, and a gap is reserved between the bottom surface of the slot 7 corresponding to the end part of the pin 4 and the end part of the pin 4 after the pin 4 is installed in the slot 7. One side that pin 4 deviates from domatic 5 is the convex terminal surface structure that its axis of following the level or vertical direction arrangement that closely laminates with the shaft hole lateral wall, and in slotted hole 7 was worn to locate by one side that pin 4 deviates from domatic 5, the arc terminal surface of pin 4 was hugged closely in slotted hole 7's arc terminal surface, zonulae occludens. After abrasion occurs after long-term use, the pin 4 can be tightened, so that the pin 4 moves into the groove hole 7, the pin 4 can feed into the gap due to the gap, and the pin 4 moves to the gap along the axial direction to tighten the slope 5 and the pin hole 3.

The pin 4 is kept away from the one end of little head end and has been seted up the blind hole, wears to be equipped with screw 6 in the blind hole, offers the screw that is used for set screw 6 on the butterfly plate 1. The bolt 6 sequentially penetrates through screw holes in the butterfly plate 1 and extends into the blind hole, and the bolt 6 is screwed to fix the pin 4 on the butterfly plate 1.

And (3) actual processing: 1. after the shaft hole of the butterfly plate 1 is finely machined, as shown in fig. 3-4, the valve shaft 2 is sleeved into a drill jig positioning shaft for positioning, the pin hole 3 is finely machined through the guidance of a drill bushing, and then tapping is carried out, so that the machining precision can be effectively ensured;

2. processing an inclined end face in a pin hole 3 of the valve shaft 2 under the condition of not influencing the strength of the valve shaft, and ensuring that the surface roughness of a bevel face of the inclined end face is not lower than Ra6.3;

3. under the condition of not influencing the strength of the pin 4, processing a slope 5 with the same angle as the inclined end face of the valve shaft 2 on the pin 4, and ensuring that the roughness of the groove surface of the slope 5 is not lower than Ra6.3; the end face of the pin 4 must have a blind hole with internal thread for easy disassembly.

During installation, the end part of the valve shaft 2 extends into the shaft hole and penetrates into the pin 4, so that the slope surface 5 of the pin 4 is tightly attached to the bottom surface of the pin hole 3, and then the screw 6 is tightened to fix the valve shaft 2.

The pin hole 3 of the present embodiment is a circumferential surface penetrating the pin 4 in the axial direction of the valve shaft 2, and the bottom surface of the pin hole 3 indicates one side of the pin hole 3 in the radial direction of the pin 4.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel butterfly valve butterfly plate and valve shaft connection structure which characterized in that: comprises a butterfly plate (1) and a valve shaft (2); the butterfly plate (1) is provided with a shaft hole for the valve shaft (2) to pass through; the valve shaft (2) is positioned in the shaft hole, and a pin hole (3) is formed in the outer side of the circumference of the valve body in the shaft hole; a pin (4) penetrates through the pin hole (3); the pin (4) penetrates through the butterfly plate (1) and the valve shaft (2) in sequence, one side of the pin (4) is tightly attached to the side wall of the shaft hole, the other side of the pin (4) is tightly attached to the bottom surface of the pin hole (3), a fastening structure for fixing the pin (4) on the butterfly plate (1) is arranged between the pin (4) and the butterfly plate (1), and a wedge-shaped structure for forcing the pin (4) to be tightly connected with the valve shaft (2) is arranged between the pin (4) and the valve shaft (2).

2. The novel butterfly valve butterfly plate and valve shaft connecting structure of claim 1, characterized in that: the wedge-shaped structure comprises an inclined slope surface (5) of one side of the pin (4) facing the pin hole (3); the slope surface (5) is an inclined end surface structure formed by gradually changing the thickness of the pin (4); the bottom surface of the pin hole (3) is an inclined end surface matched with the slope surface (5).

3. The novel butterfly valve butterfly plate and valve shaft connecting structure of claim 2, wherein: slope surface (5) is equipped with the slope terminal surface structure that fastening structure one end reduces the formation along pin (4) axial thickness gradually to the other end that enters into in pin hole (3) for pin (4).

4. The novel butterfly valve butterfly plate and valve shaft connecting structure of claim 3, wherein: one side of the pin (4) departing from the slope (5) is an arc-shaped end face which is tightly attached to the side wall of the shaft hole and the axis of which is arranged along the horizontal or vertical direction.

5. The novel butterfly valve butterfly plate and valve shaft connecting structure of any one of claims 1 to 4, wherein: the valve shaft (2) is provided with a plurality of pins (4) which are positioned at the same side of the axis of the valve shaft (2) and are arranged at intervals along the axial direction of the valve shaft (2).

6. The novel butterfly valve butterfly plate and valve shaft connecting structure of claim 5, wherein: the valve shaft (2) is provided with a plurality of groups of pins (4) which are arranged at intervals along the axial direction of the valve shaft (2), and each group of pins (4) comprises two pins (4) which are symmetrically arranged by taking the axis of the valve shaft (2) as the center.

7. The novel butterfly valve butterfly plate and valve shaft connecting structure of claim 6, wherein: the axis of the pin (4) is vertical to the axis of the valve shaft (2).

8. The novel butterfly valve butterfly plate and valve shaft connecting structure of claim 1, characterized in that: the fastening structure comprises a blind hole formed in the end part of the pin (4); a screw (6) penetrates through the blind hole; the butterfly plate (1) is provided with a screw hole for fixing the screw (6).

9. The novel butterfly valve butterfly plate and valve shaft connecting structure of claim 1, characterized in that: a slotted hole (7) for accommodating the pin (4) is formed in the butterfly plate (1) on the side part of the shaft hole; and a gap is reserved between the bottom surface of the slotted hole (7) corresponding to the end part of the pin (4) and the end part of the pin (4) after the pin (4) is installed and enters the slotted hole (7).