JPH084906A - Butterfly valve device - Google Patents

Abstract

PURPOSE:To provide a butterfly valve device for opening and closing a pipeline, in which a valve body and a valve stem can be easily assembled without using a tool and the like and a flow-through resistance is reduced. CONSTITUTION:A valve body 12 is held between a pair of thin supporting shafts 14, and the end parts of the respective supporting shafts 14 which are projected on both sides of the valve body are combined and inserted into the recessed holes 22 which are formed in the inner ends of a pair of valve stems 17, 18, thereby integratedly connecting the valve body 12, the supporting shafts 14 and the valve stems 17, 18 to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve device which is installed in a pipeline such as an exhaust pipe of an automobile engine to open and close the pipeline, and particularly to a valve body and a rotatably supporting the valve body. The present invention relates to a butterfly valve device that can be easily connected to a valve shaft.

[0002]

2. Description of the Related Art As a conventional butterfly valve device,
For example, a structure as shown in FIG. 9 is known.

In this butterfly valve device, bearing portions (102) are symmetrically projected on both sides of a body having a duct (101) having a circular cross section, and are housed in the duct (101). Disc (10
The opposite end portions of a pair of left and right valve shafts (104) (105) that are coaxially opposed to each other in the diametrical direction are fixed to both side peripheral edges of 4), and the valve shafts (104) (105) are The valve body (103) is rotatably supported by being fitted into the bearing (106) housed in the bearing portion (102).

An operating shaft (107) is connected to the outer end of one valve shaft (105) projecting to the outside of the bearing (102), and a valve body (107) is connected to the operating shaft (107). Lever for opening and closing (103)
(Not shown) is fixed.

FIG. 10 shows the valve body (103) of FIG. 9 and a pair of valve shafts.
(104) is a perspective view showing the point of connection with (105), in which a pair of notches (108) are symmetrically formed on both side peripheral edges of the valve body (103), and each of the valve shafts (104) (105) Slit (109) formed on the inner end widened part
By sandwiching each of them in the notches (108).
(103) is connected to a pair of valve shafts (104) (105).

FIG. 11 is a perspective view showing another example of connection between the valve body and the valve shaft. In this example, the left and right valve stems (110) (111)
Are integrally formed via the intermediate shaft (112).

The intermediate shaft (112) is formed with a flat surface portion (113) adapted to the outer diameter of the valve body (114), and the flat surface portion (113) for mounting the valve body (114). A female screw hole (not shown) is provided.

A disc-shaped valve body (114) is provided with a bolt hole (115) aligned with the female screw hole of the flat surface portion (113), and the valve body (114) and the valve shaft are connected by a bolt (116). I am doing it.

FIG. 12 is a plan view showing a further example of connection between the valve body and the valve shaft, and FIG. 13 is a partial sectional view taken along line XIII-XIII in FIG.

In this example, a pair of slits (118) are carved in parallel in the vicinity of the center of the disc-shaped valve body (117) at a required interval, and a slit (118) in the valve body (117) is formed. The part between
The outer part of the slit (118) is curved in a semicircular shape in the opposite directions to each other, and the valve shaft (121) is inserted between them to form a valve body (11
The valve shaft (121) is tightly connected by the elastic force of 4).

[0011]

Each of the above-mentioned conventional butterfly valve devices has an example in which the valve body and the valve shaft are connected to each other, which have the following problems.

In FIGS. 9 and 10, the valve body (10
Two notches (108) are formed in 3) and each valve shaft (104)
Since it is necessary to engrave the slits (109) at the inner ends of the (105), the number of processing steps becomes large.

Further, the valve body (103) and a pair of valve shafts (104) (105)
In order to accurately align the axis lines of and, the notch (108) and the slit (109) must be processed with high precision, and the work is complicated and the cost is high.

In the structure shown in FIG. 11, the intermediate shaft (113) of the valve shaft projects on one side of the valve body (114) in the direction traversing the pipeline, and the head of the bolt (116) is on the other side. Because of the protrusion, turbulence occurs in the fluid flowing through the pipe when the valve body is opened, and the flow resistance increases.

Further, the flat portion (113) and the female screw hole are formed on the valve shaft, and the bolt (116) is required to be tightened, which requires a large number of processing steps and assembling steps, resulting in a high cost.

The one shown in FIG. 13 can be manufactured more easily than the above-mentioned one, but since there are through holes at both ends of the slit (118), when the valve body (117) is closed, that part is formed. There is an inconvenience that leaks to the.

The present invention has been made to solve the above problems, and provides a butterfly valve device which is easy to assemble and has a relatively small fluid flow resistance. With the goal.

[0018]

According to the present invention, the above problems can be solved as follows. (1) A position at which a valve body accommodated in a conduit through which a fluid flows is supported by a valve shaft that traverses the conduit to close the conduit,
In a butterfly valve device adapted to rotate between a position where a pipe is opened and a position where a pipe is opened, a plate-shaped valve body having a plurality of locking holes formed along a rotation axis and a rotation axis on both sides of the valve body. Both end portions of the valve body, which are arranged to face each other along the outer periphery of the valve body and project outward from both outer edges of the valve body, are combined with each other to form a desired cross-sectional shape, and at least one surface abutting the valve body has a valve body. A pair of support shafts provided with upright locking pins to be inserted into the locking holes, and a pair of valve shafts coaxial with the support shafts and having concave holes matching the cross-sectional shapes of both ends. Be prepared.

(2) In the above item (1), the cross-sectional shape of each support shaft in at least the region contacting the valve body is formed in a relatively thin plate shape having an outer surface parallel to the surface of the valve body.

(3) In the above item (1) or (2), the cross-sectional shapes of the both ends of the pair of support shafts and the concave hole of the valve shaft are non-circular.

[0021]

A pair of support shafts are abutted and sandwiched on both sides of the valve body along the rotation axis of the valve body, and a locking pin erected on the support shaft is fitted into a locking hole of the valve body. Thus, by fixing the valve body and the pair of support shafts to each other and inserting both end portions of the pair of support shafts into the recessed holes of the valve shaft, the valve body, the support shaft, and the valve shaft are integrated. Be combined.

[0022]

1 is a plan view of an embodiment of the present invention, FIG.
2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is II in FIG.
It is sectional drawing in the I-III line.

FIG. 4 is an exploded perspective view showing the main members of this embodiment.

In the conduit (10) shown in FIG. 1, bearing portions (11) are symmetrically provided on both sides according to the conventional example.

The disc-shaped valve body (12) is provided with a plurality of (two in this embodiment) locking holes (13) along the axis of rotation.

A pair of front and back support shafts (1
4) is provided in contact with the surface of the valve body (12) along the axis of rotation.

The support shafts (14) in this embodiment have the same shape as each other and are formed in a substantially trapezoidal cross section as shown in FIG. 3, and the length thereof is made larger than the diameter of the valve body (12). , Valve body
A protrusion (15) having a height equal to the thickness of the valve body (12) is provided on one of the ends protruding from the outer edge of the (12) so as to project toward the support shaft (14) on the opposite side.

The pair of support shafts (14) have locking holes for the valve body (12).
A plurality of (two) locking pins (16) are provided upright at positions aligned with (13) at a height not more than half the plate thickness of the valve body (12).

The pair of support shafts (14) are connected to the locking pins (1
6) is inserted into the locking hole (13) of the valve body (12), assembled to the valve body (12), and the pair of support shafts (14) and the valve body (12) are connected to the locking pin ( 16)
Through, fix to the stereotactic value and assemble.

At this time, the both ends of each support shaft (14) are assembled with the protrusions (15) in contact with each other, and in this embodiment, a pair of opposing arcs are connected by a straight line. Form an oval cross section.

Both ends of the pair of supporting shafts (14) combined are supported by bearings (11a) inserted into bearings (11) via valve shafts (17) and (18), respectively.

The valve shafts (17) and (18) are large-diameter sockets (19) each provided with a concave hole (22) formed in a cross-sectional shape corresponding to the shape of the end of the support shaft (14), and its socket. Shaft part connected to the outside (20)
It has and.

The valve shaft (18) on the valve operating side has a shaft portion (20) longer than the other so as to project to the outside of the bearing portion (11), and an operating shaft (21) to which an operating lever is mounted is continuously provided. There is.

In order to assemble the butterfly valve device of FIG. 1, in the pipe line (10), bearing parts are attached to both ends of a pair of support shafts (14) mounted and assembled on both sides of the valve body (12). (11)
Inserted into the socket (19) of the valve shaft (17) (18)
Fit 2).

At this time, since the cross-sectional shapes of the both ends and the concave hole (22) are oval-shaped so as to match each other, the valve shaft (17) (1
8) and the pair of support shafts (14) and the valve body (12) are assembled together without any angular displacement.

Next, from the outside of the bearing portion (11), the bearing (11a)
When the valve shafts (17) and (18) are fitted and the cover plate is attached, the pair of valve shafts (17) and (18) are inserted into the recessed holes (22) of the socket (19) and the support shaft (14). The valve body (12) is rotatably supported at a required position while being held in a position for supporting the end portion.

At the time of assembly, the locking pin of the support shaft (14)
(16) is inserted into the locking hole (13) of the valve body (12), and a pair of support shafts
Connect the end of (14) to the socket (1) of the valve shaft (17) (18).
The work of fitting in the concave hole (22) of 9) does not require any tool and can be performed very easily.

Further, since the pair of support shafts (14) are formed to be thin, when the valve body (12) is in the open position, the conduit (1
The flow resistance of 0) is small, and the fluid can be passed smoothly.

The present invention is not limited to the above-described embodiment, but includes various modifications and changes.
It should be understood.

For example, in the above-mentioned embodiment, the valve body (12)
A locking pin (16) for fixing the support shaft (14) and the support shaft (14) is erected on both of the pair of support shafts (14) at a height not more than half the plate thickness of the valve body (12). However, as shown in FIG. 5, one of the support shafts (2
The locking pin (24) with a height exceeding the plate thickness of the valve body (12) is erected only on (3), and the head of the locking pin (24) is inserted into the support shaft (25) on the other side. A concave hole (25a) may be provided.

The concave hole (25a) of the support shaft (25) on the other side is shown in FIG.
As shown in FIG. 2, it may pass through the support shaft (25) or may be a blind hole deep enough to accommodate the head of the locking pin (24) protruding from the valve body (12).

Further, the valve body (2) is provided on the opposing surfaces of the pair of support shafts.
One locking pin penetrating through each may be provided upright, and each locking pin may be fitted into a recessed hole formed in the support shaft on the other side.

6 to 8 are cross-sectional views showing examples of the cross-sectional shape of the end portion in which a pair of support shafts are combined, and the concave hole (22) of the socket of the valve shaft.

FIG. 6 is the same as the embodiment shown in FIGS. 1 to 4, and the valve shaft (14) and the recessed hole (22) are formed in an oval cross section so that the valve body ( 12) and the valve shafts (17) (18) are connected so as not to cause an angular displacement.

FIG. 7 shows an embodiment in which the end of the pair of support shafts (26) and (27) is combined with a circular cross-section, and the socket (19) also has a concave hole. By pressing the end of the support shaft into the recess, angular displacement is prevented.

In the embodiment shown in FIG. 7, the processing of each member is easy,
In particular, there is an advantage that the concave hole of the socket (19) can be formed by a simple lathe work.

FIG. 8 shows an embodiment in which a pair of supporting shafts (28) and (29) are combined to form an end having a square sectional shape.
Similar to the above case, angular displacement between the valve body (12) and the valve shafts (17) and (18) can be reliably prevented.

In this case, the cross-sectional shape of the end may be a shape other than the square shown in FIG. 8, such as a rectangle or a rhombus.

[0049]

According to the present invention, the following effects can be obtained.

(A) A locking pin erected on the support shaft is fitted into the locking hole of the valve body, and both ends of the pair of support shafts are inserted into the recessed hole of the valve shaft. As a result, each member can be easily and reliably assembled integrally without using a tool or the like.

(B) According to the second aspect of the invention, the flow resistance does not increase when the valve body is opened, and the passage of fluid is not hindered.

(C) According to the third aspect of the invention, since the support shaft and the valve shaft are reliably prevented from rotating, angular displacement does not occur between the valve body and the valve shaft.

[Brief description of drawings]

FIG. 1 is a front view of a butterfly valve device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an exploded perspective view showing main members of the apparatus shown in FIG.

5 is a sectional view of the same portion as FIG. 3 in another embodiment of the present invention.

FIG. 6 is a cross-sectional view showing an embodiment in which an end portion in which a pair of support shafts are combined has an oval cross-sectional shape.

FIG. 7 is a cross-sectional view showing an embodiment in which the end portion has a circular cross-sectional shape.

FIG. 8 is a cross-sectional view showing an example in which the cross-sectional shape of the end portion is square.

FIG. 9 is a front view showing an example of a conventional butterfly valve device.

FIG. 10 is a perspective view showing main members of the apparatus shown in FIG.

FIG. 11 is a perspective view showing an example of connection between a conventional valve body and a valve shaft.

FIG. 12 is a plan view showing another example of connection.

13 is a partial cross-sectional view taken along line XIII-XIII in FIG.

[Explanation of symbols]

 (10) Pipe line (11) Bearing part (11a) Bearing (12) Valve body (13) Locking hole (14) Support shaft (15) Protrusion (16) Locking pin (17) Valve shaft (18) Valve Shaft (19) Socket (20) Shaft (21) Operation shaft (22) Recessed hole (23) Support shaft (24) Locking pin (25) Support shaft (26) Support shaft (27) Support shaft (28) Support Axis (29) Support axis

Claims (3)

[Claims] 1. A valve body housed in a conduit through which a fluid flows is supported by a valve shaft that traverses the conduit, and rotates between a position for closing the conduit and a position for opening the conduit. In the butterfly valve device configured as described above, a plate-shaped valve body having a plurality of locking holes formed along the rotation axis and a valve body arranged on both sides of the valve body so as to face each other along the rotation axis. Both ends projecting outward from both outer edges of the valve are combined with each other to form a required cross-sectional shape, and a locking pin that is fitted into a locking hole of the valve on at least one surface that abuts on the valve. A butterfly valve device, comprising: a pair of support shafts that stand upright; and a pair of valve shafts that are coaxial with the support shafts and that have concave holes that match the cross-sectional shapes of both ends. 2. A cross-sectional shape of each support shaft at least in a region in contact with the valve body is formed in a relatively thin plate shape having an outer surface parallel to the surface of the valve body. Butterfly valve device. 3. Both ends of which a pair of support shafts are combined,
The butterfly valve device according to claim 1 or 2, wherein a cross-sectional shape of the valve shaft and the concave hole is non-circular.