JPH074275A - Initial setting method of rotation range of valve shaft in fluid control valve device - Google Patents

Abstract

PURPOSE:To set position relation of a valve shaft and a fixed stopper correctly and easily to a retulation stopper in accordance with a position of each valve body when it is closed totally. CONSTITUTION:As one valve body 12 is held at a position where it is totally closed, or almost totally closed, one end 18a of a lever 18 engaged with a valve shaft 10 with play for rotating the valve shaft 10 is applied to a fixed stopper 19, and after the lever 18 is fixed to the valve shaft 10 in this condition, the valve shaft 10 is rotated till the other valve body 12 reaches a position where it is totally closed or almost totally closed, and a regulation stopper 20 is regulated in such a way that the regulation stopper 20 is applied to the other end 18b of the lever 18 in this condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid control valve device for allowing a high temperature fluid such as exhaust gas discharged from an internal combustion engine to selectively or simultaneously flow through two passages. The present invention relates to a method for initially setting a rotation range that regulates the movement range.

[0002]

2. Description of the Related Art As a conventional device of this type, for example, a patent application filed on February 3, 1993 by the present applicant (Japanese Patent Application No.
No. 377355), there are those disclosed in the specification and drawings attached to the application.

This conventional device is a valve device in which the flow rate of high-temperature gas flowing through a main passage and a sub passage provided side by side in a body is controlled by opening and closing a valve body accommodated therein. The valve bodies are fixed to a first valve shaft and a second valve shaft that are coaxially supported by the body in a direction orthogonal to the passages and that are coaxial with each other. The two valve bodies have such a relationship that when one valve body is fully closed, the other valve body is fully opened, and when the other valve body is fully closed, one valve body is fully opened. An angular shaft portion is provided at one end of the valve shaft, and an actuator mechanism is connected to each of the shaft portions so that the valve shaft and both valve bodies can be integrally rotated by the actuator mechanism. Has become.

[0004]

In the conventional device as described above, the adjustment of the mounting position of the stopper for restricting the rotation range of the valve shaft is performed accurately in correspondence with the position of each valve body when fully closed. If the adjustment is tedious and the adjustment is inaccurate, the amount of fluid leakage at the time of closing the valve increases, or the valve body abuts the inner surface of the passage at the time of closing the valve.
The impact at the time of closing the valve may directly act on the inner surface of the valve body or the passage, and they may be worn or damaged.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and each of two parallel fluid passages formed in the body. , A disk-shaped valve body that opens and closes each passage is arranged, and each valve body is rotatably arranged on the same axis line orthogonal to each passage, and one valve body is fully closed. In the fluid control valve device, the other valve body is sometimes fully opened, and the one valve body is fully opened when the other valve body is fully closed. A method of initializing the range, wherein one valve element is held in a fully closed position or a position close to a fully closed position, and one end of a valve shaft rotating lever loosely fitted to the valve shaft is brought into contact with a fixed stopper, After fixing the lever to the valve shaft in that state, the other valve body reaches the fully closed position or a position close to the fully closed position. Rotates the valve shaft until the, and as adjusted stopper in this state is brought into contact with the lever, and adjusting the adjusting stopper. The valve shaft and the lever are preferably fixed by welding.

[0006]

According to the present invention, the turning range of the lever can be accurately regulated so as to ensure the fully closed and fully opened valve bodies in both passages, and the work can be performed easily. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 7, especially in FIG. 1, (1)
Is connected at its upstream end to an exhaust manifold (not shown) of the vehicle or formed integrally with the exhaust manifold, and its downstream end is branched into two branch pipes (1a) (1b). A bifurcated pipe, the valve device of the present invention at the end of each branch pipe (1a)
The upstream end of (V) is joined by a flange joint (2).

The valve device (V) is provided with two parallel passages (3) for high-temperature fluid which communicate with the respective branch pipes (1a) (1b).
It has a body (5) on which (4) is formed. In the present embodiment, the passage (3) is a large-diameter main passage, and the passage (4) is a small-diameter sub-passage.

The main exhaust pipe (6) is connected to the downstream end of the main passage (3) in the body (5), and the downstream end of the auxiliary passage (4) is, for example, a catalytic type. A bypass pipe (7) that joins the main exhaust pipe (6) is connected through an exhaust gas purifying device or a known exhaust gas utilization device (all not shown).

As shown in FIGS. 2, 3 and 4, the body
A straight shaft hole (8) orthogonal to both passages (3) and (4) is bored in the central portion of (5), and the shaft hole (8) has two straight left and right lines. The valve shaft, that is, the valve shaft portion (9) for the main passage (3), the valve shaft consisting of (9 ') and the valve shaft (10) for the auxiliary passage (4) are rotatable with the bush (11). Is pivoted to.

The valve shaft portions (9) and (9 ') are formed with a slot-like groove (16) at the center of the end portions facing each other, and the slot-like groove (16) is used for the main passage. Both ends (17) of the disc-shaped valve body (12) are fitted. Both ends (1
It is preferable that a cutout is formed in 7) so that the slot-like groove (16) and the cutout are fitted and locked.

To be precise, the shape of the valve bodies (12) (13) is preferably elliptical with the minor axis being substantially the same as the inner diameter of the main passage (3).
(See Figures 3 and 5). In the sub-passage (4), the disc-shaped valve element (13) having the above-mentioned shape is provided on the valve shaft (10), which is formed by notching the intermediate portion in the axial direction in the flat direction, and two hexagon bolts (14) It is attached at. The heads of these hexagon bolts (14) should be made as thin as possible.

The left end of the shaft hole (8) is closed by a closing member (15). Both valve shafts are provided with a slotted groove (9a) provided on one of their opposing ends and a slotted groove (9a) provided on the other opposing end, with a slight margin in the axial direction. The shaft joint (21) (FIG. 3) including the projecting piece (10a) fitted together is relatively movable in the axial direction, but is relatively unrotatably connected to each other.

At the right end of the valve shaft (10) protruding rightward from the shaft hole (8), a lever (18) (Fig. 4) having a lever pin (22) associated with an actuator (not shown) is welded. Has been done. This lever (18) can rotate between a fixed stopper (19) and an adjusting stopper (20) which is an adjusting bolt. This rotation angle is about 60 degrees.

As shown in FIGS. 5 and 6, both valve bodies (12) (1
3) is the main passage when the valve body (13) of the sub passage (4) is fully closed.
The valve body (12) of (3) fully opens the passage (3) (state shown by a solid line),
When the valve body (13) of the sub passage (4) is fully opened, the valve body (12) of the main passage (3) completely closes the passage (3) (state shown by imaginary line). It is fixed to the shaft. That is, the valve bodies (12) and (13) are mounted in a relationship in which the rotation angles are equal to each other and 60 degrees apart from each other.

When the valve shaft (10) is rotated in one direction or the other direction by the actuator, the valve shaft and the valve bodies (12) and (13) rotate integrally, and as described above, both passages are rotated. (3) and (4) are opened and closed in reverse relation to each other.

Next, a description will be given of an embodiment of the method for initially setting the rotation range of the valve shaft according to the present invention. First, the main passage (3)
The valve body (12) is inserted into the valve shaft portions (9) and (9 ') using a press fitting jig, and the bush (11) is fitted. Next, the valve shaft (10) for the sub passage (4) is inserted so that the shaft coupling (21) is fitted. At this time, it is preferable to fully close the valve body (12) so that the valve body mounting surface of the valve shaft (10) is parallel to the hole of the sub passage (4). The bush (11) and the seal ring (24) are inserted into the valve shaft (10) at an appropriate time before and after the valve shaft (10) is inserted into the shaft hole (8), and then the outside of the valve shaft (10). Seal retainer at the end (25)
Press fit. In addition, the outer end of the valve shaft portion (9 ') is provided with a blocking material.
(15) is press-fitted using a press-fitting jig, and TIG is inserted into the body (5).
Weld. Further, the valve body (12) is attached to the valve shaft portion (9) (9 ') by T
IG welding.

The lever 18 is TIG welded with the lever pin 22 associated with the actuator described above. Then the valve stem
A shaft hole at the center of the lever (18) is loosely fitted to the shaft head of (10) and the valve body (12) of the main passage (3) is fully closed, or the valve body (12) and the main passage are closed.
Insert a thin gauge (not shown) corresponding to a predetermined valve gap between the inner surface of (3) and stop it at a position close to fully closed, and use the valve shaft (10) as a jig. The lever (18) is rotated around the valve shaft (10) until one end (18a) of the lever (18) contacts the fixed stopper (19) in that state, and at that position the lever (18) 18) is fixed with a welding jig, and in that state the lever
(18) is welded to the shaft head of the valve shaft (10) around the entire circumference of the TIG as indicated by reference numeral (23).

Next, the valve body (13) is fixed to the valve shaft (10) by tightening it with two hexagon bolts (14), and then the valve shaft (10) is rotated to completely remove the valve body (13). Close it or insert a thin gauge (not shown) corresponding to a predetermined valve gap between the valve body (13) and the inner surface of the sub-passage (4) to stop at a position close to full closure. , Then, the adjustment stopper screwed into the body (5)
The adjustment stopper (20) is adjusted so that the tip of the (20) abuts the other end (18b) of the lever (18) with zero clearance, and fixed at that position.

Finally, after connecting the output pin of the actuator to the lever pin (22), the E-shaped retaining ring and the washer are attached to the tip of the lever pin (22).

The valve body (13) includes a lever (18) and a valve shaft (10).
It may be fixed to the valve shaft (10) in advance before welding.

[0022]

According to the present invention, one end of a lever for pivoting a valve shaft loosely fitted to a valve shaft is brought into contact with a fixed stopper in a state where one valve body is held at a fully closed position or a position close to a fully closed position, After the lever is fixed to the valve shaft in that state, the valve shaft is rotated until the other valve body reaches the fully closed or nearly fully closed position, and in that state the adjustment stopper abuts the lever. Since the adjustment stopper is adjusted, the positional relationship among the valve shaft, the fixed stopper, and the adjustment stopper can be accurately and easily set in correspondence with the position of each valve element when fully closed, which is significant.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment in which a valve device according to the method of the present invention is applied to an exhaust gas switching device of an automobile.

FIG. 2 is an enlarged end view of the valve device showing an upper half portion taken along line II-II in FIG.

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

FIG. 4 is a perspective view of the valve device, a part of which is shown in section.

FIG. 5 is an enlarged cross-sectional view showing the operation of the main passage and its valve body.

FIG. 6 is an enlarged cross-sectional view showing the operation of a sub passage and its valve body.

FIG. 7 is an end view in the vicinity of a lever that controls a valve shaft.

[Explanation of symbols]

(1) Bifurcated pipe (1a) (1b) Branch pipe (2) Flange joint (3) Main passage (4) Sub passage (5) Body (6) Main exhaust pipe (7) Bypass pipe (8) Shaft hole (9) ) (9 ') Valve shaft part (9a) Slot groove (10) Valve shaft (10a) Projection piece (11) Bushing (12) (13) Valve body (14) Hexagon bolt (15) Closure material (16) Sliding Split groove (17) End (18) Lever (19) Lever stop surface (20) Adjustment bolt (21) Shaft coupling (22) Lever pin (23) TIG all-around weld (24) Seal ring (25) Seal retainer ( V) Valve device

Claims (2)

[Claims] 1. A disc-shaped valve element that opens and closes each of the two fluid passages that are formed in the body and are parallel to each other, and each valve element is orthogonal to each of the passages. On the valve shaft rotatably arranged on the same axis, the other valve element is fully opened when one valve element is fully closed, and the other valve element is fully opened when the other valve element is fully closed. In the fluid control valve device fixed by, a method for initializing a turning range for restricting a turning range of the valve shaft, wherein one valve element is held at a fully closed position or a position close to a fully closed position, One end of a lever for pivoting the valve shaft loosely fitted to the valve shaft is brought into contact with a fixed stopper, and in this state, the lever is fixed to the valve shaft, and then the other valve body reaches a fully closed or nearly fully closed position. Rotate the valve shaft until it reaches the adjustment stopper so that it contacts the lever. Initial Setting range of rotation of the valve shaft in the fluid control valve apparatus characterized by adjusting the. 2. The method for initially setting the turning range of a valve shaft in a fluid control valve device according to claim 1, wherein the valve shaft and the lever are fixed to each other by welding.