JPH067867Y2 - Seat ring insertion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a seat ring insertion device for automatically inserting a seat ring having a larger diameter than the inner circumference of a valve body when assembling a butterfly valve.

[Prior Art] A butterfly valve is used for the purpose of controlling the flow rate, etc. by being installed in a fluid piping line. One of the valves is one having a structure as shown in FIG. 13 and FIG. is there. That is, in this type of valve, a seat ring (valve seat) R with both flanges made of an elastic body (made of hard rubber) is provided on the inner circumference of a valve body V made of a rigid body, and a flange F on both sides of the seat ring R The V is tightly fitted so as to be sandwiched from the circumferential grooves G on both sides. Then, alignment shaft hole H _V which is perforated respectively in the valve body V and the seat ring _R, H V, _{H R,} and H _R in a vertical position in the diameter direction, the lower portion of the valve body V to these shaft hole A valve shaft (valve rod) S is rotatably inserted through a shaft hole H of a support cylinder portion P connected to the shaft S, and a butterfly (valve body) B slidably contacting the seat ring R is axially supported by the shaft S. ing.

In this type of valve, the shaft hole H _R that is open to the seat ring _R, around the H _R, for the purpose of enhancing the sealing properties relative to the valve shaft S, small secondary ring r is fitted. This secondary ring r is for the function of tightening the Kakujikuana H _R, before assembly, is loaded in advance by press-fitting or adhesion to the annular groove g which is recessed on the outer peripheral surface of the seat ring R.

A pedestal portion PS is provided at the lower end of the support cylinder portion of the valve body V, and mounting holes H _S and H _S are opened on both sides of the pedestal portion PS.

By the way, when assembling the above valve, since the outer diameter of the seat ring R is larger than the inner diameter of the valve body V,
It is necessary to deform the elastic seat ring R to make it smaller than the inner diameter of the valve body V and then insert the seat ring R into the valve body V.

Since such deformation and insertion work is not suitable for mechanization, it is in the present situation that it is performed manually. At that time, conventionally,
The commonly used insertion method is as shown in FIG. 15, in which the seat ring R is forcibly twisted and reversed by about 180 ° on one side on the circumference to create a stable reduced diameter state. Generally, the reduced seat ring R is inserted into the inner circumference of the valve body V, and then the flange portion F is fitted into both side circumferential grooves G of the valve body V while returning to the original posture in the body V. Method.

[Problems to be solved by the invention] However, according to the above-mentioned manual work, since the seat ring is functionally molded from a considerably hard rubber, if a large one is repeatedly deformed, the operator's fingertips and arms are hurt. You will be forced to do some hard work. Further, in order to align the shaft hole of the seat ring with the shaft hole of the valve body and insert it with high accuracy, skill and a fine nerve are required for the work. For this reason, a labor-intensive and labor-intensive work is required to assemble this kind of butterfly valve.

In view of such a situation, the present invention has a large-diameter seat ring for the valve body, even if it has a complicated and large-sized flange portion, or if it is a thick product having rigidity itself. The present invention newly provides a seat ring insertion device devised so as to be surely automatically inserted and assembled.

[Means for Solving the Problem] The seat ring insertion device of the present invention is a ring deforming mechanism that deforms a seat ring by twisting about 90 ° at only one position on the circumference, and is deformed by this ring deforming mechanism. A device comprising a main body positioning mechanism for externally inserting a valve main body into a seat ring and positioning the valve main body at a concentric position. A seat ring retainer for pressing toward the valve body and a body clamp for fixing the valve body from the side opposite to the seat ring retainer are provided.

[Operation] In this device, first, the ring deformation mechanism is operated to give the seat ring a twisted deformation of about 90 ° only at one position on the circumference. Due to this deformation, the twisted side is pulled up against the fixed side to stand upright, and the periphery of the twisted side is inclined and escaped rearward. When the main body positioning mechanism is operated in this state, the twisted side escapes rearward and the diameter is reduced, so that the valve main body can be extrapolated from the front right above the fixed side. Then, from this inserted state, the valve body is positioned concentrically with the seat ring. At this time, the fixed side of the seat ring is fitted to the inner circumference of the valve body.

At this time, while the valve body is fixed from the opposite side with the body clamp, both sides of the seat ring are pushed by the seat ring retainer toward the valve body. Then, the seat ring is tightly fitted to the valve body with the fixed side as a starting point and both sides thereof.

After that, when the ring deformation mechanism is reversely actuated and the twisted side of the seat ring is untwisted, the outer circumference of the seat ring on the twisted side follows the fixed side and both sides that have already been fitted. When the twisted side is returned to the original posture, the entire circumference of the seat ring is automatically completely fitted with the valve body.

[Embodiment] An embodiment of the present invention will be illustrated and specifically described below.

1 and 2 show a preferred embodiment of the seat ring insertion device according to the present invention.

In this device, the seat ring R is about 9
Main mechanisms are a ring deformation mechanism 1 that applies 0 ° twist and deforms it, and a body positioning mechanism 2 that externally positions the valve body V on the seat ring R deformed by the ring deformation mechanism 1 and positions the valve body V at a concentric position. Configured as.

Hereinafter, each mechanism will be described in detail.

The ring deformation mechanism 1 is located in the upper part of the figure, and holds the seat ring R in one place of the lower part to fix the seat ring R, and the seat ring R in one place of the upper part. Then, the rotation unit 4 which performs an operation of twisting the seat ring R within a range of about 90 ° or returning the twist
It consists of and.

As shown in FIG. 2, the fixing unit 3 supports the fixing plate 7 on the front end of a support plate 6 standing on the base 5, and the seat ring R of the seat ring R is attached to the lower surface of the front end of the fixing plate 7. constructed by projecting the lower support pins 8 which lower portion shaft hole H _R is挿支.
In this case, the lower receiving pin 8 has a structure in which it is retractably housed in a holder block 9 fixed on the upper surface side of the fixed plate 7 via a spring 10. The fixed unit 3 has an operating posture in which the fixed plate 7 extends horizontally forward (solid line in the figure).
And a center position of the fixed plate 7 is swingable with respect to the support plate 6 so that the front end of the fixed plate 7 can be swung up upward (a two-dot chain line in the figure). Has been done. Then, links 13 and 14 are connected to the base end portion of the fixed plate 7 and the bracket 12 fixed to the support plate 6 below the fixed plate 7 by pivotally supporting the ends 15 and 16, respectively, to connect the links 13 and 14. , 14 are pivotally connected to an arm 17 coaxially 18, and the arm 17 is connected to a cylinder rod 19a of a cylinder 19 arranged rearward.
The posture of the fixed plate 7 can be changed by the expansion and contraction operation of 9. Reference numeral 20 denotes a ring stopper provided directly below the fixed plate 7 and on the front side of the support plate 6.

On the other hand, as shown in FIG. 2, the rotary unit 4 is provided with a rotary plate 21 arranged in parallel with the fixed plate 7 in the working posture, and swingable on the rotary plate 21 and movable back and forth. The upper clamp 23 is held and is comprised. Rotating plate 2
1, butt with a tip portion 21a is projected forward is throttled to narrow, on the upper surface side of the distal end portion 21a, the upper support pins 22 which挿支the upper portion shaft hole H _R of the seat ring R I have set up. The upper receiving pin 22 is located at a vertical concentric position with the lower receiving pin 8.

The upper clamp 23 is supported by a cylinder 25 attached to a bracket 24 fixed to the upper surface of the base end portion of the rotary plate 21. That is, a forked support tool 26 is fixed to the tip of a cylinder rod 25a extending forward from the cylinder 25, and the upper clamp 23 is positioned on the support tool 26 at a position in front of its center of gravity and is swingable by a support shaft 27. Is fastened to. The upper clamp 23 is advanced by the extension operation of the cylinder 25 from the standby position indicated by the chain double-dashed line in FIG. 2, and is fixed to the lower surface of the base end side of the upper clamp 23 to the lower surface side of the base end of the rotary plate 21. A cylinder rod 28a protruding upward from the cylinder 28 is brought into contact with the cylinder 28,
2 is held in the operating posture shown by the solid line in FIG. At this time, the tip portion 23 a of the upper clamp 23 is guided between the guide members 29, 29 fixed to the upper surface of the rotary plate 21, arrives directly above the upper receiving pin 22, and becomes parallel to the rotary plate 21. Retained. The tip 23a of the upper clamp 23
Has a tapered shape whose lower surface is in close contact with the outer periphery of the seat ring R.

The rotary unit 4 includes a rotary plate 21 and an upper clamp 23.
And two cylinders 2 for operating the upper clamp 23
5, 28 are united so that they can rotate (counterclockwise in FIG. 2) about the fulcrum O within an angle range of about 90 °. More specifically, as shown in FIG. 1, both ends of the rotary plate 21 have side plates 30 and 3 provided on both sides.
Crankshaft (shaft center O) 31, which is rotatably supported at 0,
It is connected to crank arms 32, 32 that are opposed to 31. Then, the crankshaft 31 protruding from one of the side plates 30 and the rotor shaft 34a of the rotor 34 mounted on the bracket 33 fixed to the side plate 30 are
The bevel gears 35 and 36 meshed in the orthogonal direction are engaged with each other to transmit the rotational movement of the rotor shaft 34a to the crankshafts 31 and 31, thereby rotating the rotary plate 21 to the crankshafts 31 and 31.
It is configured such that it can rotate forward and backward around the axis O (fulcrum) O of 31. At this time, the fulcrum (rotation center) O of the rotation unit 4
Is positioned near the upper end of the rear end face of the seat ring R set on the upper receiving pin 22. The rotor 34 is provided with a rotation stopper (not shown) for freely setting the rotation angle and stopping the rotation angle.

Next, the main body positioning mechanism 2 will be described. Same mechanism 2
Is a lower part in the figure, and a main body holding body 37 for holding the valve main body V, and a second body for moving the main body holding body 37 up and down and rocking to position the valve main body V at a predetermined insertion position. The two cylinders 38 and 39 are main elements.

The main body holder 37 is provided with a pedestal 40 on which the support tube pedestal PS of the valve body V is placed, a long pin shaft 41 vertically projecting from the center of the upper surface thereof, and projecting from both sides of the pin shaft 41. The shaft hole H, which is composed of a pair of receiving pins 42, 42 and penetrates through the support cylinder portion P of the valve body V, is opened in the pin shaft 41 and in the support cylinder portion pedestal PS. _S ,
Fitted respectively H _S to support pins 42 and 42, the valve body V is made to be stably inserted on the pedestal 40.

In the main body holder 37, a connecting portion 43 continuously provided on the lower surface of the pedestal 40 is sandwiched by a lower pedestal 44, and is pivotally supported by the pedestal 44 by a support shaft 45. The pedestal 44 is fixed on its lower surface to a bracket 46 attached to the lower portion of the support plate 6 in an upright posture.
The cylinder rod 38a of is connected. Thus, when the cylinder 38 is operated, the guide rod 4 in which the cylinder rod 38a is inserted into the support plates 47, 47 arranged side by side.
8 and 48 expand and contract to raise and lower the pedestal 44, and in conjunction with this, the main body holder 37 holding the valve main body V is moved up and down. At this time, the main body holder 37 is lifted and lowered in an upright posture in which the pin shaft 41 is located on the ring deforming mechanism 2 at a concentric position vertically below the lower receiving pins 22 and 8.

A swing plate 49 is provided on the body holder 37 so as to project from the rear end of the pedestal 40. An arm 50 is swingably supported by the swing plate 49, and at the same time, an arm 50 is attached to the arm 50. The cylinder rod 39a of the cylinder 39 arranged at the rear side is connected to the main body holder 37 by the expansion and contraction operation of the cylinder 39.
The posture can be changed between a standby posture tilted forward (two-dot chain line in FIG. 2) and an upright working posture (solid line in the figure).

In addition to the basic mechanism described above, the seat ring insertion device includes a seat ring retainer 52 for pressing both sides of the seat ring R from the rear during deformation insertion, and a valve body that is also brought into contact with both sides of the valve body V from the front. The seat ring retainer 52, which is provided with a pair of main body clamps 53, 53 for fixing the main body V, is located at an intermediate position between the fixed plate 7 of the fixed unit 3 and the rotary plate 21 of the rotary unit 4. It is composed of a planar U-shaped member that is arranged in a branched manner so as to bypass the cylinder 28 from both sides. The seat ring retainer 52 is a cylinder rod 56a of a cylinder 56 which is attached via a bracket 55 to a frame 54 horizontally arranged behind the support plate 6.
Is connected and supported by the cylinder 56, and moves back and forth in conjunction with the expansion and contraction of the cylinder 56, and in the forward state, the tip ends of the fixed unit 3 (underlying pin 8) and the rotation unit 4 of the ring deformation mechanism 1.
The upper ring 22 is brought into contact with both sides of the seat ring R held by the upper support pin 22.

On the other hand, the main body clamps 53, 53 are located in front of the support plate 6, and are arranged in a left-right pair in a state of being inclined from the outer side to the inner side when viewed from the front in order to facilitate the loading and unloading of the valve body V. There is. Each main body clamp 53 is swingably supported by a cylinder 57 whose base end side (not shown) is firmly held in an upright state and an arm 59 which is pivotally supported by the upper end of the cylinder 57. The rocking plate 61 is in contact with the cylinder rod 57a of the cylinder 57 on the lower surface side, and the pressing rod 62 is erected on the front upper surface side of the rocking plate 61. When the cylinder 57 is extended from the standby position and the rocking plate 61 is pushed up, the pressing rod 62 pivots upward and its tip portion 62a.
Are abutted at right angles on both sides of the valve body V positioned by the body positioning mechanism 2.

Next, the operation of the seat ring inserting device having the above structure will be sequentially described with reference to FIGS.

With the ring deformation mechanism 1 and the body positioning mechanism 2 in the standby position (the state shown by the chain double-dashed line in FIG. 2), the seat ring R is used as the ring deformation mechanism 1 and the valve body V is used as the body positioning mechanism 2. Set each. In particular,
Seat ring R is allowed to hung vertically hooking the upper portion shaft hole H _R on support pins 22 of the rotary plate 21, the valve body V is inserted into the body holding member 37. From this state, first, when the cylinder 19 on the side of the fixed unit 3 is extended to return the fixed plate 7 to the horizontal posture, the lower receiving pin 8 projecting from the lower surface of the tip of the fixed plate 7 automatically moves to the seat ring. Lower shaft hole of _R H _R
The seat ring R is firmly positioned and held by the fixed plate 7 and the rotary plate 21. Then, after holding the seat ring R, the cylinder 25 is extended, and then the cylinder 28 is extended and raised to keep the upper clamp 23 in an operating state. At this time, the tip portion 23a of the upper clamp 23 is
Flange portion F of the seat ring R, while being in close contact with the groove between F, tightly constrains the periphery of the shaft hole H _R that includes a secondary ring r (see above Figure 2).

In this way, when the pressing of the seat ring R is completed, the rotor 3
4 is rotated to rotate the rotation unit 4 about the fulcrum O by about 90 ° as shown in FIG. FIG. 8 shows an outline of the deformation of the seat ring R at this time, and FIGS. 9 (a) and 9 (b) show the state of the seat ring R after the deformation. That is, as shown in FIGS. 3 and 8, when the seat ring R is fixed by pressing one lower part on the circumference and gripping one upper part on the opposite side and twisting it by about 90 ° When viewed from the front, the seat ring R is pulled upward and has an elliptical shape, as shown in FIG. 9 (a).
Also, when viewed in a vertical cross section as shown in FIG. 2B, the upper twisted side is upright with respect to the lower fixed side, and the twisted side and its peripheral portion escape rearward while tilting in an arc shape from the middle. Becomes

In this state, as shown in FIG. 3, when the cylinder 56 is extended and the seat ring retainer 52 is pressed against the seat ring R by contacting both sides of the seat ring R, the outer diameter of the seat ring R positioned immediately above the fixed side is fixed. Becomes smaller. And
In this reduced diameter state, the cylinder 39 is retracted, and the main body holder 3
When 7 is changed from the initial forward leaning posture to the upright posture, the valve body V inserted into the body holding body 37 comes from the front while swirling from the front, and smoothly comes on the seat ring R as shown in FIG. Can be extrapolated.

Next, the operation of positioning the valve body V at the concentric position with the seat ring R is performed. That is, the cylinder 56 is retracted and the seat ring retainer 52 is once retracted, and then the cylinder 38 is extended to make the main body holder 37 and the valve body V together.
Raise. Then, as shown in FIG. 4, the valve body V
And the seat ring R are concentrically positioned. At this time, the tip portion 41a of the pin shaft 41 projecting from the body holding member 37 is raised through the shaft hole H _V of the valve body V, it will be a collision between the lower support pins 8 of the fixing plate 7 . In the positioning state of FIG. 4, as shown in FIG. 10, the seat ring R
On the lower fixed side of the, the both side flange portions F, F are fitted tightly into the both side circumferential grooves G, G of the valve body V.

Then, in this state, as also shown in FIG. 4, each cylinder 57 is extended and the left and right body clamps 53, 53 are brought into contact with both sides of the valve body V from the front to fix the valve body V. Then, the cylinder 56 is extended to bring the seat ring retainer 52 into contact with both sides of the seat ring R again from the rear side so that the seat ring R is pushed in. , F fit tightly into the circumferential grooves G, G of the valve body V.

That is, when the seat ring R is flexible, the flange portion F,
If F is relatively small, seat ring retainer 5
It can be expected that the seat ring R can be smoothly inserted even if the above-described pushing stroke by 2 is omitted. However, when the seat ring R has complicated and large flange portions F, F, or the seat ring R itself has rigidity. In the case of a thick product, it is indispensable to tightly fit both sides of the seat ring R to the valve body V as described above at this stage in order to reliably prevent defective insertion.

Then, this time, the rotation unit 4 is reversed, and the seat ring R moves to the process of untwisting the upper twisted side. At this time, as shown in FIG. 5, the rotor 34 is reversely rotated to reverse the rotation unit 4 by about 40 °, and the rotation is temporarily stopped. In this state, the upper clamp 23, which holds the upper twisted side of the seat ring R between the rotary plates 21, is released. Specifically, the cylinder 28 is retracted to release the pressing of the upper clamp 23, and then the cylinder 25 is retracted to cause the upper clamp 23 to be obliquely upwardly retracted from the gap between the seat ring R and the valve body V to be retracted. . At this time, as shown in FIG. 11, the seat ring R is placed in a state in which only the vicinity of the upper twisted side protrudes rearward.

In this way, the upper clamp 23 is detached, the seat ring retainer 52 is retracted at the same time, and then the rotating unit 4 is further inverted by about 50 ° to return to the original horizontal posture as shown in FIG. R is the flange portion F on the upper twist side while the rotary plate 21 is held, and F is the valve body V.
As shown in FIG. 12, the seat ring R is completely inserted and assembled, as shown in FIG.

In the above process, since the fixed side and both sides of the seat ring R have already been fitted to the valve body V, the upper clamp 23
Even if the presser foot is released, the twisted side is held and guided by the upper receiving pin 22 of the rotating plate 21 and is fitted tightly to the inner peripheral upper surface side of the valve body V. Then, when the rotary unit 4 is returned to the start position, the left and right body clamps 53, 53 are also inverted to the standby position.

However, in this device, in this state, the upper and lower receiving pins 22,
Since 8 is still engaged with the shaft holes H _R , H _R of the seat ring R, the valve body V cannot be taken out. Therefore, as shown in FIG. 7, by about 90 ° forward in the rotational unit 4 again, the upper support pins 22 together with the rotation plate 21 is removed from the shaft hole H _R of the seat ring R, degenerate Thereafter, the cylinder 38 After lowering the main body holder 37, the cylinder 3
When 9 is extended and the main body holder 37 is tilted forward, the valve body V initially inserted into the main body holder 37 in an empty state is returned in the assembled state with the seat ring R inserted in the inner periphery. Then, if the rotary unit 4 is inverted to the horizontal posture while the assembly is taken out, the entire apparatus is returned to the standby posture at the start, the next cycle can be started, and continuous operation becomes possible.

As described above, according to the present device, by combining the ring deformation mechanism 1 and the main body positioning mechanism 2 as described above, it is possible to automatically perform the difficult and tired insertion work of the seat ring R into the valve main body V. You can That is, the operator only needs to first set the seat ring R and the valve main body V, and only take out the assembly from the main body holder 37.

In addition, in this insertion device, in addition to the ring deforming mechanism 1 and the main body positioning mechanism 2, a seat ring retainer 52 and main body clamps 53, 53 are installed, and the seat ring R is deformed in a predetermined deformed state. When inserting the seat ring R from the fixed side, both sides of the seat ring R are pushed into the valve body V and before the seat ring R is untwisted,
Since both sides of the seat ring R can be completely fitted to the valve body V, it is possible to surely prevent the seat ring R from partially (on the twisted side) the insertion failure with the valve body V.

The device configurations and operating mechanisms of the seat ring retainer 52 and the body clamps 53, 53 mounted on the insertion device are not limited to those exemplified in the embodiments.

[Advantages of the Invention] As described above, according to the seat ring insertion device of the present invention, it is possible to automatically insert and assemble an elastic seat ring having an outer diameter larger than the inner diameter of the valve body. Therefore, labor saving and efficiency of the work can be achieved as compared with the conventional manual work. With the seat ring retainer and body clamp installed as an additional mechanism, the deformed seat ring can be pushed into the valve body from both sides when necessary, so the shape of the seat ring is difficult to insert into the valve body. Even in this case, it can be automatically inserted without failure, and the reliability of the device is enhanced.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a front view of the seat ring insertion device, and FIG. 2 is a side view of the same. 3 to 7 are side views of the essential parts showing the insertion process of the apparatus. 8 to 12 show the transition of the seat ring deformed by the seat ring insertion device, FIG. 8 is a longitudinal sectional view of the seat ring showing the outline of the deformation method, and FIG. 9 (a) is a view after the deformation. A front view of the seat ring, the same figure (b) is a vertical cross-sectional view, FIG. 10 is a vertical cross-sectional view showing the seat ring fixed side insertion state to the valve body, and FIG. 11 is a seat ring fixed side to the valve body and FIG. 12 is a vertical sectional view showing the inserted state of both sides, and FIG. 12 is a vertical sectional view showing the seat ring completely inserted into the valve body. 13 and 14 show a butterfly valve according to the present invention, FIG. 13 is a broken exploded perspective view, and FIG. 14 is a longitudinal sectional view of an essential part in an assembled state. FIG. 15 is a side view of a modified seat ring showing a conventional insertion method. V ...... valve body, G ...... side circumferential groove P ...... support leg, PS ...... pedestal H _S ...... mounting holes, S ...... valve shaft B ...... _{butterfly, H, H V, H R} ...... axis Hole R ... Seat ring, F ... Flange r ... Secondary ring, g ... Annular groove O ... Support point 1 ... Ring deformation mechanism, 2 ... Main body positioning mechanism, 3 ... Fixed unit, 4 ... Rotating unit 7: Fixed plate, 8: Lower receiving pin 21: Rotating plate, 22: Upper receiving pin 23: Upper clamp, 31 ... Crank shaft 32 ... Crank arm, 34 ... Rotor 35, 36 ...... Bevel gear, 37 ...... Main body holder 40 ...... Pedestal, 41 ...... Pin shaft 19, 25, 28, 38, 39 ...... Cylinder 52 ...... Seat ring retainer 53 ...... Main body clamp, 61 ...... Swing plate 62 ... Presser rod, 62a ... Tip

Claims (1)

[Scope of utility model registration request] 1. A seat ring having a circumference of about 90 at only one position.
A device provided with a ring deforming mechanism for giving a twist and deforming it, and a main body positioning mechanism for externally positioning a valve main body on a seat ring deformed by the ring deforming mechanism and positioning the valve body at a concentric position. A seat ring retainer that presses both sides of the seat ring toward the valve body when the valve body is positioned concentrically with the seat ring and a body clamp that fixes the valve body from the opposite side of the seat ring retainer are provided. A seat ring insertion device characterized by the above.