JPH0718498Y2 - Valve seat charging device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat charging device for a valve valve body.

A valve is a valve for circulating or blocking a flow of fluid. It is provided in the middle of the fluid flow path. Valve box,
It is provided with components such as a valve body, a valve rod, and a valve seat. The valve body has a truncated cone shape or a cylindrical shape, and this is attached to the tip or the middle of the valve rod. 2. Description of the Related Art There is a valve rod that is screwed with a screw portion in a valve box and is rotated to move up and down. In addition, there are some which can be moved up and down by an external actuator without rotating. A valve seat is provided around the valve hole. A sealing sheet is inserted around the outer periphery of the valve element. The seat is made of an elastic material and is pressed against the valve seat to be appropriately distorted.

The sheet is made of an elastic material such as rubber. Since the fluid must not leak when shielded, the pressure will distort the sheet. Since the deformation is repeated after each use, it is permanently deformed or damaged. It must be replaced more often than the O-rings used to seal normal fixed parts.

Therefore, it is necessary to replace the valve seat periodically or at any time. Remove the valve handle and camp and pull out the valve stem. Hold the disc up and remove the old seat from the seat groove. Even though it is a sheet, it is an O-ring, so it can be easily removed by cutting a part.

[0005]

2. Description of the Related Art Next, a new ring-shaped sheet must be inserted into the groove. Since the valve body has a truncated cone shape, the seat can be loaded by placing the seat along the conical surface and pushing each part into the groove. This is done manually by the operator. However, this task is not so easy. The cross section of the groove has a shape such that the inlet is narrow and the inside is expanded. Therefore, it is difficult to push a part of the seat into the narrow entrance.

The sheet must not be twisted or even wavy. In other words, partly stretches in,
On the other hand, you can't just step in. It must be loaded in such a way that it has a uniform tension all around and is not twisted.

In order to do so, rather than pushing it into the groove from one place little by little, the sheet is put into the groove at one place, then the sheet is put at the opposite side and the third place Part of the sheet is inserted into the groove at a point in the direction perpendicular to and the parts are gradually inserted into the groove. Although it depends on the size of the valve body and the size of the seat, it is not easy to insert the ring-shaped seat into the groove because it requires force. If it is twisted or bumpy after entering it, it must be removed and replaced again.

[0008]

[Problems to be Solved by the Invention] Conventionally, an operator manually replaces the valve seat. This is not a trivial task, it also requires power. In addition, it is difficult for a person skilled in the art to put the sheet cleanly into the groove. This is a time-consuming task even for a skilled person. It would be excellent and convenient if this troublesome work could be performed using a machine.

Moreover, there are various types of valves, and there are various sizes and shapes of valve bodies. Naturally, the diameter of the sheet and groove,
There are various thicknesses and depths. It is said that the valve body has a conical shape or a truncated cone shape, but the apex angle of the cone, that is, the inclination angle of the cone generatrix and the diameter are various. In addition, there is a disc-shaped member which is not a cone but has a sheet attached to the lower surface of the disc. There has never been a device for inserting a sheet into the groove of a valve body having such various shapes and dimensions. A mechanism for holding a sheet in the vicinity of the groove and pushing the held sheet into the ring groove is difficult. The present invention aims to provide a device for semi-automatically loading a ring-shaped seat into the groove of a valve body.

[0010]

DISCLOSURE OF THE INVENTION A valve seat charging device according to the present invention comprises a rotary spindle that is provided to be inclined with respect to a horizontal plane, a rotary disc that is mounted on the rotary spindle and that is rotated by hand, and A valve pedestal that is fixed to the center and supports the valve element so that the groove appears above, and a groove of the valve element when the valve element is placed on the valve element pedestal and overlapped. Of the valve body, which has an outer peripheral surface up to the vicinity of, a pressing roller that presses the upper surface of the valve body, an elevating rod that can be moved up and down above the turntable, and a sheet pressing roller that is provided at the lower end of the elevating rod And a handle for raising and lowering the lifting rod,
It is characterized in that a ring-shaped seat put on the outer periphery of the groove of the valve body is pushed into the groove of the valve body by the sheet pressing roller.

[0011]

[Function] The valve disc pedestal, the valve disc, and the valve disc retainer are mounted on the turntable. The valve body retainer is axially retained by a retainer roller. A ring-shaped seat is inserted from above the valve body presser, and the outer peripheral wall of the valve body presser is slid and guided onto the groove of the valve body. The relative position between the sheet pressing roller and the valve element is adjusted so that the groove of the valve element exists immediately below the sheet pressing roller. The roller rotation surface of the sheet pressing roller is parallel to the tangential direction of the sheet.

By operating the handle, the sheet pressing roller is lowered and applied to the sheet above the valve groove. Further, the handle is rotated to lower the sheet pressing roller, and a part of the sheet is pushed into the groove by the roller. Next, the turntable is turned, a sheet pressing roller is applied to another part of the sheet, and the roller is lowered to push the sheet into the groove.

The same operation is performed at several places. The sheet enters the groove at these points. Further, while rotating the turntable, the sheet pressing roller is lowered, and the sheet is pushed into the groove even in the vicinity of the plural positions. Eventually all parts of the seat will enter the groove. Operate the handle with your right hand,
You can quickly and accurately perform the sheet insertion operation while rotating the turntable with your left hand.

In the case where the sheet is completely manually inserted as in the conventional case, it is difficult to hold the sheet immediately above the groove so as not to slip. I had to press the valve body and valve stem (also called shaft) with one hand and insert the seat into the groove with the other hand. In contrast, when the seat is temporarily fixed, the valve body is always held in a fixed position,
There is also an advantage that it is easy to apply force to the seat.
Work becomes easier and time is reduced.

[0015]

1 is a schematic perspective view of a valve seat charging device of the present invention. This only shows a schematic layout of the important elements. The horizontal plate 1 is the base of the whole, and all the mechanisms are built on the horizontal plate 1. A tilting plate 3 is supported on the horizontal plate 1 by a tilting mechanism 2. The tilt angle of the tilt plate 3 can be arbitrarily adjusted by the tilt mechanism 2.

On the inclined plate 3, there is provided a turntable 4 which is rotatably supported by a rotary shaft (not shown in FIG. 1). The turntable 4 is parallel to the inclined plate 3.

The valve body 5 is placed upside down on the turntable 4, and two members are used to fix the valve body.

FIG. 2 is a perspective view showing these members separately. These are lined up on a slanted line, but due to the limitation of the drawing method, they are drawn side by side in the vertical direction. At the bottom is the turntable 4, and then the valve body support 6. The valve body 5 and the valve body retainer 7 are mounted on this. Whether the valve body 5 is fixed at the correct position by the valve body cradle 6 and the valve body retainer 7, or some measures are taken for this purpose.

The turntable 4 has several circumferential holes 9 on its circumference. It does not have to be hand held and easy to turn. There is an inner hole 10 in the center of the turntable 4. This is the hole on which the positioning is based. The valve body 6 is a stepped cylindrical member, but has a small circle portion 11 at the bottom. The small circle 11 fits snugly into the inner hole 10 of the turntable 4. This determines the position of the valve pedestal 6.

A through hole 12 is bored in the valve body 6 in the axial direction. This is a hole for passing the valve rod 13 attached to the valve body 5. The position of the valve body 5 is determined by the sliding contact between the valve rod 13 and the through hole 12.

Since the valve body 5 and the valve rod 13 are integrated, they may be collectively called a shaft 14. Since the back surface of the valve body 5 faces upward, the groove 15 appears on the valve body 5.

The shape of the shaft 14 naturally varies. In some cases, the valve stem is fixed in the opposite direction from the bottom portion 16 and the valve stem is provided on both sides of the valve body. A through hole 17 is also formed in the valve body pressing member 7 so as not to get in the way even with such a valve rod.

The surface of the valve body 5 is often a conical surface, but the inner peripheral surface 18 of the valve body retainer 7 is an inverted conical surface that fits exactly with the conical surface of the valve body.

The shaft consisting of the valve body 5 and the valve rod 13 is sandwiched between the valve body cradle 6 and the valve body retainer 7 from above and below. The inner peripheral surface 18 of the valve body press fits to the conical surface of the valve body 5, and the upper surface of the valve body base 6 fits to the contact surface of the valve body 5. In addition, the through hole 12 of the valve body cradle 6 and the through hole 17 of the valve body presser are
Correctly hold the shaft center position.

The shaft 14 is correctly set at the axial center position by the valve base 6 and the valve retainer 7. Therefore, the radius of the groove 15 from the axis and the height in the axis direction are always constant.

FIG. 3 shows a vertical sectional view of this portion.
This is because the enlarged diameter portion 19 of the valve rod 13
Represents a state in which is fitted tightly. This is a little different from the valve body of Fig. 2 and extends slightly from the bottom of the valve body 2
Has 0. This is also a state in which it is properly supported by the through hole 17 of the valve body retainer 7.

The turntable 4 is fixed to the rotating main shaft 21 below the turntable 4. The rotary spindle 21 has a cylindrical shape,
It is hollow so as not to interfere with the valve rod 13. The rotating spindle 21 is mounted on the cylindrical dish-shaped bracket 2 by bearings 22 and 23.
4 is rotatably supported. The bracket 24 is fixed to the inclined plate 3 with bolts 25.

The mutual relationships among the valve disc support 6, the rotary disc 4, the valve disc 5, and the valve disc retainer 7 have been described above.

Returning to FIG. 1, the upper surface of the valve body retainer 7 is retained by the retainer rollers 26, 26. The valve body 5 and the valve body retainer 7 are not adhered to each other. They are also inclined.

If no pressure is applied from above, the valve body retainer 7 will loosen or will separate from the valve body 5. In order to avoid this, the upper surface of the valve body pressing member 7 can be pressed by the pressing roller 26 at two positions.

The pressing roller 26 is rotatably supported by a branch arm 27. The branch arm 27 is fixed to the tip of the pressing arm 28. The lower end of the presser arm 28 is pivotally connected to a mounting bracket 30 by a pin 29. The mounting bracket 30 is fixed to the inclined plate 3.

In addition to the presser arm 28, the presser handle 3
1 is provided, and the lower end of this is attached to the mounting bracket 30 by the pin 32.
Be pivoted to. The presser handle 31 and the presser arm 28 are connected by a link 34. The combination of the presser handle 31 and the presser arm 28 is called a toggle clamp 35. When the handle 31 of the presser foot is tilted toward the hand, the presser arm 28 is pulled up and the presser roller 26 is separated from the valve body presser 7. When the presser handle 31 is raised and pushed forward, the presser arm 28 is rotated by the action of the toggle clamp 35, and the presser roller 26 comes into contact with the upper surface of the valve body presser 7. This part will be described later.

After stacking up to the valve body retainer 7 in this way, the ring-shaped seat 8 is inserted from above the valve body retainer 7 and stopped near the groove 15 of the valve body 5.

The sheet insertion mechanism 36 for inserting the sheet 8 into the groove 15 will be described. A disk-shaped sheet pressing roller 37 is a member that comes into contact with and presses the sheet 8.
This is supported by the roller shaft 38 so as to be parallel to the vertical plane. Further, the tangent line at the contact point of the sheet and the vertical plane including the roller 37 are parallel to each other.

The roller shaft 38 is a roller support rod 3 in the vertical direction.
It is fixed at 9. The roller fixing collar 40 secures the roller support rod 39 to the elevating rod 41. The lift bar 41 is supported by a head 42 so as to be lifted and lowered. The spring 43 constantly applies an upward elastic force to the elevating rod 41. The head 42 is fixed to the horizontal plate 1.

The lifting mechanism may be one that is often used in heads of machine tools and the like. A handle shaft 44 extends horizontally from the head 42. The elevating rod 41 has a rack (not shown) which meshes with a pinion (not shown) at the inner end of the handle shaft 44. By rotating the handle 45 by hand, the lifting shaft 41 can be raised and lowered freely. As a result, the sheet pressing roller 37 is pressed against the sheet 8. Since the seat 8 is located just outside the groove 15,
The sheet 8 can be inserted into the groove 15 only by lowering the sheet pressing roller 37. FIG. 4 shows an enlarged sectional view of this portion.

The groove 15 has a wide interior and a narrow inlet. The inclination of the inlet portion and the inclination of the guide surface 46 at the lower portion of the peripheral wall of the valve body retainer 7 are the same, and they are flush with each other. By the action of the guide surface 46, the sheet 8 can stably exist in the vicinity of the groove 15.

The sheet 8 is a vertically asymmetric sheet having a wide width at the bottom and a narrow width at the bottom. Therefore, it is not easy to push the sheet 8 in from above. As shown in FIG. 4, the sheet 8 is laterally pressed by the side surface of the sheet pressing roller 37 to be contracted and then inserted into the groove 15.

As shown in FIG. 5, the sheet 8 is inserted into the groove 15 from a plurality of places. The numbers in FIG. 5 indicate examples of the insertion order. In this way, the insertion points are changed in the diagonal direction and gradually inserted. After the sheet enters the groove, check the surface condition of the sheet, remove any unevenness, and insert it again. If the sheet twists in, remove it and reinsert it.

When the fingers are used to insert the sheet 8, only the direct force of the fingers is applied. However, in the case of the present invention, since the force is multiplied by the length of the arm of the handle 45, the pressure for pushing the seat can be significantly increased. Further, since a large movement of the handle 45 is reduced to a slight displacement of the roller 37, the movement of the roller can be finely adjusted.

The above description clarifies the principle of the device of the present invention. Next, the entire apparatus according to the embodiment will be described. 6 is a front view of the entire apparatus, FIG. 7 is a right side view, FIG. 8 is a view taken along the line VIII-VIII in FIG. 6, and FIG. 9 is a sectional view taken along line IX-IX in FIG.

The main elements such as the turntable 4, the valve holder 6, the valve retainer 7, the retainer arm 28, and the sheet retainer roller 37 have been described and will not be repeated. The tilting mechanism 2 and the horizontal movement mechanism of the head will be described here. Two bottom plates 50 are welded to the lower surface of the inclined plate 3 at right angles thereto. A pair of brackets 51 are erected at one location on the horizontal plate 1. A part of the bottom plate 50 is rotatably supported by the pin 52 with respect to the bracket 51. A point above the bottom plate 50 is pivotally connected to the tip of the rod 54 by a pin 53. The diagonal rod 54 is connected to the lower rod 56 via a threaded rod 55. The rod 56 is pivotally connected to a bracket 57 standing on the horizontal plate 1 by a pin 58. The screw rod 55 has a rotary plate 590 in the middle thereof, which can be manually rotated. When the rotary plate 59 is rotated, the screw rod 55 rotates, and the distance between the upper and lower rods 54 and 56 increases or decreases. As the distance increases, the tilt angle of the tilt plate 3 increases. When the distance is reduced, the inclination angle of the inclined plate 3 is reduced. In this way, the tilt angle can be adjusted freely.

The reason why the inclination angle of the inclined plate must be variable is because the angles of the truncated cone surface and the disk surface of the valve body are various. Since the advancing angle of the sheet pressing roller 37 with respect to the truncated cone surface must be proper, the tilt angle must be adjusted.

Next, the positioning of the sheet pressing roller 37 will be described.

Since the inclination angle of the inclined plate changes and the size of the valve element and the radius of the groove also differ, the sheet pressing roller 37 must also be displaceable in the direction parallel to the roller shaft 38. Therefore, the head 42 can be moved horizontally.

The head 42 is fixed at one end to the top of the column 61 by a screw 60. The lower end of the column 61 is fixedly mounted on a slider 62 having a rectangular plate shape. The slider 62 can slide in the slide guide 63. The sliding direction of the slide guide 63 is the direction of the roller shaft 38.

A small block-shaped fixing portion 64 is provided at one end of the slider 62. One end of a screw rod 65 is fixed to the female screw hole of the fixing portion 64. A rotary plate support 66 is fixedly provided on the horizontal plate 1 in the middle of the screw rod 65. A rotary plate 67 is rotatably fitted in the fixed plate support 66. The inner surface of the rotary plate 67 is a female screw hole, and the screw rod 6
Screw to 5. Since the rotating plate 67 is the support 66, the screw rod 6
It does not move in the 5 direction. When the rotating plate 67 is rotated, the screw rod 65 moves back and forth. As a result, the slider 62 is displaced. When the slider 62 moves, the sheet pressing roller 37
Also moves by the same amount.

The toggle clamp 35 will be described with reference to FIG. This presses the pressing roller 36 onto the valve body pressing member 7 with an appropriate force. The lower end of the handle 31 is pin 3
It is pivotally supported by the mounting bracket 30 by means of 2. Presser arm 2
The end of 8 is also pivotally connected to a mounting bracket 30 by a pin 29.

A link 34 connects these two members. One end of the link 34 is pivotally connected to the holding handle 31 by a pin 70. The other end of the link 34 has a holding handle 3 supported by a pin 71 in the middle of the holding arm 28.
When 1 is pushed forward, the link 34 pulls the pressing arm forward, so that the pressing roller 26 comes into contact with the valve body pressing member 7. In this state, the pin 71 is slightly outside the line connecting the centers of the pins 70 and 32. The forward rotation of the presser handle 31 is suppressed by the pin 33 that is planted on the side surface of the presser arm 28. The holding arm 28 is supported by the positional relationship of the pins 71, 70, 32 so as not to fall backward. However, this bearing capacity is small. Hand presser handle 3
Pulling 1 backwards will easily rotate it. When the presser handle 31 rotates to some extent, the link 34 draws the presser arm 28, so that the presser roller 26 separates from the valve body presser 7.

When the presser handle 31 is further pulled,
It rotates further, but stops by hitting the pin 72. The presser arm 28 continued by the link 34 also stops at the fixed position at this time. Since the presser arm 28 stops far away from the rotary table 4, it does not interfere with the attachment / detachment of the valve body support 6, the valve body 5, the valve body presser 7, and the like.

[0051]

According to the present invention, the ring-shaped seat can be inserted into the groove of the valve body semi-automatically. While moving the turntable 4 little by little, operate the handle to insert the seat into the groove. If the positioning is accurate, the insertion of the sheet becomes extremely easy. There are few mistakes and little skill is required, and it can be done in a short time. It is an excellent idea.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a valve seat charging device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a rotary disc / valve pedestal, a valve body, a valve body retainer, a seat, and the like.

FIG. 3 is a vertical cross-sectional view of a combination of a turntable / valve support, a valve disc, and a valve retainer.

FIG. 4 is a partial enlarged cross-sectional view of a sheet pressing roller, a sheet, a valve body pressing member, and a valve body.

FIG. 5 is a diagram showing an example of the order of sheet insertion.

FIG. 6 is a front view of the entire valve seat charging device according to the embodiment.

FIG. 7 is a right side view of the whole.

FIG. 8 is a view taken along the line VIII-VIII in FIG. 6 (only in the vicinity of the rotary disk and the press roller).

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a front view of only a toggle clamp portion.

[Explanation of symbols]

 1 horizontal plate 2 tilting mechanism 3 tilting plate 4 rotating plate 5 valve disc 6 valve disc support 7 valve disc retainer 8 seat 9 side hole 10 inner hole 12 through hole 13 valve rod 14 shaft 15 groove 16 bottom 17 through hole 18 inside Circumferential surface 26 Presser roller 27 Branch arm 28 Presser arm 31 Presser handle 37 Sheet presser roller 38 Roller shaft 41 Lifting rod 42 Head 43 Spring 44 Handle shaft 45 Handle

Claims (1)

[Scope of utility model registration request] 1. A rotary main shaft which is inclined with respect to a horizontal plane, a rotary disc which is mounted on the rotary main shaft and rotated by hand, and a valve body which is fixed to the center of the rotary disc and appears on a groove. And a valve body presser having an outer peripheral wall up to the vicinity of the groove of the valve body which is placed on the valve body pedestal It consists of a presser roller that presses the upper surface of the presser, an elevating rod that can be raised and lowered above the turntable, a sheet pressing roller that is provided at the lower end of the elevating rod, and a handle for operating the elevating rod.
A valve seat loading device characterized in that a ring-shaped seat put on the outer periphery of the groove of the valve body is pushed into the groove of the valve body by a sheet pressing roller.