JP2005172154A - Cut-off valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cut-off valve generating no deviation of opening/closing position of a valve in an electrically driven valve applied to fluid cut-off devices such as a gas cut-off device. <P>SOLUTION: A projection 20 is provided in a rotary shaft through hole 21 of a flange 22, and a cutout of a skirt 18 with the cutout is brought into contact with the projection. The constitution preventing corotation by directly engaging a main body of the flange 22 with a valve element 15 improves operational accuracy of opening/closing valves of the valve element 15 and enhances the certainty. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention uses a safety valve (international patent classification F16K 17/36) that operates according to an external situation and uses an electric motor as an operation means (international patent classification F16K 31/04), in particular, a gas shut-off device that prevents a gas accident in advance. More specifically, the present invention relates to a shutoff valve used as a shutoff mechanism, and more specifically, a motor that performs a shutoff return operation of the flow path by moving the valve body forward or backward relative to a valve seat formed in the flow path is used as a power source. It relates to the shut-off valve.

  Conventionally, this type of shut-off valve has a stud portion formed in a cap, and a hole in which the stud fits into the valve body, and converts the rotational motion of the rotor into a linear motion (see, for example, Patent Document 1). .

FIG. 5 shows a conventional shut-off valve described in Patent Document 1. As shown in FIG. As shown in FIG. 5, it is comprised from the valve body 9 provided with the flange 1, the stator 2, the rotor 5 provided with the rotating shaft 4 with the lead screw 3, the cap 7 provided with the stud 6, and the fitting hole 8. As shown in FIG. Yes.
Japanese Patent Laid-Open No. 11-2351

  However, in the conventional configuration, in order to convert the rotational movement of the rotary shaft into a linear motion with a lead screw, the stud formed on the cap is inserted into the hole of the valve body to stop the jointing of the valve body.

  However, when the rotational force of the valve body is applied to the cap, the cap rotates, and the valve opening / closing position deviates from the set position, resulting in incomplete shutoff or insufficient flow.

  The present invention solves the above-described conventional problems, and the valve opening and closing position is shifted by stopping rotation of the valve body with a flange that serves as a chassis that fixes the entire shut-off valve to the mounted portion. The object is to provide a reliable and reliable shut-off valve.

  In order to solve the conventional problems, the shutoff valve of the present invention has a structure in which the flange and the valve body are fitted so that the valve body does not rotate together.

  As a result, no force is applied to the structurally unstable cap, so that the valve opening and closing position of the valve body will not be inadvertently shifted. A high shutoff valve can be provided.

  Since the shut-off valve of the present invention has a structure in which the valve opening / closing position of the valve body is not inadvertently shifted, the certainty of the valve opening / closing can be improved.

  According to a first aspect of the present invention, there is provided a stator, a metal partition disposed inside the stator and shaped like a pan, a rotor including a rotary shaft with a lead screw disposed inside the partition, A valve body disposed on a lead screw, a metal lid coaxially disposed at an open end of the partition wall and having a hole through which the rotating shaft can pass in the center; By providing a flange that joins the partition wall and the lid, and as a shut-off valve in which the flange and the valve body are fitted as a rotation stop of the valve body, it serves as a chassis that is fixed to the mounted portion. By blocking the rotation of the valve body with the flange that performs the above operation, it is possible to provide a highly reliable shut-off valve in which the valve opening / closing position is not inadvertently shifted by the force of the valve body.

  In the second invention, in particular, the rotation stop of the valve body according to the first invention is provided with a protrusion in the rotation shaft through hole of the flange, and the flange of the valve body is fitted with the protrusion of the rotation shaft through hole. By forming the notch portion, it is possible to realize rotation prevention with a simple structure without attaching new parts to the flange and the valve body.

  In particular, the third aspect of the invention relates to the first embodiment of the valve body according to the first aspect of the invention, in which the rotation shaft through hole of the flange is formed in a non-circular shape, and the flange is substantially the same in shape and smaller than the rotation shaft through hole. By configuring the valve body with the portion, no protrusions or notches are required in the flange and the flange portion of the valve body, and the rigidity can be improved and a highly reliable structure can be achieved.

  According to the fourth aspect of the present invention, in particular, the rotation stop of the valve body according to the first aspect of the invention is provided with a rotation stop hole or projection other than the rotation shaft through hole of the flange on the flange, and the projection or hole mating with the hole is formed on the valve body By doing so, since the rotating shaft through-hole of a flange can be made small, it becomes possible to make the rigidity of a flange high.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a cross-sectional view of the shut-off valve in the first embodiment of the present invention. In FIG. 1, a partition wall 13 covers a rotor 12 including a rotary shaft 11 with a lead screw 10, and a lid 14 having a bearing portion is disposed on the lead screw side of the partition wall.

  As shown in FIG. 2, the valve body 15 inserted into the lead screw 10 has a notch 18 a having a notch portion 18 a that prevents co-rotation with the bend rubber 16 and the female screw portion 17 fitted into the lead screw 10. It is comprised with the bengal rubber | gum 19 provided with.

  Furthermore, the flange 22 provided with the rotating shaft through hole 21 with the protrusion 20 for stopping the rotation of the valve body 15 is integrated with the stator 23 by caulking or the like.

  The operation and action of the shut-off valve configured as described above will be described below.

  First, the rotor 12 is rotated by the current passed through the stator 23, and the notch 18 a of the flange portion 18 of the rubber bezel 19 into which the lead screw 10 of the rotating shaft 11 is inserted is caught on the protrusion of the flange 22, and the valve body 15 By stopping the co-rotation, the valve body 15 can be directly moved in the thrust direction.

  As described above, in the present embodiment, in order to stop the joint rotation of the valve body 15, the protrusion 20 is provided in the rotation shaft through hole 21 of the flange 22, and the protrusion 20 is notched in the flange portion 18 of the rubber band 19. As a result, the movement of the valve body 15 is converted into a linear motion. Therefore, by applying a rotational force to a rigidly unstable portion as in the prior art, the valve closing does not shift, You can change direction.

  Further, in the present embodiment, by providing a plurality of protrusions 20 of the rotary shaft through-hole 21 around the rotary shaft 11, no component force in the direction of tilting the rotary shaft 11 is applied when the rotary motion is received. Thus, it is possible to prevent the valve body 15 from shifting in the radial direction.

(Embodiment 2)
FIG. 3 is a perspective view of the flange and valve body of the shutoff valve according to the second embodiment of the present invention. In FIG. 3, reference numeral 24 denotes a non-circular rotary shaft through hole provided in the flange 25, and 27 denotes a rubber bezel having a flange portion 26 having substantially the same shape as the rotary shaft through hole 24. Is configured.

  The operation and action of the shut-off valve configured as described above will be described below.

  First, the rotation operation of the rotor 12 is transmitted to the valve body 28 through the rotary shaft 11. And since the flange part 26 of substantially the same shape has entered into the non-circular rotating shaft through hole 24 of the flange 25, the valve element 28 cannot be rotated and converted to a movement in the thrust direction.

  Further, in the present embodiment, it is possible to make the rotary shaft through hole 24 and the flange portion 26 of the rubber bezel 27 simple, and it is possible to make a structure with high rigidity and high reliability.

(Embodiment 3)
FIG. 4 is a perspective view of the flange and valve body of the shutoff valve according to the third embodiment of the present invention. In FIG. 4, reference numeral 29 denotes a rotation stop hole other than the rotation shaft through hole 31 of the flange 30, and is configured so that the protrusion 33 of the valve body 32 is fitted.

  The operation and action of the shut-off valve configured as described above will be described below.

  First, the rotating operation of the rotor 12 is transmitted to the valve body through the rotating shaft 11. Next, since the protrusion 33 of the valve body 32 enters the rotation stop hole 29 other than the rotation shaft through hole 31 of the flange 30, the valve body 32 cannot be rotated and is converted into a movement in the thrust direction. Become.

  As described above, since the shut-off valve according to the present invention has a structure in which the valve closing position and the valve opening position of the valve body are not inadvertently shifted, it is possible to improve the reliability of the valve closing, and therefore, other than gas. It can also be applied to other fluid shutoff valves.

Sectional drawing of the cutoff valve in Embodiment 1 of this invention The perspective view of the flange and valve body in Embodiment 1 of this invention The perspective view of the flange and valve body in Embodiment 2 of this invention The perspective view of the flange and valve body in Embodiment 3 of this invention Cross-sectional view of a conventional shut-off valve

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lead screw 11 Rotating shaft 12 Rotor 13 Bulkhead 14 Lid 15, 28, 32 Valve body 18, 26 Gutter part 18a Notch part 20 Protrusion 21, 24, 31 Rotating shaft through-hole 22, 25, 30 Flange 23 Stator 29 For rotation prevention hole

Claims (4)

A stator, a metal partition disposed inside the stator, a rotor including a rotating shaft with a lead screw disposed inside the partition, and a valve body disposed on the lead screw; A metal lid that is coaxially disposed at the open end of the partition wall and has a hole through which the rotating shaft can pass in the center, and a flange that is fixed to a mounted portion and that joins the stator, the partition wall, and the lid. A shutoff valve in which the structure of the rotation stop of the valve body is configured such that the flange and the valve body are engaged with each other. 2. The shutoff valve according to claim 1, wherein the structure of the rotation stop of the valve body is provided with a protrusion in the rotation shaft through hole of the flange and a notch in the flange portion of the valve body so as to be fitted with the rotation shaft through hole. The structure of the rotation stop of the valve body is formed by a valve body having a flange having a substantially identical shape smaller than the rotation shaft through hole so that the rotation shaft through hole of the flange is formed in a non-circular shape. The shut-off valve according to 1. 2. The shut-off valve according to claim 1, wherein the valve body is provided with a rotation stop hole or protrusion other than the rotation shaft through-hole of the flange, and the protrusion or hole to be fitted to the flange is formed in the valve body.

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