JP2023082449A - Valve device and part exchange jig - Google Patents

Abstract

To provide a valve device which is easy in maintenance when a connection region between a valve body and a stem is worn, and a part exchange jig.SOLUTION: A valve device comprises: a valve body having a circulation path; a housing having two main passages which communicate with each other through the circulation path of the valve body in a valve body accommodation chamber; an annular seat member arranged in a position corresponding to one main passage in the housing; a first stem for rotating the valve body around an axial line; and a second stem which can make the valve body incline toward the seat member. The valve body has a first region and a second region which are arranged in positions with the circulation path sandwiched therebetween, and a valve main body part for connecting the first region and the second region and abutting on the seat member by the inclination of the valve body. The second region has a recess into which an end part of the second stem is inserted, and a second region main body fixed with the recess. The second region main body can attach and detach the recess to/from the circulation path side.SELECTED DRAWING: Figure 5

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device including a valve body and a housing accommodating the valve body so as to be rotatable around a predetermined axis, and a jig for replacing parts of the valve device.

2. Description of the Related Art Conventionally, there has been known a valve device for opening/closing or switching a channel through which an object to be circulated is circulated (see Patent Literature 1). As shown in FIG. 21, this valve device 600 includes a valve body 601 formed with a flow passage R11 passing through a virtual plane orthogonal or substantially orthogonal to an axis L extending in a predetermined direction; A housing 603 having a body accommodating chamber 602 and having two main passages R12 and R13 that can communicate with each other through a flow passage R11 of the valve body 601 in the valve member accommodating chamber 602; and an annular seat member 604 positioned at the .

Further, the valve device 600 is connected to one end of the valve body 601 in the direction of the axis L while being inserted through the housing 603 so as to pass through the axis L, and rotates the valve body 601 around the axis L. 605 is inserted through the housing 603 from the opposite side of the first stem 605 so as to pass through the axis L, and engages with the other end of the valve body 601 in the direction of the axis L, and the valve body 601 is attached to the seat member 604. a second stem 606 that can be tilted toward.

In this valve device 600, by rotating the first stem 605 around the axis L in a state in which the valve body 601 is not tilted toward the seat member 604, the valve body 601 rotates around the axis L without contacting the seat member 604. rotate to

By rotating the second stem 606 around the axis L in a state where the non-penetrating portion (valve body portion) 601a of the valve body 601 faces the main passage R12, the valve body 601 moves to one end (the first end) in the direction of the axis L. The portion connected to the stem 605 (the right end in FIG. 21) is tilted toward the seat member 604, whereby the valve body 601a is pressed against the seat member 604 to block the main passage R12.

According to the valve device 600 described above, since the valve body 601 does not come into contact with the seat member 604 when the valve body 601 is rotated, wear of the seat member 604 can be minimized. In comparison, the gap between the valve body 601 and the housing 603 can be properly sealed over a long period of time.

JP 2014-62625 A

In the valve device 600 described above, the valve body 601 has a concave portion 607 into which the second stem 606 can be inserted at the other end in the axis L direction. The inner peripheral surface of the concave portion 607 is a pressing surface that is pressed against the cam surface 608 of the second stem 606 when the second stem 606 rotates around the axis L with the valve body portion 601a facing the main passage R12. S10 is provided. When the second stem 606 rotates around the axis L with the valve body 601a facing the main passage R12, the cam surface 608 presses the pressing surface S10, thereby tilting the valve body 601. The valve body portion 601a is pressed against the seat member 604 .

At this time, the inner peripheral surface of the recessed portion 607 (the pressing surface S10, etc.) wears due to sliding against the cam surface 608 of the second stem 606, so that when the valve element 601 tilts, the contact between the valve element 601 and the seat member 604 is reduced. In order to ensure sufficient sealing performance between the valve devices 600, the recesses 607 must be replaced every predetermined number of operations or every predetermined period of time.

However, since the recess 607 must be removed from the valve body 601 so as to be moved toward the second stem 606 in the direction of the axis L with respect to the valve body 601, when replacing the recess 607 in the valve device 600 described above, the main After removing the pipes connected to the passages R12 and R13, the housing 603 is disassembled to remove the second stem 606 from the recess 607, and then the recess 607 must be removed from the valve body 601, which is very complicated. there were.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a valve device that is easy to maintain when the engagement portion between the valve disc and the stem for tilting the valve disc is worn, and a jig for replacing parts of the valve device. Make it an issue.

The valve device of the present invention is
a valve body rotatably arranged around a predetermined axis and having a flow path passing through a virtual plane orthogonal or substantially orthogonal to the axis;
a housing having a valve body housing chamber for housing the valve body, and having at least two main passages that are communicable with each other through the flow passages of the valve body in the valve body housing chamber;
an annular seat member arranged around an opening that opens toward the valve body accommodating chamber at a position corresponding to one of the at least two main passages in the housing;
a first stem that is inserted through the housing so as to pass through the axis and engages with a first portion, which is one end of the valve body in the axial direction, and rotates the valve body around the axis;
The housing is inserted through the housing from the opposite side of the first stem so as to pass through the axis and engages with a second portion, which is the other end of the valve body in the axial direction, and the valve body is connected to the seat member. a second stem that can be tilted toward
The valve body includes the first portion and the second portion disposed at a position across the flow passage between the first portion and the first portion in the axial direction, and the first portion and the second portion. and a valve body that abuts against the seat member by the tilting of the valve body,
The second part includes a recess having an inner surface defining a space into which the end of the second stem is inserted, and a second part body to which the recess is detachably fixed and connected to the valve body. and
The second part main body is configured such that the concave portion can be attached and detached from the flow passage side,
The second stem tilts the valve body by sliding the end portion against the inner surface of the recess.

According to such a configuration, maintenance is facilitated when the engagement portion between the valve body and the second stem for tilting the valve body is worn due to sliding of the second stem. That is, since the second portion main body is configured such that the concave portion can be attached and detached from the flow passage side as in the above configuration, the valve body can be inserted into the concave portion with respect to the second portion main body while the valve body is arranged in the valve body accommodating chamber. can be attached and detached, the recess can be replaced without disassembling the housing and taking out the valve body.

In the valve device,
The housing has an opening that allows communication between the outside of the housing and the flow path, and a lid that releasably closes the opening,
The opening may be larger than the recess.

According to such a configuration, by releasing the opening, the flow path can be accessed from the outside of the housing through the opening, which facilitates replacement of the recess.

Further, the jig for parts replacement of the present invention is
A part replacement jig used when replacing the recess in any one of the above valve devices arranged so that the axis intersects the vertical direction,
a base removably arranged below the valve body in the valve body chamber;
a support portion that extends upward from the base while the base is disposed in the valve body housing chamber and supports the valve body.

When the valve device is arranged so that the axis intersects the vertical direction, a load in the vertical direction (direction intersecting the axial direction) due to gravity is generated at the engaging portion between the second stem and the valve body. , the friction between the end of the second stem and the inner surface of the recess increases, making it difficult to attach and detach the recess from the second part main body, but the valve body is supported from below by the parts replacement jig. This eliminates or reduces the load, thereby facilitating attachment and detachment of the recess to and from the second part main body.

In the parts replacement jig,
The support portion may include a receiving portion that abuts against the valve body from below the valve body, and a space adjusting portion that can change the space between the receiving portion and the base portion.

According to this configuration, the interval between the receiving portion and the base portion can be changed by the interval adjusting portion. The load generated in the engaging portion of the body with the recess can be suppressed more favorably, thereby facilitating replacement of the recess.

Further, in the parts replacement jig,
The receiving portion has a first receiving portion that contacts the first portion of the valve body, and a second receiving portion that contacts the second portion of the valve body,
The spacing adjusting section includes a first spacing adjusting section capable of adjusting the spacing between the first receiving section and the base, and a second spacing adjusting section capable of adjusting the spacing between the second receiving section and the base. may have

According to this configuration, the distance between the base portion and the first portion and the second portion, which are spaced apart in the axial direction in the valve body, can be adjusted (changed) separately. The load generated at the engaging portion with the recess is more effectively suppressed, thereby facilitating replacement of the recess.

Further, in the parts replacement jig,
The base may partition the valve housing chamber into an upper region where the valve body is arranged and a lower region where the valve body is not arranged.

According to this configuration, since the valve body housing chamber is partitioned into the upper region and the lower region by the base, the lower region (base It is possible to prevent parts and the like from falling to the lower area).

As described above, according to the present invention, there is provided a valve device that is easy to maintain when the engagement portion between the valve body and the stem for tilting the valve body is worn, and a jig for replacing parts of the valve device. can do.

FIG. 1 is a longitudinal sectional view of the valve device according to the present embodiment, and is a longitudinal sectional view of a state in which the valve body portion of the valve body faces the first main passage. FIG. 2 is a vertical cross-sectional view of the valve device, and is a vertical cross-sectional view of a state in which the valve body portion of the valve body faces the opening. FIG. 3 is a partial cross-sectional view of the first main passage including the lateral cross-section of the housing, and is a partial cross-sectional view of a state in which the lid is attached to close the opening. FIG. 4 is a partial cross-sectional view of the first main passage including the lateral cross section of the housing, and is a partial cross-sectional view of a state in which the lid is removed to open the opening. FIG. 5 is a partially enlarged cross-sectional view of the valve body and its surroundings, and is a partially enlarged cross-sectional view of a state in which a second portion of the valve body is disassembled. FIG. 6 is an enlarged view of the VI position in FIG. FIG. 7 is an enlarged view of the pressing member viewed from the X-axis direction. FIG. 8 is an enlarged view of the second stem engaging portion viewed from the second stem side in the X-axis direction. FIG. 9 is an enlarged view of the second stem engaging portion viewed from the first main passage side in the Z-axis direction. FIG. 10 is an enlarged view of the second stem engaging portion viewed from the flow passage side in the X-axis direction. FIG. 11 is a front view of a component replacement jig. FIG. 12 is a plan view of the component replacement jig. FIG. 13 is a plan view of a base included in the component replacement jig. 14 is a cross-sectional view taken along line XIV-XIV in FIG. 13. FIG. FIG. 15 is an exploded perspective view of a support portion provided in the jig for component replacement, and is an exploded perspective view showing a cross-sectional shape of a part of the configuration. FIG. 16 is a diagram showing a state in which the base is arranged inside the valve body housing chamber. FIG. 17 is a diagram showing a state in which a support portion is attached to the base portion arranged in the valve body housing chamber. FIG. 18 is a diagram showing a state in which the part replacement jig arranged in the valve body accommodating chamber supports the valve body. FIG. 19 is a diagram showing a state in which a connecting member and a pressing member are removed from the valve body supported by the part replacement shaft arranged in the valve body housing chamber. FIG. 20 is a diagram showing a state in which the second stem engaging portion, the key plate, and the dust seal are removed from the valve body supported by the parts replacement shaft arranged in the valve body housing chamber. FIG. 21 is a longitudinal sectional view of a conventional valve device.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 20. FIG.

As shown in FIGS. 1 to 4, the valve device 1 of this embodiment includes a valve body 2 having a flow passage F, and the valve body 2 being rotatable about an axis L extending in a predetermined direction (horizontal direction in FIG. 1). and a housing 3 having therein a valve body accommodation chamber VR to be accommodated therein. The valve device 1 is a so-called two-way valve, and the housing 3 is formed with a first main passage R1 and a second main passage R2 that allow communication between the valve body chamber VR and the outside of the housing 3 . In the housing 3 of the present embodiment, the first main passage R1 and the second main passage R2 are arranged in a direction perpendicular to the axis L and separated from each other on both sides of the valve housing chamber VR (vertical direction in FIG. 1). extended. Further, the valve device 1 includes an annular seat member 4 arranged in the housing 3, and a first seat member 4 which is inserted through the housing 3 so as to pass through the axis L and which supports the valve body 2 within the valve body accommodation chamber VR. a stem 8 and a second stem 9; In the following description, the direction in which the axis L extends is defined as the X-axis direction, and the direction in which the first main passage R1 and the second main passage R2 extend is defined as the Z-axis direction. and the direction perpendicular to is the Y-axis direction.

The valve element 2 is arranged in the valve element accommodating chamber VR so as to be rotatable about the axis L and tiltable about one end in the X-axis direction (the direction in which the axis L extends) as a fulcrum. The valve body 2 rotates around the axis L to close the first main passage R1 in an open state (a state in which the valve housing chamber VR communicates with the outside), or closes the first main passage R1 in a closed state. Release the first main passage R1. The valve body 2 of this embodiment is tiltably supported by a first stem 8 at one end in the X-axis direction (the right end in FIG. 1) in the valve body chamber VR, and the other end in the X-axis direction is tiltable. (Left end in FIG. 1) is supported by the second stem 9 . The valve body 2 rotates around the axis L as the first stem 8 rotates.

Further, the valve body 2 has a flow passage F passing through a virtual plane orthogonal or substantially orthogonal to the axis L. As shown in FIG. The flow passage F communicates the first main passage R1 and the second main passage R2 when the valve body 2 is at a predetermined position (for example, the position shown in FIG. 2) around the axis L. The flow passage F of the present embodiment is formed (defined) so as to extend inside the valve body 2 in a direction perpendicular to the axis L and open at least at both ends of the valve body 2 in a direction perpendicular to the axis L. there is

Specifically, the valve body 2 is arranged at a first portion 21 forming one end portion of the valve body 2 in the X-axis direction, and at a position spaced apart from the first portion 21 in the X-axis direction. 2 and a second portion 22 that constitutes the other end in the X-axis direction of the second portion 21 and the first portion 21 and the second portion 22 are connected at a position spaced apart from the axis L and can close the first main passage R1. It has a valve body portion 23 and is rotatable around the axis L within the valve body housing chamber VR. As the valve body 2 rotates, the valve body 23 moves on a circular orbit about the axis L along the inner surface IS defining the valve body chamber VR in the housing 3 . When the valve body 2 is at a predetermined position around the axis L (that is, the position where the valve body 23 faces the first main passage R1), the valve body 23 is pressed against the seat member 4. This blocks the first main passage R1. Details are as follows.

The first portion 21 is a portion that has a first stem engaging portion 211 that engages with the first stem 8 and spreads in a direction orthogonal to the X-axis direction.

The first stem engaging portion 211 is a portion (concave surface) that is recessed toward the second portion 22 in the X-axis direction at a portion that intersects the axis L of the surface of the first portion 21 facing the inner surface IS of the housing 3 . , the end of the first stem 8 is inserted. An inner peripheral surface (a surface surrounding the axis L) 212 of the first stem engaging portion 211 is configured to transmit rotational torque about the axis L when the first stem 8 rotates about the axis L. there is

As also shown in FIG. 5, the second portion 22 has a second stem engaging portion (recess) 5 that engages with the second stem 9, and is spaced apart from the first portion 21 in the X-axis direction. , which extends in a direction orthogonal to the X-axis direction. A flow passage F is formed between the first portion 21 and the second portion 22 .

Specifically, the second portion 22 includes a second stem engaging portion (recess) 5 and a second portion body to which the second stem engaging portion 5 is detachably fixed and connected to the valve body portion 23. 220 and . The second part 22 includes a pressing member 6 that fixes the second stem engaging part 5 to the second part main body 220, and a plurality of connecting members that connect the second stem engaging part 5 and the pressing member 6. B, and a dust seal 7 that seals between the second stem engaging portion 5 and the second portion main body 220 . The second part 22 also has at least one key plate K that prevents relative rotation about the axis L between the second part body 220 and the second stem engaging portion 5 .

The second part main body 220 holds the second stem engaging portion 5 so as to surround the second stem engaging portion 5 when viewed in the X-axis direction. The second part main body 220 is configured so that the second stem engaging portion 5 can be attached and detached from the flow path F side. Specifically, the second part main body 220 spreads in a direction orthogonal to the X-axis direction, penetrates in the X-axis direction, and has a holding portion 221 in which the second stem engaging portion 5 is fitted at a position that intersects the axis L. have.

As also shown in FIG. 6, the holding portion 221 extends from the outside of the valve body 2 in the X-axis direction (the surface side facing the inner surface IS of the housing 3: hereinafter also referred to as "the outside in the X-axis direction"). A regulating portion 224, a seal arrangement portion 223, a holding portion main body 222, and a retainer are arranged in order toward the inner side of the valve body 2 in the axial direction (on the side of the flow passage F: hereinafter also referred to as “the inner side in the X-axis direction”). and a member arrangement portion 225 .

The holding portion main body 222 is a portion into which the second stem engaging portion 5 is inserted (fitted). The holding portion main body 222 has a cylindrical inner peripheral surface 222a that surrounds the axis L in the circumferential direction and extends in the X-axis direction. The inner diameter and X-axis direction dimensions of the holding portion main body 222 correspond to the outer diameter and X-axis direction dimensions of the second stem engaging portion 5 . The holding portion main body 222 of this embodiment has a plurality of key grooves 222k arranged at intervals in the circumferential direction on the inner peripheral surface 222a. Each of the plurality of key grooves 222k is recessed radially outward of the holder body 222 and extends outward in the X-axis direction from the inner end of the holder body 222 in the X-axis direction. The holding portion main body 222 of this embodiment has four key grooves 222k, and these four key grooves 222k are arranged at regular intervals in the circumferential direction.

The seal placement portion 223 is a portion where the dust seal 7 is placed, and is connected to the outer end portion of the holding portion main body 222 in the X-axis direction. The seal arrangement portion 223 is a portion that is concentric with the holding portion main body 222 and has a reduced diameter (small inner diameter).

The restriction portion 224 is a portion that restricts outward movement of the second stem engaging portion 5 in the X-axis direction, and is connected to the outside of the seal arrangement portion 223 in the X-axis direction. When the second stem engaging portion 5 is inserted into the holding portion main body 222 from the side of the flow passage F toward the outside in the X-axis direction, the restricting portion 224 prevents the second stem engaging portion 5 from blocking the dust seal 7 . Further outward movement of the second stem engaging portion 5 in the X-axis direction is prevented. Specifically, the restriction portion 224 is a portion that is concentric with the seal arrangement portion 223 and has a reduced diameter (small inner diameter).

The pressing member placement portion 225 is a portion where the pressing member 6 is placed, and is connected to the inner end portion of the holding portion main body 222 in the X-axis direction. The pressing member placement portion 225 is a portion that is concentric with the holding portion main body 222 and has an enlarged diameter (large inner diameter).

The dimension of the pressing member placement portion 225 in the X-axis direction is defined by the surface of the second part main body 220 facing the flow passage F side and the surface of the pressing member 6 facing the flow passage F side in the state where the pressing member 6 is arranged. and are set to be at the same position or substantially the same position in the X-axis direction. The pressing member placement portion 225 has a female thread 225a on its inner peripheral surface (surface surrounding the axis L).

The second stem engaging portion 5 has a concave surface (inner surface) 55 defining a space into which the end of the second stem 9 is inserted. The second stem engaging portion 5 is detachably fixed to the second portion main body 220 while being fitted in the holding portion 221 (more specifically, the holding portion main body 222). Specifically, as shown in FIGS. 7 to 9, the second stem engaging portion 5 includes a cylindrical engaging portion main body 50 and an engaging portion main body 50 that protrudes outward in the X-axis direction. It has a first convex portion 51 and a second convex portion 52 that protrudes inward in the X-axis direction from the engaging portion main body 50 .

The engaging portion main body 50 is a columnar portion centered on the axis L, and the outer diameter of the engaging portion main body 50 is the same as or slightly smaller than the inner diameter of the holding portion main body 222 . Further, the dimension of the engaging portion main body 50 in the X-axis direction is the same as the dimension of the holding portion main body 222 in the X-axis direction.

The engaging portion main body 50 has a plurality of key grooves 50k arranged at intervals in the circumferential direction on the peripheral surface 50a. In addition, the engaging portion main body 50 has a plurality of screw holes 50n extending outward in the X-axis direction on the peripheral portion of the surface 50b facing inward in the X-axis direction.

Each of the plurality of key grooves 50k extends outward in the X-axis direction from an inner end portion in the X-axis direction of the peripheral surface 50a, and faces the plurality of key grooves 222k of the holding portion main body 222 of the second portion main body 220. It is placed in a position where A hole extending in the X-axis direction is formed by the key groove 50k of the engaging portion main body 50 and the key groove 222k of the holding portion main body 222 facing each other.

50 n of several screw holes are arrange|positioned at intervals in the circumferential direction. 50 n of several screw holes of this embodiment are arrange|positioned at equal intervals in the circumferential direction in the state which surrounded the 2nd convex part 52. As shown in FIG.

The first convex portion 51 is a portion that fits into a region surrounded by the restricting portion 224 of the holding portion 221 . The first convex portion 51 of the present embodiment is a convex portion with a circular outline when viewed from the X-axis direction, and the outer diameter of the first convex portion 51 is the same as or slightly smaller than the inner diameter of the restricting portion 224 .

The second convex portion 52 is a portion that fits into the pressing member 6 . The second convex portion 52 of the present embodiment is a convex portion having a circular outline when viewed in the X-axis direction, and has a groove 521 extending in the circumferential direction on the peripheral surface.

In the second stem engaging portion 5 having the engaging portion main body 50, the first convex portion 51, and the second convex portion 52 as described above, the concave surface 55 extends from the surface 51a facing outward in the X-axis direction to the X Concave inward in the axial direction. The end of the second stem 9 is inserted into this concave surface 55 . The concave surface 55 of the second stem engaging portion 5 engages with the second stem 9 so that when the second stem 9 rotates about the axis L, a force is applied from the second stem 9 in a direction intersecting the axis L. ing.

Specifically, the concave surface 55 has an inner peripheral surface 551 surrounding the axis L and a bottom surface 552 orthogonal to the axis L. As shown in FIG.

The inner peripheral surface 551 is pressed against a portion 90 of the peripheral surface of the second stem 9 when the second stem 9 rotates around the axis L with the valve body 23 facing the first main passage R1. It includes a first pressing surface S1 and a second pressing surface S2.

Specifically, the inner peripheral surface 551 has a quadrangular shape with four arc-shaped protruding corners when viewed in the X-axis direction. In this inner peripheral surface 551, when the valve body portion 23 faces the first main passage R1, the first pressing surface S1 is a surface on the first main passage R1 side, and the second pressing surface S2 is a surface facing the first main passage R1. This is the surface on the side of the second main passage R2. Further, the bottom surface 552 has a cylindrical bottom projection 553 that spreads in a direction orthogonal to the X-axis direction and protrudes from a position that intersects the axis L. As shown in FIG. The bottom surface 552 is located on the second convex portion 52 side from the center of the engaging portion main body 50 (in the vicinity of the boundary position between the engaging portion main body 50 and the second convex portion 52 in the example of the present embodiment) in the X-axis direction. positioned.

The recessed surface 55 configured in this manner is arranged such that the midpoint C between the first pressing surface S1 and the second pressing surface S2 and the axis L are shifted from each other when viewed from the X-axis direction. Specifically, in the square inner peripheral surface 551 viewed from the X-axis direction, the surface forming the side near the axis L constitutes the first pressing surface S1, and the surface forming the side far from the axis L is the second pressing surface S1. A pressing surface S2 is configured.

As shown in FIG. 10, the pressing member 6 is a ring-shaped member, and straddles the engaging portion main body 50 and the pressing member placement portion 225 to extend the second portion main body 220 (specifically, the pressing member placement portion 225) and is connected to the engaging portion main body 50. As shown in FIG. The pressing member 6 of the present embodiment has a plate-like shape whose thickness direction is the X-axis direction.

The outer diameter of this pressing member 6 corresponds to the inner diameter of the pressing member placement portion 225 of the holding portion 221, and has a male screw 6a on the outer peripheral surface. The male thread 6 a is screwed into the female thread 225 a on the inner peripheral surface of the pressing member arrangement portion 225 . Also, the inner diameter of the pressing member 6 corresponds to the outer diameter of the second protrusion 52 of the second stem engaging portion 5 , and the second protrusion 52 fits into the region surrounded by the annular pressing member 6 .

The pressing member 6 also has a plurality of through holes 61 penetrating in the X-axis direction at positions corresponding to the respective screw holes 50n of the engaging portion main body 50 . That is, the plurality of through holes 61 are arranged at intervals in the circumferential direction (equally spaced in the example of the present embodiment).

The connecting member B is a member that connects the pressing member 6 to the second stem engaging portion 5 (specifically, the engaging portion main body 50), and the connecting member B in this embodiment is a screw. Each connecting member B is screwed into the screw hole 50n of the engaging portion main body 50 while being inserted through the through hole 61 of the pressing member 6 .

The dust seal 7 is a member that seals between the holding portion 221 of the second portion body 220 and the second stem engaging portion 5 . The dust seal 7 has an annular shape and is arranged between the seal arrangement portion 223 of the holding portion 221 and the engaging portion main body 50 and the first convex portion 51 of the second stem engaging portion 5 .

At least one key plate K is a thin plate member extending in the X-axis direction, and is inserted into a hole formed by the key groove 50k of the engaging portion main body 50 and the key groove 222k of the holding portion main body 222 facing each other. This prevents relative rotation about the axis L between the second part main body 220 and the second stem engaging portion 5 . The second part 22 of this embodiment has a plurality of key plates K. As shown in FIG.

The valve body portion 23 connects the first portion 21 and the second portion 22 at a position away from the axis L in a direction orthogonal to the axis L, and the valve body 2 is positioned at a predetermined position (shown in FIG. 1) around the axis L. position), it faces the first main passage R1. The valve body portion 23 of the present embodiment connects the corresponding (specifically, facing in the X-axis direction) ends of the first portion 21 and the second portion 22 . That is, in the valve body 2, the first portion 21, the second portion 22, and the valve body portion 23 are arranged in a U-shape (see FIG. 1). In the valve body 2 , the U-shaped inner space (that is, the area defined by the first portion 21 , the second portion 22 and the valve body portion 23 ) constitutes the flow path F.

The valve main body portion 23 is configured to be able to face a region including the first main passage R1 and its peripheral portion when facing the first main passage R1 side, and the peripheral portion of the first main passage R1 (seat member 4 ) and a seal member 231 is provided at a position facing the .

The housing 3 has at least two main passages R that can communicate with each other through the flow passages F of the valve body 2 . As described above, the valve device 1 according to this embodiment is a two-way valve, and the housing 3 has two main passages that can communicate with each other through the flow passage F of the valve body 2 housed in the valve body housing chamber VR. (first main passage R1 and second main passage R2). The housing 3 includes a housing main body 30 defining a valve housing chamber VR, an opening 31 communicating between the outside of the housing main body 30 and the valve housing chamber VR, and a lid 32 releasably closing the opening 31. , a first flow passage forming portion 33 defining the first main passage R1, and a second flow passage forming portion 34 defining the second main passage R2.

The housing 3 of this embodiment has, for example, a main frame 35 and a sub-frame 36 connected to the main frame 35 .

The main frame 35 includes a body portion 350 having an internal space capable of accommodating the valve body 2 and having an open end in the Z-axis direction, and a main flange connected to one end (open end) of the body portion 350 in the Z-axis direction. and a part 351 . In this body portion 350 , the internal space communicates with the outside through the opening, and constitutes at least a portion of the valve body chamber VR of the housing 3 .

The main frame 35 also includes a second flow path forming portion 34 extending in the Z-axis direction from the other end of the main body portion 350 in the Z-axis direction, and a first stem insertion portion arranged at one end of the main body portion 350 in the X-axis direction. and a second stem insertion portion 353 arranged at the other end of the body portion 350 in the X-axis direction. The main frame 35 of this embodiment has an opening 31 arranged in the main body 350 and a lid 32 releasably closing the opening 31 .

The main flange portion 351 is a portion to which the sub-frame 36 is connected, and extends from the open end of the main body portion 350 outward in a plane direction perpendicular to the Z-axis direction.

The second flow passage forming portion 34 has a cylindrical shape extending from the main body portion 350 to the other side in the Z-axis direction, and defines a second main passage R2. A second main passage R<b>2 defined by the second flow path forming portion 34 communicates with the internal space of the main body portion 350 . In addition, the second flow path forming portion 34 has a flange 34a extending radially from the tip. This flange 34a is used to connect the pipe P1 and the like when the valve device 1 is arranged.

The first stem insertion portion 352 is a portion of the housing 3 through which the first stem 8 is inserted, and the second stem insertion portion 353 is a portion of the housing 3 through which the second stem 9 is inserted. Each of the first stem insertion portion 352 and the second stem insertion portion 353 is provided with a packing P for liquid-tight or air-tight with the inserted stems 8 and 9 .

The opening 31 is a portion that communicates the internal space of the body portion 350 with the outside, and is perpendicular to the direction in which the second flow path forming portion 34 extends (the Z-axis direction) when viewed from the X-axis direction in the body portion 350. It is arranged so as to open in the direction (Y-axis direction). In addition, the position of the opening 31 in the body portion 350 in the X-axis direction is between the first portion 21 and the second portion 22 of the valve body 2 arranged in the internal space (valve body chamber VR) of the body portion 350. , that is, the position corresponding to the flow path F. The opening 31 of the present embodiment has a circular opening when viewed in the Y-axis direction, and has a flange portion 311 extending radially outward from the opening end. Also, this opening 31 is larger than the second stem engaging portion 5 . Therefore, the second stem engaging portion 5 can be taken in and out of the body portion 350 (valve housing chamber VR) through the opening portion 31 .

The lid portion 32 is a member that extends in a direction perpendicular to the Y-axis direction and seals the opening portion 31 in a liquid-tight or air-tight manner. The lid portion 32 of the present embodiment is detachably fixed to the flange portion 311 of the opening portion 31 by connecting members such as bolts and nuts.

The sub-frame 36 has a connecting flange portion 361 connected to the main flange portion 351 of the main frame 35 and a first flow path forming portion 33 extending from the connecting flange portion 361 . The sub-frame 36 also has a seat member placement portion 362 in which the seat member 4 is placed.

The connecting flange portion 361 is connected to the main flange portion 351 of the main frame 35 to close the internal space of the main body portion 350 , thereby defining the valve element accommodating chamber VR in cooperation with the main body portion 350 . That is, in the valve device 1 of the present embodiment, the body portion 350, the main flange portion 351, and the connecting flange portion 361 constitute the housing body 30 that defines the valve body chamber VR.

The first flow path forming portion 33 is a cylindrical portion extending from the connecting flange portion 361 to the other side in the Z-axis direction, and defines the first main passage R1. The first main passage R1 defined by the first flow passage forming portion 33 communicates with the internal space of the body portion 350 (valve housing chamber VR). The first flow path forming portion 33 has a flange 331 radially extending from the tip. This flange 331 is used to connect the pipe P1 and the like when the valve device 1 is arranged. The first flow passage forming portion 33 of the present embodiment is arranged such that its central axis and the central axis of the second flow passage forming portion 34 are positioned on the same straight line.

The seat member placement portion 362 is formed inside the sub-frame 36 around an opening corresponding to the first main passage R1. The seat member placement portion 362 is an annular recess concentric with the first main passage R1, and accommodates the seat member 4 and a biasing member S that biases the seat member 4 toward the valve body 2 side.

The seat member 4 is arranged in the seat member arrangement portion 362 so as to surround the opening corresponding to the first main passage R1 inside the housing body 30 (more specifically, inside the sub-frame 36). The seat member 4 of this embodiment has an annular shape when viewed from the Z-axis direction, and is arranged so as to be concentric with the first main passage R1.

Specifically, the seat member 4 includes a cylindrical tubular portion 40 extending in the Z-axis direction, a seat body 41 connected to the other end of the tubular portion 40 in the Z-axis direction and having a seat surface 42, have The seat member 4 is arranged in the seat member arrangement portion 362 with the seat surface 42 directed toward the valve housing chamber VR. At least the sheet surface 42 of the sheet member 4 is made of a non-deformable rigid material. The sheet member 4 of this embodiment is entirely made of metal, and the sheet surface 42 is a rigid metal surface. The seat surface 42 is an arcuate surface centered on the central axis of the first main passage R1.

The first stem 8 is an axial member extending in the X-axis direction. The first stem 8 has one end located outside the housing 3 and the other end located inside the housing 3 (specifically, inside the valve housing VR) along the axis L. It is inserted through the first stem insertion portion 352 of the housing main body 30 (main body portion 350). A handle or an actuator (not shown) is arranged or connected to one end of the first stem 8, and is rotated about the axis L by the operation of the handle or the actuation of the actuator. The other end of the first stem 8 supports the valve body 2 so as to be tiltable.

The first stem 8 has a torque transmission surface 80 on the peripheral surface of the other end, which spreads in a direction orthogonal to the X-axis direction and is capable of making surface contact with the inner peripheral surface 212 of the first stem engaging portion 211 of the valve body 2 . include. The other end of the first stem 8 engages with the valve body 2 by being inserted into the first stem engaging portion (concave surface) 211 of the valve body 2 arranged in the valve body chamber VR. ing. As the first stem 8 rotates about the axis L, the torque transmission surface 80 transmits rotational torque to the valve body 2, and the valve body 2 rotates about the axis L. The torque transmission surface 80 of the first stem 8 is formed so as to expand in the direction in which the first portion 21 extends from the valve main body portion 23 of the valve body 2, so that the valve body 2 tilts with the valve main body portion 23 leading. allow.

The second stem 9 is an axial member extending in the X-axis direction. The second stem 9 has one end located outside the housing 3 and the other end located inside the housing 3 (specifically, inside the valve housing VR) along the axis L. It is inserted through the second stem insertion portion 353 of the housing main body 30 (main body portion 350). A handle or an actuator (not shown) is arranged or connected to one end of the second stem 9, and is rotated about the axis L by the operation of the handle or the actuation of the actuator.

The second stem 9 also includes a cam surface 90 having a center of curvature at a position eccentric to the axis L on the peripheral surface of the other end. The other end of the second stem 9 is inserted into the second stem engaging portion 5 (specifically, the concave surface 55) of the valve body 2 arranged in the valve body housing chamber VR, thereby engaged with. Then, as the second stem 9 rotates around the axis L, the cam surface 90 presses the first pressing surface S1 included in the inner peripheral surface 551 of the second stem engaging portion 5, and the cam surface 90 The second pressing surface S2 included in the inner peripheral surface 551 of the second stem engaging portion 5 is pressed.

Next, operation of the valve device 1 will be described.

First, when an object to be circulated is circulated in the valve device 1 arranged between the pipes P1, the second stem 9 is rotated, and the cam surface 90 moves the valve body 2 (specifically, the second stem engaging portion 5). The second pressing surface S2 is pressed (see FIG. 1). In this state, the valve body 2 stands up along the axis L, and is in a non-contact state with the seat member 4 around the opening of the first main passage R1 inside the housing 3 . In this state, the first stem 8 is rotated to rotate the valve body 2 around the axis L, and the flow passage F of the valve body 2 connects the first main passage R1 and the second main passage R2. becomes (see FIG. 2). During the rotation about the axis L, the valve body 2 rotates without contacting the inner surface of the housing 3 . In this way, when the flow path F connects the first main path R1 and the second main path R2, the object to be circulated flows through the flow path F from the first main path R1 toward the second main path R2. Distribution becomes possible.

On the other hand, when the flow of the object to be flowed is cut off, the first stem 8 is reversely rotated, the valve body 2 is reversely rotated about the axis L, and the valve body 23 of the valve body 2 moves toward the first main passage R1. (See FIG. 1). During this reverse rotation about the axis L, the valve body 2 also rotates without contacting the inner surface of the housing 3 . Then, when the valve main body portion 23 is in a state facing the first main passage R1, the second stem 9 is rotated. Thereby, the cam surface 90 of the second stem 9 presses the first pressing surface S<b>1 of the valve body 2 . By pressing the first pressing surface S1, the valve body 2 tilts toward the first main passage R1 with the first stem 8 as a fulcrum, and the sealing member 231 of the valve main body 23 contacts the seat surface 42 of the seat member 4. The seal member 231 of the valve main body 23 is pressed and brought into close contact with the seat surface 42 . As a result, the first main passage R1 is blocked (sealed), and the distribution target material cannot be distributed toward the second main passage R2.

In the opening and closing operation of the valve device 1 as described above, the tilting of the valve body 2, that is, the inner peripheral surface 551 (specifically, the first pressing surface S1) of the second stem engaging portion 5 by the cam surface 90 of the second stem 9 and the second pressing surface S2), the first pressing surface S1 and the like wear due to repeated sliding around the axis L.

When this wear exceeds a predetermined amount, when the valve device 1 is closed, the cam surface 90 presses the first pressing surface S1 insufficiently, and the valve main body 23 cannot press the seat member 4 sufficiently. , thereby preventing the first main passage R1 from being sufficiently blocked. Therefore, when using the valve device 1, the second stem engaging portion 5 is replaced according to the wear.

11 to 19, the configuration of the component replacement jig used in the replacement work of the second stem engagement portion 5 will be described below, and then the replacement work of the second stem engagement portion 5 will be described. . The valve device 1 in which the replacement work of the second stem engaging portion 5 described below is performed is arranged in a posture in which the axis L is perpendicular to the vertical direction.

As shown in FIGS. 11 and 18, this part replacement jig (hereinafter simply referred to as "jig") 10 can be detachably arranged below the valve body 2 in the valve body chamber VR. A base portion 11 and a support portion 15 that extends upward from the base portion 11 and supports the valve body 2 while the base portion 11 is arranged in the valve body chamber VR.

As shown in FIGS. 12 to 14 and 16, the base portion 11 extends in a direction orthogonal to the Z-axis direction when placed in the valve housing chamber VR, and has a peripheral edge viewed from the Z-axis direction. It has a base body 12 having a shape that abuts on the inner surface of the housing body 30 that defines the valve body chamber VR, and a grip portion 13 arranged on the base body 12 .

The base body 12 is larger than the second main passage R2 when viewed from the Z-axis direction, and the contour of the base body 12 when viewed from the Z-axis direction has a shape corresponding to the inner surface of the housing body 30 at a position below the valve body 2. be. Specifically, the base main body 12 is a disk-shaped member, and is disposed in the valve body storage chamber VR so that the valve body storage chamber VR is separated from the upper region A1 where the valve body 2 is disposed and the valve body 2. 16). The base main body 12 includes a pair of concave portions 121 arranged on the peripheral edge of a surface 12a facing upward (toward the valve body 2) when the base main body 12 is arranged in the valve body chamber VR, and and a plurality of through-holes 122 arranged inside the recess 121 in the radial direction.

In the base main body 12 of the present embodiment, the thickness dimension (dimension in the Z-axis direction) of the peripheral portion is larger than the thickness dimension of the other portion (the portion on the center side), and a pair of recessed portions 121 are arranged in this peripheral portion. , and a plurality of through holes 122 are arranged in the central portion (see FIG. 14). Also, the size of the base body 12 ( diameter) is set (see FIG. 16).

A pair of recesses 121 are arranged at both ends of the base body 12 in a predetermined radial direction, and each recess 121 extends in a direction orthogonal to the predetermined radial direction.

Each of the plurality of through-holes 122 penetrates the base body 12 in the thickness direction, and is arranged at intervals in the extending direction of the recess 121 at positions inside the recesses 121 in the predetermined radial direction. Each through-hole 122 of the present embodiment is a screw hole having a female thread on its inner peripheral surface.

The grasping portion 13 is a portion grasped by an operator or the like when arranging the base portion 11 in the valve housing chamber VR, and is arranged so as to protrude from the surface 12 a of the base portion main body 12 . The grip part 13 of this embodiment is arranged in the central part of the base main body 12 .

The support portion 15 has a receiving portion 18 that contacts the valve body 2 from below, and a space adjusting portion 17 that can change the space between the receiving portion 18 and the base portion 11 . In the jig 10 of this embodiment, the support portion 15 includes a first support portion 15A and a second support portion 15B. The first support portion 15A and the second support portion 15B are arranged at a position corresponding to one recess 121 of the pair of recesses 121 in the base 11 and a position corresponding to the other recess 121 . Thereby, the first support portion 15A can support the first portion 21 of the valve body 2 from below, and the second support portion 15B can support the second portion 22 of the valve body 2 from below. The first support portion 15A and the second support portion 15B of this embodiment have the same configuration. Therefore, the first support portion 15A will be specifically described below.

The first support portion 15A supports a base portion 16 fixed to the base portion 11, a gap adjustment portion (first gap adjustment portion) 17 extending from the base portion 16 in the Z-axis direction, and a first portion 21 of the valve body 2. and a receiving portion (first receiving portion) 18 for receiving. The first support portion 15A also has a plurality of connecting members 19 for detachably connecting the base portion 16 to the base body 12 .

The base portion 16 is a member extending in the radial direction of the base body 12 , and includes a plurality of protrusions 161 protruding toward the base body 12 in the Z-axis direction and a plurality of base portions 16 arranged at positions corresponding to the through holes 122 of the base body 12 . and a through hole 162 . The base portion 16 also has a plurality of screw holes 163 recessed toward the base body 12 from a surface facing away from the side of the base body 12 in the Z-axis direction.

The protrusion 161 has a shape corresponding to the recess 121 and fits into the recess 121 . A plurality of (two in the example of this embodiment) screw holes 163 are arranged at intervals in a direction perpendicular to the predetermined radial direction.

The interval adjusting portion 17 includes a plate member 171, a plurality of stud bolts 172 extending from the base portion 16 in the Z-axis direction, a plurality of bearing members 173 arranged on the stud bolts 172 to support the receiving portion 18, and the stud bolts 172. 172 and a plurality of nuts 174a, 174b that threadably engage.

The plate-like member 171 is a rectangular plate-like member whose thickness direction is the Z-axis direction, and has a plurality of holes 1711 penetrating in the Z-axis direction at positions corresponding to the screw holes 163 of the base portion 16 .

Each of the plurality of stud bolts 172 is screwed into the screw hole 163 of the base portion 16 while being inserted through the hole 1711 of the plate member 171 . A nut 174 a is screwed to each stud bolt 172 so as to sandwich the plate member 171 between the stud bolt 172 and the base portion 16 . A nut 174b is screwed onto the stud bolt 172 from the nut 174a to the tip side (end side opposite to the base portion 16 side). This nut 174b is used for positioning the bearing member 173 in the Z-axis direction. The plurality of stud bolts 172 are arranged at intervals in a direction orthogonal to the predetermined radial direction.

Each of the plurality of bearing members 173 has a cylindrical portion 1731 through which the stud bolt 172 is inserted, and a collar portion 1732 extending radially outward of the cylindrical portion 1731 from the open end of the cylindrical portion 1731 . Each bearing member 173 is arranged so as to be adjacent to the nut 174b on the distal end side of the nut 174b screwed onto the distal end portion of the stud bolt 172 .

In the gap adjusting portion 17 configured as described above, by changing the position of the nut 174b on the tip end side of the stud bolt 172 in the Z-axis direction, the base body 12 and the flange portion 1732 of the bearing member 173 are adjusted in the Z-axis direction. You can adjust (change) the interval between

The receiving portion 18 is a portion that supports the valve body 2 by coming into contact with the valve body 2 (the first portion 21 in the first support portion 15A) from the lower side of the valve body 2 . Specifically, the receiving portion 18 is a rectangular plate-like member extending in a direction orthogonal to the predetermined radial direction, and has through holes 181 arranged at respective positions corresponding to the stud bolts 172 . Each inner diameter of the plurality of through holes 181 has a size corresponding to the outer diameter of the cylindrical portion 1731 of the bearing member 173 and is smaller than the outer diameter of the flange portion 1732 . As a result, the receiving portion 18 is arranged in a state in which the cylindrical portion 1731 of the bearing member 173 is inserted into the through hole 181 and the peripheral edge of the opening of the through hole 181 is placed on the flange portion 1732 (supported from below). be done.

The connecting member 19 of the present embodiment is a bolt that is inserted through the through hole 162 of the base portion 16 and screwed into the through hole 122 of the base portion main body 12 to connect the base portion 16 to the base portion main body 12 . .

The second support portion 15B has the same configuration as the first support portion 15A, as described above. That is, the second support portion 15B includes a base portion 16 fixed to the base portion 11, a gap adjustment portion (second gap adjustment portion) 17 extending from the base portion 16 in the Z-axis direction, and a second portion 22 of the valve body 2. and a plurality of connecting members 19 for connecting the base portion 16 to the base body 12 .

Next, the replacement work of the second stem engaging portion 5 using the jig 10 configured as described above will be described.

First, the lid portion 32 is removed from the opening portion 31 to release the opening portion 31 . At this time, if the valve body portion 23 of the valve body 2 does not face the first main passage R1, the first stem 8 is rotated around the axis L so that the valve body portion 23 is aligned with the first main passage R1. Rotate the valve body 2 so that it is in the opposite position (located on the upper side).

When the opening 31 is released, the base 11 of the jig 10 is carried into the valve housing chamber VR through the opening 31, and arranged in the lower part of the valve housing chamber VR so as to block the second main passage R2 ( See Figure 16). As a result, the base portion 11 partitions the valve body chamber VR into an upper region A1 and a lower region A2.

When the base portion 11 is arranged in the valve body chamber VR, the first support portion 15A and the second support portion 15B are attached to the base portion 11 (see FIG. 17). Specifically, the support portions 15A and 15B are positioned relative to the base body 12 by fitting the projections 161 of the base portion 16 of the support portions 15A and 15B into the recesses 121 of the base body 12 . After the support portions 15A and 15B are positioned in this manner, the connecting member 19 is screwed into the through hole (screw hole) 122 of the base body 12 through the through hole 162 of the base portion 16, and the threaded connection is By tightening the member 19, each of the support portions 15A and 15B is connected (fixed) to the base body 12. As shown in FIG.

At this time, the nut 174b that supports the bearing member 173 in each interval adjusting portion 17 is moved to a position where it abuts on the nut 174a for fixing the stud bolt 172 to the base portion 16 or a position close to it. Accordingly, when the first support portion 15A and the second support portion 15B are attached to the base main body 12, a gap is generated between the receiving portion 18 of each support portion 15A and 15B and the valve body 2.

Subsequently, each interval is adjusted until each receiving portion 18 abuts against the valve body 2 (first portion 21 or second portion 22) and the weight of the valve body 2 is not applied to the stems 8 and 9. The nut 174b of the portion 17 is rotated to move the receiving portion 18 upward (see FIG. 18).

When the stems 8 and 9 are no longer subject to the weight of the valve body 2, the second stem engaging portion 5 fixed to the valve body 2 (specifically, the second part main body 220) is removed from the flow passage F side. be

Specifically, a plurality of connecting members B that connect the second stem engaging portion 5 and the pressing member 6 are removed, and then screwed to the pressing member placement portion 225 of the second portion main body 220. By rotating the holding member 6 around the axis L, the holding member 6 is removed from the holding member placement portion 225 (see FIG. 19). When the pressing member 6 is removed, the key plates K, the second stem engaging portion 5, and the dust seal 7 are removed in order from the holding portion main body 222 and the seal arrangement portion 223 of the second portion main body 220 (Fig. 20 reference).

Parts (for example, the second stem engaging portion 5 and the dust seal 7) removed from the flow passage F side and requiring replacement are carried out of the housing 3 through the opening 31. Then, new parts (for example, , the second stem engaging portion 5 and the dust seal 7) are carried into the housing 3 (that is, the valve housing chamber VR) through the opening 31, and these new parts (for example, the second stem engaging portion 5 and the dust seal 7 ), the pressing member 6, each key plate K, and each connecting member B are attached to the second part main body 220 in the reverse order of removal.

When the new second stem engaging portion 5 is attached to the second portion main body 220 as described above, the receiving portion 18 is lowered by the interval adjusting portion 17 of each of the support portions 15A and 15B to be separated from the valve body 2. After that, the support portions 15A and 15B are removed from the base body 12, and the support portions 15A and 15B and the base portion 11 are carried out of the housing 3 through the opening 31. As shown in FIG. Then, when the lid portion 32 is attached to close the opening portion 31, the replacement work of the second stem engaging portion 5 is completed.

According to the valve device 1 described above, maintenance becomes easy when the engaging portion between the valve body 2 and the second stem 9 for tilting the valve body 2 is worn due to sliding of the second stem 9. . That is, like the valve device 1 of this embodiment, the second part main body 220 is configured so that the second stem engaging portion (recess) 5 can be attached and detached from the flow passage F side, so that the valve body 2 Since the second stem engaging portion 5 can be attached to and detached from the second portion main body 220 while it is arranged in the accommodation chamber VR, the second stem engaging portion 5 can be removed without disassembling the housing 3 and taking out the valve body 2 . The stem engaging portion 5 can be replaced.

Further, in the valve device 1 of the present embodiment, the housing 3 has an opening 31 that allows communication between the outside of the housing 3 and the flow path F, and a lid 32 that releasably closes the opening 31. and the opening 31 is larger than the second stem engaging portion 5 . Therefore, by releasing the opening 31, the flow path F can be accessed from the outside of the housing 3 through the opening 31, so that the replacement of the second stem engaging portion 5 becomes easier.

Further, the jig 10 of the present embodiment includes a base portion 11 that can be detachably disposed below the valve body 2 in the valve body chamber VR, and a base portion 11 that is disposed in the valve body chamber VR. and a support portion 15 extending upward from the base portion 11 and supporting the valve body 2 .

When the valve device 1 is arranged so that the axis L intersects the vertical direction, the engagement portion between the second stem 9 and the valve body 2 is forced by gravity in the vertical direction (the direction intersecting the axis L direction). Therefore, the friction between the end of the second stem 9 and the concave surface (inner surface) 55 of the second stem engaging portion 5 increases, and the second stem engaging portion to the second portion main body 220 5 becomes difficult to attach and detach. However, since the valve body 2 is supported from below by the jig 10 , the load is eliminated or suppressed, thereby facilitating attachment and detachment of the second stem engaging portion 5 to and from the second portion main body 220 .

In addition, in the jig 10 of the present embodiment, the support portion 15 includes the receiving portion 18 that contacts the valve body 2 from the lower side of the valve body 2, and the distance between the receiving portion 18 and the base portion 11 can be changed. and an adjustment unit 17 . As a result, the distance between the receiving portion 18 and the base portion 11 can be changed by the distance adjusting portion 17, so that when the valve body 2 is supported by the jig 10 in the valve body chamber VR, the end portion of the second stem 9 and the base portion 11 can be changed. The load (load caused by the weight of the valve body 2 itself) generated in the engagement portion of the second stem engagement portion 5 of the valve body 2 with the concave surface 55 can be suppressed more appropriately. As a result, replacement of the second stem engaging portion 5 becomes easier.

Moreover, in the jig 10 of the present embodiment, the receiving portion 18 includes a receiving portion (first receiving portion) that contacts the first portion 21 of the valve body 2 and a receiving portion that contacts the second portion 22 of the valve body 2. (second receiving portion), and the space adjusting portion 17 includes a space adjusting portion (first space adjusting portion) capable of adjusting the space between the first receiving portion and the base portion 11, and the second receiving portion and the base portion. 11 and a space adjuster (second space adjuster) capable of adjusting the space. That is, the jig 10 has a first support portion 15A and a second support portion 15B. As described above, in the jig 10 of the present embodiment, the first portion 21 and the second portion 22, which are arranged in the X-axis direction (axial direction) in the valve body 2, and the base portion 11 are separated from each other. Since it can be adjusted (changed), the load generated at the engaging portion between the end of the second stem 9 and the concave surface 55 of the second stem engaging portion (recess) 5 of the valve body 2 (the load caused by the weight of the valve body 2 ) can be suppressed more effectively, thereby facilitating the replacement of the second stem engaging portion 5 .

In addition, in the jig 10 of the present embodiment, the base 11 is arranged in the valve housing chamber VR, and the valve housing chamber VR is divided between the upper region A1 where the valve body 2 is arranged and the valve body 2. It is divided into a lower area A2 which is not arranged. That is, the base portion 11 blocks the second main passage R2 located below the valve body 2 . In this way, when the jig 10 is arranged in the valve body chamber VR, the base portion 11 divides the valve body chamber VR into the upper region A1 and the lower region A2. When attaching and detaching the second stem engaging portion 5 to and from 220, the lower area A2 (the area below the base portion 11: in the example of the present embodiment, inside the second main passage R2) in the valve housing chamber VR. It is possible to prevent the falling of parts etc.

It should be noted that the valve device and the parts replacement jig of the present invention are not limited to the above-described embodiments, and of course various modifications can be made without departing from the gist of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, and part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, some of the configurations of certain embodiments can be deleted.

In the valve device 1 of the above-described embodiment, parts are carried in and out of the valve body housing chamber VR through the opening 31, and parts such as the second stem engaging portion 5 of the valve body 2 are removed and attached. is not limited to this configuration. For example, in the valve device 1, components (the second stem engaging portion 5, etc.) are inserted into the valve housing chamber VR through the main passage R (the first main passage R1 and the second main passage R2 in the example of the above embodiment). ), and removal and attachment of parts such as the second stem engaging portion 5 in the valve body 2 may be performed. That is, the housing 3 does not have to have the opening 31 . With such a configuration as well, the second stem engaging portion 5 and the like can be replaced without disassembling the housing 3 .

In addition, in the valve device 1 of the above-described embodiment, the holding portion (penetrating portion) 221 of the second portion main body 220 surrounds the second stem engaging portion 5 (that is, surrounds around the axis L). Although the engaging portion 5 is held, it is not limited to this configuration. The second part main body 220 does not have to surround the second stem engaging portion 5 . That is, the specific configuration of the holding portion 221 is not limited as long as the second stem engaging portion 5 can be attached and detached from the flow passage F side of the valve body 2 .

Moreover, although the valve device 1 of the above embodiment is a two-way valve, it may be a three-way valve or the like. That is, the valve device 1 may have two or more main passages R that communicate with the valve housing chamber VR.

In addition, in the valve device 1 of the above-described embodiment, the concave surface 55 that engages only the second portion 22 of the valve body 2 with the second stem 9 can be attached and detached from the flow passage F side, but the configuration is not limited to this. In addition to the second portion 22, the valve body 2 has a configuration in which the first portion 21 includes a concave surface (first stem engaging portion) 211 that engages with the first stem 8 and can be attached and detached from the flow passage F side. good too. In this case, the first portion 21 may have the same configuration as the second portion 22, or may have a configuration different from that of the second portion 22 so that the portion including the concave surface 211 can be attached and detached from the flow path F side.

In addition, the component replacement jig 10 of the above embodiment has two support portions 15A and 15B that support the valve body 2, but the configuration is not limited to this. The component replacement jig 10 may have a support portion 15B that supports at least the second portion 22 (the portion to which the portion 5 including the concave surface 55 is attached so as to be replaceable from the flow path F side). Also, the component replacement jig 10 may have three or more support portions 15A, 15B, . . .

In the component replacement jig 10 of the above-described embodiment, the adjustment of the Z-axis direction spacing between the base portion 11 and the receiving portion 18 is performed by moving up and down the nut 174b screwed onto the stud bolt 172. Not limited to configuration. For example, the space adjusting portion 17 may be configured to adjust the space between the base portion 11 and the receiving portion 18 in the Z-axis direction using hydraulic pressure or the like. That is, the space adjusting portion 17 is not limited to a specific configuration as long as it supports the valve body 2 by adjusting the space between the base portion 11 and the receiving portion 18 .

In addition, in the component replacement jig 10 of the above embodiment, the receiving portion 18 supports the valve body 2 by coming into contact with the valve body 2 from below, but is not limited to this configuration. The receiving portion 18 may be configured to be connected to the valve body 2 by a connecting member, clamped, fitted, or otherwise fixed.

Reference Signs List 1 valve device 2 valve body 21 first portion 211 first stem engaging portion (concave surface) 212 inner circumferential surface 22 second portion 220 second portion main body 221 holding Parts 222... Holding part main body 222a... Inner peripheral surface 222k... Key groove 223... Seal placement part 224... Regulating part 225... Pressing member placement part 225a... Female screw 23... Valve body part 231... Sealing member 3 Housing 30 Housing body 31 Opening 311 Flange 32 Lid 33 First flow passage forming portion 331 Flange 34 Second flow passage forming portion 34a Flange 35 Main frame 350 Main body 351 Main flange 352 First stem insertion part 353 Second stem insertion part 36 Sub frame 361 Connecting flange 362 Seat member Arrangement portion 4 Seat member 40 Cylindrical portion 41 Seat body 42 Seat surface 5 Second stem engaging portion (recess) 50 Engaging portion main body 50a Peripheral surface 50b X Surface facing inward in the axial direction 50k Key groove 50n Screw hole 51 First convex portion 51a Surface facing outward in the X-axis direction 52 Second convex portion 521 Groove 55 Concave surface (inner surface) 551 Inner peripheral surface 552 Bottom surface 553 Bottom convex portion 6 Pressing member 6a Male screw 61 Through hole 7 Dust seal 8 First stem 80 Torque Transmission surface 9 Second stem 90 Cam surface 10 Parts replacement jig 11 Base 12 Base main body 12a Surface 121 Concave portion 122 Through hole 13 Grasping portion 15 ... support portion 15A ... first support portion 15B ... second support portion 16 ... base portion 161 ... convex portion 162 ... through hole 163 ... screw hole 17 ... interval adjustment portion (first interval adjustment portion, 171... Hole, 172... Stud bolt, 173... Bearing member, 1731... Cylindrical part, 1732... Collar part, 174a, 174b... Nut, 18... Receiving part (first Receiving portion, second receiving portion) 181 Through hole 19 Connecting member 600 Valve device 601 Valve body 601a Valve main body 602 Valve body chamber 603 Housing 604 Seat member , 605... First stem, 606... Second stem, 607... Concave part, 608... Cam surface, A1... Upper area, A2... Lower area, B... Connecting member, F... Flow path, IS... Inner surface of housing, K Key plate L... Axis line P... Packing P1... Piping R,... Main passage R1... First main passage R2... Second main passage R11... Flow passage R12, R13... Main passage S... Biasing member, S1... first pressing surface, S2... second pressing surface, S10... pressing surface, VR... valve housing chamber

Claims (6)

a valve body rotatably arranged around a predetermined axis and having a flow path passing through a virtual plane orthogonal or substantially orthogonal to the axis;
a housing having a valve body housing chamber for housing the valve body, and having at least two main passages that are communicable with each other through the flow passages of the valve body in the valve body housing chamber;
an annular seat member arranged around an opening that opens toward the valve body accommodating chamber at a position corresponding to one of the at least two main passages in the housing;
a first stem that is inserted through the housing so as to pass through the axis and engages with a first portion, which is one end of the valve body in the axial direction, and rotates the valve body around the axis;
The housing is inserted through the housing from the opposite side of the first stem so as to pass through the axis and engages with a second portion, which is the other end of the valve body in the axial direction, and the valve body is connected to the seat member. a second stem that can be tilted toward
The valve body includes the first portion and the second portion disposed at a position across the flow passage between the first portion and the first portion in the axial direction, and the first portion and the second portion. and a valve body that abuts against the seat member by the tilting of the valve body,
The second part includes a recess having an inner surface defining a space into which the end of the second stem is inserted, and a second part body to which the recess is detachably fixed and connected to the valve body. and
The second part main body is configured such that the concave portion can be attached and detached from the flow passage side,
The valve device, wherein the second stem tilts the valve body by sliding the end portion against the inner surface of the recess. The housing has an opening that allows communication between the outside of the housing and the flow path, and a lid that releasably closes the opening,
2. The valve device of claim 1, wherein said opening is larger than said recess. A part replacement jig used when replacing the recess in the valve device according to claim 1 or 2, wherein the axis is arranged to intersect the vertical direction,
a base removably arranged below the valve body in the valve body chamber;
and a support part that extends upward from the base part and supports the valve body while the base part is arranged in the valve body housing chamber. 4. The component according to claim 3, wherein the support portion has a receiving portion that abuts against the valve body from below the valve body, and a space adjusting portion that can change the space between the receiving portion and the base portion. replacement jig. The receiving portion has a first receiving portion that contacts the first portion of the valve body, and a second receiving portion that contacts the second portion of the valve body,
The spacing adjusting section includes a first spacing adjusting section capable of adjusting the spacing between the first receiving section and the base, and a second spacing adjusting section capable of adjusting the spacing between the second receiving section and the base. The jig for parts replacement according to claim 4, having 4. The base partitions the valve housing chamber into an upper region where the valve body is arranged and a lower region where the valve body is not arranged while being arranged in the valve housing chamber. 6. A jig for parts replacement according to any one of 1 to 5.

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