Valve and valve assembly method

Abstract

The present invention provides a valve and a method for assembling the valve capable of suppressing the occurrence of misalignment of the thrust ring during assembly. The valve comprises a body having a receiving recess, an inner member disposed within the receiving recess, a fixing ring that presses the inner member toward the bottom surface, and a thrust ring interposed between the inner member and the fixing ring. An annular upper surface on which the thrust ring is disposed is formed on the upper surface of the inner member. The fixing ring has a ring recess formed on its lower surface that is concave toward the upper side and into which the thrust ring is inserted. The ring recess has an annular upper surface of the recess that is perpendicular to the axial direction of the fixing ring and abuts the upper surface of the thrust ring, and an inner surface of the recess that extends along the circumferential direction of the fixing ring and covers the outer circumference of the thrust ring. A ring projection is provided on the inner surface of the recess, and the outer circumference of the thrust ring is located above the ring projection in the axial direction.

Description

Technology Field

[0001] The present disclosure relates to a valve and a method of assembling the valve. Background Technology

[0002] In the valve of Patent Document 1, an orifice plate is placed on the body, and a seat valve body, an inner disc, a diaphragm, etc. are placed on the orifice plate, and the bonnet is screw-coupled to the body, thereby fixing the components such as the orifice plate to the body. Prior art literature

[0003] Japanese Patent Publication No. 4137267 The problem to be solved

[0004] In the valve of Patent Document 1, if the screw connection to the body of the bonnet is loosened, all components become loose. To prevent this, a valve is conceived in which an inner member having a flow path is placed in a receiving recess where an orifice plate of the body is placed, a thrust ring is placed on top of the inner member, and a fixing ring is screw-coupled to a threaded portion formed on the inner circumference of the receiving recess, thereby pressing the inner member toward the bottom surface of the receiving recess through the thrust ring. The thrust ring suppresses the accompanying rotation of the inner member caused by the rotation of the fixing ring. A diaphragm is placed in the inner member and is fixed to the inner member through a pressing adapter by screw-coupled the bonnet to the body.

[0005] In the assembly of the valve of the above configuration, when the thrust ring is placed on the inner member, since the inner member is not provided with a means for positioning or a fixing structure for the thrust ring, misalignment may occur due to vibration, etc., and it is necessary to correct the misalignment each time, which may be laborious.

[0006] Therefore, one objective of the present disclosure is to provide a valve and a method for assembling the valve that can suppress the occurrence of misalignment of the thrust ring during assembly. means of solving the problem

[0007] To solve the above objective, a valve of one embodiment of the present disclosure comprises: a body having a receiving recess in which a first flow path is formed and is open on the upper surface and the first flow path is open on the lower surface; an inner member disposed within the receiving recess and having a second flow path formed in communication with the first flow path; a fixing ring located on the upper side of the inner member and screw-coupled to a threaded portion formed on the inner circumference of the receiving recess to press the inner member toward the lower surface; and a thrust ring interposed between the inner member and the fixing ring to suppress the accompanying rotation of the inner member caused by the rotation of the fixing ring. On the upper surface of the inner member, the second fluid path is opened, and an annular upper surface is formed around it. The thrust ring is disposed on the annular upper surface. The fixing ring has an annular shape, and on its lower surface, a ring recess is formed that is concave upward and into which the thrust ring is inserted. The ring recess has an annular upper surface of the recess that is perpendicular to the axial direction of the fixing ring and abuts the upper surface of the thrust ring, and an inner surface of the recess that extends along the circumferential direction of the fixing ring and covers the outer circumference of the thrust ring. A ring projection is provided on the inner surface of the recess, and the outer circumference of the thrust ring is located above the ring projection in the axial direction.

[0008] In the above axial direction, the length from the lowest surface of the thrust ring to the lower surface of the fixed ring may be configured to fall within a predetermined length range.

[0009] A method for assembling a valve, which is one aspect of the present disclosure, comprises: a body having a receiving recess in which a first flow path is formed and is open on an upper surface and the first flow path is open on a lower surface; an inner member disposed within the receiving recess and having a second flow path formed in communication with the first flow path; a fixing ring located on the upper side of the inner member and screw-coupled to a threaded portion formed on the inner circumference of the receiving recess to press the inner member toward the lower surface; and a thrust ring interposed between the inner member and the fixing ring to suppress the accompanying rotation of the inner member caused by the rotation of the fixing ring, wherein the second flow path is opened on the upper surface of the inner member and an annular upper surface is formed around it, the thrust ring is disposed on the annular upper surface, the fixing ring has an annular shape, and a ring recess is formed on its lower surface that is concave toward the upper side and into which the thrust ring is inserted, and the ring recess is perpendicular to the axial direction of the fixing ring and A method of assembling a valve having an upper surface of a ring-shaped concave portion that contacts the upper surface of a thrust ring, and an inner surface of a concave portion that extends along the circumferential direction of the fixed ring and covers the outer circumference of the thrust ring, wherein a ring projection is provided on the inner surface of the concave portion and the outer circumference of the thrust ring is located above the ring projection in the axial direction, wherein the inner member is placed in the receiving concave portion of the body, the thrust ring is inserted between the ring projection of the ring concave portion of the fixed ring and the upper surface of the concave portion, and the fixing ring is screw-coupled to a threaded portion formed on the inner surface of the receiving concave portion so as to cover the inner member from the upper side with the lower surface of the fixed ring facing downward, thereby pressing the inner member toward the bottom surface through the thrust ring to fix the inner member to the body.

[0010] With the thrust ring positioned to be in contact with the upper surface of the concave portion of the ring, it may be measured whether the length from the lowest surface of the thrust ring to the lower surface of the fixed ring is within a predetermined length range. Effects of the invention

[0011] According to the present invention, a valve and a method for assembling the valve can be provided that suppress the occurrence of misalignment of the thrust ring during assembly. Brief explanation of the drawing

[0012] FIG. 1 is a cross-sectional view of a valve relating to one embodiment of the present disclosure. FIG. 2 is an enlarged cross-sectional view of the main part of the valve (1) of FIG. 1. Figure 3 is a perspective view of an orifice plate. Figure 4 (a) is a perspective view of the inner member, and (b) is a cross-sectional view of the inner member. Figure 5 (a) is a perspective view of the fixed ring, and (b) is a cross-sectional view of the fixed ring. Figure 6 is a plan view of a thrust ring. Figure 7 is an explanatory diagram of the process of inserting a thrust ring into the ring recess of a fixed ring. Figure 8 is an explanatory diagram of the process of fixing a fixed ring to a body. FIG. 9 is a cross-sectional view of a fixed ring regarding a deformation example. Specific details for implementing the invention

[0013] A valve and a method for assembling the valve according to one embodiment of the present disclosure will be described with reference to the drawings.

[0014] FIG. 1 is a cross-sectional view of a valve (1) in a closed state according to the present embodiment. FIG. 2 is an enlarged cross-sectional view of the main part of the valve (1) of FIG. 1. The valve (1) according to the present embodiment is an orifice-embedded diaphragm valve.

[0015] The valve (1) is, for example, a diaphragm valve and is equipped with a body part (2) and an actuator (3). In addition, in the following description, the actuator (3) side of the valve (1) is described as the upper side and the body part (2) side of the valve (1) is described as the lower side.

[0016] The body part (2) comprises a body (10), a gasket (15), an orifice plate (20), an inner member (30), a valve seat (40), a fixing ring (50), a thrust ring (60), a diaphragm (70), and a pressing adapter (80).

[0017] The body (10) is formed in a block shape using a metal material such as stainless steel. The body (10) has a first inlet passage (11) and a first outlet passage (12) formed therein, and is provided with a receiving recess (13) having a circular cross-section opening on the upper surface of the body (10). The first inlet passage (11) and the first outlet passage (12) correspond to a first flow path. In addition, the gasket (15), orifice plate (20), inner member (30), valve seat (40), fixing ring (50), thrust ring (60), diaphragm (70), and pressing adapter (80) constitute valve elements in this embodiment.

[0018] On the bottom surface of the receiving concave portion (13), a first outflow passage (12) is opened in the center, and around it, an annular plate support surface (13a), a tubular portion (13b), an annular concave portion (13c), and a contact surface (13d) are formed in a concentric shape in this order. The plate support surface (13a) has a flat shape. The tubular portion (13b) is provided to protrude upward. On the bottom surface (13f) of the annular concave portion (13c), a first inflow passage (11) is opened, and an annular first projection (13g) is provided. The first projection (13g) is located on the outside of the opening. The contact surface (13d) has a flat shape and is a surface that contacts the contact surface (30c) of the inner member (30) described later. A female screw portion (13h) is formed on the inner surface of the upper portion of the receiving concave portion (13). The surfaces constituting the plate support surface (13a), the tubular portion (13b), the annular concave portion (13c), and the contact surface (13d) correspond to the bottom surface of the receiving concave portion (13).

[0019] The gasket (15) is an annular member made of a soft material, and in this embodiment, it is made of a metal such as annealed stainless steel. That is, the gasket (15) is made of a metal that is more flexible than the body (10) and the inner member (30). The gasket (15) is placed in an annular concave portion (13c) and has a through hole (15a) that communicates with the first inlet passage (11). Since the gasket (15) is made of a soft material, when the valve element is fixed to the body (10), the first protrusion (13g) is formed to penetrate the lower surface (15b) of the gasket (15) to seal the connection between the first inlet passage (11) and the through hole (15a).

[0020] FIG. 3 is a perspective view of an orifice plate (20). As shown in FIG. 2 and 3, the orifice plate (20) is placed on the body (10) and has an orifice (20a) formed therein that communicates with the first outflow path (12). The orifice plate (20) is a thin disc made of metal, such as stainless steel, and has an orifice (20a) formed in its center. The orifice plate (20) is placed on the plate support surface (13a) of the receiving concave portion (13) and is fixed by being clamped between the plate support surface (13a) and the pressure surface (30a) of the inner member (30). The orifice plate (20) is configured to narrow the opening of the second outflow path (32) of the inner member (30). Additionally, although only one orifice (20a) is formed in the orifice plate (20), multiple orifices may be formed.

[0021] FIGS. 4(a) and 4(b) are a perspective view and a cross-sectional view of an inner member (30). As shown in FIGS. 2 and 4, the inner member (30) is placed within a receiving recess (13) and is positioned on a gasket (15) and an orifice plate (20). Four second inlet passages (31) and one second outlet passage (32) are formed in the inner member (30). Each second inlet passage (31) is connected to a first inlet passage (11) through a through hole (15a). The second outlet passage (32) is connected to a first outlet passage (12) through an orifice (20a). The second inlet passages (31) and the second outlet passage (32) correspond to second flow paths. The inner member (30) is made of a metal such as stainless steel having the same hardness as the body (10) and has a roughly stepped cylindrical shape having a large diameter portion (33) on the outer side and a small diameter portion (34) located inside the large diameter portion (33) with its upper end protruding upward. The outer surface of the large diameter portion (33) is fitted into the inner surface of the lower part of the receiving concave portion (13) of the body (10), thereby positioning the inner member (30) itself relative to the body (10).

[0022] The second outflow passage (32) penetrates the central part of the inner member (30). On the lower surface of the inner member (30), the second outflow passage (32) is opened in the central part, and around it, an annular pressure surface (30a), an annular concave part (30b), and a contact surface (30c) are formed in a concentric shape in this order. The pressure surface (30a) has a flat shape, and an annular pressure projection (30d) is provided on its outer side. On the bottom surface (30e) of the annular concave part (30b), the second inflow passage (31) is opened, and an annular second projection (30f) is provided to surround the opening. The second projection (30f) faces the first projection (13g) in the vertical direction along its entire circumference. Due to the annular concave portion (30b), the central portion of the bottom part of the inner member (30) forms a protrusion (30g) that protrudes downward. A pressure surface (30a) and a pressure projection (30d) are formed on the protrusion (30g). When the valve element is fixed to the body (10), the protrusion (30g) is inserted into the tubular portion (13b). The surface constituting the pressure surface (30a), the annular concave portion (30b), and the contact surface (30c) corresponds to the lower surface of the inner member (30).

[0023] The contact surface (30c) has a flat shape and contacts the contact surface (13d) of the body (10) when the valve element is fixed to the body (10). The pressure projection (30d) is configured to press the upper surface (20b) of the orifice plate (20) to seal the connection between the second outflow path (32) and the first outflow path (12). The second projection (30f) is configured to penetrate the upper surface (15c) of the gasket (15) to seal the connection between the second inflow path (31) and the through hole (15a). Before pressing the orifice plate (20), the outer edge of the pressure projection (30d) has an arc shape when viewed in cross-section. The pressure projection (30d) is deformed when pressing the orifice plate (20) and bending its outer circumference (20c).

[0024] On the upper surface side of the inner member (30), a second outlet passage (32) is opened in the center, and around it, a circular sheet arrangement groove (30h), an annular outlet groove (30i), a diaphragm support portion (30j), and an annular upper surface (30k) are formed in a concentric shape in this order. Four second inflow passages (31) are formed at equal intervals in the circumferential direction on the circumference. Each second inflow passage (31) has its lower end opened into an annular concave portion (30b) and its upper end opened into an annular outlet groove (30i). The number of second inflow passages (31) can be one or more. Each second inflow passage (31) is inclined inward as it faces upward. The lower end of each second inlet passage (31) is connected to the first inlet passage (11) of the body (10) through the through hole (15a) of the gasket (15).

[0025] The valve seat (40) is a toroidal member provided around the opening of the second outlet (32) on the upper surface of the inner member (30). The valve seat (40) is, for example, made of fluoropolymer (PTFE). The valve seat (40) is fitted into the seat placement groove (30h) of the inner member (30).

[0026] FIG. 5(a) and FIG. 5(b) are a perspective view and a cross-sectional view of a fixed ring (50). As shown in FIG. 2 and FIG. 5, the fixed ring (50) is made of a metal such as stainless steel and has a roughly toroidal shape. A male screw thread (50a) is formed on the outer surface of the fixed ring (50), and a double hex structure that engages with a rotary tool is formed on the inner surface (50b). On the lower surface (50c) of the fixed ring (50), a ring recess (50d) that is concave toward the upper side is formed. Two thrust rings (60) are accommodated in the ring recess (50d) (see FIG. 7).

[0027] The ring recess (50d) has an upper surface (50e) of the recess that forms a circular shape and is orthogonal to the axial direction of the fixed ring (50), and an inner surface (50f) of the recess that extends along the circumferential direction of the fixed ring (50) and is parallel to the axial direction of the fixed ring (50). The upper surface (50e) of the recess comes into contact with the upper surface (60a) of the thrust ring (60) located on the upper side (see FIG. 2). The inner surface (50f) of the recess covers the outer circumference of the thrust ring (60) (see FIG. 2 and 8). A ring projection (50g) that protrudes inward is provided on the inner surface (50f) of the recess. The ring protrusion (50g) is composed of an inclined surface (50g1) that extends obliquely upward from the lower side toward the center of the fixed ring (50), an upper and lower surface (50g2) that extends in the up and down direction, and a flat surface (50g3) that extends in a direction perpendicular to the up and down direction.

[0028] FIG. 6 is a plan view of a thrust ring (60). The thrust ring (60) is a member formed by coating a sliding material onto a stainless steel plate that forms a roughly washer shape. By the thrust ring (60), friction during rotation for fastening with a fixing ring (50) when fixing a valve element to the body (10) is reduced, thereby preventing the inner member (30) from rotating together. The thrust ring (60) is not limited to a member formed by coating a sliding material onto a stainless steel plate, and can be anything that can reduce friction during rotation of the fixing ring (50). The thrust ring (60) may, for example, be composed of a synthetic resin material with excellent sliding mobility, or it may be a thrust bearing. As shown in FIG. 2, two thrust rings (60) are placed on the annular upper surface (30k) of the inner member (30) while inserted into the ring recess (50d) of the fixed ring (50).

[0029] FIG. 7 is an explanatory diagram of the process of inserting two thrust rings (60) into the ring recess (50d) of a fixed ring (50). As shown in FIG. 7 (a), with the fixed ring (50) in an upside-down state, two thrust rings (60) are inserted into the ring recess (50d). The outer diameter of the thrust ring (60) is larger than the inner diameter of the ring protrusion (50g) portion of the inner circumference (50f) of the recess, but as the thrust ring (60) undergoes elastic deformation, the thrust ring (60) is inserted between the flat surface (50g3) of the ring protrusion (50g) and the upper surface (50e) of the recess. The thrust ring (60) can be easily inserted into the ring recess (50d) by following the inclined surface (50g1) of the ring protrusion (50g). As shown in FIG. 7(b), two thrust rings (60) are placed on the upper surface (50e) of the concave portion. In this state, the length (L) from the lower surface (60b) of the lower thrust ring (60) to the lower surface (50c) of the fixing ring (50) in the axial direction of the fixing ring (50) is configured to fall within a predetermined length range.

[0030] As shown in FIG. 2, the diaphragm (70) is a member positioned on the inner member (30) to be spaced apart from or in contact with the valve seat (40), thereby communicating or blocking the second inlet passage (31) and the second outlet passage (32). The diaphragm (70) is formed by bulging upward the central portion of a laminated metal sheet, such as special stainless steel, and a nickel-cobalt alloy sheet. The diaphragm (70) is supported by the diaphragm support portion (30j) of the inner member (30) and is fixed by being pressed by the lower portion (4a) of the bonnet (4) of the actuator (3) through a ring-shaped pressing adapter (80). The diaphragm (70) defines a portion of the flow path and is elastically deformed by being pressed by the diaphragm pressing part (6), so that when it comes into contact with the valve seat (40), the flow path is closed, and when it is separated from the valve seat (40), the flow path is opened.

[0031] As shown in FIG. 1, the actuator (3) comprises a bonnet (4), an actuator cap (5), a diaphragm pressing part (6), a stem (7), a piston (8), and a compression coil spring (9).

[0032] The bonnet (4) has a roughly cylindrical shape and has a lower portion (4a), a middle portion (4b), and an upper portion (4c). The lower portion (4a) is inserted into the body (10), and the bonnet (4) is fixed to the body (10) by screwing the outer circumference of the upper portion of the lower portion (4a) to the body (10). The lower portion (4a) penetrates the inner circumference (50b) of the fixing ring (50), and its lower surface presses against the pressing adapter (80). The middle portion (4b) is located above the lower portion (4a), and the outer shape of the middle portion (4b) is a hexagonal column shape. The upper portion (4c) is provided to extend upward from the outer edge of the middle portion (4b).

[0033] The actuator cap (5) has a roughly covered cylindrical shape and has an outer tube (5a), an upper cover portion (5b), and an inner tube (5c). The actuator cap (5) is fixed to the bonnet (4) by screwing the lower end of the outer tube (5a) to the upper part (4c) of the bonnet (4). The upper cover portion (5b) is provided to cover the upper end of the outer tube (5a). The inner tube (5c) is connected to the inner end of the upper cover portion (5b). A receiving space (5d) for accommodating a piston (8) and a compression coil spring (9) is formed by the bonnet (4) and the actuator cap (5).

[0034] The diaphragm pressing portion (6) is provided on the upper side of the diaphragm (70) and is supported so as to be movable in the vertical direction by the lower portion (4a) of the bonnet (4). The stem (7) is supported so as to be movable in the vertical direction by the middle portion (4b) of the bonnet (4) and is configured to open and close the flow path by moving in close proximity and away from the diaphragm (70).

[0035] The piston (8) is integrally formed with the stem (7), is provided on the upper side of the stem (7), and is supported so as to be movable in the vertical direction by the bonnet (4) and the actuator cap (5). The piston (8) has a base (8a) and an upper protrusion (8b). The base (8a) is roughly disc-shaped, and the stem (7) is integrally provided on its lower surface. The upper protrusion (8b) is roughly cylindrical in shape and extends upward from the upper surface of the base (8a). A pressure chamber (8c) is formed by the lower surface of the base (8a) of the piston (8) and the upper surface of the middle part (4b) of the bonnet (4). A driving fluid inlet passage (8d) is formed in the piston (8) and extends from its upper end to the pressure chamber (8c). The compression coil spring (9) is positioned between the lower surface of the upper cover portion (5b) of the actuator cap (5) and the upper surface of the base (8a) of the piston (8), and constantly presses the piston (8) downward.

[0036] When driving fluid is supplied to the valve (1), the driving fluid passes through the driving fluid inlet path (8d) and flows into the pressure chamber (8c). When the driving fluid flows into the pressure chamber (8c), the piston (8) rises in resistance to the pressure of the compression coil spring (9). Accordingly, the piston (8) provided at the tip of the stem (7) moves to the top dead center, and the diaphragm pressing part (6) moves upward due to the elastic force of the diaphragm (70) and the pressure of the fluid (gas), so that the second inlet path (31) and the second outlet path (32) are connected, and the valve (1) becomes open.

[0037] Next, the assembly method of the valve (1) will be explained with reference to FIGS. 1, 2, 7, and 8. FIG. 8 is an explanatory diagram of the process of fixing the fixing ring (50) to the body (10).

[0038] In the assembly of the valve (1), the valve element and the actuator (3) are assembled sequentially with respect to the body (10). First, an orifice plate (20) is placed on the plate support surface (13a) of the receiving recess (13) of the body (10). A gasket (15) is placed in the annular recess (13c) of the receiving recess (13). A valve seat (40) is fitted into the seat placement groove (30h) of the inner member (30). The inner member (30) is loaded into the receiving recess (13) of the body (10). At this time, the protrusion (30g) of the inner member (30) is inserted into the tubular part (13b). As shown in FIG. 7, two thrust rings (60) are inserted between the flat surface (50g3) of the ring protrusion (50g) of the ring concave portion (50d) and the upper surface (50e) of the concave portion. In the axial direction of the fixed ring (50), the length (L) from the lower surface (60b) (the lowest surface of the two thrust rings (60)) of the lower thrust ring (60) (the upper thrust ring (60) in FIG. 7) to the lower surface (50c) of the fixed ring (50) is measured, and it is determined whether the measured length (L) falls within a predetermined length range. If the measured length (L) does not fall within the predetermined length range, it is because the thrust rings (60) were not inserted or the number of thrust rings (60) is different. These are checked, and the thrust rings (60) that were not inserted are inserted, etc., so that the length (L) falls within the predetermined length range. A predetermined length range is appropriately set based on the depth of the ring recess (50d) (distance between the lower surface (50c) and the upper surface (50e) of the recess), the thickness of the thrust ring (60), and the number of thrust rings (60) inserted.

[0039] When the measured length (L) falls within a predetermined length range, the fixed ring (50) and the thrust ring (60) are inverted vertically from the state of (b) in Fig. 7, as shown in Fig. 8, so that the lower surface (50c) of the fixed ring (50) is lowered. Since the outer circumference (60c) of the thrust ring (60) is located above the ring protrusion (50g) in the axial direction of the fixed ring (50), the outer circumference (60c) rests on the flat surface (50g3) of the ring protrusion (50g), thereby preventing the thrust ring (60) from slipping out of the ring recess (50d) of the fixed ring (50). Then, the fixing ring (50) covers the inner member (30) from the upper side, and the male threaded portion (50a) of the fixing ring (50) is screwed into the female threaded portion (13h) of the receiving recess (13), thereby pressing the inner member (30) toward the bottom surface through the thrust ring (60). The fixing ring (50) is tightened until the contact surface (30c) of the inner member (30) comes into contact with the contact surface (13d) of the body (10), and the gasket (15), orifice plate (20), and inner member (30) are fixed to the body (10).

[0040] A diaphragm (70) is placed on the diaphragm support portion (30j) of the inner member (30), a pressing adapter (80) is placed on the diaphragm (70), and the bonnet (4) of the actuator (3) is screw-coupled to the female thread portion (13h) of the receiving recess (13). Accordingly, the valve (1) of the present embodiment is assembled.

[0041] In this way, in the valve (1) of the present embodiment, two thrust rings (60) can be inserted between the flat surface (50g3) of the ring protrusion (50g) of the ring concave portion (50d) and the upper surface (50e) of the concave portion, and the outer circumference (60c) of the thrust ring (60) is configured to be located on the upper side of the ring protrusion (50g) in the axial direction of the fixed ring (50). Because of this, when assembling the valve (1), the fixed ring (50) can be pressed against the inner member (30) while the thrust ring (60) is mounted at a predetermined position on the fixed ring (50), so the occurrence of misalignment of the thrust ring (60) can be suppressed, and thus the assembly of the valve (1) becomes easier.

[0042] In the axial direction of the fixed ring (50), the length (L) from the lower surface (60b) of the lower thrust ring (60) to the lower surface (50c) of the fixed ring (50) is configured to fall within a predetermined length range. Therefore, by determining whether the length (L) falls within a predetermined length range, the omission of insertion of the thrust ring (60) and the error in the lifespan of the thrust ring (60) can be prevented.

[0043] The present disclosure is not limited to the embodiments described above. Those skilled in the art may make various additions or modifications within the scope of the present disclosure.

[0044] For example, the valve to which the invention of the present disclosure can be applied is not limited to the valve (1) shown above, but can be applied to a valve having a body (10), an inner member (30), a fixing ring (50), and a thrust ring (60) similar to the valve (1). In the above embodiment, there were two thrust rings (60), but one or more may be sufficient. The ring protrusion (50g) was provided over the entire inner surface of the concave portion (50f), but it may be provided over a part of the inner surface of the concave portion (50f) as long as it prevents the thrust ring (60) from slipping out. Although the gasket (15) is made of a metal such as annealed stainless steel, in cases where heat resistance is not particularly required, it may be made of a resin material such as fluoropolymer (PCTFE), for example.

[0045] In the above embodiment, the ring projection (50g) of the fixed ring (50) is provided integrally with respect to the inner surface of the concave portion (50f), but the ring projection may be provided separately with respect to the inner surface of the concave portion (50f). As shown in FIG. 9, an annular groove (50h) extending in the circumferential direction is formed on the inner surface of the concave portion (50f) of the fixed ring (50), and an O-ring (51) is inserted into the groove (50h). A part of the O-ring (51) is provided to protrude inward from the inner surface of the concave portion (50f). The O-ring (51) corresponds to the ring projection. The thrust ring (60) is inserted between the O-ring (51) and the upper surface of the concave portion (50e) by elastically deforming the O-ring (51). With this configuration, the occurrence of misalignment of the thrust ring (60) can be suppressed, making it easier to assemble the valve (1). Additionally, since the thrust ring (60) can be inserted by elastically deforming the O-ring (51), the thrust ring (60) can be installed on the fixed ring (50) even if it is not elastically deformed. Also, instead of an O-ring, an elastic ring such as a snap ring may be used. Furthermore, instead of an O-ring, it is possible to use an annular member with a male screw formed on the outer side and a female screw formed on the surface of the inner circumferential surface (50f) of the concave part of the fixed ring (50), and to screw-couple the annular member to the inner circumferential surface (50f) of the concave part of the fixed ring (50), thereby making it possible to replace the ring protrusion. Explanation of the symbols

[0046] 1: Valve 10: Body 11: First inflow channel 12: First Outflow 13: Receiving depression 13a: Plate support surface, 13b: Ordinary portion, 13c: Annular concave portion, 13d: Contact surface, 13h: Female thread section 30: Inner absence 30k: Annular upper surface, 31: Second inlet, 32: Second outlet 50: Fixed ring 50a: Male screw section, lower surface: 50c, 50d: Ring recess, 50e: Recess upper surface, 50f: Inner surface of the concave part, 50g: Ring protrusion 51: O-ring 60: Thrust ring 60a: Top surface, 60b: Bottom surface, 60c: Outer periphery L: Length

Claims

Claim 1 A body having a receiving recess in which a first flow path is formed and is open on the upper surface and the first flow path is open on the lower surface; an inner member disposed within the receiving recess and having a second flow path formed therein that communicates with the first flow path; a fixing ring located on the upper side of the inner member and screw-coupled to a threaded portion formed on the inner circumference of the receiving recess to press the inner member toward the lower surface; and a thrust ring interposed between the inner member and the fixing ring to suppress the accompanying rotation of the inner member caused by the rotation of the fixing ring, wherein the second flow path is opened on the upper surface of the inner member and an annular upper surface is formed around it, and the thrust ring is disposed on the annular upper surface, and the fixing ring has an annular shape, and a ring recess is formed on its lower surface that is concave toward the upper side and into which the thrust ring is inserted, and the ring recess is an annular shape that is perpendicular to the axial direction of the fixing ring and abuts the upper surface of the thrust ring A valve having an upper surface of a concave portion and an inner surface of a concave portion extending along the circumferential direction of the fixed ring and covering the outer circumference of the thrust ring, wherein a ring projection is provided on the inner surface of the concave portion and the outer circumference of the thrust ring is located above the ring projection in the axial direction. Claim 2 A valve according to claim 1, wherein, in the axial direction, the length from the lowest surface of the thrust ring to the lower surface of the fixed ring is configured to fall within a predetermined length range. Claim 3 A body having a receiving recess in which a first flow path is formed and is open on the upper surface and the first flow path is open on the lower surface; an inner member disposed within the receiving recess and having a second flow path formed therein that communicates with the first flow path; a fixing ring located on the upper side of the inner member and screw-coupled to a threaded portion formed on the inner circumference of the receiving recess to press the inner member toward the lower surface; and a thrust ring interposed between the inner member and the fixing ring to suppress the accompanying rotation of the inner member caused by the rotation of the fixing ring, wherein the second flow path is opened on the upper surface of the inner member and an annular upper surface is formed around it, and the thrust ring is disposed on the annular upper surface, and the fixing ring has an annular shape, and a ring recess is formed on its lower surface that is concave toward the upper side and into which the thrust ring is inserted, and the ring recess is an annular shape that is perpendicular to the axial direction of the fixing ring and abuts the upper surface of the thrust ring A method of assembling a valve having an upper surface of a concave portion and an inner surface of a concave portion that extends along the circumferential direction of the fixed ring and covers the outer surface of the thrust ring, wherein a ring projection is provided on the inner surface of the concave portion and the outer circumferential portion of the thrust ring is located above the ring projection in the axial direction; wherein the inner member is placed in the receiving concave portion of the body, the thrust ring is inserted between the ring projection of the ring concave portion of the fixed ring and the upper surface of the concave portion, and the fixing ring is screw-coupled to a threaded portion formed on the inner surface of the receiving concave portion so as to cover the inner member from the upper side with the lower surface of the fixed ring facing downward, thereby pressing the inner member toward the bottom surface through the thrust ring to fix the inner member to the body. Claim 4 A method for assembling a valve according to paragraph 3, wherein the thrust ring is positioned to abut the upper surface of the concave portion of the ring, and the length from the lowest surface of the thrust ring to the lower surface of the fixed ring is measured to be within a predetermined length range.

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