Pressure adjusting valve

Abstract

The invention provides a pressure adjusting valve capable of suppressing lateral vibration of a valve core and realizing low cost of an elastic component. A pressure adjustment valve (100a) is provided with: a valve body (10); a valve body (20); a guide member (60) that has a plurality of support sections (62) that extend in the direction of the axis (L) and are arranged on the same circumference when viewed from the axial direction, is fixed to the valve body, and guides the movement of the valve body in the axial direction by being in sliding contact with the inner peripheral surface (12b) of the valve body; and an elastic member (70) that is separate from the guide member, is fixed to the guide member, and urges the guide member in one direction orthogonal to the axis, and at least one of the plurality of support sections (62) becomes a constant contact section (62a) that constantly contacts the inner peripheral surface (12b) of the valve body by the urging force of the elastic member (70). As a result, it is possible to eliminate the conventional problem point 1 (generating lateral vibration of the valve body) and the conventional problem point 2 (the cost of the elastic member is high).

Description

Technical Field

[0001] The present invention relates to a pressure regulating valve including an elastic member that urges a guide portion in one direction perpendicular to an axis. Background Art

[0002] Among the pressure regulating valves whose opening is variably controlled according to the pressure acting on the valve body, there is a pressure regulating valve that uses an elastic member that urges in a direction perpendicular to the axis in order to suppress vibration of the valve body caused by a sudden pressure change of the working fluid.

[0003] For example, in Patent Document 1, Fig.10 As shown in the figure, a pressure regulating valve 1000 (hereinafter referred to as "the conventional pressure regulating valve 1") is described, which includes: a valve body 1010 having a primary port 1001A, a secondary port 1001B and a valve seat 1012a; a valve core 1020 that is seated or unseated relative to the valve seat 1012a; a sliding unit 1030 that supports the sliding of the valve core 1020 in the direction of the axis L through a cylinder member 1031 and a piston member 1033; an adjustment spring unit 1040 that adjusts the force of the valve spring 1041 via an adjustment screw member 1042; and a pressure-sensing bellows unit 1050 having a pressure-sensing bellows 1051. In addition, in order to suppress the vibration of the valve core 1020, the conventional pressure regulating valve 1 further includes an elastic member 1070 that abuts against the inner peripheral surface 1012b of the valve body 1010 and provides sliding resistance to the valve core 1020.

[0004] The elastic component 1070 has a structure in which a plurality of legs 1072 composed of an elastic body of the same structure are evenly arranged in the circumferential direction, but the leg portions 1072 do not have strong rigidity in the direction orthogonal to the axis L, and therefore lateral vibration (vibration in the direction orthogonal to the axis L) of the valve core 1020 is still generated and is difficult to suppress (hereinafter referred to as "existing problem 1 (generating lateral vibration of the valve core)").

[0005] In contrast, although the illustration is omitted, in Patent Document 2 (especially referring to Fig. 9 ) describes a pressure regulating valve (hereinafter referred to as "the conventional pressure regulating valve 2"), which is provided with an elastic component in which a plurality of legs composed of an elastic body of the same structure are unevenly arranged in the circumferential direction, and the valve core and the working rod are eccentric from the axis by the elastic component, so that a part of the working rod contacts the working rod insertion hole, thereby applying sliding resistance to the valve core. Among them, the elastic component in the conventional pressure regulating valve 2 is not a component that actively applies sliding resistance to the valve core, but in order to apply force to the valve core in a direction orthogonal to the axis, it can also be considered to replace the elastic component of the conventional pressure regulating valve 1.

[0006] However, the elastic component in the existing pressure regulating valve 2 can apply force to the valve core in a direction orthogonal to the axis, and on the other hand, a plurality of legs composed of an elastic body of the same structure are unevenly arranged in the circumferential direction as an integrated structure, so a large number of manufacturing steps are required, which may increase the cost (hereinafter referred to as "existing problem 2 (high cost of elastic components)").

[0007] In addition, the multiple legs in the elastic component of the existing pressure regulating valve 2, like the existing pressure regulating valve 1, do not have strong rigidity in the direction orthogonal to the axis. On the other hand, there is a deviation in the deflection amount, and the force direction orthogonal to the axis cannot be uniformly determined. Therefore, the existing problem 1 (generating lateral vibration of the valve core) still exists.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Patent Application Publication No. 2020-16290

[0011] Patent Document 2: Japanese Patent Application Publication No. 2019-39579 Summary of the invention

[0012] Problems to be solved by the invention

[0013] An object of the present invention is to provide a pressure regulating valve capable of suppressing lateral vibration of a valve element and reducing the cost of an elastic member.

[0014] Solutions to Solve Problems

[0015] In order to solve the above-mentioned problems, the pressure regulating valve comprises: a valve body, which has a valve seat; a valve core, which moves in the axial direction and is seated or unseated relative to the valve seat; a guide part, which has a plurality of support parts extending in the axial direction and arranged on the same circumference when viewed from the axial direction, and is fixed to the valve core, and guides the axial movement of the valve core by sliding contact with the inner circumferential surface of the valve body; and an elastic component, which is separate from the guide part and is fixed to the guide part, and applies a force to the guide part in a direction orthogonal to the axis, so that at least one of the plurality of support parts of the guide part becomes a constant contact part that is always in contact with the inner circumferential surface of the valve body by utilizing the force of the elastic component.

[0016] Furthermore, in the pressure regulating valve described above, in the valve open state, an area occupied by the plurality of support portions of the guide portion in the flow path may be smaller than an area of ​​the flow path opening in the radial direction.

[0017] In addition, in the above-mentioned pressure regulating valve, the elastic component may also have at least one leg portion formed of an elastic body arranged on the same circumference, and when viewed from the axial direction, the leg portion only exists in an area not including a boundary line on the side opposite to the always-contacting portion separated by the axis.

[0018] Furthermore, in the above-mentioned pressure regulating valve, in the guide portion, the plurality of support portions may consist of three support portions arranged at equal intervals on the same circumference, and the constant contact portion may consist of one support portion.

[0019] Furthermore, in the above-mentioned pressure regulating valve, the valve element and the guide portion may be separate bodies and may be fixed to each other in a concentric circle shape with respect to the axis.

[0020] Effects of the Invention

[0021] According to the present invention, it is possible to provide a pressure regulating valve capable of suppressing lateral vibration of a valve element and reducing the cost of an elastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 2 are cross-sectional views showing a pressure regulating valve according to the present embodiment of the present invention, wherein (a) is a longitudinal cross-sectional view of the pressure regulating valve, and (b) is a sagittal bottom view viewed from the direction of arrow Ib shown in (a).

[0023] Figure 2 yes Figure 1 The bottom exploded perspective view of the valve core, elastic component and guide component is shown.

[0024] Figure 3 It means that Figure 1 The pressure regulating valve shown is a cross-sectional view of a state in which it is mounted on a piping block.

[0025] Figure 4 Is Figure 3 The enlarged cross-sectional view of the area surrounded by the dotted line IVa shown in FIG. 1 shows a closed valve state (a) and a valve open state (b).

[0026] Figure 5 is an explanatory diagram of a modification example 1 of the elastic member of the present embodiment (with Figure 1 (b) corresponding).

[0027] Figure 6 1 and 2 are explanatory diagrams of a second modification of the elastic member according to the present embodiment, wherein (a) is an enlarged cross-sectional view of a main portion, and (b) is an enlarged cross-sectional view of a region surrounded by a dotted line VIb shown in (a).

[0028] Figure 7 is an explanatory diagram of a modified example of the guide member of this embodiment (with Figure 1 (b) corresponding).

[0029] Figure 8 1 and 2 are explanatory diagrams of a modified example of the valve body according to the present embodiment, wherein (a) is an enlarged cross-sectional view of a main portion, and (b) is an exploded perspective view of the valve body and the elastic member shown in (a) from below.

[0030] Fig. 9 These are explanatory diagrams of a deformation example of a fixed unit of the present embodiment, wherein (a) is an enlarged cross-sectional view of a main portion, (b) is a deformation example 3 of an elastic component in a deformation example of a fixed unit corresponding to (a), and (c) is an upper stereoscopic view of the elastic component shown in (b).

[0031] Fig.10 It is a cross-sectional view showing a pressure regulating valve according to the prior art.

[0032] In the figure:

[0033] 100a~100g—pressure regulating valve; 1A—primary port; 1B—secondary port; 10—valve body; 11—body; 11a—horizontal hole; 11c—central part; 11d—one end; 11l—large diameter part; 11n—narrow neck; 11o—opening; 11s—small diameter part; 11scm—external threaded part; 11u—other end; 12—valve seat part (valve body); 12a—valve seat; 12b—inner circumference; 20, 20E, 20F, 20G—valve core; 21, 21E—valve part ; 22, 22E, 22F, 22G—boss; 23, 23G—recess; 24E—guide; 25E—support; 25Ea—always abutting portion; 26G—annular receiving groove; 30—sliding unit; 31—cylinder component; 32—connecting component; 33—piston component; 40—adjustment spring unit; 41—valve spring; 42—adjustment thread; 42a—main body side adjustment thread; 42b—valve seat side adjustment thread; 50—pressure-sensing bellows unit; 51—pressure-sensing bellows; 52—fixed metal Components; 52a-boss; 60, 60D-guide member (guide); 61-annular fixing portion; 61a-opening; 62, 62D1-supporting portion; 62a, 62D2a-always abutting portion; 62D2-wide supporting portion; 70, 70B, 70C, 70G-elastic member; 71, 71G-annular fixing portion; 71a-opening; 72, 72B, 72C, 72G-leg; 73, 73G-bend portion; 73C-recess; A-storage chamber; B-piping block; Bscf- Internal threaded portion; Cr1, Cr2, Cr3—rivet portion; Fp1—primary side flow path; Fp2—secondary side flow path; G1—first receiving groove; G2—second receiving groove; G3—third receiving groove; G4—fourth receiving groove; Ga—annular groove; Gi—annular sealing groove; L—axis line; L2—straight line connecting the always-contacting portion and the axis line L; Or—O-ring; Osa—area excluding the boundary line on the side opposite to the always-contacting portion across the axis line; P1—primary side pressure; P2—secondary side pressure; w—welding portion. DETAILED DESCRIPTION

[0034] Reference Figures 1 to 9 The embodiment of the present invention will be described in detail. However, the present invention is not limited to the embodiment.

[0035] <About Terminology>

[0036] In the description of this specification and claims, “left”, “right”, “upper”, and “lower” mean Figure 1 (a) Figure 3 , Figure 4 , Figure 6 , Figure 8 (a) Fig. 9In the directions shown in (a) and (b) of the embodiment. In the description of this specification and claims, "one end" and "the other end" mean the "lower end" and "upper end" in the drawings. In the description of this specification and claims, "the effective pressure-bearing area of ​​the pressure-sensing bellows" means the pressure-bearing area calculated as an approximate value based on the average diameter of the minimum inner diameter of the corrugation shape (the inner diameter of the "valley" part of the corrugation shape protruding toward the central axis side of the pressure-sensing bellows) and the maximum outer diameter (the outer diameter of the "peak" part of the corrugation shape protruding in the direction away from the central axis of the central axis side of the pressure-sensing bellows). In the description of this specification and claims, "fixed to the valve core" means "fixed to the valve core integrally or separately". In the description of this specification and claims, "fixed to the guide portion" means also including a method in which the guide portion is not in direct contact with the elastic component, a method in which the valve core and the elastic component are fixed at different positions, and a method in which the valve core and the guide portion are fixed. In the description of this specification and claims, “perpendicular to the axis” is not limited to an angle of strictly 90° with respect to the axis, but means including an angle close to 90° with respect to the axis.

[0037] (Present Embodiment)

[0038] <About the structure of the pressure regulating valve>

[0039] use Figure 1 as well as Figure 2 The pressure regulating valve 100a of this embodiment of the present invention is described. The pressure regulating valve 100a is mainly composed of a valve body 10, a valve core 20, a sliding unit 30, an adjustment spring unit 40, a pressure-sensing bellows unit 50, a guide component (guide portion) 60, and an elastic component 70. The following describes the respective structures of the pressure regulating valve 100a in sequence. In addition, a high-pressure primary-side pressure P1 is introduced to the primary-side port 1A, and on the other hand, a low-pressure secondary-side pressure P2 is introduced to the secondary-side port 1B.

[0040] Among them, the details will be described later. In the present embodiment, the pressure regulating valve 100a adopts an elastic component 70 which is separate from the guide component 60, fixed to the guide component 60 and applies force to the guide component 60 in a direction orthogonal to the axis L, thereby eliminating the existing problems 1 and 2 (lateral vibration of the valve core and high cost of the elastic component).

[0041] The valve body 10 is made of a metal such as stainless steel or aluminum alloy, and includes: a body 11 having a bottomed cylindrical shape; and a valve seat portion (valve body) 12 having a substantially cylindrical shape and being separate from the body 11. In addition, in the present embodiment, the body 11 and the valve seat portion 12 are separate bodies, but the present invention is not limited thereto, and the body 11 and the valve seat portion 12 may also be integral.

[0042] The main body 11 defines a storage chamber A inside, and has a plurality of (e.g., four) horizontal holes 11a arranged evenly in the circumferential direction and defining the secondary port 1B on the side wall when viewed from the axis L. In addition, the main body 11 has a main body side adjustment threaded portion 42a formed on the inner circumferential surface of one end 11d that is screwed with the valve seat portion 12. In addition, the main body 11 has an opening portion 11o coaxial with the axis L formed at the other end 11u.

[0043] The valve seat portion 12 includes an annular valve seat 12 a , an inner peripheral surface 12 b defining the primary port 1A, and a valve seat portion side adjustment threaded portion 42 b formed on the outer peripheral surface and threadedly engaged with the body 11 .

[0044] The valve core 20 is made of a metal such as stainless steel or phosphor bronze and has a substantially circular plate shape. Figure 2 As shown, the valve core 20 includes: an annular valve portion 21, which protrudes toward one end side at the outer periphery; a boss portion 22, which protrudes toward one end side on the same axis as the axis L; and a recessed portion 23, which is formed between the valve portion 21 and the boss portion 22 and is recessed toward the other end side.

[0045] The valve portion 21 has an outer diameter larger than that of the valve seat 12a, and is seated on or away from the valve seat 12a by moving in the direction of the axis L. Figure 2 As shown, the boss portion 22 is sequentially fitted into the opening portion 71 a of the elastic member 70 and the opening portion 61 a of the guide member 60 , and the annular fixing portion 71 of the elastic member 70 and the annular fixing portion 61 of the guide member 60 are sequentially accommodated in the recess 23 .

[0046] The sliding unit 30 includes: a cylindrical cylinder member 31 fixed to the valve core 20 at one end; a connecting member 32 abutting against a fixing metal member 52 at the other end by the force of the valve spring 41; and a piston member 33, the other end of which is fixed to the connecting member 32 by riveting and supported to be able to move forward and backward relative to the cylinder member 31. The sliding unit 30 is provided inside the pressure-sensing bellows 51. Among them, the valve spring 41 is clamped between the cylinder member 31 and the connecting member 32 in a pressed state. Therefore, the sliding unit 30 transmits the force of the valve spring 41 to the pressure-sensing bellows 51, and the pressure-sensing bellows 51 is urged in the extension direction along the axis L.

[0047] The adjustment spring unit 40 includes a valve spring 41 as a compression spring, and an adjustment threaded portion 42 for adjusting the force acting on the valve core 20 by expanding and contracting the valve spring 41 and the pressure-sensing bellows 51. The adjustment threaded portion 42 is composed of a main body side adjustment threaded portion 42a formed on the inner peripheral surface of one end side of the main body 11 and a valve seat portion side adjustment threaded portion 42b formed on the outer peripheral surface of the valve seat portion 12, which are screwed together.

[0048] The force adjustment unit for the valve core 20 rotates the valve seat portion 12 relative to the main body 11 and moves it in the direction of the axis L via the adjustment thread portion 42, thereby adjusting the expansion and contraction of the valve spring 41 and the pressure-sensing bellows 51, that is, the force applied to the valve core 20. In addition, the force fixing unit for fixing the valve seat portion 12 relative to the main body 11 fixes the valve seat portion 12 and one end side of the main body 11 to each other by welding or the like after adjusting the force applied to the valve core 20 by the force adjustment unit so as to open the valve at a set pressure.

[0049] The pressure sensing bellows unit 50 is made of metal such as stainless steel or phosphor bronze and includes a pressure sensing bellows 51 formed into a bellows shape extending in the axis L direction by press forming, and a fixing metal fitting 52 having a substantially disk shape.

[0050] One end of the pressure-sensing bellows 51 is welded and fixed to the other end surface on the outer peripheral side of the valve body 20 , and the other end is welded and fixed to one end surface on the outer peripheral side of the fixing member 52 , thereby sealing the inside.

[0051] The effective pressure-receiving area of ​​the pressure-sensing bellows 51 is set to be consistent with the pressure-receiving area of ​​the valve core 20 surrounded by the valve seat portion 12. As a result, the upward force acting on the pressure-sensing bellows 51 and the downward force acting on the valve core 20 are offset by the secondary side pressure P2. Therefore, the valve core 20 is not affected by the secondary side pressure P2, and the opening of the valve core 20 can be variably controlled according to the change of the primary side pressure P1. In addition, the pressure-receiving area (effective pressure-receiving area) calculated as an approximate value based on the average inner diameter of the minimum inner diameter and the maximum inner diameter of the corrugated shape can also be used to set the size of each part of the pressure regulating valve 100a.

[0052] The fixing member 52 has a boss portion 52 a protruding toward the other end on the same axis as the axis L. After being fitted into the opening 11 o of the main body 11 , the boss portion 52 a is fixed to the main body 11 by forming a caulking portion Cr1 through caulking.

[0053] The guide member (guide portion) 60 is made of a metal such as stainless steel or phosphor bronze, and is formed by stamping to form a relatively thick and rigid member. Figure 2 As shown, the guide component 60 includes: an annular fixing portion 61, which has an opening portion 61a on the same axis as the axis L; and a plurality of support portions 62, which are connected to the outer peripheral side of the annular fixing portion 61, extend to one end side in the direction of the axis L, and are arranged on the same circle when viewed from the direction of the axis L (for example, three are arranged at equal intervals on the same circle).

[0054] Next, the guide member 60 will be described in detail. First, among the plurality of support portions 62, the other end side is connected only to the outer side of the annular fixing portion 61, and one end side has a free end. Therefore, a space with one end side open is defined between the adjacent support portions 62 on the one end side, so that the fluid flows smoothly along the inner peripheral surface 12b of the valve seat portion 12 in the space, and as a result, the pressure loss can be reduced.

[0055] Next, the support portion 62 is connected to the outer peripheral side of the annular fixing portion 61. At this time, when viewed from the axis L direction, there is a radial gap (at least equal to or greater than the thickness of the support portion 62) between the plurality of fan-shaped spaces, that is, between the imaginary circle passing through the contact portions of the plurality of support portions 62 in contact with the inner peripheral surface 12b and the outer diameter of the annular fixing portion 61, and there is a circumferential gap between adjacent support portions 62. Therefore, the leg portion 72 of the elastic member 70 can be arranged in the plurality of fan-shaped spaces.

[0056] The elastic member 70 is made of a metal such as stainless steel or phosphor bronze, and is formed by stamping to form a relatively thin and elastic member. Figure 2 As shown in FIG. 1 , the elastic member 70 includes: a circular fixing portion 71 having an opening 71a on the same axis as the axis L; a leg portion 72 connected to the outer peripheral side of the circular fixing portion 71 and extending toward one end side in the direction of the axis L; and a bent portion 73 formed between one end side and the other end side of the leg portion 72 and having a convex shape with respect to the inner peripheral surface 12b of the valve seat portion 12. In addition, when the bent portion 73 is brought into contact with the inner peripheral surface 12b of the valve seat portion 12, a force is generated by the deflection of the leg portion 72.

[0057] <Integrated structure of valve core, guide member and elastic member>

[0058] like Figure 1 As shown in (b) of FIG. 1 , the fixing means of the valve body 20 , the guide member 60 , and the elastic member 70 employs a plurality of welded portions w formed by spot welding or the like.

[0059] Specifically, if Figure 2 As shown, the boss portion 22 is sequentially fitted into the opening portion 71a of the elastic component 70 and the opening portion 61a of the guide component 60, while the annular fixing portion 71 of the elastic component 70 and the annular fixing portion 61 of the guide component 60 are sequentially accommodated in the recessed portion 23. Afterwards, the valve core 20, the guide component 60 and the elastic component 70 are firmly joined to each other in a concentric circle shape without a gap relative to the axis L through the welding portion w as a fixing unit by spot welding or the like. At this time, the welding portion w is provided at equal intervals on the same circumference and includes two locations on a straight line connecting the always abutting portion 62a and the leg portion 72. In addition, as shown in FIG. Figure 1As shown in (b) of FIG. 1 , when viewed from the axis L direction, the leg portion 72 and one of the plurality of support portions 62 (the constant contact portion 62 a ) are arranged at symmetrical positions with the axis L interposed therebetween.

[0060] Among them, the multiple rigid support portions 62 guide the movement of the valve core 20 in the direction of the axis L by sliding contact with the inner peripheral surface 12b of the valve seat portion 12. In addition, the curved portion 73 contacts the inner peripheral surface 12b of the valve seat portion 12, so that the elastic leg portion 72 bends while applying force to the valve core 20, that is, the guide member 60 in a direction orthogonal to the axis L. As a result, when viewed from the direction of the axis L, one support portion 62 arranged at a symmetrical position with the leg portion 72 across the axis L always contacts the inner peripheral surface 12b of the valve seat portion 12 by the elastic force of the leg portion 72, and becomes a constant contact portion 62a that applies a stable sliding resistance.

[0061] In this embodiment, if Figure 1 As shown in (b), when viewed from the axis L, the support portion 62 of the guide member 60 has an arc shape corresponding to the inner peripheral surface 12b of the valve seat portion 12, thereby increasing the contact area with the inner peripheral surface 12b of the valve seat portion 12. In addition, the curved portion 73 of the elastic member 70 has a convex shape relative to the inner peripheral surface 12b of the valve seat portion 12, so it can slide smoothly.

[0062] <About installation of pressure regulating valve>

[0063] First, use Figure 3 The shapes of the main body 11 and the piping block B are described.

[0064] The main body 11 is formed with a large diameter portion 111, a central portion 11c, and a small diameter portion 11s, the outer diameter of which gradually decreases from one end 11d toward the other end 11u along the axis L. A continuously connected neck portion 11n is formed between the large diameter portion 111 and the central portion 11c. In addition, an external threaded portion 11scm that is threaded with the block component B is formed on the outer peripheral surface of the other end side of the central portion 11c.

[0065] Next, the piping block B has an insertion hole along the axis L direction, and a primary side flow path Fp1 and an annular groove Ga are formed on one end side of the insertion hole. In addition, the secondary side flow path Fp2 formed in a direction orthogonal to the axis L direction is connected to the annular groove Ga. In addition, a plurality of annular step portions that are successively reduced in diameter in a step-like manner from the annular groove Ga toward the other end side are formed in the insertion hole along the axis L direction. The first receiving groove G1, the second receiving groove G2, the third receiving groove G3 and the fourth receiving groove G4 are sequentially formed in the plurality of annular step portions. Furthermore, an annular sealing groove Gi for receiving an O-ring Or is formed on the other end side of the primary side flow path Fp1. In addition, an internal threaded screwing portion Bscf is formed on the inner circumferential surface of the second receiving groove G2.

[0066] In addition, in this embodiment, Figure 3 Although the shapes of the main body 11 and the piping block B are described as shown, this is just an example, and any shape may be used as long as the piping block B has an insertion hole and the main body 11 has an outer shape that can be inserted into the insertion hole.

[0067] <About installation operation>

[0068] The installation operation of the pressure regulating valve 100a to the piping block B is described. The pressure regulating valve 100a is inserted from one end side of the primary side flow path Fp1 of the piping block B along the axis L direction. Then, while the external threaded screwing portion 11scm of the main body 11 is screwed with the internal threaded screwing portion Bscf of the block member B, the main body 11 is moved toward the other end side in the axis L direction until the other end 11u of the main body 11 abuts against the piping block B. In the installed state of the pressure regulating valve 100a, the primary side port 1A defined by the valve seat portion 12 is connected to the primary side flow path Fp1 into which the primary side pressure P1 is introduced, and the secondary side port 1B defined by the horizontal hole 11a of the main body 11 is connected to the secondary side flow path Fp2 into which the secondary side pressure P2 is introduced. At this time, an O-ring Or is clamped between the large diameter portion 11l of the main body 11 and the annular sealing groove Gi, and the gap between the main body 11 and the piping block B is sealed. Furthermore, since the caulking portion Cr1 of the fixing member 52 is received in the fourth receiving groove G4, interference with the piping block B is prevented.

[0069] In addition, in the installation state of the pressure regulating valve 100a of this embodiment, as shown in FIG. Figure 3 As shown, any one of the secondary ports 1B is arranged opposite to the secondary flow path Fp2, but the present invention is not limited thereto. For example, a plurality of (for example, four) secondary ports 1B are evenly arranged in the circumferential direction, and an annular groove Ga is provided between the secondary port 1B and the secondary flow path Fp2, so that the fluid from the plurality of secondary ports 1B can smoothly flow to the secondary flow path Fp2 via the flow along the circumferential direction of the annular groove Ga, and therefore, the secondary port 1B may not be arranged opposite to the secondary flow path Fp2. In addition, in the present embodiment, the present invention shows the case where the annular groove Ga is formed in the piping block B, but the present invention is not limited thereto. For example, the annular groove Ga may not be formed in the piping block B. In this case, an annular space is formed around the horizontal hole 11a due to the difference in outer diameter between the large diameter portion 111 and the central portion 11c. Therefore, as in the case of having the annular groove Ga, the fluid from the plurality of secondary side ports 1B can flow smoothly to the secondary side flow path Fp2 via the circumferential flow along the annular space.

[0070] <About the Operation of the Pressure Regulating Valve>

[0071] use Figure 4The operation of the pressure regulating valve 100 a will be described. In the pressure regulating valve 100 a , a high-pressure primary-side pressure P1 is introduced to the primary-side port 1A, and a low-pressure secondary-side pressure P2 is introduced to the secondary-side port 1B.

[0072] First, use Figure 4 (a) describes the pressure regulating valve 100a in the closed valve state. If the pressure of the primary port 1A rises, a valve opening force based on the differential pressure acts on the valve core 20. However, the valve core 20 does not leave the valve seat 12a until the valve opening force exceeds the combined force of the pressure-sensing bellows 51 and the valve spring 41 and the sliding resistance based on the always-contacting portion 62a.

[0073] Next, use Figure 4 (b) describes the pressure regulating valve 100a in the valve-open state. If the pressure at the primary port 1A further increases, the valve-opening force acting on the valve core 20 exceeds the combined force of the pressure-sensing bellows 51 and the valve spring 41 and the sliding resistance based on the always-contacting portion 62a, and the valve core 20 is separated from the valve seat 12a, and the fluid flows from the primary port 1A to the secondary port 1B.

[0074] When the pressure at the primary port 1A decreases, the valve opening force acting on the valve element 20 becomes lower than the combined force of the urging force of the pressure sensing bellows 51 and the valve spring 41 and the sliding resistance of the permanent contact portion 62a, and the valve element 20 is seated on the valve seat 12a again.

[0075] <Countermeasures for existing problems 1 and 2>

[0076] Among them, in the conventional pressure regulating valve 1 and the conventional pressure regulating valve 2, in the transition state from one of the closed valve state and the open valve state to the other, and in the open valve state, the movement of the valve core becomes unstable due to the vibration caused by the movement of the valve core in the axial direction, the influence of the peeling vortex caused by the fluid passing through the periphery of the valve core, etc., and there is the conventional problem 1 (the lateral vibration of the valve core occurs). In addition, in the conventional pressure regulating valve 2, a large number of manufacturing processes are required to produce the elastic component, so there is the conventional problem 2 (the cost of the elastic component is high).

[0077] In contrast, in the pressure regulating valve 100a of the present embodiment, regardless of the valve closing state or the valve opening state, the predetermined support portion 62 of the guide member 60 is always in contact with the inner peripheral surface 12b of the valve seat portion 12 as the abutting portion 62a in one direction (the direction of the force may be slightly inclined in the vertical direction, the horizontal direction, etc.) perpendicular to the axis L, i.e., by the elastic force of the leg portion 72 of the elastic member 70, thereby providing a stable sliding resistance, thereby eliminating the conventional problem 1 (generating lateral vibration of the valve core). In addition, in the pressure regulating valve 100a of the present embodiment, the functions of the guide member 60 and the elastic member 70 (having a rigid guiding function and an elastic urging function) are completely separated, and the respective structures are simplified and formed separately, thereby improving productivity, and thus eliminating the conventional problem 2 (high cost of the elastic member).

[0078] <Countermeasures to Concerns>

[0079] Furthermore, in the conventional pressure regulating valve 2 , an elastic member having a plurality of legs is present in the flow path, which hinders the flow, and thus there is a concern that pressure loss may increase (hereinafter referred to as “concern (increase in pressure loss)”).

[0080] In contrast, in the pressure regulating valve 100a of the present embodiment, the constant contact portion 62a of the support portion 62 is provided as one, so that the number of the support portions 62 of the guide member 60 can be reduced as much as possible. Figure 4 As shown in (b), in the valve open state, the area occupied by the plurality of support portions 62 of the guide member 60 in the flow path (with Figure 1 The area of ​​the inner peripheral surface 12b where the support portion 62 exists in (b) corresponds to the area of ​​the flow path opening in the radial direction (corresponding to Figure 1 The area of ​​the inner peripheral surface 12b where the support portion 62 does not exist in (b) is small, so the concern (increase in pressure loss) can be eliminated.

[0081] In addition, in the present embodiment, the number of the support portions 62 of the guide component 60 is three, but this is not limited thereto. For example, as long as the area occupied by the plurality of support portions 62 in the flow path is smaller than the area of ​​the flow path opening in the radial direction in the valve open state, the number of the support portions 62 of the guide component 60 may be more than four.

[0082] In summary, in the pressure regulating valve 100a of the present embodiment, the elastic member 70 is used, which is separate from the guide member 60, fixed to the guide member 60, and applies force to the guide member 60 in a direction orthogonal to the axis L, thereby eliminating the existing problem 1 (generation of lateral vibration of the valve core) and the existing problem 2 (high cost of the elastic member). In addition, in the pressure regulating valve 100a of the present embodiment, since the always-contacting portion 62a is provided as one, it always contacts the inner peripheral surface 12b of the valve seat portion 12, and a stable sliding resistance can be given. In the valve open state, by making the area occupied by the multiple support portions 62 of the guide member 60 in the flow path smaller than the flow path area opened in the radial direction, it is possible to eliminate the concern (increase in pressure loss).

[0083] (Elastic member modification example 1 of this embodiment)

[0084] use Figure 5 , the pressure regulating valve 100b in the elastic component modification example 1 of the present embodiment is described. In addition, the pressure regulating valve 100b in the elastic component modification example 1 of the present embodiment is different from the pressure regulating valve 100a of the present embodiment in that the number of the leg portions 72B of the elastic component 70B is set to two, but the other structures are the same as those of the present embodiment. Among them, the same symbols are marked on the same structures, and repeated descriptions are omitted.

[0085] <About elastic components>

[0086] The elastic member 70B has two legs 72B arranged on the same circumference on the outer circumference side of the annular fixing portion 71B and forming a curved portion 73B on one end side. When viewed from the axis L direction, the two legs 72B exist only in an area Osa not including a boundary line on the side opposite to the always-contacting portion 62a across the axis L. In addition, the two legs 72B are arranged at positions symmetrical about a straight line L2 connecting the always-contacting portion 62a and the axis L when viewed from the axis direction in such a way that the resultant force of the elastic forces possessed by the two legs 72B is generated in a direction orthogonal to the axis L. In this way, by adopting the two legs 72B, the force acting on the always-contacting portion 62a can be set relatively freely, so that the always-contacting portion 62a can be more reliably always in contact, and a stable sliding resistance can be applied.

[0087] The elastic member 70B in the elastic member modification 1 of the present embodiment has two legs 72B, but is not limited thereto, and for example, a plurality of legs 72B may be provided. In addition, the plurality of legs 72B exist only in the region Osa not including the boundary line on the side opposite to the always-contacting portion 62a on the same circumference, and need to be arranged at a position where the resultant force of the elastic forces of the plurality of legs 72B is mainly generated in one direction orthogonal to the axis L.

[0088] In summary, the pressure regulating valve 100b in the elastic component modification example 1 of the present embodiment is the same as the present embodiment, and the shape of the elastic component 70B is still simplified, so the effect is the same as the present embodiment, that is, the existing problem 1 (generating lateral vibration of the valve core), the existing problem 2 (high cost of the elastic component) and the concern (increase in pressure loss) can be eliminated respectively. In addition, in the elastic component modification example 1 of the present embodiment, the elastic component 70B has two legs 72B, so that the force acting on one always-contacting portion 62a can be set more freely, so that it can always contact more reliably and apply stable sliding resistance.

[0089] (Elastic member modification example 2 of this embodiment)

[0090] use Figure 6 , the pressure regulating valve 100c in the elastic component modification example 2 of the present embodiment is described. In addition, the pressure regulating valve 100c in the elastic component modification example 2 of the present embodiment is different from the pressure regulating valve 100a of the present embodiment in that a recess 73C is used on the leg 72C of the elastic component 70C, but the other structures are the same as those of the present embodiment. Among them, the same symbols are marked on the same structures, and repeated descriptions are omitted.

[0091] <About elastic components>

[0092] like Figure 6 As shown in (b), the elastic member 70C has a concave recess 73C formed at one end of the leg 72C and having a convex shape relative to the inner peripheral surface 12b of the valve seat portion 12. In addition, when the concave recess 73C is brought into contact with the inner peripheral surface 12b of the valve seat portion 12, a force is generated by the bending of the leg 72C. When viewed from the direction of the axis L, the leg 72C and the always-contacting portion 62a are arranged at symmetrical positions across the axis L. Among them, the concave recess 73C has a convex shape relative to the inner peripheral surface 12b of the valve seat portion 12, so it can slide smoothly. In addition, the dimensional management of the curvature radius of the concave recess 73C is simpler than that of the curved portion 73 of the present embodiment. Therefore, by adopting the concave recess 73C, the force on the always-contacting portion 62a can be set relatively freely, so that the always-contacting portion 62a can be more reliably always in contact, and a stable sliding resistance can be applied.

[0093] In summary, the pressure regulating valve 100c in the elastic component modification example 2 of the present embodiment is the same as the present embodiment, and the shape of the elastic component 70C is still simplified, so the effect is the same as the present embodiment, that is, the existing problem 1 (generating lateral vibration of the valve core), the existing problem 2 (high cost of the elastic component) and the concern (increase in pressure loss) can be eliminated respectively. In addition, the elastic component modification example 2 of the present embodiment adopts a recess 73C on the leg 72C, and similarly to the elastic component modification example 1 of the present embodiment, the force applied to a constant contact portion 62a can be set relatively freely, so that it can be more reliably always contacted and provide stable sliding resistance.

[0094] (Modification of the guide member of the present embodiment)

[0095] use Figure 7 , the pressure regulating valve 100d in the modified example of the guide member of the present embodiment is described. In addition, the pressure regulating valve 100d in the modified example of the guide member of the present embodiment is different from the pressure regulating valve 100a of the present embodiment in that the wide width support portion 62D2 is used as the always-contacting portion 62D2a of the guide member 60D, but the other structures are the same as those of the present embodiment. The same symbols are given to the same structures, and repeated descriptions are omitted.

[0096] <About Guide Components>

[0097] like Figure 7 As shown, the guide member (guide portion) 60D includes: an annular fixing portion 61 having an opening portion 61a on the same axis as the axis L; two support portions 62D1 and one wide support portion 62D2, which are connected to the outer circumference of the annular fixing portion 61 and extend toward one end side in the direction of the axis L, and are arranged on the same circumference at intervals when viewed from the direction of the axis L. Among them, the wide support portion 62D2 of the guide member 60 is a constant contact portion 62D2a wider than the support portion 62D1 in the circumferential direction, and has an arc shape corresponding to the inner circumferential surface 12b of the valve seat portion 12 when viewed from the direction of the axis L, so that the contact area with the inner circumferential surface 12b of the valve seat portion 12 can be further increased.

[0098] In summary, the pressure regulating valve 100d in the guide component modification of the present embodiment has the same effect as the present embodiment, that is, it can respectively eliminate the existing problem 1 (generation of lateral vibration of the valve core), the existing problem 2 (high cost of the elastic component) and the concern (increase in pressure loss). In addition, in the guide component modification of the present embodiment, by using the wide support portion 62D2 as a constant contact portion 62D2a, the contact area with the inner peripheral surface 12b of the valve seat portion 12 can be further increased, so that it can be more reliably always contacted, and a stable and relatively large sliding resistance can be applied.

[0099] (Valve core modification example of this embodiment)

[0100] use Figure 8 The pressure regulating valve 100e in the modified example of the valve core of the present embodiment is described. In addition, the pressure regulating valve 100e in the modified example of the valve core of the present embodiment is different from the pressure regulating valve 100a in the present embodiment in that the guide component is omitted and a guide portion 24E having a plurality of support portions 25E and an annular fixing portion 24Ea is used as a part of the valve core 20E, but the other structures are the same as those of the present embodiment. The same symbols are given to the same structures, and repeated descriptions are omitted.

[0101] <About the valve core>

[0102] In the pressure regulating valve 100a of the present embodiment, since the valve core 20, the guide member 60 and the elastic member 70 are provided as different components, the number of parts increases, the assembly operation is complicated, and there is a concern that the inventory management cost will increase (hereinafter referred to as "concern (complicated assembly operation)"). Therefore, in the valve core modification of the present embodiment, the guide member is omitted, and the guide portion 24E having a plurality of support portions 25E is adopted as a part of the valve core 20E.

[0103] Specifically, if Figure 8 As shown in (b), the valve core 20E includes: an annular valve portion 21E formed on the outer periphery of one end side; a boss portion 22E protruding toward one end side on the same axis as the axis L; a guide portion 24E arranged between the valve portion 21E and the boss portion 22E; and a plurality of support portions 25E extending from the guide portion 24E toward one end side in the direction of the axis L and arranged on the same circle when viewed from the direction of the axis L (in this example, three are arranged at equal intervals on the same circle).

[0104] like Figure 8 As shown in (b), the boss portion 22E is engaged with the opening portion 71a of the elastic member 70. Afterwards, by spot welding or the like, the valve core 20E and the elastic member 70 are firmly joined to each other in a concentric circle shape without a gap relative to the axis L via the welding portion w as a fixing unit. In addition, when viewed from the direction of the axis L, the leg portion 72 and one of the multiple support portions 25E (the always-contacting portion 25Ea) are arranged at symmetrical positions across the axis L, so that the always-contacting portion 25Ea is always in contact with the inner peripheral surface 12b of the valve seat portion 12, thereby providing stable sliding resistance. In this way, by adopting the guide portion 24E having multiple support portions 25E as a part of the valve core 20E, concerns (complex assembly work) can be eliminated.

[0105] In summary, the pressure regulating valve 100e in the valve core modification example of the present embodiment has the same effect as the present embodiment, that is, it can eliminate the existing problem 1 (generation of lateral vibration of the valve core), the existing problem 2 (high cost of elastic components) and the concern (increase in pressure loss). In addition, in the valve core modification example of the present embodiment, by adopting the guide portion 24E having a plurality of support portions 25E as a part of the valve core 20E, the concern (complex assembly work) can be eliminated.

[0106] (Modification of the fixing unit of the present embodiment)

[0107] use Fig. 9 (a) of the embodiment of the present invention is to describe the pressure regulating valve 100f in the modified example of the fixing unit. The pressure regulating valve 100f in the modified example of the fixing unit of the present embodiment is different from the pressure regulating valve 100a in the present embodiment in that the rivet portion Cr2 is used as the fixing unit for fixing the guide member 60 and the elastic member 70 to the valve core 20F, but the other structures are the same as those in the present embodiment. The same symbols are given to the same structures, and repeated descriptions are omitted.

[0108] <About fixed unit>

[0109] In the case of using multiple welded portions w in this embodiment, the influence of strain caused by thermal stress on the base material is small but still occurs, so there is a concern that the relative circumferential position accuracy of the multiple support portions 62 and the leg portions 72 will be reduced (hereinafter referred to as "concern (effect caused by thermal stress)"). Therefore, in the fixed unit modification of this embodiment, as Fig. 9 As shown in (a) of FIG. 1 , a caulking portion Cr2 formed by caulking is used as a fixing unit for the valve body 20F, the guide member 60 and the elastic member 70 .

[0110] Specifically, by deforming the front end of the boss portion 22F in the outer diameter direction, the boss portion 22F is sequentially fitted into the opening portion 71a of the elastic member 70 and the opening portion 61a of the guide member 60, and the annular fixing portion 71 of the elastic member 70 and the annular fixing portion 61 of the guide member 60 are sequentially accommodated in the recess 23. After that, by riveting the boss portion 22F, the valve core 20F, the guide member 60, and the elastic member 70 are mutually joined in a concentric circle shape relative to the axis L via the riveting portion Cr2 as the fixing unit. In this way, by adopting the riveting portion Cr2 as the fixing unit, it is possible to eliminate concerns (the influence of thermal stress) and improve the relative circumferential position accuracy of the plurality of support portions 62 and the leg portions 72.

[0111] In summary, the pressure regulating valve 100f in the fixed unit modification of the present embodiment has the same effect as the present embodiment, that is, it can eliminate the existing problem 1 (generating lateral vibration of the valve core), the existing problem 2 (high cost of the elastic component) and the concern (increase in pressure loss). In addition, in the fixed unit modification of the present embodiment, by using the rivet portion Cr2 as the fixed unit, the concern (the influence of thermal stress) can be eliminated.

[0112] (Modification of the fixing unit of the present embodiment (Modification 3 of the elastic member))

[0113] use Fig. 9 (b) and (c) of the embodiment describe the pressure regulating valve 100g in the fixed unit modification (elastic component modification 3) of the present embodiment. In addition, the pressure regulating valve 100g in the fixed unit modification (elastic component modification 3) of the present embodiment is different from the pressure regulating valve 100f in the fixed unit modification of the present embodiment mainly in that the elastic component 70G is composed of a wire spring, but the other structures are substantially the same as those of the fixed unit modification of the present embodiment. The same symbols are given to the same structures, and repeated descriptions are omitted.

[0114] <About elastic components>

[0115] The inventors have focused on the above-mentioned modification of the fixing unit of the present embodiment (see Fig. 9 In (a)), the elastic member 70 is clamped between the valve core 20F and the guide member 60 by using the fixing unit formed by the rivet portion Cr2, and on this basis, a structure in which the elastic member can generate a greater force is studied. As a result, in the fixing unit modification example (elastic member modification example 3) of the present embodiment, as shown in FIG. Fig. 9 As shown in (c), a wire spring is used as the elastic member 70G.

[0116] Specifically, the elastic member 70G is composed of a continuous wire spring made of a metal such as stainless steel or phosphor bronze. Fig. 9 As shown in (c), the elastic component 70G includes: a circular ring fixing portion 71G, which forms the other end side of the wire spring into a circular ring shape on the same axis as the axis L; a leg portion 72G, which is continuously connected to the circular ring fixing portion 71G and extends to one end side in the direction of the axis L; and a bent portion 73G, which is formed at one end of the leg portion 72G and has a convex shape relative to the inner circumferential surface 12b of the valve seat portion 12.

[0117] <About fixed unit>

[0118] like Fig. 9As shown in (b), the fixing means of the valve body 20G, the guide member 60 and the elastic member 70G adopts the caulking portion Cr3 formed by caulking.

[0119] Specifically, the annular fixing portion 71G of the elastic member 70G is accommodated in the annular receiving groove 26G formed between the valve portion 21 and the recess 23G on one end surface of the valve core 20G. Moreover, while the boss portion 22G is engaged with the opening portion 61a of the guide member 60, the annular fixing portion 61 of the guide member 60 is accommodated in the recess 23G. After that, by riveting the boss portion 22G, the valve core 20G, the guide member 60 and the elastic member 70G are mutually joined in a concentric circle shape relative to the axis L via the riveting portion Cr3 as a fixing unit. In addition, the outer diameter of the annular fixing portion 61 of the guide member 60 is set to be larger than the outer diameter of the annular fixing portion 71G. Thus, the entire circumference of the annular fixing portion 71G is clamped by the annular fixing portion 61 of the guide member 60. In addition, when viewed from the direction of the axis L, the leg portion 72G and one of the plurality of support portions 62 (the always-contacting portion 62a) are arranged at symmetrical positions across the axis L.

[0120] <Regarding the force of elastic components>

[0121] The annular fixing portion 71G of the elastic member 70G allows rotational movement in the cross section of the wire, that is, torsion is generated in the cross section of the wire, through the fixing unit formed by the riveting portion Cr3. As a result, when the curved portion 73G is brought into contact with the inner circumferential surface 12b of the valve seat portion 12, not only the bending of the leg portion 72G of the wire spring is applied, but also torsion is applied in the cross section of the wire of the annular fixing portion 71G continuous with the leg portion 72G, thereby generating a relatively large force. In addition, at this time, torsion is only generated in the cross section of the wire, so the relative circumferential positions of the leg portion 72G and the plurality of support portions 62 do not change.

[0122] In summary, the pressure regulating valve 100g in the fixed unit modification (elastic component modification 3) of the present embodiment has the same effect as the fixed unit modification of the present embodiment, that is, it can respectively eliminate the existing problem 1 (generating lateral vibration of the valve core), the existing problem 2 (high cost of the elastic component), the concern (increase in pressure loss) and the concern (influence of thermal stress). In addition, in the fixed unit modification (elastic component modification 3) of the present embodiment, by using a wire spring as the elastic component 70G, a relatively large force can be generated.

[0123] <Others>

[0124] The pressure regulating valves 100a to 100g of this embodiment can be applied to all fluid devices and fluid circuits. In addition, the present invention is not limited to the above-mentioned modes, embodiments, and modifications described herein, and appropriate changes and modifications can be made within the scope of the technical concept of the present invention.

Claims

1. A pressure regulating valve, characterized in that: have: a valve body having a valve seat; A valve core moves in the axial direction and is seated or unseated relative to the valve seat; A guide portion having a plurality of support portions extending in the axial direction and arranged on the same circumference when viewed from the axial direction, and fixed to the valve core, guiding the movement of the valve core in the axial direction by slidingly contacting the inner circumferential surface of the valve body; as well as an elastic member which is separate from the guide portion and fixed to the guide portion and applies force to the guide portion in a direction orthogonal to the axis, At least one of the plurality of support portions of the guide portion serves as a constant contact portion that is constantly in contact with the inner peripheral surface of the valve body by the urging force of the elastic member.

2. The pressure regulating valve according to claim 1, characterized in that: In the valve open state, the area occupied by the plurality of support portions of the guide portion in the flow path is made smaller than the area of ​​the flow path opening in the radial direction.

3. The pressure regulating valve according to claim 1 or 2, characterized in that: The elastic member has at least one leg portion made of an elastic body and arranged on the same circumference. When viewed in the axial direction, the leg portion exists only in a region excluding a boundary line on the opposite side of the constant contact portion across the axial line.

4. The pressure regulating valve according to claim 1, characterized in that: In the guide portion, the plurality of support portions are composed of three support portions arranged at equal intervals on the same circumference, and the constant contact portion is composed of one support portion.

5. The pressure regulating valve according to claim 1, characterized in that: The valve core and the guide portion are separate bodies and are fixed to each other in a concentric circle shape relative to the axis.

Images