Pressure adjusting valve

Abstract

The present invention provides a pressure adjustment valve capable of smoothly performing an attachment operation and a removal operation with respect to a fluid path. A pressure adjustment valve (100a) inserted into a fluid path is provided with: a valve body (10) having a bottomed cylindrical shape and provided with a valve seat (12a); and a valve body (20) that moves in the direction of the axis (L) and is seated or unseated with respect to the valve seat (12a), the valve body (10) being a member integrally provided with an extraction-direction biasing member (80), and the valve body (10) being inserted into the fluid path by means of a fixing member (C) that comes into contact with one end of the valve body (10). The extraction direction urging member (80) has an urging force that urges the valve body (10) in the extraction direction of the fluid path. As a result, it is possible to smoothly perform the work of attaching and removing the pressure adjustment valve (100a) to and from the fluid path.

Description

Technical Field

[0001] The present invention relates to a pressure regulating valve provided with a taking-out direction urging member. Background Art

[0002] The pressure regulating valve is preferably installed in a fluid path formed in a piping block in order to realize various piping paths depending on the user's application, especially to realize weight reduction and space saving.

[0003] Here, the following device is described in Patent Document 1: Fig.14 As shown, a one-way valve 1400 (hereinafter referred to as "existing pressure regulating valve") comprises a valve body 1410 having a valve seat 1412 and a valve core 1420 seated on or unseated relative to the valve seat 1412. The one-way valve 1400 is inserted into a storage space As formed in the vertical direction of the piping block B14, so that the primary side flow path Fp1 and the secondary side flow path Fp2 are fluidly connected.

[0004] Furthermore, Patent Document 1 states that, in order to mitigate the impact caused by the collision between the valve core 1420 and the valve seat 1412 and prevent the one-way valve 1400 from shaking in the storage space As, before the one-way valve 1400 is inserted into the storage space As, the wave washer 1480 is arranged on the inner side of the storage space As. Thus, in the installed state, the wave washer 1480 exerts a force on the one-way valve 1400 in the removal direction.

[0005] However, in Patent Document 1, as a force applying member for applying force in the removal direction, a corrugated washer 1480 which is separate from the check valve 1400 is used, and the corrugated washer 1480 is arranged on the bottom surface of the storage space As by utilizing the drop caused by its own weight in the vertical direction (see, in particular, paragraphs

[0025] ,

[0028] to

[0032] , and Figure 1 ), so there are mainly four problems as follows.

[0006] As a first problem, in the existing pressure regulating valve, at the installation site, an appropriate corrugated gasket 1480 is selected and placed in the storage space As, but there is a concern that an incorrect corrugated gasket 1480 (for example, a corrugated gasket having a smaller spring coefficient than the desired one) may be used due to human error (hereinafter referred to as "existing problem point 1 (using an incorrect force-applying component at the installation site)").

[0007] As a second problem, in the existing pressure regulating valve, the wave washer 1480 is installed on the bottom surface of the storage space As by falling in the vertical direction, that is, it is assumed that the storage space As is opened upward in the vertical direction. Therefore, in the case where the storage space As is opened laterally in the horizontal direction or opened downward in the vertical direction, there are cases where this cannot be adopted (hereinafter referred to as "existing problem 2 (constraints in the installation direction)").

[0008] As a third problem, in the existing pressure regulating valve, it is necessary to remove it from the storage space As during maintenance. Here, since the axial length of the adopted wave washer 1480 is small, the force in the removal direction is also small. Therefore, if a foreign object or the like is bitten between the outer peripheral surface of the valve body 1410 and the inner peripheral surface of the storage space As, there is a concern that it is difficult to remove the existing pressure regulating valve using only the force of the wave washer 1480 (hereinafter referred to as "existing problem point 3 (difficult to remove with a small force)").

[0009] In addition, as a countermeasure to the third problem, it is also considered to use a force-applying member such as a coil spring, which has a larger axial length and a larger force in the removal direction, instead of the wave washer 1480. However, the larger the axial length of the force-applying member is, the easier it is to be configured in a state of bending or tilting relative to the axial direction. Under such circumstances, when the existing pressure regulating valve is removed from the storage space As, the force acts in a direction inclined relative to the axial direction, so that the outer peripheral surface of the valve body 1410 and the inner wall of the storage space As are stuck, and there is a concern that removal becomes more difficult (hereinafter referred to as "existing problem point 4 (difficult to remove due to the inclined force)").

[0010] Prior art literature

[0011] Patent Literature

[0012] Patent Document 1: Japanese Patent Application Publication No. 2012-184820 Summary of the invention

[0013] Problems to be solved by the invention

[0014] An object of the present invention is to provide a pressure regulating valve that can smoothly perform installation and removal operations with respect to a fluid path.

[0015] Solutions to Solve Problems

[0016] In order to solve the above-mentioned problems, a pressure regulating valve is provided, which is a pressure regulating valve inserted in a fluid path and comprises: a valve body, which has a bottomed cylindrical shape and is provided with a valve seat; and a valve core, which moves along the axial direction to be seated or unseated relative to the above-mentioned valve seat, and the above-mentioned valve body is a component in which a removal direction force applying component is integrally provided. When the above-mentioned valve body is inserted into the above-mentioned fluid path and is in an installed state using a fixing component abutting against one end portion of the above-mentioned valve body, the above-mentioned removal direction force applying component has a force that applies force to the above-mentioned valve body in the removal direction of the above-mentioned fluid path.

[0017] Furthermore, the pressure regulating valve may be configured such that the biasing force of the removal direction biasing member is set larger than a force applied to the valve body by fluid pressure so that the valve body does not move in the mounting direction due to the fluid pressure in the mounted state.

[0018] Furthermore, the pressure regulating valve may be configured such that the valve body includes a stopper, and in the mounted state, the stopper abuts against the fluid path to limit the amount of deformation of the removal direction urging member.

[0019] Furthermore, the pressure regulating valve may also be configured such that, in the installation state, a sealing component is clamped between the outer peripheral surface of the valve body and the inner peripheral surface of the fluid path, and the deformation amount of the removal direction force application member is set to be larger than the distance that the sealing component moves in the axial direction in a compressed state when the valve body is inserted into the fluid path.

[0020] Furthermore, the pressure regulating valve may also be constructed to include a pressure-sensing bellows unit for applying force to the valve core toward the valve seat, wherein the pressure-sensing bellows unit is provided with a boss portion protruding toward the other end side, and the boss portion has a rivet portion that is respectively engaged and fixed with an opening portion provided at the bottom of the valve body and an opening portion provided at the removal direction force-applying member.

[0021] Furthermore, the pressure regulating valve may be configured such that the valve body includes a body and a valve seat portion having the valve seat, and the pressure regulating valve further includes a position adjusting portion capable of changing the relative positions of the body and the valve seat portion in the axial direction, wherein the position adjusting portion defines the total length of the valve body in the axial direction.

[0022] Furthermore, the pressure regulating valve may be configured such that the removal direction force applying member comprises: a fixing portion which is directly or indirectly fixed to the bottom of the valve body; a contact portion which contacts the fluid path in the installed state; and a connecting portion which connects the fixing portion with the contact portion.

[0023] Furthermore, the pressure regulating valve may be configured such that the valve body has a bottomed cylindrical shape opened at one end, and in order to equalize the pressure of the storage space divided between the other end of the valve body and the fluid path, a pressure equalizing path extending along the axial direction is provided in the valve body.

[0024] Furthermore, the pressure regulating valve may be configured such that a mutually fixed joint portion is formed on each end side of the main body and the valve seat portion, one end portion of the valve seat portion has a pushing portion pushed by the fixing member, and the joint portion is formed on the other end side of the pushing portion.

[0025] Furthermore, the pressure regulating valve and the fixing member having a shape corresponding to the opening of the fluid path may be inserted into the fluid path to connect the pressure regulating valve to the fluid path.

[0026] The effects of the invention are as follows.

[0027] According to the present invention, it is possible to provide a pressure regulating valve that can smoothly perform installation and removal operations with respect to a fluid path. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The diagrams are explanatory diagrams showing a pressure regulating valve according to a first embodiment of the present invention, wherein (a) is a longitudinal sectional view of the pressure regulating valve, (b) is a longitudinal sectional view of a biasing member used in (a), and (c) is a top view of the biasing member shown in (b).

[0029] Figure 2 These are illustrations of the force-applying component in modified examples 1 to 3 of the force-applying component of the first embodiment, (a) and (b) respectively represent a longitudinal sectional view and a top view of modified example 1 of the force-applying component of the first embodiment, (c) and (d) respectively represent a longitudinal sectional view and a top view of modified example 2 of the force-applying component of the first embodiment, and (e) and (f) respectively represent a longitudinal sectional view and a top view of modified example 3 of the force-applying component of the first embodiment.

[0030] Figure 3 It is shown Figure 1 This is a cross-sectional view showing the installation and removal of the pressure regulating valve to a piping block.

[0031] Figure 4 It is shown Figure 3 The pressure regulating valve shown is a cross-sectional view of a state in which it is mounted on a piping block, wherein (a) is an overall view and (b) is an enlarged view of a region surrounded by a dotted line IVb shown in (a).

[0032] Figure 5 is an explanatory diagram of a modified example of the pressure equalizing path of the first embodiment, and is composed of Figure 4 An enlarged view of the area enclosed by the dashed line V is shown.

[0033] Figure 6 is an explanatory diagram of a modified example of the position adjustment joint portion of the first embodiment, and is composed of Figure 4 An enlarged view of the area enclosed by dashed line VI is shown.

[0034] Figure 7 1 is an explanatory diagram of a modified example of the sealing member of the first embodiment, (a) is an overall view (with Figure 4 (a) corresponds to the figure), (b) shows an enlarged view of the area surrounded by the dotted line VIIb shown in (a) (corresponding to the figure) Figure 4 (b) corresponds to).

[0035] Figure 8 is an explanatory diagram of a modification example 1 of the stopper of the first embodiment (with Figure 4 (a) corresponds to).

[0036] Fig. 9 is an explanatory diagram of a second modification of the stopper of the first embodiment, (a) showing Figure 8 1 and 2. An enlarged view of a region surrounded by a dotted line IXa is shown, and (b) and (c) are respectively a longitudinal sectional view and a plan view of the stopper member used in (a).

[0037] Fig.10 is an explanatory diagram of a modification example 3 of the stopper of the first embodiment, and is composed of Figure 8 An enlarged view of the area enclosed by the dashed line X is shown.

[0038] Fig.11 is an explanatory diagram showing a pressure regulating valve according to a second embodiment of the present invention (with Figure 4 (a) corresponds to).

[0039] Fig.12 are explanatory diagrams showing a pressure regulating valve according to a third embodiment of the present invention, wherein (a) is an overall view (with Figure 4 (a) corresponds to the figure), (b) and (c) respectively represent the longitudinal section and top view of the limiting component used in (a), and (d) and (e) respectively represent the longitudinal section and top view of the force-applying component used in (a).

[0040] Fig.13 1 and 10 are explanatory diagrams of a modified example of the force applying unit according to the third embodiment, wherein (a) is an overall view (with Figure 4 (a) corresponds to the figure), (b) and (c) respectively represent a longitudinal sectional view and a top view of the limiting component used in (a).

[0041] Fig.14 is a cross-sectional view showing a conventional pressure regulating valve.

[0042] Explanation of symbols

[0043] 100a~100j—pressure regulating valve, 1A—primary port, 1B—secondary port, 10, 10B, 10C, 10D, 10F, 10G, 10H, 10I, 10J—valve body, 11, 11B, 11C, 11D, 11H, 11I, 11J—body (valve body), 11a—horizontal hole, 11d, 11Cd, 11Dd—open end, 11ep—pressure equalizing path, 11IS1—first small diameter portion, 11IS2—second small diameter portion, 11L, 11IL, 11JL—large diameter portion, 11Jr—body annular groove, 11n—narrowed neck portion, 11o—opening portion, 11S, 11JS—small diameter portion, 11st—limiting portion, 11u—bottom portion, 12, 12C, 12 D, 12H—valve seat portion (valve body), 12a—valve seat, 12b—inner circumferential surface, 12c—a pair of rotating tool insertion portions, 12d, 12Cd, 12Dd, 12Hd—open end (pushing portion), 12De—annular sealing groove of the valve seat portion, 12Df—flange portion, 12HTh—side threaded portion of the valve seat portion, 14F, 14G, 14H, 14I, 14J—limiting component (limiting portion, valve body), 14Fa, 14Ja—opening portion, 14Fb, 14Gb, 14Jb—fixing portion, 14Fc, 14Gc, 14Hc, 14Ic, 14Jc—abutting portion, 14Fs, 14Is, 14Js—spoke portion, 14Ge, 14He—side wall portion, 14Gf, 14Hf—open Mouth, 14Gg, 14Hg—drawing part, 14Hth—limiting part side threaded part, 14Ic—contact part, 14Io, 14Jo—fan-shaped gap, 14Ip—convex part, 14Ir—concave part, 20—valve core, 21—valve part, 22—boss part, 30—sliding unit, 31—cylinder part, 32—connecting part, 33—piston part, 40—adjustment spring unit, 41—valve spring, 42—adjustment threaded part (position adjustment part), 42a, 42Ha—main body side adjustment threaded part, 42b, 42Hb—valve seat side adjustment threaded part, 42H—first adjustment threaded part (position adjustment part), 50—pressure-sensing bellows unit, 51, 51I—pressure-sensing bellows, 52, 52F, 52J—fixed Accessories, 52a, 52Fa, 52Ha, 52Ja—boss portion, 70—sliding contact component, 71—circular fixing portion, 72—leg portion, 73—bending portion, 80, 80E, 80Gb, 80Hb, 80I, 80Jb, 81, 82, 83—force-applying component (force-applying member in the removal direction), 80a, 81a, 82a, 83a—opening portion, 80b, 80Ib, 81b, 82b, 83b—fixing portion, 80c, 80Ic, 81c, 82c, 83c—contact portion, 80d, 80Id, 81d, 82d, 83d—connecting portion, 80G, 80H, 80J—force-applying unit (force-applying member in the removal direction), 80Ga, 80Ha, 80Ja—contact component,80Gac, 80Hac—abutment portion, 80Gae, 80Hae—spring support portion, 80Hat—through hole, 80Jc—retaining ring, A—storage chamber, As—storage space (fluid path), B, Bd, Be, Bg, Bh, Bi, Bj—piping block, Bs—one end surface, C, C'—connector (fixing member), Cc—abutment surface, Cf—flange, Cg—connector annular sealing groove, Cgb—boss storage groove, Ch—mounting hole, Ci—insertion portion, D, D'—maximum diameter of the valve body, Ep—pressure equalization path, FB, FB'—force of the force-applying member, FD, FD'—force received by the valve body from the fluid pressure, Fp1—primary side flow path, Fp2— Secondary side flow path, G1—first receiving groove (opening), G2—second receiving groove, Ga—annular groove, Gb—bottom surface, Gp—gap, Gs—annular sealing groove, L—axis line, L1, L1'—deformation of the force-applying component, L2, L2'—sliding distance of the sealing component, La—total length of the valve body in the axial direction, Or1—first O-ring (sealing component), Or2—second O-ring, P1—primary side pressure, P2—secondary side pressure, Ri—rivet portion, Sh—threaded hole, St—annular step portion, St1—first annular step portion, St2—second annular step portion, Sw—fastening screw, Th—second adjustment screw portion, W, WC, WD—welding portion (joining portion). , DETAILED DESCRIPTION

[0044] Reference Figures 1 to 13 , the embodiments of the present invention are described in detail. However, the present invention is not limited to the forms of the embodiments.

[0045] <About Terminology>

[0046] In the description of this specification and claims, "left", "right", "upper", and "lower" indicate Figure 1 (a), (b), Figure 2 (a), (c), (e), Figures 3 to 8 , Fig. 9 (a), (b), Figure 10 to Figure 11 , Fig.12 (a), (b), (d), Fig.13In the description of (a) and (b) of the present specification and claims, "one end" and "the other end" indicate the "lower end" and "upper end" in the drawings. In the description of the present specification and claims, "the effective pressure-bearing area of ​​the pressure-sensing bellows" indicates 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 "mountain" part of the corrugation shape protruding in the direction of the central axis away from the central axis side of the pressure-sensing bellows). In the description of the present specification and claims, "position adjustment part" indicates "a structure capable of changing the relative position of the main body and the valve seat part in the axial direction". In the description of the present specification and claims, "installation direction" and "removal direction" indicate "the movement direction of the pressure regulating valve when installed and removed relative to the fluid path". In the description of the present specification and claims, "removal direction urging member" means "a member having a force to urge the valve body in the removal direction of the fluid path when the valve body is installed in the fluid path (for example, a urging member (a single-leg leaf spring, a two-leg leaf spring, a three-leg leaf spring, a four-leg leaf spring), a urging unit (a coil spring that urges via an abutment member), etc.)". In the description of the present specification and claims, "sliding distance of the sealing member" means "a distance that the sealing member moves in a compressed state when the valve body is inserted into the fluid path". In the description of the present specification and claims, "the force received by the valve body from the fluid pressure" means "the product of the pressure difference received by one end side and the other end side of the valve body in the closed valve state and the cross-sectional area of ​​the valve body". In the description of the present specification and claims, "fixing member" means "a member that holds the valve body in the axial direction in the fluid path (for example, a connector having a shape corresponding to the opening of the fluid path, a C-shaped ring that generates elastic force in the radial direction provided in the inner peripheral groove of the fluid path, etc.)". In the description of this specification and claims, a “connection structure” means a “structure for connecting a pressure regulating valve to a fluid path.” In the description of this specification and claims, a “pressure regulating valve unit” means a “unit composed of a pressure regulating valve and a fixing member.”

[0047] (First Embodiment)

[0048] <About the structure of the pressure regulating valve>

[0049] use Figure 1The pressure regulating valve 100a of the first 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 sliding contact component 70, and a force-applying component 80 (a force-applying member in the removal direction). The following describes the various structures of the pressure regulating valve 100a in sequence. In addition, a high-pressure primary-side pressure P1 is introduced into the primary-side port 1A, and on the other hand, a low-pressure secondary-side pressure P2 is introduced into the secondary-side port 1B.

[0050] Here, in the pressure regulating valve 100a of the first embodiment, the desired force applying member 80 is provided integrally with the valve body 10 before shipment, and when the valve body 10 is installed in the fluid path, the desired force applying member 80 has a force for applying the valve body 10 in the removal direction of the fluid path, which will be described in detail below. As a result, the pressure regulating valve 100a of the first embodiment eliminates all of the existing problems 1 (using an incorrect force applying member at the installation site), 2 (constraints in the installation direction), 3 (difficult to remove with a small force), and 4 (difficult to remove due to the inclined force), and can smoothly perform the installation and removal operations of the pressure regulating valve 100a relative to the fluid path.

[0051] The valve body 10 is made of metal such as stainless steel or aluminum, and includes a body 11 having a bottomed cylindrical shape and a valve seat portion 12 which is separate from the body 11 and has a substantially cylindrical shape.

[0052] The main body 11 defines a storage chamber A, and has a plurality of (e.g., four) horizontal holes 11a arranged evenly in the circumferential direction and defining the secondary port 1B in the side wall when viewed from the axis L. In addition, an opening 11o coaxial with the axis L is formed in the bottom 11u of the main body 11.

[0053] The valve seat portion 12 includes an annular valve seat 12a, an inner peripheral surface 12b defining the primary port 1A, a pair of rotating tool insertion portions 12c formed on one end surface and arranged symmetrically with respect to the axis L, and an open end 12d provided on one end side.

[0054] The valve element 20 is made of metal such as stainless steel or phosphor bronze and has a substantially disk shape. The valve element 20 includes an annular valve portion 21 and a boss portion 22 protruding on the same axis as the axis L toward one end.

[0055] The valve portion 21 has an outer diameter larger than that of the valve seat 12 a and is seated on or separated from the valve seat 12 a by moving in the direction of the axis L. The boss portion 22 is fitted in the opening of the sliding contact member 70 .

[0056] 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 the fixing fitting 52 at the other end by the force of the valve spring 41, and a piston member 33 whose other end is fixed by riveting to the connecting member 32 and whose one end is supported by the cylinder member 31 so as to be able to move forward and backward, and is provided inside the pressure-sensing bellows 51. Here, 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, thereby applying force to the pressure-sensing bellows 51 in the extension direction along the axis L.

[0057] The adjustment spring unit 40 includes a valve spring 41 as a compression spring and an adjustment thread portion 42 (position adjustment portion) capable of changing the relative position of the body 11 and the valve seat portion 12 in the direction of the axis L. The adjustment thread portion 42 is used to adjust the force acting on the valve element 20 by expanding and contracting the valve spring 41 and the pressure-sensing bellows 51 .

[0058] The adjustment threaded portion 42 is composed of a main body side adjustment threaded portion 42a formed on the inner circumference of one end side of the main body 11 and a valve seat side adjustment threaded portion 42b formed on the outer circumference of the other end side of the valve seat portion 12, and they are threadedly connected to each other. Here, for the position adjustment operation of the valve seat portion 12 relative to the valve core 20, before shipment, an adjustment jig (not shown) is engaged with a pair of rotating tool insertion portions 12c, and the valve seat portion 12 is rotated relative to the main body 11 via the adjustment threaded portion 42, so as to move in the direction of the axis L. In this way, the expansion and contraction of the valve spring 41 and the pressure-sensing bellows 51, that is, the force acting on the valve core 20 can be set to open the valve at a desired valve opening pressure setting value. In addition, after adjusting the force acting on the valve core 20 by the position adjustment operation, in a state where the valve core 20 acts on the valve seat portion 12, a welding portion W is provided to continuously fix the open end 12d of the valve seat portion 12 and the open end 11d of the main body 11 to each other in the circumferential direction by welding or the like. Therefore, before shipment, the adjustment thread portion 42 (position adjustment portion) defines the total length La of the valve body 10 in the direction of the axis L (see Figure 4 (a)).

[0059] The pressure sensing bellows unit 50 is made of metal such as stainless steel or phosphor bronze and is formed by press forming to include a pressure sensing bellows 51 formed into a bellows shape extending in the axis L direction and a fixing bracket 52 having a substantially disk shape.

[0060] 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 fitting 52 , and the interior is sealed.

[0061] Here, 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) is not limited to the approximate value calculated based on the average inner diameter of the minimum inner diameter and the maximum inner diameter of the corrugated shape, and the dimensions of each part of the pressure regulating valve 100a can be set using the actual pressure-receiving area obtained through experiments.

[0062] The fixing fitting 52 has a boss portion 52a that protrudes toward the other end side on the same axis as the axis L. The fixing fitting 52 is fitted and fixed to the main body 11 and the urging member 80 via a caulking portion Ri of the boss portion 52a.

[0063] The sliding contact member 70 is formed by stamping a thin and elastic member made of a metal such as stainless steel or phosphor bronze. The sliding contact member 70 includes a circular ring fixing portion 71 having an opening on the same axis as the axis L, a plurality of leg portions 72 connected to the outer circumference of the circular ring fixing portion 71, extending toward one end in the direction of the axis L and arranged on the same circumference when viewed from the direction of the axis L (eight legs 72 are arranged at equal intervals on the same circumference in the example), and a curved portion 73 formed between one end and the other end of the leg portion 72 and having a convex shape protruding relative to the inner circumferential surface 12b of the valve seat portion 12. After the boss portion 22 is fitted into the opening of the sliding contact member 70, the sliding contact member 70 is joined to the valve core 20 via a welded portion (not shown) formed by spot welding or the like. Furthermore, since the curved portion 73 has a convex shape protruding relative to the inner peripheral surface 12 b of the valve seat portion 12 , the curved portion 73 is in sliding contact with the inner peripheral surface 12 b of the valve seat portion 12 in a substantially point-contact manner.

[0064] <About force-applying components>

[0065] The force applying member 80 is composed of a two-leg leaf spring, for example, a metal such as stainless steel or phosphor bronze is used as a material, and a thin-walled and elastic member is formed by stamping. In addition, the force applying member 80 has: when viewed from the axis L direction (refer to Figure 1 (c)) a fixing portion 80b having a substantially rectangular shape and having an opening 80a on the same axis as the axis L; a pair of abutment portions 80c having a substantially rectangular shape and arranged symmetrically with respect to the axis L; and when viewed from a direction orthogonal to the direction of the axis L (refer to Figure 1(b)) A pair of connecting parts 80d extending in a direction having an angle with respect to the axis L direction and connecting the outer side of the fixing part 80b and the inner side of the abutting part 80c. Here, the boss part 52a of the fixing fitting 52 is respectively fitted with the opening part 11o provided in the bottom part 11u of the main body 11 and the opening part 80a provided in the urging member 80, and then is fixed to each other via the rivet part Ri. Thus, the urging member 80 can be provided integrally with the valve body 10 without adding any additional parts.

[0066] Thus, in the pressure regulating valve 100a of the first embodiment, the desired urging member 80 is provided integrally with the valve body 10 before shipment, thereby eliminating the conventional problem 1 (using an incorrect urging member at the installation site) and the conventional problem 2 (restrictions on the installation direction). Furthermore, by forming the urging member 80 with a two-legged leaf spring, it can be manufactured at a low cost.

[0067] As described above, before shipment, the total length La of the valve body 10 is determined by the adjustment thread portion 42 (see Figure 4 (a)), even if the plurality of pressure regulating valves 100a are set to the same valve opening pressure setting value, there are individual differences in the total length La. In contrast, in the pressure regulating valve 100a of the first embodiment, before shipment, the force applying member 80 capable of generating an appropriate force is selected based on the total length La of the valve body 10 that has individual differences, and can be provided integrally with the valve body 10, so that the removal operation relative to the fluid path can be particularly smoothly performed.

[0068] <Changes to the force-applying parts>

[0069] Here, in the pressure regulating valve 100a of the first embodiment, the force applying component 80 as the removal direction force applying component adopts a component composed of a two-legged leaf spring, but it is not limited to this. As defined in the above-mentioned <About Terms>, the "removal direction force applying component" is "a component that has a force that applies the valve body in the removal direction of the fluid path when the valve body is installed in the fluid path". Therefore, the force applying component can be any structure as long as it has a force that applies the valve body in the removal direction of the fluid path. Here, as modified examples 1 to 3 of the force applying component of the first embodiment, the structure using a three-legged leaf spring, a four-legged leaf spring, and a single-legged leaf spring is specifically described.

[0070] <Modification 1 of the urging member and Modification 2 of the urging member of the first embodiment>

[0071] like Figure 2 (a) to Figure 2As shown in (d), the urging members 81 and 82 are composed of a three-legged leaf spring and a four-legged leaf spring. Specifically, the urging members 81 and 82 have: when viewed from the axis L direction (refer to Figure 2 (b) Figure 2 (d)) having a circular shape and having a fixing portion 81b, 82b with openings 81a, 82a on the same axis as the axis L; having three or four abutment portions 81c, 82c having a substantially rectangular shape and being evenly arranged in the circumferential direction; and when viewed from a direction orthogonal to the direction of the axis L (refer to Figure 2 (a) Figure 2 (c)) three or four connecting parts 81d, 82d extending in a direction having an angle with respect to the axis L direction and connecting the outer side of the fixing part 81b, 82b with the inner side of the contact part 81c, 82c. As a result, in the force applying parts 81, 82, the number of the contact parts 81c, 82c evenly arranged in the circumferential direction is larger than that of the force applying part 80, so that a more stable force can be generated on the valve body 10 without bias in the circumferential direction. In addition, the force applying parts 81, 82 can be manufactured at a low cost.

[0072] <Modification 3 of the urging member of the first embodiment>

[0073] like Figure 2 (e) and Figure 2 As shown in (f), the urging member 83 is composed of a single-leg leaf spring and has: when viewed from the axis L direction (refer to Figure 2 (f)) has a substantially rectangular shape and has a fixing portion 83b having an opening 83a on the same axis as the axis L; when viewed from a direction orthogonal to the axis L (refer to Figure 2 (e)) has a convex abutment portion 83c toward one end; and a connecting portion 83d that connects the fixing portion 83b and the outer sides of the abutment portion 83c to each other with a curve. As a result, in the force-applying member 83, the deflection amount from the natural length state to the deformed state can be increased relatively easily compared to the force-applying member 80, that is, the force applied to the valve body 10 can be made larger. In addition, the force-applying member 83 can be manufactured at a low cost.

[0074] <About installation and removal of pressure regulating valve>

[0075] In the following, the pressure regulating valve 100a including the urging member 80 according to the first embodiment will be described. Figure 3 The shapes of the main body 11 , the piping block B, and the connector C are described.

[0076] The main body 11 is formed with a large diameter portion 11L and a small diameter portion 11S whose outer diameters gradually decrease from the open end 11d toward the bottom 11u along the axis L. A continuously connected constricted portion 11n is formed between the large diameter portion 11L and the small diameter portion 11S.

[0077] The piping block B has an insertion hole along the axis L direction, and a first receiving groove G1 (opening) and an annular groove Ga are formed on one end side of the insertion hole. The inner diameter of the first receiving groove G1 is set to be slightly larger than the outer diameter of the large diameter portion 11L of the main body 11. 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 second receiving groove G2 is formed in the insertion hole along the axis L direction, which is stepped from the annular groove Ga toward the other end side. The inner diameter of the second receiving groove G2 is set to be slightly larger than the outer diameter of the small diameter portion 11S of the main body 11, forming an equalizing pressure path Ep. In addition, an annular sealing groove Gs for accommodating a first O-ring Or1 (sealing component) is formed on the other end side of the first receiving groove G1. In addition, a threaded hole Sh is formed on one end surface Bs of the piping block B. In this way, a storage space As (fluid path) capable of accommodating the valve body 10 is formed in the piping block B along the axis L direction.

[0078] The connector C (fixing member) holds the valve body 10 in the direction of the axis L in the fluid path, has a shape corresponding to the opening of the fluid path, and is formed with a flange Cf extending radially outward from one end to the other end, an insertion portion Ci inserted into the insertion hole of the pipe block B, and a contact surface Cc located at the other end of the insertion portion Ci. The flange Cf is provided with a mounting hole Ch. A fastening screw Sw (see Figure 4 ), which will be described in detail below. In addition, a connector annular sealing groove Cg for accommodating a second O-ring Or2 is formed on the outer peripheral surface of the insertion portion Ci. Moreover, the connector C has a primary side flow path Fp1 along the same axis as the axis L. In addition, the connector C in the first embodiment has a shape corresponding to the opening of the fluid path, but is not limited to this. For example, if it is a C-shaped ring that is set in the inner peripheral groove of the fluid path and generates elastic force in the radial direction to hold the valve body 10 in the direction of the axis L in the fluid path, it can be any form.

[0079] <About installation and removal>

[0080] use Figure 3 and Figure 4 The installation and removal of the pressure regulating valve 100a to the piping block B will be described. Figure 3 The marked symbols correspond.

[0081] <About installation operation>

[0082] (1) Move the pressure regulating valve 100a toward the other end side in the direction of the axis L ( Figure 3 Then, the force member 80 moves toward the other end side in the direction of the axis L until the contact portion 80c of the force member 80 contacts the bottom surface Gb located at the other end side of the storage space As. At this time, the first O-ring Or1 disposed in the annular sealing groove Gs does not contact the large diameter portion 11L of the main body 11 and becomes uncompressed. Thus, the deformation amount L1 of the force member 80 can be set to be larger than the sealing member sliding distance L2 (refer to Figure 4 (a) and (b) of the present invention, which will be described in detail below.

[0083] (2) Move the connector C toward the other end in the direction of the axis L ( Figure 3 The connector C is moved upwards to be inserted into the first receiving groove G1 (opening) of the piping block B, and the contact surface Cc of the connector C is brought into contact with the open end 12d of the valve seat portion 12 which is one end of the valve body 10. Then, as shown in FIG. Figure 4 As shown, while the fastening screw Sw is threadedly engaged with the threaded hole Sh of the piping block B via the mounting hole Ch of the connector C, the connector C is moved toward the other end side in the direction of the axis L until the flange Cf of the connector C abuts against one end surface Bs of the piping block B. Thus, the pressure regulating valve 100a is inserted and installed in the storage space As (fluid path) of the piping block B.

[0084] At this time, the valve body 10 is pushed by the connector C while moving toward the other end side in the direction of the axis L. As a result, the connecting portion 80d of the force-applying member 80 is relatively bent toward one end side by a deformation amount L1 in the direction of the axis L (from 0.04 to 0.06). Figure 4 The deflection from the natural length state shown by the dotted line to the deformed state shown by the solid line). And, Figure 4 As shown in (b), the first O-ring Or1 slides and is clamped between the annular seal groove Gs and the large diameter portion 11L of the body 11 in a compressed state by a distance (hereinafter referred to as "seal member sliding distance") L2, thereby sealing the gap between the valve body 10 and the piping block B. Here, the deformation amount L1 of the urging member 80 is set to be larger than the seal member sliding distance L2 (L1>L2).

[0085] Moreover, if Figure 4As shown in (a), the force FB of the force applying member 80 is set to be greater than the force FD received by the valve body 10 from the fluid pressure in the installed state (FB>FD). In addition, the force FD received by the valve body 10 from the fluid pressure represents the product of the pressure difference received by one end side and the other end side of the valve body 10 in the closed valve state of the pressure regulating valve 100a and the cross-sectional area of ​​the valve body 10 ((P1-P2)×(D / 2) 2 ×π, P1: primary side pressure, P2: secondary side pressure, D: maximum diameter of the valve body 10). Here, in the gap between the small diameter portion 11S of the main body 11 and the second receiving groove G2, there is formed an equalizing pressure path Ep which makes the receiving space As divided on the other end side of the valve body 10 always fluidically connected with the secondary side flow path Fp2. Therefore, in the closed valve state, the secondary side pressure P2 is introduced to the other end side of the valve body 10. In addition, one end side of the valve body 10, that is, the open end 12d of the valve seat portion 12 is in abutment with the abutment surface Cc of the connector C, but from a microscopic point of view, the fluid invades. Therefore, in the closed valve state, the primary side pressure P1 is introduced to one end side of the valve body 10. Therefore, in the installed state, the force FB of the force-applying component 80 is always greater than the force FD received from the fluid pressure, so the abutment state of the valve body 10 and the connector can be maintained at all times. As a result, it is possible to reliably prevent the valve body 10 from being moved in the installation direction ( Figure 4 The connection portion 80d of the urging member 80 is damaged due to excessive deformation due to the movement of the urging member 80 in the upward direction (a).

[0086] <About the removal operation>

[0087] (3) Remove from the threaded hole Sh of the piping block B. Figure 4 The fastening screw Sw shown in the figure makes the connector C move toward one end side ( Figure 3 Move below.

[0088] (4) Simultaneously with the action of (3), the valve body 10 is automatically moved toward one end side in the direction of the axis L by the biasing force FB in the removal direction of the biasing member 80 ( Figure 3 Here, as described above, the deformation amount L1 of the force-applying member 80 is set to be larger than the sealing member sliding distance L2 (L1>L2). Therefore, the valve body 10 moves a distance corresponding to the deformation amount L1 of the force-applying member 80 by utilizing the restoring force of the force-applying member 80 from the deformed state to the natural length state. Thus, during the removal operation, the valve body 10 moves a distance corresponding to the deformation amount L1 of the force-applying member 80 that is larger than the sealing member sliding distance L2, so that the valve body 10 can be reliably moved to a state where the sliding resistance of the first O-ring Or1 is not applied to the valve body 10.

[0089] Thus, in the pressure regulating valve 100a of the first embodiment, when the valve body 10 is installed in the fluid path, the desired force applying member 80 has a force to apply the valve body 10 in the removal direction of the fluid path, thereby eliminating the existing problem 3 (difficult to remove with a small force) and the existing problem 4 (difficult to remove due to the inclined force). Therefore, in the first embodiment, the pressure regulating valve 100a can be smoothly installed and removed from the fluid path.

[0090] <About the operation of the pressure regulating valve>

[0091] Here, use Figure 4 The operation of the pressure regulating valve 100a will be described. Here, in the pressure regulating valve 100a, a high-pressure primary pressure P1 is introduced to the primary port 1A, and a low-pressure secondary pressure P2 is introduced to the secondary port 1B. Here, the plurality of curved portions 73 of the sliding contact member 70 are pressed by the elastic force of the plurality of leg portions 72 in the radial direction outward, and thus have sliding resistance with respect to the inner peripheral surface 12b of the valve seat portion 12.

[0092] First, if Figure 4 As shown in FIG. 1 , when the pressure at the primary port 1A rises in the closed state of the pressure regulating valve 100a, a valve opening force due to the pressure difference acts on the valve element 20. However, the valve element 20 does not leave the valve seat 12a until the valve opening force exceeds the combined force of the forces of the pressure sensing bellows 51 and the valve spring 41 and the sliding resistance of the curved portion 73 of the sliding contact member 70.

[0093] Next, when the pressure regulating valve 100a is in the open state (not shown), if the pressure at the primary port 1A further rises, the valve opening force acting on the valve core 20 becomes greater than the combined force of the force of the pressure sensing bellows 51 and the valve spring 41 and the sliding resistance of the curved portion 73 of the sliding contact member 70, 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 (refer to Figure 4 The flow is shown by the dotted line in (a).

[0094] 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 pressure sensing bellows 51 and the valve spring 41 and the sliding resistance of the curved portion 73 of the sliding contact member 70 , and the valve element 20 is seated on the valve seat 12 a again.

[0095] As described above, in the pressure regulating valve 100a of the first embodiment, the desired urging member 80 is provided integrally with the valve body 10 before shipment, thereby eliminating the existing problem 1 (using the wrong urging member at the installation site) and the existing problem 2 (there is a restriction in the installation direction). In addition, in the pressure regulating valve 100a of the first embodiment, when the valve body 10 is installed in the fluid path, the desired urging member 80 has a force that urges the valve body 10 in the removal direction of the fluid path, thereby eliminating the existing problem 3 (difficult to remove with a small force) and the existing problem 4 (difficult to remove due to the inclined force). Therefore, in the first embodiment, the installation and removal of the pressure regulating valve 100a with respect to the fluid path can be smoothly performed. In addition, the force FB of the urging member 80 is set to be larger than the force FD received by the valve body 10 from the fluid pressure (FB>FD), so that the urging member 80 can be reliably prevented from being damaged due to excessive deformation. In addition, by setting the deformation amount L1 of the urging member 80 to be larger than the sealing member sliding distance L2 (L1>L2), the valve body 10 can be reliably moved to a state where the sliding resistance of the first O-ring Or1 is not applied to the valve body 10 during the removal operation.

[0096] In addition, in the first embodiment, the structure in which the storage space As is opened at the bottom in the vertical direction is used for explanation, but the present invention is not limited thereto. For example, the storage space As may be opened at the side in the horizontal direction or at the top in the vertical direction. Here, when the storage space As is opened at the top in the vertical direction, the force applying member 80 generates an appropriate force by adding the increase in the deadweight of the pressure regulating valve 100a, thereby enabling a smooth removal operation.

[0097] (Modification of the pressure equalizing path of the first embodiment)

[0098] use Figure 5 The pressure regulating valve 100b in the modified example of the pressure equalizing path of the first embodiment is described. The pressure regulating valve 100b in the modified example of the pressure equalizing path of the first embodiment is different from the pressure regulating valve 100a of the first embodiment in that a pressure equalizing path 11ep is formed at the bottom 11u of the main body 11B, but the other structures are the same as those of the first embodiment. Here, the same symbols are attached to the same structures, and repeated descriptions are omitted.

[0099] <Concerns (difficulty in installation and removal due to narrow pressure equalization path)>

[0100] Here, use Figure 3Hereinafter, a description will be given of concerns that may arise when the pressure regulating valve 100 a according to the first embodiment includes the equalizing pressure passage Ep having a relatively narrow flow passage area.

[0101] A pressure equalizing path Ep is formed in the gap between the small diameter portion 11S of the main body 11 and the second storage groove G2, and the pressure equalizing path Ep always connects the storage space As divided between the other end side of the valve main body 10 and the fluid path with the secondary side flow path Fp2. When the flow path area of ​​the pressure equalizing path Ep is relatively narrow, positive pressure and negative pressure are generated in the storage space As during the installation and removal of the pressure regulating valve 100a relative to the piping block B, and the valve works like a so-called air suspension, so there is a concern that the installation and removal actions cannot be smoothly performed (hereinafter referred to as "concerns (difficult installation and removal actions due to the narrow pressure equalizing path)").

[0102] <About pressure equalization road>

[0103] In contrast, in the pressure regulating valve 100b in the modified example of the pressure equalizing path of the first embodiment, as shown in FIG. Figure 5 As shown, in order to make the storage space As divided between the other end side of the main body 11 and the fluid path equal in pressure, a pressure equalizing path 11ep as a through hole extending in the direction of the axis L is provided at the bottom 11u of the main body 11. The pressure equalizing path 11ep has a large flow path area due to the pressure equalizing path Ep formed in the gap between the small diameter portion 11S of the main body 11 and the second storage groove G2. As a result, during the installation and removal of the pressure regulating valve 100b relative to the piping block B, atmospheric pressure is always introduced into the storage space As via the pressure equalizing path 11ep, which can eliminate concerns (difficult installation and removal due to the narrow pressure equalizing path) and reliably and smoothly perform the installation and removal.

[0104] In addition, in the pressure regulating valve 100b in the modified example of the equalizing path of the first embodiment, the equalizing path 11ep for equalizing the pressure of the storage space As defined between the other end side of the main body 11 and the fluid path is described as a through hole provided at the bottom 11u of the main body 11B, but the invention is not limited thereto. For example, the equalizing path for equalizing the pressure of the storage space As may be described as follows: Figure 5 As shown, a recessed portion extending in the direction of the axis L is provided on the outer peripheral surface of the small diameter portion 11S facing the second housing groove G2 to increase the flow path area of ​​the pressure equalizing path Ep.

[0105] As described above, in the pressure regulating valve 100b in the modified example of the equalizing pressure path of the first embodiment, the existing problem 1 (using the wrong force-applying member at the installation site) to the existing problem 4 (difficult to remove due to the inclined force) can be eliminated in the same manner as in the first embodiment. In addition, in the pressure regulating valve 100b in the modified example of the equalizing pressure path of the first embodiment, by setting the force of the force-applying member 80 to be greater than the force received by the valve body 10B from the fluid pressure and setting the deformation of the force-applying member 80 to be greater than the sliding distance of the sealing member, the damage of the force-applying member 80 can be reliably prevented and the valve body 10B can be reliably moved to a position that is not affected by the first O-ring Or1 during the removal operation, as in the first embodiment. Moreover, in the pressure regulating valve 100b in the modified example of the pressure equalizing circuit of the first embodiment, during the installation and removal operations, atmospheric pressure is always introduced into the storage space As via the pressure equalizing circuit 11ep formed at the bottom 11u of the main body 11B, thereby eliminating concerns (difficulty in installation and removal due to the narrow pressure equalizing circuit) and allowing the installation and removal operations to be performed reliably and smoothly.

[0106] (Modification of the Position Adjustment Joining Section of the First Embodiment)

[0107] use Figure 6 The pressure regulating valve 100c in the modified example of the position adjustment joint of the first embodiment is described. In addition, the pressure regulating valve 100c in the modified example of the position adjustment joint of the first embodiment is different from the pressure regulating valve 100a in the first embodiment in that the welding portion WC (joining portion) formed between the valve seat portion 12C and the main body 11C is formed on the other end side of the open end 12Cd (pressing portion) of the valve seat portion 12C, but the other structures are the same as those of the first embodiment. Here, the same symbols are marked on the same structures, and repeated descriptions are omitted.

[0108] <Concerns (difficulty in removal due to tilt of the pressure regulating valve caused by the weld)>

[0109] Here, use Figure 4 Hereinafter, a description will be given of concerns that may arise when the pressure regulating valve 100 a according to the first embodiment is inclined with respect to the axis line L due to the welded portion W.

[0110] A welded portion W is formed continuously in the circumferential direction on one end side of the valve seat portion 12 and the main body 11 to fix the valve seat portion 12 and the main body 11 to each other. The welded portion W does not have the same height in the circumferential direction of the axis L, but has a non-uniform height in the circumferential direction of the axis L. Therefore, in the installation operation of the pressure regulating valve 100a with respect to the piping block B, the abutting surface Cc of the connector C abuts not against the open end 12d of the valve seat portion 12, but against the welded portion W having a non-uniform height in the circumferential direction of the axis L, so that there is a concern that the valve main body 10 is installed in a state tilted relative to the axis L. As a result, there is a concern that the outer circumferential surface of the valve main body 10 and the first receiving groove G1 and the second receiving groove G2 are caught, so that the removal operation cannot be performed smoothly (hereinafter referred to as "concern (difficulty in removal operation due to tilt of the pressure regulating valve caused by the welded portion)").

[0111] <About the joint>

[0112] In contrast, in the pressure regulating valve 100c in the modified example of the position adjustment joint portion of the first embodiment, as shown in FIG. Figure 6 As shown, the welded portion WC (joined portion) formed between the open end 11Cd of the main body 11C and one end side of the valve seat portion 12C is formed on the other end side of the open end 12Cd (pressing portion) of the valve seat portion 12C pressed by the connector C (fixing member). As a result, in the mounting operation of the pressure regulating valve 100c to the piping block B, after the abutting surface Cc of the connector C reliably abuts against the open end 12Cd of the valve seat portion 12, the valve main body 10C is mounted along the axis L, thereby eliminating the worry (difficulty in removing the pressure regulating valve due to the inclination of the welded portion), and the mounting and removing operations can be performed reliably and smoothly.

[0113] As described above, in the pressure regulating valve 100c in the modified example of the position adjustment joint of the first embodiment, the existing problems 1 (using the wrong force member at the installation site) to the existing problems 4 (difficult to remove due to the force of the tilt) can be eliminated as in the first embodiment. In addition, in the pressure regulating valve 100c in the modified example of the position adjustment joint of the first embodiment, the force of the force member 80 is set to be greater than the force received by the valve body 10C from the fluid pressure and the deformation amount of the force member 80 is set to be greater than the sliding distance of the sealing member as in the first embodiment, so that the damage of the force member 80 can be reliably prevented and the valve body 10C can be reliably moved to a position where it will not be affected by the first O-ring Or1 during the removal operation. In addition, in the pressure regulating valve 100c in the modified example of the position adjustment joint of the first embodiment, the contact surface Cc of the connector C reliably contacts the open end 12Cd of the valve seat portion 12C, so that the concern (difficult to remove due to the tilt of the pressure regulating valve caused by the welded portion) can be eliminated, and the installation and removal operations can be reliably and smoothly performed.

[0114] (Modification of the sealing member of the first embodiment)

[0115] use Figure 7 , a pressure regulating valve 100d in a modified example of the sealing component of the first embodiment is described. In addition, the pressure regulating valve 100d in the modified example of the sealing component of the first embodiment is different from the pressure regulating valve 100a of the first embodiment in that the welding portion WD (joining portion) of the adjustment thread portion 42 is provided on the side surface and the valve seat portion 12D has a sealing component, but the other structures are substantially the same as those of the first embodiment. Here, the same symbols are given to the same structures, and repeated descriptions are omitted.

[0116] First, in the modified example of the sealing component of the first embodiment, the position of the welding portion WD (joining portion) of the adjustment threaded portion 42 is the radially outer side of the middle portion of the valve seat portion 12D and the open end 11Dd of the main body 11D. In addition, in the modified example of the sealing component of the first embodiment, the piping block Bd further adds a receiving groove with a larger inner diameter to one end side of the first receiving groove G1 in the piping block B of the first embodiment, and the first to third numbers of each receiving groove are re-marked in order from one end side to the other end side.

[0117] <Regarding the concerns (difficulty in removal due to tilt of the pressure regulating valve caused by the sealing member)>

[0118] Here, use Figure 3 Hereinafter, a description will be given of concerns that may arise when the sealing member in the pressure regulating valve 100 a according to the first embodiment is inclined with respect to the axis L direction.

[0119] The sealing of the gap between the pressure regulating valve 100a and the piping block B in the first embodiment is performed by clamping the first O-ring Or1 (sealing member) between the large diameter portion 11L of the main body 11 and the annular seal groove Gs when the pressure regulating valve 100a is mounted on the piping block B. At this time, first, the first O-ring Or1 needs to be accommodated in the annular seal groove Gs, and the pressure regulating valve 100a needs to be inserted into the biasing member 80 and the main body 11 by a long distance corresponding to the small diameter portion 11S inside the first O-ring Or1, and then the first O-ring Or1 needs to be clamped. Therefore, before the first O-ring Or1 is pressed by the large diameter portion 11L of the main body 11 to form a sealed state, there is a concern that the first O-ring Or1 may be disengaged from the annular seal groove Gs due to sliding with the biasing member 80, the small diameter portion 11S of the main body 11, etc., and the valve main body 10 may be mounted in a state in which it is tilted relative to the axis L. As a result, adhesion occurs between the outer peripheral surface of the valve body 10 and the first and second receiving grooves G1 and G2, causing concern that the removal operation may not be smooth (hereinafter referred to as "concern (difficulty in removal operation due to inclination of the pressure regulating valve caused by the sealing component)").

[0120] <About sealing parts>

[0121] On the other hand, in the pressure regulating valve 100d in the modified example of the sealing member of the first embodiment, as shown in FIG. Figure 7 As shown in (a), the valve seat portion 12D further includes a flange portion 12Df provided on one end side (see Figure 7 (b)) and a valve seat annular seal groove 12De provided on the outer peripheral surface of the flange portion 12Df. The valve seat annular seal groove 12De accommodates a first O-ring Or1 having an outer diameter larger than that of the flange portion 12Df.

[0122] Here, in the first embodiment and the modified example of the sealing member of the first embodiment, the possibility of the first O-ring Or1 contacting other components before starting compression during the mounting operation of the pressure regulating valves 100a and 100d to the piping blocks B and Bd is examined.

[0123] First, as described above, before the first O-ring Or1 in the first embodiment starts to compress, the force-applying member 80 and the small-diameter portion 11S of the main body 11 pass near the inner circumference of the first O-ring Or1. In contrast, in a modified example of the sealing member of the first embodiment, before the first O-ring Or1 starts to compress, the first receiving groove G1 passes near the outer circumference of the first O-ring Or1. Therefore, in the modified example of the sealing member of the first embodiment, the first O-ring Or1 makes the distance that other components pass near it extremely short compared to the first O-ring Or1 in the first embodiment, that is, the possibility of contact is extremely small, thereby eliminating concerns (difficulty in removing due to the tilt of the pressure regulating valve caused by the sealing member), and reliably and smoothly performing installation and removal.

[0124] <About installation and removal>

[0125] In the installation operation of the pressure regulating valve 100d relative to the piping block Bd, the pressure regulating valve 100d is inserted from one end side of the first receiving groove G1 of the piping block Bd along the axis L direction, and is pushed by the connector C, and the valve body 10D moves toward the other end side in the axis L direction, whereby the force applying member 80 abuts against the bottom surface Gb of the storage space As and is relatively bent toward one end side. Here, the deformation amount L1' (refer to Figure 7 (a)) is the same as the first embodiment, and is set to be larger than the sealing member sliding distance L2' (refer to Figure 7 Thus, during the removal operation, the valve body 10D moves a distance corresponding to the deformation amount L1' of the force member 80 which is larger than the sealing member sliding distance L2', so that the valve body 10D can be reliably moved to a state where the sliding resistance of the first O-ring Or1 is not applied to the valve body 10D.

[0126] Furthermore, the force FB′ (see Figure 7 (a)) is the same as the first embodiment and is set to be greater than the force FD' (refer to Figure 7 (a)) is greater (FB'>FD'). In addition, the force FD' received by the valve body 10D from the fluid pressure represents the product of the pressure difference received by one end side and the other end side of the valve body 10D and the cross-sectional area of ​​the valve body 10D when the pressure regulating valve 100d is in the closed valve state ((P1-P2)×(D' / 2) 2×π, P1: primary side pressure, P2: secondary side pressure, D': maximum diameter of valve body 10D). Thus, in the installed state, the force FB' of the force applying member 80 is always greater than the force FD' received from the fluid pressure, so the valve body 10D and the connector C can always be kept in contact. As a result, the valve body 10D can be reliably prevented from moving in the installation direction ( Figure 7 The connection portion 80d of the urging member 80 is damaged due to excessive deformation due to the movement of the urging member 80 in the upward direction (a).

[0127] As described above, in the pressure regulating valve 100d in the modified example of the sealing member of the first embodiment, the existing problems 1 (using the wrong force member at the installation site) to the existing problems 4 (difficult to remove due to the inclined force) can be eliminated as in the first embodiment. In addition, in the pressure regulating valve 100d in the modified example of the sealing member of the first embodiment, the force FB' of the force member 80 is set to be larger than the force FD' received by the valve body 10D from the fluid pressure (FB'>FD') and the deformation amount L1' of the force member 80 is set to be larger than the sealing member sliding distance L2' (L1'>L2'), which can reliably prevent the force member 80 from being damaged and can reliably move the valve body 10D to a position where it will not be affected by the first O-ring Or1 during the removal operation. Furthermore, in the pressure regulating valve 100d in the modified example of the sealing component of the first embodiment, the welding portion WD is arranged on the side of the valve seat portion 12D, and the abutting surface Cc of the connector C reliably abuts against the open end 12Dd (pressing portion) of the valve seat portion 12, thereby eliminating the worry (difficulty in removing the pressure regulating valve due to the inclination of the welding portion), and the installation and removal operations can be reliably and smoothly performed. In addition, in the pressure regulating valve 100d in the modified example of the sealing component of the first embodiment, the valve seat portion 12D has the first O-ring Or1 (sealing component), which can make it extremely unlikely that other components will contact the first O-ring Or1, thereby eliminating the worry (difficulty in removing the pressure regulating valve due to the inclination of the sealing component), and the installation and removal operations can be reliably and smoothly performed.

[0128] (Modification 1 of the stopper of the first embodiment)

[0129] use Figure 8, the pressure regulating valve 100e in the modification example 1 of the limit portion of the first embodiment is described. In addition, the pressure regulating valve 100e in the modification example 1 of the limit portion of the first embodiment is different from the pressure regulating valve 100a of the first embodiment in that the main body 11 has a limit portion 11st, but the other structures are the same as the first embodiment. Here, the same symbols are marked for the same structures, and repeated descriptions are omitted. In addition, in the modification example 1 of the limit portion of the first embodiment, the piping block Be is further added with a third receiving groove G3 with a smaller inner diameter and capable of receiving the force-applying member 80E on the other end side of the second receiving groove G2 in the piping block B of the first embodiment, and the only difference is that the piping block Be is further added with a third receiving groove G3 with a smaller inner diameter and capable of receiving the force-applying member 80E.

[0130] <Concerns (difficulty in mounting due to large spring constant of the biasing member) and concerns (difficulty in managing deformation of the biasing member due to individual differences in the overall length of the valve body)>

[0131] Here, use Figure 3 Hereinafter, the following will describe the concerns caused by the large spring constant of the urging member 80 and the individual differences in the overall length La of the valve body 10 in the pressure regulating valve 100 a according to the first embodiment.

[0132] In the pressure regulating valve 100a of the first embodiment, [1] the force FB of the force member 80 is set to be larger than the force FD received by the valve body 10 from the fluid pressure in the installed state (FB>FD), and [2] the deformation amount L1 of the force member 80 is set to be larger than the sealing member sliding distance L2 of the first O-ring Or1 (L1>L2). That is, in the force member 80 of the first embodiment, one member can have two functions, that is, [1] a support function for preventing fluctuations due to fluid pressure, and [2] a movement function for ensuring smooth movement during removal. Therefore, according to the use conditions of the pressure regulating valve 100a, it is necessary to make the spring constant of the force member 80 larger, and correspondingly, a larger pushing force is required for the connector C, and there is a concern that the installation operation is difficult (hereinafter referred to as "concern (difficult installation operation due to the large spring constant of the force member)"). Furthermore, since the total length La of the valve body 10 in the direction of the axis L has individual differences, there is a concern that it will be difficult to manage the deformation amount L1 of the force-applying component 80 due to the insertion amount of the connector C during the installation operation (hereinafter referred to as "concern (difficulty in managing the deformation amount of the force-applying component due to individual differences in the total length of the valve body)").

[0133] <About the stopper>

[0134] In contrast, Figure 8As shown, first, in the piping block Be, an annular step portion St is formed between the second receiving groove G2 and the third receiving groove G3. In addition, in the pressure regulating valve 100e in the modification 1 of the stopper of the first embodiment, a stopper 11st is formed at the bottom 11u of the main body 11 to abut against the annular step portion St. Here, in the mounting operation of the pressure regulating valve 100e with respect to the piping block Be, before the flange Cf of the connector C abuts against the one end face Bs of the piping block Be, the stopper 11st of the main body 11 abuts against the annular step portion St of the piping block Be. Therefore, there is a gap Gp between the flange Cf and the one end face Bs. Thus, in the modification 1 of the stopper of the first embodiment, the stopper 11st is provided with [1] a supporting function for preventing fluctuations due to fluid pressure, and on the other hand, the force applying member 80E (force applying member in the removal direction) is provided with only [2] a moving function for ensuring smooth movement during the removal operation, thereby eliminating concerns (difficulty in mounting due to the large spring coefficient of the force applying member). Furthermore, in the modification 1 of the stopper of the first embodiment, the stopper 11st of the main body 11 abuts against the annular step portion St of the piping block Be to limit the deformation of the force applying member 80E, thereby eliminating concerns (difficulty in managing the deformation of the force applying member due to individual differences in the total length of the valve main body).

[0135] As described above, in the pressure regulating valve 100e in the modification 1 of the stopper of the first embodiment, the existing problems 1 (using the wrong force member at the installation site) to the existing problems 4 (difficult to remove due to the inclined force) can be eliminated as in the first embodiment. In addition, in the pressure regulating valve 100e in the modification 1 of the stopper of the first embodiment, the deformation amount of the force member 80 is set to be larger than the sliding distance of the sealing member as in the first embodiment, so that the valve body 10E can be reliably moved to a position that is not affected by the first O-ring Or1 during the removal operation. In addition, in the pressure regulating valve 100e in the modification 1 of the stopper of the first embodiment, the stopper 11st has [1] a supporting function for preventing fluctuations due to fluid pressure, and on the other hand, the force member 80E has only [2] a moving function for ensuring smooth movement during the removal operation, so that the concern (difficult to install due to the large spring constant of the force member) can be eliminated. In addition, in the pressure regulating valve 100e in the modification example 1 of the limit portion of the first embodiment, the limit portion 11st of the main body 11 abuts against the annular step portion St of the piping block Be to limit the deformation of the force-applying component 80E, thereby eliminating concerns (the difficulty in managing the deformation of the force-applying component due to individual differences in the entire length of the valve body).

[0136] (Modification 2 of the stopper of the first embodiment)

[0137] use Fig. 9 , the pressure regulating valve 100f in the modification example 2 of the position limiting portion of the first embodiment is described. In addition, the pressure regulating valve 100f in the modification example 2 of the position limiting portion of the first embodiment is different from the pressure regulating valve 100e in the modification example 1 of the position limiting portion of the first embodiment in that the pressure regulating valve 100f has a position limiting component 14F that is separate from the main body 11 and adopts a force-applying component 81, but the other structures are the same as those in the modification example 1 of the position limiting portion of the first embodiment. Here, the same symbols are marked for the same structures, and repeated descriptions are omitted. Furthermore, the force-applying component 81 in the modification example 2 of the position limiting portion of the first embodiment is the same as that using Figure 2 The biasing members described in (a) and (b) are the same, and thus the description thereof is omitted. Also, the structure of the piping block Bf in the second modification of the stopper of the first embodiment is the same as the structure of the piping block B of the first embodiment, and thus the description thereof is omitted.

[0138] In the first embodiment of the modification example 1 of the limiter, as Figure 8 As shown, it is necessary to form the annular step portion St so that the other end side of the storage space As of the piping block Be abuts against the stopper 11st of the body 11, and therefore it is desirable to suppress the processing cost of the piping block Be.

[0139] <About stopper parts>

[0140] In contrast, Fig. 9 As shown in FIG. 1 , the pressure regulating valve 100f in the second modification of the position limiting portion of the first embodiment has a position limiting component 14F (position limiting component) which is separate from the main body 11. The position limiting component 14F is formed by stamping a thick and rigid component made of a metal such as stainless steel or phosphor bronze. The position limiting component 14F has three legs and has the following features: when viewed from the axis L (refer to FIG. 1 ), the position limiting component 14F is Fig. 9 (c)) has a circular shape and has a fixing portion 14Fb with an opening 14Fa on the same axis as the axis L; three abutment portions 14Fc arranged evenly in the circumferential direction and erected on the other end side of the axis L direction; and when viewed from a direction orthogonal to the axis L direction (refer to Fig. 9(b)) three spoke portions 14Fs extending in the radial direction and connecting the outer side of the fixing portion 14Fb and the inner side of the abutment portion 14Fc. Here, the boss portion 52Fa of the fixing fitting 52F is respectively engaged with the opening portion 11o provided at the bottom 11u of the main body 11, the opening portion 14Fa provided at the limiting component 14F, and the opening portion 81a provided at the force-applying component 81, and then they are mutually engaged and fixed via the rivet portion Ri. Thus, the limiting component 14F and the force-applying component 81 can be provided integrally with the main body 11 without the need for additional components. Here, the abutment portion 14Fc of the limiting component 14F abuts against the bottom surface Gb of the piping block Bf to limit the deformation amount of the force-applying component 81. In addition, the valve body 10F is composed of the main body 11, the valve seat portion 12 (not shown) and the limiting component 14F, which are respectively formed as one body. The limiting component 14F can be manufactured at a relatively low cost.

[0141] As described above, in the pressure regulating valve 100f in the modification 2 of the stopper of the first embodiment, similarly to the modification 1 of the stopper of the first embodiment, the existing problems 1 (using the wrong force member at the installation site) to the existing problems 4 (difficult to remove due to the inclined force) can be eliminated. In addition, in the pressure regulating valve 100f in the modification 2 of the stopper of the first embodiment, similarly to the first embodiment, the deformation amount of the force member 81 is set to be larger than the sliding distance of the sealing member, so that the valve body 10F can be reliably moved to a position where it will not be affected by the first O-ring Or1 during the removal operation. In addition, in the pressure regulating valve 100f in the modification 2 of the stopper of the first embodiment, the abutment portion 14Fc of the stopper 14F abuts against the bottom surface Gb of the piping block Bf to limit the deformation amount of the force member 81, so that the concerns (difficult to install due to the large spring coefficient of the force member) and the concerns (difficult to manage the deformation amount of the force member due to the individual difference in the total length of the valve body) can be eliminated. In addition, in the pressure regulating valve 100f according to the second modification of the stopper portion of the first embodiment, the stopper member 14F can be manufactured at a low cost, and the processing cost of the pipe block Bf can be suppressed.

[0142] (Modification 3 of the stopper of the first embodiment)

[0143] use Fig.10, the pressure regulating valve 100g in the modification example 3 of the position limiting portion of the first embodiment is described. In addition, the pressure regulating valve 100g in the modification example 3 of the position limiting portion of the first embodiment is different from the pressure regulating valve 100f in the modification example 2 of the position limiting portion of the first embodiment in that it has a position limiting component 14G and a force applying unit 80G, but the other structures are the same as the modification example 2 of the position limiting portion of the first embodiment. Here, the same symbols are marked for the same structures, and repeated descriptions are omitted. In addition, the structure of the piping block Bg in the modification example 3 of the position limiting portion of the first embodiment is the same as the structure of the piping block B in the first embodiment, so the description is omitted.

[0144] Since the urging member 81 in the second modification of the stopper of the first embodiment is composed of a tripod leaf spring, it is not easy to set the spring constant to be large. However, in order to remove the pressure regulating valve 100f from the storage space As by smoother movement, it is desirable to make the spring constant of the urging member 81 large.

[0145] <Regarding stopper and force applying unit>

[0146] In contrast, Fig.10 As shown in FIG. 1 , a pressure regulating valve 100g in the third modification of the stopper of the first embodiment includes a stopper member 14G and a biasing unit 80G.

[0147] First, the urging unit 80G (removal direction urging member) includes: an abutment member 80Ga having a substantially cylindrical shape and having a spring support portion 80Gae with an expanded diameter near the center; and an urging member 80Gb composed of a compression coil spring.

[0148] Next, the limiting component 14G (limiting portion) is made of a metal such as stainless steel, phosphor bronze, etc., and is composed of a roughly bottomed cylindrical shape, and has a side wall portion 14Ge having a cylindrical shape, a fixing portion 14Gb arranged on one end side of the side wall portion 14Ge and having a circular ring shape, a drawn portion 14Gg arranged on the other end side of the side wall portion 14Ge, a contact portion 14Gc arranged on the other end side of the drawn portion 14Gg, and an opening portion 14Gf arranged on the inner side of the drawn portion 14Gg and coaxial with the axis L.

[0149] The force applying unit 80G is accommodated in the stopper member 14G in a state where one end side of the force applying member 80Gb abuts against the bottom 11u of the main body 11 and the other end side of the force applying member 80Gb abuts against the spring support portion 80Gae, and then the fixing portion 14Gb is fixed to the bottom 11u of the main body 11 via the welding portion W. Thus, the force applying unit 80G and the stopper member 14G are integrally provided with the main body 11. At this time, the inner peripheral portion of the other end side of the force applying member 80Gb is supported on the outer peripheral surface of one end side of the abutting member 80Ga, so that it is arranged in a state where bending and tilting relative to the axis L direction are suppressed. Furthermore, in the force applying unit 80G before the pressure regulating valve 100g is mounted on the piping block Bg, the spring support portion 80Gae of the contact member 80Ga is pushed by the force applying member 80Gb toward the other end side in the direction of the axis L, and one end side (including the contact portion 80Gac) of the contact member 80Ga protrudes outward from the opening 14Gf of the stopper 14G. At this time, the spring support portion 80Gae of the contact member 80Ga is held in a state of contact with the drawn portion 14Gg of the stopper 14G functioning as a disengagement prevention portion.

[0150] In the mounting operation of the pressure regulating valve 100g to the piping block Bg, the valve body 10G is inserted into the first receiving groove G1 (opening) of the piping block Bg and is directed toward the other end side ( Fig.10 The abutting portion 80Gac of the abutting member 80Ga first abuts against the bottom surface Gb of the storage space As. Furthermore, if the valve body 10G is moved toward the other end side in the direction of the axis L, the force member 80Gb is deformed and contracted in the direction of the axis L, and the abutting portion 14Gc of the limiting member 14G abuts against the bottom surface Gb of the storage space As. Therefore, the abutting portion 14Gc of the limiting member 14G abuts against the bottom surface Gb of the piping block Bg to limit the deformation of the force member 80Gb. Therefore, in the modification 3 of the limiting portion of the first embodiment, a compression coil spring can be used as the force member 80Gb, so the spring coefficient can be set to be larger as needed relatively easily.

[0151] As described above, in the pressure regulating valve 100g in the modification 3 of the stopper of the first embodiment, similarly to the modification 2 of the stopper of the first embodiment, the existing problems 1 (using the wrong force member at the installation site) to the existing problems 4 (difficult to remove due to the inclined force) can be eliminated. In addition, in the pressure regulating valve 100g in the modification 3 of the stopper of the first embodiment, similarly to the first embodiment, the deformation amount of the force unit 80G is set to be larger than the sliding distance of the sealing member, so that the valve body 10G can be reliably moved to a position where it will not be affected by the first O-ring Or1 during the removal operation. In addition, in the pressure regulating valve 100g in the modification 3 of the stopper of the first embodiment, the contact portion 14Gc of the stopper 14G contacts the bottom surface Gb of the piping block Bg to limit the deformation amount of the force member 80Gb, so that the concerns (difficult to install due to the large spring coefficient of the force member) and the concerns (difficult to manage the deformation amount of the force member due to the individual difference in the total length of the valve body) can be eliminated. In addition, in the pressure regulating valve 100g in the modification 3 of the stopper of the first embodiment, the compression coil spring can be used as the urging member 80Gb, so the spring coefficient can be set relatively easily to be large as required.

[0152] (Second Embodiment)

[0153] use Fig.11 , the pressure regulating valve 100h in the second embodiment is described. In addition, the pressure regulating valve 100h in the second embodiment is different from the pressure regulating valve 100a in the first embodiment in that the pressure regulating valve 100a in the first embodiment is configured upside down while maintaining the outer shape, and a force applying unit 80H and a limiter 14H are provided on the valve seat portion 12H, but the other structures are substantially the same as those in the first embodiment. Here, the same symbols are marked for the same structures, and repeated descriptions are omitted. In addition, the pressure regulating valve 100h in the second embodiment has a first adjustment threaded portion 42H (a main body side adjustment threaded portion 42Ha and a valve seat side adjustment threaded portion 42Hb) and a second adjustment threaded portion Th (a valve seat side threaded portion 12HTh and a limiter side threaded portion 14Hth), but the structure of the first adjustment threaded portion 42H (position adjustment portion) is the same as the structure of the adjustment threaded portion 42 of the first embodiment, so the description is omitted.

[0154] Here, in the pressure regulating valve 100h of the second embodiment, in order to improve the degree of freedom of the flow direction and the installation direction of the fluid path, the pressure regulating valve 100a of the first embodiment is configured to be upside down, and a force applying unit 80H and a stopper 14H are provided in the valve seat portion 12H, and the force applying unit 80H divides the primary port 1A, and the horizontal hole 11a of the main body 11H divides the secondary port 1B. In addition, the valve main body 10H is composed of the main body 11H, the valve seat portion 12H, and the stopper 14H, which are respectively formed as one body. Here, the valve seat portion 12H, the stopper 14H, and the force applying unit 80H in the second embodiment are mainly described in sequence.

[0155] <About the valve seat>

[0156] The valve seat portion 12H includes an annular valve seat 12a, an inner peripheral surface 12b, and an open end 12Hd provided at the other end side. A valve seat portion side thread portion 12HTh composed of a male thread portion is formed on the outer peripheral surface at the other end side of the valve seat portion 12H.

[0157] <About stopper parts>

[0158] The limiting component 14H (limiting portion) is made of a metal such as stainless steel or phosphor bronze, and is roughly in the shape of a bottomed cylinder, and comprises: a side wall portion 14He having a cylindrical shape; a limiting portion side threaded portion 14Hth which is arranged on one end side of the side wall portion 14He and is composed of a concave threaded portion; a drawn portion 14Hg arranged on the other end side of the side wall portion 14He; a contact portion 14Hc arranged on the other end side of the drawn portion 14Hg; and an opening portion 14Hf which is arranged on the inner side of the drawn portion 14Hg and is coaxial with the axis L.

[0159] <About the force applying unit>

[0160] The urging unit 80H (removal direction urging member) includes: an abutment member 80Ha having a substantially cylindrical shape and having a spring support portion 80Hae with a diameter expanded near the center and a through hole 80Hat extending along the axis L; and an urging member 80Hb composed of a compression coil spring.

[0161] As for the force unit 80H, the contact component 80Ha is inserted while sliding on the inner peripheral surface 12b of the valve seat portion 12H, so that one end side of the force component 80Hb contacts the open end 12Hd of the valve seat portion 12H, and on the other hand, the other end side of the force component 80Hb contacts the spring support portion 80Hae. Then, after the force unit 80H is accommodated in the limiting component 14H, the limiting component 14H is fixed to the other end side of the valve seat portion 12H via the second adjustment threaded portion Th (the valve seat side threaded portion 12HTh and the limiting portion side threaded portion 14Hth) and the welding portion W. Thus, the force unit 80H and the limiting component 14H are integrally provided with the main body 11H. At this time, the force component 80Hb is supported on the outer peripheral surface of the contact component 80Ha, and is therefore arranged in a state in which bending and tilting relative to the axis L direction are completely suppressed. Furthermore, in the force applying unit 80H before the pressure regulating valve 100h is mounted on the piping block Bh, the spring support portion 80Hae of the contact member 80Ha is pushed by the force applying member 80Hb toward the other end side in the direction of the axis L, and one end side (including the contact portion 80Hac) of the contact member 80Ha protrudes outward from the opening 14Hf of the stopper 14H. At this time, the spring support portion 80Hae of the contact member 80Ha is held in contact with the drawn portion 14Hg of the stopper 14H functioning as a disengagement prevention portion.

[0162] <About installation of pressure regulating valve>

[0163] Hereinafter, the shapes of the valve body 10H, the piping block Bh, and the connector C′ will be mainly described.

[0164] The valve body 10H is composed of a body 11H, a valve seat portion 12H, and a stopper 14H. The body 11H is formed with a large diameter portion 11L and a small diameter portion 11S whose outer diameter gradually decreases from one end side toward the other end side along the axis L. In addition, the valve seat portion 12H has an outer diameter smaller than that of the small diameter portion 11S. In addition, the outer diameter of the stopper 14H is the same as that of the small diameter portion 11S.

[0165] The pipe block Bh has an insertion hole along the axis L direction, and a first receiving groove G1 (opening) and an annular groove Ga are formed on one end side of the insertion hole. The inner diameter of the first receiving groove G1 is set to be slightly larger than the outer diameter of the large diameter portion 11L of the main body 11H. 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 second receiving groove G2 and a primary side flow path Fp1 are formed in the insertion hole along the axis L direction, which are reduced in diameter in a step-like manner from the annular groove Ga toward the other end side. The inner diameter of the second receiving groove G2 is set to be slightly larger than the outer diameter of the small diameter portion 11S of the main body 11H. In addition, an annular step portion St is formed between the second receiving groove G2 and the primary side flow path Fp1. In addition, an annular sealing groove Gs for accommodating a first O-ring Or1 (sealing component) is formed on the other end side of the first receiving groove G1. In addition, a threaded hole Sh is formed on one end surface Bs of the pipe block Bh.

[0166] The connector C' (fixing member) holds the valve body 10H in the direction of the axis L in the fluid path, has a shape corresponding to the opening of the fluid path, and is formed with a flange Cf extending outward in the radial direction, an insertion portion Ci inserted into the insertion hole of the piping block Bh, and a contact surface Cc located at the other end side of the insertion portion Ci from one end side to the other end side. The flange Cf is provided with a mounting hole Ch for inserting the fastening screw Sw. In addition, a connector annular seal groove Cg for accommodating the second O-ring Or2 is formed on the outer peripheral surface of the insertion portion Ci. In addition, a boss receiving groove Cgb along the same axis as the axis L is formed on the contact surface Cc of the connector C'. In addition, the connector C' in the second embodiment has a shape corresponding to the opening of the fluid path, but is not limited to this. For example, as long as it is a component such as a C-shaped ring that is provided in the inner peripheral groove of the fluid path and generates elastic force in the radial direction to hold the valve body 10H in the direction of the axis L in the fluid path, it can also be any form.

[0167] <About installation operation>

[0168] In the mounting operation of the pressure regulating valve 100h to the piping block Bh, the valve body 10H is inserted into the first receiving groove G1 (opening) of the piping block Bh and is directed toward the other end side ( Fig.11) moves above the connector C', whereby the abutment portion 80Hac of the abutment component 80Ha first abuts against the annular step portion St. Moreover, if the valve body 10H is pushed by the connector C' while moving toward the other end side in the direction of the axis L, the force-applying component 80Hb is deformed and contracted in the direction of the axis L, whereby the abutment portion 14Hc of the limiting component 14H abuts against the annular step portion St. In addition, the boss portion 52Ha is received in the boss receiving groove Cgb in a manner that does not interfere with the connector C'. Therefore, the abutment portion 14Hc of the limiting component 14H abuts against the annular step portion St of the piping block Bh to limit the deformation amount of the force-applying component 80Hb. In addition, with respect to the deformation amount of the force-applying component 80Hb in the second embodiment, before shipment, the limiting component 14H is rotated relative to the valve seat portion 12H via the second adjustment threaded portion Th and moved in the direction of the axis L, thereby being adjusted to a desired value. Furthermore, in the second embodiment, since a compression coil spring can be adopted as the urging member 80Hb, the spring coefficient can be set large as necessary.

[0169] Thus, in the pressure regulating valve 100h of the second embodiment, as an L-shaped fluid path in the valve open state, the fluid flows in the order of the primary side flow path Fp1 of the piping block Bh, the primary side port 1A divided by the through hole 80Hat of the abutment component 80Ha, the inner peripheral surface 12b of the valve seat portion 12, the secondary side port 1B divided by the horizontal hole 11a of the main body 11H, and the secondary side flow path Fp2 of the piping block Bh.

[0170] As described above, in the pressure regulating valve 100h of the second embodiment, similarly to the first embodiment, the existing problems 1 (using the wrong force member at the installation site) to 4 (difficult to remove due to the inclined force) can be eliminated. In addition, in the pressure regulating valve 100h of the second embodiment, similarly to the first embodiment, the deformation amount of the force unit 80H is set to be larger than the sliding distance of the sealing member, so that the valve body 10H can be reliably moved to a position where it will not be affected by the first O-ring Or1 during the removal operation. In addition, in the pressure regulating valve 100h of the second embodiment, the abutment portion 14Hc of the stopper 14H abuts against the annular step portion St of the piping block Bh to limit the deformation amount of the force member 80Hb, and can be adjusted by the second adjustment thread portion Th, so that the concerns (difficult to install due to the large spring coefficient of the force member) and the concerns (difficult to manage the deformation amount of the force member due to the individual difference in the total length of the valve body) can be eliminated. In addition, in the pressure regulating valve 100h of the second embodiment, a compression coil spring can be used as the urging member 80Hb, so the spring coefficient can be set larger as needed. In addition, the pressure regulating valve 100h of the second embodiment can increase the degree of freedom of the flow direction of the fluid path, the installation direction, etc.

[0171] (Third Embodiment)

[0172] use Fig.12 , the pressure regulating valve 100i in the third embodiment is described. In addition, the pressure regulating valve 100i in the third embodiment is different from the pressure regulating valve 100f in the second modification of the position-limiting portion in the first embodiment in that the pressure regulating valve 100f in the second modification of the position-limiting portion in the first embodiment is adapted to the straight-line flow path, and a flow path is formed inside the valve body 10I in the direction of the axis L, but the other structures are substantially the same as those in the second modification of the position-limiting portion in the first embodiment. Here, the same symbols are given to the same structures, and repeated descriptions are omitted.

[0173] In the pressure regulating valves 100a to 100h of the first and second embodiments, the pressure regulating valves having an L-shaped fluid path are described. However, the fluid path that can be applied to the pressure regulating valve in this embodiment is not limited to the L-shaped fluid path, and can include various changes in the fluid path (for example, a straight fluid path). Here, the case where the pressure regulating valve 100i in the third embodiment adopts a straight path is described.

[0174] In the pressure regulating valve 100i of the third embodiment, a fluid path extending in the direction of the axis L is formed inside the main body 11I in a manner adapted to the straight path, and the structure of the other end of the valve main body 10I (particularly, a fan-shaped gap 14Io is formed in the stopper 14I) is studied. Here, the main body 11I, the stopper 14I, and the force-applying member 80I in the third embodiment are mainly described in sequence. In addition, the valve main body 10I is composed of the main body 11I, the valve seat portion 12, and the stopper 14I, which are formed into one piece via the welding portion W.

[0175] <About the subject>

[0176] The main body 11I has a cylindrical shape, and a first small diameter portion 11IS1, a large diameter portion 11IL, and a second small diameter portion 11IS2 are formed in sequence from one end side toward the other end side along the axis L direction. In addition, the inner diameter and the length in the axis L direction of the large diameter portion 11IL are set larger than those of the first small diameter portion 11IS1 and the second small diameter portion 11IS2, so that a straight fluid path extending in the axis L direction is defined between the inner peripheral surface of the main body 11I and the outer peripheral surface of the pressure-sensing bellows 51I.

[0177] <About stopper parts>

[0178] use Fig.12 (b) and (c) illustrate the position limiting component 14I. Fig.12 The circular dotted line in (c) shows the outer peripheral surface of the adjacent second small diameter portion 11IS2.

[0179] The stopper 14I (stopper) is made of a metal such as stainless steel or phosphor bronze, and is formed by stamping a thick and rigid part. Fig.12As shown in (b), the stopper 14I includes: a recessed portion 14Ir recessed toward the other end side in the direction of the axis L in order to house the connecting member 32 and accommodate the bottom cylindrical pressure-sensing bellows 51I; a convex portion 14Ip located at the front and back of the recessed portion 14Ir and fixing the force-applying member 80I; and six spokes 14Is uniformly arranged in the circumferential direction and extending in the radial direction. A contact portion 14Ic erected toward the other end side in the direction of the axis L is provided at the outer peripheral edge of a non-adjacent group of three spokes 14Is among the six spokes 14Is, and a welded portion W fixed to the outer peripheral edge of the other end of the main body 11I by spot welding or the like is provided at the outer peripheral edge of one end side of another non-adjacent group of three spokes 14Is. In addition, the outer diameter of the spoke portion 14Is having the contact portion 14Ic is the same as the outer diameter of the large diameter portion 11IL of the main body 11I, while the outer diameter of the spoke portion 14Is not having the contact portion 14Ic is the same as the outer diameter of the second small diameter portion 11IS2 of the main body 11I. In addition, a plurality of fan-shaped gaps 14Io that divide the secondary port 1B are formed between the plurality of spoke portions 14Is. In addition, in the stopper 14I of the third embodiment, the number of the spoke portions 14Is is set to six, but this is only an example and can be selected as needed.

[0180] <About force-applying components>

[0181] like Fig.12 As shown in (d) and (e), the force applying member 80I (extraction direction force applying member) is composed of a tripod leaf spring. The force applying member 80I has: when viewed from the axis L direction (refer to Fig.12 (e)) has a circular fixing portion 80Ib; has a substantially rectangular shape and three abutment portions 80Ic arranged evenly in the circumferential direction; when viewed from a direction perpendicular to the axis L (refer to Fig.12 (d)) extends in a direction having an angle relative to the axis L direction and connects the outer side of the fixing portion 80Ib with the inner side of the abutment portion 80Ic. Furthermore, the fixing portion 80Ib is fixed relative to the convex portion 14Ip of the limiting component 14I via welding portions W formed by spot welding or the like and arranged evenly in the circumferential direction. Thus, the force-applying component 80I and the limiting component 14I are integrally provided with the main body 11I. Furthermore, when viewed from the axis L direction, the connecting portion 80Id of the force-applying component 80I completely overlaps with the spoke portion 14Is of the limiting component 14I, so that the flow of the fluid passing through the plurality of fan-shaped gaps 14Io becomes smooth.

[0182] <About installation of pressure regulating valve>

[0183] The shape of the piping block Bi will be described. In addition, since the structure of the connector C is the same as that of the connector C in the modification 2 of the stopper of the first embodiment, the description thereof will be omitted.

[0184] The pipe block Bi has an insertion hole along the axis L, and a first receiving groove G1 and a secondary flow path Fp2 are formed in the insertion hole along the axis L, which are stepped from one end to the other end. An annular step portion St is formed between the first receiving groove G1 and the secondary flow path Fp2. The inner diameter of the first receiving groove G1 is set to be slightly larger than the outer diameter of the large diameter portion 11IL of the main body 11I. In addition, a threaded hole Sh is formed on one end surface Bs of the pipe block Bi.

[0185] <About installation operation>

[0186] In the mounting operation of the pressure regulating valve 100i to the piping block Bi, the valve body 10I is inserted into the first receiving groove G1 (opening) of the piping block Bi so as to face the other end side ( Fig.12 The valve body 10I is moved to the upper side of the annular step portion St, whereby the contact portion 80Ic of the force member 80I first contacts the annular step portion St. Furthermore, when the valve body 10I is pushed by the connector C and moved toward the other end side in the direction of the axis L, the force member 80I is deformed and contracted in the direction of the axis L, whereby the contact portion 14Ic of the stop member 14I contacts the annular step portion St. Therefore, the contact portion 14Ic of the stop member 14I contacts the annular step portion St of the piping block Bi to limit the deformation amount of the force member 80I.

[0187] Therefore, in the pressure regulating valve 100i of the third embodiment, as a straight line path in the valve open state, the fluid flows in the order of the primary side flow path Fp1 of the connector C, the primary side port 1A divided by the valve seat portion 12, the fluid path extending along the axis L inside the valve body 10I, the secondary side port 1B divided between the body 11I and the fan-shaped gap 14Io, and the secondary side flow path Fp2 of the piping block Bi.

[0188] As described above, in the pressure regulating valve 100i of the third embodiment, similar to the modification example 2 of the stopper of the first embodiment, the existing problems 1 (using the wrong force-applying member at the installation site) to the existing problems 4 (difficult to remove due to the inclined force) can be eliminated. In addition, in the pressure regulating valve 100i of the third embodiment, the abutment portion 14Ic of the stopper 14I abuts against the annular step portion St of the piping block Bi to limit the deformation of the force-applying member 80I, thereby eliminating the concerns (difficulty in installation due to the large spring coefficient of the force-applying member) and the concerns (difficulty in managing the deformation of the force-applying member due to the individual differences in the total length of the valve body). In addition, in the pressure regulating valve 100i of the third embodiment, it is possible to adapt to various changes in the fluid path (for example, a straight fluid path) and the like.

[0189] (Modification of the force applying unit of the third embodiment)

[0190] use Fig.13 , the pressure regulating valve 100j in the modified example of the force applying unit of the third embodiment is described. In addition, the pressure regulating valve 100j in the modified example of the force applying unit of the third embodiment is different from the pressure regulating valve 100i in the third embodiment in that a force applying unit 80J is provided on the outer peripheral surface of the main body 11J, but the other structures are substantially the same as those in the third embodiment. Here, the same symbols are marked on the same structures, and repeated descriptions are omitted.

[0191] <Concerns (damage to force-applying parts due to falling)>

[0192] Here, use Fig.12 , the following describes concerns that may arise when the pressure regulating valve 100i is dropped in the third embodiment.

[0193] In the pressure regulating valve 100i of the third embodiment, since the urging member 80I is provided on the other end side of the valve body 10I, it can be easily accessed from the outside environment. Therefore, in the case where the pressure regulating valve 100i is accidentally dropped during installation work, there is a concern that the urging member 80I may be damaged, such as the contact portion 80Ic being bent (hereinafter referred to as a concern (damage to the urging member due to dropping)).

[0194] On the other hand, in the pressure regulating valve 100j in the modified example of the force applying unit of the third embodiment, as shown in FIG. Fig.13As shown in the figure, a force applying unit 80J is provided on the outer peripheral surface of the main body 11J to eliminate the worry (damage of the force applying component due to falling). Here, the main body 11J, the stopper 14J, and the force applying unit 80J in the modified example of the force applying unit of the third embodiment are mainly described in sequence. In addition, the valve main body 10J is composed of the main body 11J, the valve seat portion 12, and the stopper 14J, which are respectively formed into one piece via the welding portion W.

[0195] <About the subject>

[0196] The main body 11J has a substantially cylindrical shape, and a small diameter portion 11JS and a large diameter portion 11JL are formed in order from one end to the other end along the axis L. The inner diameter and the length in the axis L direction of the large diameter portion 11JL are set larger than those of the small diameter portion 11JS.

[0197] <About stopper parts>

[0198] use Fig.13 (b) and (c) illustrate the position limiting component 14J. Fig.13 The circular dotted lines in (c) indicate the outer peripheral surfaces of the adjacent large-diameter portions 11JL.

[0199] The stopper 14J (stopper) is made of a metal such as stainless steel or phosphor bronze, and is formed by stamping a thick and rigid part. The stopper 14J has six legs, which are: Fig.13(c)) has a fixing part 14Jb having a circular shape and an opening 14Ja on the same axis as the axis L; and six spokes 14Js uniformly arranged on the outer periphery of the fixing part 14Jb in the circumferential direction. A contact portion 14Jc erected toward the other end side in the direction of the axis L is provided on the outer periphery of a non-adjacent group of three spokes 14Js among the six spokes 14Js, and a welding portion W fixed to the outer periphery of the other end of the main body 11J by spot welding or the like is provided on the outer periphery of one end side of another non-adjacent group of three spokes 14Js. Here, the boss portion 52Ja of the fixing fitting 52J is fitted with the opening 14Ja provided in the stopper 14J, and then is fitted and fixed to each other via the rivet portion Ri. In addition, the outer periphery of one end side of the spoke 14Js without the contact portion 14Jc is fixed to the outer periphery of the other end of the main body 11J via the welding portion W formed by spot welding or the like. In addition, the outer diameter of the spoke portion 14Js having the contact portion 14Jc is larger than the outer diameter of the large diameter portion 11JL of the main body 11J, and the outer diameter of the spoke portion 14Js without the contact portion 14Jc is the same as the outer diameter of the large diameter portion 11JL of the main body 11J. In addition, a plurality of fan-shaped gaps 14Jo that divide the secondary side port 1B are formed between the plurality of spoke portions 14Js. In addition, in the stopper 14J of the modified example of the urging unit of the third embodiment, the number of the spoke portions 14Js is set to six, but this is only an example and can be selected as needed.

[0200] <About the force applying unit>

[0201] The force applying unit 80J (force applying component in the removal direction) includes: a retaining ring 80Jc (such as a C-shaped ring, etc.), which has a restoring force toward the inside in the radial direction; an abutment component 80Ja, which has a circular ring shape when viewed from the axis L direction and has an L-shaped cross-sectional shape corresponding to the first annular step portion St1; and a force applying component 80Jb, which is composed of a compression coil spring.

[0202] In the force applying unit 80J, first, the slightly enlarged retaining ring 80Jc is arranged in the main body annular groove 11Jr formed in the large diameter portion 11JL. Then, from the other end side in the direction of the axis L, the force applying member 80Jb and the contact member 80Ja are inserted while sliding on the outer peripheral surface of the large diameter portion 11JL in sequence, and then the other end of the main body 11J and one end of the stopper 14J are fixed via the welding portion W. Thus, the contact member 80Ja is pushed toward the other end side in the direction of the axis L by the force applying member 80Jb, but is maintained in a state of contact with the stopper 14J functioning as a disengagement prevention portion.

[0203] <About installation of pressure regulating valve>

[0204] The shape of the piping block Bj will be described. In addition, since the structure of the connector C is the same as that of the connector C of the third embodiment, the description thereof will be omitted.

[0205] The piping block Bj has a through hole along the axis L, and a first receiving groove G1, a second receiving groove G2, and a secondary side flow path Fp2 are formed in the through hole along the axis L, which are reduced in diameter from one end side to the other end side in a step-like manner. A first annular step portion St1 is formed between the first receiving groove G1 and the second receiving groove G2, and a second annular step portion St2 is formed between the second receiving groove G1 and the secondary side flow path Fp2. In addition, the inner diameter of the first receiving groove G1 is set to be slightly larger than the outer diameter of the force unit 80J. In addition, the inner diameter of the second receiving groove G2 is set to be slightly larger than the outer diameter of the large diameter portion 11JL. In addition, a threaded hole Sh is formed on one end surface Bs of the piping block Bj.

[0206] <About installation operation>

[0207] In the mounting operation of the pressure regulating valve 100j to the piping block Bj, the valve body 10J is inserted into the first receiving groove G1 (opening) of the piping block Bj so as to face the other end side ( Fig.13 The valve body 10J is moved to the upper side of the valve body 10J, whereby the contact part 80Ja of the force applying unit 80J first contacts the first annular step St1. Furthermore, when the valve body 10J is pushed by the connector C and moved toward the other end side in the direction of the axis L, the force applying member 80Jb is deformed and contracted in the direction of the axis L, whereby the contact part 14Jc of the stopper 14J contacts the second annular step St2. Therefore, the contact part 14Jc of the stopper 14J contacts the second annular step St2 of the piping block Bj to limit the deformation amount of the force applying member 80Jb.

[0208] Therefore, in the pressure regulating valve 100j in the modified example of the force unit of the third embodiment, since the force unit 80J is provided on the outer peripheral surface of the main body 11J, even if the pressure regulating valve 100j is accidentally dropped during installation work, the force component 80Jb is composed of a compression coil spring instead of a leaf spring, and is supported on the inner peripheral side of the force component 80Jb by the large diameter portion 11JL in a manner that does not always cause bending and twisting, so that concerns (damage of the force component caused by falling) can be eliminated.

[0209] As described above, in the pressure regulating valve 100j in the modified example of the force applying unit of the third embodiment, the existing problems 1 (using the wrong force applying member at the installation site) to the existing problems 4 (difficult to remove due to the inclined force) can be eliminated as in the third embodiment. In addition, in the pressure regulating valve 100j in the modified example of the force applying unit of the third embodiment, the abutment portion 14Jc of the limiter member 14J abuts against the second annular step portion St2 of the piping block Bj to limit the deformation amount of the force applying member 80Jb, thereby eliminating the concerns (difficulty in mounting due to the large spring coefficient of the force applying member) and the concerns (difficulty in managing the deformation amount of the force applying member due to individual differences in the total length of the valve body). Moreover, in the pressure regulating valve 100j in the modified example of the force unit of the third embodiment, since the force unit 80J is provided on the outer peripheral surface of the main body 11J, even if the pressure regulating valve 100j is accidentally dropped during installation work, the large diameter portion 11JL supports the inner peripheral side of the force component 80Jb composed of the compression coil spring in a manner that does not cause bending or twisting, and therefore concerns (damage to the force component due to dropping) can be eliminated.

[0210] <Other methods>

[0211] The pressure regulating valves 100a to 100j of this embodiment are of course applicable to all fluid devices and fluid circuits. Furthermore, the present invention is not limited to the above-mentioned modes, embodiments, and variations, and can be appropriately changed and modified within the scope of the technical concept of the present invention.

Claims

1. A pressure regulating valve inserted into a fluid path, characterized in that: have: a valve body having a bottomed cylindrical shape and provided with a valve seat; and The valve core moves along the axial direction to seat or leave the valve seat. The valve body is a component integrally provided with a removal direction biasing member. The removal direction urging member has a force for urging the valve body in the removal direction of the fluid path when the valve body is inserted into the fluid path by the fixing member abutting against one end of the valve body.

2. The pressure regulating valve according to claim 1, characterized in that: The urging force of the removal direction urging member is set to be greater than a force received by the valve body from the fluid pressure so that the valve body does not move in the mounting direction due to the fluid pressure in the mounted state.

3. The pressure regulating valve according to claim 1, characterized in that: The valve body includes a limiting portion. In the mounted state, the limiter abuts against the fluid path to limit the deformation of the removal direction biasing member.

4. The pressure regulating valve according to claim 1 or 2, characterized in that: In the above-mentioned installation state, a sealing component is clamped between the outer peripheral surface of the above-mentioned valve body and the inner peripheral surface of the above-mentioned fluid path, and the deformation amount of the above-mentioned removal direction force application component is set to be larger than the distance that the above-mentioned sealing component moves in the axial direction in a compressed state when the above-mentioned valve body is inserted into the above-mentioned fluid path.

5. The pressure regulating valve according to claim 1, characterized in that: A pressure-sensing bellows unit for applying force to the valve core toward the valve seat is also provided. The pressure-sensing bellows unit is provided with a boss portion protruding toward the other end side. The boss portion includes caulking portions that are respectively fitted and fixed to an opening portion provided at the bottom of the valve body and an opening portion provided at the removal direction urging member.

6. The pressure regulating valve according to claim 1 or 2, characterized in that: The valve body includes a body and a valve seat portion having the valve seat. The pressure regulating valve further includes a position adjusting portion capable of changing the relative positions of the main body and the valve seat portion in the axial direction. The position adjustment portion defines the entire length of the valve body in the axial direction.

7. The pressure regulating valve according to claim 1 or 2, characterized in that: The removal direction force applying member comprises: A fixing portion, which is directly or indirectly fixed to the bottom of the valve body; an abutment portion that abuts against the fluid path in the installed state; and A connecting portion connects the fixing portion and the contact portion.

8. The pressure regulating valve according to claim 1 or 2, characterized in that: The valve body has a bottomed cylindrical shape with an opening at one end. In order to equalize the pressure of a storage space defined between the other end side of the valve body and the fluid path, the valve body is provided with a pressure equalizing path extending in the axial direction.

9. The pressure regulating valve according to claim 6, characterized in that: A joint portion for fixing each other is formed on one end side of each of the main body and the valve seat portion. One end portion of the valve seat portion has a pressing portion pressed by the fixing member. The engaging portion is formed on the other end side of the pressing portion.

10. A connection structure, characterized in that: The pressure regulating valve according to any one of claims 1, 2, 3, and 5 and the fixing member having a shape corresponding to the opening of the fluid path are inserted into the fluid path, thereby connecting the pressure regulating valve to the fluid path.

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