Pressure control valve

Abstract

To provide a pressure control valve capable of ensuring downsizing and enhancing versatility with devised arrangement of a position adjustment part.SOLUTION: A pressure control valve 100 comprises: a main body 11 having a secondary side port 1B; a valve seat part 12, which is a different body from the main body 11, disposed on one end side of the main body, with a primary side port 1A and a valve seat 12a; a valve body 20 that moves in an axis line L direction, and is seated on or separated from the valve seat 12a; biasing means 41 and 51 for biasing the valve body 20 to the valve seat 12a; and a position adjustment part 42 that can adjust biasing force from the biasing means 41 and 51. The position adjustment part 42 has a configuration capable of displacing a relative position in the axial direction in the valve seat part 12 and the main body 11. Thereby, a conventional problem 1 (large installation space) and a conventional problem 2 (no applicable to piping block) can be solved.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pressure regulating valve equipped with a position adjustment portion. [Background technology]

[0002] In pressure regulating valves, in order to variably control the opening degree according to the pressure acting on the valve element, many of them have a structure in which an adjustment screw member, which is a position adjustment part, is provided and the valve opening (or valve closing) pressure can be set as desired.

[0003] For example, Patent Document 1 discloses a pressure regulating valve 1200 (hereinafter referred to as a "conventional pressure regulating valve") as shown in Fig. 12, which includes a valve body 1210 having a primary side port 1201A, a secondary side port 1201B, and a valve seat 1212a, and a valve body 1220 that is seated on or separated from the valve seat 1212a. Patent Document 1 also discloses a pressure regulating valve further including a slide unit 1230 that supports the slide of the valve body 1220 in the axial L direction by a cylinder member 1231 and a piston member 1233, an adjustment spring unit 1240 that adjusts the biasing force of a valve spring 1241 via an adjustment screw member 1242, a pressure sensing bellows unit 1250 that has a pressure sensing bellows 1251, and an elastic member 1270 that has a plurality of legs 1272 that come into contact with an inner circumferential surface 1212b.

[0004] Here, in the conventional pressure regulating valve, due to its structure, the biasing force of the valve spring 1241 and the pressure sensing bellows 1251 was adjusted by the adjustment screw member 1242 on the secondary port 1201B side of the valve spring 1241 and the pressure sensing bellows 1251. Therefore, in the conventional pressure regulating valve, since it is necessary to arrange the adjustment screw member 1242 inside the secondary port 1201B, there was a concern that the valve would be long overall in the direction of the axis L and require a large installation space (hereinafter referred to as "Conventional problem 1 (large installation space)").

[0005] In addition, there has been a demand for the pressure regulating valve to be mounted in various piping paths depending on the user's application, particularly in flow paths formed in piping blocks in order to reduce weight and save space.

[0006] However, conventional pressure regulating valves are connected between the primary and secondary piping via a relatively large diameter flange, etc., and therefore cannot be applied to flow paths within a piping block, etc., and there is a concern that their versatility will be extremely low (hereinafter referred to as "Conventional Problem 2 (Inapplicability to piping blocks)"). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2020-16290 A Summary of the Invention [Problem to be solved by the invention]

[0008] An object of the present invention is to provide a pressure regulating valve which can be made smaller and more versatile by devising an arrangement of a position adjustment portion. [Means for solving the problem]

[0009] In order to solve the above problems, the pressure regulating valve comprises a main body having a secondary side port, a valve seat portion that is separate from the main body and is arranged at one end side of the main body and has a primary side port and a valve seat, a valve body that moves in the axial direction and seats and unseats on the valve seat, a biasing means that biases the valve body towards the valve seat, and a position adjustment portion capable of adjusting the biasing force of the biasing means, and the position adjustment portion is configured to be able to displace the relative axial positions of the valve seat portion and the main body.

[0010] In the above pressure regulating valve, the position adjustment portion may be made of an adjustment screw portion, and the adjustment screw portion may be provided on the valve seat portion and the main body, respectively.

[0011] Moreover, in the above pressure regulating valve, the valve seat portion may have a pair of rotary tool insertion portions on one end surface, and the pair of rotary tool insertion portions may be arranged on the outer circumferential side of the primary side port when viewed in the axial direction.

[0012] The pressure regulating valve may further include a biasing force adjustment means for moving the valve seat portion axially relative to the main body via the adjustment screw portion, and a biasing force fixing means for fixing the valve seat portion to the main body in a state in which the valve body is biased against the valve seat portion by the biasing force adjustment means.

[0013] In the above pressure regulating valve, the valve seat portion may extend from the main body toward one end, and an outer circumferential surface at one end of the valve seat portion may be provided with an outer circumferential groove for accommodating a seal member.

[0014] Moreover, in the above pressure regulating valve, the valve seat portion may have a flange portion on one end side of the adjustment screw portion, and between an outer peripheral surface of the flange portion and an inner peripheral surface of the main body as viewed in the axial direction, there may be a welded portion provided by the biasing force fixing means and a gap portion where the welded portion is not provided, and a bleed flow path that constantly communicates between the primary side port and the secondary side port may be composed of the gap portion and the threaded gap of the adjustment screw portion.

[0015] In addition, the above pressure regulating valve may have a flange notch portion formed in a part of the outer peripheral edge of the flange portion, and the gap portion may be formed in the gap between the outer peripheral surface of the flange notch portion and the inner peripheral surface of the main body.

[0016] Moreover, in the above pressure regulating valve, at least one of the valve seat portion and the adjustment screw portion in the main body may be formed with a thread notch portion extending in the axial direction, and the threaded gap may be formed in the gap between the thread notch portion and the adjustment screw portion facing the thread notch portion.

[0017] Moreover, in the above pressure regulating valve, the main body may have a reduced diameter portion, and a lateral hole that defines a secondary side port may be formed in the reduced diameter portion. Effect of the Invention

[0018] According to the present invention, by devising the arrangement of the position adjustment portion, it is possible to provide a pressure regulating valve that can be made compact and has high versatility. [Brief description of the drawings]

[0019] [Figure 1] 1A and 1B are explanatory diagrams showing a pressure regulating valve according to a first embodiment of the present invention, in which (a) is a longitudinal sectional view of the pressure regulating valve, and (b) is a bottom view seen from the direction of arrow Ib shown in (a). [Diagram 2] 2A to 2C are explanatory views of the valve seat portion shown in FIG. 1, where (a) is a bottom perspective view, (b) is a side view, and (c) is a bottom view. [Diagram 3] 2 is a cross-sectional view showing a state in which the pressure regulating valve shown in FIG. 1 is attached to a piping block. [Figure 4] 4A and 4B are enlarged cross-sectional views of a region surrounded by dashed line IVa shown in FIG. 3, where (a) shows the valve closed state and (b) shows the valve open state. [Diagram 5] FIG. 4 is an explanatory diagram (a bottom view corresponding to FIG. 2(c)) of a modified example of the rotary tool insertion portion of the first embodiment. [Figure 6] 1(b) is a bottom view corresponding to FIG. 1(b); FIG. 1(a) is a vertical cross-sectional view of a bleed flow passage according to a first modified example of the first embodiment; FIG. [Figure 7] 7A and 7B are explanatory diagrams of a bleed flow path modification 2 of the first embodiment, in which (a) is an enlarged cross-sectional view corresponding to FIG. 4A, (b) is a bottom view of the main body and the valve seat portion as viewed from the direction of arrow VIIb shown in (a), and (c) is a downward perspective view of the valve seat portion shown in (a). [Figure 8] FIG. 4 is an explanatory diagram of a bleed flow passage modification 3 of the first embodiment (a bottom view corresponding to FIG. 2(a)). [Figure 9] FIG. 6 is a vertical sectional view showing a pressure regulating valve according to a second embodiment. [Figure 10] 10A, 10B, and 10C are explanatory views of the valve seat portion shown in FIG. 9, in which (a) is a bottom perspective view, (b) is a side view, and (c) is a bottom view. [Figure 11] 10 is a cross-sectional view showing a state in which the pressure regulating valve shown in FIG. 9 is attached to a piping block. [Figure 12] FIG. 1 is a cross-sectional view showing a pressure regulating valve according to a conventional technique. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] An embodiment of the present invention will be described in detail with reference to Figures 1 to 11. However, the present invention is not limited to this embodiment.

[0021] <Terminology> In the present specification and claims, the terms "left", "right", "upper" and "lower" refer to the directions shown in Figs. 1, 2(b), 3, 4, 6(a), 7(a), 9, 10(b) and 11. In the present specification and claims, the terms "one end" and "other end" refer to the "lower end" and "upper end" in the drawings. In the present specification and claims, the term "effective pressure-receiving area of ​​the pressure-sensing bellows" refers to the pressure-receiving area as an approximate value calculated based on the average diameter of the minimum inner diameter of the bellows shape (the inner diameter of the "valley" part of the bellows shape that protrudes toward the central axis of the pressure-sensing bellows) and the maximum outer diameter (the outer diameter of the "peak" part of the bellows shape that protrudes in a direction away from the central axis of the pressure-sensing bellows). In the present specification and claims, the term "position adjustment part" refers to a "configuration that can change the relative position of the valve seat part and the main body in the axial direction."

[0022] (First embodiment) <About the pressure regulating valve configuration> A pressure regulating valve 100a according to a first embodiment of the present invention will be described with reference to Figures 1 and 2. The pressure regulating valve 100a is mainly composed of a valve body 10, a valve element 20, a slide unit 30, an adjusting spring unit 40, a pressure-sensing bellows unit 50, and an elastic member 70. Each component of the pressure regulating valve 100a will be described in order below. A high primary pressure P1 is introduced into the primary port 1A, while a low secondary pressure P2 is introduced into the secondary port 1B.

[0023] Here, although details will be described later, the pressure regulating valve 100a of the first embodiment has a main body 11 and a valve seat portion 12 as separate bodies, and an adjustment screw portion 42, which is a position adjustment portion, has a configuration that allows the relative position of the valve seat portion 12 and the main body 11 in the axial L direction to be displaced, thereby resolving the conventional problem 1 (large installation space) and the conventional problem 2 (inapplicability to piping blocks) and also simplifying the installation operation itself.

[0024] The valve body 10 is made of a metal such as stainless steel or aluminum, and comprises a main body 11 having a cylindrical shape with a bottom, and a valve seat portion 12 that is formed separately from the main body 11 and has an approximately cylindrical shape.

[0025] The main body 11 defines an accommodation chamber A therein, and has a side wall with a plurality of (e.g., four) horizontal holes 11a that are evenly arranged in the circumferential direction as viewed from the direction of the axis L and define the secondary side port 1B. In addition, an opening 11o that is coaxial with the axis L is formed in the other end 11u of the main body 11.

[0026] The valve seat portion 12 includes an annular valve seat 12a and an inner circumferential surface 12b that defines the primary side port 1A.

[0027] The valve body 20 is made of a metal such as stainless steel or phosphorus bronze and has a generally circular disk shape. The valve body 20 includes an annular valve portion 21 and a boss portion 22 that protrudes coaxially with the axis L from one end side.

[0028] The valve portion has an outer diameter larger than the valve seat 12a, and is seated on or separated from the valve seat 12a by moving in the direction of the axis L. The boss portion 22 fits into the opening of the elastic member .

[0029] The slide unit 30 includes a cylindrical cylinder member 31 fixed to the valve body 20 at one end, a connecting member 32 abutted against a fixing metal fitting 52 at the other end by the biasing force of a valve spring 41, and a piston member 33 whose other end is fixed to the connecting member 32 by crimping and supported so as to be movable forward and backward relative to the cylinder member 31, and is provided inside the pressure-sensing bellows 51. Here, the valve spring 41 is sandwiched in a pressed state between the cylinder member 31 and the connecting member 32. Thus, the slide unit 30 transmits the biasing force of the valve spring 41 to the pressure-sensing bellows 51, thereby biasing the pressure-sensing bellows 51 in the expansion direction along the axis L.

[0030] The adjustment spring unit 40 includes a valve spring 41 (urging means) which is a compression spring, and an adjustment screw portion 42 which is a position adjustment portion that expands and contracts the valve spring 41 and the pressure-sensing bellows 51 to adjust the urging force applied to the valve body 20. The adjustment screw portion 42 which is the position adjustment portion will be described in detail later.

[0031] The pressure-sensing bellows unit 50 is made of a metal such as stainless steel or phosphorus bronze, and includes a pressure-sensing bellows 51 (urging means) formed by press molding into a bellows shape extending in the axial direction L, and a fixing bracket 52 having an approximately circular plate shape.

[0032] One end of the pressure-sensing bellows 51 is welded to the other end surface of the outer periphery of the valve body 20, and the other end is welded to one end surface of the outer periphery of the fixing metal fitting 52, so that the inside is sealed.

[0033] Here, the effective pressure-receiving area of ​​the pressure-sensing bellows 51 is set to be equal to the pressure-receiving area of ​​the valve element 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 element 20 due to the secondary pressure P2 cancel each other out. Therefore, the valve element 20 is not affected by the secondary pressure P2, and the opening degree of the valve element 20 can be variably controlled in response to fluctuations in the primary pressure P1. Note that the dimensions of each part of the pressure regulating valve 100a can be set using the actual pressure-receiving area obtained through experiments, not limited to the pressure-receiving area (effective pressure-receiving area) as an approximation calculated based on the average inner diameter of the minimum and maximum inner diameters of the bellows shape.

[0034] In addition, the fixing bracket 52 has a boss portion 52a that protrudes to the other end side coaxially with the axis L, and this boss portion 52a is fitted into the opening 11o of the main body 11, and then a crimping portion Cr is formed by crimping processing, and the boss portion 52a is fixed to the main body 11.

[0035] The elastic member 70 is made of a metal such as stainless steel or phosphorus bronze, and is formed by pressing a relatively thin elastic member. The elastic member 70 includes a ring-shaped fixing part 71 having an opening on the same axis as the axis L, a plurality of legs 72 connected to the outer periphery of the ring-shaped fixing part 71, extending toward one end in the direction of the axis L, and arranged on the same circumference as viewed from the direction of the axis L (eight legs 72 are arranged at equal intervals on the same circumference in this example), and a curved part 73 formed between one end side and the other end side of the legs 72 and having a convex shape with respect to the inner circumferential surface 12b of the valve seat part 12. After the boss part 22 is fitted into the opening of the elastic member 70, the elastic member 70 is joined to the valve body 20 via a welded part (not shown) by spot welding or the like. Since the curved portion 73 has a convex shape relative to the inner circumferential surface 12b of the valve seat portion 12, the curved portion 73 comes into sliding contact with the inner circumferential surface 12b of the valve seat portion 12 in approximately point contact.

[0036] <Details about the position adjustment part> As described above, in the conventional pressure regulating valve, as shown in FIG. 12, the biasing force of the valve spring 1241 and the pressure-sensing bellows 1251 was adjusted at the other end of the valve spring 1241 and the pressure-sensing bellows 1251 by the adjustment screw member 1242, which is a position adjustment part, and therefore, the conventional problem 1 (large installation space) was present.

[0037] In addition, conventional pressure regulating valves were connected to the primary and secondary piping via a relatively large diameter flange or the like, which resulted in problem 2 (inapplicability to piping blocks).

[0038] In response to this, the inventor, through extensive research, came up with the idea of ​​revising the arrangement of the position adjustment part, in other words, configuring the position adjustment part so that the relative position of the valve seat part 12 and the main body 11 in the direction of the axis L can be displaced, as a solution to conventional problem 1 (large installation space) and conventional problem 2 (inapplicability to piping blocks).

[0039] In the pressure regulating valve 100a of the first embodiment, the main body 11 and the valve seat portion 12 are separate, and an adjustment screw portion 42, which is an example of a position adjustment portion, is provided on each of the main body 11 and the valve seat portion 12. That is, in the pressure regulating valve 100a of the first embodiment, the adjustment screw portion 42 adjusts the biasing force of the valve spring 41 and the pressure-sensing bellows 51, so that the adjustment screw member adopted in the conventional pressure regulating valve is unnecessary, that is, miniaturization is possible, and the conventional problem 1 (large installation space) can be solved. In addition, in the pressure regulating valve 100a of the first embodiment, by adopting a one-cartridge type in which all the components are accommodated in the main body 11, the conventional problem 2 (inapplicability to piping blocks) can be solved and the installation operation itself can be simplified. In addition, in the pressure regulating valve 100a of the first embodiment, the valve seat portion 12, which requires a relatively high dimensional accuracy, is separated from the main body 11, which makes it easier to process.

[0040] Specifically, the adjustment screw portion 42 is composed of a body-side adjustment screw portion 42a formed on the inner circumferential surface of one end of the body 11 and a valve seat-side adjustment screw portion 42b formed on the outer circumferential surface of the valve seat portion 12, which are screwed together. As a result, the other end side of the valve spring 41 and the pressure-sensing bellows 51 only need to be structured to be fixed to the body 11, and therefore the structure of the other end side of the body 11 in particular can be greatly simplified, and as a result, a one-cartridge type can be achieved in which all of the structure is housed within the body 11 having a bottomed cylindrical shape.

[0041] <Variations of position adjustment parts> Here, in the pressure regulating valve 100a of the first embodiment, the adjustment screw portion 42 is adopted as the position adjustment portion, but this is not limited thereto. As defined in the above <Terminology>, the "position adjustment portion" is "a configuration capable of displacing the relative axial position of the valve seat portion and the main body". Therefore, any configuration may be adopted as the position adjustment portion as long as it is a configuration capable of displacing the relative axial position of the valve seat portion and the main body. Here, as an example of the position adjustment portion, a configuration adopting a slide portion (not shown) will be described.

[0042] The slide portion is composed of an outer peripheral surface of one end of the valve seat portion 12 having a cylindrical shape, and an inner peripheral surface of one end of the main body 11 (hereinafter referred to as "slide surface"). The opposing slide surfaces having a cylindrical shape are set coaxially with each other, and the gap between the slide surfaces is appropriately managed to reduce the sliding resistance at the time of contact to a predetermined value. As a result, when the slide surfaces contact each other, the inclination with respect to the axis L direction is suppressed, and while the coaxiality is ensured, one slide surface is guided by the other slide surface and can slide in the axis L direction. Furthermore, a groove may be provided on the slide surface of the valve seat portion 12. In addition, the groove may have a linear shape extending in the axis L direction at the other end, and a spiral shape continuing from the linear shape at the one end. As a result, the valve seat portion 12 can be slid in the direction of axis L relative to the main body 11 to the desired adjustment position, and then the valve seat portion 12 can be rotated relative to the main body 11 to engage and fix it, thereby allowing the position to be adjusted.

[0043] Therefore, even if a slide portion is used as the position adjustment portion, it is possible to solve the conventional problem 1 (large installation space) and the conventional problem 2 (inapplicability to piping blocks).

[0044] <Addressing concerns> In addition, in a calibration process of the valve opening pressure before shipping, a conventional pressure regulating valve is fluidly connected to a performance measuring device, and while a fluid such as air is flowing from the primary port, the secondary pressure is measured, and an adjustment screw member is rotated using an adjustment jig extending into the secondary port to adjust the valve opening pressure so that a predetermined pressure is achieved at a predetermined flow rate. However, with conventional pressure regulating valves, the secondary pressure that serves as the reference when setting the valve opening pressure varies depending on the adjustment jig placed in the secondary port, and this has led to concerns about variations in the valve opening pressure setting (hereinafter referred to as "concern (variation in valve opening pressure setting)").

[0045] <Regarding the biasing force adjustment means> First, the valve seat portion 12 of the first embodiment further includes a flange portion 12c provided on one end side of the adjustment screw portion 42, and a pair of rotary tool insertion portions 12d formed on one end surface of the flange portion 12c and arranged at symmetrical positions across the axis L. The pair of rotary tool insertion portions 12d have a pair of circular holes (so-called crab holes) and are arranged on the outer periphery of the primary side port 1A as viewed from the direction of the axis L, as shown in Fig. 1(b) and Figs. 2(a) and (c). Here, the shape of an adjustment jig (not shown) engaged with the pair of rotary tool insertion portions 12d is a pair of cylindrical drivers that can engage with the respective circular holes. Next, the means for adjusting the biasing force applied to the valve body 20 engages an adjustment jig with a pair of rotary tool insertion portions 12d from the primary flow path side, and rotates the valve seat portion 12 relative to the main body 11 via the adjustment screw portion 42, and moves it in the direction of the axis L, thereby adjusting the expansion and contraction of the valve spring 41 and the pressure-sensing bellows 51, i.e., the biasing force applied to the valve body 20.

[0046] Therefore, in the calibration process of the valve opening pressure before shipment, the pressure regulating valve 100a of the first embodiment is connected to a performance measuring device in the same manner as the conventional pressure regulating valve, and the secondary pressure is measured while a fluid such as air is flowing from the primary port, and the valve opening pressure is adjusted by the biasing force adjusting means via the adjustment screw portion 42 so that the valve opening pressure becomes a predetermined pressure at a predetermined flow rate. At this time, since the pair of rotary tool insertion portions 12d are present in a stagnation region on the outer periphery side of the primary port 1A, which is separated from the main flow path of the fluid, the adjustment jig is also similarly placed in the stagnation region. Therefore, the pressure regulating valve 100a of the first embodiment can suppress the biasing force adjusting means from affecting the fluid being measured, and even if the valve opening pressure is adjusted from the primary flow path side, the primary pressure is relatively stable and the effect on the secondary pressure can be suppressed, so that the concern (variation in the valve opening pressure set value) can be eliminated and the valve opening pressure set value can be adjusted with higher accuracy.

[0047] <Regarding the biasing force fixing means> After adjusting the biasing force applied to the valve element 20 by the biasing force adjusting means so that the valve opens at the valve opening pressure set value, the valve seat 12 is fixed to the main body 11 with the valve element 20 biased against the valve seat 12, that is, one end side of the valve seat 12 and the main body 11 are fixed to each other by welding or the like. At this time, a welded portion W provided by the biasing force fixing means is provided annularly without any gap between the outer peripheral surface of the flange portion 12c of the valve seat 12 and the inner peripheral surface of the main body 11 as viewed from the direction of the axis L, so that a bleed flow path that constantly communicates between the primary side port 1A and the secondary side port 1B is not formed through the gap between the valve seat 12 and the main body 11.

[0048] This welded portion W more securely fixes the adjustment screw portion 42, thereby reliably preventing the adjustment screw portion 42 from loosening due to vibrations or shocks from the external environment and causing a change in the valve-opening pressure set value.

[0049] <Installation of pressure regulating valve> First, the shapes of the main body 11 and the piping block B will be described with reference to FIG.

[0050] The main body 11 is formed with a large diameter portion 11l, a central portion 11c (reduced diameter portion), and a small diameter portion 11s, the outer diameter of which gradually decreases from one end portion 11d to the other end portion 11u along the axis L. Here, a constricted portion 11n that is continuously connected to the large diameter portion 11l and the central portion 11c is formed. In addition, a male screw portion 11scm that is screwed into the block member B is formed on the outer peripheral surface of the other end side of the central portion 11c.

[0051] Next, the piping block B has an insertion hole along the axis L direction, and a primary side flow passage Fp1 and an annular groove Ga are formed on one end side of the insertion hole. Here, the inner diameter of the primary side flow passage Fp1 is set to be slightly larger than the outer diameter of the large diameter portion 11l of the main body 11. A secondary side flow passage Fp2 formed in a direction perpendicular to the axis L direction is connected to the annular groove Ga. In addition, a plurality of annular step portions are formed in the insertion hole along the axis L direction, the diameter of which is successively reduced in a step-like manner from the annular groove Ga to the other end side. In the plurality of annular step portions, a first housing groove G1, a second housing groove G2, a third housing groove G3, and a fourth housing groove G4 are formed in this order. Furthermore, an annular seal groove Gi in which an O-ring Or is accommodated is formed on the other end side of the primary side flow passage Fp1. In addition, a female thread screwing portion Bscf is formed on the inner peripheral surface of the second housing groove G2.

[0052] In the first embodiment, the respective shapes of the main body 11 and the piping block B as shown in FIG. 3 have been described. However, this is merely an example, and any shape may be used as long as the piping block B has an insertion hole and the main body 11 has an external shape that allows it to be inserted into this insertion hole.

[0053] <About installation> The mounting operation of the pressure regulating valve 100a to the piping block B will be described. The pressure regulating valve 100a is inserted from one end side of the primary side flow passage Fp1 along the axis L direction of the piping block B. Then, while screwing the male threaded portion 11scm of the main body 11 into the female threaded portion Bscf of the block member B, the main body 11 is moved toward the other end side in the axis L direction until the other end 11u of the main body 11 abuts against the piping block B. In this mounted state of the pressure regulating valve 100a, the primary side port 1A defined by the valve seat portion 12 communicates with the primary side flow passage Fp1 to which the primary side pressure P1 is introduced, and the secondary side port 1B defined by the horizontal hole 11a of the main body 11 communicates with the secondary side flow passage Fp2 to which the secondary side pressure P2 is introduced. At this time, an O-ring Or is sandwiched between the large diameter portion 11l of the main body 11 and the annular seal groove Gi to seal the gap between the main body 11 and the piping block B. Furthermore, the crimped portion Cr of the fixing metal fitting 52 is accommodated in the fourth accommodating groove G4, and therefore interference with the piping block B is prevented.

[0054] In this way, in the first embodiment, the adjustment screw portion 42, which is the position adjustment portion, is composed of the main body side adjustment screw portion 42a and the valve seat side adjustment screw portion 42b, and by significantly simplifying the configuration on the other end side of the main body 11, it is possible to make a one-cartridge type in which all components are contained within the main body 11, which has a bottomed cylindrical shape, thereby eliminating the conventional problem 2 (inapplicability to piping blocks) and simplifying the installation operation itself.

[0055] In the mounting state of the pressure regulating valve 100a of the first embodiment, as shown in Fig. 3, any one of the secondary side ports 1B is arranged to face the secondary side flow passage Fp2, but this is not limited thereto. For example, the secondary side ports 1B are arranged uniformly in the circumferential direction in a plurality of numbers (for example, four), and an annular groove Ga is interposed between the secondary side port 1B and the secondary side flow passage Fp2, so that the fluid from the plurality of secondary side ports 1B can smoothly flow to the secondary side flow passage Fp2 via the circumferential flow along the annular groove Ga. Therefore, it is also possible that none of the secondary side ports 1B is arranged to face the secondary side flow passage Fp2. In addition, in the first embodiment, the piping block B is formed with an annular groove Ga, but this is not limited thereto. For example, the piping block B may not have an annular groove Ga. In this case, an annular space is formed around the lateral hole 11a formed in the central portion 11c due to the difference in outer diameter between the large diameter portion 11l and the central portion 11c (reduced diameter portion). As a result, similar to the case where the annular groove Ga is provided, the fluid from the multiple secondary side ports 1B can flow smoothly into the secondary side flow path Fp2 via a circumferential flow along this annular space.

[0056] <Operation of the pressure regulating valve> The operation of the pressure regulating valve 100a will be described with reference to Fig. 4. Here, in the pressure regulating valve 100a, a high primary pressure P1 is introduced to the primary port 1A, and a low secondary pressure P2 is introduced to the secondary port 1B. Here, the multiple curved portions 73 of the elastic member 70 are pressed by the radially outward elastic force of the multiple leg portions 72, and therefore have a sliding resistance against the inner circumferential surface 12b of the valve seat portion 12.

[0057] First, the pressure regulating valve 100a in the valve closed state will be described with reference to Fig. 4(a). When the pressure at the primary side port 1A increases, 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 this valve opening force exceeds the combined force of the biasing forces of the pressure-sensing bellows 51 and the valve spring 41 and the sliding resistance at the curved portion 73 of the elastic member 70.

[0058] Next, the pressure regulating valve 100a in the valve open state will be described with reference to Fig. 4(b). When the pressure at the primary side port 1A further increases and the valve opening force acting on the valve element 20 exceeds the combined force of the biasing force of the pressure-sensing bellows 51 and the valve spring 41 and the sliding resistance at the curved portion 73 of the elastic member 70, the valve element 20 leaves the valve seat 12a and the fluid flows from the primary side port 1A to the secondary side port 1B.

[0059] Furthermore, when the pressure at the primary side port 1A decreases, the valve opening force acting on the valve body 20 falls below the combined force of the biasing forces of the pressure-sensing bellows 51 and the valve spring 41 and the sliding resistance at the curved portion 73 of the elastic member 70, and the valve body 20 again seats on the valve seat 12a.

[0060] As described above, in the pressure regulating valve 100a of the first embodiment, the body 11 and the valve seat portion 12 are separate, and the adjusting screw portion 42, which is a position adjusting portion, is provided on each of the body 11 and the valve seat portion 12, thereby solving the conventional problem 1 (large installation space). In addition, in the pressure regulating valve 100a of the first embodiment, the one-cartridge type in which all components are accommodated in the body 11 solves the conventional problem 2 (inapplicability to piping blocks) and simplifies the installation operation itself. Furthermore, in the pressure regulating valve 100a of the first embodiment, the pair of rotary tool insertion portions 12d are disposed on the outer periphery side of the primary side port 1A, i.e., in the stagnation region, as viewed from the axis L direction, thereby preventing the biasing force adjustment means from affecting the fluid being measured, thereby solving the concern (variation in the valve opening pressure setting value) and allowing the valve opening pressure setting value to be adjusted with higher accuracy.

[0061] (Modification of the rotary tool insertion portion of the first embodiment) A pressure regulating valve 100b in a modified rotary tool inserting portion of the first embodiment will be described with reference to Fig. 5. The pressure regulating valve 100b in the modified rotary tool inserting portion of the first embodiment differs from the pressure regulating valve 100a in the first embodiment in that a pair of rotary tool inserting portions 12Bd have a groove shape, but the other configurations are the same as those of the first embodiment. Here, the same components are denoted by the same reference numerals, and duplicated descriptions will be omitted.

[0062] <Regarding the issue of concern (the screw connection of the adjustment screw in an eccentric state)> Here, with reference to FIG. 2, concerns arising from the adoption of the biasing force adjustment means will be described.

[0063] In the adjustment screw portion 42, a predetermined screwing gap is provided between the main body side adjustment screw portion 42a and the valve seat side adjustment screw portion 42b to enable screwing. Here, if the positional accuracy of the pair of rotary tool insertion portions 12d formed in the valve seat portion 12 relative to the axis L (see FIG. 2(c)) or the mounting positional accuracy of the adjustment jig is low, there is a concern that the screwing of the adjustment screw portion 42 will be performed in an eccentric state (hereinafter, referred to as "concern (screwing of the adjustment screw portion in an eccentric state)"). In this case, there is a risk that the adjustment screw portion 42 will not be able to move smoothly in the direction of the axis L due to biting caused by partial contact, or that the upper surface of the valve seat 12a after adjustment will be inclined from a plane perpendicular to the axis L, resulting in valve leakage.

[0064] <Regarding the biasing force adjustment means> In contrast, the valve seat portion 12B in the modified rotary tool insert portion of the first embodiment has a flange portion 12Bc provided on one end side of the adjustment screw portion 42, and a pair of rotary tool insert portions 12Bd formed on one end surface of the flange portion 12Bc and arranged at symmetrical positions with respect to the axis line L, as shown in FIG. 5. The pair of rotary tool insert portions 12Bd are formed at symmetrical positions with respect to the axis line L along a straight line perpendicular to the axis line L, and have a pair of flat-head grooves that open radially inward and close radially outward. The pair of rotary tool insert portions 12Bd are arranged on the outer periphery side of the primary side port 1A as viewed from the axis line L direction, similar to the pair of rotary tool insert portions 12d of the first embodiment. The shape of an adjustment jig (not shown) engaged with the pair of rotary tool insert portions 12Bd is a pair of flat-head screwdrivers that can be loosely fitted in a direction along the respective flat-head grooves.

[0065] As a result, when the adjustment jig is engaged with the pair of rotary tool insertion portions 12Bd from the primary flow path side, it is possible to quickly align the adjustment jig in the direction perpendicular to the line connecting the pair of minus grooves as viewed from the axis L, and it is possible to absorb eccentricity errors in the direction connecting the pair of minus grooves. Therefore, it is possible to smoothly and reliably screw-couple the adjustment screw portion 42, which eliminates the concern (screw-couple the adjustment screw portion in an eccentric state), and it is possible to prevent valve leakage because the inclination of the upper surface of the valve seat 12a after adjustment is eliminated.

[0066] As described above, in the pressure regulating valve 100b in the modified rotary tool inserting portion of the first embodiment, similarly to the first embodiment, the conventional problems 1 and 2 (large installation space, inapplicable to piping blocks) and the concern (variation in valve opening pressure setting value) can be eliminated. In addition, in the pressure regulating valve 100b in the modified rotary tool inserting portion of the first embodiment, the shape of the pair of rotary tool inserting portions 12Bd is a pair of minus grooves, so that the adjustment jig can be quickly aligned with the pair of rotary tool inserting portions 12Bd while absorbing eccentricity errors, and the concern (screw engagement of the adjustment screw portion in an eccentric state) can be eliminated. As a result, the screw engagement can be performed smoothly and reliably, and the inclination of the upper surface of the valve seat 12a is eliminated after adjustment, so that valve leakage can be prevented.

[0067] (Bleed flow passage modification 1 of the first embodiment) A pressure regulating valve 100c in bleed flow passage modification 1 of the first embodiment will be described with reference to Fig. 6. The pressure regulating valve 100c in bleed flow passage modification 1 of the first embodiment differs from the pressure regulating valve 100a of the first embodiment in that it has a bleed flow passage (a gap portion GpC where no welded portion WC is provided) that constantly communicates the primary side port 1A and the secondary side port 1B, but the other configurations are the same as those of the first embodiment. Here, the same configurations are denoted by the same reference numerals, and duplicated explanations will be omitted.

[0068] <About the bleed passage> Here, depending on the application, it has been desired that the pressure regulating valve 100a of the first embodiment be provided with a bleed flow path, for example, because it is necessary to incorporate it into a fluid circuit that requires the fluid to flow constantly without being blocked, or because it is necessary to avoid hunting of the valve body 20 caused by the expansion and contraction of the valve spring 41 when the valve is open in an environment where the pressure difference between the primary side pressure P1 and the secondary side pressure P2 is relatively large.

[0069] On the other hand, as shown in FIG. 6(b), in the pressure regulating valve 100c in the first modification of the bleed passage of the first embodiment, when viewed in the axial direction of the axis L, between the outer peripheral surface of the flange portion 12Cc in the valve seat portion 12 and the inner peripheral surface of the insertion hole 11i in the main body 11, a plurality (for example, three) of welding portions WC are evenly arranged in the circumferential direction by the biasing force fixing means. As a result, a plurality of arc-shaped gap portions GpC where no welding portion WC is provided exist between the outer peripheral surface of the flange portion 12Cc in the valve seat portion 12 and the inner peripheral surface of the insertion hole 11i in the main body 11. Further, as described above, the adjusting screw portion 42C (position adjusting portion) has a predetermined screwing gap. Therefore, the pressure regulating valve 100c has, as a bleed passage that always communicates the primary port 1A and the secondary port 1B, a plurality of arc-shaped gap portions GpC and the screwing gap of the adjusting screw portion 42C, so that there is no need to separately prepare an additional configuration or the like, and the bleed passage can be provided relatively easily.

[0070] Here, the flow passage area of the plurality of arc-shaped gap portions GpC is set to be smaller than the flow passage area of the screwing gap in the adjusting screw portion 42C. Thereby, by adjusting the flow passage area of the plurality of arc-shaped gap portions GpC, the bleed flow rate can be set to a desired value. Specifically, as shown in FIG. 6(a), in order to obtain a desired bleed flow rate, the outer diameter D2 of the flange portion 12Cc of the valve seat portion 12 is appropriately made smaller than the inner diameter D1 of the insertion hole 11i of the main body 11, and by controlling the dimensions (D2 < D1), the flow passage area of the plurality of arc-shaped gap portions GpC can be adjusted.

[0071] As described above, in the pressure regulating valve 100c in the bleed flow passage modification 1 of the first embodiment, similarly to the first embodiment, the conventional problems 1 and 2 (large installation space, inapplicable to piping blocks) and concerns (variation in valve opening pressure setting value) can be eliminated. In addition, in the pressure regulating valve 100c in the bleed flow passage modification 1 of the first embodiment, the bleed flow passage is composed of a plurality of arc-shaped gaps GpC and a screw-fitting gap of the adjustment screw portion 42C, so that there is no need to separately prepare additional configurations, and the bleed flow passage can be relatively easily provided depending on the user's application. Furthermore, in the pressure regulating valve 100c in the bleed flow passage modification 1 of the first embodiment, the bleed flow rate can be set to a desired value by adjusting the flow passage area of ​​the plurality of arc-shaped gaps GpC.

[0072] (Modification 2 of the bleed flow passage of the first embodiment) The pressure regulating valve 100d in the bleed passage modification 2 of the first embodiment will be described with reference to Fig. 7. The pressure regulating valve 100d in the bleed passage modification 2 of the first embodiment differs from the pressure regulating valve 100c in the bleed passage modification 1 of the first embodiment in that the flange portion 12Dc has a flange cutout portion 12Dn and has an arc-shaped welded portion WC region, but the other configurations are the same as those of the bleed passage modification 2 of the first embodiment. Here, the same configurations are denoted by the same reference numerals, and duplicated explanations will be omitted.

[0073] <About the bleed passage> As shown in Fig. 7(b) and (c), the pressure regulating valve 100d in the bleed flow passage modification 2 of the first embodiment has a flange cutout portion 12Dn on a part of the outer circumferential edge of the flange portion 12Dc in the valve seat portion 12D. Also, as shown in Fig. 7(b), a welded portion WD provided by the biasing force fixing means is provided in an arc shape without any gap between the outer circumferential surface of the flange portion 12Dc in the valve seat portion 12D, not including the flange cutout portion 12Dn, and the inner circumferential surface of the main body 11, as viewed from the axis L direction. As a result, a half-moon-shaped gap portion GpD exists in the gap between the outer circumferential surface of the flange cutout portion 12Dn and the inner circumferential surface of the main body 11. Therefore, the pressure regulating valve 100d has a crescent-shaped gap portion GpD and a threaded gap of the adjustment screw portion 42D (position adjustment portion) as a bleed flow path Bc (see Figure 7(a)) that constantly connects the primary side port 1A and the secondary side port 1B, so that there is no need to prepare any additional components separately, and the bleed flow path Bc can be provided relatively easily.

[0074] Here, the flow area of ​​the half-moon gap GpD is set to be smaller than the flow area of ​​the screw gap in the adjustment screw portion 42D. As a result, the bleed flow rate can be set to a desired value by adjusting the flow area of ​​the half-moon gap GpD. Specifically, as shown in FIG. 7(b), the flow area of ​​the half-moon gap GpD can be adjusted by controlling the dimensions of the flange cutout portion 12Dn so as to obtain a desired bleed flow rate. Note that the welded portion WD in the bleed flow path modification 2 of the first embodiment has a larger welded area than the welded portion WC in the bleed flow path modification 1 of the first embodiment, and therefore it is possible to reliably prevent the adjustment screw portion 42D from loosening due to vibrations or impacts from the external environment and a change in the valve opening pressure setting value.

[0075] As described above, in the pressure regulating valve 100d in the bleed flow passage modification 2 of the first embodiment, similar to the bleed flow passage modification 1 of the first embodiment, the conventional problems 1 and 2 (large installation space, inapplicability to piping blocks) and concerns (variation in the valve opening pressure set value) can be resolved. In addition, in the pressure regulating valve 100d in the bleed flow passage modification 2 of the first embodiment, similar to the bleed flow passage modification 1 of the first embodiment, the bleed flow passage Bc is composed of the crescent-shaped gap GpD and the screwing gap of the adjustment screw portion 42D, so that there is no need to separately prepare additional configurations, and the bleed flow passage can be relatively easily provided depending on the user's application. Furthermore, the bleed flow rate can be set to a desired value by adjusting the flow passage area of ​​the crescent-shaped gap GpD. In addition, since the welded portion WD in the bleed flow passage modification 2 of the first embodiment has a larger welded area than the welded portion WC in the bleed flow passage modification 1 of the first embodiment, it is possible to reliably prevent the valve opening pressure set value from changing due to loosening of the adjustment screw portion 42D.

[0076] (Variation 3 of the bleed flow passage of the first embodiment) A pressure regulating valve 100e in the bleed passage modification 3 of the first embodiment will be described with reference to Fig. 8. The pressure regulating valve 100e in the bleed passage modification 3 of the first embodiment differs from the pressure regulating valves 100c, 100d in the bleed passage modifications 1 and 2 of the first embodiment in that a thread notch portion 42En is formed in the valve seat portion side adjustment screw portion 42Eb as a thread engagement gap of the adjustment screw portion 42E (position adjustment portion), but the other configurations are the same as those of the bleed passage modifications 1 and 2 of the first embodiment. Here, the same configurations are denoted by the same reference numerals, and duplicated explanations will be omitted.

[0077] <About the bleed passage> 8, the pressure regulating valve 100e in the bleed flow path modification 3 of the first embodiment has a thread notch portion 42En extending in the axial direction L formed in the valve seat portion side adjusting screw portion 42Eb as a thread engagement gap of the adjusting screw portion 42E. As a result, the thread engagement gap is formed in the gap between the thread notch portion 42En and the adjusting screw portion 42E facing the thread notch portion 42En.

[0078] By employing the thread cutout portion 42En in the bleed flow passage modification 3 of the first embodiment in the adjusting screw portions 42C, 42D in the bleed flow passage modifications 1 and 2 of the first embodiment, respectively, it is possible to increase the flow area of ​​the screw gaps in the adjusting screw portions 42C, 42D. This allows the flow area of ​​the arc-shaped gaps GpC (see FIG. 6(b)) and the flow area of ​​the crescent-shaped gap GpD (see FIG. 7(b)) to be reliably set smaller than the flow area of ​​the screw gaps in the adjusting screw portions 42C, 42D, so that a desired bleed flow rate can be obtained by controlling the dimensions of the arc-shaped gaps GpC and the flange cutout portion 12Dn.

[0079] In the bleed passage modification 3 of the first embodiment, the thread cutout portion 42En is provided at only one location, but the present invention is not limited to this, and may be provided at multiple locations. In the bleed passage modification 3 of the first embodiment, the circumferential width of the thread cutout portion 42En is relatively small, but the present invention is not limited to this, and may be, for example, relatively large, as long as it functions as a screw connection. In the bleed passage modification 3 of the first embodiment, the thread cutout portion 42En is formed in the valve seat side adjustment screw portion 42Eb, but the present invention is not limited to this, and may be, for example, in the body side adjustment screw portion 42a.

[0080] As described above, the pressure regulating valve 100e in the bleed flow path modification 3 of the first embodiment can solve the conventional problems 1 and 2 (large installation space, inapplicability to piping blocks) and concerns (variation in valve opening pressure set value) in the same way as the bleed flow path modifications 1 and 2 of the first embodiment. Also, in the pressure regulating valve 100e in the bleed flow path modification 3 of the first embodiment, like the bleed flow path modifications 1 and 2 of the first embodiment, the bleed flow path is composed of the gaps GpC and GpD and the screw-fitting gaps of the adjustment screw portions 42C and 42D, so there is no need to separately prepare additional components, and the bleed flow path can be provided relatively easily depending on the user's application. Furthermore, in the pressure regulating valve 100e in the bleed flow passage modified example 3 of the first embodiment, by employing the thread cutout portion 42En in each of the adjusting screw portions 42C, 42D in the bleed flow passage modified examples 1 and 2 of the first embodiment, the flow passage area of ​​the gaps GpC, GpD can be reliably set smaller than the flow passage area of ​​the screwing gaps in the adjusting screw portions 42C, 42D. Therefore, by controlling the dimensions of the multiple arc-shaped gaps GpC and the flange cutout portion 12Dn, a desired bleed flow rate can be obtained.

[0081] Second embodiment A pressure regulating valve 100f according to a second embodiment will be described with reference to FIG. 9. The pressure regulating valve 100f according to the second embodiment differs from the pressure regulating valve 100a according to the first embodiment in that the biasing force fixing means has a different configuration and the pressure regulating valve 100f has a piping block sealing means, but the other configurations are substantially the same as those of the pressure regulating valve 100a according to the first embodiment. Here, the same configurations are given the same reference numerals, and duplicated explanations will be omitted. The pressure regulating valve 100f according to the second embodiment does not have a bleed flow path.

[0082] Here, as shown in FIG. 3, in the first embodiment, the gap between the pressure regulating valve 100a and the piping block B is sealed by clamping an O-ring Or between the large diameter portion 11l of the main body 11 and the annular seal groove Gi when the pressure regulating valve 100a is attached to the piping block B. When performing this attachment operation, it was necessary to first accommodate the O-ring Or in the annular seal groove Gi, and then insert the main body 11 into this O-ring Or a relatively long distance. Therefore, before the O-ring Or is pressed against the large diameter portion 11l of the main body 11 and is in a sealed state, it slides against other parts of the main body 11 and is separated from the annular seal groove Gi, and there was a risk that the desired sealed state would not be achieved. In addition, it was necessary to carefully attach the pressure regulating valve 100a to the piping block B so that the O-ring Or is arranged in a desired sealed state, and an improvement was desired.

[0083] In contrast, as described in detail below, in the pressure regulating valve 100f of the second embodiment, the main body 11F and the valve seat portion 12F are separate bodies as in the first embodiment, and the adjusting screw portion 42 is provided on each of the main body 11F and the valve seat portion 12F, thereby solving the conventional problem 1 (large installation space). Also, in the pressure regulating valve 100f of the second embodiment, all components are housed within the main body 11F, and by having a piping block sealing means, a one-cartridge type that can be installed with one action can be used, and as a result, the conventional problem 2 (inapplicability to piping blocks) is solved, and the installation operation itself can be made quicker and easier.

[0084] <Variations of position adjustment parts> Here, in the pressure regulating valve 100f of the second embodiment, as in the first embodiment, the adjustment screw portion 42 is used as the position adjustment portion, but the present invention is not limited to this, and any configuration may be used as long as it is "a configuration that allows the relative position of the valve seat portion and the main body in the axial direction to be displaced." Here, as an example of the position adjustment portion, a configuration that uses a slide portion (not shown) will be described.

[0085] The slide portion is composed of an outer peripheral surface at one end of the valve seat portion 12F having a cylindrical shape, and an inner peripheral surface at one end of the main body 11F (hereinafter referred to as "slide surface"). The opposing slide surfaces having a cylindrical shape are set coaxially with each other, and the gap between the slide surfaces is appropriately managed to reduce the sliding resistance at the time of contact to a predetermined value. As a result, when the slide surfaces contact each other, the inclination with respect to the axis L direction is suppressed, and while the coaxiality is ensured, one slide surface is guided by the other slide surface and can slide in the axis L direction. Furthermore, a groove may be provided on the slide surface of the valve seat portion 12F. In addition, the groove may have a linear shape extending in the axis L direction at the other end, and a spiral shape continuing from the linear shape at the one end. As a result, the valve seat portion 12F can be slid in the direction of axis L relative to the main body 11F to a desired adjustment position, and then the valve seat portion 12F can be rotated relative to the main body 11F to engage and fix it, thereby allowing the position to be adjusted.

[0086] Therefore, even if a slide portion is used as the position adjustment portion, it is possible to solve the conventional problem 1 (large installation space) and the conventional problem 2 (inapplicability to piping blocks).

[0087] From here, the biasing force adjusting means, biasing force fixing means, and piping block sealing means in the pressure regulating valve 100f of the second embodiment will be described in order.

[0088] <Regarding the biasing force adjustment means> First, the biasing force adjustment means for the valve body 20 rotates the valve seat portion 12F relative to the main body 11F via the adjustment screw portion 42, and moves it in the direction of the axis L, thereby adjusting the biasing force for the valve body 20. At this time, the valve seat portion 12F is in a state of extending toward one end side from the main body 11F.

[0089] <Regarding the biasing force fixing means> After the biasing force adjustment means adjusts the biasing force on the valve body 20 so that the valve opens at the valve opening pressure setting value, the biasing force fixing means fixes the intermediate portion of the valve seat portion 12F and the one end portion 11d of the main body 11F to each other by welding or the like from the radially outer side. In this case, as will be described in detail later, in the second embodiment, since the piping block seal means is provided on the primary flow path side of the welded portion WF, a bleed flow path that always communicates the primary side port 1A and the secondary side port 1B through a gap between the valve seat portion 12F and the main body 11F is not formed. Therefore, the welded portion WF provided by the biasing force fixing means does not need to be provided annularly without gaps between the outer peripheral surface of the intermediate portion of the valve seat portion 12 and the inner peripheral surface of the one end portion 11d of the main body 11F when viewed from the radially outer side, and may be, for example, evenly arranged in a plurality of positions in the circumferential direction.

[0090] <Pipe block sealing method> As shown in Fig. 10, the valve seat portion 12F includes a flange portion 12Fc provided on one end side of the valve seat portion side adjustment screw portion 42b, and an outer circumferential groove 12Fg provided on the outer circumferential surface of the flange portion 12Fc. Here, a welded portion WF is provided by the biasing force fixing means, and the valve seat portion 12F and the main body 11F are fixed, and then an O-ring Or (sealing member) having an outer diameter larger than that of the flange portion 12Fc is accommodated in the outer circumferential groove 12Fg. Note that, as will be described in detail later, by performing an operation of attaching the pressure regulating valve 100f to the piping block Bf, the O-ring Or is sandwiched between the outer circumferential groove 12Fg and the piping block Bf, and the gap between the valve seat portion 12F and the piping block Bf can be sealed.

[0091] <Installation of pressure regulating valve> First, the shapes of the main body 11F and the piping block Bf will be described with reference to FIG.

[0092] The main body 11F is formed with a large diameter portion 11l and a small diameter portion 11s whose outer diameter gradually decreases from one end 11d to the other end 11u along the direction of the axis L. In addition, a male screw portion 11scm that is screwed into the block member Bf is formed on the outer circumferential surface of the other end side of the large diameter portion 11l.

[0093] Next, the piping block Bf has an insertion hole along the axis L direction, and a primary side flow passage Fp1, an annular fixing groove Gf, and an annular groove Ga are formed on one end side of the insertion hole. Here, the inner diameter of the annular fixing groove Gf is set to be smaller than the inner diameters of the primary side flow passage Fp1 and the annular groove Ga, and slightly larger than the outer diameter of the flange portion 12Fc of the valve seat portion 12F. In addition, a secondary side flow passage Fp2 formed in a direction perpendicular to the axis L direction is connected to this annular groove Ga. Furthermore, in the insertion hole along the axis L direction, a plurality of annular step portions are formed, the diameter of which is successively reduced in a step-like manner from the annular groove Ga to the other end side. In the plurality of annular step portions, a first housing groove G1, a second housing groove G2, a third housing groove G3, and a fourth housing groove G4 are formed in that order. In addition, a female thread screwing portion Bscf is formed on the inner peripheral surface of the second housing groove G2.

[0094] In the second embodiment, the respective shapes of the main body 11F and the piping block Bf as shown in FIG. 11 have been described; however, this is merely one example, and any shape may be used as long as the piping block Bf has an insertion hole and the main body 11F has an external shape that can be inserted into this insertion hole.

[0095] <About installation> The mounting operation of the pressure regulating valve 100f to the piping block Bf will be described. The pressure regulating valve 100f is inserted from one end side of the primary side flow passage Fp1 along the axis L direction of the piping block Bf. Then, while screwing the male threaded portion 11scm of the main body 11F into the female threaded portion Bscf of the block member Bf, the main body 11F is moved toward the other end side in the axis L direction until the other end 11u of the main body 11F abuts against the piping block Bf. At this time, the O-ring Or is first sandwiched between the outer peripheral groove 12Fg of the valve seat portion 12F and the annular fixing groove Gf of the piping block Bf, sealing the gap between the valve seat portion 12F and the piping block Bf. This minimizes the time that the O-ring Or contacts the piping block Bf, and thus prevents the O-ring Or from falling off the outer peripheral groove 12Fg and other positional deviations. In addition, the mounting operation itself can be made quicker and easier by making it a one-action operation.

[0096] As described above, in the pressure regulating valve 100f of the second embodiment, similarly to the first embodiment, the main body 11F and the valve seat portion 12F are separate, and the adjusting screw portion 42 is provided on each of the main body 11F and the valve seat portion 12F, thereby solving the conventional problem 1 (large installation space). Also, in the pressure regulating valve 100f of the second embodiment, all components are accommodated within the main body 11F, and by having a piping block sealing means, a one-cartridge type that can be installed with one action can be used, and as a result, the conventional problem 2 (inapplicability to piping blocks) is solved, and the installation operation itself can be made quicker and easier.

[0097] <Other> It goes without saying that the pressure regulating valves 100a to 100f of the present embodiment can be applied to any fluid device or fluid circuit. Furthermore, the present invention is not limited to the above-mentioned aspects, embodiments, and modified examples, and can be appropriately modified or altered without departing from the technical concept of the present invention. [Explanation of symbols]

[0098] 100a~100f Pressure Regulating Valve 1A Primary Port 1B Secondary port 10,10F Valve body 11,11F Main unit 11a Side Cave 11c Center part (reduced diameter part) 11d One end 11i Insertion hole 11l Large diameter section 11n Neck 11o opening 11s Small diameter section 11scm Male threaded joint 11u other end 12,12B,12C,12D,12E,12F Valve seat 12a Valve seat 12b Inner surface 12c, 12Bc, 12Cc, 12Dc, 12Ec, 12Fc Flange part 12Dn flange cutout 12d, 12Bd Pair of rotary tool inserts 12Fg outer groove 20 Valve body 21 Valve section 22 Boss section 30 Slide unit 31 Cylinder parts 32 Connecting members 33 Piston parts 40 Adjustment spring unit 41 Valve spring (biasing means) 42, 42C, 42D, 42E Adjustment screw part (position adjustment part) 42a Body side adjustment screw 42b, 42Eb Valve seat side adjustment screw 42En Thread notch 50 Pressure-sensing bellows unit 51 Pressure-sensitive bellows (biasing means) 52 Fixture 52a Boss part 70 Elastic member 71 Circular ring fixing part 72 Legs 73 Curved Section A Containment Room B, Bf piping block Bscf female threaded joint Bc Bleed channel Cr Crimping part D1 Inner diameter of the insertion hole of the main body D2 Outer diameter of flange part of valve seat Fp1 Primary flow path Fp2 Secondary flow path G1 First Receiving Groove G2 Second Receiving Groove G3 3rd Receiving Groove G4 4th storage groove Ga Annular groove Gf Circular fixing groove Gi Annular seal groove GpC, GpD gap L axis Or O-ring (sealing material) P1 Primary pressure P2 Secondary pressure W, WC, WD, WF welded parts

Claims

1. A main body having a secondary port; a valve seat portion that is separate from the main body, that is disposed on one end side of the main body, and that has a primary side port and a valve seat; a valve body that moves in an axial direction and seats on or leaves the valve seat; a biasing means for biasing the valve body toward the valve seat; a position adjustment unit capable of adjusting the biasing force of the biasing means; Equipped with The pressure regulating valve, wherein the position adjustment portion is configured to be able to displace a relative position between the valve seat portion and the main body in an axial direction.

2. The position adjustment portion is made of an adjustment screw portion, 2. The pressure regulating valve according to claim 1, wherein the adjusting screw portion is provided on the valve seat portion and the body.

3. The valve seat portion has a pair of rotary tool insertion portions on one end surface, 3. The pressure regulating valve according to claim 2, wherein the pair of rotary tool insertion portions are disposed on an outer circumferential side of the primary side port when viewed in the axial direction.

4. a biasing force adjusting means for axially moving the valve seat portion relative to the main body via the adjustment screw portion; a biasing force fixing means for fixing the valve seat portion to the main body in a state in which the valve body is biased to the valve seat portion by the biasing force adjustment means; The pressure regulating valve of claim 2 further comprising:

5. The valve seat portion extends toward one end side from the main body, 3. The pressure regulating valve according to claim 1, wherein an outer circumferential groove for accommodating a seal member is provided on an outer circumferential surface at one end of the valve seat portion.

6. The valve seat portion has a flange portion on one end side of the adjustment screw portion, When viewed from the axial direction, a welded portion provided by the biasing force fixing means and a gap portion where the welded portion is not provided are provided between an outer peripheral surface of the flange portion and an inner peripheral surface of the main body, 5. The pressure regulating valve according to claim 4, wherein a bleed flow passage that constantly connects the primary side port and the secondary side port is formed by the gap and a threaded gap of the adjusting screw portion.

7. A flange cutout portion is formed on a part of an outer circumferential edge of the flange portion, 7. The pressure regulating valve according to claim 6, wherein the gap is formed in a gap between an outer circumferential surface of the flange cutout portion and an inner circumferential surface of the main body.

8. At least one of the valve seat portion and the adjustment screw portion of the main body is formed with a threaded notch portion extending in an axial direction, 8. The pressure regulating valve according to claim 6, wherein the threaded gap is formed in a gap between the threaded notch portion and the adjusting screw portion facing the threaded notch portion.

9. The body has a reduced diameter portion, 3. The pressure regulating valve according to claim 1, wherein a lateral hole defining a secondary port is formed in the reduced diameter portion.

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