Safety valve

Abstract

A conventional safety valve has a problem of unstable valve opening operation due to increased resistance when the valve is opened, and a countermeasure for solving the problem is sought. This relief valve (10) is provided with: a base part (11) provided with a valve seat (11Z) surrounding a valve hole (13); a valve body (35) having an annular contact section (35D) that comes into contact with the valve seat (11Z); a slide support mechanism (40K) including a shaft fitting part (31) that supports the valve body (35) so as to be linearly movable in the axial direction of the shaft (40); and a seal member (21) that is provided to one of the valve seat (11Z) and the annular contact section (35D), and that is in close contact with the other of the valve seat (11Z) and the annular contact section (35D) as a seal contact section. The slide support mechanism (40K) is provided with gaps (C1, C2) that allow the shaft (40) to be inclined relative to the shaft fitting part (31) and to be in a state in which only a part of the seal contact part in the circumferential direction comes into contact with the seal member (21).

Description

Technical Field

[0001] The present disclosure relates to a safety valve in which a valve body is supported so as to be linearly movable. Background Art

[0002] Conventionally, as this type of safety valve, there is known a safety valve in which a sealing member is provided on one of a valve seat and a valve body, and an annular seal contact portion provided on the other is in close contact with the sealing member (see, for example, Patent Document 1).

[0003] Patent Document 1: Japanese Utility Model Publication No. 6-28991 (refer to Figure 2 )

[0004] However, in the safety valve, there is a situation where the valve is kept closed for a long time and the entire circumference of the seal close contact portion is attached to the sealing member. In this case, in the existing safety valve, there is a problem that the resistance when opening the valve becomes large and the valve opening action is unstable, and a countermeasure is sought. Summary of the invention

[0005] The safety valve disclosed in the present invention comprises: a base portion, which overlaps with the opening edge of the discharge hole of the container and has a valve hole opposite to the above-mentioned discharge hole, and a valve seat surrounding the above-mentioned valve hole; a valve body, which has an annular abutment portion abutting against the above-mentioned valve seat; a sliding support mechanism, which has a shaft provided on one of the above-mentioned valve body and the above-mentioned base portion, and a shaft fitting portion provided on the other side and fitted on the outer side of the above-mentioned shaft, the above-mentioned sliding support mechanism supports the above-mentioned valve body so as to be able to move linearly in the axial direction of the above-mentioned shaft; and a sealing component, which is provided on one of the above-mentioned valve seat or the above-mentioned annular abutment portion, and the other side is in close contact with the above-mentioned sealing component as a sealing close contact portion. In the above-mentioned safety valve, a gap is provided in the above-mentioned sliding support mechanism, and the gap allows the above-mentioned shaft to be relatively tilted with respect to the above-mentioned shaft fitting portion to become a partial abutment state in which only a part of the circumferential direction of the above-mentioned sealing close contact portion abuts against the above-mentioned sealing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a perspective view of the safety valve according to the first embodiment of the present disclosure.

[0007] Figure 2 This is an exploded perspective view of the safety valve.

[0008] Figure 3 It is a three-dimensional diagram of the base.

[0009] Figure 4 It is a top sectional view of the safety valve.

[0010] Figure 5 This is a perspective view of a valve seat sealing component.

[0011] Figure 6 It is a three-dimensional view of the valve body.

[0012] Figure 7 It is a partially enlarged side sectional view of the fixed portion relative to the container wall of the safety valve.

[0013] Figure 8 It is a partially enlarged side sectional view of the safety valve in the closed state.

[0014] Fig. 9 It is a partially enlarged side sectional view of the safety valve in the open state.

[0015] Fig.10 It is a partially enlarged top view of the safety valve.

[0016] Fig.11 It is a partially enlarged side sectional view showing the valve opening action of the safety valve.

[0017] Fig.12 It is a side sectional view of the safety valve.

[0018] Fig.13 It is a plan cross-sectional view of a safety valve according to a second embodiment of the present disclosure.

[0019] Fig.14 It is a plan cross-sectional view of a safety valve according to a third embodiment of the present disclosure.

[0020] Fig.15 It is a side sectional view of the safety valve.

[0021] Fig.16 It is a plan cross-sectional view of a safety valve according to a fourth embodiment of the present disclosure.

[0022] Fig.17 It is a side sectional view of the safety valve.

[0023] Fig.18 It is a side cross-sectional view of an annular contact portion of a safety valve according to a fifth embodiment of the present disclosure.

[0024] Fig.19 It is an enlarged side cross-sectional view of an annular contact portion in a safety valve according to a sixth embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] [First embodiment]

[0026] exist Figures 1 to 12 1 shows a safety valve 10 according to one embodiment of the present disclosure. Figure 1The safety valve 10 shown as a whole is fixed in a manner overlapping the outer surface of the container 90. The container 90 illustrated in this embodiment is, for example, a battery pack for a hybrid vehicle, an electric vehicle, etc., which contains one or more single cells to protect them from water, dust, etc. Moreover, when the container 90 has an unfavorable situation where fluid leaks from the single cell, the safety valve 10 of this embodiment is used to prevent the container 90 from rupturing. In addition, the container 90 is, for example, a rectangular parallelepiped that is flat in the horizontal direction and has a Figure 1 The elongated container wall 91 is partially shown in the middle. The plurality of containers 90 are mounted on the vehicle in a state of being overlapped in the flat direction (in a state of being arranged in the horizontal direction), and the safety valve 10 is mounted on the upper surface of each container 90 .

[0027] To install the safety valve 10, Figure 2 As shown, a discharge hole 92 and a plurality of mounting holes 93 are formed on the container wall 91 on the upper surface of the container 90. The discharge hole 92 is, for example, arranged at the center of the width direction of the container wall 91, and is in an elliptical shape extending along the long side direction of the container wall 91. In addition, a plurality of mounting holes 93 are arranged in pairs on both sides of the discharge hole 92 in the long side direction. More specifically, the plurality of mounting holes 93 converge between a pair of imaginary lines L1 obtained by extending a pair of straight line portions opposing each other in the width direction of the opening edge of the discharge hole 92, and are arranged at positions close to the above-mentioned pair of imaginary lines L1. Moreover, the plurality of mounting holes 93 and the discharge hole 92 are arranged and shaped to be bilaterally symmetrical in both the width direction and the long side direction of the container wall 91.

[0028] Furthermore, in the present embodiment, the container to which the safety valve 10 is to be installed is the container 90, but it is not limited to the battery pack, and any container may be used as long as the internal fluid pressure changes. For example, the shell of an air conditioner that contains the refrigerant as a fluid is also included in the container to which the safety valve 10 is to be installed. In addition, the container may be made of metal or resin. Furthermore, the container may be a rigid body or may not be a rigid body, for example, it may be a bag-shaped container that is easily deformed. In addition, the discharge hole 92 of the present embodiment is elliptical, but the shape of the discharge hole 92 may be any shape, for example, it may be circular, elliptical, polygonal, or an asymmetric irregular shape.

[0029] like Figure 2 As shown in FIG. 1 , the safety valve 10 has a base 11 fixed in a manner overlapping the outer surface (upper surface) of the container wall 91. Figure 2 The “upper side, lower side, side, etc. of the safety valve 10” directions and directions are simply referred to as “upper side, lower side, side, etc. of the safety valve 10” directions and directions, but the directions and directions of the safety valve 10 when in use are arbitrary.

[0030] The base 11 is, for example, a resin molded product, and its planar shape is a rectangular shape with four corners chamfered into arc shapes (i.e., R-chamfered), which serves as a setting space S1 for the safety valve 10. The rectangular shape of the base 11 is one size larger than the rectangular shape of the container wall 91 having a plurality of mounting holes 93 at the four corners.

[0031] In addition, if Figure 3 As shown in FIG. 1 , the base 11 is frame-shaped, and the inner side thereof forms a valve hole 13. The valve hole 13 is shaped, for example, in a rectangular shape having a pair of expansion portions 13A slightly expanded outward at the center of a pair of long sides obtained by chamfering the four corners. Figure 4 As shown, the interval between the pair of expansion portions 13A is the same as the width of the discharge hole 92 , the maximum length of the valve hole 13 is greater than the entire length of the discharge hole 92 , and the opening area of ​​the valve hole 13 is wider than the discharge hole 92 .

[0032] Furthermore, the base 11 may be made of metal, and the planar shape of the base 11 is not limited to a rectangle, and may be a shape other than a circle, an ellipse, or a rectangle, such as a polygon.

[0033] Mounting holes 14 are provided near the chamfered surfaces 13C at the four corners of the valve hole 13. The mounting holes 14 penetrate the base 11 vertically and have internal thread portions 14N on the inner side. Figure 7 As shown, nuts 15 are embedded in the vicinity of the above-mentioned chamfered surfaces 13C in the base 11. That is, the base 11 is an insert-molded product in which a plurality of nuts 15 are embedded. The nut 15 has a flange 15F extending laterally from the upper end, and has a concave-convex shape on the outer peripheral surface. Moreover, the upper surface of the flange 15F and the upper surface of the base 11 (in detail, the upper surface of the annular protrusion 18 described later) are embedded in a state arranged on the same surface. Moreover, the inner surface of the nut 15 becomes the internal thread portion 14N of the mounting hole 14.

[0034] Furthermore, the plurality of mounting holes 14 constitute the "fixing portion" of the base 11 for fixing the base 11 to the container wall 91, and the plurality of bolts B passing through the plurality of mounting holes 93 of the container wall 91 from the inner side of the container 90 are fastened to the internal threaded portions 14N of the plurality of mounting holes 14, thereby fixing the base 11 to the container wall 91. In addition, when the base 11 is fixed to the container wall 91, the inner surfaces of the pair of expansion portions 13A in the valve hole 13 are arranged to be substantially flush with the inner surface of the discharge hole 92, and the pair of inner surfaces of the valve hole 13 that are opposed in the longitudinal direction are arranged at a position away from the discharge hole 92, and the substantially entire discharge hole 92 is opposed to the valve hole 13 (see Figure 4 ).

[0035] Furthermore, the mounting hole 14 has the internal thread portion 14N, but the mounting hole 14 may be a through hole without the internal thread portion 14N. In this case, a bolt passing through the mounting hole 14 may be fastened to a nut overlapping the upper surface of the base 11, or a rivet may be passed through the mounting hole 14 instead of the bolt, and the front end of the rivet may be riveted, and the nut may be fixed coaxially with the mounting hole 93 on the inner surface of the container wall 91, and the bolt inserted into the mounting hole 14 from above may be fastened to the nut. In addition, the "fixing portion" of the base 11 for fixing the base 11 to the container wall 91 may not be a structure through which fasteners such as bolts and rivets pass, and may be a structure in which, for example, a plurality of elastic engaging pieces protrude from the base 11 as the fixing portion, and these elastic engaging pieces engage with the opening edge of the discharge hole 92 of the container wall 91, the opening edge of the mounting hole 93, etc. In addition, the base 11 and the container wall 91 may be fixed by an adhesive material, and the portion of the base 11 coated with the adhesive material may be the "fixing portion" of the base 11.

[0036] like Figure 7 As shown, a lower surface groove 16 is formed on the lower surface of the base 11 to surround the valve hole 13 and the plurality of mounting holes 14. The lower surface groove 16 is, for example, in the shape of a square groove (i.e., a quadrangular cross-sectional shape), and an annular sealing member 17 is accommodated therein. Figure 2 As shown, the annular sealing member 17 is in the shape of a rectangular frame plate as a whole, and is shaped by hollowing out the central part of the inner edge of a pair of long sides, the position close to both ends of the inner edge of a pair of short sides, and the middle part of the outer edge of a pair of short sides, corresponding to the groove 20 of the base 11 described later. In addition, the planar shape of the lower surface groove 16 is the same as the planar shape of the annular sealing member 17. Moreover, in the state before the base 11 is fixed to the container wall 91, a part of the annular sealing member 17 protrudes slightly from the lower surface of the base 11. If the base 11 is fixed to the container wall 91, the annular sealing member 17 is in close contact with the outer surface of the container wall 91 as a whole, and the valve hole 13 is surrounded from the outside of the plurality of mounting holes 14, thereby sealing the base 11 and the container wall 91.

[0037] In addition, the annular sealing member 17 may not be formed in the frame-shaped plate shape as described above, and may be, for example, an O-ring or an adhesive material applied between the base 11 and the container wall 91. In addition, the annular sealing member 17 may be provided to surround the valve hole 13 at a position closer to the inside than the plurality of mounting holes 14, and to seal each mounting hole 14, 93 separately.

[0038] like Figure 3As shown in the figure, on the upper surface of the base 11, a rectangular region having four corners chamfered and having a nut 15 inside the four corners protrudes upward in a step-like manner, thereby forming an annular protrusion 18. And, the rectangular annular region surrounding the annular protrusion 18 serves as a sealing member mounting portion 19.

[0039] The upper surfaces of the annular protrusion 18 and the sealing member mounting portion 19 are flat surfaces parallel to the lower surface of the base 11 , and a step surface 18D between the annular protrusion 18 and the sealing member mounting portion 19 is substantially perpendicular to the upper surfaces of the annular protrusion 18 and the sealing member mounting portion 19 .

[0040] A plurality of grooves 20 are formed at the inner edge of the seal member placement portion 19. Each groove 20 is in the shape of a square groove extending along the inner edge of the seal member placement portion 19. In addition, two grooves 20 are arranged at positions close to both ends of each short side portion of the seal member placement portion 19, and one groove 20 longer than the grooves 20 of the short side portion is arranged at the center of each long side portion of the seal member placement portion 19. In addition, the inner side surface of each groove 20 on the side of the annular protrusion 18 is continuous with the step surface 18D of the annular protrusion 18 in a manner that it is flush with the step surface 18D of the annular protrusion 18.

[0041] like Figure 8 As shown in FIG. 1 , a valve seat sealing member 21 is assembled in the sealing member mounting portion 19. Figure 5 As shown, the valve seat sealing member 21 is formed into a structure in which a plurality of fitting protrusions 23 hang down from the inner edge of the lower surface of a plate-shaped frame-shaped main body 22 overlapping the upper surface of the sealing member mounting portion 19 .

[0042] The thickness (height) of the main body 22 is slightly smaller than the height of the step surface 18D. In addition, the width of the main body 22 is smaller than the width of the sealing member mounting portion 19. Figure 8 As shown, the main body portion 22 is fitted to the outer side of the annular protrusion 18 and overlaps with the upper surface of the sealing member mounting portion 19 , thereby forming a valve seat 11Z of the base portion 11 .

[0043] like Figure 5As shown, a plurality of interlocking protrusions 23 are arranged corresponding to a plurality of grooves 20 of a sealing component mounting portion 19, and a structure is formed in which a plurality of protrusions 23B are provided on the side of a rib 23A hanging down from a main body 22 and extending along the long side direction of each groove 20. A plurality of protrusions 23B extend in the up-down direction over the entire height of the rib 23A, and their cross-sectional shape is, for example, a flat semi-ellipse. By providing the interlocking protrusion 23 with the above-mentioned plurality of protrusions 23B, it is possible to suppress the resistance of the interlocking protrusion 23 to the groove 20, and it is possible to easily perform the interlocking operation. In addition, a plurality of protrusions 23B are arranged on the side of the rib 23A on the side of the annular protrusion 18, and on the side on the opposite side thereof, so as to form a staggered configuration in which the positions of the plurality of protrusions 23B deviate from each other between the above-mentioned two side surfaces. Thus, the interlocking protrusion 23 is deformed in a slightly meandering manner, so that it is easy to be accommodated in the groove 20.

[0044] In addition, the valve seat sealing member 21 of the present embodiment may also be formed with a lip protruding toward the valve body 35 side at the outer edge of the main body 22, for example. In this case, the lip may protrude upward from the upper surface of the annular protrusion 18, but regardless of the presence or absence of the lip, it is preferred that the thickness (height) of the inner edge of the main body 22 is flush with the upper surface of the annular protrusion 18 or is lower than the upper surface of the annular protrusion 18. In addition, the valve seat sealing member 21 is a structure in which the main body 22, which is plate-shaped and frame-shaped like the annular sealing member 17, is provided with the fitting protrusion 23, but it may not be provided with the fitting protrusion 23, and it may not be plate-shaped. That is, the valve seat sealing member 21 may be an O-ring, similar to the annular sealing member 17. In addition, in the case of having a fitting protrusion 23, the fitting protrusion 23 may be annularly arranged over the entire circumference of the inner edge of the valve seat sealing member 21, and the groove 20 may be an annular groove accordingly, or the fitting protrusion 23 may be a columnar shape with a circular, elliptical, polygonal or other cross-sectional shape, and a recess corresponding to the columnar fitting protrusion 23 may be formed instead of the groove 20. In addition, the plurality of protrusions 23B may be arranged only on either side of the rib 23A, and in the case of being arranged on the two sides of the rib 23A, they may be arranged at the same position between the two sides. In addition, the shape of the plurality of protrusions 23B is not limited to the shape of a ridge extending in the up-down direction, and may be, for example, hemispherical. Furthermore, the plurality of protrusions 23B may be formed on the inner side of the groove 20 instead of being formed on the fitting protrusion 23. The valve seat sealing member 21 and the annular sealing member 17 may be made of any material as long as it is an elastic body, and may be rubber, resin, foamed elastic body, or the like.

[0045] like Figure 3As shown in FIG. 1 , the valve body surrounding wall 25 protrudes upward from the entire outer edge of the base 11 (also the outer edge of the sealing member mounting portion 19). The valve body surrounding wall 25 includes, for example, a plurality of first wall portions 26 disposed at the four corners of the outer edge of the base 11, and a plurality of second wall portions 27 disposed between adjacent first wall portions 26 and lower than the first wall portions 26.

[0046] Specifically, the plurality of first wall portions 26 are formed from the outer edge portion of one pair of long sides of the outer edge portion of the base portion 11 near the corner portion to the midpoint of the arc of the corner portion, and the second wall portion 27 is formed in the other portion. Figure 8 As shown, the height of the second wall portion 27 from the upper surface of the sealing member mounting portion 19 is slightly higher than the annular protrusion 18 , and the height of the first wall portion 26 is approximately 2 to 4 times the height of the second wall portion 27 .

[0047] like Figure 3 As shown in FIG. 1 , a plurality of recesses 28 are formed on the side surface of the base 11 and at a portion located below each second wall portion 27. Figure 8 As shown in FIG. 1 , each recessed portion 28 is formed by recessing a portion slightly below the upper surface of the sealing member mounting portion 19 to a position inside the inner surface of the second wall portion 27. Figure 3 As shown in the figure, the concave portion 28 below the pair of second wall portions 27 on the short side is formed in the range of the second wall portion 27 except the two ends in the long side direction. On the other hand, the concave portion 28 below the pair of second wall portions 27 on the long side is formed in the entire range of the second wall portion 27 except the center in the long side direction. In addition, in the base 11, the portion of each concave portion 28 closer to the valve hole 13 than the inner side surface of the second wall portion 27 is made to penetrate to the upper surface of the sealing member mounting portion 19, thereby forming a slit-shaped drainage hole 29.

[0048] like Figure 3 As shown, a pair of bridge members 30 are provided between a pair of expansion portions 13A in the valve hole 13. The pair of bridge members 30 are in the form of strips extending in parallel with the width direction of the base 11 and facing each other in the long side direction of the base 11. In addition, the upper surface of the pair of bridge members 30 is flush with the upper surface of the annular protrusion 18, and the lower surface of the pair of bridge members 30 is flush with the lower surface of the entire base 11.

[0049] A cylindrical shaft fitting portion 31 extending in the vertical direction is provided at the center of the base 11, which is the center of the planar shape. The shaft fitting portion 31 is supported by a pair of bridge members 30. The shaft fitting portion 31 is in the shape of a cylinder with both ends open, and has a spring contact wall 31A extending inward from the upper end. In addition, a pair of recesses 31B are formed at two locations in the circumferential direction near the upper end in the vertical direction of the outer surface of the shaft fitting portion 31, and a pair of bridge members 30 are accommodated in the pair of recesses 31B. The pair of bridge members 30 and the shaft fitting portion 31 are formed as one body.

[0050] exist Figure 6 , the valve body 35 of the safety valve 10 is shown as a whole. The valve body 35 is, for example, a resin molded product, and as a whole, bulges upward and is in the shape of a thin disk with an open lower surface. The outer shape of the planar shape is similar to the outer shape of the planar shape of the base 11, and is a rectangular shape smaller than the base 11. In addition, a reinforcing rib 35L is formed on the inner surface of the valve body 35, and a shaft 40 hangs down from the center of the inner surface of the valve body 35. Moreover, as shown in FIG. Fig. 9 As shown, the valve body 35 is supported so as to be slidable in the vertical direction by a sliding support mechanism 40K mainly including the shaft fitting portion 31 and the shaft 40 fitted thereto, and is accommodated inside the valve body surrounding wall 25 .

[0051] In detail, Figure 2 As shown in FIG. 1 , the valve body 35 includes a rectangular flat plate portion 35A, a first annular inclined portion 35B inclined so as to gradually descend as it moves away from the flat plate portion 35A to the side, a second annular inclined portion 35C inclined so as to descend at a greater angle than the first annular inclined portion 35B as it moves away from the first annular inclined portion 35B to the side, a flange portion 35F extending laterally from the lower end of the second annular inclined portion 35C, and a flange portion 35F extending laterally from the lower end of the second annular inclined portion 35C. Fig. 9 As shown in the figure, an annular contact portion 35D protrudes downward from the inner edge of the common lower surface of the second annular inclined portion 35C and the flange portion 35F. In addition, the reinforcing rib 35L is lattice-shaped, and the lower surface of the reinforcing rib 35L is arranged at a midway position of the second annular inclined portion 35C in the vertical direction.

[0052] The cross section of the annular contact portion 35D is substantially triangular, and the annular contact portion 35D has an inclined surface that is flush with the inner surface of the second annular inclined portion 35C. When the valve body 35 is arranged in the ideal position in design, that is, the normal position, the entire annular contact portion 35D contacts the outer side of the fitting protrusion 23 of the main body portion 22 of the valve seat sealing member 21 serving as the valve seat 11Z.

[0053] The shaft 40 is cylindrical and is fitted with the inner side of the spring contact wall 31A in the shaft fitting portion 31. In addition, on the lower surface of the shaft 40, the circular plate 41 overlaps on the same axis of the shaft 40 and is screwed. The outer diameter of the circular plate 41 is larger than the shaft 40 and smaller than the inner diameter of the shaft fitting portion 31. Moreover, the circular plate 41 extends laterally from the shaft 40 in the shaft fitting portion 31 and is opposed to the spring contact wall 31A in the vertical direction. Between the spring contact wall 31A and the circular plate 41, the compression coil spring 42 is accommodated in a top pressure state. Through the above structure, the valve body 35 is supported relative to the base 11 so as to be reciprocating in the vertical direction, and the valve body 35 is pushed to the closed valve side that is in contact with the valve seat 11Z. In addition, by the push of the compression coil spring 42, the annular contact portion 35D of the valve body 35 is sunk into the valve seat sealing component 21 of the valve seat 11Z.

[0054] like Fig.12 As shown, the sliding support mechanism 40K allows a partial contact state in which only a portion of the annular contact portion 35D in the circumferential direction contacts the valve seat sealing member 21. Specifically, the shaft 40 is tilted relative to the shaft fitting portion 31 by the gap C1 between the inner surface of the spring contact wall 31A and the outer surface of the shaft 40, and the gap C2 between the inner surface of the main body of the shaft fitting portion 31 and the outer surface of the circular plate 41, thereby allowing the above-mentioned partial contact state.

[0055] In order to restrict the rotation of the valve body 35 about the shaft 40, a rotation restriction mechanism is provided which mainly includes the flange portion 35F of the valve body 35 and the side guide portion 45 described below. Figure 3 As shown, one end portion in the width direction of the multiple first wall portions 26 of the above-mentioned valve body surrounding wall 25 is located at the two ends of the straight line portion of a pair of long sides in the plane shape of the valve body surrounding wall 25, that is, the rectangle, and the side guide portion 45 protrudes from the inner surface of one end portion in the width direction of each of the above-mentioned first wall portions 26.

[0056] like Fig. 9 As shown in the figure, the front end surface of each lateral guide portion 45 facing the valve body 35 side forms a vertical surface 45A parallel to the vertical direction from the lower end to the middle position in the vertical direction, and forms an inclined surface 45B that is inclined so as to be separated from the valve body 35 to the side as it goes upward from the middle position to the upper end. In addition, the boundary between the vertical surface 45A and the inclined surface 45B is located slightly below the upper surface of the second wall portion 27 of the valve body surrounding wall 25.

[0057] Moreover, if Fig.10As shown in FIG. 1 , when the safety valve 10 is viewed from above, the plane shape of the valve body 35, that is, the end of the straight line portion of a pair of long sides in the rectangle, faces a position closer to one side than the midpoint in the width direction of each side guide portion 45, and the plane shape of the valve body 35, that is, the R chamfered portion of the corner of the rectangle, faces a position closer to the other side than the midpoint in the width direction of each side guide portion 45. Thus, it is possible to prevent one of the valve body 35 and the side guide portion 45 from sinking into the other.

[0058] On the other hand, at the front end surface of the flange portion 35F of the valve body 35, as shown in FIG. Figure 8 As shown, it includes a vertical surface 46A on the upper side than the midway position in the up-down direction, and an inclined surface 46B on the lower side than the vertical surface 46A. The vertical surface 46A is substantially parallel to the up-down direction, and the inclined surface 46B is inclined toward the side that approaches the annular contact portion 35D as it moves downward. In addition, at the intersection of the vertical surface 46A and the inclined surface 46B, an obtuse angle corner 35K extending toward the lateral guide portion 45 is formed. Moreover, when the annular contact portion 35D of the valve body 35 is sunken into the valve seat sealing member 21, the upper surface of the flange portion 35F of the valve body 35 is substantially located at a position at a height substantially the same as the boundary between the vertical surface 45A and the inclined surface 45B, and the vertical surface 46A of the valve body 35 is opposed to the vertical surface 45A of the lateral guide portion 45 with a slight gap therebetween.

[0059] The above is the description of the structure of the safety valve 10 of the present embodiment. Next, the effect of the safety valve 10 will be described. Figure 7 As shown, if the base 11 of the safety valve 10 is fixed to the container wall 91, the base 11 and the container wall 91 are sealed by the annular sealing member 17 sandwiched therebetween. Here, the annular sealing member 17 surrounds the valve hole 13 at a position farther from the valve hole 13 than the plurality of mounting holes 14 in the base 11, and the valve seat sealing member 21 of the valve seat 11Z that seals between the base 11 and the valve body 35 also surrounds the valve hole 13 at a position farther from the valve hole 13 than the plurality of mounting holes 14. Therefore, by the annular sealing member 17 and the valve seat sealing member 21, the plurality of mounting holes 14 and 93 of the base 11 and the container wall 91 can be sealed together with the sealing between the container 90 and the base 11.

[0060] Furthermore, since the safety valve 10 has a plurality of nuts 15 embedded in the base 11 and the interiors of the nuts 15 form the internal threads 14N in the mounting hole 14 , the mounting operation to the container 90 can be performed more easily than when the nuts 15 are provided separately on the base 11 .

[0061] When the safety valve 10 is in a normal state where the pressure in the container 90 is below a predetermined pressure, the annular abutment portion 35D of the valve body 35 is pressed against the valve seat sealing component 21 of the valve seat 11Z by the elastic force of the compression coil spring 42, thereby maintaining the safety valve 10 in a closed valve state. Furthermore, if the pressure in the container 90 exceeds the predetermined pressure due to the elastic force of the compression coil spring 42, the safety valve 10 enters an open valve state. Here, the container 90 on which the safety valve 10 of the present embodiment is installed houses a single battery as described above. When an undesirable situation occurs in which fluid leaks from the single battery, the pressure in the container 90 may rise suddenly. In response to this, the safety valve 10 of the present embodiment is arranged in such a manner that the valve seat 11Z surrounds the mounting hole 14 for fixing the base 11 to the container 90 as described above. Therefore, compared with the existing safety valve in which the mounting hole 14 is arranged on the outside of the valve seat 11Z, if the installation space is the same, the circumference of the valve seat 11Z becomes longer, and the flow rate of the fluid that can be discharged can be increased. Therefore, in the safety valve 10 of the present embodiment, from Figure 8 The closed valve state shown becomes Fig. 9 The valve is in the open state shown, and a large flow of fluid is discharged all at once, thereby being able to cope with a sudden increase in pressure in the container 90.

[0062] In addition, since the valve body 35 of the safety valve 10 is bulged toward the side away from the valve hole 13, it is easy to block the dynamic pressure of the fluid in the valve open state, and the valve body 35 is easy to move toward the valve open side. In addition, the valve hole 13 of the safety valve 10 is wider than the discharge hole 92. According to this, a large flow of fluid can be discharged at once immediately after the valve body 35 is opened.

[0063] In addition, in the safety valve 10 of the present embodiment, since the front end surface of the annular protrusion 18 located between the valve seat sealing member 21 and the valve hole 13 is located forward of the valve seat sealing member 21 in the protruding direction of the annular protrusion 18, the valve seat sealing member 21 is not directly affected by the dynamic pressure of the fluid discharged from the valve hole 13. Therefore, even if a large flow of fluid is discharged all at once as the valve is opened, the detachment of the valve seat sealing member 21 caused by the dynamic pressure of the fluid can be suppressed.

[0064] In addition, since the groove 20 is provided on the outer side of the annular protrusion 18 of the base 11, the fitting protrusion 23 of the valve seat sealing member 21 is fitted into the groove 20, so that the valve seat sealing member 21 is difficult to be separated. In addition, since a plurality of protrusions 23B are formed on the fitting protrusion 23, it is further difficult to separate the valve seat sealing member 21. In addition, since the plurality of protrusions 23B extend along the fitting direction relative to the groove 20, the fitting operation of the fitting protrusion 23 to the groove 20 can be easily performed.

[0065] And, because Fig. 9As shown by the arrow in FIG. 1 , the inner surface of the second annular inclined portion 35C of the valve body 35, that is, the fluid guide portion 35G, guides the discharged fluid from above toward the valve seat sealing member 21, so the dynamic pressure of the fluid acts in a direction that deepens the fitting of the valve seat sealing member 21 with respect to the annular protrusion 18. Accordingly, it is also possible to suppress the detachment of the valve seat sealing member 21 caused by the dynamic pressure of the fluid.

[0066] In addition, since the safety valve 10 of the present embodiment is provided with the lateral guide portion 45 that restricts the rotation of the valve body 35 independently of the sliding support mechanism 40K that supports the valve body 35 so as to be linearly movable, the load on the sliding support mechanism 40K can be suppressed, and the moving operation of the valve body 35 becomes smooth. Furthermore, since the lateral guide portion 45 is arranged to be opposed to the valve body 35 from the side and separated from the sliding support mechanism 40K, the rotation of the valve body 35 can be effectively suppressed.

[0067] Moreover, if Figure 8 As shown, the valve body 35 has a flange portion 35F extending laterally toward the lateral guide portion 45, and a front end surface of the flange portion 35F is provided with an obtuse-angle corner portion 35K extending toward the lateral guide portion 45, thereby preventing the valve body 35 from abutting against the surface of the lateral guide portion 45, and suppressing the friction resistance between the valve body 35 and the lateral guide portion 45 when the valve body 35 moves in a straight line.

[0068] In addition, if Fig.11 As shown, the inner surface of the lateral guide portion 45 is provided with an inclined surface 45B which is inclined in a manner of being separated from the valve body 35 as it is separated from the base 11. As a result, as the valve body 35 is opened, the gap between the inner surface of the lateral guide portion 45 is enlarged. As a result, it is possible to prevent the foreign matter X from being clamped between the valve body 35 and the lateral guide portion 45, thereby preventing the valve body 35 from being locked in the closed valve state. Moreover, the inclined surface 45B faces the front end surface of the flange portion 35F in the closed valve state. As a result, the gap between the front end surface of the flange portion 35F and the inner surface of the lateral guide portion 45 is enlarged by only slightly opening the valve body 35 from the closed valve state, and even if the foreign matter X is clamped by the gap, the valve body 35 is easily opened from the closed valve state.

[0069] In addition, if Figure 1 As shown in the figure, since the valve body 35 is surrounded by the valve body surrounding wall 25 protruding from the base 11, the valve body 35 is protected from collision with foreign matter, etc. In addition, since the side of the valve body surrounding wall 25 away from the base 11 is open, and there is no valve opening side opposing wall opposed to the valve body 35 from the valve opening side, it is possible to prevent the foreign matter from being clamped between the valve body 35 and the valve opening side opposing wall, thereby preventing the valve body 35 from being locked in the valve closing state.

[0070] Furthermore, since the valve body surrounding wall 25 includes the plurality of first wall portions 26 and the plurality of second wall portions 27 that are lower than the first wall portions 26 , the valve body 35 is protected and the discharge resistance of the fluid when the valve is opened can be suppressed.

[0071] In addition, if Figure 8 As shown in FIG. 1 , even if water enters the valve body surrounding wall 25, it is discharged to the outside from the drain hole 29, so that water can be prevented from entering the container 90 when the valve is opened. In addition, since the opening width W1 of the drain hole 29 is narrower than the gap W2 between the valve body 35 and the valve body surrounding wall 25 in the closed valve state, when the valve body 35 is slightly opened and the fluid is discharged from the valve hole 13, more of the fluid flows to the side between the valve body 35 and the valve body surrounding wall 25 than to the drain hole 29 side, and foreign matter X such as dust (see FIG. 1 ) is not included in the fluid. Fig.11 ) is clamped between the valve body 35 and the valve body surrounding wall 25, foreign matter can be blown from the gap to the side opposite to the drain hole 29.

[0072] However, if the safety valve 10 is maintained in a closed valve state for a long time, the valve seat sealing member 21 may adhere to the annular contact portion 35D of the valve body 35. In response to this, the sliding support mechanism 40K of the safety valve 10 of the present embodiment allows a partial contact state in which only a portion of the annular contact portion 35D in the circumferential direction abuts against the valve seat sealing member 21. As a result, when the valve is opened from a state in which the entire circumference of the annular contact portion 35D is attached to the valve seat sealing member 21, the valve body 35 tilts, and the annular contact portion 35D gradually separates from the valve seat sealing member 21, which can suppress the resistance when the valve is opened, thereby stabilizing the valve opening action.

[0073] [Second embodiment]

[0074] Below, refer to Fig.13 The second embodiment of the present disclosure is described. Fig.13 As shown in FIG. 1 , the safety valve 10B of the present embodiment is different from the safety valve 10 of the first embodiment in that the gap C3 that allows only a portion of the annular abutting portion 35D in the circumferential direction to abut against the valve seat sealing member 21 is provided only in the long side direction of the plane shape of the valve body 35. Specifically, in the safety valve 10B of the present embodiment, the cross-sectional shape of the shaft fitting portion 31 including the spring abutting wall 31A is an oval that is long in the long side direction of the rectangle in the plane shape of the valve body 35, and the above-mentioned gap C3 is provided. The structure other than the above is the same as that of the safety valve 10 of the first embodiment. The safety valve 10B of the present embodiment also achieves the same effects as the safety valve 10 of the first embodiment.

[0075] [Third embodiment]

[0076] Below, refer to Fig.14 and Fig.15 The third embodiment of the present disclosure is described. Fig.14 As shown, the safety valve 10C of this embodiment is different from the safety valve 10 of the first embodiment in that the arrangement of the shaft 40 and the shaft fitting portion 31 fitted thereto is deviated from the arrangement of the safety valve 10 of the first embodiment. Specifically, in the safety valve 10 of the first embodiment, when viewed from the shaft 40 and its axial direction, the shaft 40 and its center are arranged at a position overlapping with the centroid P1 of the area surrounded by the valve seat 11Z (see Fig.13 ), but in the safety valve 10C of the present embodiment, the axis 40 and its center P2 are arranged to be offset from the centroid P1 of the region surrounded by the valve seat 11Z in the longitudinal direction of the region. Fig.15 As shown, the compression coil spring 42 is, for example, a conical disc spring whose diameter increases upward. This can reliably prevent the compression coil spring 42 from being clamped between the inner surface of the spring contact wall 31A and the shaft 40. The structure other than the above is the same as the safety valve 10 of the first embodiment.

[0077] According to the structure of this embodiment, the valve body 35 is tilted with respect to the linear movement direction by the pressure in the container 90, and the resistance at the time of valve opening can be suppressed.

[0078] [Fourth embodiment]

[0079] Below, refer to Fig.16 and Fig.17 The fourth embodiment of the present disclosure is described. Fig.16 As shown, the safety valve 10D of the present embodiment is different from the safety valve 10 of the first embodiment only in the shape of the valve hole 13. That is, the safety valve 10D of the present embodiment is a structure in which the range from the bridge member 30 on one side to one end of the valve hole 13 of the safety valve 10 of the first embodiment (hereinafter referred to as the "original valve hole 13") is closed by the wall body 38, and the valve hole 13V is formed at a position opposite to the discharge hole 92 in the wall body 38, and the valve hole 13W and the valve hole 13V are combined to form the valve hole 13X of the entire safety valve 10D. As a result, when viewed from the axial direction of the shaft 40, the centroid P1 of the area surrounded by the valve seat 11Z is offset from the centroid P3 of the valve hole 13X. The structure other than the above is the same as that of the safety valve 10 of the first embodiment.

[0080] According to the safety valve 10D of this embodiment, when the pressure in the container 90 rises suddenly, the dynamic pressure of the fluid flowing in the container 90 acts unevenly on the valve body 35. Fig.17 As shown, the valve body 35 is inclined, and resistance when the valve is opened can be suppressed.

[0081] [Fifth embodiment]

[0082] Below, refer to Fig.18 The fifth embodiment of the present disclosure is described. Fig.18 As shown in FIG. 1 , in the safety valve 10E of the present embodiment, the valve body 35 of the safety valve 10 of the first embodiment is divided into the shaft 40 and the valve body main body 35H, and the upper end of the shaft 40 is connected to the valve body main body 35H through the hinge 40H. That is, the hinge 40H is included in the sliding support mechanism 40K. In addition, the rotation axis of the hinge 40H extends along the short side direction of the rectangular plane shape of the valve body 35. In addition, the gap between the shaft 40 and the shaft fitting part 31 is smaller than that of the safety valve 10 of the first embodiment. In the case of the safety valve 10 of the first embodiment, the shaft 40 does not tilt relative to the shaft fitting part 31. In addition, the valve body main body 35H is tilted by the hinge 40H, so that only a part of the circumferential direction of the annular contact part 35D is allowed to be in a partial contact state with the valve seat sealing member 21. The safety valve 10E of the present embodiment also has the same effects as the safety valve 10 of the first embodiment.

[0083] [Sixth embodiment]

[0084] Below, refer to Fig.19 The sixth embodiment of the present disclosure will be described. The overall shape of the safety valve 10F of this embodiment is not shown in the figure, but for example, it is the same as the safety valve 10 of the first embodiment, and only the surface roughness of the annular contact portion 35D is different. Fig.19 As shown in FIG. 1 , the annular contact portion 35D of the safety valve 10F of the present embodiment is the same as the safety valve 10 of the first embodiment, and has a triangular cross-section, and is sunken into the valve seat sealing member 21 from the front end (lower end) to the midway position in the vertical direction. That is, the area between the front end of the annular contact portion 35D and the midway position in the vertical direction on both the inner and outer side surfaces of the annular contact portion 35D becomes the contact area S2 with the valve seat sealing member 21. Moreover, in the contact area S2, the surface roughness of the annular contact portion 35D in the base end side area S4 is greater than the surface roughness of the front end side area S3. Specifically, the entire surface of the annular contact portion 35D except for the above-mentioned front end side area S3 is an embossed surface.

[0085] According to the safety valve 10F of the present embodiment, since the surface roughness of the base end side in the contact area S2 of the annular abutment portion 35D with the valve seat sealing member 21 is greater than the surface roughness of the front end side, it is possible to suppress the resistance when the valve is opened compared to the case where the contact area S2 is in close contact with the valve seat sealing member 21 with the same surface roughness. In addition, the structure of the annular abutment portion 35D of the present embodiment can also be applied to the safety valves 10B to 10E of the second to fifth embodiments.

[0086] [Seventh embodiment]

[0087] The shape of the safety valve of this embodiment is not shown in the figure, but is the same as the safety valve 10 of the first embodiment, for example, except that the surface roughness of the annular contact portion 35D is uneven in the circumferential direction. The surface roughness of the annular contact portion 35D on one side closer to the center in the long side direction of the rectangular plane shape of the valve body 35 is greater than the surface roughness of the annular contact portion 35D on one side.

[0088] The safety valve of this embodiment gradually separates from the valve seat sealing member 21 from the portion with large surface roughness in the annular contact portion 35D, thereby suppressing the resistance when the valve is opened. In addition, the structure of the annular contact portion 35D of this embodiment can also be applied to the safety valves 10B to 10E of the second to sixth embodiments.

[0089] [Other embodiments]

[0090] (1) In the safety valves 10, 10B to 10E of the above embodiments, the valve seat 11Z and the valve body 35 have a rectangular planar shape, but the shape is not limited thereto and may be a polygon other than a rectangle, a circle, an ellipse, or an irregular shape without a shaped surface.

[0091] (2) In the safety valves 10, 10B to 10E of the above-mentioned embodiments, the valve body 35 is supported to be linearly movable, but the safety valve may be opened and closed by rotating the valve body 35, or the valve body 35 itself may be elastically deformed so that the annular abutment portion of its outer edge approaches and moves away from the valve seat 11Z.

[0092] (3) In the safety valves 10 and 10B to 10E of the above embodiments, the valve body 35 and the valve seat 11Z include a sealing member (valve seat sealing member 21 ). However, the valve body 35 may include a sealing member.

[0093] <Note>

[0094] Hereinafter, for the feature groups extracted from the above-mentioned embodiments, effects, etc. are shown and explained as needed. In addition, below, for easy understanding, the figure numerals of the corresponding structures in the above-mentioned embodiments are appropriately shown with brackets, etc., but these feature groups are not limited to the specific structures determined by the figure numerals shown with the brackets, etc.

[0095] <First feature group>

[0096] [Feature 1]

[0097] A safety valve (10, 10B-10E) comprises: a base (11) overlapping with an opening edge of a discharge hole (92) of a container (90) and having a valve hole (13, 13X) opposite to the discharge hole (92); a fixing portion (14) provided on the base (11) and used to fix the base (11) to the container (90); a valve seat (11Z) provided on the base (11) and surrounding the valve hole (13, 13X) at a position farther from the valve hole (13, 13X) than the fixing portion (14); and a valve body (35) arranged opposite to the valve hole (13, 13X) and having an annular abutment portion (35D) that approaches and moves away from the valve seat (11Z).

[0098] In the safety valve (10, 10B to 10E) of feature 1, since the valve seat (11Z) is arranged to surround the fixing portion (14) for fixing the base (11) to the container, the circumference of the valve seat (11Z) becomes longer when the installation space (S1) is equal to that of the existing safety valve in which the fixing portion (14) is arranged outside the valve seat (11Z), thereby increasing the flow rate of the fluid that can be discharged. That is, according to the safety valve (10, 10B to 10E) of feature 1, it is possible to suppress the expansion of the installation space (S1) and increase the flow rate of the fluid that can be discharged compared to the past. In addition, in addition to the safety valve in which the valve body (35) moves linearly and the safety valve in which the valve body (35) rotates, the safety valve in which the valve body (35) itself is elastically deformed and the annular contact portion (35D) as its outer edge portion approaches and moves away from the valve seat (11Z) is also included.

[0099] [Feature 2]

[0100] In the safety valve (10, 10B~10E) described in feature 1, there is an annular sealing component (17), which is clamped between the above-mentioned container (90) and the above-mentioned base (11) and surrounds the above-mentioned valve hole (13, 13X) at a position farther away from the above-mentioned valve hole (13, 13X) than the above-mentioned fixing part (14).

[0101] In the safety valve (10, 10B to 10E) of feature 2, since the annular sealing component (17) clamped between the container (90) and the base (11) surrounds the valve hole (13, 13X) at a position farther away from the valve hole (13, 13X) than the fixing portion (14), when the mounting hole (93) corresponding to the fixing portion (14) is provided in the container (90), the mounting hole (93) can be sealed together with the seal between the container (90) and the base (11) through the annular sealing component (17).

[0102] [Feature 3]

[0103] In the safety valve (10, 10B to 10E) according to feature 2, the fixing portion (14) includes a plurality of mounting holes (14) through which a plurality of rod-shaped fasteners that penetrate inside and outside the container (90) pass.

[0104] Examples of the fixing portion (14) include an adhesive material bonded to the base (11) and the container (90), a structure in which an elastic engaging piece protruding from the base (11) engages with the opening edge of the discharge hole (92), and the structure of feature 2. If the structure of feature 2 is adopted, the base (11) can be easily and firmly fixed to the container (90).

[0105] [Feature 4]

[0106] In the safety valve (10, 10B to 10E) described in feature 3, the base (11) is a molded product in which a plurality of nuts are embedded, the plurality of rod-shaped fasteners are a plurality of bolts (B), and the plurality of mounting holes (14) include internal threaded portions (14N) of the plurality of nuts (15) threadedly engaged with the plurality of bolts (B).

[0107] Since the safety valve (10, 10B to 10E) of this feature has a nut (15) having an internal thread portion (14N) embedded in the base (11) for fixing the base (11) to the container (90), the installation operation to the container (90) can be performed more easily than in the case where the nut (15) is provided separately with respect to the base (11).

[0108] [Feature 5]

[0109] In the safety valve (10, 10B to 10E) according to any one of features 1 to 4, the valve body (35) as a whole has a shape that bulges toward a side away from the valve hole (13, 13X).

[0110] In the safety valve (10, 10B to 10E) of feature 5, since the valve body (35) is bulged toward the side away from the valve hole (13, 13X), it is easy to block the dynamic pressure of the fluid in the valve open state, and the valve body (35) is easy to move toward the valve open side. Therefore, after the valve body (35) is opened, a large flow of fluid can be discharged all at once.

[0111] [Feature 6]

[0112] In the safety valve (10, 10B-10E) described in any one of features 1 to 5, the plane shapes of the valve seat (11Z) and the valve body (35) are non-circular, and the safety valve (10-10E) comprises: a sliding support mechanism (40K), the sliding support mechanism (40K) comprising an axis (40) provided on one of the valve body (35) and the base (11), and an axis fitting portion (31) provided on the other and fitted with the axis (40), the sliding support mechanism (40K) supporting the valve body (35) so as to be able to move linearly in the axial direction of the axis (40); and a lateral guide portion (45), the lateral guide portion (45) protruding from the base (11) and opposed to the valve body (35) from the side, to limit the rotation of the valve body (35) around the axis (40).

[0113] In the safety valve (10, 10B to 10E) of feature 6, since a lateral guide portion (45) is provided to restrict the rotation of the valve body (35) independently of the sliding support mechanism (40K) that supports the non-circular valve body (35) so as to be linearly movable, the load on the sliding support mechanism (40K) can be suppressed, and the movement operation of the valve body (35) becomes smooth. Furthermore, since the lateral guide portion (45) is opposed to the valve body (35) from the side and is arranged away from the sliding support mechanism (40K), the rotation of the valve body (35) can be effectively suppressed.

[0114] [Feature 7]

[0115] In the safety valve (10, 10B~10E) described in Feature 6, the planar shapes of the valve seat (11Z) and the valve body (35) are quadrilaterals, and when observed from the linear movement direction of the valve body (35), the opposing surfaces (45A, 45B) of the side guide portion (45) to the valve body (35) are parallel to one side of the quadrilateral serving as the planar shape of the valve seat (11Z), and are opposite to one side of the quadrilateral serving as the planar shape of the valve body (35).

[0116] According to the structure of feature 7, it is possible to prevent one of the valve body (35) and the side guide portion (45) from sinking into the other.

[0117] [Feature 8]

[0118] In the safety valve (10, 10B to 10E) described in any one of Features 6 to 8, the valve body (35) has a flange portion (35F) extending laterally toward the lateral guide portion (45), and the front end surface of the flange portion (35F) is divided at a midway position in the moving direction of the valve body (35), and the divided portion has an obtuse corner portion (35K) extending toward the lateral guide portion (45).

[0119] According to the structure of feature 8, the valve body (35) can be prevented from contacting the surface of the side guide portion (45), and the friction resistance between the valve body (35) and the side guide portion (45) when the valve body (35) moves linearly can be suppressed.

[0120] [Feature 9]

[0121] In the safety valve (10, 10B to 10E) described in any one of features 6 to 8, the valve body (35) has a flange portion (35F) extending laterally toward the lateral guide portion (45), and an inner surface of the lateral guide portion (45) is provided with an inclined surface (45B) inclined laterally away from the front end surface of the flange portion (35F) as it moves away from the base in the linear movement direction of the valve body (35).

[0122] In the safety valve (10, 10B to 10E) of feature 9, since the inner surface of the lateral guide portion (45) is provided with an inclined surface (45B) which is inclined so as to be separated from the valve body (35) as it is separated from the base portion (11), the gap between the inner surface of the lateral guide portion (45) and the valve body (35) is enlarged as the valve body (35) opens. This prevents foreign matter from being caught between the valve body (35) and the lateral guide portion (45) and locking the valve body (35) in a closed valve state.

[0123] [Feature 10]

[0124] In the safety valve (10, 10B to 10E) according to feature 9, the inclined surface (45B) faces the front end surface of the flange portion (35F) in the valve closed state.

[0125] In the structure of feature 10, since the inclined surface (45B) of the side guide portion (45) is opposite to the side of the flange portion (35F) in the closed valve state, the gap between the valve body (35) and the inner surface of the side guide portion (45) is enlarged by just slightly opening the valve body (35) from the closed valve state, and even if foreign matter is clamped in the gap, the valve body (35) can be easily opened from the closed valve state.

[0126] [Feature 11]

[0127] In the safety valve (10, 10B-10E) described in any one of features 1 to 10, there is a valve body surrounding wall (25) protruding from the above-mentioned base (11) and surrounding the above-mentioned valve body (35) from the side, and the side of the above-mentioned valve body surrounding wall (25) away from the above-mentioned base (11) is open.

[0128] In the safety valve (10, 10B to 10E) of feature 11, the valve body (35) is protected by being surrounded from the side by the valve body surrounding wall (25). In addition, since the side of the valve body surrounding wall (25) away from the base (11) is open and does not have a valve opening side opposing wall opposed to the valve body (35) from the valve opening side, it is possible to prevent foreign matter from being caught between the valve body (35) and the valve opening side opposing wall, thereby preventing the valve body (35) from being locked in a closed valve state.

[0129] [Feature 12]

[0130] In the safety valve (10, 10B to 10E) described in Feature 11, the valve body surrounding wall (25) includes a plurality of first wall portions (26) dispersedly arranged at a plurality of locations in its circumferential direction, and a plurality of second wall portions (27) arranged between the first wall portions (26) and lower than the first wall portions (26).

[0131] In the safety valve (10, 10B~10E) of feature 11, since the valve body surrounding wall (25) includes a plurality of first wall portions (26) and a plurality of second wall portions (27) lower than the first wall portions (26), it is possible to suppress the discharge resistance of the fluid when the valve is opened while protecting the valve body (35).

[0132] [Feature 13]

[0133] In the safety valve (10, 10B~10E) described in feature 11 or 12, there is a drain hole (29), which has an opening that passes through the above-mentioned base (11) and is located between the above-mentioned valve body surrounding wall (25) and the above-mentioned valve seat (11Z), and is used to discharge water that has entered the above-mentioned valve body surrounding wall (25).

[0134] According to the safety valve (10, 10B to 10E) of feature 13, water that has entered the valve body surrounding wall (25) is discharged from the drain hole (29) to the outside of the valve body surrounding wall (25), thereby preventing water from entering the container (90) when the valve is opened.

[0135] [Feature 14]

[0136] In the safety valve (10, 10B to 10E) described in Feature 13, the opening of the drain hole (29) extends along the valve body surrounding wall (25), and its opening width is narrower than the gap between the valve body (35) and the valve body surrounding wall (25) in the closed valve state.

[0137] In the safety valve (10, 10B to 10E) of feature 14, the opening width of the drain hole (29) is narrower than the gap between the valve body (35) and the valve body surrounding wall (25) in the closed valve state. Therefore, when the valve body (35) is slightly opened to discharge the fluid from the valve hole (13, 13X), the fluid flows more toward the side between the valve body (35) and the valve body surrounding wall (25) than toward the drain hole (29). When foreign matter such as dust is caught between the valve body (35) and the valve body surrounding wall (25), the foreign matter can be blown from the gap to the side opposite to the drain hole (29).

[0138] [Feature 15]

[0139] In the safety valve (10, 10B-10E) described in any one of features 1-14, the valve hole (13, 13X) is wider than the discharge hole (92), and the entire discharge hole (92) is arranged to face a part of the valve hole (13, 13X).

[0140] In the safety valve (10, 10B to 10E) of feature 15, since the valve hole (13, 13X) is wider than the discharge hole (92), an increase in fluid resistance in the safety valve (10 to 10E) can be suppressed.

[0141] <Feature Group 2>

[0142] [Feature 1]

[0143] A safety valve (10-10E) comprising: a base (11) having a valve hole (13, 13X) and a valve seat sealing member (21) surrounding the valve hole (13, 13X); a valve body (35) which reciprocates while facing the valve hole (13, 13X) and has an annular abutment portion (35D) on its outer edge which approaches and moves away from the valve seat sealing member (21); and an annular protrusion (18). The annular protrusion (18) is arranged on the inner edge of the above-mentioned base (11), and the above-mentioned valve seat sealing component (21) is embedded on the outside, and the inside becomes the above-mentioned valve hole (13, 13X). The front end face of the above-mentioned annular protrusion (18) is flush with the inner edge of the above-mentioned valve seat sealing component (21), or the front end face of the above-mentioned annular protrusion (18) is located in a forward position than the inner edge of the above-mentioned valve seat sealing component (21) in the protruding direction of the annular protrusion (18).

[0144] In the safety valve (10 to 10E) of feature 1, since the front end surface of the annular protrusion (18) between the valve seat sealing member (21) and the valve hole (13, 13X) is flush with the inner edge of the valve seat sealing member (21), or the front end surface of the annular protrusion (18) is located forward of the inner edge of the valve seat sealing member (21) in the protruding direction of the annular protrusion (18), the valve seat sealing member (21) is not directly affected by the dynamic pressure of the fluid discharged from the valve hole (13, 13X). As a result, the detachment of the valve seat sealing member (21) caused by the dynamic pressure of the fluid can be suppressed.

[0145] [Feature 2]

[0146] In the safety valve (10~10E) described in feature 1, there is a fluid guide portion (35G), which is arranged at a position close to the outer edge portion of the above-mentioned valve body (35) and is inclined in a manner of gradually moving away from the above-mentioned valve seat sealing component (21) in the through direction of the above-mentioned valve hole (13, 13X) as it moves from the above-mentioned annular abutment portion (35D) toward the central side of the above-mentioned valve hole (13, 13X).

[0147] According to the safety valve (10 to 10E) of feature 2, the dynamic pressure of the fluid guided by the fluid guide portion (35G) of the valve body (35) acts in a direction that deepens the fit of the valve seat sealing component (21) relative to the annular protrusion (18). As a result, the valve seat sealing component (21) can be prevented from being separated due to the dynamic pressure of the fluid.

[0148] [Feature 3]

[0149] In the safety valve (10 to 10E) according to feature 2, the valve body (35) as a whole has a shape that bulges toward a side away from the valve hole (13, 13X).

[0150] In the safety valve (10-10E) of feature 3, since the valve body (35) is bulged toward the side away from the valve hole (13, 13X), it is easy to block the dynamic pressure of the fluid in the valve open state, and the valve body (35) is easy to move toward the valve open side. Therefore, after the valve body (35) is opened, a large amount of fluid can be discharged at once.

[0151] [Feature 4]

[0152] In the safety valve (10-10E) described in any one of features 1 to 3, there is a recessed portion (20) formed in the above-mentioned base (11) and overlapping with the above-mentioned valve seat sealing component (21), and a fitting protrusion (23) provided on the above-mentioned valve seat sealing component (21) and fitting with the above-mentioned recessed portion (20).

[0153] According to the safety valve (10 to 10E) of feature 4, the valve seat sealing component (21) is difficult to be separated by fitting the fitting protrusion (23) of the valve seat sealing component (21) into the recess (20) of the base (11).

[0154] [Feature 5]

[0155] In the safety valve (10-10E) described in feature 4, a plurality of protrusions (23B) are provided on the inner side surface of the recess (20) or the side surface of the engaging protrusion (23), and the engaging protrusion (23) is pressed into the recess (20).

[0156] According to the safety valve (10 to 10E) of feature 5, it is possible to make the valve seat sealing member (21) difficult to come off.

[0157] [Feature 6]

[0158] In the safety valve (10-10E) described in Feature 5, the recess (20) is in the form of a groove extending along the circumference of the annular protrusion (18) or surrounding the annular protrusion, and the plurality of protrusions (23B) are formed on two side surfaces of the engaging protrusion (23), namely, a surface on the side close to the valve hole and a surface on the side opposite to the surface.

[0159] The cross-section of the recess (20) and the fitting protrusion (23) may be circular, elliptical, or oblong, or may be a groove extending along the circumference of the annular protrusion (18) or surrounding the annular protrusion (18) as in Feature 6. In the structure of Feature 6, a plurality of protrusions (23B) are formed on both side surfaces of the fitting protrusion (23) on the valve hole side and on the opposite side, thereby preventing the valve seat sealing member (21) from being separated from the dynamic pressure of the fluid.

[0160] [Feature 7]

[0161] In the safety valve (10 to 10E) according to feature 6, the plurality of protrusions (23B) extend along a fitting direction with respect to the recess (20).

[0162] According to the safety valve (10 to 10E) of feature 7, the fitting protrusion (23) can be easily fitted into the recess (20).

[0163] [Feature 8]

[0164] In the safety valve (10 to 10E) according to feature 7, the plurality of protrusions (23B) are arranged on the both side surfaces of the fitting protrusion (23) so as to be offset from each other.

[0165] The plurality of protrusions (23B) may be provided on one of the two side surfaces of the fitting protrusion (23), or may be provided on the two side surfaces of the fitting protrusion (23). In addition, when the plurality of protrusions (23B) are provided on the two side surfaces of the fitting protrusion (23), the plurality of protrusions (23B) may be arranged to be opposed to each other and formed at the same position on the two side surfaces, or may be arranged to be staggered as in Feature 8. According to the structure of Feature 8, the fitting protrusion (23) can be deformed in a slightly meandering manner and accommodated in the recess (20).

[0166] <Third characteristic group>

[0167] [Feature 1]

[0168] A safety valve (10, 10B to 10D), comprising: a base (11) overlapping an opening edge of a discharge hole (92) of a container (90), and comprising a valve hole (13, 13X) opposed to the discharge hole (92), and a valve seat (11Z) surrounding the valve hole (13, 13X); a valve body (35) disposed opposed to the valve hole (13, 13X), and having an annular abutment portion (35D) abutting against the valve seat (11Z); a sliding support mechanism (40K), the sliding support mechanism (40K) comprising a shaft (40) provided on one of the valve body (35) and the base (11), and a shaft fitting portion (35D) provided on the other and fitted with the outer side of the shaft (40); 1), the sliding support mechanism (40K) supports the valve body (35) so as to be able to move linearly in the axial direction of the shaft (40); and a sealing component (21), the sealing component (21) is arranged on one of the valve seat (11Z) or the annular abutment portion (35D), and the other side is in close contact with the sealing component (21) as a sealing tight portion (35D), in the above-mentioned safety valve (10, 10B~10D), a gap (C1, C2, C3) is provided in the sliding support mechanism (40K), and the gap (C1, C2, C3) allows the above-mentioned shaft (40) to be relatively tilted with respect to the above-mentioned shaft fitting portion (31) to become a partial abutment state in which only a circumferential portion of the above-mentioned sealing tight portion (35D) abuts against the above-mentioned sealing component (21).

[0169] In the safety valve (10, 10B-10D) of feature 1, a sliding support mechanism (40K) that supports the valve body (35) to be linearly movable is provided with gaps (C1, C2, C3), and the gaps (C1, C2, C3) allow only a portion of the circumferential direction of the seal close contact portion (35D) to be in partial contact with the sealing member (21). Thus, when the safety valve (10, 10B-10D) is maintained in a closed state for a long time and the valve is opened from a state in which the entire circumference of the seal close contact portion (35D) is attached to the sealing member (21), the valve body (35) tilts and the seal close contact portion (35D) gradually separates from the sealing member (21), thereby suppressing resistance when opening the valve and stabilizing the valve opening action.

[0170] [Feature 2]

[0171] In the safety valve (10C) described in feature 1, when the shaft (40) is viewed in the axial direction, the shaft (40) is arranged to be offset from the centroid (P1) of the region surrounded by the valve seat (11Z).

[0172] According to the structure of feature 2, the valve body (35) is tilted relative to the linear movement direction by the pressure in the container (90), so that the resistance when opening the valve can be suppressed.

[0173] [Feature 3]

[0174] In the safety valve (10D) described in feature 1, when viewed from the axial direction of the shaft (40), the centroid (P1) of the area surrounded by the valve seat (11Z) and the centroid (P3) of the valve hole (13X) are arranged to be offset.

[0175] According to the structure of feature 3, when the pressure in the container (90) rises suddenly, the dynamic pressure of the fluid flowing in the container (90) acts unevenly on the valve body (35) and the valve body (35) tilts, thereby suppressing the resistance when opening the valve.

[0176] [Feature 4]

[0177] In the safety valve (10, 10B to 10E) according to any one of features 1 to 3, the surface roughness of the seal close contact portion (35D) is different in an unbalanced manner in the circumferential direction.

[0178] In the safety valve (10, 10B to 10E) of feature 4, since the surface roughness of the sealing close-fitting portion (35D) differs in an uneven manner in the circumferential direction, the sealing close-fitting portion (35D) gradually detaches from the sealing component (21) starting from the portion with the largest surface roughness, thereby suppressing the resistance when opening the valve.

[0179] [Feature 5]

[0180] In the safety valve (10, 10B to 10E) described in any one of features 1 to 4, the sealing close-fitting portion (35D) is shaped to protrude toward the sealing component (21), and the surface roughness of the base end side of the sealing close-fitting portion (35D) in a contact area (S2) with the sealing component (21) is greater than the surface roughness of the front end side.

[0181] In the safety valve (10, 10B to 10E) of feature 5, since the surface roughness on the base end side of the contact area (S2) of the sealing tight-fitting portion (35D) that contacts the sealing component (21) is greater than the surface roughness on the front end side, the resistance when opening the valve can be suppressed compared to the case where the contact area (S2) is in the same tight contact with the sealing component (21) with the same surface roughness.

[0182] [Feature 6]

[0183] In the safety valve (10 to 10D) according to feature 5, the base end side of the contact region (S2) is an embossed surface.

[0184] The difference in surface roughness between the base end side and the front end side in the above-mentioned contact area (S2) can be set by mirror finishing only the front end side, or by making the base end side an embossed surface as in feature 6, or by other structures.

[0185] [Feature 7]

[0186] A safety valve (10, 10B to 10E), comprising: a base (11) overlapping with an opening edge of a discharge hole (92) of a container (90), and having a valve hole (13, 13X) opposite to the discharge hole (92), and a valve seat (11Z) surrounding the valve hole (13, 13X); a valve body (35) having an annular abutment portion (35D) that approaches and moves away from the valve seat (11Z); and a sliding support mechanism (40K) that moves the valve body (35) toward and away from the valve seat (11Z). ) is supported so as to be able to move linearly relative to the above-mentioned base (11); and a sealing component (21), which is arranged on one of the above-mentioned valve seat (11Z) or the above-mentioned annular abutment portion (35D), and the other side serves as a sealing tight-fitting portion (35D) and is tightly fitted with the sealing component (21). In the above-mentioned safety valve (10A~10E), the above-mentioned sliding support mechanism (40K) allows the above-mentioned valve body (35) to tilt and move so as to achieve a partial abutment state in which only a circumferential portion of the above-mentioned sealing tight-fitting portion (35D) abuts against the above-mentioned sealing component (21).

[0187] In the safety valve (10, 10B to 10E) of feature 7, a sliding support mechanism (40K) that supports the valve body (35) so as to be able to move linearly allows the valve body (35) to tilt so as to achieve a partial contact state in which only a portion of the sealing close contact portion (35D) in the circumferential direction contacts the sealing member (21). Thus, when the safety valve (10, 10B to 10D) is maintained in a closed state for a long time and the valve is opened from a state in which the sealing close contact portion (35D) is attached to the sealing member (21) all around, the valve body (35) tilts and the sealing close contact portion (35D) gradually separates from the sealing member (21), thereby suppressing resistance during valve opening and stabilizing the valve opening action.

[0188] In addition, in this specification and the drawings, specific examples of the technology included in the claims are disclosed, but the technology recorded in the claims is not limited to these specific examples, and technologies in which various deformations and changes are made to the specific examples are also included. In addition, technologies in which a part is separately taken out from the specific examples are also included.

[0189] Description of reference numerals:

[0190] 10, 10B to 10D…safety valve; 11…base; 11Z…valve seat; 13, 13X…valve hole; 14…mounting hole; 14N…internal threaded portion; 15…nut; 17…annular sealing member; 18…annular protrusion; 19…seal member mounting portion; 20…groove; 21…seal member for valve seat (seal member); 23…fitting protrusion; 23B…protrusion; 25…valve body surrounding wall; 26…first wall portion; 27…second wall portion; 31… Shaft fitting portion; 35…valve body; 35D…annular abutment portion (sealing tight portion); 35F…flange portion; 35G…fluid guide portion; 35K…obtuse corner portion; 40…shaft; 40H…hinge portion; 40K…sliding support mechanism; 45…lateral guide portion; 45A…vertical surface; 45B…inclined surface; 90…container; 92…discharge hole; 93…mounting hole; B…bolt; C1, C2, C3…clearance; S1…setting space; S2…contact area.

Claims

1. A safety valve, characterized in that: have: a base portion overlapping an opening edge of a discharge hole of the container and comprising a valve hole facing the discharge hole and a valve seat surrounding the valve hole; a valve body having an annular abutting portion abutting against the valve seat; a sliding support mechanism including a shaft provided on one of the valve body and the base, and a shaft fitting portion provided on the other and fitted on the outside of the shaft, the sliding support mechanism supporting the valve body so as to be linearly movable in the axial direction of the shaft; and a sealing member, the sealing member being provided on one of the valve seat and the annular contact portion, and the other being in close contact with the sealing member as a sealing contact portion, In the safety valve, The slide support mechanism is provided with a gap that allows the shaft to tilt relative to the shaft fitting portion so that only a portion of the seal close contact portion in the circumferential direction contacts the seal member.

2. The safety valve according to claim 1, characterized in that: When the shaft is viewed in the axial direction, the shaft is arranged to be offset from the centroid of a region surrounded by the valve seat.

3. The safety valve according to claim 1, characterized in that: When viewed in the axial direction of the shaft, the centroid of the region surrounded by the valve seat is offset from the centroid of the valve hole.

4. The safety valve according to any one of claims 1 to 3, characterized in that: The surface roughness of the seal close contact portion varies unevenly in the circumferential direction.

5. The safety valve according to any one of claims 1 to 4, characterized in that: The seal close contact portion is in a shape that protrudes toward the seal member. The surface roughness of the base end side in the contact region with the sealing member in the seal close contact portion is larger than the surface roughness of the tip end side.

6. The safety valve according to claim 5, characterized in that: The base end side of the contact region is formed into an embossed surface.

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