CN108368941B - Valve element, and valve structure and joint member using same - Google Patents
Valve element, and valve structure and joint member using same Download PDFInfo
- Publication number
- CN108368941B CN108368941B CN201680072270.0A CN201680072270A CN108368941B CN 108368941 B CN108368941 B CN 108368941B CN 201680072270 A CN201680072270 A CN 201680072270A CN 108368941 B CN108368941 B CN 108368941B
- Authority
- CN
- China
- Prior art keywords
- valve
- annular
- seal portion
- annular seal
- valve body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012530 fluid Substances 0.000 claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/28—Couplings of the quick-acting type with fluid cut-off means
- F16L37/30—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings
- F16L37/32—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Multiple-Way Valves (AREA)
- Lift Valve (AREA)
- Check Valves (AREA)
Abstract
The invention provides a valve core which prevents a sealing part from falling off from a valve main body due to the action of fluid. The valve core has: a valve body (24) displaceable between a closed position and an open position; and a seal member (26) having an annular seal portion (36) and a connecting portion (38), wherein the annular seal portion (36) is fitted in an annular groove (30) provided along a conical sealing surface (28) of the valve body, the annular seal portion (36) is in sealing engagement with the valve seat surface (34) to prevent a fluid from flowing, and the connecting portion (38) connects diametrically opposed portions of the annular seal portion (36) by passing through a connecting hole (32) that penetrates in the valve body (24) in the diametrical direction.
Description
Technical Field
The present invention relates to a valve body suitable for being provided in a fluid passage through which a high-pressure fluid passes, and a valve structure and a joint member using the valve body.
Background
There is known a valve body provided in a fluid passage and displaceable between a closed position and an open position, and an annular seal member (e.g., O-ring) provided in the valve body and sealingly engaged with a valve seat when the valve body is in the closed position to prevent a flow of a fluid. As a countermeasure for solving this problem, for example, a technique has been developed in which a retaining ring for retaining a seal member to a valve body is provided in the valve body (patent document 1).
Prior art documents
Patent document
Patent document 1: japanese patent No. 4791196
Disclosure of Invention
Problem to be solved by the invention
The present invention is intended to solve the above-described problems by a method different from patent document 1.
Means for solving the problems
That is, the present invention provides a valve body having:
a valve body provided in the fluid passage and displaceable between a closed position for closing the fluid passage and an open position for opening the fluid passage, the valve body having an annular sealing surface facing forward, an annular groove provided along the sealing surface, and a connecting hole penetrating the valve body and having both ends communicating with the annular groove, the direction from the open position toward the closed position being defined as forward; and
and a seal member having an annular seal portion fitted in the annular groove, the annular seal portion being sealingly engaged with a valve seat surface formed annularly on a passage wall surface of the fluid passage when the valve body is in the closed position to prevent a flow of the fluid, and a connecting portion extending from a part of the annular seal portion, passing through the connecting hole, reaching another part of the annular seal portion, and connecting the two parts.
In this valve body, the seal member of the valve main body includes the annular seal portion and the connecting portion extending in the communication hole penetrating the valve main body to connect the two portions of the annular seal portion, and therefore, even if the annular seal portion is subjected to a flow of high-pressure fluid, the annular seal portion is less likely to fall off from the annular groove of the valve main body, and thus, the above-described problems in the conventional valve can be solved.
Preferably, the connection hole is configured to penetrate the valve main body in a diameter direction of the valve main body.
Such a coupling portion passing through the communication hole couples diametrically opposed portions of the annular seal portion, and the annular seal portion can be held in a more balanced manner. However, the communication hole and the connection portion passing through the communication hole are not limited to these, and may be configured to extend radially in three or more directions from the center of the valve main body, or may be configured such that two or more communication holes and connection portions pass through the valve main body independently of each other.
The annular seal portion may have annular front and rear side surfaces, and annular radially outer and radially inner side surfaces extending between the front and rear side surfaces, and the annular seal portion may have a rectangular cross section,
the connecting portion extends from one portion of the radially inner side surface to another portion of the radially inner side surface,
the sealing surface is a conical tapered surface tapering toward the front,
the annular groove is formed in the sealing surface formed in the conical shape, the annular groove has an annular groove bottom surface which is in contact with a radially inner side surface of the annular sealing portion fitted in the annular groove, a groove front side surface and a groove rear side surface which are in contact with the front side surface and the rear side surface of the annular sealing portion, respectively, and an opening portion which is opened in the sealing surface formed in the conical shape, and an edge portion on the radially outer side of the annular sealing portion on the front side and a portion near the edge portion extend from the opening portion and protrude annularly from the sealing surface.
In this case, the annular groove may have a groove radial direction outer side surface extending forward from a radially outer end edge of the groove rear side surface to reach the sealing surface, and the groove radial direction outer side surface may be configured to contact the radially outer side surface of the annular sealing portion fitted in the annular groove. The annular seal portion is made difficult to come off from the annular groove by contacting the radially outer surface of the annular seal portion with the radially outer surface of the groove located outside the annular seal portion.
The present invention also provides a valve structure body having:
the valve element as described above; and
and a valve housing having a fluid passage for accommodating the valve body and an annular valve seat surface formed on a wall surface of the fluid passage forward of the valve body.
Preferably, the valve seat surface is parallel to the sealing surface.
More preferably, the annular seal portion has an elastic modulus such that the annular seal portion deforms when the valve body is in the closed position and a fluid pressure applied to the valve body is equal to or greater than a predetermined value, so that the annular seal portion is compressed between the annular seal portion and the valve seat surface, and the sealing surface is brought into contact with the valve seat surface. With this configuration, when the fluid pressure in the fluid passage becomes equal to or higher than a predetermined value, the annular seal portion is substantially sealed by the fluid pressure, and even if the fluid pressure is applied, the annular seal portion is prevented from being pushed out through between the sealing surface and the valve seat surface. Therefore, the valve structure of the present invention can be used in a wide range of pressure regions from low-pressure fluid piping to high-pressure (ultrahigh-pressure) fluid piping.
In the valve structure, the valve body may be biased forward to be in the closed position by a spring member, and the spring member may allow the valve body to be displaced rearward by a fluid pressure in front of the valve body being equal to or higher than a predetermined value when the valve body is in the closed position, so that the annular seal portion is separated from the valve seat surface, whereby the valve body functions as a check valve.
The present invention also provides a joint member which is one of a female joint member and a male joint member of a pipe joint, the one joint member including the valve structure for closing a flow passage of the joint member, wherein the valve body of the valve structure is displaced to the open position by the other joint member when the one joint member is coupled to the other joint member.
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Drawings
Fig. 1 is a vertical cross-sectional view showing a pipe joint including a valve body according to an embodiment of the present invention, and shows a state where a male joint part and a female joint part are not connected to each other.
Fig. 2 is a view similar to fig. 1, but shows a state in which the fluid pressure in a fluid pipe, not shown, connected to the female joint member is high and the sealing surface of the valve main body to which the annular seal member is attached is directly engaged with the valve seat surface.
Fig. 3 is a vertical cross-sectional view showing a state in which the male joint member and the female joint member of the pipe joint shown in fig. 1 are coupled to each other and the valve body in the joint member is set at the open position.
Fig. 4 is a view showing the annular groove and the coupling portion formed in the valve body when viewed along the line IV-IV in fig. 1.
Fig. 5 is an enlarged sectional view of a portion shown by circle a in fig. 2.
Detailed Description
The pipe joint 10 shown in the drawings is composed of a female joint member 12 and a male joint member 14. When the above-described joint members 12 and 14 are connected, first, the sleeve 12b attached to the outer peripheral surface of the joint main body (valve housing) 12a of the female joint member 12 is displaced leftward from the position shown in fig. 1, and the spherical locking piece 12c is displaced radially outward. In this state, the male coupling member 14 is inserted into the female coupling member 12, and the locking piece 12c is continuously inserted while being pushed radially outward, so that the spherical locking piece 12c is fitted into the annular groove 14a provided in the outer peripheral surface of the male coupling member 14, and the sleeve 12b is returned to the original position by the biasing force of the coil spring 12 d. Thus, the lock piece 12c does not fall off the annular groove 14a, and the coupling of the joint members 12 and 14 is completed.
In the pipe joint 10 shown in the drawings, both the female joint member 12 and the male joint member 14 include shut-off type valve bodies 20 and 22 for closing the fluid passages 12A and 14A. When the joint members 12 and 14 are moved and coupled so as to approach each other in the axial direction, the valve bodies 20 and 22 are brought into contact with each other to stop the movement in the axial direction, and in this state, the joint members 12 and 14 are further moved, whereby both the valve bodies 20 and 22 are moved from the closed position shown in fig. 1 and 2, in which the flow of the fluid is blocked, to the open position shown in fig. 3, in which the flow of the fluid is allowed.
The above-described structure of the pipe joint is common knowledge to those skilled in the art, and a detailed description thereof will be omitted. The invention is particularly characterized by the spools 20, 22 as will be described below. Since the valve body 20 and the valve body 22 are substantially the same, only the valve body 20 will be described below.
The valve spool 20 has a valve main body 24 and a seal member 26 attached to the valve main body 24. When the valve body 20 is moved forward in the direction from the open position shown in fig. 3 to the closed position shown in fig. 1 and 2, the valve body 24 has a conical sealing surface 28 that tapers forward, an annular groove 30 that is provided along the sealing surface 28, and a connecting hole 32 (fig. 4) that penetrates the valve body 24 in the radial direction thereof and has both ends communicating with the annular groove 30.
As shown in fig. 5, the seal member 26 includes an annular seal portion 36 fitted to the annular groove 30, and a coupling portion 38 extending in the coupling hole 32 to couple diametrically opposed portions of the annular seal portion 36. When the valve body 20 is in the closed position shown in fig. 1 and 2, the annular seal portion 36 sealingly engages with a valve seat surface 34 formed annularly on a passage wall surface of the fluid passage 12A formed in the joint main body 12A to prevent the flow of the fluid. The annular seal portion 36 and the coupling portion 38 are formed by injection molding using the valve body 24 provided with the annular groove 30 and the coupling hole 32 as a part of a mold, as in the case of the insert molding.
As shown in fig. 5, the annular seal portion 36 has a front side surface 36a and a rear side surface 36b, and an annular radially outer surface 36c and a radially inner surface 36d extending between the front side surface 36a and the rear side surface 36b, and the annular seal portion 36 has a rectangular cross section. The annular groove 30 is formed in the conical sealing surface 28, and includes an annular groove bottom surface 30a that contacts a radially inner surface 36d of the annular sealing portion 36 fitted in the annular groove 30, a groove front side surface 30b and a groove rear side surface 30c that contact a front side surface 36a and a rear side surface 36b of the annular sealing portion 36, respectively, and an opening 30d that opens in the sealing surface 28. As shown by the imaginary line in fig. 5, the chamfered edge 36e on the radially outer and front side of the annular seal portion 36 and the substantially triangular portion in the vicinity thereof are provided so as to extend from the opening 30d and protrude annularly from the sealing surface 28
In the illustrated example, the groove rear side surface 30c is provided to extend straight from the annular groove bottom surface 30a so as to intersect with the sealing surface 28, but the groove rear side surface 30c may be stopped at a portion before reaching the sealing surface 28, and may extend forward from a radially outer end edge of the stopped portion so as to contact with the radially outer surface 36c of the annular sealing portion 36 so as to intersect with the conical sealing surface 28, thereby forming a groove radially outer surface 30 e. With this configuration, when the fluid acts to separate the annular seal portion 36 from the annular groove 30, the groove radial direction outer side surface 30e suppresses the annular seal portion 36 and assists the action of the connection portion 38, thereby more effectively preventing the annular seal portion 36 from separating from the annular groove 30.
In the above description, the valve body according to the present invention is applied to a pipe joint and the flow and shutoff of the fluid in the pipe joint are performed according to the connection and disconnection of the pipe joint. That is, for example, in the case where the valve body 22 is not provided in the male joint member, the valve body 20 is pressed against the valve seat surface 34 by the coil spring 40, and the valve body 20 is displaced rearward and separated from the valve seat surface 34 only when the fluid pressure in the fluid passage 14A in the connected male joint member 14 becomes equal to or higher than a predetermined value, and thus can function as a check valve capable of flowing the fluid from the fluid passage 14A side of the male joint member 14 to the fluid passage 12A side of the female joint member 12. That is, the valve body of the present invention can be used to configure a valve structure in various fluid passages, particularly a valve structure effective in a fluid passage through which a high-pressure fluid passes.
Description of reference numerals:
a pipe joint 10; a female fitting member 12; a joint main body (valve housing) 12 a; a sleeve 12 b; a locking member 12 c; a male fitting member 14; the annular groove 14 a; valve spools 20, 22; a valve body 24; a sealing member 26; a sealing surface 28; an annular groove 30; annular groove bottom surface 30 a; a slot front side 30 b; a groove rear side 30 c; an opening 30 d; a groove radial direction outer side surface 30 e; a connecting hole 32; a valve seat surface 34; an annular seal portion 36; a front side surface 36 a; a rear side surface 36 b; a radially outer side surface 36 c; a radially inner side surface 36 d; a front edge 36 e; and a joint 38.
Claims (6)
1. A valve core is provided, wherein,
the valve core is provided with:
a valve body provided in the fluid passage and displaceable between a closed position for closing the fluid passage and an open position for opening the fluid passage, the valve body having an annular sealing surface facing forward, an annular groove provided along the sealing surface, and a connecting hole penetrating the valve body and having both ends communicating with the annular groove, the direction from the open position toward the closed position being defined as forward; and
a seal member having an annular seal portion fitted in the annular groove, the annular seal portion being sealingly engaged with a valve seat surface formed annularly on a passage wall surface of the fluid passage when the valve body is in the closed position to prevent a flow of the fluid, and a connecting portion extending from a part of the annular seal portion, passing through the connecting hole, reaching another part of the annular seal portion, and connecting the two parts,
the connecting hole penetrates the valve main body along the diameter direction of the valve main body,
the annular sealing part is provided with an annular front side surface, an annular rear side surface, an annular radial outer side surface and an annular radial inner side surface which extend between the front side surface and the rear side surface, the cross section of the annular sealing part is rectangular,
the connecting portion extends from one portion of the radially inner side surface to another portion of the radially inner side surface,
the sealing surface is a conical tapered surface tapering toward the front,
the annular groove is formed along the sealing surface formed as the conical tapered surface, and has an annular groove bottom surface which is in contact with a radially inner side surface of the annular sealing portion fitted in the annular groove, a groove front side surface and a groove rear side surface which are in contact with the front side surface and the rear side surface of the annular sealing portion, respectively, and an annular opening portion which opens in the sealing surface formed as the conical tapered surface,
the rear side surface of the annular seal portion extends radially outward from the annular groove bottom surface and stops before reaching the opening portion opened in the sealing surface, extends forward from the stopping edge and extends to reach the groove front side surface, the edge portion of the annular seal portion on the front side thereof radially outward and the vicinity portion of the edge portion extend from the opening portion and annularly protrude from the opening portion, the longitudinal section of the annular seal portion is substantially triangular, and a space having a triangular longitudinal section is formed between the opening portion opened in the sealing surface and the radially outward side surface of the annular seal portion.
2. A valve structure body, wherein,
the valve structure is provided with:
the valve cartridge of claim 1; and
and a valve housing having a fluid passage for accommodating the valve body and an annular valve seat surface formed on a wall surface of the fluid passage forward of the valve body.
3. The valve structure according to claim 2,
the valve seat surface is parallel to the sealing surface.
4. The valve structure according to claim 3,
the annular seal portion has an elastic modulus that deforms the annular seal portion when the valve body is in the closed position and a fluid pressure applied to the valve body is a predetermined value or more, so that the annular seal portion is squashed between the annular seal portion and the valve seat surface, and the sealing surface is brought into contact with the valve seat surface.
5. The valve structure according to any one of claims 2 to 4,
the valve structure further includes a spring member that urges the valve main body forward to bring the valve main body into the closed position, and when the valve main body is in the closed position, the spring member allows the valve body to displace rearward when the fluid pressure ahead of the valve body is equal to or higher than a predetermined value, thereby separating the annular seal portion from the valve seat surface, whereby the valve body functions as a check valve.
6. A joint member which is one of a female joint member and a male joint member,
the one joint member includes the valve structure according to any one of claims 2 to 4 for closing a flow path of the joint member, and when the one joint member is connected to the other of the female joint member and the male joint member, the valve body of the valve structure is displaced to the open position by the other joint member.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015242658 | 2015-12-11 | ||
| JP2015-242658 | 2015-12-11 | ||
| PCT/JP2016/086763 WO2017099228A1 (en) | 2015-12-11 | 2016-12-09 | Valve body and valve structure and joint member in which said valve body is used |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108368941A CN108368941A (en) | 2018-08-03 |
| CN108368941B true CN108368941B (en) | 2019-12-20 |
Family
ID=59013280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680072270.0A Active CN108368941B (en) | 2015-12-11 | 2016-12-09 | Valve element, and valve structure and joint member using same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6613316B2 (en) |
| CN (1) | CN108368941B (en) |
| TW (1) | TWI633247B (en) |
| WO (1) | WO2017099228A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7119376B2 (en) * | 2018-01-10 | 2022-08-17 | 横浜ゴム株式会社 | poppet valve |
| CN108317323A (en) * | 2018-02-08 | 2018-07-24 | 宁波大雅汽车部件有限公司 | Quick connector with automatic cut-off function |
| TWI747295B (en) * | 2019-09-12 | 2021-11-21 | 日商日東工器股份有限公司 | Pipe joint components |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51157926U (en) * | 1975-06-10 | 1976-12-16 | ||
| JPS59196777U (en) * | 1983-06-17 | 1984-12-27 | 斉藤 俊彦 | non-return valve |
| DE3639221A1 (en) * | 1986-11-15 | 1988-05-19 | Rudolf Schroeder Industrieanla | Valve |
| JP3007965U (en) * | 1994-08-19 | 1995-02-28 | 株式会社ツーヘンハーゲンジャパン | Seal structure |
| JP2000352489A (en) * | 1999-06-11 | 2000-12-19 | Nasuko Fitting Kk | Pipe joint |
| EP1197691A2 (en) * | 2000-10-16 | 2002-04-17 | Ventrex Automotive GmbH | Fill valve |
| CN102900853A (en) * | 2011-07-26 | 2013-01-30 | 沙索技术有限公司 | Solids-handling equipment |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4320975Y1 (en) * | 1965-05-17 | 1968-09-04 | ||
| JPS5442015Y2 (en) * | 1974-10-07 | 1979-12-07 | ||
| JPS5231035U (en) * | 1975-08-26 | 1977-03-04 | ||
| JPS5233732U (en) * | 1975-08-30 | 1977-03-09 | ||
| JPS643161U (en) * | 1987-06-24 | 1989-01-10 | ||
| JP2762180B2 (en) * | 1991-08-20 | 1998-06-04 | 日信工業株式会社 | Poppet valve for master cylinder |
| US5406980A (en) * | 1994-03-28 | 1995-04-18 | Aeroquip Corporation | Deep drawn quick connect coupling |
| JP2004060709A (en) * | 2002-07-25 | 2004-02-26 | Yamatake Corp | Lining structure of valve element |
| JP4912375B2 (en) * | 2007-09-28 | 2012-04-11 | 長堀工業株式会社 | Fluid coupling |
-
2016
- 2016-12-09 CN CN201680072270.0A patent/CN108368941B/en active Active
- 2016-12-09 TW TW105140903A patent/TWI633247B/en active
- 2016-12-09 WO PCT/JP2016/086763 patent/WO2017099228A1/en active Application Filing
- 2016-12-09 JP JP2017555164A patent/JP6613316B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51157926U (en) * | 1975-06-10 | 1976-12-16 | ||
| JPS59196777U (en) * | 1983-06-17 | 1984-12-27 | 斉藤 俊彦 | non-return valve |
| DE3639221A1 (en) * | 1986-11-15 | 1988-05-19 | Rudolf Schroeder Industrieanla | Valve |
| JP3007965U (en) * | 1994-08-19 | 1995-02-28 | 株式会社ツーヘンハーゲンジャパン | Seal structure |
| JP2000352489A (en) * | 1999-06-11 | 2000-12-19 | Nasuko Fitting Kk | Pipe joint |
| EP1197691A2 (en) * | 2000-10-16 | 2002-04-17 | Ventrex Automotive GmbH | Fill valve |
| CN102900853A (en) * | 2011-07-26 | 2013-01-30 | 沙索技术有限公司 | Solids-handling equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI633247B (en) | 2018-08-21 |
| TW201734346A (en) | 2017-10-01 |
| WO2017099228A1 (en) | 2017-06-15 |
| JP6613316B2 (en) | 2019-11-27 |
| JPWO2017099228A1 (en) | 2018-11-01 |
| CN108368941A (en) | 2018-08-03 |
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