CN104251325A - Pressure operating valve and pressure setting method of pressure operating valve - Google Patents
Pressure operating valve and pressure setting method of pressure operating valve Download PDFInfo
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- CN104251325A CN104251325A CN201410208762.0A CN201410208762A CN104251325A CN 104251325 A CN104251325 A CN 104251325A CN 201410208762 A CN201410208762 A CN 201410208762A CN 104251325 A CN104251325 A CN 104251325A
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- 238000000034 method Methods 0.000 title claims description 12
- 239000012530 fluid Substances 0.000 claims description 29
- 238000003780 insertion Methods 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 238000005219 brazing Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
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Classifications
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- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
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- 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
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
- F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
- F16K7/17—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being actuated by fluid pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
本发明提供一种压力动作阀,在该压力动作阀中通过膜片(41)的变形来以设定压力开始开阀,并能够以简单的构造高精度地对设定压力进行设定。将膜片(41)与圆筒形的下盖(42)及上盖(43)形成为一体而构成弹性部件组装体(4)。在阀主体(1)的外周形成外螺纹部(1a),在下盖(42)的内周面形成内螺纹部(62a)。将由球阀(21)和阀杆(22)构成的阀体(2)配设在阀室(14)内。使球阀(21)与阀座(13a)抵接,利用作用力使膜片(41)的平坦部(41b)与阀杆抵接。通过将弹性部件组装体(4)旋入阀主体来调整膜片(41)按压阀体(2)的力,从而根据旋入量来调整设定压力。
The present invention provides a pressure-operated valve in which the valve is opened at a set pressure by deformation of a diaphragm (41), and the set pressure can be set with high precision with a simple structure. The diaphragm (41) is integrally formed with a cylindrical lower cover (42) and an upper cover (43) to form an elastic member assembly (4). An external thread portion (1a) is formed on the outer periphery of the valve main body (1), and an internal thread portion (62a) is formed on the inner peripheral surface of the lower cover (42). A valve body (2) composed of a ball valve (21) and a valve stem (22) is arranged in a valve chamber (14). The ball valve (21) is brought into contact with the valve seat (13a), and the flat portion (41b) of the diaphragm (41) is brought into contact with the valve stem by force. The force of the diaphragm (41) pressing the valve body (2) is adjusted by screwing the elastic component assembly (4) into the valve body, thereby adjusting the set pressure according to the amount of screwing in.
Description
技术领域technical field
本发明涉及利用波纹管、膜片等弹性部件的弹力来关闭阀口,并利用预先设定的流体的压力使弹性部件开始变形而敞开阀口的压力动作阀以及压力动作阀的设定压力的设定方法。The invention relates to a pressure-operated valve that uses the elastic force of elastic components such as bellows and diaphragm to close the valve port, and utilizes the pressure of the preset fluid to deform the elastic component to open the valve port and the setting pressure of the pressure-operated valve. Setting method.
背景技术Background technique
以往,作为这种压力动作阀,例如有日本特开平6-229481号公报(专利文献1)所公开的阀。该专利文献1的压力动作阀在阀主体的阀室内设置有相对于阀座落座/离座的球阀、和作为对该球阀向阀座侧加力的弹性部件的波纹管。并且,在从流入管流入的流体的压力为预先设定的压力(以下称为“设定压力”。)以下时,球阀总是为落座于阀座上的状态(闭阀状态),当从流入管流入的流体的压力超过设定压力时,波纹管收缩,球阀从阀座离座,流体从流出管流出。另外,在从阀室伸出的圆筒内设置对波纹管的自由端向球阀侧加力的杆和调整弹簧,利用调整螺钉对该调整弹簧的压缩量进行调整,来设定上述设定压力。Conventionally, as such a pressure-operated valve, there is, for example, a valve disclosed in JP-A-6-229481 (Patent Document 1). The pressure-operated valve of Patent Document 1 is provided with a ball valve seated/disengaged from a valve seat and a bellows as an elastic member biasing the ball valve toward the seat side in a valve chamber of a valve body. In addition, when the pressure of the fluid flowing in from the inflow pipe is below the preset pressure (hereinafter referred to as "set pressure"), the ball valve is always seated on the valve seat (valve closed state). When the pressure of the fluid flowing into the inflow pipe exceeds the set pressure, the bellows shrinks, the ball valve is released from the valve seat, and the fluid flows out from the outflow pipe. In addition, a rod and an adjustment spring that urge the free end of the bellows to the ball valve side are installed in the cylinder protruding from the valve chamber, and the compression amount of the adjustment spring is adjusted with the adjustment screw to set the above-mentioned set pressure. .
另外,作为用于因流体的压力超过设定压力而开始开阀的弹性部件而使用膜片的压力动作阀公开于例如实用新型注册第3151299号公报(专利文献2)、日本特开2006-77823号公报(专利文献3)、日本特开2009-243607号公报(专利文献4)。In addition, a pressure-operated valve using a diaphragm as an elastic member for starting the valve opening when the pressure of the fluid exceeds a set pressure is disclosed in, for example, Utility Model Registration No. 3151299 (Patent Document 2), Japanese Patent Laid-Open No. 2006-77823 Japanese Patent Publication No. 2009-243607 (Patent Document 4).
现有技术文献prior art literature
专利文献patent documents
专利文献1:日本特开平6-229481号公报Patent Document 1: Japanese Patent Application Laid-Open No. 6-229481
专利文献2:实用新型注册第3151299号公报Patent Document 2: Utility Model Registration No. 3151299
专利文献3:日本特开2006-77823号公报Patent Document 3: Japanese Patent Laid-Open No. 2006-77823
专利文献4:日本特开2009-243607号公报Patent Document 4: Japanese Patent Laid-Open No. 2009-243607
发明内容Contents of the invention
发明所要解决的课题The problem to be solved by the invention
专利文献1的压力动作阀成为经由螺旋弹簧来调整波纹管按压球阀的力、即设定压力的构造,因此需要螺旋弹簧等,存在部件件数变多之类的问题。另外,设定压力受螺旋弹簧的弹力和波纹管的弹性力双方影响,因此难以进行设定压力的微调整。The pressure-operated valve of Patent Document 1 has a structure in which the force that the bellows presses the ball valve, that is, the set pressure is adjusted via a coil spring. Therefore, a coil spring is required and the number of parts increases. In addition, since the set pressure is affected by both the elastic force of the coil spring and the elastic force of the bellows, fine adjustment of the set pressure is difficult.
另外,专利文献2至4的压力动作阀不是能够调整设定压力的构造,设定压力由膜片的形状、枚数、壁厚等设计、制造时决定。因此,难以根据使用环境等高精度地对设定压力进行设定,尚有改良的余地。In addition, the pressure-operated valves of Patent Documents 2 to 4 do not have a structure capable of adjusting the set pressure, and the set pressure is determined by the shape, number, and wall thickness of the diaphragms during design and manufacture. Therefore, it is difficult to set the set pressure with high precision according to the usage environment and the like, and there is room for improvement.
本发明的课题是在利用波纹管、膜片等弹性部件的变形来以设定压力开始开阀的压力动作阀中,能够以简单的构造高精度地对设定压力进行设定。The object of the present invention is to set the set pressure with high precision with a simple structure in a pressure operated valve that starts opening at a set pressure by utilizing deformation of elastic members such as a bellows and a diaphragm.
用于解决课题的方案Solution to the problem
方案1的压力动作阀具备:形成有使从一次侧接头流入的流体流向二次侧接头的阀口的阀主体;能够在上述阀口的轴线方向上变形的弹性部件;以及以上述轴线为中心的圆筒形的圆筒部件,由上述阀主体、上述弹性部件和上述圆筒部件划定与上述一次侧接头连通的压力室,在上述压力室的压力为设定压力以下时,利用上述弹性部件的作用力使阀部与上述阀口周围的阀座抵接而使上述阀口处于闭阀状态,当上述压力室的压力超过设定压力时,上述弹性部件变形,上述阀部从上述阀座离开而使上述阀口处于开阀状态,上述压力动作阀的特征在于,将上述弹性部件以能够在上述圆筒部件的轴线方向上变形的方式固定在该圆筒部件上而构成弹性部件组装体,从上述轴线方向嵌合上述弹性部件组装体的上述圆筒部件和上述阀主体,以利用上述弹性部件的作用力来使上述阀部与上述阀座抵接的状态将上述弹性部件组装体固定于上述阀主体。The pressure-operated valve according to claim 1 includes: a valve main body formed with a valve port allowing fluid flowing in from the primary side joint to flow to the secondary side joint; an elastic member deformable in the axial direction of the valve port; A cylindrical cylindrical member, the valve main body, the elastic member, and the cylindrical member define a pressure chamber communicating with the primary side joint. When the pressure in the pressure chamber is below the set pressure, the elastic The force of the component makes the valve part contact the valve seat around the valve port to make the valve port in the closed state. When the pressure in the pressure chamber exceeds the set pressure, the elastic member deforms, and the valve part is released from the valve. The seat is separated to make the valve port in the valve-open state, and the pressure-operated valve is characterized in that the elastic member is fixed on the cylindrical member in a manner that can deform in the axial direction of the cylindrical member to constitute an elastic member assembly. The above-mentioned cylindrical member of the above-mentioned elastic member assembly and the above-mentioned valve main body are fitted from the above-mentioned axial direction, and the above-mentioned elastic member assembly is assembled in a state where the above-mentioned valve part is brought into contact with the above-mentioned valve seat by the urging force of the above-mentioned elastic member. Fixed to the above valve body.
方案2的压力动作阀根据方案1所述的压力动作阀,其特征在于,通过上述弹性部件组装体的上述圆筒部件和上述阀主体以上述轴线为中心的内螺纹与外螺纹的螺纹结合,从而上述圆筒部件和上述阀主体嵌合。The pressure-operated valve according to claim 2. The pressure-operated valve according to claim 1, wherein the cylindrical member of the elastic member assembly and the valve main body are screwed together with an internal thread and an external thread centered on the axis, Thereby, the said cylindrical member and the said valve main body are fitted.
方案3的压力动作阀根据方案1或2所述的压力动作阀,其特征在于,在上述阀主体形成有从上述阀口连通到上述压力室的阀室和阀插通孔,上述阀部是在上述阀插通孔内能够在上述轴线方向上滑动的阀体,该阀体向上述弹性部件侧被加力。The pressure-operated valve according to claim 3. The pressure-operated valve according to claim 1 or 2, wherein a valve chamber and a valve insertion hole communicating from the valve port to the pressure chamber are formed on the valve body, and the valve part is A valve body slidable in the axial direction in the valve insertion hole is biased toward the elastic member.
方案4的压力动作阀根据方案3所述的压力动作阀,其特征在于,上述阀体使阀杆和球阀为一体而构成,在上述阀室及上述插通孔内,上述阀杆配置在上述弹性部件侧,上述球阀配置在上述阀座侧,上述球阀能够与上述阀座抵接。The pressure-operated valve according to claim 4 is the pressure-operated valve according to claim 3, wherein the valve body is formed by integrating a valve stem and a ball valve, and the valve stem is arranged in the above-mentioned valve chamber and the insertion hole. On the elastic member side, the ball valve is disposed on the valve seat side, and the ball valve can be in contact with the valve seat.
方案5的压力动作阀根据方案1或2所述的压力动作阀,其特征在于,将上述阀座配置在上述压力室内,将上述弹性部件的中央的平坦部作为上述阀部。A pressure-operated valve according to claim 5 is the pressure-operated valve according to claim 1 or 2, wherein the valve seat is disposed in the pressure chamber, and a central flat portion of the elastic member is used as the valve portion.
方案6的压力动作阀的设定压力的设定方法是如下压力动作阀的设定压力的设定方法,该压力动作阀构成为具备:形成有使从一次侧接头流入的流体流向二次侧接头的阀口的阀主体;以上述阀口的轴线为中心的圆筒形的圆筒部件;相对于上述圆筒部件的圆筒空间对置配置且能够在上述轴线方向上变形的弹性部件;以及利用上述弹性部件的作用力与上述阀口周围的阀座抵接而使上述阀口处于闭阀状态的阀部,上述弹性部件因上述压力室的压力而变形,从而上述阀部使上述阀口处于开阀状态,上述设定压力的设定方法设定该压力动作阀的上述阀部从上述阀座开始离开的设定压力,上述设定压力的设定方法的特征在于,将上述弹性部件以能够在上述圆筒部件的轴线方向上变形的方式固定在该圆筒部件上而构成弹性部件组装体,根据上述弹性部件组装体和上述阀主体在轴线方向的相对的位移量,来设定上述压力动作阀的上述设定压力。The method of setting the set pressure of the pressure-operated valve according to claim 6 is a method of setting the set pressure of the pressure-operated valve comprising: The valve main body of the valve port of the joint; a cylindrical cylindrical member centered on the axis of the valve port; an elastic member disposed opposite to the cylindrical space of the cylindrical member and deformable in the direction of the axial direction; and a valve portion that makes the valve port in a closed state by contacting the valve seat around the valve port with the force of the elastic member, and the elastic member is deformed by the pressure of the pressure chamber, so that the valve portion makes the valve port is in the valve-open state, the setting method of the above-mentioned set pressure sets the set pressure at which the above-mentioned valve part of the pressure-operated valve starts to separate from the above-mentioned valve seat, and the setting method of the above-mentioned set pressure is characterized in that the above-mentioned elastic The components are fixed on the cylindrical member in a manner deformable in the axial direction of the cylindrical member to form an elastic member assembly, and the elastic member assembly and the valve main body are set according to the relative displacement in the axial direction. Determine the above-mentioned set pressure of the above-mentioned pressure-operated valve.
本发明的效果如下。The effects of the present invention are as follows.
根据方案1的压力动作阀,在弹性部件组装体的圆筒部件与阀主体嵌合的状态下,通过调整弹性部件组装体与阀主体在轴线方向的相对位移量,从而能够根据该位移量来调整设定压力,因此能够容易地对设定压力进行设定。According to the pressure-operated valve of claim 1, by adjusting the relative displacement in the axial direction between the elastic member assembly and the valve main body in the state where the cylindrical member of the elastic member assembly is fitted to the valve main body, it is possible to adjust the valve according to the displacement. Since the set pressure can be adjusted, the set pressure can be easily set.
根据方案2的压力动作阀,除了方案1的效果以外,在设定压力的设定时,通过内螺纹与外螺纹的螺纹结合而将弹性部件组装体旋入阀主体,从而能够根据该旋入量来调整设定压力,因此能够高精度地对设定压力进行设定。According to the pressure-operated valve of claim 2, in addition to the effect of claim 1, when setting the set pressure, the elastic member assembly is screwed into the valve main body by screwing the internal thread and the external thread, so that The set pressure can be adjusted by the amount, so the set pressure can be set with high precision.
根据方案3的压力动作阀,除了方案1或2的效果以外,由于阀杆被插通孔引导,因此阀杆沿轴线滑动,能够使阀口可靠地处于闭阀状态。According to the pressure-operated valve of claim 3, in addition to the effect of claim 1 or 2, since the valve stem is guided by the insertion hole, the valve stem slides along the axis, and the valve port can be reliably closed.
根据方案4的压力动作阀,除了方案3的效果以外,利用球阀对阀座的向心作用,能够使阀口可靠地处于闭阀状态。According to the pressure-operated valve of solution 4, in addition to the effect of solution 3, the valve port can be reliably closed by utilizing the centripetal action of the ball valve on the valve seat.
根据方案5的压力动作阀,除了方案1或2的效果以外,由于利用弹性部件的平坦部直接开闭阀口,因此部件件数也变少,成为简单的构造。According to the pressure-operated valve of Claim 5, in addition to the effects of Claims 1 and 2, since the valve port is directly opened and closed by the flat portion of the elastic member, the number of parts is also reduced and the structure is simple.
根据方案6的压力动作阀的设定压力的设定方法,与方案1相同,通过调整弹性部件组装体与阀主体在轴线方向的相对的位移量,从而能够根据该位移量来对设定压力进行设定,因此能够容易地对设定压力进行设定。According to the setting method of the set pressure of the pressure-operated valve according to the plan 6, the same as the plan 1, by adjusting the relative displacement of the elastic member assembly and the valve body in the axial direction, the set pressure can be adjusted according to the displacement. It is possible to set the set pressure easily.
附图说明Description of drawings
图1是本发明的第一实施方式的压力动作阀的纵向剖视图。Fig. 1 is a longitudinal sectional view of a pressure-operated valve according to a first embodiment of the present invention.
图2是表示实施方式的压力动作阀的膜片的组装前的详细结构的放大俯视图以及放大剖视图。2 is an enlarged plan view and an enlarged cross-sectional view showing the detailed structure of the diaphragm of the pressure-operated valve according to the embodiment before assembly.
图3是本发明的第二实施方式的压力动作阀的纵向剖视图。Fig. 3 is a longitudinal sectional view of a pressure-operated valve according to a second embodiment of the present invention.
图4是适用于第一实施方式的压力动作阀的阀体的其他例子的图。Fig. 4 is a diagram showing another example of a valve body applied to the pressure-operated valve of the first embodiment.
图中:In the picture:
1—阀主体,1a—外螺纹部,11a—一次侧接头,12a—二次侧接头,13—阀口,13a—阀座,14—阀室,14a—阀插通孔,L—轴线,2—阀体(阀部),21—球阀,22—阀杆,3—螺旋弹簧,4—弹性部件组装体,41—膜片(弹性部件),42—下盖(圆筒部件),42a—内螺纹部,A1—压力室,5—阀主体,5a—外螺纹部,51a—一次侧接头,52a—二次侧接头,53—阀口,53a—阀座,6—弹性部件组装体,61—膜片(弹性部件),61b—平坦部(阀部),62—下盖(圆筒部件),62a—内螺纹部,A2—压力室。1—valve body, 1a—external thread, 11a—primary side joint, 12a—secondary side joint, 13—valve port, 13a—valve seat, 14—valve chamber, 14a—valve insertion hole, L—axis, 2—valve body (valve part), 21—ball valve, 22—valve stem, 3—coil spring, 4—elastic component assembly, 41—diaphragm (elastic component), 42—lower cover (cylindrical component), 42a —Internal thread, A1—pressure chamber, 5—valve body, 5a—external thread, 51a—primary side joint, 52a—secondary side joint, 53—valve port, 53a—valve seat, 6—elastic component assembly , 61—diaphragm (elastic component), 61b—flat portion (valve portion), 62—lower cover (cylindrical component), 62a—internal threaded portion, A2—pressure chamber.
具体实施方式Detailed ways
以下参照附图对本发明的压力动作阀的实施方式进行说明。图1是第一实施方式的压力动作阀的纵向剖视图。该实施方式的压力动作阀具有外形为大致圆柱形状的阀主体1。在阀主体1形成有配管连接孔11、配管连接孔12、阀口13、阀室14、直径与阀室14相同的阀插通孔14a、一次侧口15、弹簧室16、以及均压孔17。在配管连接孔11安装有供流体如箭头那样流入的一次侧接头11a。另外,在配管连接孔12安装有供流图如箭头那样流出的二次侧接头12a,二次侧接头12a的阀口13侧的内周成为二次侧口12a1。此外,一次侧接头11a和二次侧接头12a通过钎焊而与阀主体1组装成一体。一次侧接头11a经由一次侧口15与阀室14连通,二次侧接头12a经由阀口13与阀室14连通。另外,一次侧口15经由均压孔17与弹簧室16连通。此外,阀口13是以轴线L为中心的圆筒形状的孔(剖面为圆形的孔)。Embodiments of the pressure-operated valve of the present invention will be described below with reference to the drawings. Fig. 1 is a longitudinal sectional view of a pressure-operated valve according to a first embodiment. The pressure-operated valve of this embodiment has a valve main body 1 whose outer shape is substantially cylindrical. The valve body 1 is formed with a pipe connection hole 11, a pipe connection hole 12, a valve port 13, a valve chamber 14, a valve insertion hole 14a having the same diameter as the valve chamber 14, a primary side port 15, a spring chamber 16, and a pressure equalization hole. 17. A primary-side joint 11 a into which fluid flows as indicated by an arrow is attached to the pipe connection hole 11 . In addition, a secondary-side joint 12a is attached to the pipe connection hole 12, and the inner periphery of the secondary-side joint 12a on the side of the valve port 13 serves as a secondary-side port 12a1. In addition, the primary side joint 11a and the secondary side joint 12a are integrally assembled with the valve main body 1 by brazing. The primary side joint 11 a communicates with the valve chamber 14 through the primary side port 15 , and the secondary side joint 12 a communicates with the valve chamber 14 through the valve port 13 . In addition, the primary side port 15 communicates with the spring chamber 16 via the pressure equalizing hole 17 . In addition, the valve port 13 is a cylindrical hole (a hole with a circular cross section) centered on the axis L. As shown in FIG.
阀室14、阀插通孔14a以及弹簧室16通过从阀主体1的与二次侧口12相反一侧的端部穿通而形成,在阀室14及阀插通孔14a内配设有作为“阀部”的阀体2。阀体2由球阀21和圆柱状的阀杆22构成,球阀21在阀杆22的端部嵌合固定在定心凹部22a内。弹簧室16绕阀室14及阀插通孔14a形成为环状的深槽,在该弹簧室16内配设有螺旋弹簧3。在阀杆22固定有凸边状的弹簧支架22b,螺旋弹簧3在弹簧室16的底部与弹簧支架22b之间被压缩。由此,螺旋弹簧3对阀体2向后述的膜片41侧加力,向膜片41推压阀杆22。阀插通孔14a(以及阀室14)是与阀杆22一致的圆筒形状,阀杆22在阀插通孔14a内能够在轴线L方向上正确地滑动。此外,若将螺旋弹簧3对弹簧支架22b施加的力设为F、将闭阀时的一次侧的压力设为PD、将二次侧的压力设为Ps、将阀口13的截面面积设为S,则螺旋弹簧3的弹力设定为F<(PD-Ps)×S,而且,是在膜片41如后文所述那样变形时,阀体2能够随之在轴线L方向上移动的程度的比较弱的弹力。The valve chamber 14, the valve insertion hole 14a, and the spring chamber 16 are formed by passing through the end of the valve main body 1 opposite to the secondary side port 12. The valve body 2 of the "valve part". The valve body 2 is composed of a ball valve 21 and a cylindrical valve stem 22 , and the ball valve 21 is fitted and fixed in the centering recess 22 a at the end of the valve stem 22 . The spring chamber 16 is formed as an annular deep groove around the valve chamber 14 and the valve insertion hole 14 a , and the coil spring 3 is disposed in the spring chamber 16 . A flange-shaped spring holder 22b is fixed to the valve stem 22, and the coil spring 3 is compressed between the bottom of the spring chamber 16 and the spring holder 22b. As a result, the coil spring 3 biases the valve body 2 toward a diaphragm 41 , which will be described later, and presses the valve stem 22 toward the diaphragm 41 . The valve insertion hole 14a (and the valve chamber 14) has a cylindrical shape corresponding to the valve stem 22, and the valve stem 22 can slide accurately in the axis L direction in the valve insertion hole 14a. In addition, if the force exerted by the coil spring 3 on the spring bracket 22b is F, the primary side pressure when the valve is closed is PD, the secondary side pressure is Ps, and the cross-sectional area of the valve port 13 is S, the elastic force of the coil spring 3 is set to F<(PD-Ps)×S, and when the diaphragm 41 deforms as described later, the valve body 2 can move in the direction of the axis L accordingly. Relatively weak elasticity.
在阀主体1的与二次侧接头12a相反一侧,安装有弹性部件组装体4。弹性部件组装体4具备作为“弹性部件”的膜片41、作为“圆筒部件”的下盖42、以及圆盘状的上盖43。并且,膜片41、下盖42以及上盖43在图1的由点划线的椭圆所示的外周部被焊接而固定为一体。The elastic member assembly 4 is attached to the side of the valve main body 1 opposite to the secondary-side joint 12a. The elastic member assembly 4 includes a diaphragm 41 as an “elastic member”, a lower cover 42 as a “cylindrical member”, and a disc-shaped upper cover 43 . In addition, the diaphragm 41 , the lower cover 42 , and the upper cover 43 are integrally fixed by welding at the outer peripheral portion indicated by the dotted line ellipse in FIG. 1 .
图2是表示膜片41的组装前的详细结构的放大俯视图以及放大剖视图。膜片41是以轴线L为旋转中心的圆盘状的旋转体,由金属制板簧构成。并且具有:构成为圆锥台状且稍微呈球面状的面的圆锥部41a;位于圆锥部41a的内侧中央的平坦部41b;以及位于圆锥部41a的外周的凸缘部41c。FIG. 2 is an enlarged plan view and an enlarged cross-sectional view showing the detailed structure of the diaphragm 41 before assembly. The diaphragm 41 is a disk-shaped rotating body with the axis L as the center of rotation, and is composed of a metal leaf spring. It also has: a conical portion 41a having a truncated conical and slightly spherical surface; a flat portion 41b located in the center of the inner side of the conical portion 41a; and a flange portion 41c located on the outer periphery of the conical portion 41a.
作为“圆筒部件”的下盖42构成为以轴线L为中心的大致圆筒形状,相对于其内侧的圆筒空间对置配置膜片41,由阀主体1、膜片41、以及下盖42划定与弹簧室16连通的压力室A1。另外,膜片41能够相对于下盖42在轴线L方向上变形。压力室A1经由弹簧室16、均压孔17及一次侧口15与一次侧接头11a连通。The lower cover 42 as a "cylindrical member" is formed in a substantially cylindrical shape centered on the axis L, and the diaphragm 41 is arranged opposite to the cylindrical space inside it. The valve body 1, the diaphragm 41, and the lower cover 42 delimits pressure chamber A1 communicating with spring chamber 16 . In addition, the diaphragm 41 is deformable in the axis L direction with respect to the lower cover 42 . The pressure chamber A1 communicates with the primary side joint 11 a via the spring chamber 16 , the pressure equalization hole 17 , and the primary side port 15 .
在阀主体1的上部外周形成有以轴线L为中心的外螺纹部1a,在下盖42的内周面形成有以轴线L为中心的内螺纹部42a。并且,通过将下盖42的内螺纹部42a与阀主体1的外螺纹部1a螺纹结合,从而将弹性部件组装体4安装在阀主体1上。另外,在下盖42的下端的焊接部421,固定弹性部件组装体4和阀主体1。此外,阀主体1与下盖42之间由配置在比焊接部421靠内侧的O型密封圈18、PTFE(聚四氟乙烯)等构成的密封部件来密封。An externally threaded portion 1 a centered on the axis L is formed on the upper outer periphery of the valve main body 1 , and an internally threaded portion 42 a centered on the axis L is formed on the inner peripheral surface of the lower cover 42 . Then, the elastic member assembly 4 is attached to the valve main body 1 by screwing the internal thread portion 42 a of the lower cover 42 to the external thread portion 1 a of the valve main body 1 . In addition, the elastic member assembly 4 and the valve main body 1 are fixed to the welding portion 421 at the lower end of the lower cover 42 . In addition, the valve main body 1 and the lower cover 42 are sealed by a sealing member such as an O-ring 18 or PTFE (polytetrafluoroethylene) arranged inside the welding portion 421 .
根据以上的结构,流体从一次侧接头11a流入,该流体经由一次侧口15、阀插通孔14a与阀杆22之间的空隙、均压孔17、弹簧室16以及压力室A1向膜片41施加压力。在该压力为设定压力以下的情况下,膜片41不变形,而是通过膜片41的作用力推压阀杆22,球阀21被推压到阀口13的周围的阀座13a,成为图1的闭阀状态。另外,从一次侧接头11a流入的流体从一次侧口15向阀室14流入,但在图1的状态下,球阀21关闭阀口13,流体不会向二次侧接头12a流动。According to the above structure, the fluid flows in from the primary side joint 11a, and the fluid passes through the gap between the primary side port 15, the valve insertion hole 14a and the valve stem 22, the pressure equalizing hole 17, the spring chamber 16, and the pressure chamber A1 to the diaphragm. 41 Apply pressure. When the pressure is below the set pressure, the diaphragm 41 is not deformed, but the valve rod 22 is pushed by the acting force of the diaphragm 41, and the ball valve 21 is pushed to the valve seat 13a around the valve port 13, becoming The closed valve state of Figure 1. In addition, the fluid flowing in from the primary side joint 11a flows into the valve chamber 14 through the primary side port 15, but in the state shown in FIG.
另一方面,若流体的压力变高,压力室A1的压力超过设定压力,则膜片41在轴线L方向上变形,阀体2因螺旋弹簧3的弹力追随膜片41的变形在轴线L方向上移动。由此,球阀21从阀座13a离开,阀口13成为开阀状态,阀室14的流体开始从阀口13流向二次侧接头12a。并且,压力室A1的压力越高,球阀21与阀座13a的间隔越宽,流向二次侧接头12a的流体的量增加。On the other hand, if the pressure of the fluid becomes higher and the pressure in the pressure chamber A1 exceeds the set pressure, the diaphragm 41 is deformed in the direction of the axis L, and the valve body 2 follows the deformation of the diaphragm 41 on the axis L due to the elastic force of the coil spring 3 . direction to move. As a result, the ball valve 21 is separated from the valve seat 13a, the valve port 13 is opened, and the fluid in the valve chamber 14 starts to flow from the valve port 13 to the secondary side joint 12a. Furthermore, as the pressure in the pressure chamber A1 increases, the distance between the ball valve 21 and the valve seat 13a increases, and the amount of fluid flowing to the secondary side joint 12a increases.
在弹性部件组装体4的上盖43形成有夹具孔43a,在下盖42利用焊接部421进行固定之前,使夹具卡合于夹具孔43a并转动弹性部件组装体4,从而能够使该弹性部件组装体4相对于阀主体1在轴线L方向上移动。即、将弹性部件组装体4旋入阀主体1,利用该膜片41的作用力使膜片41与阀体2(阀杆22)抵接。通过调整该旋入量(弹性部件组装体4与阀主体1的相对的位移量),能够调整膜片41按压阀体2的力,因此能够根据压力室A1的压力来调整阀口13开始打开的压力、即设定压力。The upper cover 43 of the elastic member assembly 4 is formed with a jig hole 43a. Before the lower cover 42 is fixed by the welding portion 421, the elastic member can be assembled by engaging the jig in the jig hole 43a and rotating the elastic member assembly 4. The body 4 moves in the direction of the axis L relative to the valve body 1 . That is, the elastic member assembly 4 is screwed into the valve main body 1, and the diaphragm 41 is brought into contact with the valve body 2 (valve stem 22) by the urging force of the diaphragm 41 . By adjusting the amount of screw-in (relative displacement between the elastic member assembly 4 and the valve body 1), the force of the diaphragm 41 pressing the valve body 2 can be adjusted, so that the opening of the valve port 13 can be adjusted according to the pressure of the pressure chamber A1. The pressure, that is, the set pressure.
此外,在调整该设定压力时,从一次侧接头11a供给压力为相当于作为目标的设定压力的流体,通过旋入弹性部件组装体4,在阀口13成为闭阀状态的时刻(从二次侧接头12a不流出流体的时刻),停止弹性部件组装体4的旋入操作。然后,在上述焊接部421,固定弹性部件组装体4和阀主体1。这样,通过调整弹性部件组装体4与阀主体1的轴线L方向的相对位移量,从而调整设定压力的设定作业变得容易。该设定压力的调整也可以如下进行,即、暂时以规定量旋入弹性部件组装体4而处于闭阀状态,从一次侧接头11a供给压力为相当于作为目标的设定压力的流体,逐渐松开螺纹,在阀口13成为开阀状态的时刻(从二次侧接头开始流出流体的时刻),停止弹性部件组装体4的螺纹操作,进行焊接。In addition, when adjusting the set pressure, a fluid having a pressure corresponding to the target set pressure is supplied from the primary side joint 11a, and the elastic member assembly 4 is screwed in, at the time when the valve port 13 is in the closed state (from When the fluid does not flow out from the secondary side joint 12a), the screwing operation of the elastic member assembly 4 is stopped. Then, the elastic member assembly 4 and the valve main body 1 are fixed to the welding portion 421 . In this manner, by adjusting the relative displacement between the elastic member assembly 4 and the valve main body 1 in the axis L direction, the setting work for adjusting the set pressure becomes easy. The adjustment of the set pressure can also be performed by temporarily screwing in the elastic member assembly 4 by a predetermined amount to close the valve, supplying fluid with a pressure corresponding to the target set pressure from the primary side joint 11a, and gradually The thread is loosened, and when the valve port 13 is in the open state (when the fluid starts to flow out from the secondary side joint), the threading operation of the elastic member assembly 4 is stopped, and welding is performed.
在该第一实施方式中,由于利用阀体2的球阀21来关闭圆筒形状的阀口13,因此能够利用球阀21相对于阀座13a的向心作用使阀口13可靠地处于闭阀状态。另外,由于使阀杆22在阀插通孔14a内滑动,因此阀体2沿轴线L正确地滑动,从而能够使开阀状态的阀开度精度良好。In the first embodiment, since the cylindrical valve port 13 is closed by the ball valve 21 of the valve body 2, the valve port 13 can be reliably closed by utilizing the centripetal action of the ball valve 21 relative to the valve seat 13a. . In addition, since the valve rod 22 is slid in the valve insertion hole 14a, the valve body 2 slides accurately along the axis L, and the valve opening accuracy in the valve open state can be improved.
在上述第一实施方式中,阀体2包括球阀21和阀杆22,但例如也可以是图4所示的阀体。不论是哪种阀体都具有相当于上述阀杆22的圆柱部。并且,图4(A)的阀体是使阀口侧的下端为球状的阀体。图4(B)的阀体是使阀口侧的下端为针状的阀体。图4(C)的阀体是使阀口侧的下端为与阀座13a抵接的平坦面的阀体。In the above-mentioned first embodiment, the valve body 2 includes the ball valve 21 and the valve stem 22 , but may be, for example, a valve body as shown in FIG. 4 . Any valve body has a cylindrical portion corresponding to the above-mentioned valve rod 22 . In addition, the valve body of FIG. 4(A) is a valve body in which the lower end on the side of the valve port is spherical. The valve body of FIG. 4(B) is a valve body in which the lower end on the side of the valve port is shaped like a needle. The valve body of FIG. 4(C) is a valve body in which the lower end on the valve port side is a flat surface that comes into contact with the valve seat 13a.
图3是第二实施方式的压力动作阀的纵向剖视图。该实施方式的压力动作阀具有外形为大致圆柱形状的阀主体5。在阀主体5形成有配管连接孔51、配管连接孔52、阀口53、一次侧口54、以及二次侧口55。在配管连接孔51安装有流体如箭头那样流入的一次侧接头51a,在配管连接孔52安装有流体如箭头那样流出的二次侧接头52a。此外,一次侧接头51a和二次侧接头52a通过钎焊与阀主体5组装成一体。此外,阀口53是以轴线L为中心的截面为圆形的孔。Fig. 3 is a longitudinal sectional view of a pressure-operated valve according to a second embodiment. The pressure-operated valve of this embodiment has a valve main body 5 having a substantially cylindrical shape. A pipe connection hole 51 , a pipe connection hole 52 , a valve port 53 , a primary side port 54 , and a secondary side port 55 are formed in the valve main body 5 . A primary-side joint 51 a through which a fluid flows in as indicated by an arrow is attached to the pipe connection hole 51 , and a secondary-side joint 52 a through which a fluid flows out as indicated by an arrow is attached to the pipe connection hole 52 . In addition, the primary side joint 51a and the secondary side joint 52a are integrally assembled with the valve main body 5 by brazing. Furthermore, the valve port 53 is a hole having a circular cross-section centered on the axis L. As shown in FIG.
在阀主体5的外周安装有弹性部件组装体6。弹性部件组装体6具备作为“弹性部件”的膜片61、作为“圆筒部件”的下盖62、以及圆盘状的上盖63。并且,膜片61、下盖62以及上盖63在图1的由点划线的椭圆所示的外周部被焊接而固定为一体。An elastic member assembly 6 is attached to the outer periphery of the valve main body 5 . The elastic member assembly 6 includes a diaphragm 61 as an “elastic member”, a lower cover 62 as a “cylindrical member”, and a disc-shaped upper cover 63 . Further, the diaphragm 61 , the lower cover 62 , and the upper cover 63 are integrally fixed by welding at the outer peripheral portion indicated by the dotted line ellipse in FIG. 1 .
膜片61与上述图2所示的膜片41相同,是以轴线L为旋转中心的圆盘状的旋转体,由金属制板弹簧构成。并且具有:构成为圆锥台状且稍微呈球面状的面的圆锥部61a;位于圆锥部61a的内侧中央的作为“阀部”的平坦部61b;以及位于圆锥部61a的外周的凸缘部61c。The diaphragm 61 is the same as the diaphragm 41 shown in FIG. 2 above, and is a disk-shaped rotating body with the axis L as the center of rotation, and is composed of a metal leaf spring. It also has: a conical portion 61a having a slightly spherical surface in the shape of a truncated cone; a flat portion 61b serving as a “valve portion” located in the center of the inner side of the conical portion 61a; and a flange portion 61c located on the outer periphery of the conical portion 61a. .
作为“圆筒部件”的下盖62构成为以轴线L为中心的大致圆筒形状,相对于其内侧的圆筒空间对置配置膜片61,由阀主体5、膜片61、以及下盖62划定压力室A2。另外,膜片61能够相对于下盖62在轴线L方向上变形。压力室A2经由一次侧口54与一次侧接头51a连通。另外,阀口53经由二次侧口55与二次侧接头52a连通。阀口53的压力室A2侧的周围成为向压力室A2内突出的阀座53a,膜片61的平坦部61b与该阀座53a抵接。The lower cover 62 as a "cylindrical member" is formed in a substantially cylindrical shape with the axis L as the center, and the diaphragm 61 is arranged opposite to the cylindrical space inside it. The valve body 5, the diaphragm 61, and the lower cover 62 delimits pressure chamber A2. In addition, the diaphragm 61 is deformable in the axis L direction with respect to the lower cover 62 . The pressure chamber A2 communicates with the primary side joint 51 a via the primary side port 54 . In addition, the valve port 53 communicates with the secondary side joint 52 a via the secondary side port 55 . The periphery of the valve port 53 on the side of the pressure chamber A2 serves as a valve seat 53a protruding into the pressure chamber A2, and the flat portion 61b of the diaphragm 61 is in contact with the valve seat 53a.
在阀主体5的上部外周形成有以轴线L为中心的外螺纹部5a,在下盖62的内周面形成有以轴线L为中心的内螺纹部62a。并且,通过将下盖62的内螺纹部62a与阀主体5的外螺纹部5a螺纹结合,从而将弹性部件组装体6安装在阀主体5上。另外,在下盖62的下端的焊接部621,弹性部件组装体6和阀主体5被固定。此外,阀主体5与下盖62之间通过配设在比焊接部621更靠内侧的O型密封圈58来密封。An external thread portion 5 a centered on the axis L is formed on the upper outer periphery of the valve body 5 , and an internal thread portion 62 a centered on the axis L is formed on the inner peripheral surface of the lower cover 62 . Then, the elastic member assembly 6 is attached to the valve main body 5 by screwing the internal thread portion 62 a of the lower cover 62 and the external thread portion 5 a of the valve main body 5 . In addition, the elastic member assembly 6 and the valve main body 5 are fixed to the welding portion 621 at the lower end of the lower cover 62 . In addition, the valve body 5 and the lower cover 62 are sealed by the O-ring 58 disposed on the inner side of the welding portion 621 .
根据以上的结构,流体从一次侧接头51a流入,该流体经由一次侧口54及压力室A2向膜片61施加压力。在该压力为设定压力以下的情况下,膜片61不变形,平坦部61b通过膜片61的作用力被推压到阀座53a,成为图3的闭阀状态。由此,压力室A2的流体不向阀口53及二次侧接头52a流动。According to the above configuration, fluid flows in from the primary side joint 51a, and this fluid applies pressure to the diaphragm 61 through the primary side port 54 and the pressure chamber A2. When the pressure is lower than the set pressure, the diaphragm 61 is not deformed, and the flat portion 61b is pressed against the valve seat 53a by the force of the diaphragm 61, and the valve is in the closed state of FIG. 3 . Accordingly, the fluid in the pressure chamber A2 does not flow to the valve port 53 and the secondary side joint 52a.
另一方面,流体的压力变高,若压力室A2的压力超过设定压力,则膜片61变形,平坦部61b从阀座53a离开,成为开阀状态。由此,压力室A2的流体开始从阀口53流向二次侧接头52a。并且,压力室A2的压力越高,平坦部61b与阀座53a的间隔越宽,流向二次侧接头52a的流体的量增加。On the other hand, the pressure of the fluid increases, and when the pressure of the pressure chamber A2 exceeds the set pressure, the diaphragm 61 is deformed, and the flat portion 61b is separated from the valve seat 53a to be in the valve-open state. Thereby, the fluid in the pressure chamber A2 starts to flow from the valve port 53 to the secondary side joint 52a. Furthermore, as the pressure of the pressure chamber A2 increases, the distance between the flat portion 61b and the valve seat 53a increases, and the amount of fluid flowing to the secondary side joint 52a increases.
在弹性部件组装体6的上盖63形成有夹具孔63a,在下盖62利用焊接部621进行固定之前,使夹具卡合于夹具孔63a并转动弹性部件组装体6,能够使该弹性部件组装体6相对于阀主体5在轴线L方向上移动。即、将弹性部件组装体6旋入阀主体5,利用该膜片61的作用力使膜片61与阀座53a抵接。通过调整该旋入量(弹性部件组装体6与阀主体1的相对的位移量),能够调整膜片61的平坦部61b按压阀座53a的力,因此能够根据压力室A2的压力来调整阀口53开始打开的压力、即设定压力。The upper cover 63 of the elastic member assembly 6 is formed with a jig hole 63a. Before the lower cover 62 is fixed by the welding portion 621, the elastic member assembly can be made 6 moves in the axis L direction relative to the valve body 5 . That is, the elastic member assembly 6 is screwed into the valve main body 5, and the diaphragm 61 is brought into contact with the valve seat 53a by the force of the diaphragm 61 . By adjusting the amount of screwing (relative displacement between the elastic member assembly 6 and the valve main body 1), the force with which the flat portion 61b of the diaphragm 61 presses the valve seat 53a can be adjusted, so that the valve can be adjusted according to the pressure of the pressure chamber A2. The pressure at which the port 53 starts to open, that is, the set pressure.
在该第二实施方式中,在调整设定压力时,从一次侧接头51a供给压力相当于作为目标的设定压力的流体,旋入弹性部件组装体6,从而在阀口53成为闭阀状态的时刻(从二次侧接头52a不流出流体的时刻),停止弹性部件组装体6的旋入操作。然后,在上述焊接部621,固定弹性部件组装体6和阀主体5。这样,通过调整弹性部件组装体6和阀主体5的轴线L方向的相对的位移量,调整设定压力的设定作业变得容易。In this second embodiment, when the set pressure is adjusted, a fluid having a pressure corresponding to the target set pressure is supplied from the primary side joint 51a, and the elastic member assembly 6 is screwed into the valve port 53 to be in a closed state. At the timing (when the fluid does not flow out from the secondary side joint 52a), the screwing operation of the elastic member assembly 6 is stopped. Then, the elastic member assembly 6 and the valve main body 5 are fixed to the welding portion 621 . In this way, by adjusting the relative displacement in the axial line L direction of the elastic member assembly 6 and the valve main body 5, the setting work of adjusting the set pressure becomes easy.
在该第二实施方式中,由于成为利用膜片61的平坦部61b直接开闭阀口53的构造,因此相比第一实施方式,部件件数也少,成为简单的构造。In this second embodiment, since the valve port 53 is directly opened and closed by the flat portion 61b of the diaphragm 61, the number of parts is also reduced compared to the first embodiment, and the structure is simple.
如上所述,在各实施方式中,在设定压力的设定时,通过内螺纹与外螺纹的螺纹结合将弹性部件组装体(4、6)旋入阀主体(1、5),能够根据该旋入量来调整设定压力,因此能够高精度地对设定压力进行设定。As described above, in each embodiment, when setting the set pressure, the elastic member assembly (4, 6) is screwed into the valve main body (1, 5) by screwing the internal thread and the external thread. The screw-in amount adjusts the set pressure, so the set pressure can be set with high precision.
在以上的各实施方式中,对在阀主体侧形成外螺纹部、在弹性部件组装体侧形成内螺纹部的例子进行了说明,但也可以构成为在阀主体的内侧形成内螺纹部、在弹性部件组装体的外侧形成外螺纹部,通过该内螺纹部与外螺纹部的螺纹结合,将弹性部件组装体安装在阀主体上。In each of the above embodiments, an example in which an external thread portion is formed on the valve main body side and an internal thread portion is formed on the elastic member assembly side has been described, but it is also possible to form an internal thread portion on the inner side of the valve body and to form an internal thread portion on the elastic member assembly side. An external thread portion is formed on the outside of the elastic member assembly, and the elastic member assembly is attached to the valve main body by screwing the internal thread portion and the external thread portion.
另外,在各实施方式中,构成为通过外螺纹部和内螺纹部的螺纹结合来将弹性部件组装体和阀主体嵌合,但也可以构成为,没有外螺纹部和内螺纹部,在弹性部件组装体的圆筒部和阀主体上分别形成在轴线方向上相互嵌合的圆柱面,用这些圆柱面在轴线方向上相互嵌合。该情况下,在调整设定压力时,使用保持弹性部件组装体和阀主体的夹具,一边从一次侧接头供给压力为相当于作为目标的设定压力的流体,一边调整弹性部件组装体与阀主体的轴线方向的相对的位移量,在阀口成为闭阀状态的时刻,固定上述位移量。然后,在焊接部,固定弹性部件组装体和阀主体。这样,调整设定压力的设定作业变得容易。In addition, in each embodiment, the elastic member assembly and the valve main body are fitted by screwing the external thread portion and the internal thread portion, but it may be configured such that there is no external thread portion and internal thread portion, and the elastic The cylindrical portion of the component assembly and the valve main body are respectively formed with cylindrical surfaces that fit into each other in the axial direction, and these cylindrical surfaces are fitted into each other in the axial direction. In this case, when adjusting the set pressure, use a jig that holds the elastic member assembly and the valve main body, and adjust the elastic member assembly and the valve body while supplying fluid at a pressure corresponding to the target set pressure from the primary side joint. The relative displacement amount in the axial direction of the main body is fixed when the valve port is in the closed state. Then, at the welding portion, the elastic member assembly and the valve main body are fixed. In this way, the setting work of adjusting the set pressure becomes easy.
另外,在各实施方式中,对弹性部件为膜片的情况进行了说明,但该弹性部件也可以是波纹管等。In addition, in each embodiment, the case where the elastic member is a diaphragm has been described, but the elastic member may be a bellows or the like.
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CN114645961A (en) * | 2020-12-21 | 2022-06-21 | 株式会社鹭宫制作所 | Pressure regulating valve |
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JP5970426B2 (en) | 2016-08-17 |
JP2015010655A (en) | 2015-01-19 |
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