CN110608296A - A hemispherical metal-sealed fixed ball valve with jacket - Google Patents
A hemispherical metal-sealed fixed ball valve with jacket Download PDFInfo
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- CN110608296A CN110608296A CN201910857374.8A CN201910857374A CN110608296A CN 110608296 A CN110608296 A CN 110608296A CN 201910857374 A CN201910857374 A CN 201910857374A CN 110608296 A CN110608296 A CN 110608296A
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- valve
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- valve body
- fixed ball
- sealed fixed
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- 210000004907 gland Anatomy 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 17
- 239000012530 fluid Substances 0.000 abstract description 16
- 239000012535 impurity Substances 0.000 abstract description 8
- 238000002425 crystallisation Methods 0.000 abstract description 4
- 230000008025 crystallization Effects 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
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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
- F16K49/00—Means in or on valves for heating or cooling
- F16K49/005—Circulation means for a separate heat transfer fluid
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Taps Or Cocks (AREA)
- Lift Valve (AREA)
Abstract
本发明公开了球阀技术领域的一种带夹套的半球体金属密封固定球阀，旨在解决现有技术中流体内的杂质及流体的结晶体对密封副造成损伤，降低阀门的使用寿命的技术问题，阀体内设有阀芯，设置在阀体上部的阀杆驱动阀芯以设置在阀体下部的枢轴为轴转动实现阀门的开启和关闭，阀芯为半球体状，阀门关闭后阀芯的球面与阀座配合形成密封，阀芯的非球面侧与阀体形成空腔；阀座设置在阀盖内，阀座与所述阀盖之间设有圆柱弹簧，阀盖与阀体连接；阀体外侧设置夹套，导热介质从设置在夹套上的进口端流入夹套，从设置在夹套上的出口端流出夹套。改善了阀门的运行环境，避免了流体内的杂质及流体的结晶体对阀门密封副造成的磨损，延长了阀门的使用寿命。
The invention discloses a hemispherical metal-sealed fixed ball valve with a jacket in the technical field of ball valves, aiming to solve the technical problems in the prior art that impurities in the fluid and crystals of the fluid cause damage to the sealing pair and reduce the service life of the valve. There is a valve core in the valve body, and the valve stem set on the upper part of the valve body drives the valve core to rotate on the pivot shaft set on the lower part of the valve body to realize the opening and closing of the valve. The valve core is in the shape of a hemisphere. The spherical surface cooperates with the valve seat to form a seal, and the aspherical side of the valve core forms a cavity with the valve body; the valve seat is arranged in the valve cover, and a cylindrical spring is arranged between the valve seat and the valve cover, and the valve cover is connected to the valve body; A jacket is arranged on the outside of the valve body, and the heat transfer medium flows into the jacket from the inlet port arranged on the jacket, and flows out of the jacket from the outlet port arranged on the jacket. The operating environment of the valve is improved, the impurity in the fluid and the crystallization of the fluid are avoided from wearing and tearing on the sealing pair of the valve, and the service life of the valve is prolonged.
Description
技术领域technical field
本发明属于球阀技术领域，具体涉及一种带夹套的半球体金属密封固定球阀。The invention belongs to the technical field of ball valves, in particular to a hemispherical metal-sealed fixed ball valve with a jacket.
背景技术Background technique
球阀广泛应用于石油、化工、钢铁、冶金和电力等各个领域，球阀具有介质阻力小、操作方便等优点。但在输送易于结晶的物料，如尿素等，或者粘稠流体，如含蜡质和沥青较高的石油等场合的情况下，由于物料的沉淀、结晶会在密封面上产生沉积物，造成阀门密封失效。流体中不可避免的会有部分杂质存在，传统的球体状阀芯在开、闭的过程中，流体内的杂质容易被代入阀芯中腔，久而久之就会对阀门的密封副造成磨损，降低阀门的使用寿命。Ball valves are widely used in various fields such as petroleum, chemical industry, steel, metallurgy and electric power. Ball valves have the advantages of small medium resistance and convenient operation. However, in the case of conveying materials that are easy to crystallize, such as urea, etc., or viscous fluids, such as oil with high waxy and asphalt content, due to the precipitation and crystallization of materials, deposits will be generated on the sealing surface, resulting in valves Seal failure. There will inevitably be some impurities in the fluid. During the opening and closing process of the traditional spherical valve core, the impurities in the fluid are easily substituted into the valve core cavity, which will cause wear to the sealing pair of the valve over time, reducing the valve service life.
发明内容Contents of the invention
本发明的目的在于提供一种带夹套的半球体金属密封固定球阀，以解决现有技术中流体内的杂质及流体的结晶体对密封副造成损伤，降低阀门的使用寿命的技术问题。The purpose of the present invention is to provide a hemispherical metal-sealed fixed ball valve with a jacket to solve the technical problem in the prior art that the impurities in the fluid and the crystals of the fluid cause damage to the sealing pair and reduce the service life of the valve.
为达到上述目的，本发明所采用的技术方案是：一种带夹套的半球体金属密封固定球阀，包括阀体，所述阀体内设有阀芯，设置在所述阀体上部的阀杆驱动所述阀芯以设置在所述阀体下部的枢轴为轴转动实现阀门的开启和关闭，所述阀芯为半球体状，阀门关闭后所述阀芯的球面与阀座配合形成密封，所述阀芯的非球面侧与所述阀体形成空腔；所述阀座设置在阀盖内，所述阀座与所述阀盖之间设有圆柱弹簧，所述阀盖与所述阀体连接；所述阀体外侧设置夹套，导热介质从设置在所述夹套上的进口端流入夹套，从设置在所述夹套上的出口端流出夹套。In order to achieve the above purpose, the technical solution adopted by the present invention is: a hemispherical metal-sealed fixed ball valve with a jacket, including a valve body, a valve core is arranged in the valve body, and a valve stem arranged on the upper part of the valve body The valve core is driven to rotate around the pivot shaft arranged at the lower part of the valve body to realize the opening and closing of the valve. The valve core is in the shape of a hemisphere. After the valve is closed, the spherical surface of the valve core cooperates with the valve seat to form a seal. , the aspherical side of the valve core forms a cavity with the valve body; the valve seat is arranged in the valve cover, and a cylindrical spring is arranged between the valve seat and the valve cover, and the valve cover and the valve cover The valve body is connected; the outer side of the valve body is provided with a jacket, the heat transfer medium flows into the jacket from the inlet port provided on the jacket, and flows out of the jacket from the outlet port provided on the jacket.
所述阀杆与所述阀体之间设有压盖法兰。A gland flange is provided between the valve stem and the valve body.
所述压盖法兰与所述阀杆之间设有推力垫片。A thrust gasket is provided between the gland flange and the valve stem.
所述夹套焊接在阀体上。The jacket is welded on the valve body.
所述压盖法兰与所述阀体之间设有石墨垫片Ⅰ。A graphite gasket I is provided between the gland flange and the valve body.
所述枢轴与所述阀体之间设有石墨垫片Ⅱ。A graphite gasket II is arranged between the pivot shaft and the valve body.
所述阀座与所述阀盖之间设有O型圈Ⅰ。An O-ring I is provided between the valve seat and the valve cover.
所述阀盖和所述阀体为螺纹连接。The valve cover and the valve body are threaded.
所述导热介质包括导热油和水。The heat transfer medium includes heat transfer oil and water.
与现有技术相比，本发明所达到的有益效果：Compared with the prior art, the beneficial effects achieved by the present invention are as follows:
（1）本发明所述带夹套的半球体金属密封固定球阀，通过采用半球体阀芯与阀体形成空腔同时设置夹套伴热增加流体的流动性，减少流体结晶，从而改善了阀门的运行环境，避免了流体内的杂质及流体的结晶体对阀门密封副造成的磨损，延长了阀门的使用寿命；(1) The hemispherical metal-sealed fixed ball valve with jacket described in the present invention adopts the hemispherical valve core and the valve body to form a cavity, and at the same time sets the jacket with heat tracing to increase fluid fluidity and reduce fluid crystallization, thereby improving the valve The operating environment avoids the wear of the valve sealing pair caused by the impurities in the fluid and the crystals of the fluid, and prolongs the service life of the valve;
（2）本发明所述带夹套的半球体金属密封固定球阀，通过在压盖法兰与阀体之间和枢轴与阀体之间分别设置石墨垫片的方式提高了阀门在高温环境下的密封效果。(2) The jacketed hemispherical metal-sealed fixed ball valve of the present invention improves the performance of the valve in high-temperature environments by setting graphite gaskets between the gland flange and the valve body and between the pivot and the valve body respectively. under the sealing effect.
附图说明Description of drawings
图1是本发明实施例提供的一种带夹套的半球体金属密封固定球阀在开启状态时的纵向剖面示意图；Fig. 1 is a longitudinal sectional schematic diagram of a jacketed hemispherical metal-sealed fixed ball valve in an open state provided by an embodiment of the present invention;
图2是本发明实施例提供的一种带夹套的半球体金属密封固定球阀在关闭状态时的横向剖面示意图；Fig. 2 is a schematic transverse cross-sectional view of a jacketed hemispherical metal-sealed fixed ball valve in a closed state provided by an embodiment of the present invention;
图中：1.阀体；2.阀盖；3.阀座；4.阀芯；5.枢轴；6.阀杆；7.压盖法兰；8.圆柱弹簧；9.O型圈Ⅰ；10.夹套；11.进口端；12.出口端；13.O型圈Ⅳ；14.石墨垫片Ⅱ；15. O型圈Ⅱ；16.石墨垫片Ⅰ；17.O型圈Ⅲ；18.推力垫片；19.空腔。In the figure: 1. Valve body; 2. Bonnet; 3. Valve seat; 4. Valve core; 5. Pivot; 6. Valve stem; 7. Gland flange; 8. Cylindrical spring; 9. O-ring Ⅰ; 10. Jacket; 11. Inlet port; 12. Outlet port; 13. O-ring Ⅳ; 14. Graphite gasket Ⅱ; 15. O-ring Ⅱ; 16. Graphite gasket Ⅰ; 17. O-ring Ⅲ; 18. Thrust gasket; 19. Cavity.
具体实施方式Detailed ways
下面结合附图对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
需要说明的是，在本发明的描述中，术语“前”、“后”、“左”、“右”、“上”、“下”、“内”、“外”等指示的方位或位置关系为基于附图中所示的方位或位置关系，仅是为了便于描述本发明而不是要求本发明必须以特定的方位构造和操作，因此不能理解为对本发明的限制。本发明描述中使用的术语“前”、“后”、“左”、“右”、“上”、“下”指的是附图中的方向，术语“内”、“外”分别指的是朝向或远离特定部件几何中心的方向。It should be noted that, in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer" and the like indicate orientations or positions The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and does not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. The terms "front", "rear", "left", "right", "upper" and "lower" used in the description of the present invention refer to the directions in the drawings, and the terms "inner" and "outer" refer to is the direction towards or away from the geometric center of a particular part.
如图1、图2所示，阀体1内设有阀芯4，阀芯4为半球体状，阀芯4上部设有阀杆槽，阀杆6由阀体1上部插入阀杆槽内，阀芯4下部设有枢轴孔，枢轴5由阀体1下部插入枢轴孔内，阀杆6驱动阀芯4以枢轴5为轴转动实现阀门的开启和关闭。在阀体1的一侧设有阀座3，阀门关闭后阀芯4的球面与阀座3配合形成密封，阀芯4的非球面侧与阀体1形成空腔19，半球体--单阀座结构使阀门中腔不易带入杂质，降低流体内的杂质对密封副的磨损，延长阀门的使用寿命。阀座3安装在阀盖2内，阀盖2与阀体1采用螺纹连接，螺纹连接减短阀门的安装长度、减轻阀门重量。在阀盖2与阀体1之间设有圆柱弹簧8和O型圈Ⅰ9，O型圈Ⅰ9增强阀座3与阀盖2区域的密封性能，安装时，将装好圆柱弹簧8和O型圈Ⅰ9的阀座3放入阀盖孔内，然后用工装将带有螺纹的阀盖2安装在阀体1内并进行预紧。圆柱弹簧8保证阀芯4与阀座3的初始密封，而下游带螺纹的阀盖2可以弥补由于阀芯4与阀座3配合不好产生的阀门密封泄漏问题，同时随着运行时间的延长，阀芯4与阀座3的密封面会出现磨损，而圆柱弹簧8对阀座3始终存在一个正压力，将阀座3压向阀芯4，从而保证密封效果，延长阀门使用寿命。As shown in Figure 1 and Figure 2, there is a valve core 4 inside the valve body 1, the valve core 4 is hemispherical, the upper part of the valve core 4 is provided with a stem groove, and the valve stem 6 is inserted into the valve stem groove from the upper part of the valve body The lower part of the spool 4 is provided with a pivot hole, the pivot 5 is inserted into the pivot hole from the lower part of the valve body 1, and the valve stem 6 drives the spool 4 to rotate around the pivot 5 to realize the opening and closing of the valve. There is a valve seat 3 on one side of the valve body 1. After the valve is closed, the spherical surface of the valve core 4 cooperates with the valve seat 3 to form a seal. The aspherical side of the valve core 4 forms a cavity 19 with the valve body 1. The valve seat structure makes it difficult for impurities to be brought into the cavity of the valve, reducing the wear of the sealing pair by impurities in the fluid and prolonging the service life of the valve. The valve seat 3 is installed in the bonnet 2, and the bonnet 2 and the valve body 1 are threaded, and the threaded connection shortens the installation length of the valve and reduces the weight of the valve. A cylindrical spring 8 and an O-ring Ⅰ9 are arranged between the valve cover 2 and the valve body 1. The O-ring Ⅰ9 enhances the sealing performance between the valve seat 3 and the valve cover 2. During installation, the cylindrical spring 8 and the O-ring will be installed. The valve seat 3 of ring I9 is put into the valve cover hole, and then the threaded valve cover 2 is installed in the valve body 1 with tooling and pre-tightened. The cylindrical spring 8 ensures the initial seal between the valve core 4 and the valve seat 3, and the downstream threaded bonnet 2 can make up for the valve sealing leakage problem caused by the poor cooperation between the valve core 4 and the valve seat 3, and at the same time, with the extension of the operating time , the sealing surface between the valve core 4 and the valve seat 3 will be worn, and the cylindrical spring 8 always has a positive pressure on the valve seat 3, pressing the valve seat 3 to the valve core 4, so as to ensure the sealing effect and prolong the service life of the valve.
阀体1外侧设置夹套10，通过密封焊接将夹套10焊接在阀体1两侧，并焊接进口端11和出口端12，夹套10可以采用无缝钢管制作后焊接，无缝钢管比铸造的材料更加耐压牢固。导热油、水等导热介质从进口端11流入夹套10，从出口端12流出夹套10，导热介质使阀门维持在相对恒定的温度范围内，保证阀体1内部流通介质的恒温，同时避免阀内的流体结晶，从而保护密封副不会因流体结晶而损坏，延长阀门的使用寿命。A jacket 10 is arranged outside the valve body 1, and the jacket 10 is welded on both sides of the valve body 1 by sealing welding, and the inlet port 11 and the outlet port 12 are welded. The jacket 10 can be made of seamless steel pipe and then welded. The cast material is more pressure-resistant and stronger. Heat-conducting oil, water and other heat-conducting media flow into the jacket 10 from the inlet port 11, and flow out of the jacket 10 from the outlet port 12. The heat-conducting medium keeps the valve in a relatively constant temperature range, ensuring the constant temperature of the circulating medium inside the valve body 1, and avoiding The fluid in the valve crystallizes, thereby protecting the sealing pair from damage due to fluid crystallization, and prolonging the service life of the valve.
阀杆6和阀体1之间设有压盖法兰7，压盖法兰7和阀杆6之间设有推力垫片18，推力垫片18可以减小压盖法兰7和阀杆6之间的摩擦力降低阀门的扭矩。压盖法兰7和阀杆6之间设有O型圈Ⅱ15，压盖法兰7和阀体1之间设有O型圈Ⅲ17和石墨垫片Ⅰ16；枢轴5与阀体1之间设有O型圈Ⅳ13和石墨垫片Ⅱ14。O形圈密封性能可靠，石墨垫片适用于耐高温环境，能增强阀门在高温下的密封性能。A gland flange 7 is provided between the valve stem 6 and the valve body 1, and a thrust gasket 18 is arranged between the gland flange 7 and the valve stem 6. The thrust gasket 18 can reduce the pressure of the gland flange 7 and the valve stem. The friction between 6 reduces the torque of the valve. There is an O-ring II15 between the gland flange 7 and the valve stem 6, an O-ring III17 and a graphite gasket I16 between the gland flange 7 and the valve body 1; between the pivot 5 and the valve body 1 There are O-ring Ⅳ13 and graphite gasket Ⅱ14. The sealing performance of the O-ring is reliable, and the graphite gasket is suitable for high-temperature-resistant environments, which can enhance the sealing performance of the valve at high temperatures.
本实施例的装配顺序为：先将阀芯4放入阀体1内，阀体1上部装入阀杆6对准阀芯4的阀杆槽，阀体1下部插入枢轴5对准阀芯4的枢轴孔，阀杆6处装入压盖法兰7，将装好圆柱弹簧8套好O形圈Ⅰ的阀座3放入阀盖孔内，然后用工装将带有螺纹的阀盖2进行预紧，通过密封焊接将夹套10焊接在阀体1两侧，并焊接进口端11和出口端12；在拆卸时则逆序操作。The assembly sequence of this embodiment is: first put the valve core 4 into the valve body 1, put the valve stem 6 in the upper part of the valve body 1 and align it with the valve stem groove of the valve core 4, and insert the lower part of the valve body 1 into the pivot shaft 5 to align the valve body. The pivot hole of the core 4, the valve stem 6 is installed into the gland flange 7, the valve seat 3 with the cylindrical spring 8 and the O-ring Ⅰ put into the valve cover hole, and then the threaded The valve cover 2 is pre-tightened, and the jacket 10 is welded on both sides of the valve body 1 by sealing welding, and the inlet port 11 and the outlet port 12 are welded; when disassembling, the operation is reversed.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变形，这些改进和变形也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, and it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. It should also be regarded as the protection scope of the present invention.
Claims (9)
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| CN201910857374.8A CN110608296A (en) | 2019-09-11 | 2019-09-11 | A hemispherical metal-sealed fixed ball valve with jacket |
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