CN108331965B - A connection structure of a ceramic valve core and a metal rod and a connection method thereof - Google Patents

A connection structure of a ceramic valve core and a metal rod and a connection method thereof Download PDF

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CN108331965B
CN108331965B CN201810116874.1A CN201810116874A CN108331965B CN 108331965 B CN108331965 B CN 108331965B CN 201810116874 A CN201810116874 A CN 201810116874A CN 108331965 B CN108331965 B CN 108331965B
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metal rod
valve core
hole
bolt
ceramic
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CN108331965A (en
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张玉强
杨金晶
刘学建
陈忠明
黄政仁
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Shanghai Institute of Ceramics of CAS
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Shanghai Institute of Ceramics of CAS
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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
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus

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  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)
  • Sliding Valves (AREA)

Abstract

The invention relates to a connecting structure of a ceramic valve core and a metal rod and a connecting method thereof, wherein the connecting structure of the ceramic valve core and the metal rod is characterized in that the tail part of the valve core (1) is formed into a convex shape, the head part of the metal rod (2) is formed into a concave shape, the tail part of the valve core (1) and the head part of the metal rod (2) are respectively provided with a through hole (3, 4), and the two through holes (3, 4) are concentric; wherein, one side of the through hole (4) at the head part of the metal rod (2) is provided with an internal thread (5), and the other side is provided with a stepped hole (6) for screwing in a nut; after the valve core (1) is matched with the metal rod (2), the two through holes (3 and 4) are aligned, and the bolt (7) is screwed in, so that the valve core (1) is fixedly connected with the metal rod (2).

Description

一种陶瓷阀芯与金属杆的连接结构及其连接方法A connection structure of a ceramic valve core and a metal rod and a connection method thereof

技术领域technical field

本发明涉及工程陶瓷材料技术领域，特别涉及一种陶瓷阀芯与金属杆连接结构及其连接方法。The invention relates to the technical field of engineering ceramic materials, in particular to a connection structure of a ceramic valve core and a metal rod and a connection method thereof.

背景技术Background technique

黑水调节阀作为煤化工领域一种调节黑水流量和压力的特种阀门，工作环境温度可达300℃。其阀芯基体材质为314不锈钢、316不锈钢、整体烧结碳化钨或碳化硅陶瓷等耐磨材质，与阀芯相连的金属杆为普通不锈钢材质。As a special valve for adjusting the flow and pressure of black water in the coal chemical industry, the working environment temperature can reach 300℃. The base material of the valve core is 314 stainless steel, 316 stainless steel, integral sintered tungsten carbide or silicon carbide ceramics and other wear-resistant materials, and the metal rod connected to the valve core is made of ordinary stainless steel.

当阀芯基体材质为314不锈钢、316不锈钢或者整体烧结碳化钨时，阀芯与金属杆的连接为阀芯内螺纹、金属杆外螺纹或阀芯外螺纹、金属杆内螺纹的螺纹连接方式。When the base material of the valve core is 314 stainless steel, 316 stainless steel or integral sintered tungsten carbide, the connection between the valve core and the metal rod is the threaded connection method of the valve core internal thread, the metal rod external thread or the valve core external thread and the metal rod internal thread.

当阀芯为碳化硅陶瓷时，由于碳化硅陶瓷螺纹的难加工性及高温工作环境下陶瓷与金属杆膨胀系数的不匹配性，导致碳化硅陶瓷的阀芯与金属杆螺纹连接的连接方式不可行。When the valve core is silicon carbide ceramics, due to the difficulty of machining the silicon carbide ceramic threads and the mismatch of the expansion coefficient of the ceramic and the metal rod under the high temperature working environment, the connection method of the silicon carbide ceramic valve core and the metal rod thread connection cannot be Row.

发明内容SUMMARY OF THE INVENTION

针对上述问题，本发明所要解决的技术问题在于提供了一种陶瓷阀芯与金属杆连接结构及其连接方法，结构简单，连接牢固。In view of the above problems, the technical problem to be solved by the present invention is to provide a connecting structure of a ceramic valve core and a metal rod and a connecting method thereof, which are simple in structure and firm in connection.

为了解决上述技术问题，一方面本发明提供了一种陶瓷阀芯与金属杆连接结构，阀芯尾部形成为凸状，金属杆头部形成为凹状，阀芯尾部与金属杆头部各设有一个通孔，两通孔同心；其中金属杆头部通孔的一侧设有内螺纹，另一侧设有供螺帽旋入的阶梯孔；将阀芯与金属杆配合后，两通孔对齐，旋入螺栓，使阀芯与金属杆紧固连接。In order to solve the above technical problems, on the one hand, the present invention provides a connection structure between a ceramic valve core and a metal rod. The tail of the valve core is formed into a convex shape, and the head of the metal rod is formed into a concave shape. One through hole, the two through holes are concentric; one side of the through hole of the metal rod head is provided with an internal thread, and the other side is provided with a stepped hole for screwing the nut; after the valve core is matched with the metal rod, the two through holes are Align and screw in the bolts to securely connect the valve core with the metal rod.

根据本发明，能发挥以下有益效果：该陶瓷阀芯与金属杆连接结构构造简单，安装拆卸方便，工作可靠，避免了陶瓷螺纹的加工，也避免了高温工作条件下陶瓷与金属螺纹连接易因膨胀系数不匹配导致的崩断问题。According to the present invention, the following beneficial effects can be exerted: the connection structure of the ceramic valve core and the metal rod is simple, the installation and disassembly are convenient, the operation is reliable, the processing of the ceramic thread is avoided, and the easy connection between the ceramic and the metal thread under high temperature working conditions is avoided. Breaking problems caused by mismatched expansion coefficients.

较佳地，阀芯尾部凸状部分与金属杆头部凹状部分为紧配合，配合部分长度不短于30mm。较长的连接空间可以容许具有直径较大的金属螺栓，进而保证连接强度。Preferably, the convex part at the tail of the valve core and the concave part at the head of the metal rod are in tight fit, and the length of the fitting part is not less than 30mm. The longer connection space can accommodate metal bolts with larger diameters, thereby ensuring the connection strength.

较佳地，阀芯尾部凸状部分的外径尺寸与凸状部分长度之比为0.5-1.2。Preferably, the ratio of the outer diameter of the convex portion at the tail of the valve core to the length of the convex portion is 0.5-1.2.

较佳地，阀芯尾部的通孔的内径尺寸与阀芯的凸状部分的外径尺寸之比为0.10-0.40。Preferably, the ratio of the inner diameter of the through hole at the tail of the valve core to the outer diameter of the convex portion of the valve core is 0.10-0.40.

较佳地，螺栓可以为金属螺栓，优选为低膨胀金属材质，更优选为殷钢或钛合金材质。以使在高温工作环境下，降低金属螺杆膨胀导致陶瓷阀芯内孔胀裂的隐患。Preferably, the bolts can be metal bolts, preferably low-expansion metal materials, more preferably invar or titanium alloy materials. In order to reduce the hidden danger of the inner hole of the ceramic valve core caused by the expansion of the metal screw under the high temperature working environment.

较佳地，螺栓的外径与金属杆的头部的通孔中设有阶梯孔的一侧为紧配合，与设有内螺纹的一侧为螺纹配合。保证螺栓与陶瓷阀芯的相对位置固定。Preferably, the outer diameter of the bolt is in tight fit with the side provided with the stepped hole in the through hole of the head of the metal rod, and is in threaded fit with the side provided with the internal thread. Ensure that the relative position of the bolt and the ceramic valve core is fixed.

较佳地，螺栓前后两端均为弧形，旋入金属杆尾部的通孔后，两侧均不突出。在螺栓端面与阀芯表面紧密贴合的同时，保证阀芯可上下自由滑动。Preferably, the front and rear ends of the bolt are arc-shaped, and after being screwed into the through hole at the tail of the metal rod, neither side protrudes. While the end face of the bolt is closely attached to the surface of the valve core, the valve core can be freely slid up and down.

较佳地，螺栓的外螺纹长度不超过金属杆头部的通孔一侧的内螺纹长度。保证螺栓与陶瓷阀芯连接部分全部为紧配合。Preferably, the length of the external thread of the bolt does not exceed the length of the internal thread on the side of the through hole of the metal rod head. Make sure that the connection parts between the bolts and the ceramic valve core are all tight fit.

较佳地，螺栓在阀芯尾部通孔内部的部分表面光滑，其外径与阀芯尾部通孔的内径为紧配合。保证螺栓与陶瓷阀芯尾部连接后的整体性，以使金属杆上下动作时，螺栓与阀芯尾部不出现松动。Preferably, a part of the surface of the bolt inside the through hole at the tail of the valve core is smooth, and the outer diameter of the bolt is a tight fit with the inner diameter of the through hole at the tail of the valve core. Ensure the integrity of the bolt and the tail of the ceramic spool, so that when the metal rod moves up and down, the bolt and the tail of the spool do not loosen.

另一方面，本发明还提供了一种陶瓷阀芯与金属杆连接方法，按以下步骤进行：将阀芯尾部做成凸状，金属杆头部做成凹状，阀芯尾部与金属杆头部各有一通孔，两通孔同心；金属杆头部通孔一侧设有内螺纹，另一侧设有供螺栓螺帽旋入的阶梯孔；将阀芯尾部与金属杆头部旋入配合，至两通孔对齐，将螺栓旋入同心通孔中，使阀芯与金属杆紧固连接。On the other hand, the present invention also provides a method for connecting a ceramic valve core and a metal rod. Each has a through hole, and the two through holes are concentric; one side of the through hole of the metal rod head is provided with an internal thread, and the other side is provided with a stepped hole for screwing the bolt and nut; the tail of the valve core and the head of the metal rod are screwed to fit , until the two through holes are aligned, and screw the bolts into the concentric through holes, so that the valve core and the metal rod are tightly connected.

优选地，螺栓与金属杆头部通孔中设有内螺纹一侧为螺纹连接，与阀芯尾部通孔为紧配合连接，与金属杆头部通孔中设有阶梯孔一侧为紧配合连接；螺栓旋入同心通孔后，两端均不突出。Preferably, the bolt is threadedly connected to the side provided with the internal thread in the through hole of the metal rod head, is tightly fitted with the through hole at the tail of the valve core, and is tightly fitted with the side provided with the stepped hole in the through hole of the metal rod head. Connection; after the bolt is screwed into the concentric through hole, both ends do not protrude.

附图说明Description of drawings

图1为本发明一实施形态的陶瓷阀芯与金属杆连接结构的构造示意图。FIG. 1 is a schematic structural diagram of a connection structure of a ceramic valve core and a metal rod according to an embodiment of the present invention.

具体实施方式Detailed ways

针对现有技术中，当阀芯为碳化硅陶瓷时，由于碳化硅陶瓷螺纹的难加工性及高温工作环境下陶瓷与金属杆膨胀系数的不匹配性，导致碳化硅陶瓷的阀芯与金属杆螺纹连接的连接方式不可行的问题。本发明提供了一种陶瓷阀芯与金属杆连接结构，阀芯尾部形成为凸状，金属杆头部形成为凹状，阀芯尾部与金属杆头部各设有一个通孔，两通孔同心；其中金属杆头部通孔的一侧设有内螺纹，另一侧设有供螺帽旋入的阶梯孔；将阀芯与金属杆配合后，两通孔对齐，旋入螺栓，使阀芯与金属杆紧固连接。In view of the prior art, when the valve core is made of silicon carbide ceramics, due to the intractability of the silicon carbide ceramic thread and the mismatch of the expansion coefficient of the ceramic and the metal rod under the high temperature working environment, the valve core and the metal rod of the silicon carbide ceramic are caused. The problem that the connection method of the threaded connection is not feasible. The invention provides a connection structure between a ceramic valve core and a metal rod. The tail of the valve core is formed into a convex shape, and the head of the metal rod is formed into a concave shape. The tail of the valve core and the head of the metal rod are each provided with a through hole, and the two through holes are concentric ; One side of the through hole of the metal rod head is provided with an internal thread, and the other side is provided with a stepped hole for screwing the nut; after the valve core is matched with the metal rod, the two through holes are aligned, and the bolt is screwed in to make the valve The core is tightly connected with the metal rod.

下面结合具体实施例和附图对本发明做进一步详细的说明。The present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.

图1为本发明一实施形态的陶瓷阀芯与金属杆连接结构的构造示意图。如图1所示，本实施形态的陶瓷阀芯与金属杆连接结构，阀芯1尾部做成凸状，金属杆2头部为凹状，阀芯1尾部与金属杆2头部各有一个通孔3、4，两通孔3、4同心。其中金属杆2头部通孔一侧有内螺纹5，另一侧有供螺帽旋入的阶梯孔6。将阀芯1与金属杆2配合后，两通孔3、4对齐，旋入螺栓7，使阀芯1与金属杆2紧固连接。FIG. 1 is a schematic structural diagram of a connection structure of a ceramic valve core and a metal rod according to an embodiment of the present invention. As shown in Figure 1, in the connection structure of the ceramic valve core and the metal rod of this embodiment, the tail of the valve core 1 is convex, the head of the metal rod 2 is concave, and the tail of the valve core 1 and the head of the metal rod 2 each have a connection Holes 3 and 4, and the two through holes 3 and 4 are concentric. One side of the through hole of the head of the metal rod 2 is provided with an internal thread 5, and the other side is provided with a stepped hole 6 into which the nut is screwed. After the valve core 1 is matched with the metal rod 2, the two through holes 3 and 4 are aligned, and the bolt 7 is screwed in, so that the valve core 1 and the metal rod 2 are tightly connected.

阀芯1尾部凸状部分与金属杆2头部凹状部分为紧配合，配合部分长度为40mm。阀芯1尾部凸出部分外径尺寸与凸出部分长度之比为1.2。阀芯1尾部通孔3内径尺寸与阀芯1凸出部分外径尺寸之比约为0.13。The convex part of the tail of the valve core 1 and the concave part of the head of the metal rod 2 are tightly fitted, and the length of the fitting part is 40mm. The ratio of the outer diameter of the protruding part at the tail of the valve core 1 to the length of the protruding part is 1.2. The ratio of the inner diameter of the through hole 3 at the tail of the valve core 1 to the outer diameter of the protruding part of the valve core 1 is about 0.13.

螺栓7为金属螺栓，在本实施形态中，例如可以是殷钢4j36材质。螺栓7外径与金属杆2头部通孔4有阶梯孔6一侧为紧配合，与有内螺纹5一侧为螺纹配合。螺栓7前后两端均为弧形，旋入金属杆2尾部通孔4后，两侧均不突出。具体地，螺栓7外螺纹长度与金属杆2头部通孔一侧的内螺纹5长度相等。且螺栓7在阀芯1尾部通孔3内部的部分表面光滑，其外径与阀芯1尾部通孔3内径为紧配合。The bolts 7 are metal bolts, and in the present embodiment, may be made of invar 4j36, for example. The outer diameter of the bolt 7 is in tight fit with the side with the stepped hole 6 of the through hole 4 of the head of the metal rod 2 , and is in threaded fit with the side with the inner thread 5 . The front and rear ends of the bolt 7 are arc-shaped, and after being screwed into the through hole 4 at the tail of the metal rod 2, neither side protrudes. Specifically, the length of the external thread of the bolt 7 is equal to the length of the internal thread 5 on the side of the through hole of the head of the metal rod 2 . And part of the surface of the bolt 7 inside the through hole 3 at the tail of the valve core 1 is smooth, and the outer diameter of the bolt 7 is a tight fit with the inner diameter of the through hole 3 at the tail of the valve core 1 .

进一步而言，本发明的上述陶瓷阀芯与金属杆连接结构，可按以下步骤进行连接：将陶瓷阀芯1尾部做成凸状，金属杆2头部做成凹状，阀芯尾部与金属杆头部各有一通孔3、4，两通孔3、4同心。其中金属杆2头部通孔一侧有内螺纹5，另一侧有供金属螺栓7螺帽旋入的阶梯孔6。将阀芯1尾部与金属杆2头部旋入配合，至两通孔3、4对齐，将低膨胀金属材质的螺栓7旋入同心通孔3、4中。金属螺栓7与金属杆2头部通孔有内螺纹5一侧为螺纹连接，与陶瓷阀芯1尾部通孔3为紧配合连接，与金属杆2头部通孔4有阶梯孔6一侧为紧配合连接。金属螺栓7旋入同心通孔3、4后，两端均不突出。Further, the connection structure of the ceramic valve core and the metal rod of the present invention can be connected according to the following steps: the tail of the ceramic valve core 1 is made into a convex shape, the head of the metal rod 2 is made into a concave shape, and the tail of the valve core and the metal rod are made into a concave shape. The head has a through hole 3 and 4 respectively, and the two through holes 3 and 4 are concentric. One side of the through hole of the head of the metal rod 2 is provided with an internal thread 5, and the other side is provided with a stepped hole 6 into which the nut of the metal bolt 7 is screwed. Screw the tail of the valve core 1 and the head of the metal rod 2 to match until the two through holes 3 and 4 are aligned, and screw the low-expansion metal bolt 7 into the concentric through holes 3 and 4. The metal bolt 7 is connected with the inner thread 5 of the head through hole of the metal rod 2, which is threadedly connected to the side of the through hole 3 at the tail of the ceramic valve core 1. For a tight fit connection. After the metal bolts 7 are screwed into the concentric through holes 3 and 4, both ends do not protrude.

上述是针对本发明实施例的具体说明，应当指出本发明范围并不限于本实施实例，凡未脱离本发明做出的相似变更和改进，均应包含于本发明的专利范围中。The above is a specific description for the embodiments of the present invention. It should be pointed out that the scope of the present invention is not limited to the embodiments of the present invention. Any similar changes and improvements made without departing from the present invention should be included in the patent scope of the present invention.

Claims (8)

1. A structure for connecting a ceramic valve core and a metal rod of a black water regulating valve is characterized in that the tail of the ceramic valve core (1) is formed into a convex shape, the head of the metal rod (2) is formed into a concave shape, and the tail of the ceramic valve core (1) and the head of the metal rod (2) are respectively provided with a through hole which are concentric; wherein, one side of the through hole (4) at the head part of the metal rod (2) is provided with an internal thread (5), and the other side is provided with a stepped hole (6) for screwing in a nut; after the ceramic valve core (1) is matched with the metal rod (2), two through holes are aligned, and a bolt (7) is screwed in to enable the ceramic valve core (1) and the metal rod (2) to be fastened and connected, wherein the bolt (7) is a metal bolt; the convex part of the tail part of the ceramic valve core (1) is tightly matched with the concave part of the head part of the metal rod (2), the outer diameter of the bolt (7) is tightly matched with one side, provided with the stepped hole (6), of the through hole (4) of the head part of the metal rod (2), and is in threaded fit with one side, provided with the internal thread (5); the length of the external thread of the bolt (7) does not exceed the length of the internal thread (5) on one side of the through hole (4) at the head of the metal rod (2); the surface of the part of the bolt (7) in the through hole (3) at the tail part of the ceramic valve core (1) is smooth, and the outer diameter of the bolt is tightly matched with the inner diameter of the through hole (3) at the tail part of the ceramic valve core (1).
2. The black water regulating valve ceramic spool and metal rod connecting structure according to claim 1, wherein the length of the fitting portion of the close fit of the convex portion of the tail of the ceramic spool (1) and the concave portion of the head of the metal rod (2) is not shorter than 30 mm.
3. The black water regulating valve ceramic spool and metal rod connecting structure according to claim 1, wherein the ratio of the outer diameter dimension of the convex portion of the tail of the ceramic spool (1) to the length of the convex portion is 0.5 to 1.2.
4. The black water regulating valve ceramic spool and metal rod connecting structure according to claim 1, wherein the ratio of the inner diameter dimension of the through hole (3) of the tail portion of the ceramic spool (1) to the outer diameter dimension of the convex portion of the ceramic spool (1) is 0.10 to 0.40.
5. The structure for connecting the ceramic valve core and the metal rod of the black water regulating valve according to claim 1, wherein the front end and the rear end of the bolt (7) are both arc-shaped, and both sides of the bolt do not protrude after being screwed into the through hole (4) at the tail of the metal rod (2).
6. The black water regulating valve ceramic spool and metal rod connecting structure according to claim 1, wherein the bolt (7) is made of low expansion metal.
7. The structure for connecting the ceramic valve core and the metal rod of the black water regulating valve according to claim 1, wherein the bolt (7) is made of invar steel or titanium alloy.
8. A method for connecting a ceramic valve core and a metal rod of a black water regulating valve is characterized in that the method adopts the connecting structure of the ceramic valve core and the metal rod of any one of claims 1 to 7 and comprises the following steps:
the tail of the ceramic valve core (1) is made into a convex shape, the head of the metal rod (2) is made into a concave shape, the tail of the ceramic valve core (1) and the head of the metal rod (2) are respectively provided with a through hole, the two through holes are concentric, and the bolt (7) is a metal bolt;
one side of the through hole of the head of the metal rod (2) is provided with an internal thread (5), and the other side is provided with a stepped hole (6) for screwing a screw cap of a bolt (7);
screwing the tail part of the ceramic valve core (1) and the head part of the metal rod (2) into fit until the two through holes are aligned, and screwing a bolt (7) into the concentric through holes to enable the ceramic valve core (1) and the metal rod (2) to be fixedly connected;
the bolt (7) is in threaded connection with one side of the through hole (4) in the head of the metal rod (2) provided with the internal thread (5), is in close fit connection with the through hole (3) in the tail of the ceramic valve core (1), and is in close fit connection with one side of the through hole (4) in the head of the metal rod (2) provided with the stepped hole (6);
after the bolt (7) is screwed into the concentric through hole, both ends are not protruded.
CN201810116874.1A 2018-02-06 2018-02-06 A connection structure of a ceramic valve core and a metal rod and a connection method thereof Active CN108331965B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2645798A1 (en) * 1976-10-09 1978-04-13 Haendle & Soehne Karl Double shaft mixer for ceramic materials - with easy adjustment of mixing length using insertable screw elements
JPS62278379A (en) * 1986-05-28 1987-12-03 Mitsubishi Heavy Ind Ltd Control valve
CN202188150U (en) * 2011-06-21 2012-04-11 温州市中力阀门有限公司 Connecting structure of valve rod and ball body of ceramic sealing ball valve
CN202252047U (en) * 2011-09-06 2012-05-30 浙江正华阀门厂 Pneumatic ceramic sealing parallel gate valve
CN103603961A (en) * 2013-11-26 2014-02-26 浙江万龙机械有限公司 Ceramic valve
CN203770700U (en) * 2014-04-11 2014-08-13 浙江艾迪西流体控制股份有限公司 Valve element assembly
CN206874849U (en) * 2017-07-11 2018-01-12 杭州中美埃梯梯泵业有限公司 A kind of hand stop valve with ceramic seal chip

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2645798A1 (en) * 1976-10-09 1978-04-13 Haendle & Soehne Karl Double shaft mixer for ceramic materials - with easy adjustment of mixing length using insertable screw elements
JPS62278379A (en) * 1986-05-28 1987-12-03 Mitsubishi Heavy Ind Ltd Control valve
CN202188150U (en) * 2011-06-21 2012-04-11 温州市中力阀门有限公司 Connecting structure of valve rod and ball body of ceramic sealing ball valve
CN202252047U (en) * 2011-09-06 2012-05-30 浙江正华阀门厂 Pneumatic ceramic sealing parallel gate valve
CN103603961A (en) * 2013-11-26 2014-02-26 浙江万龙机械有限公司 Ceramic valve
CN203770700U (en) * 2014-04-11 2014-08-13 浙江艾迪西流体控制股份有限公司 Valve element assembly
CN206874849U (en) * 2017-07-11 2018-01-12 杭州中美埃梯梯泵业有限公司 A kind of hand stop valve with ceramic seal chip

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