CN108331965B - Connecting structure and connecting method of ceramic valve core and metal rod - Google Patents
Connecting structure and connecting method of ceramic valve core and metal rod Download PDFInfo
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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
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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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- General Engineering & Computer Science (AREA)
- 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
Technical Field
The invention relates to the technical field of engineering ceramic materials, in particular to a connecting structure of a ceramic valve core and a metal rod and a connecting method thereof.
Background
The black water regulating valve is used as a special valve for regulating the flow and pressure of black water in the field of coal chemical industry, and the working environment temperature can reach 300 ℃. The valve core substrate is made of wear-resistant materials such as 314 stainless steel, 316 stainless steel, integrally sintered tungsten carbide or silicon carbide ceramic and the like, and the metal rod connected with the valve core is made of common stainless steel.
When the valve core substrate is made of 314 stainless steel, 316 stainless steel or integrally sintered tungsten carbide, the valve core is connected with the metal rod in a threaded connection mode of valve core internal threads, metal rod external threads or valve core external threads and metal rod internal threads.
When the valve core is made of silicon carbide ceramic, the connection mode of the threaded connection of the valve core and the metal rod of the silicon carbide ceramic is not feasible due to the difficult processing property of the silicon carbide ceramic thread and the mismatching property of the expansion coefficients of the ceramic and the metal rod under the high-temperature working environment.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a connecting structure of a ceramic valve core and a metal rod and a connecting method thereof, which have simple structure and firm connection.
In order to solve the technical problems, on one hand, the invention provides a connecting structure of a ceramic valve core and a metal rod, wherein the tail part of the valve core is formed into a convex shape, the head part of the metal rod is formed into a concave shape, the tail part of the valve core and the head part of the metal rod are respectively provided with a through hole, and the two through holes are concentric; wherein, one side of the through hole at the head of the metal rod is provided with internal threads, 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 enable the valve core to be tightly connected with the metal rod.
According to the present invention, the following advantageous effects can be exerted: the ceramic valve core and metal rod connecting structure is simple in structure, convenient to install and detach, reliable in work, capable of avoiding processing of ceramic threads and also capable of avoiding the problem that ceramic and metal threads are easily broken due to the fact that expansion coefficients are not matched under the high-temperature working condition.
Preferably, the convex part at the tail part of the valve core is tightly matched with the concave part at the head part of the metal rod, and the length of the matching part is not shorter than 30 mm. The longer connecting space can allow a metal bolt with a larger diameter to be arranged, and then the connecting strength is ensured.
Preferably, the ratio of the outer diameter dimension of the convex part of the tail part of the valve core to the length of the convex part is 0.5-1.2.
Preferably, the ratio of the inner diameter size of the through hole at the tail part of the valve core to the outer diameter size of the convex part of the valve core is 0.10-0.40.
Preferably, the bolt may be a metal bolt, preferably a low expansion metal material, more preferably an invar or titanium alloy material. So that the hidden trouble that the inner hole of the ceramic valve core is burst due to the expansion of the metal screw is reduced under the high-temperature working environment.
Preferably, the outer diameter of the bolt is tightly matched with one side of the through hole of the head of the metal rod, which is provided with the stepped hole, and is in threaded fit with one side provided with the internal thread. The relative position of the bolt and the ceramic valve core is ensured to be fixed.
Preferably, both ends are the arc around the bolt, and after the through-hole of screw in metal pole afterbody, both sides are not outstanding. When the end face of the bolt is tightly attached to the surface of the valve core, the valve core can be ensured to freely slide up and down.
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 head of the metal rod. The connection part of the bolt and the ceramic valve core is ensured to be in tight fit.
Preferably, the surface of the part of the bolt in the through hole at the tail part of the valve core is smooth, and the outer diameter of the bolt is tightly matched with the inner diameter of the through hole at the tail part of the valve core. The integrity of the bolt after being connected with the tail part of the ceramic valve core is ensured, so that the bolt and the tail part of the valve core are not loosened when the metal rod moves up and down.
On the other hand, the invention also provides a method for connecting the ceramic valve core and the metal rod, which comprises the following steps: the tail part of the valve core is made into a convex shape, the head part of the metal rod is made into a concave shape, the tail part of the valve core and the head part of the metal rod are respectively provided with a through hole, and the two through holes are concentric; one side of the through hole at the head of the metal rod is provided with internal threads, and the other side of the through hole is provided with a stepped hole for screwing a bolt and a nut; and screwing the tail part of the valve core and the head part of the metal rod into fit until the two through holes are aligned, and screwing the bolt into the concentric through holes to enable the valve core and the metal rod to be fixedly connected.
Preferably, the bolt is in threaded connection with one side of the through hole at the head of the metal rod, which is provided with the internal thread, is in close fit connection with the through hole at the tail of the valve core, and is in close fit connection with one side of the through hole at the head of the metal rod, which is provided with the stepped hole; after the bolt is screwed into the concentric through hole, both ends of the bolt are not protruded.
Drawings
Fig. 1 is a schematic structural view of a connection structure of a ceramic valve element and a metal rod according to an embodiment of the present invention.
Detailed Description
The valve core is made of silicon carbide ceramic, and the valve core is made of silicon carbide ceramic. The invention provides a connecting structure of a ceramic valve core and a metal rod, wherein the tail part of the valve core is formed into a convex shape, the head part of the metal rod is formed into a concave shape, the tail part of the valve core and the head part of the metal rod are respectively provided with a through hole, and the two through holes are concentric; wherein, one side of the through hole at the head of the metal rod is provided with internal threads, 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 enable the valve core to be tightly connected with the metal rod.
The present invention will be described in further detail with reference to the following specific embodiments and the accompanying drawings.
Fig. 1 is a schematic structural view of a connection structure of a ceramic valve element and a metal rod according to an embodiment of the present invention. As shown in fig. 1, in the connection structure of the ceramic valve element and the metal rod of the present embodiment, the tail portion of the valve element 1 is convex, the head portion of the metal rod 2 is concave, the tail portion of the valve element 1 and the head portion of the metal rod 2 are respectively provided with one through hole 3, 4, and the two through holes 3, 4 are concentric. Wherein, one side of the through hole 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 the 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.
The convex part at the tail part of the valve core 1 is tightly matched with the concave part at the head part of the metal rod 2, and the length of the matching part is 40 mm. The ratio of the outer diameter of the tail protruding part 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 part of the valve core 1 to the outer diameter of the convex part of the valve core 1 is about 0.13.
The bolt 7 is a metal bolt, 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 one side of the through hole 4 at the head of the metal rod 2, which is provided with the stepped hole 6, and is in threaded fit with one side provided with the internal thread 5. Both ends are the arc around the bolt 7, and after screw in metal pole 2 afterbody through-hole 4, both sides are all not outstanding. 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 the part surface of the bolt 7 in the through hole 3 at the tail part of the 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 valve core 1.
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 part of the ceramic valve core 1 is made into a convex shape, the head part of the metal rod 2 is made into a concave shape, the tail part of the valve core and the head part of the metal rod are respectively provided with a through hole 3 and a through hole 4, and the two through holes 3 and 4 are concentric. Wherein, one side of the through hole 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 a metal bolt 7 and a nut. The tail part of the valve core 1 is screwed and matched with the head part of the metal rod 2 until the two through holes 3 and 4 are aligned, and the bolt 7 made of low-expansion metal is screwed into the concentric through holes 3 and 4. The metal bolt 7 is in threaded connection with one side of the through hole at the head of the metal rod 2, which is provided with the internal thread 5, is in close fit connection with the through hole 3 at the tail of the ceramic valve core 1, and is in close fit connection with one side of the through hole 4 at the head of the metal rod 2, which is provided with the stepped hole 6. After the metal bolt 7 is screwed into the concentric through holes 3 and 4, both ends of the metal bolt are not protruded.
The foregoing is a detailed description of the embodiments of the present invention, and it should be noted that the scope of the present invention is not limited to the embodiments, and similar variations and modifications without departing from the present invention should be included in the claims 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810116874.1A CN108331965B (en) | 2018-02-06 | 2018-02-06 | Connecting structure and connecting method of ceramic valve core and metal rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810116874.1A CN108331965B (en) | 2018-02-06 | 2018-02-06 | Connecting structure and connecting method of ceramic valve core and metal rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108331965A CN108331965A (en) | 2018-07-27 |
| CN108331965B true CN108331965B (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810116874.1A Active CN108331965B (en) | 2018-02-06 | 2018-02-06 | Connecting structure and connecting method of ceramic valve core and metal rod |
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Citations (7)
| 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 |
-
2018
- 2018-02-06 CN CN201810116874.1A patent/CN108331965B/en active Active
Patent Citations (7)
| 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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| Publication number | Publication date |
|---|---|
| CN108331965A (en) | 2018-07-27 |
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