CN203585378U - Self-cleaning gate valve for coal chemical industry - Google Patents
Self-cleaning gate valve for coal chemical industry Download PDFInfo
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- CN203585378U CN203585378U CN201320472061.9U CN201320472061U CN203585378U CN 203585378 U CN203585378 U CN 203585378U CN 201320472061 U CN201320472061 U CN 201320472061U CN 203585378 U CN203585378 U CN 203585378U
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Abstract
The utility model discloses an self-cleaning gate valve for a coal chemical industry. The self-cleaning gate valve comprises a valve body, a valve rod, a valve cover on the valve body and an electric rack on the upper end of the valve cover via in a threaded connection way, wherein a connecting part between the valve cover and the electric rack is provided with fillings fastened via a filling press cover. The self-cleaning gate valve is characterized in that the lower end of a valve rod in the valve body is provided with a valve plate; two sides of the valve plate are respectively provided with an inlet pipeline and an outlet pipeline; both the inlet and the outlet pipelines are in a tapered pipe structured with a reducing diameter; the inlet pipeline comprises an inlet port and an outlet port; a self-cleaning structure is mounted on the outlet port; and a seal surface coating is formed by way of heated via a medium frequency induction heating technology and thermal spraying of nickel base alloy. The self-cleaning gate valve structure improves particle fluid conveying capacity of a flat gate valve; soft and hard dual seal is achieved via first compression by a soft seal ring and then a contact between a main valve seat and a valve plate and zero leakage is guaranteed; and the seal surface coating is formed by way of heated via the medium frequency induction heating technology and thermal spraying of the nickel base alloy.
Description
Technical field
The utility model relates to a kind of gate valve, is particularly applied to the self-cleaning type gate valve of Coal Chemical Industry.
Background technique
The operating modes of Coal Chemical Industry system in medium (cinder) high hardness, high pressure and high-temperature such as coal liquefaction, coal for oil and gasification, the function such as that valve should have is wear-resisting, resistance to erosion, good antiscale property, scab proof and fast shut-off.Valve aperture large (being generally DN300～DN350), open and close frequent and speed fast (30min moves once, 5～10s/ time), require valve seal performance good, reliability is high.At present, main this system of application is mainly wear resistance ball valve at present.
Wear resistance ball valve existing problems: Coal Chemical Industry and coal liquefaction industry, comprise 58%～67% coal dust solid in its WATER AS FLOW MEDIUM coal slurry.In Heisui River system and mortar system, contain the ultrahard solid particles such as a large amount of slag slurries, and it is on-the-spot owing to not possessing scarfing cinder condition, and ball valve itself does not possess automatic slag removal function yet, along with the increase impurity of time deposits gradually in valve cavity, obstruction or fouling, cause valve can not switch etc. fault.
Model utility content
The purpose of this utility model is to provide a kind of good airproof performance, preventing deposit in order to solve above-mentioned the deficiencies in the prior art, is applied to the self-cleaning type gate valve of Coal Chemical Industry.
To achieve these goals, the self-cleaning type gate valve that is applied to Coal Chemical Industry that the utility model is designed, comprise valve body, valve rod, be arranged on the valve gap on valve body and be threaded connection and be arranged on valve gap upper end electric bracket, valve rod one end is placed in valve body chamber, the other end is placed in electric bracket, valve gap and electric bracket joint are provided with by the fixing filler of Gland, it is characterized in that: the valve rod lower end being placed in valve body is provided with valve plate, the both sides of valve plate are inlet pipeline and outlet conduit, described enters, outlet conduit is different diameter cone tubular construction, described inlet pipeline comprises entrance point and outlet end, outlet end is provided with self-cleaning type structure, described self-cleaning type structure is by main valve seat, auxiliary-seat and spring form, on main valve seat and valve plate surface of contact, establish row soft seal ring, on main valve seat and auxiliary-seat, be respectively equipped with the first groove, the second groove, described spring one end is positioned at the first groove, the other end is placed in the second groove, described main valve seat, auxiliary-seat is close to respectively valve plate by spring, valve interior wall, described valve plate, main valve seat and auxiliary-seat flow passage set up row sealing surface coating separately, sealing surface coating need be used nickel-base alloy thermal spraying to form through medium-frequency induction heating technology then.
Preferably, described soft seal ring is PTFE ring.
Preferably, the inlet/outlet pipeline overcurrent of described body cavity is partly equipped with anti-wearing liner.
Preferably, to be the different diameter cone tubular construction diameter that refers to entrance point reduce to the diameter of outlet end described inlet pipeline successively.
Preferably, described outlet conduit is that different diameter cone tubular construction refers to that diameter that outlet conduit is positioned at valve plate end to the diameter in its outlet port reduces successively.
Preferably, the diameter that described outlet conduit is positioned at valve plate end is greater than the diameter of the outlet end of inlet pipeline.
Preferably, the thickness of described sealing surface coating is 0.5mm～1.0mm.
Preferably, the sealing surface coating outer surface of described valve plate, main valve seat and auxiliary-seat adopts surface grinding machine to grind.
Preferably, described anti-wearing liner and auxiliary-seat adjacent are provided with filter screen.
The self-cleaning type gate valve that is applied to Coal Chemical Industry that the utility model obtains, valve self-cleaning type structure, improved the ability that plate valve is carried granule fluid, adopt single slab design, greatly shorten gate-width distance, be convenient to medium and by middle road, enter outlet conduit fast, use soft seal ring first to compress and then make main valve seat contact valve plate realize soft or hard double seal, guarantee zero leakage, sealing surface coating need be used nickel-base alloy thermal spraying to form through medium-frequency induction heating technology then, can valve plate body and nickel-base alloy metallurgy combination realize sealing surface sclerosis.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is that the part in Fig. 1 sends out figure large.
In figure: valve body 1, valve rod 2, valve gap 3, electric bracket 4, filler 5, Gland 6, valve plate 7, self-cleaning type structure 8, inlet pipeline 10, outlet conduit 11, anti-wearing liner 12, main valve seat 21, auxiliary-seat 22, spring 23, filter screen 24, soft seal ring 25, O RunddichtringO 26, entrance point 101, outlet end 102, valve plate end 103, outlet port 104.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment:
As Fig. 1, shown in Fig. 2, the self-cleaning type gate valve that is applied to Coal Chemical Industry that the utility model provides, comprise valve body 1, valve rod 2, be arranged on the valve gap 3 on valve body and be threaded connection and be arranged on valve gap upper end electric bracket 4, valve rod 2 one end are placed in valve body 1 chamber, the other end is arranged on electric bracket 4, valve gap 3 is provided with by the fixing filler 5 of Gland 6 with electric bracket 4 joints, the valve rod lower end being placed in valve body is provided with valve plate 7, the both sides of valve plate 7 are inlet pipeline 10 and outlet conduit 11, described enters, outlet conduit 10, 11 is different diameter cone tubular construction, described inlet pipeline 10 comprises entrance point 101 and outlet end 102, the diameter that described inlet pipeline 10 refers to entrance point 101 for different diameter cone tubular construction to the diameter of outlet end 102 reduces successively, described outlet conduit 11 reduces successively for different diameter cone tubular construction refers to diameter that outlet conduit 11 is positioned at valve plate end 103 to the diameter in its outlet port 104, the diameter that described outlet conduit is positioned at valve plate end 103 is greater than the diameter of the outlet end 102 of inlet pipeline, make under pressure medium gather to center, avoid medium to disperse and wash away sealing surface.Outlet end 102 is provided with self-cleaning type structure 8, described self-cleaning type structure 8 is by main valve seat 21, auxiliary-seat 22 and spring 23 form, main valve seat 21 is provided with soft seal ring 25 with valve plate 7 surface of contact, on main valve seat 21 and auxiliary-seat 22, be respectively equipped with the first groove, the second groove, conflict in the two ends of described spring 23 is placed in the first groove, in the second groove, described main valve seat 21, auxiliary-seat 22 is close to respectively valve plate 7 by spring 23, valve body 1 inwall, described anti-wearing liner and auxiliary-seat adjacent are provided with filter screen 24, leading, in auxiliary-seat and valve body junction, O RunddichtringO 26 is installed, described valve plate 7, main valve seat 21 and auxiliary-seat 22 flow passages are arranged with sealing surface coating, sealing surface coating need be used nickel-base alloy thermal spraying to form through medium-frequency induction heating technology then, the thickness of described sealing surface coating is 0.5mm～1.0mm.。
Nickel-base alloy thermal spraying is a kind of sealing surface hardening method, and nickel-base alloy is wear-resisting, corrosion-resistant, heatproof etc., its high comprehensive performance, and according to practice, nickel-base alloy is applicable to the various working media such as buck, Heisui River, coal slurry, cinder.
Nickel-base alloy is a kind of self-dissolving alloy, main component comprises nickel, chromium, boron, silicon, wherein nickel is main component, also be the tackiness agent of high-abrasive material and body material, according to the difference of formulated component, can obtain different hardness, the design's valve plate, major and minor valve seat generally adopt the hardness of HRC55～64.By the high-temperature heating to body material and nickel-bass alloy material, can make matrix and sealing surface high-abrasive material reach metallurgy combination, therefore, nickel-base alloy thermal spraying has the advantages that adhesive strength is high.Thermal spraying for nickel-base alloy, spraying coating process has a great impact for the combination force of matrix and nickel-bass alloy material, the control of valve plate and nickel-bass alloy material heating-up temperature is extremely important, temperature is too low, valve plate 7, major and minor valve seat 21,22 body materials and nickel-bass alloy material can not really be realized metallurgy combination, easily cause coming off of cladding material.And excess Temperature, can cause the fusing of nickel-bass alloy material to be run off, therefore, want accurately to control uniformly valve plate 7, major and minor valve seat 21,22 heating-up temperature difficulty is very large, and this is the Major Difficulties of nickel-base alloy thermal spraying, for this reason, we have taked the technology of Frequency Induction Heating, can solve said temperature problem.
Described described soft seal ring 25 is PTFE ring, PTFE claims again teflon, when valve is applied to pressure medium, pressure-acting, in valve plate suction side, forces valve plate to shift to the PTFE ring on outlet valve seat, has just formed soft or hard double seal, first be that PTFE material is removed the foreign matter on flashboard automatically to metal sealing, having self-cleaning function, is then metal to metal seal, guarantees to guarantee for a long time zero leakage.
The inlet/outlet pipeline overcurrent of described body cavity is partly equipped with anti-wearing liner 12, increases the abrasion-resistance of gate valve.
In order better to improve sealability, the sealing surface coating outer surface of described valve plate 7, main valve seat 21 and auxiliary-seat 22 adopts surface grinding machine to grind.
On described valve plate 7, be to adopt single slab design, greatly shorten gate-width distance, be convenient to medium and by middle road, enter outlet conduit fast, avoid medium to enter lumen and wash away valve body, protection against erosion; Because valve plate is very thin, outlet valve plate surface temperature and inlet face are more or less the same, and being difficult for crystallization can crystallization-preventive; Outlet has slag exhausting mouth design, is convenient to deslagging preventing deposit.
Claims (10)
1. a self-cleaning type gate valve that is applied to Coal Chemical Industry, comprise valve body, valve rod, be arranged on the valve gap on valve body and be threaded connection and be arranged on valve gap upper end electric bracket, valve rod one end is placed in valve body chamber, the other end is placed in electric bracket, valve gap and electric bracket joint are provided with by the fixing filler of Gland, it is characterized in that: the valve rod lower end being placed in valve body is provided with valve plate, the both sides of valve plate are inlet pipeline and outlet conduit, described enters, going out pipeline is different diameter cone tubular construction, described inlet pipeline comprises entrance point and outlet end, outlet end is provided with self-cleaning type structure, described self-cleaning type structure is by main valve seat, auxiliary-seat and spring form, main valve seat and valve plate surface of contact are provided with soft seal ring, on main valve seat and auxiliary-seat, be respectively equipped with the first groove, the second groove, described spring one end is positioned at the first groove, the other end is placed in the second groove, described main valve seat, auxiliary-seat is close to respectively valve plate by spring, valve interior wall, described valve plate, main valve seat and auxiliary-seat flow passage are arranged with sealing surface coating, sealing surface coating need be used nickel-base alloy thermal spraying to form through medium-frequency induction heating technology then.
2. the self-cleaning type gate valve that is applied to Coal Chemical Industry according to claim 1, is characterized in that: described soft seal ring is PTFE ring.
3. the self-cleaning type gate valve that is applied to Coal Chemical Industry according to claim 1, is characterized in that: the inlet/outlet pipeline overcurrent of described body cavity is partly equipped with anti-wearing liner.
4. the self-cleaning type gate valve that is applied to Coal Chemical Industry according to claim 1, is characterized in that: to be the different diameter cone tubular construction diameter that refers to entrance point reduce to the diameter of outlet end described inlet pipeline successively.
5. the self-cleaning type gate valve that is applied to Coal Chemical Industry according to claim 1, is characterized in that: described outlet conduit is that different diameter cone tubular construction refers to that diameter that outlet conduit is positioned at valve plate end to the diameter in its outlet port reduces successively.
6. according to the self-cleaning type gate valve that is applied to Coal Chemical Industry described in claim 4 or 5, it is characterized in that: the diameter that described outlet conduit is positioned at valve plate end is greater than the diameter of the outlet end of inlet pipeline.
7. the self-cleaning type gate valve that is applied to Coal Chemical Industry according to claim 1, is characterized in that: the thickness of described sealing surface coating is 0.5mm～1.0mm.
8. the self-cleaning type gate valve that is applied to Coal Chemical Industry according to claim 1, is characterized in that: the sealing surface coating outer surface of described valve plate, main valve seat and auxiliary-seat adopts surface grinding machine to grind.
9. the self-cleaning type gate valve that is applied to Coal Chemical Industry according to claim 3, is characterized in that: described anti-wearing liner and auxiliary-seat adjacent are provided with filter screen.
10. the self-cleaning type gate valve that is applied to Coal Chemical Industry according to claim 6, is characterized in that: the sealing surface coating outer surface of described valve plate, main valve seat and auxiliary-seat adopts surface grinding machine to grind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320472061.9U CN203585378U (en) | 2013-07-24 | 2013-07-24 | Self-cleaning gate valve for coal chemical industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320472061.9U CN203585378U (en) | 2013-07-24 | 2013-07-24 | Self-cleaning gate valve for coal chemical industry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203585378U true CN203585378U (en) | 2014-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320472061.9U Expired - Fee Related CN203585378U (en) | 2013-07-24 | 2013-07-24 | Self-cleaning gate valve for coal chemical industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203585378U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438232A (en) * | 2013-07-24 | 2013-12-11 | 上海亚核阀业成套有限公司 | Self-cleaning gate valve applied to coal chemical industry |
| CN105132850A (en) * | 2015-08-10 | 2015-12-09 | 天津百利展发集团有限公司 | Nickel-based powder spray-welding process for large gate |
-
2013
- 2013-07-24 CN CN201320472061.9U patent/CN203585378U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438232A (en) * | 2013-07-24 | 2013-12-11 | 上海亚核阀业成套有限公司 | Self-cleaning gate valve applied to coal chemical industry |
| CN105132850A (en) * | 2015-08-10 | 2015-12-09 | 天津百利展发集团有限公司 | Nickel-based powder spray-welding process for large gate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20210724 |