Three-valve-seat full-lining ceramic ball valve

Abstract

The utility model discloses a three-valve-seat full-lining ceramic ball valve which comprises a valve body, a valve rod, a ceramic ball body and ceramic valve seats. The upper valve seat is installed on the periphery of the valve rod, the lower end of the upper valve seat abuts against the surface of the ceramic ball body, the ceramic middle body sleeve is installed on the inner circular face of the valve body, and the ceramic valve seat is installed on the inner circular face of the ceramic middle body sleeve; an inlet flow channel and an outlet flow channel are arranged at the bottom of the valve body, and an upstream heating flow channel and a downstream heating flow channel which are communicated with the inlet flow channel are respectively arranged on the ceramic middle body sleeve. The two ceramic valve seats are respectively provided with a first heating flow channel for communicating the inlet flow channel with the upstream heating flow channel and a second heating flow channel for communicating the outlet flow channel with the downstream heating flow channel, and the upper valve seat is provided with a middle butt joint flow channel for communicating the upstream heating flow channel with the downstream heating flow channel. The check valve can prevent media from being crystallized to block the valve core, can also prevent the media from being in contact with the metal valve rod, and has the advantages of being anti-crystallization and anti-corrosion.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially a kind of three valve seat full ceramic ball valve. BACKGROUND

[0002] Currently, in chemical industry, ceramic ball valve is commonly used in corrosive and abrasive pipeline, but when medium contains sodium chloride, copper sulfate solution and the like, it is extremely easy to produce crystallization in pipeline and valve inner cavity, seriously hinder valve opening and closing, even lead to brittle ceramic ball body fragmentation damage.

[0003] In addition, although the ceramic material of ordinary ceramic ball valve lining can resist strong corrosion, but in the half-open state of ball body, medium will enter valve cavity and contact metal valve stem. Corrosion-resistant metals such as hastelloy, monel, titanium and other materials cannot withstand high temperature and high concentration of sulfuric acid, hydrochloric acid and the like.

[0004] Therefore, how to realize that the ceramic lining of valve can completely isolate the contact between medium and metal material, and also avoid the jam caused by crystallization during opening and closing, has become a technical problem to be solved in the industry. TECHNICAL SOLUTION

[0005] The utility model discloses a kind of three valve seat full ceramic ball valve, the utility model can prevent medium crystallization and jam valve core, also can isolate medium contact metal valve stem, with the advantages of anti-crystallization and anticorrosion.

[0006] To achieve the above object, the utility model provides the following technical scheme: three valve seat full ceramic ball valve, including valve body, valve stem and ceramic ball body, the upper end of the valve body is provided with shaft hole, the valve stem passes through the shaft hole and extends into the valve body inside and is linked with the ceramic ball body, the position corresponding to the both sides of the ceramic ball body in the valve body is respectively provided with one ceramic valve seat abutting tightly with the ceramic ball body;It also includes upper valve seat and ceramic middle body sleeve, the upper valve seat is installed in the outer periphery of valve stem in axial limit, and the lower end of the upper valve seat abuts tightly with the surface of ceramic ball body, so that the internal space of upper valve seat is separated from the inner cavity of valve body, the ceramic middle body sleeve is tightly installed on the inner circular surface of valve body, the upper end of the ceramic middle body sleeve is provided with inner hole for the upper valve seat to pass through, and the ceramic valve seat is tightly installed on the inner circular surface of ceramic middle body sleeve;The bottom of the valve body is provided with inlet flow channel and outlet flow channel for high-temperature medium to enter, the ceramic middle body sleeve is respectively provided with upstream temperature rising flow channel and downstream temperature rising flow channel communicated with inlet flow channel, two ceramic valve seats are respectively provided with first temperature rising flow channel for communicating inlet flow channel and upstream temperature rising flow channel and second temperature rising flow channel for communicating outlet flow channel and downstream temperature rising flow channel, and the upper valve seat is provided with middle part butt joint flow channel for communicating upstream temperature rising flow channel and downstream temperature rising flow channel.

[0007] By adopting the technical scheme, the upper valve seat is installed, the internal space of the upper valve seat is separated from the inner cavity of the valve body, the contact between the medium and the valve rod is isolated, the metal material has no chance to react with the strong corrosive fluid, and therefore the valve has excellent corrosion resistance. Meanwhile, during the use of the valve, the high-temperature medium flows through the inlet flow channel, the upstream temperature-increasing flow channel and the first temperature-increasing flow channel, the middle butt joint flow channel, the downstream temperature-increasing flow channel and the second temperature-increasing flow channel and the outlet flow channel in sequence, the valve body, the ceramic middle body sleeve, the ceramic valve seat and the upper valve seat are heated, and the temperature in the valve cavity is kept constant, so that crystallization and solidification caused by temperature reduction of the medium are prevented.

[0008] The utility model further sets up, the upstream temperature-increasing flow channel includes setting in the first annular groove of ceramic middle body sleeve periphery and first through -hole that is in the first annular groove and extends to the inner circular surface of ceramic middle body sleeve, the downstream temperature-increasing flow channel includes setting in the second annular groove of ceramic middle body sleeve periphery and second through -hole that is in the second annular groove and extends to the inner circular surface of ceramic middle body sleeve, the inlet flow channel and outlet flow channel are linked together with first annular groove and second annular groove respectively, the first temperature-increasing flow channel and the second temperature-increasing flow channel are annular groove shape and set up on the outer circular surface of two ceramic valve seats respectively, the middle butt joint flow channel is annular groove shape and sets up on the outer circular surface of upper valve seat, the inner hole of ceramic middle body sleeve still is equipped with first axial hole and second axial hole, the first axial hole will be located in the top first through -hole and middle butt joint flow channel link together, the second axial hole will be located in the top second through -hole and middle butt joint flow channel link together.

[0009] By adopting the technical scheme, the specific setting mode of the inlet flow channel, the upstream temperature-increasing flow channel, the first temperature-increasing flow channel, the middle butt joint flow channel, the downstream temperature-increasing flow channel, the second temperature-increasing flow channel and the outlet flow channel is convenient to process, and the medium is heated uniformly after being introduced.

[0010] The utility model further sets up, the outer circular surface of ceramic middle body sleeve corresponds the position of first annular groove two sides and installs a first sealing ring respectively, ceramic middle body sleeve corresponds the position of second annular groove two sides and installs a second sealing ring respectively, two ceramic valve seats correspond the position of first temperature-increasing flow channel two sides, second temperature-increasing flow channel two sides and install third sealing ring and fourth sealing ring respectively, the inner hole of ceramic middle body sleeve corresponds the position of first axial hole and second axial hole upper and lower and is equipped with fifth sealing ring respectively.

[0011] By adopting the technical scheme, the sealing property of cooperation between parts can be improved, and leakage of high-temperature medium is avoided.

[0012] The utility model further sets up, the valve body includes middle body and end valve cover connected in the both ends of middle body through fastener, ceramic middle body sleeve sets up on the inner circular surface of middle body.

[0013] By adopting the technical scheme, the split detachable structure of the valve body is convenient for dismounting internal components.

[0014] The utility model further provides, the outer circular surface of ceramic valve seat is equipped with the limit flange that extends outward, the outer circular surface of limit flang is closely combined with the inner circular surface of ceramic middle body cover, and the end of limit flange away from ceramic sphere is abutted with the inner end surface of end valve cover and constitutes limit cooperation.

[0015] By adopting the technical scheme, when installing the end valve cover, the end valve cover can directly press the ceramic valve seat on the spherical surface of the ceramic sphere, and the installation operation is very convenient.

[0016] The utility model further provides, the inner circular surface of end valve cover is equipped with ceramic flange cover with interference, and the ceramic flange cover is closely combined with corresponding ceramic valve seat, and sixth sealing ring is arranged between the ceramic flange cover and the ceramic valve seat.

[0017] By adopting the technical scheme, the inner wall of the end valve cover has corrosion resistance.

[0018] The utility model further provides, the outer circular surface of upper valve seat is equipped with limit flange edge for being abutted with the inner side of ceramic middle body cover and constitutes limit.

[0019] By adopting the technical scheme, the limit installation of the upper valve seat can be realized, and the structure is simple and reliable, and the dismounting is very convenient. DRAWINGS

[0020] Figure 1 It is the structure schematic diagram of the whole utility model;

[0021] Figure 2 It is the structure schematic diagram of middle body cover in the utility model.

[0022] In the drawing: 1, valve body;2, valve rod;3, ceramic sphere;4, shaft hole;5, upper valve seat;6, ceramic middle body cover;7, inner hole;8, inlet flow channel;9, outlet flow channel;10, upper stream temperature rise flow channel;11, downstream temperature rise flow channel;12, first temperature rise flow channel;13, second temperature rise flow channel;14, middle part butt joint flow channel;15, first annular groove;16, first through hole;17, second annular groove;18, second through hole;19, first axial hole;20, second axial hole;21, first sealing ring;22, second sealing ring;23, third sealing ring;24, fourth sealing ring;25, fifth sealing ring;26, middle body;27, end valve cover;28, limit flange;29, ceramic flange cover;30, sixth sealing ring;31, limit flange edge;32, ceramic valve seat. CONCRETE IMPLEMENTING METHOD

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example: As attached Figure 1 and attached Figure 2 The three-seat fully lined ceramic ball valve shown includes a valve body 1, a valve stem 2, and a ceramic ball 3. The valve body 1 has a shaft hole 4 at its upper end. The valve stem 2 extends through the shaft hole 4 into the valve body 1 and is linked to the ceramic ball 3 via a tenon joint. The outer surface of the valve stem 2 and the inner surface of the shaft hole 4 are sealed with packing. A ceramic valve seat 32 is installed inside the valve body 1 on each side of the ceramic ball 3, abutting against the ceramic ball 3. The ball valve also includes an upper valve seat 5 and a ceramic middle body 26 sleeve 6. The upper valve seat 5 is axially limited and installed on the outer periphery of the valve stem 2, with its lower end abutting against the surface of the ceramic ball 3, thus separating the internal space of the upper valve seat 5 from the inner cavity of the valve body 1. The ceramic middle body 26 sleeve 6 is tightly installed on the inner surface of the valve body 1, and its upper end has a [missing information - likely a design feature or feature]. The ceramic valve seat 32 is tightly installed on the inner circular surface of the ceramic body 26 sleeve 6 through the inner hole 7 of the upper valve seat 5; the bottom of the valve body 1 is provided with an inlet channel 8 and an outlet channel 9 for the entry of high temperature medium. The outer ends of the inlet channel 8 and the outlet channel 9 are connected to screw plugs. When not in use, the screw plugs are screwed on. When the valve is in use, the screw plugs are unscrewed to connect with the external high temperature medium pipeline. The ceramic body 26 sleeve 6 is provided with an upstream heating channel 10 and a downstream heating channel 11 that are connected to the inlet channel 8. The two ceramic valve seats 32 are provided with a first heating channel 12 for connecting the inlet channel 8 and the upstream heating channel 10 and a second heating channel 13 for connecting the outlet channel 9 and the downstream heating channel 11. The upper valve seat 5 is provided with a middle connecting channel 14 for connecting the upstream heating channel 10 and the downstream heating channel 11. An upper valve seat 5 is installed, its internal space separated from the inner cavity of the valve body 1, isolating the medium from contact with the valve stem 2. This prevents the metal material from reacting chemically with the highly corrosive fluid, thus giving the valve excellent corrosion resistance. Simultaneously, during valve operation, the high-temperature medium flows sequentially through the inlet channel 8, the upstream heating channel 10 and the first heating channel 12, the middle connecting channel 14, the downstream heating channel 11 and the second heating channel 13, and the outlet channel 9, heating the valve body 1, the ceramic inner body 26 set 6, the ceramic valve seat 32, and the upper valve seat 5. This maintains a constant temperature within the valve cavity, preventing crystallization and solidification caused by medium cooling.

[0025] As attached Figure 1 and attachedFigure 2 As shown in the drawings, the upstream temperature rising flow channel 10 includes a first annular groove 15 arranged on the outer periphery of the ceramic middle body 26 sleeve 6, and a first through hole 16 arranged in a circumferential array in the first annular groove 15 and extending to the inner circular surface of the ceramic middle body 26 sleeve 6, the downstream temperature rising flow channel 11 includes a second annular groove 17 arranged on the outer periphery of the ceramic middle body 26 sleeve 6, and a second through hole 18 arranged in a circumferential array in the second annular groove 17 and extending to the inner circular surface of the ceramic middle body 26 sleeve 6, the inlet flow channel 8 and the outlet flow channel 9 are respectively connected with the first annular groove 15 and the second annular groove 17; the first temperature rising flow channel 12 and the second temperature rising flow channel 13 are respectively arranged in the form of annular grooves on the outer circular surfaces of the two ceramic valve seats 32, and the middle butt joint flow channel 14 is arranged in the form of an annular groove on the outer circular surface of the upper valve seat 5, and the first axial hole 19 and the second axial hole 20 are further arranged in the inner hole 7 of the ceramic middle body 26 sleeve 6, the first axial hole 19 connects the first through hole 16 at the top with the middle butt joint flow channel 14, and the second axial hole 20 connects the second through hole 18 at the top with the middle butt joint flow channel 14. The specific arrangement mode of the inlet flow channel 8, the upstream temperature rising flow channel 10, the first temperature rising flow channel 12, the middle butt joint flow channel 14, the downstream temperature rising flow channel 11, the second temperature rising flow channel 13 and the outlet flow channel 9 not only facilitates processing, but also ensures uniform heating after the medium is introduced.

[0026] In order to facilitate processing, the first axial hole 19 and the second axial hole 20 can respectively pass through to both ends of the ceramic middle body 26 sleeve 6, threaded connection of the screw plug is arranged at the outer end of the first axial hole 19 and the second axial hole 20 to prevent leakage, and the both ends of the ceramic middle body 26 sleeve 6 are respectively provided with a clearance groove for complete embedding of the screw plug, so as to ensure the flatness of the both ends of the ceramic middle body 26 sleeve 6.

[0027] As shown in the drawings, the ceramic middle body 26 sleeve 6 is arranged on the inner circular surface of the middle body 26. Figure 1 As shown in the drawings, the ceramic middle body 26 sleeve 6 is arranged on the inner circular surface of the middle body 26.

[0028] As shown in the drawings, the ceramic middle body 26 sleeve 6 is arranged on the inner circular surface of the middle body 26. Figure 1 As shown in the drawings, the valve body 1 includes a middle body 26 and end valve covers 27 connected to both ends of the middle body 26 through fasteners (screws can be used), and the ceramic middle body 26 sleeve 6 is arranged on the inner circular surface of the middle body 26. The split detachable structure of the valve body 1 facilitates the disassembly and assembly of the internal parts.

[0029] As shown in the accompanying drawings Figure 1 The outer surface of the ceramic valve seat 32 is provided with an outwardly extending limiting flange 28, the outer surface of which is closely fitted with the inner surface of the ceramic middle body 26 sleeve 6, and the end of the limiting flange 28 away from the ceramic ball 3 is abutted with the inner end surface of the end valve cover 27 to form a limiting fit. When installing the end valve cover 27, the end valve cover 27 can directly press the ceramic valve seat 32 tightly on the spherical surface of the ceramic ball 3, and the installation operation is very convenient.

[0030] As shown in the accompanying drawings Figure 1 The inner surface of the end valve cover 27 is provided with a ceramic flange sleeve 29, which is closely fitted with the corresponding ceramic valve seat 32, and a sixth sealing ring 30 is arranged therebetween. This design can make the inner wall of the end valve cover 27 have corrosion resistance.

[0031] As shown in the accompanying drawings Figure 1 The outer surface of the upper valve seat 5 is provided with a limiting flange 31 for abutting against the inner side of the ceramic middle body 26 sleeve 6 to form a limiting fit. Specifically, a flat groove can be arranged on the inner side of the ceramic middle body 26 sleeve 6 for abutting and limiting the limiting flange 31. This design can realize the limiting installation of the upper valve seat 5, and has simple and reliable structure and very convenient disassembly and assembly.

Claims

1. A three-seat full ceramic lined ball valve, comprising a valve body (1), a valve stem (2) and a ceramic ball (3), an axle hole (4) is formed on the upper end of the valve body (1), the valve stem (2) penetrates the axle hole (4) and extends into the valve body (1) to be connected with the ceramic ball (3), and a ceramic valve seat (32) is installed on the valve body (1) at a position corresponding to each side of the ceramic ball (3) to abut against the ceramic ball (3); characterized in that: The application also comprises an upper valve seat (5) and a ceramic middle sleeve (6), the upper valve seat (5) is installed on the outer periphery of the valve stem (2) in axial position, and the lower end of the upper valve seat (5) abuts against the surface of the ceramic ball (3), so that the internal space of the upper valve seat (5) is separated from the inner cavity of the valve body (1), the ceramic middle sleeve (6) is tightly installed on the inner circular surface of the valve body (1), the upper end of the ceramic middle sleeve (6) is provided with an inner hole (7) for the upper valve seat (5) to pass through, and the ceramic valve seat (32) is tightly installed on the inner circular surface of the ceramic middle sleeve (6); the bottom of the valve body (1) is provided with an inlet flow channel (8) and an outlet flow channel (9) for the high-temperature medium to enter, the ceramic middle sleeve (6) is respectively provided with an upstream temperature rising flow channel (10) and a downstream temperature rising flow channel (11) which are communicated with the inlet flow channel (8), two ceramic valve seats (32) are respectively provided with a first temperature rising flow channel (12) for communicating the inlet flow channel (8) and the upstream temperature rising flow channel (10) and a second temperature rising flow channel (13) for communicating the outlet flow channel (9) and the downstream temperature rising flow channel (11), and the upper valve seat (5) is provided with a middle butt joint flow channel (14) for communicating the upstream temperature rising flow channel (10) and the downstream temperature rising flow channel (11).

2. The triple seat full-lined ceramic ball valve according to claim 1, characterized in that: The upstream temperature rising flow channel (10) comprises a first annular groove (15) arranged on the outer periphery of the ceramic middle sleeve (6) and a first through hole (16) which is arranged in the first annular groove (15) in a circumferential array and extends to the inner circular surface of the ceramic middle sleeve (6), the downstream temperature rising flow channel (11) comprises a second annular groove (17) arranged on the outer periphery of the ceramic middle sleeve (6) and a second through hole (18) which is arranged in the second annular groove (17) in a circumferential array and extends to the inner circular surface of the ceramic middle sleeve (6), and the inlet flow channel (8) and the outlet flow channel (9) are respectively communicated with the first annular groove (15) and the second annular groove (17); the first temperature rising flow channel (12) and the second temperature rising flow channel (13) are annular groove-shaped and arranged on the outer circular surfaces of the two ceramic valve seats (32), the middle butt joint flow channel (14) is annular groove-shaped and arranged on the outer circular surface of the upper valve seat (5), and the inner hole (7) of the ceramic middle sleeve (6) is further provided with a first axial hole (19) and a second axial hole (20), the first axial hole (19) communicates the first through hole (16) at the top with the middle butt joint flow channel (14), and the second axial hole (20) communicates the second through hole (18) at the top with the middle butt joint flow channel (14).

3. The triple seat full-lined ceramic ball valve according to claim 2, characterized in that: The outer circular surface of the ceramic middle sleeve (6) is provided with a first sealing ring (21) on both sides of the first annular groove (15), and the ceramic middle sleeve (6) is provided with a second sealing ring (22) on both sides of the second annular groove (17), and the two ceramic valve seats (32) are provided with a third sealing ring (23) and a fourth sealing ring (24) on both sides of the first temperature rising flow channel (12) and the second temperature rising flow channel (13) respectively, and the fifth sealing ring (25) is arranged on the upper and lower sides of the first axial hole (19) and the second axial hole (20) of the inner hole (7) of the ceramic middle sleeve (6).

4. The triple seat full-lined ceramic ball valve according to claim 1, characterized in that: The valve body (1) comprises a middle body (26) and end valve covers (27) connected to both ends of the middle body (26) by fasteners, and the ceramic middle sleeve (6) is arranged on the inner circular surface of the middle body (26).

5. The triple seat full-lined ceramic ball valve according to claim 4, characterized in that: The outer circular surface of the ceramic valve seat (32) is provided with an outwardly extending limiting flange (28), the outer circular surface of the limiting flange (28) is closely attached to the inner circular surface of the ceramic middle sleeve (6), and the end away from the ceramic ball (3) of the limiting flange (28) is in abutment with the inner end surface of the end valve cover (27) to form a limiting fit.

6. The triple seat full-lined ceramic ball valve according to claim 4, characterized in that: The inner circular surface of the end valve cover (27) is provided with a ceramic flange sleeve (29) fitted by interference, the ceramic flange sleeve (29) is closely attached to the corresponding ceramic valve seat (32), and a sixth sealing ring (30) is arranged therebetween.

7. The triple seat full-lined ceramic ball valve according to claim 1, characterized in that: The outer circular surface of the upper valve seat (5) is provided with a limiting flange (31) for abutting against the inner side of the ceramic middle sleeve (6) to form a limiting fit.

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