High-temperature-resistant flash valve exhaust nozzle structure

Abstract

The utility model discloses a high-temperature-resistant flash valve exhaust nozzle structure which comprises a pipe body and an energy reduction structure. The energy reduction structure comprises at least two stages of ceramic energy reduction units which are connected in series, and the ceramic energy reduction units are connected in the pipe body; the ceramic energy reduction unit comprises a first-stage energy reduction assembly and a second-stage energy reduction assembly; the first-stage energy reduction assembly comprises a first ceramic spray pipe and a first liner pipe; the first lining pipe sleeves the outer side of the first ceramic spray pipe; the first liner tube is arranged in the tube body; the second-stage energy reduction assembly comprises a second ceramic spray pipe and a second liner pipe; the second lining pipe sleeves the outer side of the second ceramic spray pipe; the second liner tube is arranged in the tube body; the end of the first ceramic spray pipe abuts against the end of the second ceramic spray pipe. And a medium flows out of the pipe body after sequentially passing through the first-stage energy reduction assembly and the second-stage energy reduction assembly from the inlet end of the pipe body. According to the multi-stage energy reduction device, the multi-stage energy reduction assemblies connected in series are adopted, medium pressure can be decomposed into stage-by-stage release, and therefore the fluid speed is effectively reduced, and dependence on a high-temperature adhesive is also avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal chemical industry, smelting and chemical industry, and particularly relates to a tail nozzle structure of a high-temperature-resistant flash valve. BACKGROUND

[0002] In the field of coal chemical industry, smelting and chemical industry and the like, fluid media usually have the characteristics of high pressure, high corrosion, high erosion and easy flash evaporation under extremely harsh conditions. In order to safely reduce the pressure and speed of high-pressure fluid and then discharge it into a flash tank and the like, a corrosion-resistant energy-reducing structure is usually arranged in the tail nozzle of the flash valve. Ceramic material becomes the first choice for manufacturing the energy-reducing assembly due to its excellent corrosion resistance and erosion resistance.

[0003] In the prior art, the common nozzle structure is difficult to cope with extremely high pressure difference, and single-stage energy reduction can cause the speed of fluid to increase sharply in a single link, thereby causing severe erosion and cavitation of the pipe fitting and greatly shortening the service life of the tail nozzle. At the same time, the excessive concentration of energy release can also easily cause more serious flash evaporation, thereby intensifying the damage to the downstream pipe section. Secondly, in the installation method of the ceramic inner part, the prior art usually directly bonds the ceramic inner part to the inner wall of the metal pipe body by using a high-temperature adhesive. The long-term tolerance temperature of the domestic high-performance high-temperature adhesive is generally not more than 240 DEG C, and the existing adhesive cannot meet the requirements of some high-temperature working conditions, such as 280 DEG C or even higher. Moreover, the adhesive is difficult to operate in the assembly process of the ceramic inner part, because the adhesive can be easily cured before the ceramic pipe reaches the designed position, thereby causing assembly failure and product scrap. In addition, once the bonding structure is cured, subsequent maintenance and replacement are extremely difficult.

[0004] Therefore, there is an urgent need in the art for a high-temperature-resistant flash valve tail nozzle structure. CONTENT OF THE INVENTION

[0005] The high-temperature-resistant flash valve tail nozzle structure provided by the embodiment of the present application solves the problem that the tail nozzle structure of the flash valve in the prior art is easily damaged by the flash evaporation of the fluid with high speed in the process of coping with high-pressure medium, thereby significantly shortening the service life. Moreover, the way of fixing the ceramic inner part by using the adhesive has the problems of low temperature resistance limit, easy assembly failure and difficult maintenance.

[0006] The utility model discloses an embodiment provides a kind of high-temperature-resistant flash valve tail nozzle structure, including pipe body and energy reduction structure;The energy reduction structure includes at least two stages of ceramic energy reduction unit in series, the ceramic energy reduction unit is connected in the pipe body;The ceramic energy reduction unit includes first stage energy reduction assembly and second stage energy reduction assembly;The first stage energy reduction assembly includes first ceramic nozzle and first lining pipe;The first lining pipe is sleeved on the outside of the first ceramic nozzle;The first lining pipe is arranged in the pipe body;The second stage energy reduction assembly includes second ceramic nozzle and second lining pipe;The second lining pipe is sleeved on the outside of the second ceramic nozzle;The second lining pipe is arranged in the pipe body;The end of the first ceramic nozzle and the end of the second ceramic nozzle abut;The medium is sequentially flowed to the outlet end of the pipe body by the inlet end of the pipe body via the first ceramic nozzle and the second ceramic nozzle.

[0007] In a possible implementation, the utility model also includes an inlet straight pipe section assembly; the inlet straight pipe section assembly includes a ceramic straight pipe section and a third lining pipe; the third lining pipe is sleeved on the outside of the ceramic straight pipe section; the third lining pipe is arranged in the pipe body; the ceramic straight pipe section abuts with the end of the first ceramic nozzle away from the second ceramic nozzle.

[0008] In a possible implementation, the pipe body includes an outlet pipe; the outlet pipe is connected to the outlet end of the pipe body; the second lining pipe is arranged in the outlet pipe.

[0009] In a possible implementation, the utility model also includes a large flange and a fixed flange; one end of the fixed flange is connected to the end of the pipe body away from the outlet pipe, and the other end of the fixed flange is connected to the large flange; the large flange is connected with a flash tank.

[0010] In a possible implementation, the pipe body is provided with a reinforcing rib outside.

[0011] In a possible implementation, the large flange is connected with a flash tank body.

[0012] In a possible implementation, the first lining pipe is provided with a first boss; the second lining pipe is provided with a second boss; the third lining pipe is provided with a third boss; the inside of the pipe body is provided with a groove; the first boss, the second boss and the third boss are matched with the corresponding groove respectively.

[0013] In a possible implementation, the inner diameter of the first ceramic nozzle gradually increases from the input end to the output end; the inner diameter of the second ceramic nozzle gradually increases from the input end to the output end.

[0014] One or more technical solutions provided by the present application have at least the following technical effects:

[0015] The utility model discloses an adopt a kind of high-temperature-resistant flash valve tail nozzle structure, including pipe body and energy reduction structure;Energy reduction structure includes at least two stages of ceramic energy reduction unit in series, and ceramic energy reduction unit is connected in pipe body;Medium is sequentially decelerated by the inlet end of pipe body via at least two stages of ceramic energy reduction unit and then flows to the outlet end of pipe body.Ceramic energy reduction unit includes first energy reduction assembly and second energy reduction assembly;First energy reduction assembly includes first ceramic nozzle and first lining pipe;First lining pipe is sleeved on the outside of first ceramic nozzle;First lining pipe is arranged in pipe body;Second energy reduction assembly includes second ceramic nozzle and second lining pipe;Second lining pipe is sleeved on the outside of second ceramic nozzle;Second lining pipe is arranged in pipe body;The end of first ceramic nozzle and the end of second ceramic nozzle abut;Medium is sequentially decelerated by the inlet end of pipe body via first ceramic nozzle and second ceramic nozzle and then flows to the outlet end of pipe body.The application adopts multistage energy reduction assembly in series, can decompose medium pressure into gradual release, effectively reduce fluid velocity, thereby reduce the scouring, cavitation and flash impact of ceramic inner part, prolong the service life of ceramic inner part;Through the positioning structure of boss and groove, in combination with the fastening mode of interference fit, thereby get rid of the dependence on high-temperature adhesive, make temperature resistance ability only depend on material itself, make tail nozzle applicable in high-temperature environment, and, through the cooperation of ceramic nozzle and lining pipe, thereby simplifying installation step, simplifying the replacement and maintenance of ceramic inner part. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be to the utility model embodiment description needed to use the drawing briefly introduced, obviously, the following description in the drawing is some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, according to these drawings, other drawings can also be obtained.

[0017] Figure 1 It is the schematic diagram of the high-temperature-resistant flash valve tail nozzle structure provided by the embodiment of the application;

[0018] Figure 2 It is the enlarged view of A of Figure 1

[0019] Figure 3 It is the top view of the first lining pipe provided by the embodiment of the application;

[0020] Figure 4 It is the B-B sectional view of Figure 3

[0021] ​​Icon: 1-tube body; 2-energy reduction structure; 21-ceramic energy reduction unit; 211-first stage energy reduction assembly; 2111-first ceramic nozzle; 2112-first liner pipe; 212-second stage energy reduction assembly; 2121-second ceramic nozzle; 2122-second liner pipe; 3-inlet straight pipe segment assembly; 31-ceramic straight pipe segment; 32-third liner pipe; 4-outlet pipe; 5-large flange; 6-fixing flange; 7-stiffener; 8-flash tank body; 9-first boss; 10-flash valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are the orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0024] The present application provides a high-temperature-resistant flash valve tail nozzle structure, as shown in Figures 1-4 The present application provides a high-temperature-resistant flash valve tail nozzle structure, as shown in

[0025] Exemplarily, the medium flows from the inlet end of the pipe body 1 to the outlet end of the pipe body 1 in sequence through the first-stage energy reduction assembly 211 and the second-stage energy reduction assembly 212. In actual application, the medium first passes through the first ceramic nozzle 2111 for first-time deceleration, and then passes through the second ceramic nozzle 2121 for second-time deceleration, so as to realize the technical effect of step-by-step pressure and speed reduction.

[0026] In the embodiment of the present application, as shown in Figures 1-4 the ceramic energy reduction unit 21 comprises the first-stage energy reduction assembly 211 and the second-stage energy reduction assembly 212; the first-stage energy reduction assembly 211 comprises the first ceramic nozzle 2111 and the first liner pipe 2112; the first liner pipe 2112 is sleeved outside the first ceramic nozzle 2111; the first liner pipe 2112 is arranged in the pipe body 1; the second-stage energy reduction assembly 212 comprises the second ceramic nozzle 2121 and the second liner pipe 2122; the second liner pipe 2122 is sleeved outside the second ceramic nozzle 2121; the second liner pipe 2122 is arranged in the pipe body 1; the end of the first ceramic nozzle 2111 abuts against the end of the second ceramic nozzle 2121; the medium flows from the inlet end of the pipe body 1 to the outlet end of the pipe body 1 in sequence through the first ceramic nozzle 2111 and the second ceramic nozzle 2121.

[0027] In the embodiment of the present application, as shown in Figures 1-4 the ceramic energy reduction unit 21 further comprises the inlet straight pipe section assembly 3; the inlet straight pipe section assembly 3 comprises the ceramic straight pipe section 31 and the third liner pipe 32; the third liner pipe 32 is sleeved outside the ceramic straight pipe section 31; the third liner pipe 32 is arranged in the pipe body 1; the ceramic straight pipe section 31 abuts against the end of the first ceramic nozzle 2111 away from the second ceramic nozzle 2121.

[0028] Exemplarily, the medium enters the ceramic straight pipe section 31 from the inlet end of the pipe body 1, and the ceramic straight pipe section 31 can play a role of preliminarily stabilizing the flow of the medium.

[0029] In the embodiment of the present application, as shown in Figures 1-4 the pipe body 1 comprises the outlet pipe 4; the outlet pipe 4 is connected to the outlet end of the pipe body 1; the second liner pipe 2122 is arranged in the outlet pipe 4.

[0030] Exemplarily, the second liner pipe 2122 is arranged in the outlet pipe 4, which can ensure stable installation of the second-stage energy reduction assembly 212.

[0031] In the embodiment of the present application, as shown in Figures 1-4 the ceramic energy reduction unit 21 further comprises the large flange 5 and the fixed flange 6; one end of the fixed flange 6 is connected to the end of the pipe body 1 away from the outlet pipe 4, and the other end of the fixed flange 6 is connected to the large flange 5; the large flange 5 is connected to the flash valve 10.

[0032] Exemplarily, one end of the fixed flange 6 is welded and fixed with the pipe body 1, and the other end of the fixed flange 6 is fixed with the large flange 5 through screws and nuts.

[0033] Exemplarily, the tail nozzle is connected with the flash valve 10 through the large flange 5, so that the mounting and sealing of the overall structure are realized.

[0034] In the embodiment of the present application, as shown in the figure, Figures 1-4 The pipe body 1 is externally provided with a reinforcing rib 7.

[0035] Exemplarily, the pipe body 1 is externally provided with a reinforcing rib 7, so as to enhance the structural strength and pressure resistance of the pipe body 1.

[0036] In the embodiment of the present application, as shown in the figure, Figures 1-4 The large flange 5 is connected with a flash tank body 8 near one end of the pipe body 1.

[0037] Exemplarily, the flash tank body 8 is fixedly connected with the large flange 5 through a bolt structure.

[0038] Exemplarily, the medium changes from liquid to gas after passing through the flash valve 10, and the function of the flash tank body 8 is to keep warm and pressure, so as to keep the medium in a gaseous state, preventing the gas from changing into liquid state due to pressure change.

[0039] In the embodiment of the present application, as shown in the figure, Figures 1-4 The first boss 9 is arranged on the first lining pipe 2112, the second boss is arranged on the second lining pipe 2122, the third boss is arranged on the third lining pipe 32, the recess is arranged in the pipe body 1, and the first boss 9, the second boss and the third boss are matched with the corresponding recesses respectively.

[0040] Exemplarily, the first boss 9, the second boss and the third boss are similar in structure.

[0041] Exemplarily, the precise positioning and fixing of the components are realized through the matching structure of the first boss 9 and the recess, so as to avoid the use of adhesive. During assembly, the first lining pipe 2112 is heated and expanded to be in interference fit with the first ceramic nozzle 2111 by using the principle of thermal expansion and cold contraction of metal, and after cooling, the first lining pipe 2112 and the first ceramic nozzle 2111 form a tight connection, and then the first lining pipe 2112 is assembled into the pipe body 1 through the matching structure of the first boss 9 and the corresponding recess.

[0042] In the embodiment of the present application, as shown in the figure, Figures 1-2 The inner diameter of the first ceramic nozzle 2111 gradually increases from the input end to the output end, and the inner diameter of the second ceramic nozzle 2121 gradually increases from the input end to the output end.

[0043] The high-temperature-resistant flash valve tail nozzle structure is assembled in the following process:

[0044] First, the first ceramic nozzle 2111 and the first liner pipe 2112 are interference fitted to form the first stage energy reduction assembly 211; the second ceramic nozzle 2121 and the second liner pipe 2122 are interference fitted to form the second stage energy reduction assembly 212; the ceramic straight pipe segment 31 and the third liner pipe 32 are interference fitted to form the inlet straight pipe segment assembly 3. Then, the second stage energy reduction assembly 212 is assembled with the outlet pipe 4, i.e. the second boss is matched with the groove in the outlet pipe 4; the first stage energy reduction assembly 211 is assembled with the pipe body 1, i.e. the first boss 9 is matched with the groove in the pipe body 1; the inlet straight pipe segment assembly 3 is assembled with the pipe body 1, i.e. the third boss is matched with the groove in the pipe body 1. Finally, the outlet pipe 4 and the pipe body 1 are welded to form the complete flash valve 10 tail nozzle structure.

[0045] Exemplarily, the structure of the present application is simple, improves the effect of medium speed reduction, through mechanical connection, makes the maintenance and assembly of the flash valve 10 tail nozzle more convenient, reduces the cost, and can expand the application scene of the flash valve 10.

[0046] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment mainly explains the difference from other embodiments.

[0047] The above examples are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A high temperature resistant flash valve tail nozzle structure, characterized in that, The pipe body (1) and the energy reduction structure (2); The energy reduction structure (2) comprises at least two stages of ceramic energy reduction units (21) connected in series, and the ceramic energy reduction units (21) are connected in the pipe body (1); The ceramic energy reduction unit (21) comprises a first-stage energy reduction assembly (211) and a second-stage energy reduction assembly (212); The first-stage energy reduction assembly (211) comprises a first ceramic nozzle (2111) and a first lining pipe (2112); The first lining pipe (2112) is sleeved outside the first ceramic nozzle (2111); The first lining pipe (2112) is arranged in the pipe body (1); The second-stage energy reduction assembly (212) comprises a second ceramic nozzle (2121) and a second lining pipe (2122); The second lining pipe (2122) is sleeved outside the second ceramic nozzle (2121); The second lining pipe (2122) is arranged in the pipe body (1); The end of the first ceramic nozzle (2111) abuts against the end of the second ceramic nozzle (2121); The medium flows from the inlet end of the pipe body (1) to the outlet end of the pipe body (1) through the first ceramic nozzle (2111) and the second ceramic nozzle (2121) in sequence.

2. The high temperature resistant flash valve tail nozzle structure of claim 1, wherein, Further comprising an inlet straight pipe section assembly (3); The inlet straight pipe section assembly (3) comprises a ceramic straight pipe section (31) and a third lining pipe (32); The third lining pipe (32) is sleeved outside the ceramic straight pipe section (31); The third lining pipe (32) is arranged in the pipe body (1); The ceramic straight pipe section (31) abuts against one end of the first ceramic nozzle (2111) away from the second ceramic nozzle (2121).

3. The high temperature resistant flash valve tail nozzle structure of claim 1, wherein, The pipe body (1) comprises an outlet pipe (4); The outlet pipe (4) is connected to the outlet end of the pipe body (1); The second lining pipe (2122) is arranged in the outlet pipe (4).

4. The high temperature resistant flash valve tail nozzle structure of claim 3, wherein, Further comprising a large flange (5) and a fixed flange (6); One end of the fixed flange (6) is connected to one end of the pipe body (1) away from the outlet pipe (4), and the other end of the fixed flange (6) is connected to the large flange (5); The large flange (5) is connected to a flash valve (10).

5. The high temperature resistant flash valve tail nozzle structure of claim 1, wherein, The pipe body (1) is provided with a reinforcing rib (7) on the outside.

6. The high temperature resistant flash valve tail nozzle structure of claim 4, wherein, The large flange (5) is connected with a flash tank body (8).

7. The high temperature resistant flash valve tail nozzle structure of claim 2, wherein, A first boss (9) is arranged on the first lining pipe (2112); A second boss is arranged on the second lining pipe (2122); A third boss is arranged on the third lining pipe (32); A groove is formed in the inside of the pipe body (1); The first boss (9), the second boss and the third boss are matched with the corresponding grooves, respectively.

8. The high temperature resistant flash valve exit cone structure of claim 1, wherein, The inner diameter of the first ceramic nozzle (2111) gradually increases from the input end to the output end; The inner diameter of the second ceramic nozzle (2121) gradually increases from the input end to the output end.

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