High-reliability slide valve

Abstract

The high-reliability slide valve comprises a valve body, an integrated lining layer and a throttling cylinder, the integrated lining layer is located on the inner side face of the valve body, the integrated lining layer is of an up-down integrated structure, the top end of the integrated lining layer extends to the top of the valve body, and the bottom end of the integrated lining layer extends to the bottom of the valve body; the integrated lining layer uniformly expands at all positions during high-temperature expansion, the integrated lining layer comprises a heat insulation lining and a wear-resistant lining, the heat insulation lining is attached to the inner wall of the valve body and forms a preset thickness, the wear-resistant lining is attached to the heat insulation lining, and the wear-resistant lining is attached to the wear-resistant lining. The wear-resistant lining is located on the face, away from the face attached to the inner wall of the valve body, of the heat insulation lining, the throttling cylinder is arranged at the top in the valve body, and an expansion gap is formed between the integrated lining layer and the outer wall of the throttling cylinder. The problem that in the prior art, a high-temperature sliding valve is prone to being broken during high-temperature expansion, and consequently the structural reliability is poor is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of slide valves, and particularly to a highly reliable slide valve. Background Art

[0002] The maximum design temperature of a high-temperature slide valve can reach 780°C or 900°C, and the maximum operating temperature can reach 650°C and 780°C. Generally, the operating temperature of the outer wall of the valve body is 150°C and 250°C, and the design temperature of the outer wall of the valve body is 350°C. The working medium inside the valve body is generally a catalyst flowing at high speed, or flue gas containing catalyst particles.

[0003] The lining structure of existing high-temperature slide valves generally adopts two layers, upper and lower. Among them, the cylinder part of the valve body in the upper layer is a single-layer heat-insulating lining (generally a castable using large-particle expanded perlite as the aggregate), and a lining guard plate is arranged between the upper layer and the lower layer to separate the two layers. Due to the fact that the area where the heat-insulating lining in the upper layer is located is a closed space, the heat-insulating lining cannot expand freely after the temperature rises, and it is very easy to break and expand downward, resulting in the bulging or cracking of the lining guard plate, and then squeezing the lining structure in the lower part of the valve body to make it break or fall off, so that the entire lining structure is damaged.

[0004] In addition, the lining structure in the lower layer generally uses column-shaped heat-insulating nails for anchoring connection to ensure the reliability of the lining during use. However, the heat-insulating lining only relies on the column-shaped heat-insulating nails to play an anchoring and strengthening role. Each column-shaped heat-insulating nail is not related to each other and has a large spacing. Such a structural design makes the heat-insulating lining actually become a whole. Once problems such as falling off occur, it is very easy to spread to the whole. The anchoring effect of the column-shaped heat-insulating nails is very poor, and it is very easy to break, bulge, and fall off during high-temperature expansion.

[0005] The above problems cause the temperature of the outer surface of the valve body to exceed the designed operating temperature after the lining falls off. When only a small area of the lining falls off, the steam purging method can be used to cool down and repair and supplement the lining. When a large area of the lining falls off, only the device can be shut down for treatment, and shutting down a large-scale device for treatment will cause relatively large losses. Summary of the Invention

[0006] The main purpose of the present invention is to provide a highly reliable slide valve to solve the problem that the high-temperature slide valve in the prior art is easy to break during high-temperature expansion, resulting in poor structural reliability.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A highly reliable slide valve of the present invention includes a valve body, an integral lining layer, and a throttle barrel. The integral lining layer is located on the inner side surface of the valve body. The integral lining layer is of an up-and-down integral structure. The top end of the integral lining layer extends to the top of the valve body, and the bottom end extends to the bottom of the valve body. When the integral lining layer expands at high temperature, it expands uniformly at each position. The integral lining layer includes a heat-insulating lining and a wear-resistant lining. The heat-insulating lining is attached to the inner wall of the valve body and has a predetermined thickness. The wear-resistant lining is attached to the heat-insulating lining, and the wear-resistant lining is located on the side of the heat-insulating lining away from the inner wall of the valve body that it is attached to. The throttle barrel is arranged at the top inside of the valve body, and an expansion gap is formed between the integral lining layer and the outer wall of the throttle barrel.

[0009] Further, it further includes a plurality of anchor bolts and wires. The anchor bolts are penetrated through the integral lining layer, and the wires are wound around at least part of the anchor bolts to form a grid structure, so that the entire integral lining layer forms a relatively independent but interconnected structural mode.

[0010] Further, the wire has an extension section. One end of the extension section is located at the position of one of the anchor bolts, and the other end of the extension section has a fixing structure and is connected to another anchor bolt through the fixing structure.

[0011] Further, there are a plurality of the extension sections, and at least part of the anchor bolts are provided with the extension sections.

[0012] Further, at least a part of the anchor bolts are arranged in a first direction, at least another part of the anchor bolts are arranged in a second direction perpendicular to the first direction, and the anchor bolts arranged in the second direction are staggered from each other. Each of the anchor bolts is wound with the wire to form the grid structure including a plurality of triangular structures.

[0013] Further, the top side of the throttle barrel is connected to the inner wall of the top of the valve body, and the top end of the integral lining layer is located below the top end of the outer side surface of the throttle barrel.

[0014] Further, the throttle barrel is conical, and the top end of the integral lining layer is provided with an inclined surface that cooperates with the outer conical surface of the throttle barrel. An expansion gap is provided between the inclined surface of the integral lining layer and the outer conical surface of the throttle barrel.

[0015] Further, the thickness of the wear-resistant lining is less than the thickness of the heat-insulating lining.

[0016] Further, the heat-insulating lining is made of a castable with large particle expanded perlite as the aggregate, and the wear-resistant lining is made of a high-strength refractory castable with fused corundum as the aggregate.

[0017] Further, the inner side surface of the valve body has an uneven non-planar structure, and the integral lining layer is attached to the non-planar structure.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0019] The highly reliable slide valve of the present invention extends the lining layer up and down to the top and bottom of the valve body, so that the lining layer no longer adopts the traditional up-and-down layered arrangement, but adopts a unified up-and-down structural form. With this arrangement, when the lining layer expands at high temperature, the lining layer expands uniformly at each position, thereby avoiding the situation of mutual extrusion damage caused by inconsistent partition expansion and improving the reliability of the overall structure of the slide valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the highly reliable slide valve of the present invention;

[0022] Figure 2 is a schematic structural diagram of the anchor and wire in the highly reliable slide valve of the present invention.

[0023] Description of the reference numerals: 10, valve body; 20, integral lining layer; 21, heat-insulating lining; 22, wear-resistant lining; 30, throttle barrel; 40, expansion gap; 50, anchor;60, wire; 61, extension section; 62, fixing structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the drawings.

[0028] As Figure 1 、 Figure 2 shown, the high-reliability slide valve of this embodiment includes a valve body 10 and an integral lining layer 20. The integral lining layer 20 is located on the inner side of the valve body 10 and extends up and down to the top and bottom of the valve body 10. The integral lining layer 20 is a vertically integral structure.

[0029] In this embodiment, by extending the integral lining layer 20 up and down to the top and bottom of the valve body 10, the lining layer no longer adopts the traditional up-and-down layered setting method, but adopts a vertically unified structural form. In this way, when the integral lining layer 20 expands at high temperature, the integral lining layer 20 expands uniformly at each position, thereby avoiding the situation of mutual extrusion damage caused by inconsistent partition expansion and improving the reliability of the overall structure of the slide valve.

[0030] It should be noted that the so-called vertically integral structure in this embodiment means that the up-and-down structure of the integral lining layer 20 is the same and there is no up-and-down layering.

[0031] The high-reliability slide valve of this embodiment is more accurately a high-temperature slide valve. In this embodiment, the integral lining layer 20 includes a heat-insulating lining 21 and a wear-resistant lining 22. Among them, the heat-insulating lining 21 is attached to the inner wall of the valve body 10 and has a predetermined thickness. The wear-resistant lining 22 is attached to the heat-insulating lining 21, and the wear-resistant lining 22 is located on the side of the heat-insulating lining 21 away from the inner wall of the valve body 10 in contact therewith. The thickness of the wear-resistant lining 22 is less than the thickness of the heat-insulating lining 21.

[0032] In this way, both the heat-insulating lining 21 and the wear-resistant lining 22 form an integral lining layer 20. The wear-resistant lining 22 can adopt a high-strength refractory castable with fused corundum as the aggregate, and the heat-insulating lining 21 can adopt a castable with large-particle expanded perlite as the aggregate. Since the integral lining layer 20 is not stratified up and down, the top of the heat-insulating lining 21 and the wear-resistant lining 22 extends to the top of the valve body 10, and the bottom extends to the bottom of the valve body 10, so that the integral lining layer 20 forms a unified structure form up and down. Of course, the specific structure of the integral lining layer 20 is not limited to the above-mentioned inner and outer two-layer structure form, and other structure forms can also be adopted according to needs.

[0033] In this embodiment, the high-reliability slide valve further includes a throttle barrel 30. The throttle barrel 30 is arranged in the valve body 10. The throttle barrel 30 is conical and is arranged at the top of the valve body 10. The throttle barrel 30 adopts a structure form with a large opening at the top and a small opening at the bottom. The outer side wall of the large top opening is connected to the inner side wall of the top of the valve body 10. In this way, the top of the integral lining layer 20, that is, the heat-insulating lining 21 and the wear-resistant lining 22, is located below the top of the outer side surface of the throttle barrel 30. At this time, an expansion gap 40 is formed between the integral lining layer 20 and the outer wall of the throttle barrel 30. In this way, whether it is the integral lining layer 20 or the throttle barrel 30, there is a certain space for radial expansion at high temperature, so as to prevent the throttle barrel 30 from radially squeezing and axially stretching and damaging the integral lining layer 20 under high temperature conditions, and further ensure the structural stability.

[0034] Since the throttle barrel 30 is conical and the outer side surface of the throttle barrel 30 is an inclined conical surface, the top of the integral lining layer 20 is set in the form of an inclined surface. This inclined surface is parallel to the outer conical surface of the throttle barrel 30, and the two cooperate with each other to avoid interference between the top of the integral lining layer 20 and the throttle barrel 30. Since there is already a certain distance between most of the inner wall surface of the integral lining layer 20 and the throttle barrel 30, and only the top side of the integral lining layer 20, that is, the top inclined surface, is the closest to the outer wall surface of the throttle barrel 30, the extrusion problem between the top side of the integral lining layer 20 and the throttle barrel 30 during expansion only needs to be considered. Based on this, in this embodiment, the expansion gap 40 is arranged between the inclined surface of the integral lining layer 20 and the outer conical surface of the throttle barrel 30. Among them, expansion gaps or a certain space can also be arranged between other positions of the integral lining layer 20 and the throttle barrel 30 according to needs, as long as the situation where the throttle barrel 30 and the integral lining layer 20 are squeezed against each other during high-temperature expansion can be avoided.

[0035] 0]]Such as Figure 2As shown in the figure, the high-reliability slide valve of this embodiment further includes a plurality of anchor members 50 and wire threads 60. The anchor members 50 are inserted through the integral lining layer 20 and are used to fixedly connect the heat-insulating lining 21 and the wear-resistant lining 22 together. The anchor members 50 can be components such as cylindrical thermal insulation nails according to needs.

[0036] Specifically, the wire threads 60 can be made of heat-resistant steel wires. The wire threads 60 are wound around at least part of the anchor members 50 and form a grid structure. In this way, the entire integral lining layer 20 will form a relatively independent but interconnected structural mode, which not only retains the integrity of the integral lining layer 20 but also avoids the problem that the falling off of some positions spreads to the whole, greatly improving the anchoring effect of the integral lining layer 20. Combined with the unified structural form of the integral lining layer 20 up and down, it avoids the serious consequence that the integral lining layer 20 falls off in a large area and causes the device to stop working.

[0037] Among all the anchor members 50 of this embodiment, at least a part of the anchor members 50 are arranged in a first direction, and at least another part of the anchor members 50 are arranged in a second direction perpendicular to the first direction, and the anchor members 50 arranged in the second direction are staggered from each other. Figure 2 Taking the figure shown as an example, the first direction is horizontal and the second direction is vertical. There are anchor members 50 arranged both horizontally and vertically. Among them, the adjacent two rows of anchor members 50 arranged horizontally are not vertically aligned but vertically staggered. In this way, the anchor members 50 are staggered from each other. Combined with the arrangement method in which the wire threads 60 are wound around each anchor member 50 in this embodiment, the wire threads 60 on the adjacent anchor members 50 are wound into triangles, thereby forming a grid structure including a plurality of triangular structures, achieving the effect of further enhancing the connection strength.

[0038] In this embodiment, the wire thread 60 has an extension section 61. One end of the extension section 61 is located at the position of an anchor member 50 and extends outward from the position of this anchor member 50. The other end of the extension section 61 has a fixing structure 62. The fixing structure 62 can be a hook or the like according to needs. The end is connected and fixed to another anchor member 50 by welding or the like through the fixing structure 62, so as to realize the fixing of the wire thread 60. There are a plurality of extension sections 61, and the specific number thereof can be set according to needs, and at least part of the anchor members 50 are provided with extension sections 61. In this embodiment, extension sections 61 are provided at each anchor member 50, so as to ensure the reliable fixing of the grid structure formed by the wire threads 60.

[0039] In this embodiment, the inner side surface of the valve body 10 is struck by sandblasting or shot peening to form an uneven shape on its surface, thereby forming an uneven structure. The inner wall of the heat insulation lining 21 of the integrated lining layer 20 is then adhered to this uneven structure. By using this method, the viscosity and friction force between the heat insulation lining 21 and the inner wall of the valve body 10 can be greatly improved, making the adhesion effect between the heat insulation lining 21 and the inner wall of the valve body 10 better, and thus effectively preventing the integrated lining layer 20 from falling off.

[0040] The highly reliable sliding valve of the present invention solves the problem in the prior art that the high-temperature sliding valve is prone to breakage during high-temperature expansion, resulting in poor structural reliability. By adopting a unified structure form for the integrated lining layer from top to bottom, the integrated lining layer expands uniformly at each position, thus avoiding the situation of mutual extrusion damage caused by inconsistent expansion in different zones and improving the reliability of the overall structure of the sliding valve. At the same time, the expansion gap can prevent the throttle barrel from causing radial extrusion and axial tensile damage to the integrated lining layer during expansion at high temperatures, further ensuring the stability of the structure. Among them, the anchor fittings and wires form a relatively independent but interconnected structural mode for the entire integrated lining layer, greatly improving the anchoring effect of the integrated lining layer and avoiding the serious consequence of the device shutdown caused by large-area shedding of the integrated lining layer.

[0041] The embodiments described above are only used to describe the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A highly reliable slide valve, characterized in that, It includes a valve body (10), an integral lining layer (20) and a throttle barrel (30). The integral lining layer (20) is located on the inner side of the valve body (10). The integral lining layer (20) is of an integral structure from top to bottom. The top end of the integral lining layer (20) extends to the top of the valve body (10), and the bottom end extends to the bottom of the valve body (10). When the integral lining layer (20) expands at high temperature, it expands uniformly at each position. The integral lining layer (20) includes a heat-insulating lining (21) and a wear-resistant lining (22). The heat-insulating lining (21) fits with the inner wall of the valve body (10) and has a predetermined thickness. The wear-resistant lining (22) fits with the heat-insulating lining (21), and the wear-resistant lining (22) is located on the side of the heat-insulating lining (21) away from the inner wall of the valve body (10) that it fits with. The throttle barrel (30) is arranged at the inner top of the valve body (10). An expansion gap (40) is formed between the integral lining layer (20) and the outer wall of the throttle barrel (30).

2. The highly reliable slide valve according to claim 1, wherein It further includes a plurality of anchor bolts (50) and wires (60). The anchor bolts (50) are penetrated through the integral lining layer (20). The wires (60) are wound around at least part of the anchor bolts (50) to form a grid structure, so that the entire integral lining layer (20) forms a relatively independent but interconnected structural mode.

3. The highly reliable slide valve according to claim 2, characterized in that, The wire (60) has an extension section (61). One end of the extension section (61) is located at the position of one anchor bolt (50). The other end of the extension section (61) has a fixing structure (62) and is connected to another anchor bolt (50) through the fixing structure (62).

4. The highly reliable slide valve according to claim 3, wherein There are a plurality of the extension sections (61), and at least part of the anchor bolts (50) are provided with the extension sections (61).

5. The highly reliable slide valve according to claim 2, characterized in that, At least a part of the anchor bolts (50) are arranged in a first direction, and at least another part of the anchor bolts (50) are arranged in a second direction perpendicular to the first direction. And the anchor bolts (50) arranged in the second direction are staggered from each other. Each anchor bolt (50) is wound with the wire (60) to form the grid structure including a plurality of triangular structures.

6. The highly reliable slide valve according to claim 1, characterized in that, The top side of the throttle barrel (30) is connected to the inner wall of the top of the valve body (10). The top end of the integral lining layer (20) is located below the top end of the outer side of the throttle barrel (30).

7. The highly reliable slide valve according to claim 1, characterized in that, The throttle barrel (30) is conical. The top end of the integral lining layer (20) is provided with an inclined surface that matches the outer conical surface of the throttle barrel (30). An expansion gap (40) is formed between the inclined surface of the integral lining layer (20) and the outer conical surface of the throttle barrel (30).

8. The highly reliable slide valve according to claim 1, characterized in that, The thickness of the wear-resistant lining (22) is less than the thickness of the heat-insulating lining (21).

9. The highly reliable slide valve according to claim 1, characterized in that, The heat-insulating lining (21) is made of a castable with large-particle expanded perlite as the aggregate, and the wear-resistant lining (22) is made of a high-strength refractory castable with fused corundum as the aggregate.

10. The highly reliable slide valve according to any one of claims 1-9, characterized in that, The inner side of the valve body (10) has an uneven non-planar structure, and the integral lining layer (20) is attached to the non-planar structure.

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