High-temperature-resistant and corrosion-resistant valve seat based on composite material

Abstract

The utility model discloses a composite material-based high-temperature-resistant corrosion-resistant valve seat, which relates to the technical field of valve seats, and comprises a valve seat, the right side of the valve seat is provided with a connecting pipe, an inserting pipe and a guide pipe through mounting flanges, the connecting pipe is provided with an inserting rod through a sliding block, and the inserting pipe is provided with an inserting hole matched with the inserting rod for use; the surface layer of the valve seat is a carbon fiber reinforced polyimide resin composite material layer, the middle layer of the valve seat is a polytetrafluoroethylene modified material layer, and the base layer of the valve seat is an A105 forged steel supporting ring. The surface layer of the valve seat is made of the carbon fiber reinforced polyimide resin composite material, the middle layer is the polytetrafluoroethylene modified material layer, the base layer is the A105 forged steel supporting ring, the valve seat can stably operate for a long time under the severe working conditions of high temperature and strong corrosion due to the multi-layer composite structure, the guide pipe can be quickly mounted and dismounted through the quick dismounting type structure, and the service life of the guide pipe is prolonged. Operation of workers is facilitated, and the connection quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of valve seat technology, specifically a high-temperature and corrosion-resistant valve seat based on composite materials. Background Technology

[0002] In industrial production, valves, as key control components in fluid transport systems, directly impact the safety and efficiency of the entire production process due to their stability and reliability. Especially under harsh conditions such as high temperatures and strong corrosion, the seat materials of ordinary valves often fail to meet the requirements, easily exhibiting insufficient high-temperature resistance and poor corrosion resistance. This leads to a significant reduction in valve lifespan, increasing equipment maintenance costs and downtime, and in severe cases, potentially even causing safety accidents.

[0003] Existing valve seat materials, such as some traditional metals, while possessing certain advantages in strength, are prone to creep and oxidation at high temperatures, leading to a decline in valve sealing performance. While some non-metallic materials offer some corrosion resistance, they soften and deform under high temperatures, compromising valve operation. Furthermore, existing valves have shortcomings in their connection to conduits, such as inconvenient connection methods and poor connection stability, causing considerable inconvenience for installation, disassembly, and maintenance. Moreover, during long-term valve use, the connection between the valve seat and conduits is prone to loosening and leakage, further affecting valve performance. Therefore, we propose a high-temperature and corrosion-resistant valve seat based on composite materials. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature and corrosion-resistant valve seat based on composite materials to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-temperature and corrosion-resistant valve seat based on composite materials includes a valve seat with a control handle rotatably mounted on it. The bottom end of the control handle is connected to a valve core. A connecting flange is provided at the left end of the valve seat. The valve seat is characterized by having a mounting flange at the right end, a connecting pipe mounted on the mounting flange via fixing bolts, a insertion tube inserted into the connecting pipe, and a guide tube at the right end of the insertion tube. The connecting pipe also has several uniformly arranged cavities inside, with a slider slidably mounted within each cavity. A insertion rod is provided at the bottom of the slider, and the insertion tube has an insertion hole for use with the insertion rod. A support rod is provided on the outer wall of the slider, penetrating the side wall of the connecting pipe and slidably connected to it. The valve seat surface layer is a carbon fiber reinforced polyimide resin composite material layer, the valve seat middle layer is a polytetrafluoroethylene modified material layer, and the valve seat base layer is an A105 forged steel support ring.

[0007] As a further embodiment of this utility model: the insert tube is further provided with a plurality of mounting cavities evenly arranged inside, a sliding plate is slidably arranged in the mounting cavity, a limit rod is provided on the side wall of the sliding plate, and a limit groove is provided on the insert rod to cooperate with the limit rod.

[0008] As a further improvement of this utility model: a first spring is sleeved on the outer side of the support rod, one end of the first spring is connected to the inner wall of the cavity, and the other end of the first spring is connected to the slider.

[0009] As a further improvement of this utility model: a telescopic rod is also provided inside the mounting cavity, and the end of the telescopic arm of the telescopic rod is connected to the slide plate.

[0010] As a further improvement of this utility model: a second spring is also sleeved on the outside of the telescopic rod, one end of the second spring is connected to the slide plate, and the other end of the second spring is connected to the inner wall of the mounting cavity.

[0011] As a further improvement of this utility model, a handle is provided at the outer end of the support rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The valve seat surface layer is made of carbon fiber reinforced polyimide resin composite material, the middle layer is a polytetrafluoroethylene modified material layer, and the base layer is an A105 forged steel support ring. The multi-layer composite structure enables the valve seat to operate stably for a long time under harsh working conditions of high temperature and strong corrosion. It effectively solves the problems of insufficient high temperature resistance and poor corrosion resistance of traditional valve seat materials, greatly extends the service life of the valve, reduces equipment maintenance costs and downtime, and improves the safety and efficiency of the production process.

[0014] 2. The connecting pipe and the insertion pipe adopt an insertion method. Through the coordinated action of components such as the slider, insertion rod, first spring, support rod, handle, and the internal sliding plate, limit rod, second spring, and telescopic rod of the insertion pipe, the conduit can be quickly installed and disassembled, which is convenient for operators, ensures connection quality, effectively avoids problems such as loosening and leakage at the connection, improves the valve's performance and reliability, and provides convenience for valve inspection and maintenance. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a bottom view of the structure of an embodiment of the present invention.

[0017] Figure 3 This is a side view of the internal structure of an embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the structure at point A in an embodiment of this utility model.

[0019] Figure label annotations: 1. Valve seat; 2. Control handle; 3. Connecting flange; 4. Mounting flange; 5. Connecting pipe; 6. Insertion pipe; 7. Fixing bolt; 8. Sliding block; 9. Insertion rod; 10. First spring; 11. Support rod; 12. Handle; 13. Slide plate; 14. Limit rod; 15. Telescopic rod; 16. Second spring. Detailed Implementation

[0020] The following embodiments will be described in detail with reference to the accompanying drawings. In the drawings and description, similar or identical parts are referred to by the same reference numerals. Furthermore, in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this utility model are merely illustrative and not intended to limit the scope of the utility model. Any obvious modifications or alterations made to this utility model do not depart from its spirit and scope.

[0021] Example

[0022] Please see Figures 1-4 In this embodiment of the invention, a high-temperature and corrosion-resistant valve seat based on composite materials includes a valve seat 1. A control handle 2 is rotatably mounted on the valve seat 1, and the bottom end of the control handle 2 is connected to the valve core. Under the action of the control handle 2, the valve can be opened and closed. A connecting flange 3 is provided at the left end of the valve seat 1. Under the action of the connecting flange 3, the valve can be positioned in a suitable operating position, thereby ensuring the efficiency of the valve. The surface layer of the valve seat 1 is made of carbon fiber reinforced polyimide resin (PI) composite material, with a carbon fiber volume fraction ≥30%, a long-term operating temperature of up to 350℃, and a coefficient of thermal expansion ≤5×10.-5 The valve seat 1 has a core layer of polytetrafluoroethylene (PTFE) modified material, filled with 20% nano-alumina particles and 5% graphene to improve wear resistance and reduce cold flow. The base layer is an A105 forged steel support ring with a surface coated with a high-velocity flaming (HVOF) tungsten carbide coating (thickness 0.3-0.5mm, porosity ≤0.5%) and a hardness ≥HRC72, thereby improving the high-temperature and corrosion resistance of the valve seat 1.

[0023] A mounting flange 4 is provided at the right end of the valve seat 1. A connecting pipe 5 is installed on the mounting flange 4 by fixing bolts 7. A plug pipe 6 is inserted into the connecting pipe 5. A conduit is provided at the right end of the plug pipe 6. With the help of the connecting pipe 5 and the plug pipe 6, the conduit can be quickly installed and disassembled, which facilitates the installation of the conduit by the staff. At the same time, with the help of the mounting flange 4 and fixing bolts 7, it is easy for the staff to disassemble the connecting pipe 5, so as to carry out maintenance work on the internal components of the valve shaft 1, thereby ensuring the efficiency of the valve.

[0024] The connecting tube 5 is also evenly provided with several cavities. A slider 8 is slidably arranged in the cavity. A rod 9 is provided at the bottom of the slider 8. The insertion tube 6 is provided with a insertion hole that cooperates with the rod 9. At this time, the connection quality between the insertion tube 6 and the connecting tube 5 is guaranteed by the action of the rod 9 and the insertion hole. A support rod 11 is provided on the outer wall of the slider 8. The support rod 11 passes through the side wall of the connecting tube 5 and is slidably connected to the connecting tube 5. At this time, the slider 8 can be moved by the support rod 11. A first spring 10 is sleeved on the outside of the support rod 11. One end of the first spring 10 is connected to the inner wall of the cavity, and the other end of the first spring 10 is connected to the slider 8. At this time, the connection quality between the rod 9 and the insertion hole is guaranteed by the action of the first spring 10, thereby ensuring the connection quality between the insertion tube 6 and the connecting tube 5. A handle 12 is provided at the outer end of the support rod 11. The support rod 11 can be moved by the handle 12.

[0025] The insertion tube 6 is also evenly provided with several installation cavities. A sliding plate 13 is slidably arranged in the installation cavity. A limiting rod 14 is provided on the side wall of the sliding plate 13. The insertion rod 9 is provided with a limiting groove that works with the limiting rod 14. Under the action of the limiting rod 14 and the limiting groove, the insertion rod 9 can be fixed. A telescopic rod 15 is also provided inside the installation cavity. The end of the telescopic arm of the telescopic rod 15 is connected to the sliding plate 13. A second spring 16 is also sleeved on the outside of the telescopic rod 15. One end of the second spring 16 is connected to the sliding plate 13, and the other end of the second spring 16 is connected to the inner wall of the installation cavity. Under the action of the second spring 16, the connection quality between the limiting rod 14 and the insertion rod 9 is ensured.

[0026] In actual use, when the valve is in normal operation, the carbon fiber reinforced polyimide resin (PI) composite material on the surface of the valve seat 1, the polytetrafluoroethylene (PTFE) modified material layer in the middle layer, and the A105 forged steel support ring in the base layer work together to give the valve seat excellent high temperature and corrosion resistance, ensuring stable operation of the valve under harsh conditions. When it is necessary to connect the conduit, the insertion pipe 6 is inserted into the connecting pipe 5. The insertion hole on the insertion pipe 6 is aligned with the insertion rod 9 at the bottom of the slider 8 inside the connecting pipe 5. Under the elastic force of the first spring 10, the slider 8 drives the insertion rod 9 to insert into the insertion hole, realizing the initial connection between the insertion pipe 6 and the connecting pipe 5. Simultaneously, the limiting groove on the insertion rod 9 aligns with the limiting rod 14 on the side wall of the sliding plate 13 inside the insertion tube 6. Under the elastic force of the second spring 16, the sliding plate 13 drives the limiting rod 14 to insert into the limiting groove, fixing the insertion rod 9 and further ensuring the connection quality between the insertion tube 6 and the connecting pipe 5. This allows the conduit to be installed quickly and stably. When it is necessary to disassemble the conduit or repair the internal components of the valve seat 1, the operator holds the handle 12 and pulls the support rod 11. The support rod 11 drives the slider 8 to move, overcoming the elastic force of the first spring 10, causing the insertion rod 9 to exit from the insertion hole. At the same time, due to the separation of the limiting rod 14 from the limiting groove, the sliding plate 13 returns to its original position under the action of the second spring 16. At this time, the insertion tube 6 can be easily pulled out from the connecting pipe 5, realizing the quick disassembly of the conduit. If it is necessary to disassemble the connecting pipe 5, simply loosen the fixing bolt 7. This facilitates the operation of the operator and improves the efficiency and maintainability of the valve.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-temperature and corrosion-resistant valve seat based on composite materials, comprising a valve seat (1), wherein a control handle (2) is rotatably disposed on the valve seat (1), the bottom end of the control handle (2) is connected to a valve core, and a connecting flange (3) is disposed at the left end of the valve seat (1), characterized in that, A mounting flange (4) is provided at the right end of the valve seat (1). A connecting pipe (5) is provided on the mounting flange (4) by fixing bolts (7). A plug pipe (6) is inserted into the connecting pipe (5). A conduit is provided at the right end of the plug pipe (6). Several cavities are evenly arranged inside the connecting pipe (5). A slider (8) is slidably arranged in the cavity. A plug rod (9) is provided at the bottom of the slider (8). A plug hole is provided on the plug pipe (6) to cooperate with the plug rod (9). A support rod (11) is provided on the outer wall of the slider (8). The support rod (11) penetrates the side wall of the connecting pipe (5) and is slidably connected to the connecting pipe (5). The surface layer of the valve seat (1) is a carbon fiber reinforced polyimide resin composite material layer, the middle layer of the valve seat (1) is a polytetrafluoroethylene modified material layer, and the base layer of the valve seat (1) is an A105 forged steel support ring.

2. The high-temperature and corrosion-resistant valve seat based on composite materials according to claim 1, characterized in that, The insertion tube (6) is also provided with several mounting cavities evenly arranged inside, and a sliding plate (13) is slidably arranged in the mounting cavity. A limit rod (14) is provided on the side wall of the sliding plate (13), and a limit groove is provided on the insertion rod (9) to cooperate with the limit rod (14).

3. The high-temperature and corrosion-resistant valve seat based on composite materials according to claim 1, characterized in that, The support rod (11) is fitted with a first spring (10) on its outer side. One end of the first spring (10) is connected to the inner wall of the cavity, and the other end of the first spring (10) is connected to the slider (8).

4. The high-temperature and corrosion-resistant valve seat based on composite materials according to claim 2, characterized in that, The mounting cavity is also equipped with a telescopic rod (15), and the end of the telescopic arm of the telescopic rod (15) is connected to the slide plate (13).

5. The high-temperature and corrosion-resistant valve seat based on composite materials according to claim 4, characterized in that, A second spring (16) is also sleeved on the outside of the telescopic rod (15). One end of the second spring (16) is connected to the slide plate (13), and the other end of the second spring (16) is connected to the inner wall of the mounting cavity.

6. The high-temperature and corrosion-resistant valve seat based on composite materials according to claim 3, characterized in that, A handle (12) is provided at the outer end of the support rod (11).

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