Rust-resistant high-temperature-resistant pressure reducing valve

Abstract

The utility model provides an anti-corrosion high-temperature-resistant pressure reducing valve which comprises a first shell, a second shell is fixedly installed at the bottom of the first shell through screws, a spring is fixedly installed at the center point of the bottom in the second shell, and a top plate is fixedly installed at the top of the spring. An elastic film is fixedly installed between the first shell and the second shell and located above the top plate. According to the anti-corrosion high-temperature-resistant pressure reducing valve, when the internal pressure of the first shell and the second shell is large, the elastic film deforms, the elastic film sinks towards the interior of the second shell and drives the top plate to move downwards, at the moment, the spring is compressed, and then the space between the first shell and the elastic film is enlarged; and particularly, when the valve is closed, the internal air pressure value is instantly increased due to sudden closing, the pressure reduction effect is achieved through the arrangement of the elastic film, the top plate and the spring, the valve is prevented from being damaged, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the field of pressure reducing valves, in particular to a corrosion-resistant and high-temperature-resistant pressure reducing valve. Background Art

[0002] The pressure reducing valve is a valve that reduces the inlet pressure to a required outlet pressure through regulation, and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. From the viewpoint of fluid mechanics, the pressure reducing valve is a throttling element with variable local resistance, that is, by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of pressure reduction. Then, by relying on the regulation of the control and regulation system, the fluctuation of the pressure behind the valve is balanced with the spring force, so that the pressure behind the valve is kept constant within a certain error range.

[0003] However, the pressure reducing valves currently available on the market have poor corrosion resistance and high temperature resistance during use. The gas is prone to contain water vapor, which adheres to the inside of the pressure reducing valve. In addition, different gases are transported at different temperatures, which can easily cause the pressure reducing valve to rust and become damaged.

[0004] Therefore, it is necessary to provide a rust-proof and high-temperature resistant pressure reducing valve to solve the above technical problems. Summary of the invention

[0005] The utility model provides a rust-proof and high-temperature resistant pressure reducing valve, which solves the problem that the pressure reducing valves in the existing market have poor corrosion resistance and high-temperature resistance during use, the gas easily contains water vapor, the water vapor adheres to the inside of the pressure reducing valve, and different gases have different temperatures when transported, which easily causes the pressure reducing valve to rust and be damaged.

[0006] The utility model provides a rust-proof and high-temperature resistant pressure reducing valve, comprising: a first shell, a second shell is fixedly installed on the bottom of the first shell by screws, a spring is fixedly installed at the center point of the bottom of the second shell, a top plate is fixedly installed on the top of the spring, an elastic membrane is fixedly installed between the first shell and the second shell and above the top plate, the first shell comprises a base layer, a zirconium oxide coating is arranged on one side of the outside of the base layer, a thin dense chromium coating is arranged on the outside of the zirconium oxide coating, an aluminum oxide ceramic coating is arranged on the outside of the thin dense chromium coating, and a DLC coating is arranged on the outside of the aluminum oxide ceramic coating.

[0007] Preferably, the DLC coating is a thin film coating composed of carbon atoms.

[0008] Preferably, an air inlet pipe is fixedly mounted on one side of the exterior of the first shell, and an air outlet pipe is fixedly mounted on the other side of the exterior of the first shell.

[0009] Preferably, a second air groove is opened at the center point inside the first shell, a first air groove is opened inside the first shell and outside the second air groove, and a one-way flow structure is formed between the air inlet pipe, the first air groove, the second air groove and the air outlet pipe.

[0010] Preferably, a screw is threadedly connected at the top center point of the first shell, a crank is connected to the keyway at the top center point of the screw, and a sealing gasket is rotatably installed at the bottom end of the screw and located inside the second air groove.

[0011] Preferably, a pressure gauge is provided outside the first shell.

[0012] Compared with the related art, the anti-corrosion and high temperature resistant pressure reducing valve provided by the utility model has the following beneficial effects:

[0013] When the internal pressure of the first shell and the second shell is relatively large, the elastic membrane is deformed, the elastic membrane is sunken into the interior of the second shell, and the elastic membrane drives the top plate to move downward. At this time, the spring is compressed, thereby expanding the space between the first shell and the elastic membrane, thereby playing a role in reducing pressure. In particular, when closing the valve, the sudden closing causes the internal air pressure value to increase instantly. Through the setting between the elastic membrane, the top plate and the spring, a decompression effect is played, thereby avoiding valve damage and improving practicality.

[0014] Zirconia coating is prepared by advanced technologies such as plasma spraying, vacuum coating, and sputtering coating. The coating has a dense structure and has the characteristics of high hardness and high toughness. It can effectively improve the wear resistance and corrosion resistance of the substrate and extend the service life of the equipment. At the same time, the zirconia ceramic coating also has excellent thermal insulation properties, which can reduce the surface temperature of the substrate and reduce energy consumption. Thin dense chromium coating is a hard chromium coating deposited by a highly controlled electroplating process. It provides a very hard and very dense coating, and because of its spherical surface finish, it has excellent wear resistance and extremely low friction. Alumina ceramic coating is a highly insulating ceramic coating to achieve insulation of the pressure reducing valve, avoid conductivity of the pressure reducing valve, and improve practicality. DLC coating has a hardness similar to diamond and a low friction coefficient. Due to its special chemical structure, DLC coating has excellent properties such as high hardness, low friction, wear resistance, and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of a preferred embodiment of a rust-proof and high-temperature resistant pressure reducing valve provided by the utility model;

[0016] Figure 2 for Figure 1 The schematic diagram of the cross-sectional structure of the first shell shown;

[0017] Figure 3 for Figure 1Schematic diagram of the gasket installation structure is shown.

[0018] In the figure: 1. first shell; 101. base layer; 102. zirconium oxide coating; 103. thin dense chrome coating; 104. alumina ceramic coating; 105. DLC coating; 2. second shell; 3. spring; 4. top plate; 5. elastic membrane; 6. air inlet pipe; 7. air outlet pipe; 8. first air groove; 9. second air groove; 10. screw; 11. crank; 12. sealing gasket; 13. pressure gauge. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0020] Embodiment: A rust-proof and high-temperature resistant pressure reducing valve, such as Figure 1-Figure 3As shown, it includes: a first shell 1, a second shell 2 is fixedly installed on the bottom of the first shell 1 by screws, a spring 3 is fixedly installed at the center point of the bottom of the second shell 2, a top plate 4 is fixedly installed on the top of the spring 3, an elastic membrane 5 is fixedly installed between the first shell 1 and the second shell 2 and above the top plate 4, the first shell 1 includes a base layer 101, a zirconium oxide coating 102 is adhered to one side of the base layer 101, a thin dense chrome coating 103 is adhered to the outside of the zirconium oxide coating 102, and the outside of the thin dense chrome coating 103 is adhered to the outside There is an alumina ceramic coating 104, and the outside of the alumina ceramic coating 104 is adhered with a DLC coating 105. The DLC coating 105 is a thin film composed of carbon atoms. When the internal pressure of the first shell 1 and the second shell 2 is relatively large, the elastic membrane 5 is deformed, and the elastic membrane 5 is sunken into the inside of the second shell 2. The elastic membrane 5 drives the top plate 4 to move downward. At this time, the spring 3 is compressed, thereby expanding the space between the first shell 1 and the elastic membrane 5, thereby playing a role in reducing pressure. In particular, when the valve is closed, the sudden closing causes the internal air pressure value to increase instantly. The elastic membrane 5, the top plate 4 and the spring 3 are arranged to reduce pressure, avoid valve damage and improve practicality. The zirconium oxide coating 102 is prepared by advanced technologies such as plasma spraying, vacuum coating and sputtering coating. The coating has a dense structure and has the characteristics of high hardness and high toughness. It can effectively improve the wear resistance and corrosion resistance of the substrate and extend the service life of the equipment. At the same time, the zirconium oxide ceramic coating also has excellent thermal insulation performance, which can reduce the surface temperature of the substrate and reduce energy consumption. The thin dense chromium coating 103 is a hard chromium coating deposited by a highly controlled electroplating process. It provides a very hard and very dense coating, and because the surface finish is spherical, it has excellent wear resistance and extremely low friction. The alumina ceramic coating 104 is a highly insulating ceramic coating to achieve insulation of the pressure reducing valve, avoid electrical conductivity of the pressure reducing valve and improve practicality. The DLC coating 105 has a hardness similar to that of diamond and a low friction coefficient. Due to its special chemical structure, the DLC coating 105 has excellent properties such as high hardness, low friction, wear resistance and corrosion resistance.

[0021] An air inlet pipe 6 is fixedly installed on one side of the outside of the first shell 1, and an air outlet pipe 7 is fixedly installed on the other side of the outside of the first shell 1. A second air groove 9 is opened at the center point of the inside of the first shell 1, and a first air groove 8 is opened inside the first shell 1 and outside the second air groove 9. A one-way flow structure is formed between the air inlet pipe 6, the first air groove 8, the second air groove 9 and the air outlet pipe 7. A screw 10 is threadedly connected at the center point of the top of the first shell 1, and a crank 11 is connected to the keyway at the center point of the top of the screw 10. A sealing gasket 12 is rotatably installed at the bottom of the screw 10 and located inside the second air groove 9. Turning the crank 11 drives the screw 10 to rotate, and the rotation of the screw 10 drives the sealing gasket 12 to move upward, and the sealing gasket 12 moves to the top of the air outlet pipe 7. At this time, the gas enters the inside of the first air groove 8 through the air inlet pipe 6, and the gas moves to the bottom of the second air groove 9 and enters the second air groove 9, and is finally discharged through the air outlet pipe 7. The crank 11 is rotated in the opposite direction, and the sealing gasket 12 moves to the bottom of the air outlet pipe 7, thereby closing the valve body.

[0022] A pressure gauge 13 is disposed outside the first housing 1 , and the pressure gauge 13 effectively displays the pressure value inside the pressure reducing valve.

[0023] The working principle of the anti-corrosion and high temperature resistant pressure reducing valve provided by the utility model is as follows:

[0024] Step 1: When the internal pressure of the first shell 1 and the second shell 2 is relatively large, the elastic membrane 5 is deformed, and the elastic membrane 5 is sunken into the interior of the second shell 2. The elastic membrane 5 drives the top plate 4 to move downward. At this time, the spring 3 is compressed, thereby expanding the space between the first shell 1 and the elastic membrane 5, thereby playing a role in reducing pressure. In particular, when closing the valve, the sudden closure causes the internal air pressure value to increase instantly. Through the arrangement between the elastic membrane 5, the top plate 4 and the spring 3, a decompression effect is played, thereby avoiding valve damage and improving practicality.

[0025] Step 2: Turn the crank 11 to drive the screw 10 to rotate, and the rotation of the screw 10 drives the sealing gasket 12 to move upward. The sealing gasket 12 moves to the top of the outlet pipe 7. At this time, the gas enters the first gas groove 8 through the inlet pipe 6, and the gas moves to the bottom of the second gas groove 9 and enters the second gas groove 9, and finally is discharged through the outlet pipe 7. Turn the crank 11 in the opposite direction, and the sealing gasket 12 moves to the bottom of the outlet pipe 7, thereby closing the valve body.

[0026] Finally, it should be pointed out that the above embodiments are only representative examples of the present utility model. Obviously, the present utility model is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model should be considered to belong to the protection scope of the present utility model.

Claims

1. A corrosion-resistant and high-temperature-resistant pressure reducing valve, comprising: A first shell (1), characterized in that: a second shell (2) is fixedly mounted on the bottom of the first shell (1) by screws, a spring (3) is fixedly mounted at the center point of the bottom of the second shell (2), a top plate (4) is fixedly mounted on the top of the spring (3), an elastic membrane (5) is fixedly mounted between the first shell (1) and the second shell (2) and above the top plate (4), the first shell (1) comprises a base layer (101), a zirconium oxide coating (102) is disposed on one side of the outside of the base layer (101), a thin dense chromium coating (103) is disposed on the outside of the zirconium oxide coating (102), an aluminum oxide ceramic coating (104) is disposed on the outside of the thin dense chromium coating (103), and a DLC coating (105) is disposed on the outside of the aluminum oxide ceramic coating (104).

2. The anti-corrosion and high temperature resistant pressure reducing valve according to claim 1, characterized in that: An air inlet pipe (6) is fixedly mounted on one side of the exterior of the first shell (1), and an air outlet pipe (7) is fixedly mounted on the other side of the exterior of the first shell (1).

3. The anti-corrosion and high temperature resistant pressure reducing valve according to claim 2, characterized in that: A second air groove (9) is provided at the center point inside the first shell (1), a first air groove (8) is provided inside the first shell (1) and outside the second air groove (9), and a one-way flow structure is formed between the air inlet pipe (6), the first air groove (8), the second air groove (9) and the air outlet pipe (7).

4. The anti-corrosion and high temperature resistant pressure reducing valve according to claim 3, characterized in that: A screw rod (10) is threadedly connected at the top center point of the first shell (1), a crank handle (11) is keyed at the top center point of the screw rod (10), and a sealing gasket (12) is rotatably installed at the bottom end of the screw rod (10) and located inside the second air groove (9).

5. The anti-corrosion and high temperature resistant pressure reducing valve according to claim 4, characterized in that: A pressure gauge (13) is provided outside the first shell (1).

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