A diaphragm valve suitable for low temperature environments

Abstract

The utility model discloses a diaphragm valve suitable for low temperature environment relates to diaphragm valve technical field, and this diaphragm valve includes diaphragm valve main part, and the outer portion of diaphragm valve main part sets up respectively first protective housing and second protective housing, and first protective housing and second protective housing are adapted between, the both sides of first protective housing's outside all are provided with mounting mechanism. The utility model discloses the combination design of first protective housing and second protective housing provides reliable low temperature protection for diaphragm valve main part, wherein the multilayer structure cooperation of first protective housing and second protective housing, 304 stainless steel base layer is resistant to super low temperature and anticorrosion, and polyurethane foam heat insulation layer and space layer effectively block the internal and external temperature difference, and aluminum foil composite film moistureproof layer prevents water vapor permeation and influences heat preservation, and carbon fiber reinforced composite material protective layer improves overall strength and is resistant to low temperature brittle fracture, and cooperate electric heating layer can actively warm and prevent frost, ensure that diaphragm valve works stably under low temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm valve technology, specifically a diaphragm valve suitable for low-temperature environments. Background Technology

[0002] A diaphragm valve is a gate valve that uses a diaphragm as the opening and closing element to close the flow channel, cut off the fluid, and separate the valve body cavity from the valve cover cavity. The diaphragm is usually made of elastic, corrosion-resistant, and non-permeable materials such as rubber and plastic. The valve body is mostly made of plastic, fiberglass, ceramic, or metal lined with rubber. It has a simple structure, good sealing and corrosion resistance, and low fluid resistance. It is used for low-pressure, low-temperature, highly corrosive media and media containing suspended substances. According to the structural form, it can be divided into ridge type, gate type, and gate valve type.

[0003] Existing diaphragm valves are not easy to effectively resist the effects of ultra-low temperatures on the valve body. Low temperatures can easily cause components to become brittle, reduce sealing performance, and weaken insulation performance. They are also difficult to block the temperature difference between the inside and outside, and are prone to icing of the valve body or failures caused by sudden temperature changes.

[0004] Based on this, a diaphragm valve suitable for low-temperature environments is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a diaphragm valve suitable for low-temperature environments, so as to solve the problem of poor low-temperature resistance in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A diaphragm valve suitable for low-temperature environments includes a diaphragm valve body. A first protective shell and a second protective shell are respectively provided on the outside of the diaphragm valve body, and the first protective shell and the second protective shell are adapted to each other. An installation mechanism is provided on both sides of the outside of the first protective shell, and a fixing plate is provided on both sides of the outside of the second protective shell. A connection port is provided on one side of both the first protective shell and the second protective shell.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: the second protective shell includes a base layer, the interior of which has a void layer, and an electric heating layer is attached to one side of the base layer, wherein the electric heating layer is electrically connected to the connection port.

[0010] In one alternative: a heat insulation layer is attached to the other side of the base layer, a moisture-proof layer is attached to one side of the heat insulation layer, and a protective layer is attached to one side of the moisture-proof layer.

[0011] In one alternative: the base layer is made of stainless steel, the heat insulation layer is made of polyurethane foam, the moisture-proof layer is made of aluminum foil composite film, and the protective layer is made of carbon fiber reinforced composite material.

[0012] In one alternative: flanges are provided at both ends of the diaphragm valve body.

[0013] In one alternative embodiment: the mounting mechanism includes a mounting base disposed on one side of the first protective shell, a rotating rod rotatably mounted inside the mounting base via a pin, one end of the rotating rod being provided with a threaded post, one end of the threaded post being provided with a limit plate, and a knob being threadedly connected to the outside of the threaded post.

[0014] In one alternative: a groove is provided on the top of the fixing plate, and the rotating rod passes through the groove through the fixing plate.

[0015] In one alternative: the diaphragm valve body has a diaphragm inside, the diaphragm being made of fluororubber and having a metal fiber reinforcing mesh embedded inside.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model provides reliable low-temperature protection for the diaphragm valve body through the combined design of the first protective shell and the second protective shell. The multi-layer structure of the first protective shell and the second protective shell works synergistically. The 304 stainless steel base layer is resistant to ultra-low temperatures and corrosion. The polyurethane foam insulation layer and the air gap layer effectively block the temperature difference between the inside and outside. The aluminum foil composite film moisture-proof layer prevents water vapor penetration and affects the heat preservation. The carbon fiber reinforced composite material protective layer improves the overall strength and resists low-temperature brittleness. With the electric heating layer, it can actively heat up and prevent freezing, ensuring that the diaphragm valve works stably in low-temperature environments.

[0018] 2. The installation mechanism of this utility model achieves quick installation and disassembly of the protective shell through the cooperation of the rotating rod, threaded column, knob and fixing plate. The operation is simple and the maintenance is convenient. The valve diaphragm adopts a composite structure of fluororubber embedded with metal fiber reinforcement mesh, which has a wide low temperature resistance range and high strength, further ensuring the sealing performance and service life under low temperature conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the first protective shell installation structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the installation mechanism of this utility model.

[0022] Figure 4 This is a cross-sectional view of the second protective shell of this utility model.

[0023] Figure reference numerals: 1. Diaphragm valve body; 2. First protective shell; 3. Second protective shell; 31. Base layer; 32. Air gap layer; 33. Electric heating layer; 34. Heat insulation layer; 35. Moisture-proof layer; 36. Protective layer; 4. Mounting mechanism; 41. Mounting base; 42. Rotating rod; 43. Threaded post; 44. Limiting plate; 45. Knob; 5. Fixing plate; 6. Connection port; 7. Flange; 8. Groove. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] In one embodiment, such as Figures 1-4 As shown, a diaphragm valve suitable for low-temperature environments includes a diaphragm valve body 1. A first protective shell 2 and a second protective shell 3 are respectively provided on the outside of the diaphragm valve body 1, and the first protective shell 2 and the second protective shell 3 are adapted to each other. Mounting mechanisms 4 are provided on both sides of the outside of the first protective shell 2, and fixing plates 5 are provided on both sides of the outside of the second protective shell 3. A connection port 6 is provided on one side of the first protective shell 2 and the second protective shell 3. Flanges 7 are provided at both ends of the diaphragm valve body 1.

[0026] In this embodiment, the diaphragm valve body 1 is installed to the pipeline via flange 7. When the diaphragm valve body 1 operates in a low-temperature environment, the first protective shell 2 and the second protective shell 3 are installed on the outside of the diaphragm valve body 1, so that the diaphragm valve body 1 has the function of antifreeze. Furthermore, the first protective shell 2 and the second protective shell 3 can be easily installed or removed via the installation mechanism 4, which improves practicality.

[0027] In one embodiment, such as Figure 1 and Figure 4As shown, the second protective shell 3 includes a base layer 31, with a gap layer 32 inside the base layer 31. An electric heating layer 33 is attached to one side of the base layer 31, and the electric heating layer 33 is electrically connected to the connection port 6. A heat insulation layer 34 is attached to the other side of the base layer 31. A moisture-proof layer 35 is attached to one side of the heat insulation layer 34, and a protective layer 36 is attached to one side of the moisture-proof layer 35. The base layer 31 is made of 304 stainless steel, the heat insulation layer 34 is made of polyurethane foam, the moisture-proof layer 35 is made of aluminum foil composite film, and the protective layer 36 is made of carbon fiber reinforced composite material. When the temperature of the diaphragm valve body 1 is too low, the connection port 6 connects to the wire, causing the electric heating layer 33 to work and generate heat, thereby increasing the internal temperature of the second protective shell 3 and the first protective shell 2, and further increasing the temperature of the diaphragm valve body 1, giving the diaphragm valve body 1 an antifreeze function. The base layer 31 is resistant to low temperatures of -200℃ and is corrosion resistant. The air gap layer 32 plays a role in heat insulation. The heat insulation layer 34 has a low thermal conductivity and excellent heat preservation performance, further improving the heat insulation effect. The moisture-proof layer 35 has good air-proof and reflective heat insulation effects. It is attached to the outside of the heat insulation layer to block water vapor penetration and reflect external radiant heat. The protective layer 36 has high strength and is resistant to low-temperature brittleness.

[0028] In one embodiment, such as Figure 2 and Figure 3 As shown, the mounting mechanism 4 includes a mounting base 41, which is disposed on one side of the first protective shell 2. A rotating rod 42 is rotatably mounted inside the mounting base 41 via a pin. One end of the rotating rod 42 is provided with a threaded post 43, and one end of the threaded post 43 is provided with a limit plate 44. A knob 45 is threadedly connected to the outside of the threaded post 43. A groove 8 is formed on the top of the fixing plate 5, and the rotating rod 42 passes through the groove 8 through the fixing plate 5, thus mounting the first protective shell 2 and the second protective shell 3 onto the diaphragm valve body 1. When installed externally, the second protective shell 3 and the first protective shell 2 are fitted onto the outside of the diaphragm valve body 1. The rotating rod 42 is rotated, and the rotating rod 42 passes through the groove 8 and through the fixing plate 5. Then the knob 45 is rotated, and the knob 45 moves downward to fit against the fixing plate 5, thereby fixing the second protective shell 3 and the first protective shell 2. When disassembly is required, the knob 45 is rotated in the opposite direction, and the knob 45 moves upward to separate from the fixing plate 5. Then the rotating rod 42 is rotated, and the second protective shell 3 and the first protective shell 2 can be separated. This structure is simple and has the function of easy installation and disassembly.

[0029] In one embodiment, such as Figure 1 and Figure 2As shown, the diaphragm valve body 1 has a diaphragm inside. The diaphragm is made of fluororubber and has a metal fiber reinforcement mesh embedded inside. The composite structure of fluororubber and metal fiber reinforcement mesh improves the strength of the diaphragm. The working temperature range is -196℃ to 80℃, and it has the function of low temperature resistance.

[0030] The above embodiment discloses a diaphragm valve suitable for low-temperature environments. The diaphragm valve body 1 is installed to the pipeline via flange 7. When the diaphragm valve body 1 is working in a low-temperature environment, the first protective shell 2 and the second protective shell 3 are installed on the outside of the diaphragm valve body 1. The rotating rod 42 is rotated, and the rotating rod 42 passes through the fixing plate 5 through the groove 8. Then the knob 45 is rotated, and the knob 45 moves downward to fit against the fixing plate 5, thereby fixing the second protective shell 3 and the first protective shell 2.

[0031] When the temperature of the diaphragm valve body 1 is too low, the connection port 6 connects to the wire, causing the electric heating layer 33 to work and generate heat, thereby increasing the internal temperature of the second protective shell 3 and the first protective shell 2, and further increasing the temperature of the diaphragm valve body 1, giving the diaphragm valve body 1 an antifreeze function. The base layer 31 is resistant to low temperatures of -200℃ and is corrosion resistant. The air gap layer 32 plays a role in heat insulation. The heat insulation layer 34 has a low thermal conductivity and excellent heat preservation performance, further improving the heat insulation effect. The moisture-proof layer 35 has good air-proof and reflective heat insulation effects. It is attached to the outside of the heat insulation layer to block water vapor penetration and reflect external radiant heat. The protective layer 36 has high strength and is resistant to low-temperature brittleness. When disassembly is required, turn the knob 45 in the opposite direction. The knob 45 moves upward and separates from the fixing plate 5. Then turn the rotating rod 42. At this time, the second protective shell 3 and the first protective shell 2 can be separated.

[0032] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A diaphragm valve suitable for low-temperature environments, comprising a diaphragm valve body (1), characterized in that, The diaphragm valve body (1) is provided with a first protective shell (2) and a second protective shell (3) on its exterior, and the first protective shell (2) and the second protective shell (3) are compatible with each other. The first protective shell (2) is provided with an installation mechanism (4) on both sides of its exterior, and the second protective shell (3) is provided with a fixing plate (5) on both sides of its exterior. The first protective shell (2) and the second protective shell (3) are provided with a connection port (6) on one side.

2. A diaphragm valve suitable for low-temperature environments according to claim 1, characterized in that, The second protective shell (3) includes a base layer (31), an air gap layer (32) is provided inside the base layer (31), an electric heating layer (33) is attached to one side of the base layer (31), and the electric heating layer (33) is electrically connected to the connection port (6).

3. A diaphragm valve suitable for low-temperature environments according to claim 2, characterized in that, A heat insulation layer (34) is attached to the other side of the base layer (31), a moisture-proof layer (35) is attached to one side of the heat insulation layer (34), and a protective layer (36) is attached to one side of the moisture-proof layer (35).

4. A diaphragm valve suitable for low-temperature environments according to claim 3, characterized in that, The base layer (31) is made of 304 stainless steel, the heat insulation layer (34) is made of polyurethane foam, the moisture-proof layer (35) is made of aluminum foil composite film, and the protective layer (36) is made of carbon fiber reinforced composite material.

5. A diaphragm valve suitable for low-temperature environments according to claim 1, characterized in that, Flanges (7) are provided at both ends of the diaphragm valve body (1).

6. A diaphragm valve suitable for low-temperature environments according to claim 1, characterized in that, The mounting mechanism (4) includes a mounting base (41), which is located on one side of the first protective shell (2). A rotating rod (42) is rotatably mounted inside the mounting base (41) via a pin. A threaded post (43) is provided at one end of the rotating rod (42), and a limit plate (44) is provided at one end of the threaded post (43). A knob (45) is threadedly connected to the outside of the threaded post (43).

7. A diaphragm valve suitable for low-temperature environments according to claim 6, characterized in that, The top of the fixing plate (5) is provided with a groove (8), and the rotating rod (42) passes through the fixing plate (5) through the groove (8).

8. A diaphragm valve suitable for low-temperature environments according to claim 1, characterized in that, The diaphragm valve body (1) is provided with a diaphragm inside, the diaphragm is made of fluororubber and has a metal fiber reinforcement mesh embedded inside.

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