Corrosion-resistant metal insert flange transmitter diaphragm device and method of manufacture

Abstract

The application provides a corrosion-resistant metal plug-in flange transmitter diaphragm device and a manufacturing method thereof, which comprises a base (1), a barrel (2), a flange plug-in base (3), a barrel bushing (5), a base lining plate (4) and a flange sealing surface lining plate (6); the base (1) is provided with a flange in the center; the barrel bushing (5) is in a cylindrical shape and is sleeved on the barrel (2); the base lining plate (4) is in a hollow annular cylindrical shape and is connected with the base (1); the flange sealing surface lining plate (6) is in a hollow annular cylindrical shape and is connected with the flange plug-in base (3); the bottom side of the barrel bushing (5) is connected with the flange sealing surface lining plate (6); and the top side of the barrel bushing (5) is connected with the side of the base lining plate (4). The application reduces the cost, meets the corrosion prevention requirement and guarantees sufficient structural strength.

Description

Technical Field

[0001] This invention relates to flange transmitter technology, specifically to a corrosion-resistant metal insertion flange transmitter diaphragm device and its manufacturing method. Background Technology

[0002] Flange transmitters are mainly used in industrial environments with special installation requirements or special corrosive media. Depending on their installation method, there are different devices such as flat diaphragm flanges, insertion diaphragm flanges, threaded diaphragm flanges, level transmitters, and sanitary diaphragm flanges. Insertion diaphragm flanges are one of them.

[0003] Figure 1 The device on display is a standard insertion-type flange level transmitter. In the figure, 10 is the transmitter base, 20 is the connecting pipe, 30 is the flange, 40 is the screw, 50 is the flange insertion base, 60 is the cylinder, 70 is the base, 80 is the capillary tube, and 90 is the diaphragm. Figure 1 In the middle section, the flange insertion base 50 and the flange insertion cylinder (60, 70) are made of ordinary 316 stainless steel, which cannot adapt to the working environment of special corrosive media.

[0004] Currently, some people are also considering... Figure 1 Components 50, 60, and 70 are all made of special corrosion-resistant materials, such as tantalum, Hastelloy, and Monel. However, using these metals presents problems of high cost and difficult processing. Taking tantalum as an example, if components 50, 60, and 70 were all replaced with tantalum, the following issues would arise:

[0005] 1. Tantalum has a high density and is very expensive, costing more than 150 times that of 316 stainless steel. Using all tantalum materials would be extremely costly, and even using tantalum tubing to reduce material costs would still result in high costs.

[0006] 2. Tantalum has a melting point of 2980℃ and is a refractory metal, making it difficult to weld and fuse with other metals. Furthermore, tantalum tubes have low weld strength, making pure tantalum structures unsuitable for practical applications. Therefore, manufacturing all-tantalum insert flanges has always been a challenge in terms of both cost and structure. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a corrosion-resistant metal insertion flange transmitter diaphragm device and its manufacturing method. The technical solution of this invention is as follows:

[0008] A corrosion-resistant metal insertion flange transmitter diaphragm device includes: a base (1), a cylinder (2), a flange insertion base (3), a cylinder bushing (5), a base liner (4), and a flange sealing surface liner (6); wherein:

[0009] The base (1) has a flange at its center;

[0010] The cylindrical bushing (5) is cylindrical and is fitted onto the cylindrical body (2);

[0011] The base liner (4) is a ring-shaped cylinder with a hollow center, and it is connected to the base (1);

[0012] The flange sealing surface liner (6) is a ring-shaped cylinder with a hollow center, and it is connected to the flange insertion base (3).

[0013] The bottom side of the cylinder bushing (5) is connected to the flange sealing surface liner (6);

[0014] The top side of the cylinder bushing (5) is connected to the side of the base liner (4).

[0015] Optionally, the thickness of the cylinder bushing (5) is 3±0.5mm; the thickness of the base liner (4) is 5±0.5mm; and the thickness of the flange sealing surface liner (6) is 3-4mm.

[0016] Optionally, the base liner (4) is provided with a central hole, which is fitted onto the flange of the base (1) and is adapted to the shape of the flange;

[0017] A first annular groove (401) is provided at the mating point between the central hole and the flange; the bottom of the base liner (4) is in contact with the base (1), and a second annular groove (402) is provided at the junction of their outer circles.

[0018] Alternatively, the base liner (4) and the base (1) can be connected by injecting liquid metal adhesive into the first annular groove (401) and the second annular groove (402).

[0019] Optionally, the diaphragm device further includes: a diaphragm (7) and a diaphragm protection ring (8); one side of the diaphragm (7) is connected to the top of the base liner (4);

[0020] The diaphragm protection ring (8) is annular and is positioned on the edge of the diaphragm (7) on the other side. The diaphragm (7) is then fixed to the cylinder bushing (5) by welding.

[0021] Optionally, the liquid metal adhesive has the following characteristics:

[0022] At room temperature, the initial curing time is 7-12 minutes, and the complete curing time is 4-24 hours; the compressive strength is 14.5 MPa; the working temperature range is -60 to +120℃; and the linear expansion coefficient is 40 × 10⁻⁶. 6 / ℃; wherein, the room temperature is 20℃±5℃.

[0023] Optionally, the base (1), cylinder (2), and flange insertion base (3) are all made of stainless steel.

[0024] Optionally, the cylinder bushing (5), base liner (4), and flange sealing surface liner (6) are all made of special corrosion-resistant materials, such as tantalum, Hastelloy C-276, or Monel alloy.

[0025] A method for manufacturing a corrosion-resistant metal insertion flange transmitter diaphragm device, for manufacturing the aforementioned diaphragm device, includes the following steps:

[0026] S1: A base for a corrosion-resistant metal insert flange transmitter diaphragm device is provided, comprising: a base (1), a cylinder (2), and a flange insert base (3), wherein a flange is provided at the center of the base (1);

[0027] S2: The base liner (4) is fitted into the flange of the base (1) through the center hole, and the bottom of the base liner (4) is in contact with the base (1); a first annular groove (401) is provided at the connection between the center hole and the flange, and a second annular groove (402) is provided at the junction between the bottom of the base and the outer circle of the base;

[0028] S3: Liquid metal adhesive is injected into the first annular groove (401) and the second annular groove (402) respectively. After the adhesive is cured, the base liner (4) and the base (1) are fixed together.

[0029] S4: Fit the cylinder bushing (5) onto the cylinder body (2) and weld it at the connection between the cylinder bushing (5) and the end face of the base liner (4);

[0030] S5: Install the flange sealing face liner (6) on the flange insertion base (3), and weld the liner to the bottom side of the cylinder bushing (5);

[0031] S6: Fix the diaphragm (7) and the diaphragm protection ring (8) together and weld them together onto the cylinder bushing (5).

[0032] Optionally, the process between steps S5 and S6 may further include:

[0033] A corrugated surface is machined on the side of the base liner (4) and the base (1) where the corresponding diaphragm (7) is installed after curing.

[0034] Optionally, in step S3, the liquid metal adhesive has the following characteristics:

[0035] At room temperature, the initial curing time is 7-12 minutes, and the complete curing time is 4-24 hours; the compressive strength is 14.5 MPa; the working temperature range is -60 to +120℃; and the linear expansion coefficient is 40 × 10⁻⁶. 6 / ℃; wherein, the room temperature is 20℃±5℃.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] This invention uses stainless steel as the main body, which greatly reduces the proportion of special corrosion-resistant metal materials used and significantly lowers costs.

[0038] The present invention uses a bushing structure made of corrosion-resistant material to cover and protect the main body, thus ensuring its corrosion resistance.

[0039] This invention uses corrosion-resistant metal materials and ordinary stainless steel materials, and employs liquid metal encapsulation and curing. It has strong manufacturability, and compared with other complex processes (such as vacuum brazing), the process is simple, does not generate additional welding stress, and does not require the investment of other welding equipment.

[0040] This invention is highly scalable and can be applied to a variety of corrosion-resistant materials, such as tantalum, Hastelloy C-276, Monel alloy, etc.

[0041] This invention has strong applicability and can be modified in two ways: liquid level type and remote type.

[0042] The cylinder bushing, base liner, and flange sealing surface liner of this invention are all made of corrosion-resistant materials. While ensuring that the outer covering layer is made of corrosion-resistant materials, the use of corrosion-resistant materials is minimized, the cost is reduced, and sufficient structural strength is guaranteed. Attached Figure Description

[0043] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0044] Figure 1 This is a schematic diagram of the structure of a conventional insertion-type liquid level flange transmitter.

[0045] Figure 2 This is a schematic diagram of the base structure of a corrosion-resistant metal insertion flange transmitter diaphragm device according to a specific embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of a corrosion-resistant metal insertion flange transmitter diaphragm device according to a specific embodiment of the present invention;

[0047] Figure 4This is a flowchart illustrating a manufacturing method for a corrosion-resistant metal insertion flange transmitter diaphragm device according to a specific embodiment of the present invention. Detailed Implementation

[0048] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0049] like Figure 2 and Figure 3 This embodiment discloses a corrosion-resistant metal insertion flange transmitter diaphragm device, including: a base and cylinder bushing 5, a base liner 4, a flange sealing surface liner 6, a diaphragm 7, and a diaphragm protection ring 8. The base includes: a base 1, a cylinder 2, and a flange insertion base 3.

[0050] Wherein: the base 1 has a flange 101 at its center; the cylindrical bushing 5 is cylindrical and fits onto the cylindrical body 2; the base liner 4 is an annular cylinder with a hollow center and is connected to the base 1; the flange sealing surface liner 6 is an annular cylinder with a hollow center and is connected to the flange insertion base 3; the bottom side of the cylindrical bushing 5 is connected to the flange sealing surface liner 6; and the top side of the cylindrical bushing 5 is connected to the side of the base liner 4.

[0051] One side of the diaphragm 7 is connected to the top of the base liner 4; the diaphragm protection ring 8 is annular and is correspondingly disposed at the edge of the other side of the diaphragm 7, and the diaphragm 7 is fixed to the cylinder bushing 5 by combined welding. In this embodiment, the diaphragm 7 is a corrugated diaphragm, and the base liner 4 and the base 1 are processed with corrugated surfaces on the side corresponding to the diaphragm, and are corrugated in shape.

[0052] In this embodiment, the thickness of the cylinder bushing 5 is 3±0.5mm; the thickness of the base liner 4 is 5±0.5mm; and the thickness of the flange sealing surface liner 6 is 3-4mm.

[0053] The base liner 4 has a central hole that fits onto the flange 101 of the base and is adapted to the shape of the flange 101. A first annular groove 401 is provided at the mating point between the central hole and the flange. The bottom of the base liner 4 is in contact with the base 1, and a second annular groove 402 is provided at the junction of their outer circles.

[0054] Figure 3In the middle, the left side is the remote capillary connection structure, where: 9 is the connector between the diaphragm device and the transmitter base; 10 is the capillary component. The right side of the insertion cylinder includes a base 1, a cylinder body 2, a cylinder body bushing 5, a base liner 4, a diaphragm 7, and a diaphragm protection ring 8.

[0055] It should be noted that: Figure 3 This embodiment uses a remote capillary installation method; however, in specific implementations, this embodiment can also use methods such as... Figure 1 The present invention does not limit the specific installation method to the liquid level type installation method.

[0056] In this embodiment, the base liner 4 and the base 1 are connected by injecting liquid metal adhesive into the first and second annular grooves. The characteristics of the liquid metal adhesive are as follows:

[0057]

[0058] In the table, room temperature refers to a temperature of 20℃±5℃.

[0059] In this embodiment, the base 1, cylinder 2, and flange insertion base 3 are all made of stainless steel. In specific implementation, 316 stainless steel or 304 stainless steel can be used, depending on the user's site requirements. This invention does not limit the specific type of stainless steel.

[0060] The cylinder bushing 5, base liner 4, and flange sealing surface liner 6 are all made of special corrosion-resistant materials, such as tantalum, Hastelloy C-276, or Monel alloy.

[0061] See Figure 3 and Figure 4 This embodiment also discloses a method for manufacturing a corrosion-resistant metal insertion flange transmitter diaphragm device, used to manufacture the above-mentioned diaphragm device, including the following steps:

[0062] S1: A base for a corrosion-resistant insertion flange transmitter level diaphragm device is provided, comprising: a base 1, a cylinder 2, and a flange insertion base 3, wherein a flange 101 is provided at the center of the base 1.

[0063] S2: The base liner 4 is fitted into the flange 101 of the base 1 through the center hole, and the bottom of the base liner 4 is in contact with the base 1; a first annular groove 401 is provided at the connection between the center hole and the flange 101, and a second annular groove 402 is provided at the junction of the bottom of the base liner 4 and the outer circle of the base 1.

[0064] S3: Liquid metal adhesive is injected into the first annular groove 401 and the second annular groove 402 respectively. After the adhesive cures, the base liner 4 and the base 1 are fixed together. This step further includes:

[0065] exist Figure 3 Liquid metal adhesive was injected into the two shaded areas (first annular groove 401 and second annular groove 402) at room temperature. After curing, the adhesive integrated with the joined parts, allowing for subsequent machining. It exhibits high strength, excellent sealing performance, and a leak detection rate of 3*10⁻⁶ using helium mass spectrometry. -8 Pam 3 The application rate should be above 1000 m / s; the amount of adhesive applied should exceed the groove opening to allow for subsequent cutting and machining. After application, let it stand for at least 15 minutes before moving it to another location for complete curing, and this process should be maintained for at least 24 hours.

[0066] S4: The cylinder bushing 5 is fitted onto the cylinder body 2, and welding is performed at the connection between the cylinder bushing 5 and the end face of the base liner 4, with high-purity argon gas protection.

[0067] S5: Install the flange sealing surface liner 6 on the flange sealing ring 3, and weld the liner 6 to the bottom side of the cylinder bushing 5 by argon arc welding and use high-purity argon gas protection.

[0068] S6: Fix the diaphragm 7 and the diaphragm protective ring 8 together and weld them onto the cylinder bushing 5. Argon arc welding is used, with high-purity argon gas protection.

[0069] The step between steps S5 and S6 also includes:

[0070] A corrugated surface is machined on the side of the base liner 4 and the base 1 corresponding to the mounting diaphragm 7 after curing, and excess adhesive material on the outer circle is removed.

[0071] In step S3, the liquid metal adhesive has the following characteristics:

[0072]

[0073] In the table, room temperature refers to a temperature of 20℃±5℃.

[0074] In summary, this embodiment uses stainless steel as the main body, which greatly reduces the proportion of special corrosion-resistant metal materials used and significantly lowers costs.

[0075] In this embodiment, a bushing structure made of corrosion-resistant material is used to cover and protect the main body, thus ensuring its corrosion resistance.

[0076] This embodiment uses corrosion-resistant metal materials and ordinary stainless steel materials, which are cured by liquid metal encapsulation. It has strong manufacturability and is simpler than other complex processes (such as vacuum brazing). It does not generate additional welding stress and does not require the investment of other welding equipment.

[0077] This embodiment is highly scalable and can be applied to a variety of corrosion-resistant materials, such as tantalum, Hastelloy C-276, Monel alloy, etc.

[0078] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A corrosion-resistant metal insertion flange transmitter diaphragm device, comprising: The base (1), the cylinder body (2), and the flange insertion base (3) are characterized by further comprising: a cylinder body bushing (5), a base liner (4), and a flange sealing surface liner (6); wherein: The base (1) has a flange at its center; The cylindrical bushing (5) is cylindrical and is fitted onto the cylindrical body (2); The base liner (4) is a ring-shaped cylinder with a hollow center, and it is connected to the base (1); The flange sealing face liner (6) is a ring-shaped cylinder with a hollow center, and it is connected to the flange insertion base (3); The bottom side of the cylinder bushing (5) is connected to the flange sealing surface liner (6); The top side of the cylinder bushing (5) is connected to the side of the base liner (4); The base liner (4) has a central hole in the center, which is fitted onto the flange of the base (1) and is adapted to the shape of the flange. A first annular groove (401) is provided at the mating point between the central hole and the flange; the bottom of the base liner (4) is in contact with the base (1), and a second annular groove (402) is provided at the junction of their outer circles. The base liner (4) and the base (1) are connected by injecting liquid metal glue into the first annular groove (401) and the second annular groove (402); The properties of the liquid metal adhesive are as follows: At room temperature, the initial curing time is 7-12 minutes, and the complete curing time is 4-24 hours; the compressive strength is 14.5 MPa; the working temperature range is -60 to +120℃; and the linear expansion coefficient is 40 × 10⁻⁶. -6 / ℃; wherein, the room temperature is 20℃±5℃; The base (1), cylinder (2), and flange insertion base (3) are all made of stainless steel; The cylinder bushing (5), base liner (4), and flange sealing surface liner (6) are all made of special corrosion-resistant materials, namely tantalum, Hastelloy C-276, or Monel alloy. The thickness of the cylinder bushing (5) is 3±0.5mm; the thickness of the base liner (4) is 5±0.5mm; and the thickness of the flange sealing surface liner (6) is 3-4mm. It also includes: a diaphragm (7) and a diaphragm protection ring (8); one side of the diaphragm (7) is connected to the top of the base liner (4); The diaphragm protection ring (8) is annular and is positioned on the edge of the diaphragm (7) on the other side. The diaphragm (7) is then fixed to the cylinder bushing (5) by welding.

2. A method for manufacturing a diaphragm device for a corrosion-resistant metal insertion flange transmitter, characterized in that, The method for manufacturing the diaphragm device as described in claim 1 includes the following steps: S1: A base for a corrosion-resistant metal insert flange transmitter diaphragm device is provided, comprising: a base (1), a cylinder (2), and a flange insert base (3), wherein a flange is provided at the center of the base (1); S2: The base liner (4) is fitted into the flange of the base (1) through the center hole, and the bottom of the base liner (4) is in contact with the base (1); a first annular groove (401) is provided at the connection between the center hole and the flange, and a second annular groove (402) is provided at the junction of the bottom of the base and the outer circle of the base. S3: Liquid metal adhesive is injected into the first annular groove (401) and the second annular groove (402) respectively. After the adhesive is cured, the base liner (4) and the base (1) are fixed together. S4: Fit the cylinder bushing (5) onto the cylinder body (2) and weld it at the connection between the cylinder bushing (5) and the end face of the base liner (4); S5: Install the flange sealing face liner (6) on the flange insertion base (3), and weld the flange sealing face liner (6) to the bottom side of the cylinder bushing (5); S6: Fix the diaphragm (7) and the diaphragm protection ring (8) together and weld them together onto the cylinder bushing (5).

3. The manufacturing method of the corrosion-resistant metal insertion flange transmitter diaphragm device as described in claim 2, characterized in that, The step between S5 and S6 also includes: A corrugated surface is machined on the side of the base liner (4) and the base (1) where the corresponding diaphragm (7) is installed after curing.

4. The manufacturing method of the corrosion-resistant metal insertion flange transmitter diaphragm device as described in claim 2, characterized in that, In step S3, the characteristics of the liquid metal adhesive are as follows: At room temperature, the initial curing time is 7-12 minutes, and the complete curing time is 4-24 hours; the compressive strength is 14.5 MPa; the working temperature range is -60 to +120℃; and the linear expansion coefficient is 40 × 10⁻⁶. -6 / ℃; wherein, the room temperature is 20℃±5℃.

Images