Composite flange

Abstract

The composite flange comprises a flange plate and a base tube, a base hole, an insertion hole and an end hole are sequentially formed in the flange plate in the axis direction of the flange plate, the base hole and the end hole are communicated with the two sides of the flange plate respectively, the inner diameter of the insertion hole is larger than that of the base hole, and one end of the base tube is inserted into the insertion hole in a matched mode and abuts against the inner end wall of the insertion hole. A stainless steel hot melting layer is fixed in an annular clamping cavity formed between the outer wall of the base tube and the inner wall of the inserting hole in a hot melting mode, and a welding flux belt formed after welding and cooling is arranged in an annular welding pool formed between the outer wall of the base tube and the inner wall of the end hole. According to the composite flange, the stainless steel hot melting layer is used for filling, the flange plate and the base pipe are fixed, the sealing effect between the inner wall of the inserting hole and the outer wall of the base pipe is guaranteed, the flange plate and the base pipe are further reinforced through the welding flux belt, and meanwhile the welding flux belt surrounds the base pipe by a circle, so that the sealing effect is further improved; therefore, the composite flange is stable in overall structure, high in strength, good in sealing performance and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a composite flange. Background Art

[0002] Flange is a component commonly used for pipe connection. It is usually made of annular metal or alloy, with a certain thickness and holes for mounting bolts. Flanges are widely used in the industrial field, especially in pipeline systems, to connect pipes, valves, pipe fittings and other equipment to ensure the sealing and stability of the pipeline system.

[0003] A flange in the prior art consists of a flange plate and a base pipe. One end of the base pipe is inserted into the center hole of the flange plate and welded to the flange plate. However, the traditional welding method and process structure are not strong enough, and it is difficult to ensure long-term and effective sealing, and the service life is short. Utility Model Content

[0004] The utility model aims to provide a composite flange with a long service life, which effectively solves the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0006] A composite flange comprises a flange plate and a base pipe. A base hole, a plug hole and an end hole are sequentially arranged in the flange plate along its axial direction. The base hole and the end hole are respectively connected to two sides of the flange plate. The inner diameter of the plug hole is larger than the inner diameter of the base hole. One end of the base pipe is matched and inserted into the plug hole and abuts against the inner end wall of the plug hole. A stainless steel hot-melt layer is hot-melted and fixed in an annular clamping cavity formed between the outer wall of the base pipe and the inner wall of the plug hole. The annular weld pool formed between the outer wall of the base pipe and the inner wall of the end hole contains a solder strip formed after welding and cooling.

[0007] It can be seen that hot-melt stainless steel material is injected into the annular clamping cavity between the outer wall of the base pipe and the inner wall of the socket. After cooling, a stainless steel hot-melt layer is formed. The filling of the stainless steel hot-melt layer can not only achieve the fixation of the flange and the base pipe, but also ensure the sealing effect between the inner wall of the socket and the outer wall of the base pipe. The flange and the base pipe are further reinforced by surfacing welding in the annular weld pool formed between the inner wall of the end hole and the outer wall of the base pipe. At the same time, the solder belt surrounds the base pipe to further improve the sealing effect.

[0008] Furthermore, a pair of positioning rods are symmetrically provided on the inner end wall of the jack near the base hole, and a pair of positioning holes are provided on the end of the base pipe. When the end of the base pipe is inserted into the jack, the positioning rods are aligned one by one and inserted into the positioning holes.

[0009] The positioning rod is inserted into the positioning hole to ensure the positioning of the base pipe, so as to ensure that the end of the base pipe inserted into the insertion hole is centered, so that the cross-sectional sizes of various parts of the annular clamp cavity are consistent, thereby ensuring that the stainless steel hot-melt layer is evenly distributed and improving the overall structural strength.

[0010] Furthermore, the inner diameter of the end hole becomes smaller as it is farther away from the base hole, so that the cross-sections of the annular solder pool and the solder strip are adapted wedge shapes.

[0011] The annular weld pool is wedge-shaped with the cross section of the solder strip, which can better fill the weld and make the welding process more stable and uniform, which helps to ensure the integrity and strength of the welded joint, while making the heat distribution during the welding process uniform, reducing the occurrence of welding deformation and improving the welding quality.

[0012] Furthermore, a plurality of inner cavities are arranged in a circular array around the insertion hole in the flange, and a stainless steel reinforcing rib is fixed in each inner cavity.

[0013] Stainless steel reinforcement ribs arranged in the flange around the base pipe array can enhance the structural strength and durability of the flange and further improve its service life.

[0014] Furthermore, an annular groove is provided around the axis of the flange on one side of the flange away from the end hole, a rubber sealing ring is fixed in the annular groove, and fixing holes are evenly distributed on the flange. There are four fixing holes, and both ends of each fixing hole are through.

[0015] During docking, the sealing of the joint is improved by squeezing the rubber sealing ring.

[0016] Furthermore, an inner lining body is compositely fixed on the inner wall of the base pipe, and the inner lining body is made of carbon fiber composite material.

[0017] Carbon fiber composite materials are used as the lining of the inner wall of the base pipe, which is in direct contact with the conveying medium, has the effects of impact resistance and corrosion resistance, prevents the base pipe from corroding from the inside out, and thus increases the service life of the base pipe.

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

[0019] 1. The utility model injects hot-melt stainless steel into the annular clamping cavity between the outer wall of the base pipe and the inner wall of the plug hole. After cooling, a stainless steel hot-melt layer is formed. The filling of the stainless steel hot-melt layer can not only achieve the fixation of the flange and the base pipe, but also ensure the sealing effect between the inner wall of the plug hole and the outer wall of the base pipe. The flange and the base pipe are fixed by surfacing welding in the annular welding pool formed between the inner wall of the end hole and the outer wall of the base pipe to form a solder belt, which further reinforces the flange and the base pipe. At the same time, the solder belt surrounds the base pipe for a week, which further improves the sealing effect, so that the overall structure of the composite flange is stable, the strength is high, and the sealing is good, and it has a long service life.

[0020] 2. The utility model utilizes a positioning rod to align and insert into the positioning hole to ensure the positioning of the base pipe, ensuring that the end of the base pipe inserted into the insertion hole is centered, thereby making the cross-sectional sizes of various parts of the annular clamp cavity consistent, thereby ensuring that the stainless steel hot-melt layer is evenly distributed and improving the overall structural strength.

[0021] 3. The annular welding pool in the utility model is wedge-shaped with the cross section of the solder strip, which can better fill the weld and make the welding process more stable and uniform. This helps to ensure the integrity and strength of the welded joint, while making the heat distribution during the welding process uniform, reducing the occurrence of welding deformation and improving the welding quality.

[0022] 4. The utility model can enhance the structural strength and durability of the flange by arranging stainless steel reinforcing ribs in the flange around the base pipe array, thereby further improving the service life. At the same time, carbon fiber composite materials are used as the lining body of the inner wall of the base pipe, which is in direct contact with the conveying medium, has the effects of impact resistance and corrosion resistance, and avoids the base pipe from being corroded from the inside out, thereby improving the service life of the base pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the three-dimensional schematic diagrams of the overall structure of the utility model;

[0024] Figure 2 This is the second three-dimensional schematic diagram of the overall structure of the utility model;

[0025] Figure 3 It is a schematic diagram of the partial structure of the flange surface in the utility model;

[0026] Figure 4 It is a schematic diagram of the local structure of the surface of the base tube in the utility model;

[0027] Figure 5 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the flange in the utility model;

[0029] Figure 7 for Figure 5 A schematic diagram of the enlarged structure in the middle.

[0030] In the figure: 1, flange; 101, inner cavity; 102, stainless steel reinforcement rib; 103, fixing hole; 104, annular groove; 105, rubber sealing ring; 11, base hole; 12, plug hole; 121, positioning rod; 13, end hole; 2, base pipe; 201, annular clamping cavity; 202, stainless steel hot melt layer; 203, annular welding pool; 204, solder strip; 21, positioning hole; 22, lining body. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1-Figure 7 The utility model provides a composite flange, including a flange plate 1 and a base pipe 2. A base hole 11, a plug hole 12 and an end hole 13 are sequentially arranged in the flange plate 1 along its axial direction. The base hole 11 and the end hole 13 are respectively connected with two sides of the flange plate 1. The inner diameter of the plug hole 12 is larger than the inner diameter of the base hole 11. One end of the base pipe 2 is matched and inserted into the plug hole 12 and abuts against the inner end wall of the plug hole 12. A stainless steel hot-melt layer 202 is hot-melted and fixed in an annular clamping cavity 201 formed between the outer wall of the base pipe 2 and the inner wall of the plug hole 12. A solder strip 204 formed after welding and cooling is contained in an annular welding pool 203 formed between the outer wall of the base pipe 2 and the inner wall of the end hole 13.

[0033] The bottom end of the base pipe 2 is matched and inserted into the insertion hole 12, and abutted against the inner end wall of the insertion hole 12 to ensure that the base pipe 2 is connected to the base hole 11, and hot-melt stainless steel material is injected into the annular clamping cavity 201 between the outer wall of the base pipe 2 and the inner wall of the insertion hole 12. After cooling, a stainless steel hot-melt layer 202 is formed. The filling of the stainless steel hot-melt layer 202 is used to fix the flange 1 and the base pipe 2, and ensure the sealing effect between the inner wall of the insertion hole 12 and the outer wall of the base pipe 2. It is fixed by surfacing welding in the annular welding pool 203 formed between the inner wall of the end hole 13 and the outer wall of the base pipe 2 to form a solder belt 204, which further reinforces the flange 1 and the base pipe 2. At the same time, the solder belt 204 surrounds the base pipe 2 to further improve the sealing effect.

[0034] Specifically, a pair of positioning rods 121 are symmetrically provided on the inner end wall of the insertion hole 12 close to the base hole 11, and a pair of positioning holes 21 are provided on the end of the base pipe 2. When the end of the base pipe 2 is inserted into the insertion hole 12, the positioning rods 121 are aligned and inserted into the positioning holes 21 one by one. The positioning rods 121 are aligned and inserted into the positioning holes 21 to ensure the positioning of the base pipe 2, so that the end of the base pipe 2 inserted into the insertion hole 12 is centered, so that the cross-sectional sizes of various parts of the annular clamping cavity 201 are consistent, thereby ensuring that the stainless steel hot-melt layer 202 is evenly distributed and improving the overall structural strength.

[0035] Specifically, the inner diameter of the end hole 13 becomes smaller as it is farther away from the base hole 11, so that the cross-section of the annular weld pool 203 and the solder strip 204 is an adaptive wedge shape. The wedge-shaped cross-section can better fill the weld and make the welding process more stable and uniform, which helps to ensure the integrity and strength of the welded joint, while making the heat distribution during the welding process uniform, reducing the occurrence of welding deformation, and improving the welding quality.

[0036] Specifically, a plurality of inner cavities 101 are arranged in a circular array around the insertion hole 12 in the flange 1, and a stainless steel reinforcing rib 102 is fixed in each inner cavity 101, which can enhance the structural strength and durability of the flange 1 and further improve the service life.

[0037] Specifically, an annular groove 104 is provided around the axis of the flange 1 on the side of the flange 1 away from the end hole 13, and a rubber sealing ring 105 is fixed in the annular groove 104. During docking, the sealing of the connection is improved by squeezing the rubber sealing ring 105. The flange 1 is evenly distributed with fixing holes 103. There are four fixing holes 103, and both ends of each fixing hole 103 are through.

[0038] Specifically, a lining body 22 is compositely fixed on the inner wall of the base pipe 2. The lining body 22 is made of carbon fiber composite material. The lining body 22 is in direct contact with the conveying medium and has impact resistance and corrosion resistance, thereby preventing the base pipe 2 from corroding from the inside to the outside, thereby increasing the service life of the base pipe 2.

[0039] The above is a detailed description of the utility model in combination with specific embodiments, and it cannot be determined that the specific implementation methods of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, making several equivalent substitutions or obvious modifications without departing from the concept of the present invention, and having the same performance or use, should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. A composite flange, comprising a flange plate (1) and a base pipe (2), characterized in that: The flange (1) is provided with a base hole (11), a plug hole (12) and an end hole (13) in sequence along the axial direction thereof, and the base hole (11) and the end hole (13) are respectively connected to two sides of the flange (1); The inner diameter of the insertion hole (12) is larger than the inner diameter of the base hole (11); One end of the base tube (2) is matched and inserted into the insertion hole (12) and abuts against the inner end wall of the insertion hole (12); A stainless steel hot-melt layer (202) is hot-melted and fixed in the annular clamping cavity (201) formed between the outer wall of the base tube (2) and the inner wall of the insertion hole (12); The annular welding pool (203) formed between the outer wall of the base tube (2) and the inner wall of the end hole (13) contains a solder strip (204) formed after welding and cooling.

2. A composite flange according to claim 1, characterized in that: A pair of positioning rods (121) are symmetrically provided on the inner end wall of the insertion hole (12) close to the base hole (11); A pair of positioning holes (21) are provided on the end of the base tube (2); when the end of the base tube (2) is inserted into the insertion hole (12), the positioning rods (121) are aligned one by one and inserted into the positioning holes (21).

3. A composite flange according to claim 1, characterized in that: The inner diameter of the end hole (13) decreases as it moves away from the base hole (11), so that the cross-sections of the annular solder pool (203) and the solder strip (204) are in a matching wedge shape.

4. A composite flange according to claim 1, characterized in that: A plurality of inner cavities (101) are arranged in a ring array around the insertion hole (12) in the flange (1), and a stainless steel reinforcing rib (102) is fixed in each of the inner cavities (101).

5. The composite flange according to claim 1, characterized in that: An annular groove (104) is provided on a side of the flange (1) away from the end hole (13) around the axis of the flange (1), and a rubber sealing ring (105) is fixed in the annular groove (104); The flange (1) is evenly distributed with fixing holes (103), the number of the fixing holes (103) is four, and both ends of each fixing hole (103) are connected.

6. A composite flange according to claim 1, characterized in that: An inner lining body (22) is compositely fixed on the inner wall of the base pipe (2), and the inner lining body (22) is made of carbon fiber composite material.

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