Aluminum alloy flange for tight connection

Abstract

The utility model discloses an aluminum alloy flange for connection and fastening, which relates to the technical field of flanges and comprises two flange pipes, flange pieces are fixed at the ends, close to each other, of the flange pipes, and a screw rod is in basic threaded connection with a nut after penetrating through a through hole and a gasket. After the nut abuts against the gasket and the gasket abuts against the flange piece, the annular ring is arranged on the side, away from the gasket, of the nut in a sleeving mode, the inserting block is aligned to the position of the inserting groove and penetrates through the inserting groove till the end of the inserting block makes contact with the outer wall of the flange piece, the end of the inserting block is welded to the side face of the flange piece in a welding mode, and therefore the position of the inserting block cannot be changed; the annular ring can abut against the nut on the back, the inserting block can form limiting through penetrating of the inserting block and the inserting groove, in addition, the end point welding mode is adopted, the situation that the nut rotates and retreats cannot occur even if the nut is subjected to large medium vibration, and the fastening performance of the flange pipe and the flange piece after connection is ensured.

Description

Technical Field

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

[0002] The flanges and flange pipes of aluminum alloy flanges are made of aluminum alloy. The advantages of aluminum alloy flanges are mainly reflected in the following aspects:

[0003] Good corrosion resistance: Aluminum alloy has excellent chemical stability, which makes aluminum alloy flanges perform well in acid and alkali environments. It can resist corrosion from a variety of chemical media and extend the service life of the equipment. This feature is particularly important in the fields of chemical industry, shipbuilding, marine engineering, etc.

[0004] Light weight and high strength: Compared with other metal materials such as steel or copper, aluminum alloy flanges have a lower density and are therefore lighter in weight. However, their strength is quite high, and they can withstand large external forces and have good resistance. This feature makes aluminum alloy flanges have significant advantages in situations where it is necessary to reduce equipment weight and energy consumption, such as reducing hull mass and improving navigation efficiency in shipbuilding;

[0005] Good processing performance: Aluminum alloy flanges have excellent processing performance and can be processed into various shapes and sizes through stamping, casting, forging and other processes to meet different engineering requirements. This flexibility gives aluminum alloy flanges a higher degree of freedom in the design and manufacturing process;

[0006] High temperature and low temperature resistance: Aluminum alloy flanges also have certain high temperature and low temperature resistance, and can maintain stable performance in a wide temperature range, which makes it play an important role in some special environments, such as high temperature or low temperature piping systems;

[0007] Wide range of applications: Due to the combined effect of the above advantages, aluminum alloy flanges have been widely used in many fields. In addition to shipbuilding and chemical industries, they are also widely used in power equipment, aerospace, automobile manufacturing, machinery manufacturing, electronics industry and other fields. With the advancement of technology and changes in market demand, the application scope of aluminum alloy flanges will continue to expand;

[0008] In the process of implementing this solution, the inventors found that the following problems in the prior art have not been well solved: adjacent flanges are spliced ​​together by bolts / screws and nuts, and the impact generated when the medium flows in the pipeline is very easily transmitted to the screws and nuts. The vibration will cause the nuts to rotate and separate. Once the nuts are not tightly pressed against the side of the flanges, gaps will appear between the adjacent flanges, and the circulating medium will leak through the gaps, thereby creating certain safety hazards. Utility Model Content

[0009] The main purpose of the utility model is to provide a fastened aluminum alloy flange, which can effectively solve the problems in the background technology.

[0010] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0011] A fastened aluminum alloy flange includes two flange pipes, each of which is fixed with a flange sheet at one end close to each other, wherein a plurality of connection mechanisms are fixed to the side wall of one of the flange sheets, wherein the connection mechanisms include a screw and an annular ring, and a nut is threadedly connected to the outer wall of the screw away from the end of the flange sheet, and a gasket is provided on the side of the screw close to the flange sheet, and a plurality of slots are bored on the outer wall of the nut, and an insert equal to the number of slots is fixed to one end of the annular ring, and a through hole is bored at the position of the screw on the other flange sheet.

[0012] Preferably, the number of the gaskets on the screw is not less than two.

[0013] Preferably, the two flanges are in contact with each other, the screws are welded to the flanges at matching positions, the ends of the screws away from the flanges are respectively connected to the screws, and the nuts and flanges are in contact with the side walls of the gaskets at matching positions.

[0014] Preferably, the annular ring is respectively sleeved on one end of the screw passing through the nut, the plug blocks are respectively communicated with slots that match the position, and one end of the plug blocks passing through the slots are respectively in contact with the side walls of the adjacent flanges, and the contact points between the plug blocks and the flanges are welded.

[0015] Preferably, the inner diameter of the annular ring is larger than the outer diameter of the nut, and the annular ring contacts the adjacent side wall of the nut.

[0016] Preferably, a plurality of splines are fixed on the outer wall of the flange near the matching position of the screw, and a plurality of key slots are drilled inside the through-holes. The splines are respectively inserted into the key slots, and the lengths of the splines respectively match the lengths of the key slots, and the outer dimensions of the splines respectively match the inner dimensions of the key slots.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. After the screw passes through the through hole and the gasket, it is connected to the nut with a basic thread. When the nut is pressed against the gasket and the gasket is pressed against the flange, the annular ring is placed on the side of the nut away from the gasket, and the plug is aligned with the position of the slot and penetrated with it until the end of the plug contacts the outer wall of the flange, and the end of the plug is welded to the side of the flange by welding, so that the position of the plug cannot be changed. The annular ring can press against the nut from behind, and the plug can form a limit by penetrating the slot. In addition, the end point welding method ensures that the nut will not rotate and the thread will not be withdrawn even if it is subjected to large medium vibration, thereby ensuring the tightness of the flange pipe and flange after connection.

[0019] 2. Since there are two gaskets between the nut and the flange, the distance between the nut and the flange is enlarged, and a certain distance is also provided between the insert and the nut. This distance can be cut and separated by a small cutting device, so that when the nut needs to be removed later, the nut can be removed very easily after cutting and separation. At the same time, compared with the traditional method of welding between the flange and the nut, there will be no cutting damage to the flange and the nut during cutting. As a result, the present application has the effect of convenient disassembly on the basis of fastening the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a fastened aluminum alloy flange according to the present invention;

[0021] Figure 2 This is a schematic diagram of the exploded structure of a connection mechanism for fastening an aluminum alloy flange in the utility model;

[0022] Figure 3 This is a schematic diagram of the keyway structure of a fastened aluminum alloy flange according to the present invention;

[0023] Figure 4 This is a schematic diagram of the enlarged structure of point A of a fastened aluminum alloy flange of the present invention.

[0024] In the figure: 1. Flange pipe; 2. Flange; 21. Through hole; 22. Keyway; 3. Connecting mechanism; 31. Screw; 32. Spline; 33. Nut; 34. Gasket; 35. Slot; 36. Insert; 37. Ring. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figure 1-4As shown, a fastened aluminum alloy flange includes a flange pipe 1, two flange pipes 1, and flange plates 2 are fixed at the ends of the flange pipes 1 close to each other. Several connecting mechanisms 3 are fixed to the side wall of one flange plate 2. The connecting mechanism 3 includes a screw 31 and an annular ring 37. The outer wall of the screw 31 away from the end of the flange plate 2 is threadedly connected with a nut 33. The screw 31 is located on the side of the nut 33 close to the flange plate 2 and is sleeved with a gasket 34. The outer wall of the nut 33 is bored with several slots 35. One end of the annular ring 37 is fixed with an insert 36 equal to the number of slots 35. The other flange plate 2 is bored with a through hole 21 at the position of the screw 31.

[0027] Specifically, the number of washers 34 on the screw rod 31 is not less than two, which increases the distance between the nut 33 and the flange 2, making it easier to cut the insert 36 later.

[0028] Specifically, the two flanges 2 are in contact with each other, the screws 31 are welded to the flanges 2 at the matching positions, the ends of the screws 31 away from the flanges 2 are respectively connected to the screws 31, and the nuts 33 and the flanges 2 are respectively in contact with the side walls of the gaskets 34 at the matching positions.

[0029] Specifically, the annular ring 37 is respectively sleeved on one end of the screw 31 passing through the nut 33, and the plug block 36 is respectively connected to the slot 35 of the matching position. One end of the plug block 36 passing through the slot 35 is respectively in contact with the side wall of the adjacent flange 2, and the contact points between the plug block 36 and the flange 2 are welded. The inner diameter of the annular ring 37 is larger than the outer diameter of the nut 33. The annular ring 37 is in contact with the side wall of the nut 33, so that the nut 33 can be limited after the connection is completed to avoid the situation of rotation and thread withdrawal.

[0030] Specifically, a plurality of splines 32 are fixed on the outer wall of the flange 2 near the matching position of the screw 31, and a plurality of key grooves 22 are excavated inside the through-hole 21. The splines 32 are respectively inserted into the inside of the key grooves 22. The length of the splines 32 matches the length of the key grooves 22, and the outer dimensions of the splines 32 match the inner dimensions of the key grooves 22. When vibration occurs, the insertion of the splines 32 and the key grooves 22 reduces the vibration, thereby increasing the stability between adjacent flanges 2.

[0031] Working principle: After passing through the through-hole 21 and the gasket 34, the screw rod 31 is connected with the nut 33 through a basic thread. When the nut 33 is pressed against the gasket 34 and the gasket 34 is pressed against the flange 2, the annular ring 37 is placed on the side of the nut 33 away from the gasket 34, and the plug 36 is aligned with the position of the slot 35 and penetrated therewith until the end of the plug 36 contacts the outer wall of the flange 2, and the end of the plug 36 is welded to the side of the flange 2 by welding, so that the position of the plug 36 cannot be changed. The annular ring 37 can press against the nut 33 from the back, and the plug 36 can form a limit by penetrating the slot 35, and the end point welding is combined. In this way, the nut 33 will not rotate or back out even if it is subjected to large medium vibration, thereby ensuring the tightness of the flange pipe 1 and the flange piece 2 after connection. Since there are two gaskets 34 between the nut 33 and the flange piece 2, the distance between the nut 33 and the flange piece 2 is increased, and the insert block 36 has a certain distance between the nut 33 and the flange piece 2. This distance can be cut and separated by a small cutting device, so that when the nut 33 needs to be removed later, the operation can be carried out as long as it is cut and separated. The removal of the nut 33 is very simple. The above makes the present application have the effect of convenient disassembly on the basis of tight connection.

[0032] The circuits, electronic components and control modules involved are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A fastened aluminum alloy flange, comprising a flange pipe (1), characterized in that: There are two flange pipes (1), and flanges (2) are fixed at one end of the flange pipes (1) close to each other. A plurality of connecting mechanisms (3) are fixed to the side wall of one of the flanges (2). The connecting mechanisms (3) include a screw (31) and an annular ring (37). The outer wall of the screw (31) away from the end of the flange (2) is threadedly connected to a nut (33). A gasket (34) is sleeved on the side of the screw (31) located near the flange (2) of the nut (33). A plurality of slots (35) are bored on the outer wall of the nut (33). One end of the annular ring (37) is fixed with an insert (36) equal in number to the slots (35). The other flange (2) is bored with a through hole (21) at the position of the screw (31).

2. The aluminum alloy flange for fastening connection according to claim 1, characterized in that: The number of the washers (34) on the screw (31) is not less than two.

3. The aluminum alloy flange for fastening connection according to claim 1, characterized in that: The two flanges (2) are in contact with each other, the screws (31) are respectively welded to the flanges (2) at matching positions, one end of the screws (31) away from the flanges (2) is respectively connected to the screws (31), and the nuts (33) and the flanges (2) are respectively in contact with the side walls of the gaskets (34) at matching positions.

4. The aluminum alloy flange for fastening connection according to claim 1, characterized in that: The annular ring (37) is respectively sleeved on one end of the screw (31) passing through the nut (33), and the insert block (36) is respectively connected to the slot (35) at a matching position. One end of the insert block (36) passing through the slot (35) is respectively in contact with the side wall of the adjacent flange (2), and the contact portion between the insert block (36) and the flange (2) is welded.

5. The aluminum alloy flange for fastening connection according to claim 1, characterized in that: The inner diameter of the annular ring (37) is larger than the outer diameter of the nut (33), and the annular ring (37) contacts the adjacent side wall of the nut (33).

6. The aluminum alloy flange for fastening connection according to claim 1, characterized in that: A plurality of splines (32) are fixed on the outer wall of the flange (2) near the matching position of the screw (31), and a plurality of key slots (22) are cut inside the through hole (21). The splines (32) are respectively inserted into the inside of the key slots (22), and the length of the splines (32) matches the length of the key slots (22), and the outer dimensions of the splines (32) match the inner dimensions of the key slots (22).

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