Carbon steel flange resistant to low temperature and easy to install

Abstract

The utility model discloses a low-temperature-resistant easy-to-install carbon steel flange, which relates to the technical field of flanges and comprises two flange pipes, flange plates are arranged at the ends, close to each other, of the flange pipes, a screw rod penetrates through a through hole and then is in threaded connection with a nut to complete basic connection, and after a limiting sleeve is arranged at the end of the screw rod in a sleeving manner, the limiting sleeve is in threaded connection with the nut. The two ends of the bottom of the U-shaped strip penetrate through the through holes in the positions of one sides of the limiting sleeves correspondingly, then the bending points, penetrating through the through holes, of the U-shaped strip are bent through a wire cutter, the limiting sleeves are limited through traction of the U-shaped strip, so that the positions of the limiting sleeves are kept unchanged, and when vibration is transmitted to the nut and rotating unscrewing is about to be conducted, the U-shaped strip is fixed. When the two flange plates are spliced, the two flange plates can be blocked by the limiting sleeve with the position kept unchanged, so that the limiting sleeve cannot rotate to generate thread withdrawing motion, the stability of the two flange plates after splicing is kept, the connection mode is simple in operation, meanwhile, excessive parts are not needed, and the technical effect of high stability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a carbon steel flange which is resistant to low temperatures and easy to install. Background Art

[0002] Low-temperature resistant carbon steel flange is a pipe connector with excellent performance in low-temperature environments. It is made of high-quality materials, has various types, and has outstanding characteristics. It is widely used in various low-temperature piping systems. When selecting low-temperature resistant carbon steel flanges, you should choose according to the specific use conditions and requirements, and pay attention to the product's material, standards, quality, etc.

[0003] Due to the impact of the medium flowing in the pipeline, vibration will occur in the connection, and the connection is completed by the combination of screws and nuts. The vibration will cause the nut to squeeze the connection and cause the thread to retreat after vibration. In order to avoid the unstable connection after the thread retreat caused by vibration, many anti-thread retreat structures are used to prevent the nut from rotating in traditional technologies. However, the anti-thread retreat structure is complicated to operate, and there are a large number of screws. Sometimes even welding equipment is needed, which makes the installation steps of the entire flange too cumbersome and not conducive to the rapid completion of the installation work. Utility Model Content

[0004] The main purpose of the utility model is to provide a low-temperature resistant and easy-to-install carbon steel flange, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A carbon steel flange that is resistant to low temperatures and easy to install includes two flange pipes. A flange plate is provided at one end of the flange pipe that is close to each other. The flange plates are provided with through holes at matching positions. A screw is inserted through the two matching through holes. The screw passes through the outer walls of the two through holes and is threadedly connected to a nut. A limiting sleeve is provided on the outer wall of one end of the screw that passes through the nut. Sleeve ear blocks are fixed at both ends of the outer wall of the limiting sleeve. Through holes are drilled on the sleeve ear blocks. U-shaped strips are provided at both ends above the screw.

[0007] Preferably, both ends of the bottom of the U-shaped strip are connected to through holes that match the positions.

[0008] Preferably, one end of the U-shaped strip passing through the through hole is provided with a bending point.

[0009] Preferably, the flanges are provided with transverse grooves at the positions of the U-shaped bars, and the U-shaped bars are respectively embedded in the transverse grooves.

[0010] Preferably, the inner diameter of the limiting sleeve matches the outer diameter of the screw.

[0011] Preferably, the limiting sleeves are in contact with one end of the nut that is close to the nut.

[0012] Preferably, the U-shaped bars are all made of aluminum alloy.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] After the screw passes through the through hole, it is threadedly connected to the nut to complete the basic connection. After the limiting sleeve is sleeved on the end of the screw, the two ends of the bottom of the U-shaped bar respectively pass through the through holes on one side of the limiting sleeve. Then use wire cutters to bend the bending point of the U-shaped bar passing through the through hole. The limiting sleeve is limited by the traction of the U-shaped bar, so that the position of the limiting sleeve remains unchanged. When the vibration is transmitted to the nut and is about to rotate to withdraw the wire, it will be blocked by the limiting sleeve that remains in position, so that it cannot produce the wire withdrawal movement by rotation, thereby maintaining the stability of the two flanges after splicing. This connection method is not only simple to operate, but also does not require the use of too many components, thereby achieving a technical effect with strong stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a low-temperature-resistant and easy-to-install carbon steel flange of the utility model;

[0016] Figure 2 This is a schematic diagram of the separation structure of the screw and the limiting sleeve of a low-temperature-resistant and easy-to-install carbon steel flange of the utility model;

[0017] Figure 3 This is a structural diagram of a low-temperature-resistant and easy-to-install carbon steel flange of the present invention when a U-shaped strip is about to be inserted into a through hole;

[0018] Figure 4 This is an enlarged structural diagram of point A of a low-temperature-resistant and easy-to-install carbon steel flange of the present invention.

[0019] In the figure: 1. Flange pipe; 2. Flange plate; 21. Through hole; 22. Horizontal groove; 3. Screw; 4. Nut; 5. Limiting sleeve; 6. Sleeve ear block; 7. Through hole; 8. U-shaped strip; 9. Bending point. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-4As shown, a low-temperature resistant and easy-to-install carbon steel flange includes a flange pipe 1. There are two flange pipes 1. A flange plate 2 is provided at the adjacent ends of the flange pipes 1. A through-hole 21 is drilled at the matching position of the flange plate 2. A screw 3 is inserted through the two matching through-holes 21. The screw 3 passes through the outer walls of the two through-holes 21 and is threadedly connected to a nut 4. A limiting sleeve 5 is sleeved on the outer wall of one end of the screw 3 passing through the nut 4. Sleeve ear blocks 6 are fixed at both ends of the outer wall of the limiting sleeve 5. Through holes 7 are drilled on the sleeve ear blocks 6. U-shaped bars 8 are provided at both ends above the screw 3.

[0022] Specifically, both ends of the bottom of the U-shaped bar 8 are connected to the through holes 7 with matching positions, and a bending point 9 is provided at one end of the U-shaped bar 8 passing through the through hole 7, so that the U-shaped bar 8 will not be pulled out of the through hole 7.

[0023] Specifically, transverse grooves 22 are bored at the positions of the flanges 2 located at the U-shaped bars 8 , and the U-shaped bars 8 are respectively embedded in the transverse grooves 22 to increase the stability of the U-shaped bars 8 .

[0024] Specifically, the inner diameter of the limiting sleeve 5 matches the outer diameter of the screw 3 to avoid shaking due to size difference.

[0025] Specifically, the limiting sleeve 5 is in contact with the end of the nut 4 that is close to it, and can play a blocking role thereon.

[0026] Specifically, the U-shaped bars 8 are made of aluminum alloy and have a certain hardness after being bent, which can play a good limiting effect on the limiting sleeve 5.

[0027] Working principle:

[0028] After the screw rod 3 passes through the through hole 21, it is threadedly connected with the nut 4 to complete the basic connection. After the limiting sleeve 5 is sleeved on the end of the screw rod 3, the two ends of the bottom of the U-shaped bar 8 respectively pass through the through holes 7 on one side of the limiting sleeve 5, and then use wire cutters to bend the U-shaped bar 8 at the bending point 9 through the through hole 7. Due to the traction limit of the U-shaped bar 8, the position of the limiting sleeve 5 remains unchanged. When the vibration is transmitted to the nut 4 and is about to be rotated to withdraw the wire, it will be blocked by the limiting sleeve 5 that remains in position, so that it cannot produce the wire withdrawal movement by rotation, thereby maintaining the stability between the two flanges 2 after splicing. This connection method is not only simple to operate, but also does not require the use of too many components, thereby achieving a technical effect with strong stability.

[0029] 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.

[0030] 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 low-temperature resistant and easy-to-install carbon steel flange, comprising a flange pipe (1), characterized in that: There are two flange pipes (1), and the adjacent ends of the flange pipes (1) are each provided with a flange plate (2). The matching positions of the flange plates (2) are each provided with a through hole (21). A screw rod (3) is inserted through the two matching through holes (21). The screw rod (3) is threadedly connected to a nut (4) at the outer wall of each through hole (21). The outer wall of one end of the screw rod (3) passing through the nut (4) is sleeved with a limiting sleeve (5). Both ends of the outer wall of the limiting sleeve (5) are fixed with a sleeve ear block (6), and the sleeve ear block (6) is provided with a through hole (7). The upper ends of the screw rod (3) are provided with a U-shaped strip (8).

2. The low-temperature-resistant and easy-to-install carbon steel flange according to claim 1, characterized in that: The two ends of the bottom of the U-shaped strip (8) are respectively connected to the through holes (7) with matching positions.

3. The low-temperature-resistant and easy-to-install carbon steel flange according to claim 1, characterized in that: One end of the U-shaped strip (8) passing through the through hole (7) is provided with a bending point (9).

4. The low-temperature-resistant and easy-to-install carbon steel flange according to claim 1, characterized in that: The flanges (2) are each provided with transverse grooves (22) at positions on the U-shaped bars (8), and the U-shaped bars (8) are each embedded in the interior of the transverse grooves (22).

5. The low-temperature-resistant and easy-to-install carbon steel flange according to claim 1, characterized in that: The inner diameter of the limiting sleeve (5) matches the outer diameter of the screw (3).

6. The low-temperature-resistant and easy-to-install carbon steel flange according to claim 1, characterized in that: The limiting sleeves (5) are respectively in contact with one end of the nut (4) that is close to the other end.

7. The low-temperature-resistant and easy-to-install carbon steel flange according to claim 1, characterized in that: The U-shaped bars (8) are all made of aluminum alloy.

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