Auxiliary device for flat welding flange installation

Abstract

The utility model relates to an auxiliary device for installing a flat welding flange, which comprises a main body frame, the main body frame is a regular polygon frame body, the diameter of a circumcircle of the main body frame is larger than the inner diameter of a sealing surface of the flat welding flange, and at least two limiters are arranged on the bottom surface of the main body frame; the limiting stopper is columnar, the upper end of the limiting stopper is connected with the bottom surface of the main body frame, the lower end of the limiting stopper is suspended, and the limiting stopper corresponds to a bolt hole of the flat welding flange in position and size, so that the limiting stopper can be movably inserted into the bolt hole of the flat welding flange; the diameter of the circumcircle of the reference block is smaller than the inner diameter of the flat welding flange and larger than the inner diameter of the pipeline, and the thickness of the reference block is equal to the effective distance between the sealing surface of the flat welding flange and the port of the pipeline; the reference block is centrally arranged on the bottom surface of the main body frame, and the end part of the reference block is connected with the bottom surface of the main body frame. Therefore, the positioning of the flat welding flange and the pipeline can be quickly and accurately completed, and the construction efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tool structure, especially a tool structure suitable for flat welding flange installation, in particular to an auxiliary device for flat welding flange installation. BACKGROUND

[0002] Flat welding flange is commonly used for the connection of conveying pipeline in petroleum, natural gas, chemical industry and other industries, in the daily construction process, the installation of flat welding flange needs to ensure that the central axis of the flange and the central axis of the pipeline are in a straight line, ensure the concentricity of the flange and the pipeline, the sealing surface of the flange should be perpendicular to the central axis of the pipeline, and the distance between the pipeline end and the sealing surface of the flange (generally 1.5 times of the thickness of the pipeline wall) needs to be controlled. The usual method is: first, the flange is sleeved into the pipe end, and the effective distance between the sealing surface of the flange and the pipe end is reserved. Then, spot welding is carried out on either side of the pipeline, and the opposite side is aligned with the sealing surface of the flange as the reference. After alignment, spot welding is carried out at the alignment position. Then, rotate 90°, and align again, and spot welding is carried out on both sides. This construction method often needs 2-3 people to cooperate, which is high in labor cost and low in efficiency, and is not suitable for batch efficient construction. Moreover, the installation precision is low, which greatly affects the strength and tightness of the pipeline connection and the inclination of the whole pipeline, and is not conducive to the control of engineering quality.

[0003] Therefore, it needs to be improved in order to better meet the construction requirements. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the problems existing in the current flat welding flange installation construction, provides an auxiliary device for flat welding flange installation, which can quickly and accurately complete the positioning of flat welding flange and pipeline, and can facilitate the welding operation of flat welding flange and pipeline, effectively improve the construction quality and efficiency. Moreover, the number of construction personnel can be reduced, and the production cost can be reduced.

[0005] The technical scheme of the utility model is:

[0006] An auxiliary device for flat welding flange installation, comprising a main body frame, the main body frame is a regular polygon frame, the diameter of its circumscribed circle is greater than the inner diameter of the sealing surface of the flat welding flange, and at least two limiters are arranged on the bottom surface thereof; the limiter is columnar, the upper end thereof is connected with the bottom surface of the main body frame, and the lower end thereof is suspended, and the position and size thereof correspond to the bolt hole of the flat welding flange, so that the limiter can be inserted into the bolt hole of the flat welding flange and the main body frame is located at the central position of the flat welding flange; further comprising a reference block, which is a regular cross-shaped, the diameter of its circumscribed circle is smaller than the inner diameter of the flat welding flange and greater than the inner diameter of the pipeline, and the thickness thereof is equal to the effective distance between the sealing surface of the flat welding flange and the port of the pipeline; the reference block is arranged on the bottom surface of the main body frame in the middle, and the end portion thereof is connected with the bottom surface of the main body frame.

[0007] Further, the main body frame is a square; the limiters are four, which are arranged on the four corners of the main body frame respectively; the end portion of the reference block is connected with the frame of the main body frame.

[0008] Further, the end portion of the reference block is located at the central position of the frame of the main body frame.

[0009] Further, the cross section of the limiter is rectangular, the length thereof is greater than the depth of the bolt hole of the flat welding flange, and the lower end thereof is provided with a limiting hole in the shape of a through hole, a positioning pin can be inserted into the limiting hole to stably connect the main body frame with the flat welding flange.

[0010] Further, the limiter is perpendicular to the bottom surface of the main body frame.

[0011] Further, the limiting hole is a vertical waist-shaped hole; the positioning pin is wedge-shaped, and when the positioning pin is inserted into the limiting hole, the upper end of the positioning pin abuts against the bottom surface of the flat welding flange.

[0012] The utility model discloses the beneficial effect:

[0013] The utility model discloses reasonable in design, simple structure, convenient to use, can stably connect the main body frame with the flat welding flange, then install it on the pipeline port, make the bottom surface of reference block press in the pipeline port, thereby, can complete the positioning of flat welding flange and pipeline fast and accurately, and facilitate subsequent welding operation. ACCURACY

[0014] Figure 1 It is the structure schematic diagram of the utility model.

[0015] Figure 2 It is the utility model use state schematic Figure 1 .

[0016] Figure 3 is the use state diagram of the present application Figure 2 .

[0017] Wherein, 1 - main body frame; 2 - datum block; 3 - limit stop; 4 - positioning pin; 5 - flat welding flange; 6 - bolt hole; 7 - pipeline. DETAILED DESCRIPTION

[0018] The present application will be further described below in conjunction with the drawings and examples.

[0019] As Figures 1 to 3 indicated.

[0020] A kind of auxiliary device for flat welding flange installation, including main body frame 1, limit stop 3 and datum block 2 etc.

[0021] The main body frame 1 is square frame body, the diameter of its circumscribed circle is greater than the inner diameter of the sealing surface of flat welding flange 5, can ensure that its four corners lap on the sealing surface of the flat welding flange 5. The main body frame can also be other regular polygon, or circular ring.

[0022] The limit stop 3 is flat column, its cross section is rectangle, vertically arranged below the main body frame 1, its upper end is connected with the bottom surface of the main body frame 1, and its lower end is suspended. The limit stop 3 is four, respectively arranged on the four corners of the main body frame 1, and corresponds to the bolt hole 6 of the flat welding flange 5. At the same time, the width of the limit stop 3 is less than the hole diameter of the bolt hole 6 of the flat welding flange 5, and the length is greater than the depth of the bolt hole 6, so that it can be inserted into the bolt hole 6 of the flat welding flange 5, and the lower end extends out of the bolt hole 6 of the flat welding flange 5. At the same time, the lower end of the limit stop 3 is provided with a through-hole shaped limiting hole. The limiting hole is a vertical waist-shaped hole, a wedge-shaped positioning pin 4 can be inserted into the limiting hole, and the upper end of the positioning pin 4 abuts against the bottom surface of the flat welding flange 5, so that the main body frame 1 and the flat welding flange 5 are stably connected.

[0023] The datum block 2 is a positive cross shape, the diameter of its circumscribed circle is less than the inner diameter of the flat welding flange 5 and greater than the inner diameter of the pipeline 7, and the thickness is equal to the effective distance between the sealing surface of the flat welding flange 5 and the port of the pipeline 7. The datum block 2 is centrally arranged on the bottom surface of the main body frame 1, and the end is connected with the midpoint of the frame of the main body frame 1, so that the datum block protrudes out of the main body frame.

[0024] The use method of the utility model is: the each stopper on the main body frame is aligned and inserted into the corresponding bolt hole of the flat welding flange at the same time, the main body frame is placed on the sealing surface of the flat welding flange, and the reference block is located in the flat welding flange at the same time. Then, the positioning pin is inserted into the limiting hole of the stopper, and the rear end of the positioning pin abuts against the bottom surface of the flat welding flange, so that the sealing surface of the flat welding flange is tightly combined with the main body frame. Subsequently, the flat welding flange is sleeved on the pipeline port, and the bottom surface of the reference block abuts against the port of the pipeline. In this way, the distance between the sealing surface of the flat welding flange and the pipeline port can be ensured to be an effective distance, and the positioning of the flat welding flange is realized. Finally, the flat welding flange can be spot-welded and reinforced, and the installation work of the flat welding flange is completed.

[0025] The utility model can quickly and accurately complete the positioning of the flat welding flange and the pipeline, improve the construction efficiency and quality.

[0026] The parts not involved in the utility model are the same as the prior art or can be realized by using the prior art.

Claims

1. An auxiliary device for use in the installation of a flat face flange, comprising a main frame, characterised in that, The main body frame is a regular polygon frame, the diameter of its circumscribed circle is greater than the inner diameter of the sealing surface of the flat welding flange, and at least two limiters are arranged on the bottom surface of the main body frame; the limiter is columnar, the upper end of which is connected with the bottom surface of the main body frame, and the lower end thereof is suspended, the position and size of the limiter correspond to the bolt hole of the flat welding flange, the limiter can be inserted into the bolt hole of the flat welding flange and the main body frame is located at the central position of the flat welding flange; further comprising a reference block which is a regular cross-shaped, the diameter of the circumscribed circle of the reference block is smaller than the inner diameter of the flat welding flange and greater than the inner diameter of the pipeline, and the thickness of the reference block is equal to the effective distance between the sealing surface of the flat welding flange and the port of the pipeline; the reference block is arranged on the bottom surface of the main body frame in the central position, and the end of the reference block is connected with the bottom surface of the main body frame.

2. The device for assisting in the installation of a flat face flange according to claim 1, wherein, The main body frame is a square; the limiters are four, which are arranged on the four corners of the main body frame; the end of the reference block is connected with the frame of the main body frame.

3. The device for assisting in the installation of a fillet welded flange according to claim 2, wherein, The end of the reference block is located at the central position of the frame of the main body frame.

4. The device for assisting in the installation of a fillet welded flange according to claim 1, wherein, The cross section of the limiter is rectangular, the length of which is greater than the depth of the bolt hole of the flat welding flange, and the lower end of the limiter is provided with a limiting hole in the form of a through hole, a positioning pin can be inserted into the limiting hole to stably connect the main body frame and the flat welding flange.

5. The device for assisting in the installation of a fillet welded flange according to claim 1, wherein, The limiter is perpendicular to the bottom surface of the main body frame.

6. The device for assisting in the installation of a fillet welded flange according to claim 4, wherein, The limiting hole is a vertical waist-shaped hole; the positioning pin is wedge-shaped, and when the positioning pin is inserted into the limiting hole, the upper end of the positioning pin abuts against the bottom surface of the flat welding flange.

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