Positioning device for welding pipeline connecting flange plate

Abstract

The utility model discloses a positioning device for welding a pipeline connecting flange plate, which comprises a first positioning clamping support plate and a bolt hole formed in the first positioning clamping support plate, the positioning bolt penetrates through a bolt hole and is welded with the first positioning card supporting plate, one end of the handrail connecting rod piece is welded with the first positioning card supporting plate, and the other end of the handrail connecting rod piece is welded with the second positioning card supporting plate; the welding position is marked on the second positioning card supporting plate; the first positioning clamping supporting plate, the second positioning clamping supporting plate and the handrail connecting rod piece are welded to form an integral frame structure, the integral frame structure is attached to the outer wall of a to-be-connected pipeline through the positioning grooves, and therefore the flange plate is positioned to be located at the correct welding position, pre-alignment of the flange plate before welding is facilitated, and the welding efficiency is improved. And the adjustment frequency in the welding process is reduced, the construction period is further shortened, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model belongs to the technical field of positioning device, more particularly, relate to a kind of positioning device for pipeline connecting flange plate welding. BACKGROUND

[0002] In pipeline engineering, flange plate welding is a common connection method, used to connect two pipelines or pipeline and other equipment, this connection method has the advantages of simple structure, high strength, good sealing, etc., is widely used in petroleum, chemical industry, natural gas and other industrial fields. However, there are problems such as inaccurate positioning and low welding efficiency in the process of flange plate welding, which affects the engineering quality and production efficiency.

[0003] The prior art mainly limits the welding position and perpendicularity of the flange plate through limiting plate, positioning shaft and other structures, which usually adopts two limiting plates, and the two limiting plates are respectively attached to the two end faces of the flange plate to be welded to ensure the accurate welding position of the flange plate, and the positioning shaft further limits the welding position of the flange plate.

[0004] However, the prior art still has some defects, such as: in the welding process, it is affected by various factors, and the error of flange plate welding may be caused by the fault of manual butt joint limiting, which leads to inaccurate butt joint of pipeline in later period; the installation and disassembly process is complicated, which increases the labor intensity and working time of operators, and is more likely to cause the fault of operators. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a positioning device for pipeline connecting flange plate welding, by setting positioning groove, the radius of positioning groove is calculated and measured in advance, to ensure that it is fully compatible with the outer periphery of the pipeline to be connected, so as to achieve very high compatibility, when the positioning card tray is placed on the pipeline, not only the stability of installation is improved, but also the error problem caused by manual positioning is effectively reduced, by introducing positioning groove, the leap from manual positioning to mechanical auxiliary positioning is realized. At the same time, it is also helpful to pre-align the flange plate before welding, reduce the adjustment times in the welding process, further shorten the construction period, and reduce the cost.

[0006] In order to achieve the above object, the utility model discloses a kind of positioning device for pipeline connecting flange plate welding, including first positioning card plate, bolt hole being opened in the first positioning card plate, the positioning bolt being welded across bolt hole and first positioning card plate, second positioning card plate, handrail connecting rod piece being welded one end first positioning card plate and the other end second positioning card plate, welding position and positioning groove being marked on the second positioning card plate (5), the first positioning card plate, second positioning card plate and handrail connecting rod piece are formed integral frame structure by welding, and the integral frame structure is attached to the outer wall of the pipeline to be connected by positioning groove, so that flange plate is positioned and is in correct welding position.

[0007] In an embodiment of the utility model, the positioning groove is arranged at the bottom center position of the first positioning card plate and the second positioning card plate.

[0008] The radius of the positioning groove is perfectly matched with the radius of the pipeline to be fixed.

[0009] In an embodiment of the utility model, a plurality of bolt holes are equidistantly formed on the first positioning card plate.

[0010] The second positioning card plate is marked with welding positions, and the positions of the welding positions correspond one by one with the head positions of the positioning bolts mounted on the first positioning card plate.

[0011] In an embodiment of the utility model, the handrail connecting rod piece is provided with a plurality of rods, and the welding positions of the two ends of each handrail connecting rod piece correspond one by one with the welding positions and the heads of the positioning bolts.

[0012] In an embodiment of the utility model, the handrail connecting rod piece is a threaded steel bar with a diameter of φ18 and a length of 60 cm.

[0013] In an embodiment of the utility model, the surface of the threaded steel bar is further provided with an anti-skid coating layer with a high friction coefficient.

[0014] In an embodiment of the utility model, the front end of the positioning bolt is provided with external threads, and after the flange plate is sleeved on the positioning bolt, a nut is used to fix the flange plate through threaded connection.

[0015] In an embodiment of the utility model, the internal threads of the nut are matched with the external threads of the positioning bolt.

[0016] Overall, compared with the prior art, the above technical scheme conceived by the utility model can achieve the following beneficial effects:

[0017] (1) The positioning device for pipeline connecting flange plate welding of the utility model, through setting the positioning groove, the positioning groove radius is calculated and measured in advance, which ensures its complete adaptation with the outer periphery of the pipeline to be connected, so that the high degree of fit is achieved, when the positioning card tray is placed on the pipeline, not only the stability of installation is improved, but also the error problem possibly caused by manual positioning is effectively reduced, by introducing the positioning groove, the leap from manual positioning to mechanical auxiliary positioning is realized. At the same time, it is also helpful to pre-align the flange plate before welding, which reduces the adjustment times in the welding process, further shortens the construction period and reduces the cost.

[0018] (2) The positioning device for pipeline connecting flange plate welding of the utility model, by setting the positioning bolt, it serves as the supporting point of the flange plate, not only plays a supporting role, but also can accurately fix the flange plate on the predetermined correct position, so that the perfect centering of the flange plate and the pipeline before welding is ensured, and the welding deviation problem caused by inaccurate positioning in the traditional method is effectively avoided. The utility model also welds the handrail connecting rod on the head of the positioning bolt and the second positioning card tray plate, respectively, in the welding operation, the operator can stably hold the handrail, effectively preventing the slight deviation of the flange plate position caused by body shaking or improper operation, and further ensuring the maintenance of centering accuracy.

[0019] (3) The positioning device for pipeline connecting flange plate welding of the utility model adopts economical and practical materials and simple design, ensures that the overall manufacturing cost is low, the structure is relatively simple, avoids complex processing procedures, simplifies the production process, not only speeds up the production speed, but also reduces the requirement for professional skills, is convenient for rapid production and replication in various construction environments, enhances the potential of popular application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the positioning device for pipeline connecting flange plate welding of the utility model embodiment;

[0021] Figure 2 It is a processing schematic view of the positioning card tray of the utility model embodiment;

[0022] Figure 3 It is a finished product structure schematic view of the positioning card tray of the utility model embodiment;

[0023] Figure 4 It is a structure schematic view of the positioning bolt of the utility model embodiment.

[0024] In all the drawings, the same reference signs represent the same technical features, specifically:

[0025] 1-first positioning clamping plate, 2-positioning bolt, 3-bolt hole, 4-handrail connecting rod, 5-second positioning clamping plate, 6-welding position, 7-positioning groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as there is no conflict.

[0027] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), if the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0029] In this patent, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0030] By Figures 1-4It can be known that the utility model discloses a positioning device for pipeline connecting flange plate welding, including first positioning card support plate 1, the bolt hole 3 of being set up on first positioning card support plate 1, the positioning bolt 2 of passing through bolt hole 3 and the welding of first positioning card support plate 1, second positioning card support plate 5, the handrail connecting rod 4 of welding first positioning card support plate 1 one end another end welding second positioning card support plate, the welding position 6 of marking on second positioning card support plate 5 and positioning groove 7. Through the cooperation of positioning bolt 2 and nut, the flange plate is fixed firmly on the positioning device, and then is placed on the pipeline to be welded through positioning groove 7, and the special shape of positioning groove 7 is used to realize perfect adhesion with the surface of the pipeline. After confirming that positioning groove 7 is adhered with the pipeline correctly, the whole device is moved to the predetermined welding position through slight adjustment. In this process, all parts need to be continuously observed and ensured to be in the correct position to avoid deviation in subsequent welding operation. Once the position is determined correctly, welding operation can be started.

[0031] The first positioning card support plate 1 is designed as a semicircular shape, and the arc of the positioning groove at the bottom thereof is adapted to the outer contour of the pipeline to ensure stable support and positioning effect. A positioning groove 7 is formed in the center position of the bottom of the first positioning card support plate 1 with the center as the reference, and the radius of the positioning groove 7 is perfectly adapted to the radius of the pipeline to be fixed, so that accurate centering and limiting of the pipeline are realized. Three bolt holes 3 are equidistantly formed on the first positioning card support plate 1, and the bolt holes 3 are used to place the positioning bolts 2. When the positioning bolts pass through the bolt holes 3, the heads thereof are welded and fixed with the first positioning card support plate 1 by a welding tool, so that the card support plate and the bolts are integrated, and the stability and durability of the whole are greatly enhanced. Figures 1-3 It can be known that the bolt holes 3 are equidistantly arranged on the first positioning card support plate 1.

[0032] It can be known that the bolt holes 3 are equidistantly arranged on the first positioning card support plate 1. Figure 1 And Figure 4 It can be known that the front end of the positioning bolt 2 has external threads. When the flange plate is sleeved on the positioning bolt 2, the nut is used to fix the flange plate through threaded connection. It can be known that the internal threads of the nut are adapted to the external threads of the bolt, and at the same time, the internal threads of the nut are designed according to a specific pitch and a tooth type angle to ensure that they can be seamlessly corresponded to the external threads of the positioning bolt 2. When the nut is rotated and pushed down along the external threads of the positioning bolt 2, the threaded contact surface between the nut and the positioning bolt 2 will be continuously increased, so that the friction force generated by the mutual engagement of the threads ensures that the flange plate can be fixed firmly on the positioning bolt 2.

[0033] It can be known that the bolt holes 3 are equidistantly arranged on the first positioning card support plate 1. Figure 1It can be known that one end of the handrail connecting rod 4 is welded with the head of the positioning bolt 2, and the other end is welded with the preset welding position on the second positioning clamping plate 5. Through the setting of the handrail connecting rod 4, the first positioning clamping plate 1 and the second positioning clamping plate 5 are effectively connected together to form a stable overall frame structure, which not only improves the load-bearing capacity of the structure, but also serves as a reliable reference during the subsequent flange welding process, greatly ensuring the accuracy and precision of the flange welding.

[0034] It can be known that the handrail connecting rod 4 is provided with 3, to ensure the stability and strength of the overall frame structure, and the two ends of each handrail connecting rod 4 are welded with the corresponding welding position 6 and the head of the positioning bolt to realize perfect one-to-one corresponding connection, which not only enhances the overall firmness of the structure, but also enables the overall frame to evenly distribute stress when bearing external force, avoiding local overload.

[0035] Further, the handrail connecting rod 4 is selected to be a threaded steel bar with a diameter of φ18 and a length of 60cm. This specification of threaded steel bar has sufficient strength and stiffness to meet the requirements of the structure on load-bearing capacity. In order to improve the stability and safety of the welding process, a non-slip coating can be optionally provided on the surface of the threaded steel bar. The main consideration is that during the welding process, due to the smooth surface of the pipeline, the positioning device may displace due to insufficient friction, thereby affecting the accuracy and precision of the welding. The setting of the non-slip coating can effectively increase the friction between the threaded steel bar and the surface of the pipeline, prevent the positioning device from sliding or shifting during the welding process, and further ensure the reliability and stability of the welding.

[0036] By Figure 2 It can be known that the size of the second positioning clamping plate 5 is consistent with that of the first positioning clamping plate 1, ensuring that they can perfectly match during installation and use. On the second positioning clamping plate 5, there are special marks indicating the welding positions 6, which correspond one-to-one with the positions of the heads of the positioning bolts 2 installed on the first positioning clamping plate 1, greatly facilitating the welding work of the handrail connecting rod 4, making the welding process more accurate and efficient, and reducing the possibility of errors and rework.

[0037] Furthermore, positioning grooves 7 are provided on both the first positioning clamping plate 1 and the second positioning clamping plate 5. The main function of these positioning grooves 7 is to stably place the positioning device on the pipeline, ensuring that the positioning device and the pipeline can be tightly fitted, thereby enhancing the stability and reliability of the overall structure.

[0038] In order to further improve the fitting degree and stability between the positioning device and the pipeline, a non-slip structure that increases friction can be optionally provided on the arc-shaped area where the positioning groove 7 contacts the pipeline.

[0039] Further, the anti-skid structure is that a layer of anti-skid coating with high friction coefficient is coated on the inner wall of the positioning groove 7 or the contact part of the positioning groove 7 is made of a material with rough surface. Through these measures, the sliding or displacement of the positioning device on the pipeline can be effectively prevented, and the stability and safety of the whole structure are ensured.

[0040] In another embodiment of the present application, a construction method for the positioning device for pipeline flange welding is provided, which comprises the following steps:

[0041] S100: Preparation work:

[0042] Material preparation: prepare flange, pipeline, flange pipeline connector, welding equipment, welding material, protective gas, etc.

[0043] Tool preparation: prepare cutting tools, grinding tools, measuring tools, wrenches, etc.

[0044] Environment preparation: ensure that the welding environment is clean, dry, well-ventilated, and meets safety requirements.

[0045] S200: Pipeline centering: clamp the flange pipeline connector on the pipeline to ensure that the connector is concentric with the pipeline, and accurately center the flange and the pipeline.

[0046] S300: Spot welding: use welding equipment to perform peripheral spot welding between the flange and the pipeline to fix the position of the flange. The number of spot welds is determined according to the size of the flange and the material of the pipeline, generally 2-4 points per side.

[0047] S400: Remove the connector: loosen the positioning bolts and remove the flange pipeline connector from the flange.

[0048] S500: Full welding: use welding equipment to perform full welding on the flange and the pipeline to ensure welding quality. The welding sequence and method are determined according to the size of the flange and the material of the pipeline.

[0049] S600: Inspection: check the welding quality to ensure that there are no cracks, pores, slag inclusions, etc. in the weld, and check the connection state of the flange and the pipeline to ensure that the connection is firm and reliable.

[0050] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning device for welding pipeline connection flanges, characterized in that: The invention comprises a first positioning card support plate (1), a bolt hole (3) provided on the first positioning card support plate (1), a positioning bolt (2) passing through the bolt hole (3) and welded to the first positioning card support plate (1), a second positioning card support plate (5), a handrail connecting rod (4) with one end welded to the first positioning card support plate (1) and the other end welded to the second positioning card support plate (5), a welding position (6) and a positioning groove (7) marked on the second positioning card support plate (5), the first positioning card support plate (1), the second positioning card support plate (5) and the handrail connecting rod (4) are welded to form an overall frame structure, and the overall frame structure is fitted to the outer wall of the pipe to be connected through the positioning groove (7), thereby positioning the flange so that it is in the correct welding position.

2. The positioning device for welding pipeline connection flanges according to claim 1, characterized in that: The positioning groove (7) is provided at the bottom center of the first positioning card support plate (1) and the second positioning card support plate (5); The radius of the positioning groove (7) is perfectly matched to the radius of the pipe to be fixed.

3. The positioning device for welding pipeline connection flanges according to claim 2, characterized in that: The first positioning card support plate (1) is provided with a plurality of bolt holes (3) at equal intervals; The second positioning card support plate (5) is marked with welding positions (6), and the positions of these welding positions (6) correspond one-to-one to the positions of the heads of the positioning bolts (2) installed on the first positioning card support plate (1).

4. The positioning device for welding pipeline connection flanges according to claim 1, characterized in that: A plurality of handrail connecting rods (4) are provided, and the welding positions at both ends of each handrail connecting rod (4) are welded to the corresponding welding positions (6) and the heads of the positioning bolts in a one-to-one correspondence.

5. The positioning device for welding pipeline connection flanges according to claim 4, characterized in that: The handrail connecting rod (4) is a threaded steel bar with a diameter of φ18 and a length of 60 cm.

6. The positioning device for welding pipeline connection flanges according to claim 5, characterized in that: The surface of the threaded steel bar is also provided with an anti-slip coating with a high friction coefficient.

7. The positioning device for welding pipeline connection flanges according to any one of claims 1 to 6, characterized in that: The front end of the positioning bolt (2) is provided with an external thread. When the flange is sleeved on the positioning bolt (2), a nut is used to fix the flange through threaded connection.

8. The positioning device for welding pipeline connection flanges according to claim 7, characterized in that: The internal thread of the nut is adapted to the external thread of the positioning bolt (2).

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