External preheating mouthpiece

Abstract

The utility model provides a preheating external mouthpiece. The preheating external mouth device is used for preheating the welding position of a pipeline and comprises a first fixing piece, a second fixing piece, a fastening assembly and a heating assembly. The first fixing piece is constructed to be a semicircle attached to the outer wall of the pipeline. The second fixing piece is constructed to be a semicircle attached to the outer wall of the pipeline and is hinged to the first fixing piece. The multiple fastening assemblies are symmetrically distributed on the first fixing piece and the second fixing piece at equal intervals and abut against the outer wall of the pipeline. The heating assembly is arranged on the first fixing piece and the second fixing piece. The preheating external mouth device can center and fix a metal pipeline and uniformly heat a welding seam, the phenomenon of welding stress concentration is reduced, and the welding quality of the pipeline is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline laying construction equipment, and in particular to a preheating external outlet device. Background Technology

[0002] During the construction of metal pipelines, multiple pipe sections need to be welded together for fixation. As the pipe size increases, the length of the weld also increases, and the required welding time also increases. The temperature difference at different locations of the pipe joint also increases, which can easily lead to stress concentration during welding, thus affecting the load-bearing capacity and service life of the pipe connection.

[0003] To minimize the impact of welding stress on pipeline quality, construction workers typically preheat the pipe joints to reduce stress concentration caused by temperature differences. Currently, the industry commonly uses gaseous fuel combustion as a heat source, employing a spray gun to heat the pipeline. However, this heating method requires fuel storage equipment on-site, posing certain safety risks. Furthermore, the heating effect of the spray gun is not uniform, the temperature at the welding position is difficult to control, and there are some inconveniences in operation. Utility Model Content

[0004] In view of this, the present invention aims to provide a preheating external nozzle that can align and fix metal pipes and uniformly heat the weld, which helps to reduce the phenomenon of welding stress concentration and improve the quality of pipe welding.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A preheating outlet includes a first fixing member configured as a semicircle to fit against the outer wall of a pipe;

[0007] The second fastener is constructed as a semicircle that fits against the outer wall of the pipe and is hinged to the first fastener.

[0008] The fastening components are configured to be equidistantly and symmetrically distributed on the first and second fasteners, and abut against the outer wall of the pipe;

[0009] A heating assembly is disposed on the first fixing member and the second fixing member.

[0010] Furthermore, both the first and second fixing members include two semi-rings arranged parallel to each other, and the fastening assembly is fixedly disposed between the two semi-rings of the first and second fixing members.

[0011] Furthermore, the fastening assembly includes a connecting block, which is vertically fixedly connected between two mutually parallel semi-rings of the first or second fastener;

[0012] The screw passes through the connecting block along the diameter of the semi-ring and is threaded into the connecting block.

[0013] Furthermore, the screws are configured as two that are symmetrically distributed about the connecting block.

[0014] Furthermore, a clearance notch is provided on the inner side of the connecting block; the clearance notch is arranged to pass through the circumference of the first fixing member or the second fixing member.

[0015] Furthermore, the heating assembly includes a fixing bracket that fits into the inner ring of the first fixing member or the second fixing member;

[0016] The induction cable is threaded through the fixed frame.

[0017] Furthermore, the fixing bracket is detachably mounted on the inner ring of the first fixing member or the second fixing member.

[0018] Furthermore, anti-collision wheels are fitted at both ends of the hinge shaft of the first and second fixing members, and the anti-collision wheels are rotatably mounted on the hinge shaft.

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] This invention discloses a preheating external nozzle, which comprises a first fixing member, a second fixing member, a fastening assembly, and a heating assembly. The first and second fixing members are fitted and fixed to the outer wall of the pipe by the fastening assembly. The fastening assembly abuts against the outer wall of the pipe, providing support and ensuring alignment during welding. The heating assembly, installed on the first and second fixing members, provides uniform heating to the welded area via inductive heating, reducing stress concentration and improving weld quality.

[0021] Secondly, by constructing the first and second fixing members as a structure consisting of two parallel semi-rings, the contact area between the first and second fixing members and the outer wall of the pipe can be increased, thereby improving the overall stability of the equipment. The fastening assembly connects the two parallel semi-rings that make up the first or second fixing member into a fixed whole. By setting the fastening assembly as a connecting block and a screw, one end of the screw abuts against the outer wall of the pipe, achieving pipe fixation and alignment. By creating a clearance notch on the connecting block, the welding torch can be moved aside during welding, facilitating the welding process.

[0022] Furthermore, by configuring the heating element as a bracket and induction cable structure, the bracket supports the induction cable, which, when connected to a high-frequency power source, heats the pipe through inductive effect. The bracket is detachably mounted on the first or second fastener via bolts, facilitating the inspection and replacement of the heating element.

[0023] In addition, by setting anti-collision wheels on the hinge shaft of the first fastener and the second fastener, a buffering effect can be achieved during the installation of the first fastener and the second fastener onto the pipe, preventing the first fastener and the second fastener from directly colliding with the pipe. Attached Figure Description

[0024] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a preheating external outlet in an embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the fastening assembly in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the heating component in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. First fastener; 2. Second fastener; 3. Fastening assembly; 301. Connecting block; 302. Screw; 303. Clearance notch; 4. Heating assembly; 401. Fixing frame; 402. Induction cable; 5. Anti-collision wheel. Detailed Implementation

[0030] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0031] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Taking a preheating outlet device described in this utility model as an example, the directional terms used in the embodiments, such as "up," "down," "left," "right," "front," and "back," are defined based on the vertical direction (also known as the height direction or the Z-direction), horizontal direction (also known as the width direction or the Y-direction), and front-back direction (also known as the length direction or the X-direction) of the preheating outlet device. "Inner" and "outer" are defined based on the outline of the corresponding component. For example, "inner" and "outer" are defined based on the outline of the preheating outlet device; the side of the preheating outlet device outline closer to the center of the device is considered "inner," and vice versa.

[0033] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances. The utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] The following will refer to the appendix. Figure 1 To be continued Figure 3 The present invention will be described in detail with reference to the embodiments.

[0035] This embodiment relates to a preheating external outlet device, which adopts a method of centering fixation and inductive heating. It can center and fix the metal pipe and heat the weld evenly, which helps to reduce the phenomenon of welding stress concentration and improve the welding quality of the pipe.

[0036] In terms of overall structure, refer to Figure 1This embodiment of a preheating external outlet includes a first fixing member 1, a second fixing member 2, a fastening assembly 3, and a heating assembly 4. The first fixing member 1 and the second fixing member 2 are both semi-circular structures that adhere to the outer wall of the pipe to be welded. The first fixing member 1 and the second fixing member 2 together form a ring-shaped structure that adheres to the outer wall of the pipe. The first fixing member 1 and the second fixing member 2 are hinged together. The fastening assembly 3 is disposed on the first fixing member 1 and the second fixing member 2. The fastening assembly 3 abuts against the outer wall of the pipe. The heating assembly 4 is mounted on the first fixing member 1 and the second fixing member 2.

[0037] As described above, the preheating external outlet is configured with a first fixing member 1, a second fixing member 2, a fastening assembly 3, and a heating assembly 4. The first fixing member 1 and the second fixing member 2 are fitted and fixed to the outer wall of the pipe by the fastening assembly 3. The fastening assembly 3 abuts against the outer wall of the pipe, providing support and ensuring alignment during welding. The heating assembly 4, installed on the first fixing member 1 and the second fixing member 2, provides uniform heating to the welded area via inductive heating, reducing stress concentration and improving weld quality.

[0038] Reference Figure 1 and Figure 2 The first fixing member 1 and the second fixing member 2 are each composed of two parallel semi-rings. A fastening assembly 3 is fixedly installed between the two parallel semi-rings of the first fixing member 1 and the second fixing member 2. The fastening assembly 3 includes a connecting block 301 and a screw 302. The connecting block 301 is fixedly connected to the two parallel semi-rings of the first fixing member 1 or the second fixing member 2 by welding. The screw 302 passes through the connecting block 301 along the radial direction of the first fixing member 1 or the second fixing member 2. The screw 302 is threaded into the connecting block 301. One end of the screw 302 abuts against the outer wall of the pipe. Each connecting block 301 has two screws 302. The two screws 302 are parallel to each other. The two screws 302 abut against the outer walls of the two sections of pipe to be welded. A clearance notch 303 is provided on the inner side of the connecting block 301. The clearance notch 303 is circumferentially arranged around the first fixing member 1 or the second fixing member 2.

[0039] By constructing the first fixing member 1 and the second fixing member 2 as a structure consisting of two parallel semi-rings, the contact area between the first fixing member 1, the second fixing member 2, and the outer wall of the pipe can be increased, thereby improving the overall stability of the equipment. The fastening assembly 3 connects the two parallel semi-rings that make up the first fixing member 1 or the second fixing member 2 into a fixed whole. By setting the fastening assembly 3 as a structure of a connecting block 301 and a screw 302, one end of the screw 302 abuts against the outer wall of the pipe, achieving pipe fixation and alignment. By providing a clearance notch 303 on the connecting block 301, clearance can be provided for the welding torch during welding, facilitating the welding process.

[0040] Reference Figure 1 and Figure 3 The heating assembly 4 includes a mounting bracket 401 and an induction cable 402. The mounting bracket 401 is fitted into the inner ring of either the first fixing member 1 or the second fixing member 2. The induction cable 402 passes through the mounting bracket 401. The mounting bracket 401 is detachably mounted on the first fixing member 1 or the second fixing member 2 by multiple fastening bolts. Connectors are provided at both ends of the induction cable 402. When the induction cable 402 is connected to a high-frequency power supply, it can heat the wound metal conductor through inductive effect.

[0041] By configuring the heating component 4 as a structure consisting of a mounting bracket 401 and an induction cable 402, the mounting bracket 401 provides support for the induction cable 402. After the induction cable 402 is connected to a high-frequency power supply, it can heat the pipe through inductive effect. The mounting bracket 401 is detachably mounted on the first or second fastener via bolts, facilitating the inspection and replacement of the heating component 4.

[0042] Reference Figure 1 Anti-collision wheels 5 are fitted on both ends of the hinge shaft of the first fastener and the second fastener, and the anti-collision wheels 5 are rotatably mounted on the hinge shaft.

[0043] By setting anti-collision wheels 5 on the hinge shaft of the first fastener and the second fastener, a buffering effect can be achieved during the installation of the first fastener 1 and the second fastener 2 onto the pipe, preventing the first fastener 1 and the second fastener 2 from directly colliding with the pipe.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A preheating external nozzle for preheating the welding position of a pipe, characterized in that: Including the first fastener (1), which is configured as a semicircle to fit against the outer wall of the pipe; The second fastener (2) is constructed as a semicircle that fits against the outer wall of the pipe and is hinged to the first fastener (1). The fastening components (3) are configured to be equidistantly and symmetrically distributed on the first fastener (1) and the second fastener (2), and abut against the outer wall of the pipe; Heating component (4) is disposed on the first fixing member (1) and the second fixing member (2).

2. A preheating external outlet device according to claim 1, characterized in that: Both the first fixing member (1) and the second fixing member (2) include two semi-rings arranged parallel to each other, and the fastening assembly (3) is fixedly disposed between the two semi-rings of the first fixing member (1) and the second fixing member (2).

3. A preheating external outlet device according to claim 2, characterized in that: The fastening assembly (3) includes a connecting block (301), which is vertically fixedly connected between two mutually parallel semi-rings of the first fastener (1) or the second fastener (2); The screw (302) passes through the connecting block (301) along the diameter direction of the semi-ring and is threadedly engaged with the connecting block (301).

4. A preheating outlet device according to claim 3, characterized in that: The screws (302) are configured as two that are symmetrically distributed about the connecting blocks (301).

5. A preheating external outlet device according to claim 3, characterized in that: The connecting block (301) has a clearance notch (303) on its inner side; the clearance notch (303) is arranged to pass through the first fixing member (1) or the second fixing member (2) in the circumferential direction.

6. A preheating external outlet device according to claim 1, characterized in that: The heating assembly (4) includes a fixing bracket (401) that fits into the inner ring of the first fixing member (1) or the second fixing member (2); The induction cable (402) is threaded through the fixed frame (401).

7. A preheating outlet device according to claim 6, characterized in that: The fixing bracket (401) is detachably mounted on the inner ring of the first fixing member (1) or the second fixing member (2).

8. A preheating external outlet device according to claim 1, characterized in that: Anti-collision wheels (5) are sleeved at both ends of the hinge shaft of the first fixing member (1) and the second fixing member (2), and the anti-collision wheels (5) are rotatably mounted on the hinge shaft.

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