Heating device for welding of marine through-hole pipe fittings

Abstract

This utility model relates to the field of shipbuilding technology, and in particular to a heating device for welding and installing shipboard passageway pipe fittings. It includes a first fixing plate, on which two second fixing plates are symmetrically fixed. Electric heating tubes are fixed to the opposite sides of each of the two second fixing plates. A fixing column is fixed to the first fixing plate, which is positioned between the fixing column and the two second fixing plates. A reciprocating reverse drive mechanism is fixed to the end of the fixing column furthest from the first fixing plate. In use, the two reciprocating electric heating tubes simultaneously preheat the inner and outer walls of the passageway pipe fitting, ensuring that the preheating of the inner and outer walls is not sequential, thereby improving the uniformity of preheating and ultimately enhancing the preheating effect.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, and in particular to a heating device for welding and installing shipboard pipe fittings. Background Technology

[0002] The use of high-strength steel in ship hulls is increasing, and the materials for supporting through-hole pipe fittings are also developing towards higher strength. Furthermore, to improve their pressure-bearing capacity, the pipe walls are gradually becoming thicker, which presents significant challenges to welding. To ensure the welding quality of thick-walled high-strength steel welds, preheating is necessary. This preheating slows down cooling, preventing hardening of the microstructure and allowing sufficient time for hydrogen in the weld to escape. Uniform preheating also reduces stress in the weld joint, ultimately reducing its crack susceptibility and ensuring the safety of the ship. Currently, when preheating through-hole pipe fittings, a handheld flame gun is used to heat the inner and outer walls separately. However, for thick-walled through-hole pipe fittings, the sequential heating of the inner and outer walls leads to uneven preheating. In addition, the use of a flame gun poses safety risks due to the open flame. Therefore, it is necessary to install welding heating devices for shipboard through-hole pipe fittings to meet these requirements. Utility Model Content

[0003] The purpose of this invention is to solve the problem of uneven preheating of thick-walled through-hole pipe fittings in the prior art, and to propose a heating device for welding and installing through-hole pipe fittings in ships.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The design includes a heating device for welding and installing pipe fittings in a ship's through-hole, comprising a first fixing plate, two second fixing plates symmetrically fixed on the same side of the first fixing plate, electric heating tubes fixed on opposite sides of the two second fixing plates, a fixing column fixed on the first fixing plate, the first fixing plate being positioned between the fixing column and the two second fixing plates, and a reciprocating reverse drive mechanism fixed on the end of the fixing column away from the first fixing plate.

[0006] Preferably, the reciprocating reverse drive mechanism includes a connecting rod, which is fixed to the end of the fixed column away from the first fixed plate, and a forward and reverse motor is fixed on the connecting rod.

[0007] Preferably, the forward and reverse motor is fixed with a fixing frame.

[0008] Preferably, the limit mechanism is fixed together on both of the second fixed plates.

[0009] Preferably, the limiting mechanism includes a first limiting component and a second limiting component, wherein the first limiting component and the second limiting component are respectively fixed on two second fixing plates.

[0010] Preferably, the first limiting component includes a fixing rod, which is fixed to one of the second fixing plates, and a first pulley is fixed on the fixing rod.

[0011] Preferably, the second limiting component includes a connecting component, which is fixed to another second fixing plate, and a second pulley is fixed on the connecting component.

[0012] Preferably, the connecting assembly includes a cylinder and a threaded rod, the cylinder and the threaded rod being fixed to another second fixing plate and a second pulley respectively, and the threaded rod being threadedly inserted into the cylinder.

[0013] The heating device for welding and installing ship through-hole pipe fittings proposed in this utility model has the following advantages: When in use, the two reciprocating electric heating tubes simultaneously preheat the inner and outer walls of the through-hole pipe fittings, so that the preheating of the inner and outer walls of the through-hole pipe fittings is not sequential, thereby improving the uniformity of preheating and thus improving the preheating effect of the through-hole pipe fittings. Attached Figure Description

[0014] Figure 1 A front view of the heating device for welding and installing ship passageway pipe fittings proposed in this utility model;

[0015] Figure 2 Left view of the heating device for welding and installing ship passageway pipe fittings proposed in this utility model;

[0016] Figure 3 The heating device for welding the ship passageway pipe fittings proposed in this utility model Figure 1 A bottom view at point AA;

[0017] Figure 4 Top view of the heating device for welding and installing ship passageway pipes proposed in this utility model;

[0018] Figure 5 This is a front view of the heating device for welding the ship passageway pipe fittings proposed in this utility model when used on the passageway pipe fittings.

[0019] In the diagram: 1. First fixing plate; 2. Second fixing plate; 3. Electric heating tube; 4. Fixing column; 5. Connecting rod; 6. Forward and reverse motor; 7. Fixing frame; 8. Fixing rod; 9. First pulley; 10. Cylinder; 11. Threaded rod; 12. Connecting assembly; 13. Second pulley. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example 1: Refer to Figure 1-4 A heating device for welding and installing shipboard through-hole pipe fittings includes a first fixing plate 1. Two second fixing plates 2 are symmetrically fixed on the same side of the first fixing plate 1. Electric heating tubes 3 are fixed on opposite sides of the two second fixing plates 2. The two electric heating tubes 3 preheat the inner and outer walls of the through-hole pipe fittings simultaneously. A fixing column 4 is fixed on the first fixing plate 1. The first fixing plate 1 is located between the fixing column 4 and the two second fixing plates 2. A reciprocating and reversing drive mechanism is fixed on the end of the fixing column 4 away from the first fixing plate 1. With the assistance of the reciprocating and reversing drive mechanism, the two electric heating tubes 3 can rotate forward and reverse alternately when preheating the inner and outer walls of the through-hole pipe fittings, ensuring that the power supply wires on the two electric heating tubes 3 will not tangle during use, thereby ensuring the normal use of the two electric heating tubes 3.

[0022] The reciprocating reverse drive mechanism includes a connecting rod 5, which is fixed to the end of the fixed column 4 away from the first fixed plate 1. A forward and reverse motor 6 is fixed on the connecting rod 5, and a fixed frame 7 is fixed on the forward and reverse motor 6. The fixed frame 7 is used for the operator to hold.

[0023] In use, the operator holds the fixed frame 7 and inserts one of the second fixed plates 2 with the electric heating tube 3 into the inside of the duct fitting, while the other second fixed plate 2 with the electric heating tube 3 is on the outside of the duct fitting. Then, the forward and reverse motor 6 is started. With the assistance of the forward and reverse motor 6, the two electric heating tubes 3 rotate forward and reverse alternately. The two reciprocating electric heating tubes 3 preheat the inner and outer walls of the duct fitting simultaneously, so that the preheating of the inner and outer walls of the duct fitting is not sequential, thereby improving the uniformity of the preheating of the duct fitting and thus improving the preheating effect of the duct fitting.

[0024] Example 2: In Example 1, since the position of one of the second fixing plates 2, with the electric heating tube 3 inserted inside the passage pipe is manually controlled, during use, one of the two electric heating tubes 3 will inevitably touch the inner or outer wall of the passage pipe, easily damaging the electric heating tube 3 and directly affecting its service life. (Refer to...) Figure 1-5As another preferred embodiment of this utility model, the difference from embodiment 1 is that a limiting mechanism is fixed on both second fixing plates 2. The limiting mechanism includes a first limiting component and a second limiting component. The first limiting component and the second limiting component are respectively fixed on the two second fixing plates 2. The first limiting component and the second limiting component are used to restrict the position of the two second fixing plates 2, so that the two electric heating tubes 3 will not come into contact with the inner or outer wall of the passage pipe, thereby achieving the purpose of protecting the two electric heating tubes 3.

[0025] The first limiting component includes a fixing rod 8, which is fixed to one of the second fixing plates 2. A first pulley 9 is fixed to the fixing rod 8. The second limiting component includes a connecting component 12, which is fixed to another second fixing plate 2. A second pulley 13 is fixed to the connecting component 12. The connecting component 12 includes a cylinder 10 and a threaded rod 11, which are respectively fixed to the other second fixing plate 2 and the second pulley 13. The threaded rod 11 is threaded into the cylinder 10. The cooperation between the threaded rod 11 and the cylinder 10 allows the distance between the first pulley 9 and the second pulley 13 to be adjusted, thereby meeting the usage requirements of hatch fittings of different diameters.

[0026] In use, the second pulley 13 is turned according to the diameter of the navigable pipe to be preheated, so that the total length of the threaded rod 11 and the cylinder 10 meets the diameter requirement of the navigable pipe. The second fixing plate 2, which is fixed with the cylinder 10, is inserted into the navigable pipe. At this time, the forward and reverse motor 6 and the navigable pipe are coaxially arranged. The first pulley 9 and the second pulley 13 are in contact with the outer wall and inner wall of the navigable pipe, respectively, thereby restricting the position of the two second fixing plates 2. During the preheating process of the navigable pipe, the two electric heating tubes 3 will not come into contact with the inner wall or the outer wall of the navigable pipe.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heating device for welding and installing shipboard duct fittings, comprising a first fixing plate (1), characterized in that, Two second fixing plates (2) are symmetrically fixed on the same side of the first fixing plate (1). Electric heating tubes (3) are fixed on the opposite sides of the two second fixing plates (2). A fixing column (4) is fixed on the first fixing plate (1). The first fixing plate (1) is located between the fixing column (4) and the two second fixing plates (2). A reciprocating reverse drive mechanism is fixed on the end of the fixing column (4) away from the first fixing plate (1).

2. The heating device for welding and installing shipboard passage pipe fittings according to claim 1, characterized in that, The reciprocating reverse drive mechanism includes a connecting rod (5), which is fixed to the end of the fixed column (4) away from the first fixed plate (1), and a forward and reverse motor (6) is fixed on the connecting rod (5).

3. The heating device for welding and installing shipboard passage pipe fittings according to claim 2, characterized in that, A fixing frame (7) is fixed on the forward and reverse motor (6).

4. The heating device for welding and installing shipboard passage pipe fittings according to claim 1, characterized in that, A limit mechanism is fixed together on the two second fixed plates (2).

5. The heating device for welding and installing shipboard passage pipe fittings according to claim 4, characterized in that, The limiting mechanism includes a first limiting component and a second limiting component, which are respectively fixed on two second fixing plates (2).

6. The heating device for welding and installing shipboard passage pipe fittings according to claim 5, characterized in that, The first limiting component includes a fixing rod (8), which is fixed on one of the second fixing plates (2), and a first pulley (9) is fixed on the fixing rod (8).

7. The heating device for welding and installing shipboard passage pipe fittings according to claim 5, characterized in that, The second limiting component includes a connecting component (12), which is fixed on another second fixing plate (2), and a second pulley (13) is fixed on the connecting component (12).

8. The heating device for welding and installing shipboard passage pipe fittings according to claim 7, characterized in that, The connecting assembly (12) includes a cylinder (10) and a threaded rod (11), the cylinder (10) and the threaded rod (11) being fixed on another second fixing plate (2) and the second pulley (13) respectively, and the threaded rod (11) being threadedly inserted into the cylinder (10).

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