Pre-welding preheating device for large plate girder

Abstract

The utility model relates to the field of large plate girder welding, and discloses a large plate girder pre-welding preheating device which comprises a moving trolley arranged on a welding track of a submerged arc welding machine, a push rod used for connecting the moving trolley and the submerged arc welding machine, and a preheater arranged on the moving trolley. A lead screw adjusting mechanism is arranged on the moving trolley and used for adjusting the height of the preheater. And an inclination angle adjusting mechanism is arranged on the lead screw adjusting mechanism and used for adjusting the inclination angle of the preheater. The movable trolley is arranged on the welding track of the submerged arc welding machine, the preheater is fixed on the movable trolley, and the movable trolley is pushed by the movement of the submerged arc welding machine during welding to drive the preheater to move along a welding seam for preheating, so that automatic and uniform preheating is realized, manual handheld preheating is not needed, and the labor intensity is reduced; the screw rod adjusting mechanism and the inclination angle adjusting mechanism are designed, so that the height and the inclination angle of the preheater are adjusted, the position of the preheater can be flexibly adjusted, and the optimal preheating effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of large plate girder welding, in particular to a preheating device for large plate girders before welding. Background Art

[0002] Large plate girders are the core components in boiler steel structure products, and are the workpieces with the highest construction quality requirements and the greatest difficulty. There are many manufacturing processes for large plate girders, and welding is the most critical process. Especially for high-strength steel plates of Q420 and Q460, the requirements for preheating before welding are even higher.

[0003] At present, the preheating of large plate girders before welding is mainly carried out by manually holding a burner to preheat along the weld. This preheating method has a high labor intensity and a high preheating environment temperature, which is not conducive to the physical health of the staff.

[0004] Based on this, the present application provides a preheating device for large plate girders before welding, which is convenient for adjusting the preheating angle and position, and can use a submerged arc welding machine to push the preheating device to move forward along the weld to solve the above problems. Summary of the Utility Model

[0005] The utility model aims to solve the technical problems existing in the prior art. For this purpose, the utility model provides a preheating device for large plate girders before welding, which is convenient for adjusting the preheating angle and position, and can use a submerged arc welding machine to push the preheating device to move forward along the weld.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] Provide a preheating device for large plate girders before welding, including a moving trolley arranged on the welding track of a submerged arc welding machine, a push rod for connecting the moving trolley and the submerged arc welding machine, and a preheater arranged on the moving trolley; a screw rod adjusting mechanism is arranged on the moving trolley for adjusting the height of the preheater; an inclination angle adjusting mechanism is arranged on the screw rod adjusting mechanism for adjusting the inclination angle of the preheater.

[0008] In a preferred embodiment of the utility model, the screw rod adjusting mechanism includes a support arranged on the moving trolley, a screw rod vertically rotatably arranged on the support, and a slider slidably connected to the support and screwed on the screw rod, and the inclination angle adjusting mechanism is arranged on the slider.

[0009] In a preferred embodiment of the utility model, the inclination angle adjusting mechanism includes a fixed shaft arranged on the slider and a sleeve for installing the preheater, and a connecting ear plate is arranged on the sleeve, and the connecting ear plate is locked on the fixed shaft by a nut.

[0010] In a preferred embodiment of the present utility model, the inclination angle adjusting mechanism further includes a first end face gear ring, a second end face gear ring and a spring. The first end face gear ring is concentrically arranged on the slider with the fixed shaft, the second end face gear ring is meshed with the first end face gear ring and arranged on the connecting ear plate, and the spring is arranged between the first end face gear ring and the second end face gear ring.

[0011] In a preferred embodiment of the present utility model, the preheater includes a main air pipe, a plurality of nozzles arranged on the main air pipe and an operating rod arranged on the main air pipe. A gas connector is arranged on the main air pipe, the gas connector is connected to a gas tank through a gas pipeline, and the operating rod is slidably arranged in a sleeve and locked in position by a locking screw on the sleeve.

[0012] In a preferred embodiment of the present utility model, a limiting groove is arranged on the operating rod, and a rib is arranged on the inner wall of the sleeve and slidably connected to the limiting groove.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By arranging a moving trolley on the welding track of the submerged arc welding machine in the present utility model, the preheater is fixed on the moving trolley, and the moving trolley is connected to the submerged arc welding machine through a push rod. When the submerged arc welding machine moves during welding, it pushes the moving trolley to drive the preheater to move along the weld for preheating, realizing automatic and uniform preheating, with good preheating effect, no need for manual holding of the preheater, and reducing labor intensity.

[0015] 2. The designed screw rod adjusting mechanism and inclination angle adjusting mechanism realize the adjustment of the height and inclination angle of the preheater, enabling the preheater to flexibly adjust its position to ensure the best preheating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0017] Figure 1 is the installation top view of the preheating device for large plate girders before welding provided by the present utility model;

[0018] Figure 2 is the side view structure diagram of the preheating device for large plate girders before welding provided by the present utility model;

[0019] Figure 3 is the connection structure diagram of the screw rod adjusting mechanism and the inclination angle adjusting mechanism provided by the present utility model;

[0020] Figure 4 Yes Figure 3 The provided partial enlarged view.

[0021] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0022] 1 - Mobile trolley, 2 - Push rod, 3 - Preheater, 3.1 - Main gas pipe, 3.2 - Sprayer head, 3.3 - Operating rod, 3.3.1 - Limit groove, 3.4 - Gas connector, 4 - Lead screw adjustment mechanism, 4.1 - Support, 4.2 - Lead screw, 4.3 - Slide block, 5 - Inclination adjustment mechanism, 5.1 - Fixed shaft, 5.2 - Sleeve, 5.2.1 - Connecting ear plate, 5.3 - Nut, 5.4 - First end face gear ring, 5.5 - Second end face gear ring, 5.6 - Spring, 10 - Wing plate, 20 - Web, 30 - Submerged arc welding machine, 40 - Welding track. Specific embodiments

[0023] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention; the terms "installation", "connection", "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

[0026] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of the technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] Example 1

[0028] This embodiment provides a preheating device for large girders before welding, which is used for preheating large girders before welding. As shown in the attached drawings Figure 2 As shown, the large girder needs to weld the flange 10 and the web 20. The welding track 40 of the submerged arc welding machine 30 is arranged on the horizontally placed web 20 (along the weld).

[0029] As shown in the attached drawings Figure 1 and the attached drawings Figure 2 As shown, the preheating device of this embodiment includes a moving trolley 1 arranged on the welding track 40 of the submerged arc welding machine 30, a push rod 2 for connecting the moving trolley 1 and the submerged arc welding machine 30, and a preheater 3 arranged on the moving trolley 1. In this embodiment, during welding, the moving of the submerged arc welding machine pushes the moving trolley to drive the preheater to move along the weld for preheating, realizing automatic and uniform preheating, with good preheating effect, no need for manual holding of the preheater, and reducing labor intensity.

[0030] Preferably, as shown in the attached drawings Figure 2 As shown, the preheater 3 includes a main gas pipe 3.1, a plurality of nozzles 3.2 arranged on the main gas pipe, and an operating rod 3.3 arranged on the main gas pipe. The angle and position of the nozzles can be controlled through the operating rod. A gas connector 3.4 is arranged on the main gas pipe 3.1, and the gas connector is connected to a gas tank through a gas pipeline. After the main gas pipe of the preheater in this embodiment is filled with gas, igniting the nozzles can form a jet flame (the ignition method can use an igniter).

[0031] For the convenience of adjusting the preheater, a screw rod adjusting mechanism 4 is arranged on the moving trolley 1 in this embodiment, which is used to adjust the height of the preheater; further, an inclination adjusting mechanism 5 is arranged on the screw rod adjusting mechanism 4, which is used to adjust the inclination angle of the preheater 3.

[0032] Preferably, as shown in the attached drawings Figure 2 and the attached drawings Figure 3 As shown, the screw rod adjusting mechanism 4 in this embodiment includes a support 4.1 arranged on the moving trolley 1, a screw rod 4.2 vertically rotatably arranged on the support, and a slider 4.3 slidably connected to the support and screwed on the screw rod. The inclination adjusting mechanism 5 is arranged on the slider 4.3. Since the preheater is arranged on the inclination adjusting mechanism, and the inclination adjusting mechanism is arranged on the slider, the lifting of the preheater can be realized by rotating the screw rod, thereby realizing the height adjustment of the preheater.

[0033] Preferably, as shown in the attached drawings Figure 2 and the attached drawings Figure 3As shown, the inclination adjustment mechanism 5 in this embodiment comprises a fixed shaft 5.1 arranged on the slider 4.3 and a sleeve 5.2 for mounting the preheater 3, and a connecting lug 5.2.1 is arranged on the sleeve 5.2, and the connecting lug 5.2.1 is locked on the fixed shaft 5.1 by a nut 5.3. In this embodiment, the operating rod of the preheater is fixedly installed in the sleeve, and the sleeve is locked on the fixed shaft of the slider by a nut. When the inclination needs to be adjusted, the nut is loosened, and the sleeve can rotate around the fixed shaft. After the angle is adjusted, the nut can be tightened.

[0034] Preferably, the operating rod 3.3 in this embodiment is slidably arranged in the sleeve 5.2 and locked in position by a locking screw on the sleeve. The sliding connection between the operating rod and the sleeve can realize the forward and backward movement of the preheater, making its position adjustment more flexible.

[0035] Preferably, the operating rod 3.3 is provided with a limit groove 3.3.1, and the inner wall of the sleeve 5.2 is provided with a rib slidably connected to the limit groove. This arrangement ensures that it can only move along the length direction of the operating rod but cannot rotate, thereby preventing the preheater from deflecting.

[0036] Embodiment 2

[0037] Based on the first embodiment, as shown in the attached Figure 4 As shown, the present embodiment further provides a first end face toothed ring 5.4, a second end face toothed ring 5.5 and a spring 5.6 on the inclination adjustment mechanism 5. The first end face toothed ring 5.4 is arranged on the slider 4.3 concentrically with the fixed shaft 5.1, the second end face toothed ring 5.5 is arranged on the connecting ear plate 5.2.1 to mesh with the first end face toothed ring 5.4, and the spring 5.56 is arranged between the first end face toothed ring 5.4 and the second end face toothed ring 5.5. The inclination adjustment mechanism designed in the present embodiment, under the action of the nut, enables the second end face toothed ring to mesh with the first end face toothed ring to overcome the action of the spring, and can fix the position of the sleeve, and then fix the position of the preheater. When the position of the preheater needs to be adjusted, the preheater is pulled up or down, and the sleeve receives a torsional force and rotates. After the torsional force disappears, the second end face toothed ring and the second end face toothed ring are meshed and fixed. This structure does not require manual twisting of the nut, and is easy to operate.

[0038] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A preheating device for large plate beams before welding, characterized in that: It includes a moving trolley arranged on the welding track of the submerged arc welding machine, a push rod used to connect the moving trolley and the submerged arc welding machine, and a preheater arranged on the moving trolley; The movable trolley is provided with a screw adjustment mechanism for adjusting the height of the preheater; The screw rod adjustment mechanism is provided with an inclination angle adjustment mechanism for adjusting the inclination angle of the preheater.

2. The large plate beam pre-welding preheating device according to claim 1 is characterized in that: The screw rod adjustment mechanism comprises a support arranged on the moving trolley, a screw rod arranged on the support for vertical rotation, and a slider slidably connected to the support and screwed on the screw rod, and the inclination adjustment mechanism is arranged on the slider.

3. The large plate beam preheating device before welding according to claim 2 is characterized in that: The inclination adjustment mechanism comprises a fixed shaft arranged on the slider and a sleeve for mounting the preheater, wherein the sleeve is provided with a connecting ear plate, and the connecting ear plate is locked on the fixed shaft through a nut.

4. The large plate beam preheating device before welding according to claim 3 is characterized in that: The inclination adjustment mechanism also includes a first end face toothed ring, a second end face toothed ring and a spring. The first end face toothed ring is arranged on the sliding block concentrically with the fixed shaft, the second end face toothed ring is arranged on the connecting ear plate and meshes with the first end face toothed ring, and the spring is arranged between the first end face toothed ring and the second end face toothed ring.

5. The large plate beam pre-welding preheating device according to claim 4 is characterized in that: The preheater includes a main gas pipe, a plurality of nozzles arranged on the main gas pipe and an operating rod arranged on the main gas pipe. The main gas pipe is provided with a gas connector, and the gas connector is connected to the gas tank through a gas pipeline. The operating rod is slidably arranged in a sleeve and is locked in position by a locking screw on the sleeve.

6. The large plate beam preheating device before welding according to claim 5 is characterized in that: The operating rod is provided with a limiting groove, and the inner wall of the sleeve is provided with a convex rib slidably connected to the limiting groove.

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