Auxiliary welding device for mixing blades of mixing machine

Abstract

The utility model relates to the technical field of mixing machines, in particular to an auxiliary welding device for mixing blades of a mixing machine. Comprising a connecting flange, a walking mechanism and a connecting pipe, the connecting flanges are in bolted connection with shaft end flanges at the two ends of the mixing machine stirring shaft; one end of the connecting pipe is connected with a combustible gas source pipeline, and the other end of the connecting pipe extends into the mixing machine stirring shaft through the connecting flange; the walking mechanism is fixedly connected to the other end of the connecting pipe and is positioned in the stirring shaft of the mixing machine; the walking mechanism comprises a plurality of auxiliary wheels which are circumferentially and uniformly distributed, the outer edges of the auxiliary wheels correspond to the inner wall of the stirring shaft, and the auxiliary wheels walk along the inner wall of the stirring shaft. The auxiliary welding device is used for assisting in welding the stirring blade base, the welding quality is improved, and then the blade base is prevented from being broken in the vibration process.

Description

Technical Field

[0001] The utility model relates to the technical field of mixers, in particular to an auxiliary welding device for the mixing blade of a mixer. Background Art

[0002] A mixer is a mechanical device that uses mechanical force and gravity, etc. to uniformly mix two or more materials. During the mixing process, the contact surface area of the materials can also be increased to promote chemical reactions; physical changes can also be accelerated. A large mixer can mix several granular materials with a size of ≤ 80 mm in a certain proportion and then enter the next process or be loaded and transported elsewhere. It is commonly used in the coking plant, the pulverized coal mixing in the thermal power plant; the sludge treatment to produce organic fertilizer by mixing; the mixing of materials in the dust removal system or the ash silo system of the thermal power plant, etc.

[0003] Since the processing capacity of a large mixer reaches 1,200 tons per hour, the blade bases welded on the two mixing shafts are always torn or fractured under the influence of torque and bending moment. This is mainly because the materials of both the mixing shaft and the base are low-alloy high-strength structural steel 16Mn steel. During the material mixing process, the mixing blades are always vibrating and trembling. If special procedures are not taken during the welding of 16Mn steel, that is, when the blade base is welded to the outer wall of the mixing shaft, the inner wall of the mixing shaft is heated to make the inside and outside heat evenly, the welding quality of the blade base cannot be guaranteed, and further the blade base will fracture during the vibration process. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an auxiliary welding device for the mixing blade of a mixer, which is used to assist in welding the blade base, improve the welding quality, and further avoid the fracture of the blade base during the vibration process.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An auxiliary welding device for the mixing blade of a mixer includes a connecting flange, a traveling mechanism and a connecting pipe; the connecting flange is bolted to the shaft end flanges at both ends of the mixer mixing shaft; one end of the connecting pipe is connected to the combustible gas source pipeline, and the other end of the connecting pipe extends into the mixer mixing shaft through the connecting flange; the traveling mechanism is fixedly connected to the other end of the connecting pipe and is located inside the mixer mixing shaft; the traveling mechanism includes a plurality of auxiliary wheels evenly distributed in the circumferential direction, the outer edge of the auxiliary wheel corresponds to the inner wall of the mixing shaft, and the auxiliary wheel travels along the inner wall of the mixing shaft.

[0007] Further, bolt holes corresponding to the shaft end flanges at both ends of the mixer mixing shaft are evenly distributed on the outer side of the connecting flange, and a through hole corresponding to the connecting pipe is provided at the center.

[0008] Further, the traveling mechanism includes a center disc, a support rod, a support, a wheel axle, and an auxiliary wheel; the center disc is disc-shaped, and a through hole corresponding to the connecting pipe is provided at the center; one end of the support rod is fixedly connected to the center disc, and the support is fixedly connected to the other end of the support rod; the wheel axle is fixedly connected to the support, and the auxiliary wheel is installed on the wheel axle and can rotate around the wheel axle.

[0009] Further, the support is U-shaped, composed of two parallel side edges and a bottom edge perpendicular to the side edges. Both ends of the wheel axle are fixedly connected to the side edges, and the wheel axle is parallel to the bottom edge.

[0010] Further, one end of the connecting pipe is connected to a combustible gas source through a flexible hose.

[0011] Compared with the prior art, the utility model has at least the following technical effects or advantages:

[0012] The utility model includes a connecting flange, a traveling mechanism, and a connecting pipe. It is fixed on the mixing shaft of the mixer through the connecting flange. One end of the connecting pipe is connected to the combustible gas source pipeline, and the other end of the connecting pipe extends into the mixing shaft through the connecting flange. After the combustible gas at the other end of the connecting pipe is ignited by an open flame, the traveling mechanism drives the connecting pipe to move in the mixing shaft, thereby realizing uniform heating within a range of 1 / 2 of the length of the mixing shaft, improving the welding quality of the base of the mixing blade, and further avoiding the fracture of the base of the mixing blade during vibration. Description of the Drawings

[0013] Figure 1 is a schematic cross-sectional view of the working state structure of the utility model.

[0014] Figure 2 is a schematic diagram of the working state structure of the utility model.

[0015] Figure 3 is a schematic side view of the traveling mechanism structure of the utility model.

[0016] Figure 4 is a schematic front view of the traveling mechanism structure of the utility model.

[0017] Figure 5 is a schematic diagram of the connecting flange structure of the utility model.

[0018] In the figure:

[0019] 1 - connecting flange, 11 - bolt hole, 12 - through hole, 2 - traveling mechanism, 21 - center disc, 22 - support rod, 23 - support, 24 - wheel axle, 25 - auxiliary wheel, 3 - connecting pipe, 4 - mixing shaft, 5 - flexible hose, 6 - base of mixing blade Detailed Embodiments

[0020] Embodiments of the present utility model will be described in detail below. To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part rather than all of the embodiments of the present utility model. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model 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 thus should not be construed as limiting the present utility model.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In the description of the present utility model, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present utility model. At the same time, it should be clear that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0025] In addition, it should be noted that the use of terms such as "first" and "second" to limit the components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above terms have no special meaning, and therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0026]

Embodiment

[0027] As Figures 1-5 shown, a hybrid machine stirring blade auxiliary welding device includes a connecting flange 1, a traveling mechanism 2, and a connecting pipe 3.

[0028] The stirring shaft 4 of the hybrid machine is a hollow shaft, and shaft end flanges are provided at both ends. Bolt holes 11 adapted to the shaft end flanges at both ends of the stirring shaft 4 of the hybrid machine are evenly distributed on the outer side of the connecting flange 1, and a through hole 12 corresponding to the connecting pipe 3 is provided at the center. The connecting flange 1 is connected to the shaft end flanges at both ends of the stirring shaft 4 of the hybrid machine by bolts, and thus is fixedly connected to both ends of the stirring shaft 4 of the hybrid machine.

[0029] In this embodiment, the left end of the connecting pipe 3 is connected to the combustible gas source pipeline through a hose 5, the right end of the connecting pipe 3 extends into the stirring shaft 4 of the hybrid machine through the connecting flange 1, and the connecting pipe 3 extends into the stirring shaft 4 through the through hole 12.

[0030] The traveling mechanism 2 includes a central disk 21, a support rod 22, a support 23, a wheel axle 24, and an auxiliary wheel 25. The central disk 21 is disk-shaped, and a through hole 12 corresponding to the connecting pipe 3 is provided at the center. The through hole 12 of the central disk 21 penetrates the left end of the connecting pipe 3 and is then welded to the connecting pipe 3.

[0031] In this embodiment, three support rods 22 are provided, and the three support rods 22 are fixedly connected to the central disk 21 in a circumferentially uniform manner.

[0032] The support rod 22 is made of round steel. One end of the support rod 22 is fixedly connected to the central disc 21, and the support 23 is fixedly connected to the other end of the support rod 22.

[0033] The support 23 is U-shaped, composed of two parallel side edges and a bottom edge perpendicular to the side edges. Both ends of the wheel axle 24 are fixedly connected to the side edges, and the wheel axle 24 is parallel to the bottom edge.

[0034] The auxiliary wheel 25 is installed on the wheel axle 24 and can rotate around the wheel axle 24. The outer edge of the auxiliary wheel 25 corresponds to the inner wall of the stirring shaft 4, and the auxiliary wheel 25 travels along the inner wall of the stirring shaft 4.

[0035] The working principle and process of the present utility model are as follows:

[0036] 1) Numerically control the blanking of the base 6 of the stirring blade, draw a baseline on the outer circle with a designed pipe diameter of φ402×20mm and a length of 8000mm, and assemble the base 6 of the stirring blade. Use a welding rod to perform tack welding on the base 6 of the stirring blade.

[0037] 2) Place the steel pipe of the stirring shaft 4 (hollow shaft) with a diameter of φ402×20mm and a length of 8000mm on the welding platform, and support both ends with V-shaped roller supports. The stirring shaft 4 can roll on it.

[0038] 3) Take a steel pipe (connecting pipe 3) with a diameter of φ20×2.75mm and a length of L = 4200mm, insert one end into the gas hose and tie it firmly with wire.

[0039] 4) Take another steel pipe (connecting pipe 3) with a diameter of φ20×2.75mm and a length of L = 4200mm, and tie the two steel pipes (connecting pipes 3) together in parallel with wire.

[0040] 5) Fix the traveling mechanism 2 at an appropriate position on the connecting pipe 3, and the auxiliary wheel 25 can rotate.

[0041] 6) At the left end of the connecting pipe 3, ignite the gas with an open flame, aiming to make the heat evenly distributed within a length range of 1 / 2 of the total length of the stirring shaft 4.

[0042] 7) Use a far-infrared thermometer to detect the preheating temperature of the stirring shaft 4. When the temperature reaches 120 - 160°C, the welder starts to perform fillet welding on the base 6 of the stirring blade and the stirring shaft 4. When welding, use CO₂ gas shielded welding, and select ER50-6, φ1.2 solid-core welding wire for the welding wire.

[0043] 8) By rolling the stirring shaft 4, keep the welding position arm in the horizontal welding position all the time. Distribute 3 - 4 welders evenly within a length range of 1 / 2 of the hollow shaft length until this part of the workload is completed.

[0044] 9) Rotate the stirring shaft 4 by 180°, and repeat steps 5 - 7 to complete the welding of the base 6 of the stirring blades on the entire stirring shaft 4.

[0045] 10) Move the burning gas to a position 500 mm away from the end of the stirring shaft 4, close the valve slightly to reduce the gas output and thus the heat output, and let the stirring shaft 4 cool slowly. The slow cooling time is about 3 hours.

[0046] 11) Turn off the open fire of the gas, and let the extra-long stirring shaft 4 and the base 6 of the stirring blades cool down to room temperature.

[0047] The utility model is used to assist in welding the base 6 of the stirring blades, improve the welding quality, and further avoid the fracture of the base 6 of the stirring blades during vibration.

[0048] The protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution and the inventive concept of the utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the utility model.

Claims

1. A device for auxiliary welding of mixing blades of a mixer, characterized in that: It includes a connecting flange, a running mechanism and a connecting pipe; The connecting flange is bolted to the shaft end flanges at both ends of the mixing shaft of the mixer; One end of the connecting pipe is connected to the combustible gas source pipeline, and the other end of the connecting pipe extends into the mixing shaft of the mixer through the connecting flange; The running mechanism is fixedly connected to the other end of the connecting pipe and is located in the mixing shaft of the mixer; the running mechanism includes a plurality of auxiliary wheels evenly distributed around the circumference, the outer edges of the auxiliary wheels correspond to the inner wall of the mixing shaft, and the auxiliary wheels run along the inner wall of the mixing shaft.

2. The auxiliary welding device for mixer stirring blades according to claim 1, characterized in that: The outer side of the connecting flange is evenly distributed with bolt holes corresponding to the shaft end flanges at both ends of the mixing shaft of the mixer, and the center is provided with a through hole corresponding to the connecting pipe.

3. The auxiliary welding device for mixer stirring blades according to claim 1, characterized in that: The running mechanism includes a center plate, a support rod, a support, a wheel axle and auxiliary wheels; The central disk is in the shape of a disk, and a through hole corresponding to the connecting pipe is provided at the center; One end of the support rod is fixedly connected to the center plate, and the support is fixedly connected to the other end of the support rod; The wheel axle is fixedly connected to the support, and the auxiliary wheel is installed on the wheel axle and can rotate around the wheel axle.

4. The auxiliary welding device for mixer stirring blades according to claim 3, characterized in that: The support is in the shape of a U, and is composed of two mutually parallel side edges and a bottom edge perpendicular to the side edges. The two ends of the wheel axle are fixedly connected to the side edges, and the wheel axle is parallel to the bottom edge.

5. The auxiliary welding device for mixer stirring blades according to claim 1, characterized in that: One end of the connecting pipe is connected to a combustible gas source through a hose.

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