Preheating device capable of preventing welding deformation and railway wagon chassis welding equipment

Abstract

The invention discloses a preheating device capable of preventing welding deformation and railway wagon chassis welding equipment. The preheating device comprises a box body, and an air inlet is formed in the box body; each partition assembly comprises a first plate body, a second plate body and a third plate body which are vertically connected in sequence, the partition assemblies are arranged in the box body and divide the box body into a plurality of cavities, and each cavity is provided with a fire outlet; the first plate body and the third plate body are respectively connected with the second plate body in a sliding manner; the multiple baffles are connected with the corresponding third plate bodies correspondingly; and the control structure is used for controlling the first plate body to slide relative to the second plate body and controlling the third plate body to slide relative to the second plate body. According to the preheating device and the railway wagon chassis welding equipment, the to-be-welded part of the railway wagon chassis can be evenly preheated, meanwhile, the preheating range can be controlled according to needs, and the flame size can be adjusted so that the preheating requirement of the chassis poor in heat absorptivity can be met.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to a preheating device capable of preventing welding deformation and a welding device for a railway freight car chassis. Background Art

[0002] ‌The railway freight car chassis is an important part of the freight car structure, which is usually manufactured by welding technology. The chassis usually includes various types such as concave chassis, large chassis and small chassis, which are welded by various beams and plates, such as side beams, main cross beams, and pillow beams. These structures ensure the bearing capacity and stability of the chassis. In the chassis manufacturing process, welding is a key link. Therefore, a railway freight car chassis welding device is required. In order to avoid the problem of chassis welding deformation due to excessive temperature gradient, the existing railway freight car chassis welding device usually preheats the area to be welded, that is, the area to be welded is preheated with flame before welding to reduce the temperature gradient of the material.

[0003] However, the above-mentioned railway freight car chassis welding device with a preheating structure still has some disadvantages in actual use. For example, when the area to be preheated is long, multiple nozzles are generally arranged at the rear end of the pipeline so that flames are ejected from multiple nozzles. As the fuel burns or flows in the pipeline, the fuel pressure, flow rate and oxygen supply may change with the increase of distance, which may cause the nozzle located farther away to have a smaller flame due to the reduction of gas, resulting in the inability to uniformly preheat the preheating area, so that there is still a temperature gradient in the preheating area after the preheating treatment.

[0004] In view of this, it is necessary to design a preheating device and a railway freight car chassis welding device that can prevent welding deformation to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a preheating device and railway freight car underframe welding equipment which can uniformly preheat the part to be welded of the railway freight car underframe, control the preheating range according to needs, and adjust the flame size to meet the preheating requirements of the underframe with poor heat absorption, and can prevent welding deformation.

[0006] To achieve the above-mentioned purpose, the present invention provides a preheating device capable of preventing welding deformation, comprising: A box body, wherein the box body is provided with an air inlet; A partition assembly comprises a first plate body, a second plate body and a third plate body which are connected vertically in sequence, wherein the plurality of partition assemblies are arranged in the box body to divide the box body into a plurality of cavities, and each cavity is provided with a fire outlet; the first plate body is arranged at the air inlet and is slidably connected to the second plate body, and the third plate body is also slidably connected to the second plate body; Baffles, wherein the plurality of baffles are respectively connected to corresponding third plate bodies; The control structure is used to control the first plate body to slide relative to the second plate body to adjust the air intake state of each cavity, and is used to control the third plate body to slide relative to the second plate body to adjust the size of the fire outlet by using the baffle.

[0007] As a further improvement of the present invention, the air inlet and the air outlet are respectively arranged on opposite sides of the box body.

[0008] As a further improvement of the present invention, the baffle is provided with a fire outlet hole having the same size as the fire outlet.

[0009] As a further improvement of the present invention, the second plate is fixed on the box body in a direction perpendicular to the air intake direction.

[0010] As a further improvement of the present invention, the control structure includes a first connecting rod connected to a plurality of first plates, a second connecting rod connected to a plurality of third plates, and a control assembly for controlling the first connecting rod and the second connecting rod to move in a direction parallel to the second plates.

[0011] As a further improvement of the present invention, the control component includes a driving member, a first rotating member and a second rotating member respectively meshing with the driving member, and a first linear mechanism magnetically connected to the first rotating member for controlling the movement of the first connecting rod, and a second linear mechanism magnetically connected to the second rotating member for controlling the movement of the second connecting rod.

[0012] As a further improvement of the present invention, an igniter is correspondingly arranged at the fire outlet.

[0013] As a further improvement of the present invention, the specifications of the fire outlets of each cavity are the same.

[0014] The present invention also provides a method for using a preheating device capable of preventing welding deformation, comprising: The first type: uniform heating: in the initial state, several partition components divide the air inlet into equal parts, so that the gas enters several cavities evenly from the air inlet, so that the ignition effect of each cavity is equal, and uniform heating is achieved in a certain area; The second type: single-point heating: the control structure is used to control the first plate to slide relative to the second plate, so that only a single cavity remains connected, thereby achieving single-point heating in a local area; In the uniform heating state or the single-point heating state, the control structure can also be used to control the third plate to slide relative to the second plate, so that the baffle partially covers the corresponding fire outlet, making the flame of the fire outlet more concentrated, thereby achieving flame-enhanced heating.

[0015] The present invention also provides a railway freight car chassis welding device, which comprises the preheating device described in the above scheme that can prevent welding deformation.

[0016] As a further improvement of the present invention, The beneficial effects of the present invention are: 1. The present invention divides the box into several chambers through several partition components, and sets a fire outlet on each chamber, so that in the initial state, when the fuel enters the box through the air inlet, it is divided into several parts by the first plate body and enters each chamber respectively, so that each fire outlet can spray flames of the same size, uniformly preheat the preheating area, and prevent the deformation of the chassis during the welding process caused by the temperature gradient caused by the uneven flame size. At the same time, by adjusting the position of the first plate body, the fire outlet area of ​​the box body can be controlled, so that the welding device can meet the uniform heating requirements of the longer preheating area to avoid the deformation of the chassis, and can also meet the preheating requirements of the shorter preheating area, that is, the local area, to avoid unnecessary fuel waste. In addition, by adjusting the position of the third plate body, the position of the baffle connected to the third plate body can be adjusted, and then the size of the fire outlet can be adjusted by using the baffle plate to control the concentration of the flame, that is, by enhancing the concentration of the flame, the preheating effect of the chassis with poor heat absorption can be guaranteed under the same time, and the preheating requirements of the chassis with poor heat absorption can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the railway freight car chassis welding equipment.

[0018] Figure 2 Schematic diagram of the internal structure of the preheating device.

[0019] Figure 3 Schematic diagram of the internal structure of the control structure.

[0020] Figure 4 This is a schematic diagram of the interior of the box under single-point heating conditions.

[0021] Reference numerals 10, processing table; 20, frame; 30, welding head; 40, fuel tank; 50, box; 51, air inlet; 52, fire outlet; 53, air guide cover; 61, first plate; 62, second plate; 63, third plate; 64, baffle; 641, fire outlet; 71, first cavity; 72, second cavity; 73, third cavity; 81, frame; 811, through hole; 821, motor; 822, first gear; 831, second gear ; 832, first rotating shaft; 833, first iron sheet; 841, third gear; 842, second rotating shaft; 843, second iron sheet; 851, first threaded rod; 852, first slider; 853, first guide rod; 861, second threaded rod; 862, second slider; 863, second guide rod; 871, first connecting rod; 872, second connecting rod; 873, vertical rod; 881, first electromagnet; 882, second electromagnet. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0024] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0025] like Figure 2 As shown, the present invention provides a preheating device capable of preventing welding deformation, comprising: A box body 50, wherein the box body 50 is provided with an air inlet 51; The partition assembly includes a first plate 61, a second plate 62 and a third plate 63 which are vertically connected in sequence. The plurality of partition assemblies are arranged in the box 50 to divide the box 50 into a plurality of cavities, and each cavity is provided with a fire outlet 52; the first plate 61 is arranged at the air inlet 51 and is slidably connected to the second plate 62, and the third plate 63 is also slidably connected to the second plate 62; Baffles 64, wherein the baffles 64 are respectively connected to the corresponding third plate bodies 63; The control structure is used to control the first plate 61 to slide relative to the second plate 62 to adjust the air intake state of each cavity, and to control the third plate 63 to slide relative to the second plate 62 to adjust the size of the fire outlet 52 using the baffle 64.

[0026] Exemplarily, the air inlet 51 is arranged at the top of the box body 50 , and the fire outlet 52 is correspondingly arranged at the bottom of the box body 50 .

[0027] Exemplarily, two partition assemblies are provided in the box 50, and the two partition assemblies divide the inside of the box 50 into three cavities, which are respectively the first cavity 71, the second cavity 72 and the third cavity 73 from left to right. The two first plates 61 are vertically arranged to divide the air inlet 51 into three air inlet areas corresponding to the three cavities, the two second plates 62 are fixed on the box 50 perpendicular to the air inlet direction, and the two third plates 63 are vertically arranged.

[0028] There are three baffles 64, which are the first baffle and the second baffle respectively connected to the left and right sides of the third plate body 63 isolated between the first cavity 71 and the second cavity 72, and the third baffle connected to the right side of the third plate body 63 isolated between the second cavity 72 and the third cavity 73; the three baffles 64 are arranged horizontally, and the baffles 64 are provided with fire holes 641 of the same size as the fire outlet 52.

[0029] Specifically, the control structure includes a first connecting rod 871 connected to the two first plates 61 , a second connecting rod 872 connected to the two third plates 63 , and a control component for controlling the first connecting rod 871 and the second connecting rod 872 to move in a direction parallel to the second plate 62 .

[0030] Specifically, the control component includes a driving member, a first rotating member and a second rotating member respectively meshing with the driving member, and a first linear mechanism magnetically connected to the first rotating member for controlling the movement of the first connecting rod 871 and a second linear mechanism magnetically connected to the second rotating member for controlling the movement of the second connecting rod 872.

[0031] Exemplarily, a relatively closed space is provided inside the box 50 through the frame 81, and the control component is located inside the frame 81; Figure 3 As shown, the driving member is a motor 821, and a first gear 822 is provided at the output end of the motor 821; the first rotating member is a second gear 831 meshingly connected with the first gear 822, and the second gear 831 is connected to the frame 81 through a first rotating shaft 832; the second rotating member is a third gear 841 meshingly connected with a side of the first gear 822 away from the second gear 831, and the third gear 841 is connected to the frame 81 through a second rotating shaft 842; The first linear mechanism includes a first threaded rod 851 and a first slider 852 disposed on the first threaded rod 851. The first slider 852 is connected to the first connecting rod 871. One end of the first threaded rod 851 is connected to the frame 81 through a bearing, and the other end is connected to the first rotating shaft 832 through a first electromagnet 881. The second linear mechanism includes a second threaded rod 861 and a second slider 862 disposed on the second threaded rod 861. The second slider 862 is connected to the second connecting rod 872. One end of the second threaded rod 861 is connected to the frame 81 through a bearing, and the other end is connected to the second rotating shaft 842 through a second electromagnet 882. Exemplarily, a first iron sheet 833 is disposed at one end of the first rotating shaft 832 close to the first threaded rod 851 , and a second iron sheet 843 is disposed at one end of the second rotating shaft 842 close to the second threaded rod 861 .

[0032] When the position of the first plate body 61 needs to be controlled, the first electromagnet 881 is controlled to be in a power-on state, the first electromagnet 881 is magnetically connected to the first iron sheet 833, so that the first threaded rod 851 is connected to the first rotating shaft 832, and the first gear 822 is driven by the motor 821 to rotate, driving the second gear 831 to rotate, and the second gear 831 rotates to drive the first rotating shaft 832 to rotate, thereby causing the first threaded rod 851 connected to the first rotating shaft 832 to rotate. At this time, the first slider 852 moves along the first threaded rod 851, driving the first connecting rod 871 to move horizontally to adjust the position of the first plate body 61; When the position of the third plate 63 needs to be controlled, the second electromagnet 882 is controlled to be in a power-on state, the second electromagnet 882 is magnetically connected to the second iron sheet 843, so that the second threaded rod 861 is connected to the second rotating shaft 842, and the first gear 822 is driven by the motor 821 to rotate, driving the third gear 841 to rotate, and the third gear 841 rotates to drive the second rotating shaft 842 to rotate, thereby causing the second threaded rod 861 connected to the second rotating shaft 842 to rotate. At this time, the second slider 862 moves along the second threaded rod 861, driving the second connecting rod 872 to move horizontally to adjust the position of the third plate 63; The present invention can control the state of the first electromagnet 881 and / or the second electromagnet 882 as needed, so that the user can adjust the positions of the first plate 61 and the third plate 63 individually or synchronously.

[0033] Exemplarily, a perforation is provided on one side of the frame 81, and the end of the first connecting rod 871 away from the first slider 852 is straightened through the perforation outside the frame 81 and connected to the two first plate bodies 61; a through hole 811 is provided at the bottom of the frame 81, and a vertical rod 873 is connected to the second slider 862, and the end of the vertical rod 873 away from the second slider 862 passes through the through hole 811 and is connected to the second connecting rod 872.

[0034] The frame 81 and the components inside the frame 81 are made of fireproof materials, and a heat insulation layer is also provided inside the frame 81 to prevent heat from being transferred into the frame 81 and damaging the components inside the frame 81 .

[0035] Specifically, in the initial state, the first plate body 61 is arranged at one end of the second plate body 62; the connection point between the third plate body 63 and the second plate body 62 is at a certain distance from the end of the second plate body 62 away from the first plate body 61, so that when the control structure controls the third plate body 63 to slide to the right to use the baffle 64 to adjust the size of the fire outlet 52, the third plate body 63 can always remain connected to the second plate body 62, so that the cavities are still in a separated state.

[0036] Exemplarily, the specifications of the fire outlets 52 of each cavity are the same, and an igniter is correspondingly arranged at the fire outlet 52. An air guide cover 53 is also arranged at the air inlet 51.

[0037] Exemplarily, a first guide rod 853 may be provided corresponding to the first slider 852, and a second guide rod 863 may be provided corresponding to the second slider 862, so as to utilize the guide rods to improve the movement stability of the slider; taking the first slider 852 as an example, both ends of the first guide rod 853 are respectively fixed to the frame 81, and the first slider 852 is provided with a mounting hole for the first guide rod 853 to pass through, so that when the first threaded rod 851 rotates to make the first slider 852 move horizontally, the first guide rod 853 is utilized to improve the movement stability of the first slider 852 ( Figure 3 ).

[0038] The method of using the preheating device is as follows: The first type: uniform heating: in the initial state, the two first plates 61 divide the air inlet 51 equally, so that the gas enters the three cavities evenly from the air inlet, and is ignited under the action of the igniter. The generated flame is discharged through the fire outlet 52 of the same specification, so that the ignition effect of each cavity is equal, and uniform heating in a longer preheating area is achieved; Second type: single-point heating: the control structure is used to control the first plate 61 to slide relative to the second plate 62, so that only a single cavity remains connected, thereby achieving single-point heating in a shorter preheating area; In the uniform heating state or the single-point heating state, the control structure can also be used to control the third plate 63 to slide relative to the second plate 62, so that the baffle 64 partially covers the corresponding fire outlet 52, making the flame of the fire outlet 52 more concentrated, thereby achieving flame-enhanced heating.

[0039] For example, during single-point heating, the control structure controls the first plate 61 to slide rightward relative to the second plate 62, so that the two first plates 61 respectively block the second cavity 72 and the third cavity 73, so that only the first cavity 71 remains in communication with the air inlet 51 ( Figure 4 ), that is, single heating is realized, which can meet the heating needs of the shorter preheating area and avoid unnecessary fuel waste.

[0040] Specifically, in the initial state, the fire hole 641 of the baffle 64 overlaps with the fire outlet 52 vertically, that is, the baffle 64 does not block the fire outlet 52. When the control structure controls the third baffle 64 to slide to the right, the baffle 64 partially blocks the fire outlet 52, that is, the baffle 64 is used to adjust the size of the fire outlet 52 to control the concentration of the flame. By enhancing the concentration of the flame, the preheating effect of the chassis with poor heat absorption can be guaranteed under the same time, thereby meeting the preheating requirements of the chassis with poor heat absorption.

[0041] Specifically, Figure 1 As shown, the present invention also provides a railway freight car chassis welding device, the railway freight car chassis welding device has the preheating device described in the above scheme that can prevent welding deformation.

[0042] The railway freight car chassis welding equipment also includes a frame 20, a welding head 30 mounted on the frame 20, and a fuel tank 40. The frame 20 is arranged on the processing table 10 through a reciprocating structure, so that the user can adjust the position of the frame 20 as needed to preheat and weld different positions of the chassis. The reciprocating structure is an existing structure that allows the frame 20 to reciprocate relative to the processing table 10, and will not be described in detail here.

[0043] The fuel tank 40 is provided with an air delivery pipe connected to the air inlet 51 of the tank body 50 . The exemplary air delivery pipe is connected to the air guide hood 53 to deliver the combustible gas into the tank body 50 .

[0044] When in use, the railway freight car chassis to be welded is placed on the processing table 10, so that the weld to be welded is located below the preheating device, and the gas is transported to the box 50 through the gas pipe to be ignited to preheat the weld. Then, the frame 20 is moved in a certain direction and the weld is welded using the welding head 30.

[0045] Regarding preheating, the state of the preheating device can be adjusted according to the length of the weld, and uniform heating or single-point heating can be selected for preheating. At the same time, the flame size can be adjusted according to the material of the base frame. For example, if the base frame is made of a material with poor heat absorption, the size of the fire outlet 52 can be reduced accordingly to concentrate the flame and enhance the heating effect.

[0046] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A preheating device capable of preventing welding deformation, characterized in that: include: A box body, wherein the box body is provided with an air inlet; A partition assembly comprises a first plate body, a second plate body and a third plate body which are connected vertically in sequence, wherein the plurality of partition assemblies are arranged in the box body to divide the box body into a plurality of cavities, and each cavity is provided with a fire outlet; the first plate body is arranged at the air inlet and is slidably connected to the second plate body, and the third plate body is also slidably connected to the second plate body; Baffles, wherein the plurality of baffles are respectively connected to corresponding third plate bodies; The control structure is used to control the first plate body to slide relative to the second plate body to adjust the air intake state of each cavity, and is used to control the third plate body to slide relative to the second plate body to adjust the size of the fire outlet by using the baffle.

2. The preheating device for preventing welding deformation according to claim 1 is characterized in that: The air inlet and the air outlet are respectively arranged on opposite sides of the box body.

3. The preheating device capable of preventing welding deformation according to claim 1 is characterized in that: The baffle is provided with a fire outlet hole having the same size as the fire outlet.

4. The preheating device capable of preventing welding deformation according to claim 1 is characterized in that: The second plate is fixed on the box body in a direction perpendicular to the air intake direction.

5. The preheating device capable of preventing welding deformation according to claim 1 is characterized in that: The control structure comprises a first connecting rod connected to a plurality of first plates, a second connecting rod connected to a plurality of third plates, and a control assembly for controlling the first connecting rod and the second connecting rod to move in a direction parallel to the second plates.

6. The preheating device capable of preventing welding deformation according to claim 5, characterized in that: The control assembly includes a driving member, a first rotating member and a second rotating member respectively meshed with the driving member, a first linear mechanism magnetically connected to the first rotating member for controlling the movement of the first connecting rod, and a second linear mechanism magnetically connected to the second rotating member for controlling the movement of the second connecting rod.

7. The preheating device capable of preventing welding deformation according to claim 1, characterized in that: An igniter is correspondingly arranged at the fire outlet.

8. The preheating device capable of preventing welding deformation according to claim 1, characterized in that: The specifications of the fire outlets of each cavity are the same.

9. A method for using the preheating device capable of preventing welding deformation according to claim 1, characterized in that: include: The first type: uniform heating: in the initial state, several partition components divide the air inlet into equal parts, so that the gas enters several cavities evenly from the air inlet, so that the ignition effect of each cavity is equal, and uniform heating is achieved in a certain area; The second type: single-point heating: the control structure is used to control the first plate to slide relative to the second plate, so that only a single cavity remains connected, thereby achieving single-point heating in a local area; In the uniform heating state or the single-point heating state, the control structure can also be used to control the third plate to slide relative to the second plate, so that the baffle partially covers the corresponding fire outlet, making the flame of the fire outlet more concentrated, thereby achieving flame-enhanced heating.

10. A railway freight car chassis welding device, characterized in that: The railway freight car chassis welding equipment includes the preheating device for preventing welding deformation as described in claim 1.

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