A flexible butt joint device for container welding flange and a butt joint method thereof

Abstract

The present invention discloses a flexible docking device for a container welding flange and a docking method thereof. The flexible docking device for a container welding flange includes a fixed upper flange, a flexible docking assembly fixedly equipped with a lower flange, a lifting platform positioned and installed with the flexible docking assembly, a frame structure, and a lifting shaft system driving the lifting platform to lift along the frame structure; the flexible docking assembly includes a supporting bottom plate and a flexible plate flexibly installed above the supporting bottom plate through multiple groups of flexible structures; the lower flange is fixedly installed on the flexible plate. Through the flexible docking assembly, under the action of multiple groups of flexible structures, the deviations of the lower flange in various directions can be adjusted to better adapt to the fixed upper flange after welding. To ensure the tight fit between the fixed upper flange and the lower flange, the butt sealing of the welding flange can be comprehensively realized through the combination of high-precision positioning of the shaft system and flexible adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of special equipment, and in particular to a flexible butt joint device for a container welding flange and a butt joint method thereof. Background Art

[0002] In the pressure vessel or vacuum equipment industry, automatic flange docking is a common and important technology, and automatic docking of lower flanges is particularly common. However, the container flange is often connected to the main body by welding, so there is a certain deviation in the flatness of the flange, which brings great difficulties to the design of the automatic docking lifting device.

[0003] The use of a screw lifting mechanism with high lifting accuracy cannot solve the problem of deviation docking of welding flanges, while the use of a scissor lift mechanism with low lifting accuracy cannot solve the problem of lifting accuracy.

[0004] The present invention provides a lifting device with a flexible butt joint flange, which can meet the problem of automatic butt joint of container welding flanges, thereby ensuring the sealing requirement of the container. Summary of the invention

[0005] The purpose of the present invention is to provide a flexible docking device for a container welding flange in view of the technical defect that the lifting accuracy and flexible docking cannot be taken into account at the same time in the prior art.

[0006] Another object of the present invention is to provide a docking method for the above-mentioned container welding flange flexible docking device.

[0007] The technical solution adopted to achieve the purpose of the present invention is:

[0008] A flexible docking device for welding flanges of a container, comprising a fixed upper flange, a flexible docking assembly fixedly equipped with a lower flange, a lifting platform positioned and installed with the flexible docking assembly, a frame structure, and a lifting shaft system driving the lifting platform to rise and fall along the frame structure;

[0009] The flexible docking assembly includes a supporting base plate and a flexible plate flexibly mounted above the supporting base plate through multiple groups of flexible structures; the lower flange is fixedly mounted on the flexible plate.

[0010] In the above technical solution, the supporting base plate and the flexible plate are flexibly installed via 10 groups of the flexible structures; and the 10 groups of the flexible structures are evenly distributed.

[0011] In the above technical solution, each group of the flexible structure includes a first disc spring group, a first fixing pin, a second disc spring group and a second fixing pin;

[0012] The first disc spring assembly is sleeved on the first fixing pin; the second disc spring assembly is sleeved on the second fixing pin; the lower end of the first fixing pin is fixed to the supporting base plate, the upper end passes through the flexible plate and a flexible gap exists between the first fixing pin and the flexible plate; the upper end of the second fixing pin is fixed to the flexible plate, the lower end extends into the supporting base plate and a flexible gap exists between the first fixing pin and the flexible plate.

[0013] In the above technical solution, the lifting platform is divided into two parts; each part includes a horizontal platform and a vertical support plate.

[0014] In the above technical solution, a rough positioning pin and a fine positioning male seat are provided below the supporting bottom plate;

[0015] A coarse positioning hole matched with the coarse positioning pin and a fine positioning female seat matched with the fine positioning male seat are installed on each of the horizontal platforms.

[0016] In the above technical solution, the frame structure includes four vertical support rods and guide rails installed on the inner sides of the support rods.

[0017] In the above technical solution, a sliding block is installed on the outer side of each vertical support plate; the sliding block slides up and down along the guide rail.

[0018] In the above technical solution, the lifting shaft system includes a motor, a reducer, two commutators, two lead screws and two dynamic lock nuts;

[0019] The output shafts at both ends of the reducer are connected to the commutator respectively; the bottom end of the lead screw is connected to the output shaft of the commutator; one side of the dynamic lock nut is sleeved on the lead screw; and the other side is fixed on the lifting platform.

[0020] In the above technical solution, the output shafts at both ends of the reducer are connected to the commutator via a connecting shaft respectively.

[0021] In the above technical solution, the top end of the lead screw is rotatably mounted on the frame structure via a fixed bearing; the lower end of the lead screw is rotatably mounted on the frame structure via a nut.

[0022] In the above technical solution, the bottom end of the lead screw is connected to the output shaft of the commutator through a coupling.

[0023] In the above technical solution, the upper end of the fixed upper flange is welded to the container.

[0024] In the above technical solution, a rubber ring and a positioning pin are provided on the lower surface of the fixed upper flange.

[0025] Another aspect of the present invention is a docking method of the above container welding flange flexible docking device,

[0026] First, the flexible docking assembly is positioned and installed on the lifting platform;

[0027] Then, the lifting shaft system starts, driving the lifting platform to rise until the fixed upper flange and the lower flange are precisely butted together;

[0028] Finally, under the action of the flexible structure, the lower flange adjusts its posture according to the horizontality of the lower surface of the fixed upper flange to achieve the butt sealing of the welded flange.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The flexible docking device for container welding flanges provided by the present invention can adjust the deviation of the lower flange in all directions through the flexible docking assembly under the action of multiple groups of flexible structures, so as to better adapt to the fixed upper flange after welding. It ensures the tight fit between the fixed upper flange and the lower flange, so that the container meets the sealing requirements.

[0031] 2. The flexible docking device for welding flanges of containers provided by the present invention ensures high-precision positioning of the fixed upper flange and the lower flange in the vertical direction through precise positioning between the flexible docking assembly and the lifting platform and the use of a screw mechanism with high lifting accuracy. The positioning pin under the fixed upper flange is precisely docked with the hole on the lower flange.

[0032] 3. The docking method of the flexible docking device for the container welding flange provided by the present invention can comprehensively realize the docking sealing of the welding flange by combining the high-precision positioning of the shaft system and the flexible adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure shows the overall structure schematic diagram of the flexible docking device of the container welding flange;

[0034] Figure 2 The figure shows the structural schematic diagram of the fixed upper flange;

[0035] Figure 3 Shown is a schematic structural diagram of a flexible docking assembly;

[0036] Figure 4 Shown is a schematic cross-sectional structure diagram of a flexible docking assembly;

[0037] Figure 5 The figure shows the structural schematic diagram of the lifting shaft system;

[0038] Figure 6 Shown is a schematic diagram of the structure of the lifting platform.

[0039] In the figure: 1-fixed upper flange, 2-lower flange, 3-lifting platform, 3-1-horizontal platform, 3-2-vertical support plate, 4-support bottom plate, 5-flexible plate, 6-first disc spring group, 7-first fixing pin, 8-second disc spring group, 9-second fixing pin, 10-rough positioning pin, 11-fine positioning male seat, 12-rough positioning hole, 13-fine positioning female seat, 14-slider, 15-support rod, 16-motor, 17-reducer, 18-commutator, 19-nut seat, 20-screw, 21-dynamic lock nut, 22-connecting shaft, 23-fixed bearing, 24-coupling, 25-container, 26-rubber ring, 27-locating pin, 28-guide rail. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. 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.

[0041] Example 1

[0042] A flexible butt joint device for welding flanges of containers, such as Figure 1 As shown, it includes a fixed upper flange 1, a flexible docking assembly fixedly equipped with a lower flange 2, a lifting platform 3, a lifting shaft system and a frame structure for driving the lifting platform 3 to rise and fall. The flexible docking assembly is positioned and installed on the lifting platform 3. The lifting platform 3 is lifted and lowered along the frame structure under the drive of the lifting shaft system; when the lifting platform 3 rises to a specified height, the lower flange 2 and the upper flange 1 are flexibly docked.

[0043] The fixed upper flange 1 is as Figure 2 As shown, its upper end is welded to the container 25, and its lower surface is provided with a rubber ring 26 and a positioning pin 27. Due to the welding between the fixed upper flange 1 and the container 25, welding deviation is inevitable, and the horizontality of the lower surface of the fixed upper flange 1 cannot be guaranteed. Therefore, the lower flange 2 needs to be adjusted according to the horizontality of the lower surface of the fixed upper flange 1 to ensure the tight fit between the fixed upper flange 1 and the lower flange 2, so that the container meets the sealing requirements.

[0044] The flexible docking assembly is as follows Figure 3 As shown, it includes a supporting base plate 4 and a flexible plate 5 flexibly installed above the supporting base plate 4; the lower flange 2 is fixedly installed on the flexible plate 5 by bolts; the supporting base plate 4 and the flexible plate 5 are flexibly connected by multiple groups of flexible structures, so that the lower flange 2 can adjust its posture according to the horizontality of the lower surface of the fixed upper flange 1.

[0045] Specifically, each group of the flexible structures is as follows Figure 4As shown, it includes a first disc spring group 6, a first fixing pin 7, a second disc spring group 8 and a second fixing pin 9. The first disc spring group 6 is sleeved on the first fixing pin 7; the second disc spring group 8 is sleeved on the second fixing pin 9; the first disc spring group 6 and the second disc spring group 8 are both located between the support base plate 4 and the flexible plate 5, realizing flexible adjustment of the support base plate 4 and the flexible plate 5 in the height direction. The lower end of the first fixing pin 7 is fixed to the support base plate 4 by threads, and the upper end passes through the flexible plate 5 and there is a flexible gap D between the flexible plate 5. The upper end of the second fixing pin 9 is fixed to the flexible plate 5 by threads, and the lower end extends into the support base plate 4 and there is a flexible gap D between the support base plate 4. The first fixing pin 7 and the second fixing pin 9 realize flexible adjustment of the support base plate 4 and the flexible plate 5 in the horizontal direction.

[0046] Example 2

[0047] This embodiment is based on the first embodiment and introduces the high-precision positioning of the fixed upper flange 1 and the lower flange 2 in the vertical direction.

[0048] The high-precision positioning of the fixed upper flange 1 and the lower flange 2 in the vertical direction mainly includes two aspects. One is the precise positioning between the flexible docking assembly and the lifting platform 3; the other is that the lifting axis system adopts a screw mechanism with high lifting accuracy.

[0049] The precise positioning between the flexible docking assembly and the lifting platform 3 is achieved through the following structure.

[0050] Two rough positioning pins 10 and four fine positioning male seats 11 are arranged below the support base plate 4. Figure 6 As shown, the lifting platform 3 is divided into two parts; each part includes a horizontal platform 3-1 and a vertical support plate 3-2. A coarse positioning hole 12 and two fine positioning female seats 13 are installed on each horizontal platform 3-1. The positions of the two coarse positioning pins 10 correspond to the positions of the two coarse positioning holes 12, so as to achieve the coarse positioning installation between the support base plate 4 and the lifting platform 3. The positions of the four fine positioning male seats 11 correspond to the positions of the four fine positioning female seats 13, so as to achieve the precise positioning installation between the support base plate 4 and the lifting platform 3.

[0051] The precise positioning between the flexible docking assembly and the lifting platform 3 can facilitate the online maintenance or replacement of the corresponding components (the lower flange 2 and the flexible docking assembly).

[0052] The lifting shaft system drives the lifting platform 3 to move up and down along the frame structure and maintain high axial precision, which is achieved through the following structure.

[0053] The frame structure includes four vertical support rods 15 and guide rails 28 installed inside the support rods 15 and other frame reinforcement structures. The other frame reinforcement structures are commonly used reinforcement beams or reinforcement rods, etc., which belong to conventional technical means in this field and are not described here. Slide blocks 14 are respectively installed at both ends of the outer side of each vertical support plate 3-2; the slide blocks 14 slide up and down along the guide rails 15.

[0054] The lifting shaft system is as follows Figure 5 As shown, it includes a motor 16, a reducer 17, two commutators 18, two lead screws 20 and two dynamic lock nuts 21. The output shafts at both ends of the reducer 17 are connected to the commutator 18 through a connecting shaft 22 respectively. The commutator 18 converts the horizontal axis rotation output by the reducer 17 into a vertical axis rotation. The bottom end of each lead screw 20 is connected to the output shaft of the commutator 18 through a coupling 24. One side of the dynamic lock nut 21 is sleeved on the lead screw 20; the other side is fixed on the vertical support plate 3-2. In order to ensure the stability of the lead screw 20, the top end of the lead screw 20 is rotatably mounted on the frame structure through a fixed bearing 23; the lower end of the lead screw 20 is rotatably mounted on the frame structure through a nut seat 19 (whose structure and function are the same as those of the fixed bearing 23).

[0055] The motor 16 drives the reducer 17, and the horizontal axial rotation is transmitted to the commutators 18 on both sides and then converted into vertical axial rotation, which in turn drives the two lead screws 20 to rotate, and drives the lifting platform 3 to rise and fall through the dynamic lock nut 21. The axial positioning accuracy of the lifting shaft system is high. When the lower flange 2 is close to the fixed upper flange 1, due to the high-precision positioning of the shaft system, the positioning pin 27 below the fixed upper flange 1 can be accurately docked with the hole on the lower flange 2, and the gap between the two is ≤0.5mm.

[0056] After the positioning pin 27 enters the hole, the multiple sets of flexible structures can adjust the deviations of the lower flange 2 in all directions, so as to better adapt to the fixed upper flange 1 after welding. By combining high-precision positioning of the shaft system and flexible adjustment, the butt sealing of the welded flange can be comprehensively realized.

[0057] Example 3

[0058] This embodiment introduces the docking method based on Embodiments 1 and 2.

[0059] First, the flexible docking assembly is positioned and installed on the lifting platform 3 with the help of tools such as a forklift. Then, the lifting shaft system is started to drive the lifting platform 3 to rise until the fixed upper flange 1 and the lower flange 2 are accurately docked. Finally, under the action of the flexible structure, the lower flange 2 adjusts its posture according to the horizontality of the lower surface of the fixed upper flange 1 to achieve the docking seal of the welding flange.

[0060] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0061] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A flexible docking device for container welding flanges, characterized in that: It includes a fixed upper flange, a flexible docking assembly fixedly equipped with a lower flange, a lifting platform positioned and installed with the flexible docking assembly, a frame structure, and a lifting shaft system driving the lifting platform to rise and fall along the frame structure; The flexible docking assembly includes a supporting base plate and a flexible plate flexibly mounted on the supporting base plate through multiple sets of flexible structures; the lower flange is fixedly mounted on the flexible plate; Each group of the flexible structures includes a first disc spring group, a first fixing pin, a second disc spring group and a second fixing pin; The first disc spring assembly is sleeved on the first fixing pin; the second disc spring assembly is sleeved on the second fixing pin; the lower end of the first fixing pin is fixed to the supporting bottom plate, and the upper end passes through the flexible plate and a flexible gap exists between the flexible plate; the upper end of the second fixing pin is fixed to the flexible plate, and the lower end extends into the supporting bottom plate and a flexible gap exists between the supporting bottom plate; The lifting platform is divided into two parts; each part includes a horizontal platform and a vertical support plate; A coarse positioning pin and a fine positioning male seat are arranged below the supporting bottom plate; A coarse positioning hole matched with the coarse positioning pin and a fine positioning female seat matched with the fine positioning male seat are installed on each of the horizontal platforms.

2. The container welding flange flexible docking device according to claim 1, characterized in that: The supporting base plate and the flexible plate are flexibly installed via 10 groups of the flexible structures; the 10 groups of the flexible structures are evenly distributed.

3. The container welding flange flexible docking device according to claim 1, characterized in that: The frame structure includes four vertical support rods and guide rails installed inside the support rods.

4. The container welding flange flexible docking device according to claim 3, characterized in that: A sliding block is installed on the outer side of each vertical supporting plate; the sliding block slides up and down along the guide rail.

5. The container welding flange flexible docking device according to claim 1, characterized in that: The lifting shaft system includes a motor, a reducer, two commutators, two lead screws and two dynamic lock nuts; The output shafts at both ends of the reducer are respectively connected to the commutator; the bottom end of the lead screw is connected to the output shaft of the commutator; one side of the dynamic lock nut is sleeved on the lead screw; The other side is fixed on the lifting platform.

6. The container welding flange flexible docking device according to claim 5, characterized in that: The output shafts at both ends of the reducer are connected to the commutator via a connecting shaft respectively.

7. The container welding flange flexible docking device according to claim 6, characterized in that: The top end of the lead screw is rotatably mounted on the frame structure via a fixed bearing; the lower end of the lead screw is rotatably mounted on the frame structure via a nut seat.

8. The container welding flange flexible docking device according to claim 7, characterized in that: The bottom end of the lead screw is connected to the output shaft of the commutator through a coupling.

9. The container welding flange flexible docking device according to claim 1, characterized in that: The upper end of the fixed upper flange is welded on the container.

10. The container welding flange flexible docking device according to claim 9, characterized in that: The lower surface of the fixed upper flange is provided with a rubber ring and a positioning pin.

11. The method for docking a container welding flange flexible docking device according to any one of claims 1 to 10, characterized in that: First, the flexible docking assembly is positioned and installed on the lifting platform; Then, the lifting shaft system starts, driving the lifting platform to rise until the fixed upper flange and the lower flange are precisely butted together; Finally, under the action of the flexible structure, the lower flange adjusts its posture according to the horizontality of the lower surface of the fixed upper flange to achieve the butt sealing of the welded flange.

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