CN115055905A - Welding tool for centrifugal fan support - Google Patents

Abstract

The invention provides a welding tool for a bracket of a centrifugal fan, belonging to the technical field of centrifugal fans. It solves the technical problems of low precision after welding of the existing centrifugal fan bracket. The base of the welding tool of the centrifugal fan support is provided with a positioning device for fixing the flange or the screw rod, the top plate for placing the installation panel is fixedly connected to the upper part of the column, and the top plate is provided for pressing and fixing the elbow to the installation panel. Both ends of the pressure plate are provided with elbow welding holes, and the middle of the elbow is located below the elbow welding holes. The welding tool can firstly locate the elbow, installation panel, flange or screw of the centrifugal fan bracket, and then perform welding. Through the auxiliary positioning of the welding tool, the symmetry and accuracy of the positioned centrifugal fan bracket can be improved. It can also effectively avoid the displacement between the various parts of the centrifugal fan bracket during the welding process, thereby further improving the welding accuracy.

Description

Welding tool for centrifugal fan support

technical field

The invention belongs to the technical field of centrifugal fans, and particularly relates to a welding tool for a bracket of a centrifugal fan.

Background technique

Centrifugal fans are widely used in ventilation, refrigeration and other industries. When the centrifugal fan is working, the motor drives the wind wheel to rotate at a high speed, which will generate a large centrifugal force. The application products have higher requirements on the dynamic balance of the fan. It may cause great vibration and damage the fan and other related equipment; therefore, when installing a centrifugal fan, the motor of the centrifugal fan is generally first installed on the bracket, and the bracket is fixedly connected to the bottom plate, and then the wind wheel is connected to the motor. An air collecting hood is provided, and the inner end of the air collecting hood is connected with the air inlet of the wind wheel.

At present, a new type of centrifugal fan bracket has appeared on the market. The bracket includes two elbows and a mounting panel. The middle of the mounting panel is provided with a motor hole for the motor to pass through and a motor mounting hole for fixing the motor. The left and right sides of the panel are bent upward to form the connecting edge, the two ends of the elbow are bent downward to form a support part, the lower end of each support part is fixedly connected with a flange or a screw, and the middle part of the elbow is a connecting part, which connects The connecting part is placed on the upper side of the installation panel and the upper side of the connecting edge is in contact with the outer side of the connecting part; preferably, the connecting part is bent inwardly in an arc shape, and the left and right sides of the installation panel are also in the shape of the connecting part. Matching arc shape. The above-mentioned elbows, installation panels and flanges are all welded and fixed. The above-mentioned brackets have the advantages of high strength, light weight, small wind resistance, compact structure, convenient installation, and a protective net can be installed on the outside, and the safety is high.

However, due to the special structure of the elbow, if there is no positioning before welding, the installation angle of the two elbows and the installation panel may deviate after welding, resulting in that the supporting parts of the elbows are not parallel to each other, and the undersides of the four flanges They are not located in the same plane. These deviations will affect the dynamic balance of the fan, resulting in relatively large vibration when the centrifugal fan is working, affecting the stability and safety of the centrifugal fan when it is working.

Therefore, how to provide a welding tool for a bracket of a centrifugal fan, so that the accuracy of the bracket of the centrifugal fan after welding is higher, has become a technical problem that needs to be solved urgently.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a welding tool which can improve the welding precision of the centrifugal fan support.

The object of the present invention can be realized through the following technical solutions:

A welding tool for a bracket of a centrifugal fan is characterized in that: it comprises a base and a column arranged in the middle of the base,

Four positioning devices are fixedly connected to the base, each positioning device is detachably connected to the flange or screw at the lower end of the corresponding support portion, and the positioning device is fixedly connected to the base;

The upper part of the column is fixedly connected with a top plate for placing the installation panel, the top plate is parallel to the upper side of the base, and a pressure plate is arranged above the top plate for pressing and fixing the elbow on the installation panel, and the pressure plate is connected There is a pressing plate driving member that drives the pressing plate to move up and down, both ends of the pressing plate are provided with elbow welding holes, and the middle part of the elbow is located below the elbow welding holes.

The welding tool can fix the installation panel and two elbows of the centrifugal fan support first, and then perform welding, which can make the welded centrifugal fan support more precise; the top plate can support and fix the installation panel. When assembling, first place the elbow on the installation panel and make the connection part of the elbow and the connection edge of the installation panel closely abut, and then use the positioning device to locate and fix the flange or screw installed at the lower end of the support part, adjust The position of the elbow is so that the two elbows are arranged symmetrically on the left and right, so that the assembled centrifugal fan bracket is symmetrical in the front and back, and then the pressure plate is driven down by the pressure plate driver, so that the pressure plate presses and fixes the elbow and the installation panel, and then manually or The connection between the elbow and the installation panel and the connection between the elbow and the flange or screw are welded and fixed mechanically; the design of this welding tool can make the symmetry of the assembled centrifugal fan support better, and can avoid bending during the welding process. There is displacement between the pipe and the installation panel, and the lower sides of the four flanges can also be on the same horizontal plane or the four screws can be parallel to each other, which can effectively increase the accuracy of the centrifugal fan bracket after welding, and is conducive to improving the dynamic performance of the fan after installation. balance.

In the above-mentioned welding tool for a bracket of a centrifugal fan, the base is provided with four welding windows that penetrate the base up and down, and the positioning device is arranged above the corresponding welding window, and the positioning device includes a positioning block and a bolt , the middle of the positioning block is provided with a flange welding hole coaxial with the flange hole of the flange, the diameter of the flange welding hole is larger than the diameter of the flange hole, and the flange welding hole is located directly above the welding window , the upper side of the positioning block is fixedly connected with a flange positioning pin that cooperates with the connecting hole of the flange, the flange positioning pin can be inserted into the connecting hole of the flange, and the positioning block and the base are fixedly connected by bolts .

The flange of the centrifugal fan support is in the shape of a disc, the middle of the flange is provided with a flange hole connected with the elbow, and the upper side of the flange is provided with at least two connection holes that penetrate the flange up and down. The connecting holes are arranged in an annular array with the central axis of the flange as the center;

In actual work, the welding tool will be fixed on a reversible platform. When the flange and elbow need to be welded and fixed, the welding tool can be turned over, and then the welding torch will pass through the welding window and the flange welding hole to the flange and the flange. The connection of the support part is welded and fixed, and welding is more convenient and quick; the above-mentioned flange positioning pin can be inserted into the connecting hole of the flange and position the flange, so as to avoid the rotation of the flange during the welding process, thereby improving the welding accuracy.

In the above-mentioned welding tool for a bracket of a centrifugal fan, the welding window is in the shape of a long strip, and a number of block positioning holes are arranged at intervals along the length direction of the welding window on both sides of the welding window. There are block mounting holes matched with the block positioning holes, and the bolts can pass through the block mounting holes and the block positioning holes.

The strip-shaped welding window and the spaced block positioning holes enable the welding tool to adapt to more types of centrifugal fan brackets, and the position of the positioning holes in the length direction of the welding window can be adjusted according to the size of the centrifugal fan bracket.

In the above-mentioned welding tool for a bracket of a centrifugal fan, four flange pressing devices are provided on the base, and the flange pressing devices include a pressing driver, a positioning rod, an adjusting rod, a clamping pliers and A pressing rod, the upper end of the positioning rod is rotatably connected with one end of the clamping pliers, the lower end of the positioning rod is fixedly connected with the base, and one end of the adjusting rod is rotatably connected with the clamping pliers, and the The other end is connected with the pressing driver, which can drive the adjusting rod to move up and down and drive the clamping pliers to rotate around the upper end of the positioning rod. The pressing rod is fixedly connected to both sides of the arc-shaped groove, and the adjusting rod is installed between the pressing rod and the positioning rod and is located near the end of the positioning rod.

The above-mentioned flange pressing device can press and fix the flange on the positioning block, so as to prevent the flange from shaking in the axial direction when the welding tool is turned over, so as to ensure that the lower sides of the four flanges are all on the same plane, which is conducive to improving the performance of the flange. The welding accuracy of the welding tool; the rotatable structure of the above-mentioned flange pressing device can avoid the interference of the flange pressing device during the installation and disassembly of the centrifugal fan support, making the installation and disassembly more convenient; the design of the arc groove can avoid the flange pressure The tightening device interferes with the elbow when pressing the flange.

In the above-mentioned welding tool for a bracket of a centrifugal fan, the central axes of the two oppositely arranged welding windows are coincident, and the clamping tongs, the positioning rod and the adjusting rod are all arranged on the central axes of the corresponding two welding windows, The clamping pliers include a connecting plate and an adjusting plate, the inner ends of the connecting plate are rotatably connected with the positioning rod and the adjusting rod respectively, the adjusting plate is movably installed on the outer end of the connecting plate, and the arc-shaped Both the groove and the pressing rod are arranged on the outer end of the adjusting plate.

The design that the above-mentioned clamping pliers, positioning rods and adjusting rods are all arranged on the central axis of the corresponding two welding windows can facilitate the clamping pliers to adjust the positional relationship between the adjusting plate and the connecting plate according to the size of the centrifugal fan support, and adjust the positional relationship between the adjusting plate and the connecting plate. It is more convenient and beneficial to improve the adaptability of the welding tool.

In the above-mentioned welding tool for a bracket of a centrifugal fan, the positioning device includes a positioning block, a screw positioning hole and a bolt. The block and the base are fixedly connected by bolts.

The screw of the centrifugal fan support includes a threaded part and a welded part, the welded part can be inserted into the end of the elbow, the end of the elbow is provided with a number of welding ports at intervals along the circumferential direction, and the diameter of the threaded part is smaller than the diameter of the welded part The diameter of the screw positioning hole can make the positioning device more suitable for the centrifugal fan bracket with screw structure.

In the above-mentioned welding tool for a bracket of a centrifugal fan, at least two positioning grooves or at least two positioning posts are provided on the upper end surface of the top plate, and the positioning grooves are correspondingly arranged with the motor mounting holes of the mounting panel, and the The positioning slot is connected to the installation panel through a positioning pin passing through the motor installation hole; the positioning column can pass through the motor installation hole of the installation panel.

This welding tool locates the installation panel through the matching of the positioning groove and the positioning pin or the positioning column, so as to prevent the installation panel from moving relative to the top plate on the plane parallel to the top plate, which is beneficial to improve the welding accuracy; further, when the positioning groove or the positioning column When there are only two, the two positioning grooves or two positioning columns are symmetrically arranged.

In the above-mentioned welding tool for a centrifugal fan support, the upright column includes a coaxially arranged base, an adjustment part and an installation part, the lower end of the base is fixedly connected with the base, and the upper part of the base is connected with the adjustment part The lower part of the adjusting part is threadedly connected, an adjusting handle is fixed on the outer side wall of the adjusting part, the mounting part is fixedly connected with the upper end of the adjusting part, and the diameter of the mounting part is smaller than that of the adjusting part; the lower side of the top plate is fixed with a A guide column, the top plate is provided with a guide hole penetrating the top plate and the guide column, the mounting part passes through the guide hole, and a plane bearing is connected between the lower end surface of the guide column and the upper end surface of the adjusting part.

The adjustment part and the base are screwed together, and the adjustment handle drives the adjustment part to rotate relative to the base, so as to adjust the height of the adjustment part, so that the welding tool can adjust the distance between the top plate and the base by adjusting the height of the adjustment part. The welding tool can be adapted to more types of centrifugal fan brackets, which is beneficial to improve the adaptability of the welding tool.

In the above-mentioned welding tool for a bracket of a centrifugal fan, the pressure plate driving member is a cylinder, a driving member mounting plate is arranged under the top plate, and the pressure plate driving member is fixedly connected to both ends of the driving member installation plate. The driving rod of the pressing plate driving member passes through the driving member mounting plate and is fixedly connected with the lower end surface of the top plate. The upper part of the mounting part is sleeved with a pulling plate, and at least two rods pass between the pulling plate and the driving member installation plate. The pull rod is fixedly connected, the pull rod passes through the top plate and can move relative to the top plate, the lower end face of the pull plate abuts against the upper end face of the pressing plate and can drive the pressing plate to move down.

The pressing plate driving part and the driving part mounting plate of the welding tool are located on the lower side of the top plate, which can make the overall center of gravity of the welding tool lower, which is beneficial to improve the overall stability of the welding tool when it is turned over, thereby further improving the welding accuracy; The tooling drives the drive member mounting plate down through two symmetrically arranged cylinders, and then the drive member mounting plate drives the pull plate fixedly connected with the pull rod to move down synchronously. The panel is pressed and fixed, the structure is simple, the operation is convenient, and the stability is high.

In the above-mentioned welding tool for a bracket of a centrifugal fan, the pressing plate is in the shape of a long strip, the welding holes of the elbows are respectively provided at both ends of the pressing plate, and the middle part of the pressing plate is provided with a hole for the mounting part and the tie rod to pass through. A through hole, the width B1 of the elbow welding hole is greater than the width B2 of the through hole, one end of one elbow welding hole is communicated with the through hole, and the other end is open.

One end of the above-mentioned elbow welding hole is connected to the through hole, and the other end is open to facilitate the welding tool to replace the corresponding pressure plate according to the model of the centrifugal fan bracket, and further, the design of the outer opening of the elbow welding hole is more convenient for welding. .

Compared with the prior art, the technical effect of the present invention is:

The welding tool can firstly position the elbow, installation panel and flange or screw of the centrifugal fan support, and then perform welding. Through the auxiliary positioning of the welding tool, the symmetry and precision of the positioned centrifugal fan support can be improved. higher, so that the installed centrifugal fan has better dynamic balance; at the same time, the method of positioning first and then welding can effectively avoid the displacement between the various parts of the centrifugal fan bracket during the welding process, thereby further improving the welding accuracy.

Description of drawings

FIG. 1 is a perspective view of the present invention after installing the centrifugal fan support.

Fig. 2 is a perspective view of the present invention.

Figure 3 is a right side view of the present invention.

FIG. 4 is a schematic diagram of the connection structure of the column and the top plate of the present invention.

FIG. 5 is a schematic diagram of the exploded structure of the column and the top plate of the present invention.

FIG. 6 is a schematic structural diagram of the top plate and the positioning pin of the present invention.

FIG. 7 is a schematic structural diagram of the flange pressing device and the positioning device of the present invention.

FIG. 8 is a schematic structural diagram of the welding window of the present invention.

FIG. 9 is a schematic view of the structure of the pressing plate of the present invention.

10 is a schematic structural diagram of the centrifugal fan support of the present invention.

FIG. 11 is a schematic structural diagram of the welding position of the installation panel and the elbow of the present invention.

12 is a schematic structural diagram of the flange of the centrifugal fan support of the present invention.

13 is a partial cross-sectional view of the connection between the elbow and the screw of the centrifugal fan support of the present invention.

In the figure, 1, base; 11, welding window; 12, block positioning hole; 2, column; 21, base; 22, adjustment part; 221, adjustment handle; 23, installation part; 3, positioning device; 31, positioning Block; 311, flange welding hole; 312, flange positioning pin; 313, block mounting hole; 32, bolt; 33, screw positioning hole; 4, flange pressing device; 41, pressing driver; 42, positioning Rod; 43. Adjusting rod; 44. Clamping pliers; 441, Connecting plate; 442, Adjusting plate; , positioning pin; 54, guide column; 55, guide hole; 6, pressure plate; 61, elbow welding hole; 62, through hole; 7, pressure plate driver; 71, driver installation plate; 72, pull plate; 73, Pull rod; 8, plane bearing; 9, centrifugal fan bracket; 91, installation panel; 911, motor hole; 912, motor installation hole; 913, connecting edge; 92, elbow; 921, connecting part; 922, supporting part; 923, welding port; 93, flange; 931, flange hole; 932, connecting hole; 94, screw; 941, thread part; 942, welding part; 95, welding seam.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

The welding tool of the centrifugal fan support includes a base 1 and a column 2 arranged in the middle of the base 1. Four positioning devices 3 are fixedly connected to the base 1, and each positioning device 3 is connected to the flange 93 or the screw at the lower end of the corresponding support portion 922. 94 is detachably connected, and the positioning device 3 is fixedly connected with the base 1; the upper part of the column 2 is fixedly connected with a top plate 5 for placing the installation panel 91, the top plate 5 is parallel to the upper side of the base 1, and the top plate 5 is provided with a curved pipe. 92 presses the pressure plate 6 fixed on the installation panel 91, the pressure plate 6 is connected with the pressure plate driver 7 that drives the pressure plate 6 to move up and down, the two ends of the pressure plate 6 are provided with elbow welding holes 61, and the middle of the elbow 92 is located in the elbow Below the welding hole 61 . The welding tool can fix the installation panel 91 and the two elbows 92 of the centrifugal fan support 9 first, and then perform welding, which can make the welded centrifugal fan support 9 more precise; the top plate 5 can lift the installation panel 91 For the function of support and fixation, when assembling, first place the elbow 92 on the installation panel 91 and make the connecting part 921 of the elbow 92 and the connecting edge 913 of the installation panel 91 abut closely, and then pass the positioning device 3 to the supporting part. The flange 93 or the screw 94 installed at the lower end of the 922 is positioned and fixed, and the position of the elbow 92 is adjusted so that the two elbows 92 are arranged symmetrically on the left and right sides, so that the assembled centrifugal fan support 9 is symmetrical in the front and rear, and then driven by the platen driver 7 The pressure plate 6 is moved down, so that the pressure plate 6 presses and fixes the elbow 92 and the installation panel 91, and then manually or mechanically adjusts the connection between the elbow 92 and the installation panel 91 and the connection between the elbow 92 and the flange 93 or the screw 94. Welding and fixing; the design of the welding tool can make the symmetry of the assembled centrifugal fan support 9 better, can avoid the displacement between the elbow 92 and the installation panel 91 during the welding process, and can also be the four flanges 93. The lower side is on the same horizontal plane or the four screws 94 are parallel to each other, which can effectively increase the precision of the centrifugal fan bracket 9 after welding, and is beneficial to improve the dynamic balance of the fan after installation. The stripe in FIG. 11 is the weld 95 of the elbow 92 and the mounting panel 91 .

As shown in FIG. 1 , FIG. 2 and FIG. 8 , the base 1 is provided with four welding windows 11 penetrating the base 1 up and down, the positioning device 3 is arranged above the corresponding welding window 11 , and the positioning device 3 includes a positioning block 31 and a bolt 32. The middle of the positioning block 31 is provided with a flange welding hole 311 coaxial with the flange hole 931 of the flange 93. The diameter of the flange welding hole 311 is larger than the diameter of the flange hole 931, and the flange welding hole 311 is located in the welding window. Right above 11, the upper side of the positioning block 31 is fixedly connected with a flange positioning pin 312 that cooperates with the connecting hole 932 of the flange 93. The flange positioning pin 312 can be inserted into the connecting hole 932 of the flange 93, and the positioning block 31 is connected to the flange 93. The base 1 is fixedly connected by bolts 32; the welding window 11 is in the shape of a long strip, and a number of block positioning holes 12 are arranged on both sides of the welding window 11 along the length direction of the welding window 11 at intervals, and the positioning block 31 is provided with the block positioning holes 12 With the matched block mounting holes 313 , the bolts 32 can pass through the block mounting holes 313 and the block positioning holes 12 .

The flange 93 of the centrifugal fan support 9 is in the shape of a disc, the middle of the flange 93 is provided with a flange hole 931 connected with the elbow 92, and the upper side of the flange 93 is provided with at least two holes penetrating the flange 93 up and down. Connecting holes 932, the connecting holes 932 are arranged in a circular array with the center axis of the flange 93 as the center; during actual work, the welding tool will be fixed on a reversible platform, and the flange 93 and the elbow 92 need to be welded and fixed. , the welding tool can be turned over, and then the welding torch is passed through the welding window 11 and the flange welding hole 311 to weld and fix the connection between the flange 93 and the support part 922, and the welding is more convenient and fast; the above-mentioned flange positioning pin 312 can be inserted in the method The flange 93 is positioned in the connecting hole 932 of the flange 93 to prevent the flange 93 from rotating during the welding process, thereby improving the welding accuracy; the strip-shaped welding window 11 and the spaced block positioning holes 12 make the welding tool suitable for use. With more models of centrifugal fan brackets 9 , the position of the positioning hole in the length direction of the welding window 11 can be adjusted according to the size of the centrifugal fan bracket 9 .

As shown in Figures 1-3 and 7, the base 1 is provided with four flange pressing devices 4. The flange pressing device 4 includes a pressing driving member 41, a positioning rod 42, an adjusting rod 43, and a clamping pliers 44. and the pressing rod 45, the upper end of the positioning rod 42 is rotatably connected with one end of the clamping pliers 44, the lower end of the positioning rod 42 is fixedly connected with the base 1, one end of the adjusting rod 43 is rotatably connected with the clamping pliers 44, and the adjusting rod 43 The other end is connected with the pressing driving member 41. The pressing driving member 41 can drive the adjusting rod 43 to move up and down and drive the clamping pliers 44 to rotate around the upper end of the positioning rod 42. The other end of the clamping pliers 44 is provided with a bend pipe 92 The matching arc groove 443, the pressing rod 45 is fixedly connected to both sides of the arc groove 443, and the adjusting rod 43 is installed between the pressing rod 45 and the positioning rod 42 and is located near the end of the positioning rod 42; The central axes of the two welding windows 11 are coincident, and the clamping pliers 44, the positioning rod 42 and the adjusting rod 43 are all arranged on the central axes of the corresponding two welding windows 11. The clamping pliers 44 include a connecting plate 441 and an adjusting plate 442. The inner end of the connecting plate 441 is rotatably connected with the positioning rod 42 and the adjusting rod 43 respectively. The adjusting plate 442 is movably installed on the outer end of the connecting plate 441 , and the arc groove 443 and the pressing rod 45 are both arranged on the adjusting plate 442 the outer end.

The above-mentioned flange pressing device 4 can press and fix the flange 93 on the positioning block 31 to prevent the flange 93 from shaking axially when the welding tool is turned over, thereby ensuring that the lower sides of the four flanges 93 are located on the same plane. It is beneficial to improve the welding accuracy of the welding tool; the rotatable structure of the above-mentioned flange pressing device 4 can avoid the interference of the flange pressing device 4 when the centrifugal fan bracket 9 is mounted and unloaded, making the loading and unloading more convenient; the arc-shaped The design of the groove 443 can prevent the flange pressing device 4 from colliding with the elbow 92 when pressing the flange 93; The design on the axis facilitates that the clamping pliers 44 can adjust the positional relationship between the adjusting plate 442 and the connecting plate 441 according to the size of the centrifugal fan support 9 , which makes the adjustment more convenient and helps to improve the adaptability of the welding tool.

As another solution, the positioning device 3 includes a positioning block 31 , a screw positioning hole 33 and a bolt 32 . The middle of the positioning block 31 is provided with a screw positioning hole 33 for the threaded portion 941 of the screw 94 to pass through. The positioning block 31 and the base 1 The connection is fixed by means of bolts 32 . The screw 94 of the centrifugal fan support 9 includes a threaded portion 941 and a welded portion 942. The welded portion 942 can be inserted into the end of the elbow 92. The end of the elbow 92 is provided with a number of welding ports 923 at intervals along the circumferential direction. The threaded portion 941 The diameter of the screw is smaller than the diameter of the welding part 942; the design of the screw positioning hole 33 can make the positioning device 3 more suitable for the centrifugal fan support 9 with the screw 94 structure.

As shown in FIGS. 4-6 , at least two positioning slots 51 or at least two positioning posts 52 are provided on the upper end surface of the top plate 5 . The positioning slots 51 are correspondingly arranged with the motor mounting holes 912 of the mounting panel 91 , and the positioning slots 51 pass through The positioning pins 53 passing through the motor mounting holes 912 are connected to the mounting panel 91 ; the positioning posts 52 can pass through the motor mounting holes 912 of the mounting panel 91 . This welding tool locates the mounting panel 91 through the matching of the positioning groove 51 and the positioning pin 53 or the positioning column 52, so as to prevent the mounting panel 91 from moving relative to the top plate 5 on a plane parallel to the top plate 5, which is beneficial to improve the welding accuracy; further , when there are only two positioning slots 51 or two positioning columns 52, the two positioning slots 51 or two positioning columns 52 are symmetrically arranged.

As shown in FIGS. 1-5 , the upright column 2 includes a base 21 , an adjustment part 22 and a mounting part 23 arranged coaxially. Connection, the outer side wall of the adjustment part 22 is fixed with an adjustment handle 221, the installation part 23 is fixedly connected with the upper end of the adjustment part 22, the diameter of the installation part 23 is smaller than the diameter of the adjustment part 22; the lower side of the top plate 5 is fixed with a guide column 54, The top plate 5 is provided with a guide hole 55 penetrating the top plate 5 and the guide column 54 , the mounting portion 23 passes through the guide hole 55 , and a plane bearing 8 is connected between the lower end surface of the guide column 54 and the upper end surface of the adjusting portion 22 . The adjusting part 22 is screwed to the base 21 , and the adjusting handle 221 drives the adjusting part 22 to rotate relative to the base 21 , so as to adjust the height of the adjusting part 22 , so that the welding tool can adjust the top plate 5 by adjusting the height of the adjusting part 22 . The distance from the base 1 enables the welding tool to be adapted to more types of centrifugal fan supports 9 , which is beneficial to improve the adaptability of the welding tool.

Further, the platen driving member 7 is an air cylinder, a driving member mounting plate 71 is arranged under the top plate 5, and both ends of the driving member mounting plate 71 are fixedly connected with the pressing plate driving member 7, and the driving rod of the pressing plate driving member 7 passes through the driving member. The mounting plate 71 is fixedly connected with the lower end surface of the top plate 5, and the upper part of the mounting part 23 is sleeved with a pulling plate 72. The pulling plate 72 and the driver mounting plate 71 are fixedly connected by at least two pulling rods 73, and the pulling rods 73 pass through the top plate 5 and can move relative to the top plate 5 , the lower end surface of the pulling plate 72 abuts against the upper end surface of the pressing plate 6 and can drive the pressing plate 6 to move down. The pressing plate driving member 7 and the driving member mounting plate 71 of the welding tool are located on the lower side of the top plate 5, which can make the overall center of gravity of the welding tool lower, which is beneficial to improve the overall stability of the welding tool when it is turned over, thereby further improving the welding accuracy. The welding tool is moved down by two symmetrically arranged drive member mounting plates 71 driven by cylinders, and then the drive member mounting plate 71 drives the pull plate 72 fixedly connected to it through the pull rod 73 to move down synchronously, and the pull plate 72 moves down to make The pressing plate 6 presses and fixes the elbow 92 and the installation panel 91, and has a simple structure, convenient operation and high stability.

As shown in FIG. 9 , the pressure plate 6 is in the shape of a long strip, and the elbow welding holes 61 are respectively provided at both ends of the pressure plate 6 . The width B1 of the hole 61 is greater than the width B2 of the through hole 62 , and one end of one elbow welding hole 61 is communicated with the through hole 62 and the other end is open. One end of one of the above-mentioned elbow welding holes 61 is communicated with the through hole 62, and the other end is open to facilitate the replacement of the corresponding pressure plate 6 according to the model of the centrifugal fan support 9, and further, the outer side of the elbow welding hole 61 is open. The design is more convenient for welding.

The welding tool can firstly position the elbow 92, the installation panel 91, the flange 93 or the screw 94 of the centrifugal fan support 9, and then perform welding. Through the auxiliary positioning of the welding tool, the positioning of the centrifugal fan support 9 can be The symmetry is better and the precision is higher, so that the installed centrifugal fan has better dynamic balance; at the same time, the method of positioning first and then welding can effectively avoid the displacement between the various parts of the centrifugal fan bracket 9 during the welding process. Thereby further improving the welding accuracy.

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention should be covered by the claims of the present invention. within the defined scope of protection.

Claims (10)

1. The utility model provides a welding frock of centrifugal fan support which characterized in that: the device comprises a base (1) and an upright post (2) arranged in the middle of the base (1), wherein four positioning devices (3) are fixedly connected to the base (1), and each positioning device (3) is detachably connected with a flange (93) or a screw (94) at the lower end of a corresponding supporting part (922); the utility model discloses a mounting panel's (91) is fixed on the base, the upper portion fixedly connected with of stand (2) is used for placing roof (5) of mounting panel (91), roof (5) are on a parallel with the side of going up of base (1), the top of roof (5) is equipped with and is used for compressing tightly return bend (92) and is fixed in clamp plate (6) on mounting panel (91), clamp plate (6) are connected with clamp plate driving piece (7) that drive clamp plate (6) reciprocate, the both ends of clamp plate (6) all are equipped with return bend welding hole (61), the middle part of return bend (92) is located the below of return bend welding hole (61).

2. The welding frock of centrifugal fan support of claim 1, its characterized in that: four welding windows (11) which penetrate the base (1) up and down are arranged on the base (1), the positioning device (3) is arranged above the corresponding welding window (11), the positioning device (3) comprises a positioning block (31) and a bolt (32), the middle part of the positioning block (31) is provided with a flange welding hole (311) which is coaxial with a flange hole (931) of a flange (93), the diameter of the flange welding hole (311) is larger than that of the flange hole (931), the flange welding hole (311) is positioned right above the welding window (11), the upper side surface of the positioning block (31) is fixedly connected with a flange positioning pin (312) matched with a connecting hole (932) of the flange (93), the flange positioning pin (312) can be inserted into the connecting hole (932) of the flange (93), the positioning block (31) is fixedly connected with the base (1) through a bolt (32).

3. The welding frock of centrifugal fan support of claim 2, its characterized in that: four flange pressing devices (4) are arranged on the base (1), each flange pressing device (4) comprises a pressing driving piece (41), a positioning rod (42), an adjusting rod (43), a clamping clamp (44) and a pressing rod (45), the upper end of each positioning rod (42) is rotatably connected with one end of each clamping clamp (44), the lower end of each positioning rod (42) is fixedly connected with the base (1), one end of each adjusting rod (43) is rotatably connected with each clamping clamp (44), the other end of each adjusting rod (43) is connected with the corresponding pressing driving piece (41), each pressing driving piece (41) can drive each adjusting rod (43) to move up and down and drive each clamping clamp (44) to rotate around the upper end of each positioning rod (42), an arc-shaped groove (443) matched with the bent pipe (92) is formed in the other end of each clamping clamp (44), each pressing rod (45) is fixedly connected to two sides of each arc-shaped groove (443), the adjusting rod (43) is arranged between the pressing rod (45) and the positioning rod (42) and is positioned at the end part close to the positioning rod (42).

4. The welding frock of centrifugal fan support of claim 3, its characterized in that: the central axes of the two welding windows (11) which are oppositely arranged coincide, the clamping pliers (44), the positioning rods (42) and the adjusting rods (43) are arranged on the central axes of the two corresponding welding windows (11), each clamping pliers (44) comprises a connecting plate (441) and an adjusting plate (442), the inner end portion of each connecting plate (441) is rotatably connected with the corresponding positioning rod (42) and the corresponding adjusting rod (43), the adjusting plates (442) are movably arranged at the outer end portions of the connecting plates (441), and the arc-shaped grooves (443) and the pressing rods (45) are arranged at the outer end portions of the adjusting plates (442).

5. The welding frock of centrifugal fan support of claim 1, its characterized in that: positioner (3) are including locating piece (31), screw rod locating hole (33) and bolt (32), the middle part of locating piece (31) is equipped with screw rod locating hole (33) that supplies screw thread portion (941) of screw rod (94) to pass, locating piece (31) pass through bolt (32) fixed connection with base (1).

6. The welding frock of centrifugal fan support of any one of claims 2-5, characterized in that: welding window (11) are rectangular form, the length direction interval of welding window (11) is provided with a plurality of piece locating holes (12) along the both sides of welding window (11), be equipped with on locating piece (31) with piece locating hole (12) complex piece mounting hole (313), bolt (32) can pass piece mounting hole (313) and piece locating hole (12).

7. The welding frock of centrifugal fan support of any one of claims 1-5, characterized in that: at least two positioning grooves (51) or at least two positioning columns (52) are arranged on the upper end face of the top plate (5), the positioning grooves (51) are arranged corresponding to the motor mounting holes (912) of the mounting panel (91), and the positioning grooves (51) are connected with the mounting panel (91) through positioning pins (53) penetrating through the motor mounting holes (912); the positioning column (52) can penetrate through a motor mounting hole (912) of the mounting panel (91).

8. The welding frock of centrifugal fan support of any one of claims 1-5, characterized in that: the upright post (2) comprises a base (21), an adjusting part (22) and an installation part (23) which are coaxially arranged, the lower end of the base (21) is fixedly connected with the base (1), the upper part of the base (21) is in threaded connection with the lower part of the adjusting part (22), an adjusting handle (221) is fixed on the outer side wall of the adjusting part (22), the installation part (23) is fixedly connected with the upper end of the adjusting part (22), and the diameter of the installation part (23) is smaller than that of the adjusting part (22); the downside of roof (5) is fixed with guide post (54), be equipped with guiding hole (55) that run through roof (5) and guide post (54) on roof (5), guiding hole (55) are passed in installation department (23), be connected with flat bearing (8) between the up end of the lower terminal surface of guide post (54) and regulation portion (22).

9. The welding frock of centrifugal fan support of claim 8, its characterized in that: the clamp plate driving piece (7) is the cylinder, the below of roof (5) is equipped with driving piece mounting panel (71), the equal fixedly connected with clamp plate driving piece (7) in both ends of driving piece mounting panel (71), the actuating lever of clamp plate driving piece (7) pass driving piece mounting panel (71) and with the lower terminal surface fixed connection of roof (5), the upper portion cover of installation department (23) is equipped with arm-tie (72), through two piece at least pull rod (73) fixed connection between arm-tie (72) and driving piece mounting panel (71), pull rod (73) pass roof (5) and can remove roof (5) relatively, the lower terminal surface of arm-tie (72) supports with the up end of clamp plate (6) and leans on and can drive clamp plate (6) and move down.

10. The welding frock of centrifugal fan support of claim 9, its characterized in that: clamp plate (6) are rectangular form, the both ends of clamp plate (6) are located respectively in return bend welding hole (61), the middle part of clamp plate (6) is equipped with through-hole (62) that supply installation department (23) and pull rod (73) to pass, the width B1 of return bend welding hole (61) is greater than the width B2 of through-hole (62), the one end and through-hole (62) intercommunication, the other end opening of one of them return bend welding hole (61).

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