Metal filter bag connecting structure and welding tool

Abstract

According to the metal filter bag connecting structure, a metal filter bag is formed by connecting at least two sections of filter bags, the end parts of two adjacent filter bag hole pipes are in butt joint, the end part of one filter bag hole pipe shrinks inwards to form a necking section which can be inserted into and clamped into the end part of the other hole pipe, and the necking section is welded with the abutting part of the end part of the other hole pipe. A welding tool of a metal filter bag connecting structure comprises a rack, one end of the rack is provided with a head end fixing assembly, the other end of the rack is provided with a jacking tailstock and a plurality of sets of positioning mechanisms, the positioning mechanisms can be fixed to the rack after sliding, and the positioning mechanisms are located between the head end fixing assembly and the jacking tailstock. According to the welding tool, the connecting structure of the metal filter bag is simpler, the welding efficiency is high, the cost is lower, the welding tool corresponding to the filter bag can effectively control the jumping degree of the butt joint position when the connecting position is squeezed tightly, and the straightness of a hole pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of welding tool design for environmentally friendly products, and more specifically to a metal filter bag connection structure and a welding tool. Background Art

[0002] The general high temperature resistant metal filter bag is made of metal mesh and metal powder, which is pressed and sintered to form a porous filter material, and then welded to form a filter bag. The metal film has the characteristics of high temperature resistance, strong acid and alkali resistance, high mechanical strength, and certain flexibility. It solves the problem of high-precision interception of dust particles in high-temperature industrial flue gas and is an ideal high-temperature flue gas dust removal material.

[0003] It is now widely used in the treatment of dust in flue gas in modern industry. The filter bag is generally composed of multiple sections welded together, and the workload of connection welding is relatively large. The key points in controlling the quality of the filter bag are: the straightness of the filter bag and the sealing degree after welding are the key points. The key points in controlling the cost of the filter bag are: simple and reasonable structure and high welding efficiency.

[0004] At present, since the annular seam position of the metal filter bag is subjected to multiple welding heating (first resistance straight seam welding and then resistance annular seam welding) during the preparation process of the semi-finished product, in order to avoid significant difference in roundness of the butt joint position and keep the weld gap consistent, a pair of machined orifice tube end face connectors are generally connected at the end of the filter bag joint orifice tube 1, such as Figure 1 and Figure 2 As shown. The connector generally includes two first joints 21' and second joints 22' that can be butted together and limited, and then a welding point 23' is formed on the outside of the connection between the two, and a circumferential weld (circumferential gas shielded welding) is formed at the welding point 23'. Such a connection structure has the following disadvantages: ① Since the end connection of the filter bag joint hole tube is a pair of hole tube end face connectors machined by machine (for example, the first joint 21' or the second joint 22' is circumferentially welded on the end of the hole tube 1, and the structure of the first joint 21' and the second joint at the butt joint also needs to be punched and formed), the structure is complicated to process and requires multiple weldings to complete; ② Due to the large number of assemblies and welding points, the verticality of the hole tube end face connector and the hole tube is greatly affected, and it is difficult to ensure the accuracy of the two end face joints during butt jointing, and the welding cannot be simple mechanized welding, and can only be connected by manual welding, which has high work intensity and low welding efficiency.

[0005] In addition, when assembling and welding the existing metal filter bags, they generally need to be manually rounded and spot welded on a spot welding workbench before they can be transferred to the assembly welding workbench for rotational assembly welding. On the one hand, this processing method has a low degree of automation, is greatly interfered by human factors, is difficult to control straightness, and has large product size deviations, which brings certain difficulties to installation; on the other hand, switching back and forth between the spot welding and assembly welding workbenches requires a lengthy process, low processing efficiency, high cost, high energy consumption, and high labor intensity. Utility Model Content

[0006] The purpose of the utility model is to provide a metal filter bag connection structure and welding tooling, which makes the connection structure of the metal filter bag simpler, has high welding efficiency and lower cost, and the welding tooling corresponding to the filter bag can effectively control the jump of the joint caused by squeezing the connection, thereby ensuring the straightness of the hole tube.

[0007] In order to achieve the above purpose, the solution of the utility model is:

[0008] A metal filter bag connection structure, the metal filter bag includes at least two filter bag sections connected together, the ends of two adjacent filter bag hole tubes are butted against each other, one end of a filter bag hole tube is inwardly contracted to form a shrinking section that can be inserted into and stuck into the other hole tube end, and the shrinking section is welded to the part where it abuts against the other hole tube end.

[0009] Furthermore, the shrinking section includes an inwardly shrinking section formed after an inclined transition section is formed inwardly at one end of the orifice tube, the inwardly shrinking section is clamped on the inner side of the end of the other orifice tube, and a weld is formed between the inclined transition section and the end point of the other orifice tube.

[0010] A welding tool for the above-mentioned metal filter bag connection structure comprises: a frame, one end of the frame is provided with a head end fixing assembly, the other end is provided with a top tightening tail frame, and a plurality of positioning mechanisms that can be slidably fixed on the frame, the positioning mechanisms being located between the head end fixing assembly and the top tightening tail frame;

[0011] The butt joints of two adjacent filter bags are supported on the positioning mechanism. After the multi-section filter bags are butted against each other, they are located on the same horizontal axis. The two ends of the multi-section metal filter bags are tightened by the tightening tail frame.

[0012] The positioning mechanism includes a base installed on the frame, two lower positioning wheels are arranged on the base, the butt joints of two adjacent filter bag hole tubes are supported on the two lower positioning wheels, one side of the base is also connected to a support frame, an upper positioning wheel is arranged on the support frame and is located above the two lower positioning wheels, and the two lower positioning wheels and the upper positioning wheel simultaneously tighten and position the butt joints of two adjacent filter bags.

[0013] Furthermore, the support frame includes a vertical rod and a connecting rod. The vertical rod is vertically supported on one side of the base. The connecting rod includes a vertical section and a horizontal section that form a vertical relationship. The upper positioning wheel is pivotally connected to the outer end of the horizontal section. The vertical section can be slidably connected to the vertical rod and locked by a locking member.

[0014] Furthermore, the support frame also includes a cross bar, which is installed on one side of the base, and the other side of the cross bar is connected to the vertical bar through a locking hand wheel. The vertical bar is vertically supported on the cross bar after being fixed by the locking hand wheel.

[0015] Furthermore, a support platform with adjustable height is installed on the base, and two positioning wheels are pivotally connected to the two ends of the support platform respectively.

[0016] Furthermore, the head end fixing assembly includes a three-jaw chuck connected to a power head, the three-jaw chuck is rotationally connected to a motor in the power head, the three-jaw chuck clamps the head end of the multi-section filter bag, and the tail frame tightens the tail end of the multi-section filter bag.

[0017] Furthermore, the tightening tail frame can be slidably connected to the frame, and the tightening tail frame is provided with a tightening plate and a handle which can push the tightening plate to move forward and backward.

[0018] Furthermore, the frame is provided with a strip-shaped slide groove along the length direction, the bottom of the base of the positioning mechanism passes through the slide groove, and is locked at the bottom of the slide groove by a locking piece.

[0019] After adopting the above structure, when the multi-section filter bag perforated tube of the utility model is butted, one of the perforated tube ends is formed into a shrinking section, and the other is not shrinking, and the shrinking section is inserted into the other perforated tube end, and the sinking welding method is used, which is relatively simple to process, has high welding efficiency and lower cost. At the same time, when welding at the butt joint of the perforated tubes, in the welding tool, the three-point positioning method of three positioning wheels can effectively control the jumping degree of the butt joint caused by the connection when it is squeezed, and ensure the straightness of the perforated tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of two filter bags being connected in the prior art;

[0021] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 It is a structural schematic diagram of two filter bags of the utility model being connected;

[0023] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0024] Figure 5 It is a structural schematic diagram of the welding tool of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the positioning mechanism in the welding tooling of the utility model. DETAILED DESCRIPTION

[0026] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0027] Combination Figure 3 , Figure 4 As shown, the utility model discloses a metal filter bag connection structure, the metal filter bag includes at least two sections of filter bags 1 connected together, each filter bag 1 includes a filter membrane 12 provided on the outer side of a perforated tube 11, and the filter membrane 12 can be a metal membrane. In the filter bags 1 with multiple sections connected front and back, the ends of the perforated tubes 11 of two adjacent filter bags are butted against each other, and a connection is formed at the butt joint, such as welding. In the utility model, at the butt joint, the end of the perforated tube 11 of one filter bag is contracted to form a shrinking section 13 that can be inserted into and stuck in the end of the other perforated tube 11, and the shrinking section 13 is welded to the part C where the end of the other perforated tube 11 abuts.

[0028] Specifically, the necking section 13 may include an inwardly inclined transition section 131 formed at one end of the orifice tube 11 and then an inwardly contracted section 132 formed, the inwardly contracted section 132 is stuck on the inner side of the end of the other orifice tube 11, and a weld is formed between the inclined transition section 131 and the end point of the other orifice tube 11.

[0029] The above connection structure greatly simplifies the welding structure between the filter bag joints. Since no special joints are required and no additional parts are needed, the end of one section of the filter bag hole tube needs to be formed into a necked section 13 and inserted into the end of the other section of the filter bag hole tube to achieve docking and positioning. The operation is convenient. Since there is only one end face at the welding point, it can be welded to the outer diameter surface of the inserted hole tube. Compared with the existing connection structure, the welding place is much less, and the filter bag produced is more efficient and more cost-effective.

[0030] Combination Figure 5 , Figure 6As shown, the utility model also discloses a welding tool that can be used for the above-mentioned metal filter bag connection structure, which includes: a frame 2, one end of the frame 2 is provided with a head end fixing component 3, the other end is provided with a tightening tail frame 4, and multiple groups of positioning mechanisms 5 that can be slidably fixed on the frame, and the positioning mechanisms are located between the head end fixing component 3 and the tightening tail frame 4. The butt joints of two adjacent filter bags 1 are supported on the positioning mechanism 5, and the multi-section filter bags are on the same horizontal axis after being abutted front and back. The head end of the orifice tube 11 (shown as an orifice tube in the figure) of the multi-section filter bag is fixed by the head end fixing component 3, and the two ends of the metal filter bag after the multi-section arrangement are tightened by the tightening tail frame 4. The positioning mechanism 5 may include a base 51 installed on the frame 2, with two lower positioning wheels 52 provided on the base 51, and the butt joints of two adjacent filter bag hole tubes 11 are supported on the two lower positioning wheels 52. A support frame 6 is also connected to one side of the base 51, and an upper positioning wheel 61 is provided on the support frame 6 and is located above the two lower positioning wheels 52. The two lower positioning wheels 52 and the upper positioning wheel 61 simultaneously tighten and position the butt joints of two adjacent filter bags to form a three-point support positioning.

[0031] Specifically, the frame 1 may be provided with a strip-shaped slide groove 21 along the length direction, the bottom of the base 51 of the positioning mechanism passes through the slide groove 21, and is locked at the bottom of the slide groove by a locking piece 22. A support platform 53 with an adjustable height may be installed on the base 51, and two lower positioning wheels 52 are respectively pivotally connected to the two ends of the support platform 53. By adjusting the distance between the two bases 51, or adjusting the height of the lower positioning wheels 52, the welding of filter bags of different specifications can be adapted.

[0032] The support frame 6 may include a vertical rod 62 and a connecting rod 63. The vertical rod 62 is vertically supported on one side of the base 51. The connecting rod 63 includes a vertical section 631 and a horizontal section 632 that form a vertical relationship. The upper positioning wheel 61 is pivoted to the outer end of the horizontal section 632. The vertical section 631 can be slidably connected to the vertical rod 631 and locked by a locking member. A strip-shaped slot can be provided on the vertical rod 62, and the vertical section 631 is inserted into the slot. A slot 6311 is also provided in the vertical section 631. At least one locking member is provided in the slot. In this embodiment, the locking member is a bolt 6312. The height of the vertical section 631 is driven by the strip slot 6311 to adjust the downward pressure height of the upper positioning wheel 61 in the connecting section. The support frame 6 may also include a horizontal rod 64. The horizontal rod 64 is installed on one side of the base 51. The other side of the horizontal rod 64 is connected to the vertical rod 62 through a locking hand wheel 65. The vertical rod 62 can be fixed by a locking hand wheel and vertically supported on the horizontal rod 64. When the support frame 6 needs to be lowered, the locking hand wheel 65 is released and rotated to drive the vertical rod 62 and the connecting rod 63 to be lowered.

[0033] The head end fixing assembly 3 includes a three-jaw chuck 31 connected to a power head 32, and the three-jaw chuck 31 is rotatably connected to the motor in the power head 32. The three-jaw chuck 31 can clamp the head end of the multi-section filter bag 1, and the tightening tail frame 4 tightens the tail end of the multi-section filter bag to achieve tightening of the two ends of the multi-section filter bag. The tightening tail frame 4 is slidably connected to the frame 2, and a tightening plate 41 and a handle 43 that can push the tightening plate to move forward and backward are provided on the tightening tail frame 4. The handle 43 can push the tightening plate 41 by spiral propulsion.

[0034] When the welding tool of the utility model is used, the head end of the metal filter bag is clamped by the three-jaw chuck 31, and the end of the hole tube of two or more semi-finished filter bags is inserted into the shrinking section 13 of the other hole tube end, and there are at least one or more docking positions, which are located on the two lower positioning wheels 52 of the positioning mechanism 5, and then the upper positioning wheel 61 on the support frame 6 is adjusted to press and realize positioning to prevent arching in the middle. When the filter bag joint on one of the positioning structures is to be welded, the support frame 6 is put down to realize welding of the welding part of the hole tube docking.

[0035] Since the positioning mechanism 5 has a positioning function for the joint when the two filter bag orifice tubes are butt-jointed, the joint is better controlled and will not bulge after being tightened, effectively ensuring the straightness of the butt joint. In addition, since the orifice tube is a thin-walled tube (0.7mm thick) and is formed by spiral welding, there is also a certain deviation in roundness (0.1-0.2mm), and the transition section (inclined transition section 131) forming the necking section 13 is tapered, which is more convenient to insert into the end of the orifice tube without necking. The tapered section can ensure that it is closely attached to the end face of the orifice tube, and the gap is very small (less than 0.2mm), which is very easy to weld without filler wire, and is conducive to mechanized welding.

[0036] After adopting the above scheme, the filter bag connection structure and welding tooling of the utility model can have the following advantages:

[0037] 1. In the filter bag, one end of the clamping tube is inserted into the other end without shrinking by using a shrinking end, and no special connector is made, which simplifies the connection;

[0038] 2. In the welding tooling, the three-point control of the orifice tube is designed to ensure that the entire filter bag tube will not arch when it is connected and tightened, ensuring the concentricity of the filter bag connection, with only 0.5mm runout in the radial direction. Since the end face of the orifice tube is laser cut, the end face and the center of the orifice tube are guaranteed to have a high verticality, and the rear end seam has only 0.5 clearance in the circumferential direction after insertion;

[0039] 3. Since the above conditions can meet the requirements of laser fixed-point welding without filler wire, mechanized welding can be realized, and the welding efficiency can be increased by 7-8 times.

[0040] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A metal filter bag connection structure, the metal filter bag comprises at least two filter bags connected together, characterized in that: The ends of two adjacent filter bag hole tubes are butted against each other, wherein the end of one filter bag hole tube is inwardly contracted to form a shrinking section that can be inserted into and stuck in the end of the other hole tube, and the portion where the shrinking section abuts against the end of the other hole tube is welded.

2. A metal filter bag connection structure as claimed in claim 1, characterized in that: The shrinking section includes an inwardly shrinking section formed after an inclined transition section is formed inwardly at one end of the orifice tube, the inwardly shrinking section is clamped at the inner side of the end of the other orifice tube, and welding is formed between the inclined transition section and the end point of the other orifice tube.

3. A welding tool for the metal filter bag connection structure according to claim 1 or 2, characterized in that: include: A frame, one end of the frame is provided with a head end fixing assembly, the other end is provided with a top tightening tail frame, and multiple groups of positioning mechanisms that can be slidably fixed on the frame, the positioning mechanisms are located between the head end fixing assembly and the top tightening tail frame; The butt joints of two adjacent filter bags are supported on the positioning mechanism. After the multi-section filter bags are butted against each other, they are located on the same horizontal axis. The two ends of the multi-section metal filter bags are tightened by the tightening tail frame. The positioning mechanism includes a base installed on the frame, two lower positioning wheels are arranged on the base, the butt joints of two adjacent filter bag hole tubes are supported on the two lower positioning wheels, one side of the base is also connected to a support frame, an upper positioning wheel is arranged on the support frame and is located above the two lower positioning wheels, and the two lower positioning wheels and the upper positioning wheel simultaneously tighten and position the butt joints of two adjacent filter bags.

4. The welding tool as claimed in claim 3, characterized in that: The support frame includes a vertical rod and a connecting rod. The vertical rod is vertically supported on one side of the base. The connecting rod includes a vertical section and a horizontal section that form a vertical relationship. The upper positioning wheel is pivotally connected to the outer end of the horizontal section. The vertical section can be slidably connected to the vertical rod and locked by a locking member.

5. The welding tool as claimed in claim 4, characterized in that: The support frame also includes a crossbar, which is installed on one side of the base. The other side of the crossbar is connected to the vertical rod through a locking hand wheel. The vertical rod is vertically supported on the crossbar after being fixed by the locking hand wheel.

6. The welding tool as claimed in claim 3, characterized in that: A support platform with adjustable height is installed on the base, and two positioning wheels are respectively pivotally connected to the two ends of the support platform.

7. The welding tool as claimed in claim 3, characterized in that: The head end fixing assembly includes a three-jaw chuck connected to a power head, the three-jaw chuck is rotatably connected to a motor in the power head, the three-jaw chuck clamps the head end of the multi-section filter bag, and the tail frame tightens the tail end of the multi-section filter bag.

8. The welding tool as claimed in claim 3 or 7, characterized in that: The tightening tail frame can be slidably connected to the frame, and the tightening tail frame is provided with a tightening plate and a handle which can push the tightening plate to move forward and backward.

9. The welding tool as claimed in claim 3, characterized in that: The frame is provided with a strip-shaped slide groove along the length direction, the bottom of the base of the positioning mechanism passes through the slide groove and is locked at the bottom of the slide groove by a locking piece.

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