Stainless steel ventilation pipe and connecting device for producing stainless steel ventilation pipe

Abstract

The utility model relates to the field of air pipe manufacturing, and discloses a stainless steel ventilation pipe and a connecting device for producing the stainless steel ventilation pipe. The connecting device for producing the stainless steel ventilation pipe comprises a feeding frame, a belt feeding roller set and a welding gun and further comprises a containing table, the belt feeding roller set and the welding gun are connected to the containing table, a guide ring belt is detachably connected to the containing table and is of a cylindrical structure, a metal belt stretches into the guide ring belt under the thrust of the belt feeding roller set, and the metal belt is connected with the welding gun. The guide ring belt is provided with a feeding end allowing a metal belt to stretch into, and the metal belt stretches into the guide ring belt and is attached to the inner wall of the guide ring belt to form a spiral structure with the edges making contact with one another. The device has the following advantages and effects that the guide ring belt is detachably connected with the placing table, and only guide ring belts with different sizes need to be replaced for ventilation pipes with different sizes and diameters; and lubricating oil is introduced into the oil inlet pipe, so that friction between the outer wall of the metal belt and the inner wall of the guide ring belt is reduced, and abrasion of the outer wall of the metal belt is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air duct manufacturing, in particular to a stainless steel ventilation pipe and a connecting device for producing the same. Background Art

[0002] Spiral duct is a thin-walled spiral tube made of metal strips. It is round and is mostly used for air supply and bulk material transportation, replacing traditional galvanized iron pipes. Its main uses are as follows:

[0003] (1) Air supply, including ventilation, such as fresh air supply and exhaust air supply, has a wide range, such as factory workshops and production sites. The air needs to be discharged outdoors due to the generation of harmful gases, and the outdoor air needs to be transported indoors. In this case, air delivery pipes with large flow and low pressure should be used. Spiral ducts are the most suitable. In general, galvanized iron pipes are used, and stainless steel pipes are used in corrosive and particularly humid places.

[0004] (2) Exhaust fume. The kitchens of restaurants, hotels and inns all produce a lot of fume, which needs to be exhausted. The circular air duct is the fume chimney. Here, the spiral air duct should be called the fume duct.

[0005] Patent application number 2020203433195 discloses a spiral duct machine, which uses welding to connect the steel belt, making the spiral duct connection more stable, with a long service life, and avoiding leakage at the bite;

[0006] However, the above technical solution drives the spiral pipe clamp to rotate and retreat at the same time by the rotating advance and retreat device, and the structure is more complicated. For pipes with different diameters, different lead screws need to be replaced to adapt, which increases the cost and is very inconvenient. Utility Model Content

[0007] The utility model aims to provide a stainless steel ventilation pipe, comprising a metal belt, wherein the metal belt is spirally arranged to form a cylindrical structure, the edge of the metal belt is fixed by biting, and both sides of the metal belt are respectively provided with an outwardly bent connecting hook and an inwardly bent connecting buckle, and the connecting hook extends into the connecting buckle and is bitten and fixed.

[0008] The utility model also provides a connecting device for producing the above-mentioned stainless steel ventilation pipe, which has the effect of convenient welding.

[0009] The above-mentioned technical purpose of the utility model is achieved through the following technical scheme: it includes a feeding rack, a tape feeding roller group and a welding gun, and also includes a placing table, the tape feeding roller group and the welding gun are connected to the placing table, the placing table is detachably connected with a guide ring belt, the guide ring belt is arranged as a cylindrical structure, the metal belt is thrust into the guide ring belt by the tape feeding roller group, a feeding end for the metal belt to be inserted is arranged on the guide ring belt, the metal belt is inserted into the guide ring belt and fits with the inner wall of the guide ring belt to form a spiral structure with edges contacting each other, a clamping wheel is rotatably connected to the placing table, the contact point of the edge of the metal belt is deformed and bitten and fixed by the clamping force of the clamping wheel, the welding gun is inserted into the guide ring belt and contacts the inner wall of the metal belt.

[0010] By adopting the above technical scheme, the metal belt is extended into the guide ring belt from the feeding end of the guide ring belt. Due to its own elasticity, the metal belt fits the inside of the guide ring belt better. After the metal belt is wrapped around the guide ring belt once, the side of the metal belt that has been wrapped around once contacts the side of the metal belt that has just been inserted into the guide ring belt. The connecting hook is extended into the connecting buckle. As the metal belt continues to be extended, the connecting hook and the connecting buckle that are in contact with each other move toward the direction of the clamping wheel, so that they are clamped by the clamping wheel. The connecting hook and the connecting buckle are engaged and fixed with each other, thereby forming a cylindrical structure. The welding gun welds the engaging and fixing parts of the connecting hook and the connecting buckle, thereby further improving the stability of the cylindrical structure. On the other hand, the guide ring belt and the placing table are arranged to be detachably connected. For ventilation pipes of different diameters, only guide ring belts of different sizes need to be replaced.

[0011] The utility model is further configured as follows: a positioning plate located between the tape feed roller group and the feed end is fixedly connected to the placement table, a positioning groove for the metal tape to pass through is provided on the positioning plate, the metal tape passes through the positioning groove and enters the feed end, and the pressure wheel is rotatably connected to the positioning plate.

[0012] By adopting the above technical solution, the metal belt passes through the positioning groove, thereby improving the movement stability of the metal belt.

[0013] The utility model is further configured as follows: a guide roller located at the edge of the metal belt is rotatably connected to the positioning plate, and the side edge of the metal belt contacts the side wall of the guide roller.

[0014] By adopting the above technical solution, the guide wheel guides and positions the edge of the metal belt, further improving the stability of the metal belt conveying.

[0015] The utility model is further configured as follows: the side wall of the guide ring belt is provided with an oil outlet through hole, and the oil outlet through hole is connected with an oil inlet pipe.

[0016] By adopting the above technical solution, lubricating oil is introduced into the oil inlet pipe, thereby reducing the friction between the outer wall of the metal belt and the inner wall of the guide ring belt, thereby reducing the wear of the outer wall of the metal belt.

[0017] The utility model is further configured as follows: a connecting block is fixedly connected to the bottom of the guide ring belt, a connecting groove for the connecting block to be embedded in is provided on the placement table, a locking slope is provided on the side of the connecting block, a locking plate is detachably connected to the placement table, a pushing slope is provided on the side of the locking plate, the pushing slope applies a thrust to the locking slope and limits the connecting block from being separated from the connecting groove.

[0018] By adopting the above technical solution, when connecting the guide ring belt, the connecting block is embedded in the connecting groove, and the locking plate approaches the connecting block. Through the contact between the locking inclined surface and the estimated inclined surface, the pushing inclined surface applies a thrust to the locking inclined surface, thereby fixing the connecting block in the connecting groove, thereby improving the stability of the guide ring belt connection.

[0019] The utility model is further configured as follows: a locking bolt is threadedly connected to the placing table, a connecting hole for the locking bolt to pass through is provided on the locking plate, and the locking plate is pushed close to the connecting block by the locking bolt.

[0020] By adopting the above technical solution, the locking plate is detachably connected to the placement table through the locking bolts, and the locking bolts are tightened to push the locking plate close to the connecting block, thereby achieving compression of the connecting block.

[0021] The utility model is further configured as follows: the belt feeding roller group includes an active roller and a driven roller rotatably connected to the placement table, a driving motor is fixedly connected to the placement table to drive the active roller to rotate, the metal belt passes between the active roller and the driven roller, and the ends of the active roller and the driven roller are respectively connected to mutually meshing transmission gears.

[0022] The utility model is further configured as follows: the placement table is connected to a cooling water tank arranged below the welding gun.

[0023] By adopting the above technical solution, when the welding gun welds the metal strip, the cooling water tank receives and cools the sparks generated by the welding.

[0024] The utility model is further configured as follows: a smoking pipe with a port facing the welding gun is placed on the table, one end of the smoking pipe away from the welding gun is connected to negative pressure air, and an activated carbon filter is connected to the air outlet of the negative pressure fan.

[0025] By adopting the above technical solution, the negative pressure fan provides negative pressure to the smoke pipe, thereby absorbing the smoke generated by welding, and the activated carbon filter adsorbs and filters the smoke.

[0026] The beneficial effects of the utility model are:

[0027] 1. The guide ring belt and the placement table are set to be detachably connected. For ventilation pipes of different diameters, only the guide ring belts of different sizes need to be replaced;

[0028] 2. Lubricating oil is introduced into the oil inlet pipe to reduce the friction between the outer wall of the metal belt and the inner wall of the guide ring belt, thereby reducing the wear of the outer wall of the metal belt;

[0029] 3. When the welding gun welds the metal strip, the cooling water tank receives and cools the sparks generated by the welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0032] Figure 2 yes Figure 1 Enlarged schematic diagram at point A in the middle.

[0033] Figure 3 It is a schematic structural diagram of the forming roller group of this embodiment.

[0034] Figure 4 It is a schematic diagram of the connection relationship between the smoking pipe and the cooling water tank in this embodiment.

[0035] Figure 5 Schematic diagram of the connection relationship of the connection blocks in this embodiment.

[0036] Figure 6 It is a structural schematic diagram of the stainless steel ventilation pipe of this embodiment.

[0037] Figure 7 This is a schematic diagram of the metal belt connection relationship in this embodiment.

[0038] In the figure, 1. metal belt; 11. connecting hook; 12. connecting buckle; 2. feeding rack; 3. belt feeding roller group; 31. active roller; 32. driven roller; 33. driving motor; 34. transmission gear; 4. welding gun; 5. placing table; 51. clamping wheel; 52. positioning plate; 53. positioning groove; 54. guide roller; 55. forming circular groove; 56. connecting groove; 6. forming roller group; 61. forming roller; 7. metal belt roll; 8. guide ring belt; 81. oil outlet hole; 82. oil inlet pipe; 84. connecting block; 841. locking slope; 9. locking plate; 91. pushing slope; 92. locking bolt; 93. connecting hole; 94. smoking pipe; 95. negative pressure fan; 96. activated carbon filter; 97. cooling water tank. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] An embodiment, a stainless steel ventilation pipe, as shown in the figure, includes a metal belt 1, which is spirally arranged to form a cylindrical structure, the edge of the metal belt 1 is bitten and fixed, and the two sides of the metal belt 1 are respectively provided with an outwardly bent connecting hook 11 and an inwardly bent connecting buckle 12, and the connecting hook 11 extends into the connecting buckle 12 and is bitten and fixed.

[0041] A connecting device for producing the above-mentioned stainless steel ventilation pipe, such as Figure 1 As shown, it includes a feeding rack 2, a forming roller group 61, a tape feed roller group 3 and a welding gun 4, and also includes a placement table 5. The tape feed roller group 3 and the welding gun 4 are connected to the placement table 5. The tape feed roller group 3 includes an active roller 31 and a driven roller 32 that are rotatably connected to the placement table 5. A driving motor 33 that drives the active roller 31 to rotate is fixedly connected to the placement table 5. The metal strip 1 passes between the active roller 31 and the driven roller 32. The ends of the active roller 31 and the driven roller 32 are respectively connected to mutually meshing transmission gears 34. The forming roller group 61 includes four pairs of forming rollers 61 that are rotatably connected to the placement table 5. After the metal strip 1 passes through the forming roller group 61, the two sides of the metal strip 1 are as shown in FIG. Figure 6 , Figure 7As shown, one side of the connecting buckle 12 is bent inwards, and the other side is bent outwards. The placing table 5 is detachably connected with a guide belt 8, which is set as a cylindrical structure. The side wall of the guide belt 8 is provided with an oil outlet hole 81, and the oil outlet hole 81 is connected with an oil inlet pipe 82. The thrust of the metal belt 1 receiving the belt conveyor roller group 3 extends into the guide belt 8, and the guide belt 8 is provided with a feeding end for the metal belt 1 to extend into. The metal belt 1 extends into the guide belt 8 and fits with the inner wall of the guide belt 8 to form a spiral structure with edges in contact with each other. The placing table 5 is rotatably connected with a clamping wheel 51, and the contact part of the edge of the metal belt 1 is deformed and fixed by the clamping force of the clamping wheel 51. The welding gun 4 extends into the guide belt 8 and contacts the inner wall of the metal belt 1.

[0042] like Figure 1 , Figure 2 As shown, a positioning plate 52 located between the tape feed roller group 3 and the feed end is fixedly connected to the placement table 5, and a positioning groove 53 for the metal tape 1 to pass through is provided on the positioning plate 52. The metal tape 1 passes through the positioning groove 53 and enters the feed end, and the pressure wheel 51 is rotatably connected to the positioning plate 52.

[0043] like Figure 2 As shown, the positioning plate 52 is rotatably connected to a guide roller 54 located at the edge of the metal belt 1, and the side of the metal belt 1 contacts the side wall of the guide roller 54. The side of the guide roller 54 is provided with a forming circular groove 55, and the outwardly bent edge of the metal belt 1 passes through the forming circular groove 55 to form a connecting hook 11.

[0044] like Figure 6 As shown, a connecting block 84 is fixedly connected to the bottom of the guide ring belt 8, a connecting groove 56 for the connecting block 84 to be embedded is provided on the placement platform 5, a locking inclined surface 841 is provided on the side of the connecting block 84, and a locking plate 9 is detachably connected to the placement platform 5, and a pushing inclined surface 91 is provided on the side of the locking plate 9. The pushing inclined surface 91 applies a thrust to the locking inclined surface 841 and restricts the connecting block 84 from being separated from the connecting groove 56. A locking bolt 92 is threadedly connected to the placement platform 5, and a connecting hole 93 for the locking bolt 92 to pass through is provided on the locking plate 9. The locking plate 9 is pushed close to the connecting block 84 by the thrust of the locking bolt 92. The locking plate 9 is detachably connected to the placement platform 5 by the locking bolt 92. Tightening the locking bolt 92 pushes the locking plate 9 close to the connecting block 84, thereby achieving compression of the connecting block 84.

[0045] like Figure 5As shown, the placement table 5 is connected to a cooling water tank 97 arranged below the welding gun 4. The placement table 5 is connected to a smoke pipe 94 whose port faces the welding gun 4, and the end of the smoke pipe 94 away from the welding gun 4 is connected to negative pressure air, and the air outlet of the negative pressure fan 95 is connected to an activated carbon filter 96. The cooling water tank 97 receives and cools the water splashes generated by welding, the negative pressure fan 95 provides negative pressure to the smoke pipe 94, thereby absorbing the smoke generated by welding, and the activated carbon filter 96 absorbs and filters the smoke.

[0046] When the connection device of the stainless steel ventilation pipe is used, the metal belt 1 roller is connected to the feeding frame 2, and the metal belt 1 passes through the forming roller 61 group 6 and the guide roller 54 to complete the forming. The belt feeding roller group 3 provides traction for the metal belt 1, and the formed metal belt 1 extends from the feeding end of the guide ring belt 8 into the guide ring belt 8. The metal belt 1 fits the guide ring belt 8 better due to its own elasticity. After the metal belt 1 goes around the guide ring belt 8, the side of the metal belt 1 that has gone around and just extended into the guide ring belt is The sides of the metal belt 1 in 8 are in contact with each other, and the connecting hook 11 extends into the connecting buckle 12. As the metal belt 1 continues to extend, the connecting hook 11 and the connecting buckle 12 that are in contact with each other move toward the clamping wheel 51, so that they are clamped by the clamping wheel 51. The connecting hook 11 and the connecting buckle 12 are engaged and fixed to each other, thereby forming a cylindrical structure. The welding gun 4 welds the engaging and fixing parts of the connecting hook 11 and the connecting buckle 12. For ventilation pipes of different diameters, only guide ring belts 8 of different sizes need to be replaced.

Claims

1. A stainless steel ventilation pipe, characterized in that: The invention comprises a metal belt (1), wherein the metal belt (1) is spirally arranged to form a cylindrical structure, the edge of the metal belt (1) is fixed by biting, and the two sides of the metal belt (1) are respectively provided with an outwardly bent connecting hook (11) and an inwardly bent connecting buckle (12), and the connecting hook (11) extends into the connecting buckle (12) and is bitten and fixed.

2. A connecting device for producing the stainless steel ventilation pipe as claimed in claim 1, comprising a feeding frame (2), a belt feeding roller group (3) and a welding gun (4), characterized in that: It also includes a placement table (5), the tape feed roller group (3) and the welding gun (4) are connected to the placement table (5), the placement table (5) is detachably connected with a guide ring belt (8), the guide ring belt (8) is arranged as a cylindrical structure, the metal tape (1) is pushed into the guide ring belt (8) by the tape feed roller group (3), the guide ring belt (8) is provided with a feeding end for the metal tape (1) to be inserted, the metal tape (1) is inserted into the guide ring belt (8) and fits with the inner wall of the guide ring belt (8) to form a spiral structure with edges in contact with each other, the placement table (5) is rotatably connected with a clamping wheel (51), the contact part of the edge of the metal tape (1) is deformed and fixed by the clamping force of the clamping wheel (51), and the welding gun (4) is inserted into the guide ring belt (8) and contacts with the inner wall of the metal tape (1).

3. The connecting device for stainless steel ventilation pipes according to claim 2, characterized in that: A positioning plate (52) located between the tape feed roller group (3) and the feed end is fixedly connected to the placement table (5), and a positioning groove (53) for the metal tape (1) to pass through is provided on the positioning plate (52). The metal tape (1) passes through the positioning groove (53) and enters the feed end. The pressure wheel (51) is rotatably connected to the positioning plate (52).

4. The connection device for stainless steel ventilation pipes according to claim 3, characterized in that: A guide roller (54) located at the edge of the metal belt (1) is rotatably connected to the positioning plate (52), and the side edge of the metal belt (1) is in contact with the side wall of the guide roller (54).

5. The connection device for stainless steel ventilation pipes according to claim 2, characterized in that: The side wall of the guide ring belt (8) is provided with an oil outlet through hole (81), and the oil outlet through hole (81) is connected to an oil inlet pipe (82).

6. The connection device for stainless steel ventilation pipes according to claim 2, characterized in that: A connecting block (84) is fixedly connected to the bottom of the guide ring belt (8); a connecting groove (56) for the connecting block (84) to be embedded is provided on the placement platform (5); a locking inclined surface (841) is provided on the side of the connecting block (84); a locking plate (9) is detachably connected to the placement platform (5); a pushing inclined surface (91) is provided on the side of the locking plate (9); the pushing inclined surface (91) applies a thrust to the locking inclined surface (841) and restricts the connecting block (84) from being separated from the connecting groove (56).

7. The connection device for stainless steel ventilation pipes according to claim 6, characterized in that: The placement table (5) is threadedly connected with a locking bolt (92), and the locking plate (9) is provided with a connecting hole (93) for the locking bolt (92) to pass through. The locking plate (9) is pushed closer to the connecting block (84) by the pushing force of the locking bolt (92).

8. The connection device for stainless steel ventilation pipes according to claim 2, characterized in that: The belt feeding roller group (3) comprises an active roller (31) and a driven roller (32) which are rotatably connected to the placement platform (5); a driving motor (33) is fixedly connected to the placement platform (5) for driving the active roller (31) to rotate; the metal belt (1) passes between the active roller (31) and the driven roller (32); and the ends of the active roller (31) and the driven roller (32) are respectively connected to mutually meshing transmission gears (34).

9. The connection device for stainless steel ventilation pipes according to claim 2, characterized in that: The placement table (5) is connected to a cooling water tank (97) disposed below the welding gun (4).

10. The connection device for stainless steel ventilation pipes according to claim 2, characterized in that: A smoking pipe (94) with a port facing the welding gun (4) is connected to the placement table (5); one end of the smoking pipe (94) away from the welding gun (4) is connected to a negative pressure fan (95); and an activated carbon filter (96) is connected to the air outlet of the negative pressure fan (95).

Images