An anti-deformation device for air duct welding

Abstract

The present invention discloses an anti-deformation device for duct welding, which belongs to the technical field of duct welding. The technical scheme is: an anti-deformation device for duct welding, characterized in that it includes a base, four slideways distributed in a cross shape are arranged in the base, telescopic arms are slidably arranged in the four slideways, and the outer ends of the telescopic arms are all provided with support components; the support components include a support layer made of asbestos material and in contact with the inner wall of the duct; and also include a locking piece for fixing the telescopic arm. The beneficial effects of the present invention are: the support layer adopts refractory asbestos material to provide internal support for the stainless steel welded duct, which does not affect the welding operation and can avoid the generation of concave deformation as much as possible.

Description

Technical Field

[0001] The invention belongs to the technical field of air duct welding, and in particular relates to an anti-deformation device for air duct welding. Background Art

[0002] Stainless steel welded air ducts are generally used for kitchen exhaust ducts or various environments that require corrosion resistance. Food-grade stainless steel is usually used, and the connection method is not the angle steel flange connection of conventional air ducts but argon arc welding connection.

[0003] During the welding construction of stainless steel welded air ducts, we often find that due to the existence of welding residual stress, the air ducts are dented and deformed, making it difficult to parallelly connect the stainless steel pipe materials on both sides during subsequent welding construction. At the same time, the area around the weld is also dented and deformed, which greatly affects the visual quality of the completed pipeline. At the same time, deformation will increase the difficulty of welding during the construction process, and the weld may be incomplete or leaky, affecting the construction quality.

[0004] At present, in the construction process, the following methods are generally used to solve welding residual stress:

[0005] By adopting a reasonable welding sequence, you can choose to weld the end corners of the fixed ducts at both ends first, and then weld the rest of the parts. This method can reduce residual stress, but it still cannot avoid deformation. At the same time, it has higher technical requirements for welding and the welding time will be longer.

[0006] The method of preheating the pipeline is adopted, but it is difficult to preheat the pipeline at the construction site. On the one hand, it greatly prolongs the construction time, and on the other hand, it greatly increases the construction risk of workers during the welding process.

[0007] In view of the above problems, a device is designed which is placed in the pipeline and supported on the inner wall of the stainless steel air duct to resist the concave deformation during the welding process. Summary of the invention

[0008] The object of the present invention is to provide an anti-deformation device for air duct welding, which applies a supporting force from the inside of the air duct to resist the concave deformation during the welding process of the pipeline, thereby reducing the concave deformation of the air duct after the welding is completed.

[0009] The present invention is realized by the following measures: an anti-deformation device for air duct welding, characterized in that it comprises a base, four slideways distributed in a cross shape are arranged in the base, telescopic arms are slidably arranged in the four slideways, and the outer ends of the telescopic arms are all provided with support components;

[0010] The support assembly includes a support layer made of asbestos material and in contact with the inner wall of the air duct;

[0011] Also included is a locking member for fixing the telescopic arm.

[0012] Furthermore, the base may be a cross-shaped rod, and the slideway is arranged on four supporting rods.

[0013] Furthermore, the support assembly is slidably disposed on the telescopic arm and further includes a limiting member for limiting the movement of the support assembly.

[0014] The support assembly includes two support rods arranged above the outer end of the telescopic arm, and one end of the two support rods is installed at the middle position of the telescopic arm;

[0015] The outer sides of the two support rods are each provided with an arc-shaped plate with a convex middle, and the outer sides of the arc-shaped plates are each provided with the support layer. The outermost end of the support layer is located on the outer sides of the arc-shaped plate and the support rod. The arc-shaped plate is generally made of a deformable material with a certain hardness, such as memory alloy, spring steel, or thermoplastic elastic material. In this way, it can be ensured that the support layer first contacts the inner wall of the air duct.

[0016] The support layer is composed of a plurality of spheres bonded to the outer side of the arc-shaped plate, and two adjacent spheres are in contact with each other. The cross section of the sphere is circular or elliptical and is made of asbestos material.

[0017] The locking member is a card block, and the telescopic arm includes a telescopic arm body, a groove is provided at the middle position below the telescopic arm body along the length direction of the slideway, a fixing rod is provided in the groove, and the fixing rod is rotatably provided at the middle position of the two side walls of the groove through a fixed shaft, the card block is provided below the inner end of the fixing rod, and the upper part of the inner end of the fixing rod is fixed to the inner wall of the groove by a spring;

[0018] A plurality of limit openings cooperating with the clamping block are arranged on the bottom wall of the slideway at intervals along the length direction of the slideway;

[0019] The spring is not subjected to external force, and the clamping block is clamped in the limiting opening. When the outer end of the fixing rod is pressed downward, the spring is compressed, the clamping block is lifted up and separated from the limiting opening, and the fixing rod can rotate around the fixing axis, and there is a gap between the upper end surface of the groove and the fixing rod to allow the fixing rod to rotate.

[0020] The lower sides of the telescopic arm body are symmetrically provided with guide grooves along the length direction of the slideway, and the bottom wall of the slideway is symmetrically provided with guide posts that cooperate with the guide grooves. The cooperation between the guide grooves and the guide posts improves the stability of the telescopic arm body during the sliding process.

[0021] The two support rods are rotatably mounted on the upper end surface of the telescopic arm body. The two support rods can be stored in the slideway and can be stored in the space above the slideway when not in use.

[0022] The two support rods are generally connected by bolts, and a disc is fixedly arranged at the connecting end of the two support rods. A plurality of slots are evenly distributed on one disc, and a plurality of plugs matching the slots are evenly distributed on the other disc. The relative position between the two discs can be adjusted according to the correspondence between different plugs and slots, and the bolts need to be loosened before adjustment.

[0023] The outer surface of the telescopic arm body is provided with scale lines, which can be used to read the extension length of the telescopic arm.

[0024] The upper end surface of the telescopic arm body is provided with a boss along the length direction of the slideway, the boss is penetrated with a convex opening, a roller is slidably provided at the bottom of the convex opening, the upper end of the roller bracket extends out of the convex opening and the two support rods are provided at the extended end.

[0025] Side plates are symmetrically arranged on both sides above the telescopic arm body, and horizontal plates are fixedly arranged above the two side plates, with a gap between the two horizontal plates;

[0026] The limiting member comprises a collision block slidably disposed in the interval, the collision block being fixedly mounted on the roller bracket and located below the support rod;

[0027] The limiting member also includes a plurality of limiting shafts symmetrically arranged on the telescopic arm body and evenly spaced along the length direction of the slideway, and the limiting shafts are rotatably provided with limiting blocks, and a stopper rod corresponding to the limiting blocks is arranged on the telescopic arm body and between two adjacent limiting shafts located on the same side, and the stopper rod is located on the inner side of the limiting block;

[0028] When the collision block moves from the inside of the slide to the outside, the collision block contacts the limit block, pushing the limit block to rotate, and the collision block moves outward smoothly; when the collision block moves from the outside of the slide to the inside, the collision block contacts the limit block, the blocking rod restricts the rotation of the limit block, and the collision block is blocked and cannot move inward.

[0029] The contact surface between the inner side of the limit block and the collision block is an inclined surface.

[0030] Directions:

[0031] Before the duct welding construction begins, first take out one of the telescopic arms of the device. During the removal process, press down the outer end of the fixing rod, so that the block at the other end of the fixing rod will be lifted up, thus disengaging from the limit opening on the base, and the telescopic arm can move freely. After it is extended to a position suitable for the size of the duct, release the fixing rod, and the buckle on the other side rebounds under the action of the spring and inserts into the limit opening on the base, thus achieving the clamping fixation (repeat this step for the other three telescopic arms).

[0032] Adjust the two support rods to rotate to the appropriate angle so that the slots and corresponding rods are connected, and then fix them with bolts (repeat this step for the remaining three pairs of support rods).

[0033] Place the device in the air duct, and then slide the support assembly until the asbestos support layer is in close contact with the inner wall of the air duct and the collision block moves from the inside of the slideway to the outside during the sliding process of the support assembly, and the collision block contacts the limit block, pushing the limit block to rotate, and the support assembly is smoothly moved outward. When the asbestos support layer is deformed and pressed against the inner wall of the air duct, stop sliding the support assembly. At this time, due to the existence of the gear lever, the support assembly cannot be moved back (repeat this step for the adjustment of the other three support assemblies).

[0034] This device can be used in multiple combinations according to the length of the duct welding. In addition, after the duct welding is completed, the support assembly is facing upward, and the limit block rotates downward under the action of gravity. The support assembly can be reset under the action of gravity or manually assisted.

[0035] The technical solution provided by the embodiment of the present invention has the following beneficial effects: the support layer adopts refractory asbestos material to provide internal support for the stainless steel welded air duct, which does not affect the welding operation and can avoid the occurrence of concave deformation as much as possible; the device is easy to carry and easy to use, and the two support rods can be stored in the space above the slide when not in use; the arc rod has toughness and can be deformed to cooperate with the support layer of asbestos material, and can fit tightly with the air duct wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the present invention, a brief introduction will be given to the drawings used in the embodiments below. Obviously, the drawings listed 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 paying creative work.

[0037] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0038] Figure 2 is a schematic structural diagram of a telescopic arm body in an embodiment of the present invention;

[0039] Figure 3 is a schematic structural diagram of a support assembly in an embodiment of the present invention;

[0040] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0041] Figure 5 is with Figure 3 Schematic diagram of the structure at different angles;

[0042] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0043] Figure 7 is with Figure 3 , Figure 5 Schematic diagram of the structure at different angles;

[0044] Figure 8 yes Figure 7 A partial enlarged view of point C in the middle;

[0045] Fig. 9 It is a structural schematic diagram of a fixing rod, a clamping block and related parts;

[0046] Fig.10 It is a partial structural schematic diagram of the support assembly;

[0047] Fig.11 It is a schematic diagram of the structure of the base;

[0048] Fig.12 It is a reference diagram of the usage status of an embodiment of the present invention.

[0049] In the accompanying drawings, the list of components represented by each number is as follows: 1. Base; 2. Telescopic arm; 3. Support assembly; 5. Block; 6. Fixed shaft; 7. Roller; 10. Scale line; 101. Slide; 102. Guide column; 103. Limit opening; 201. Telescopic arm body; 202. Groove; 203. Guide groove; 204. Boss; 205. Convex opening; 206. Side plate; 207. Horizontal plate; 301. Support rod; 302. Arc plate; 303. Support layer; 304. Disc; 305. Insert rod; 306. Slot; 401. Limit shaft; 402. Stop rod; 403. Limit block; 404. Inclined surface; 405. Collision block; 501. Spring; 502. Fixed rod. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0051] See also Figure 1-Figure 12 , an anti-deformation device for air duct welding, characterized in that it comprises a base 1, four slideways 101 distributed in a cross shape are arranged in the base 1, telescopic arms 2 are slidably arranged in the four slideways 101, and the outer ends of the telescopic arms 2 are all provided with support components 3;

[0052] The support assembly 3 includes a support layer 303 made of asbestos material and in contact with the inner wall of the air duct;

[0053] It also includes a locking member for fixing the telescopic arm 2 .

[0054] The base 1 may be a cross-shaped rod, and the slideway 101 is arranged on four supporting rods.

[0055] The support assembly 3 is slidably disposed on the telescopic arm 2 , and also includes a limiting member 4 for limiting the movement of the support assembly 3 .

[0056] The support assembly 3 includes two support rods 301 arranged above the outer end of the telescopic arm 2, and one end of the two support rods 301 is installed at the middle position of the telescopic arm 2;

[0057] The outer sides of the two support rods 301 are both provided with an arc-shaped plate 302 with a convex middle, and the outer sides of the arc-shaped plates 302 are both provided with a support layer 303. The outermost end of the support layer 303 is located outside the arc-shaped plate 302 and the support rod 301. The arc-shaped plate 302 is generally made of a deformable material with a certain hardness, such as memory alloy, spring 501 steel, or thermoplastic elastic material. In this way, it can be ensured that the support layer 303 first contacts the inner wall of the air duct.

[0058] The support layer 303 is composed of a plurality of spheres bonded to the outside of the arc-shaped plate 302, and two adjacent spheres are in contact with each other. The cross-section of the spheres is circular or elliptical and is made of asbestos material.

[0059] The locking member is a clamping block 5, and the telescopic arm 2 includes a telescopic arm body 201. A groove 202 is provided at the lower middle position of the telescopic arm body 201 along the length direction of the slideway 101. A fixing rod 502 is provided in the groove 202. The fixing rod 502 is rotatably provided at the middle position of the two side walls of the groove 202 through a fixing shaft 6. A clamping block 5 is provided below the inner end of the fixing rod 502. The upper inner end of the fixing rod 502 is fixed to the inner wall of the groove 202 through a spring 501.

[0060] A plurality of limit openings 103 cooperating with the clamping block 5 are arranged on the bottom wall of the slideway 101 at intervals along the length direction of the slideway 101;

[0061] The spring 501 is not subjected to external force, and the block 5 is clamped in the limit opening 103. The outer end of the fixing rod 502 is pressed downward, the spring 501 is compressed, the block 5 is lifted up and separated from the limit opening 103, and the fixing rod 502 can rotate around the fixing shaft 6. There is a gap between the upper end surface of the groove 202 and the fixing rod 502 to allow the fixing rod 502 to rotate.

[0062] The lower sides of the telescopic arm body 201 are symmetrically provided with guide grooves 203 along the length direction of the slideway 101, and the bottom wall of the slideway 101 is symmetrically provided with guide posts 102 that cooperate with the guide grooves 203. The cooperation between the guide grooves 203 and the guide posts 102 improves the stability of the telescopic arm body 201 during the sliding process.

[0063] The two support rods 301 are rotatably mounted on the upper end surface of the telescopic arm body 201 . The two support rods 301 can be stored in the slideway 101 and can be stored in the space above the slideway 101 when not in use.

[0064] The two support rods 301 are generally connected by bolts, and the connecting ends of the two support rods 301 are fixedly provided with disks 304, one disk 304 is evenly distributed with a plurality of slots 306, and the other disk 304 is evenly distributed with a plurality of insertion rods 305 matching the slots 306. According to the correspondence between different insertion rods 305 and slots 306, the relative position between the two disks 304 can be adjusted, and the bolts need to be loosened before adjustment.

[0065] The outer surface of the telescopic arm body 201 is provided with scale lines 10. The scale lines 10 can be used to read the extension length of the telescopic arm 2.

[0066] The upper end surface of the telescopic arm body 201 is provided with a boss 204 along the length direction of the slideway 101, and the boss 204 is penetrated by a convex opening 205, and a roller 7 is slidably arranged at the bottom of the convex opening 205. The upper end of the bracket of the roller 7 extends out of the convex opening 205 and two support rods 301 are arranged at the extended end.

[0067] Side plates 206 are symmetrically arranged on both sides of the upper part of the telescopic arm body 201, and horizontal plates 207 are fixedly arranged above the two side plates 206, with a gap between the two horizontal plates 207;

[0068] The stopper 4 includes a collision block 405 slidably disposed in the interval, and the collision block 405 is fixedly mounted on the roller 7 bracket and is located below the support rod 301;

[0069] The limiting member 4 also includes a plurality of limiting shafts 401 symmetrically arranged on the telescopic arm body 201 and evenly spaced along the length direction of the slideway 101, and limiting blocks 403 are rotatably arranged on the limiting shafts 401. A stopper 402 corresponding to the limiter blocks 403 is arranged on the telescopic arm body 201 and between two adjacent limiting shafts 401 on the same side, and the stopper 402 is located on the inner side of the limiter blocks 403;

[0070] When the collision block 405 moves from the inside of the slide 101 to the outside, the collision block 405 contacts the limit block 403, pushing the limit block 403 to rotate, and the collision block 405 moves outward smoothly; when the collision block 405 moves from the outside of the slide 101 to the inside, the collision block 405 contacts the limit block 403, the blocking rod 402 limits the rotation of the limit block 403, and the collision block 405 is blocked and cannot move inward.

[0071] The contact surface between the inner side of the limiting block 403 and the collision block 405 is an inclined surface 404 .

[0072] Directions:

[0073] Before the duct welding construction begins, first take out one telescopic arm 2 of the device. During the taking out process, the outer end of the fixing rod 502 needs to be pressed down, so that the block 5 at the other end of the fixing rod 502 will be tilted up, thereby disengaging from the limit opening 103 on the base 1, and the telescopic arm 2 can move freely. After being extended to a position suitable for the size of the duct, the fixing rod 502 is released, and the buckle on the other side rebounds under the action of the spring 501 and is inserted into the limit opening 103 on the base 1, thus achieving the clamping fixation (repeat this step for the other three telescopic arms 2).

[0074] Adjust the two support rods 301 to rotate to a suitable angle so that the slots 306 are connected to the corresponding plug rods 305, and then fix them with bolts (repeat this step for the other three pairs of support rods 301).

[0075] Place the device in the air duct, and then slide the support assembly 3 until the asbestos support layer 303 is in close contact with the inner wall of the air duct and the collision block 405 moves from the inside of the slideway 101 to the outside during the sliding process of the support assembly 3, and the collision block 405 contacts the limit block 403, pushing the limit block 403 to rotate, and the support assembly 3 is smoothly moved outward. When the asbestos support layer 303 is deformed and pressed against the inner wall of the air duct, stop sliding the support assembly 3. At this time, due to the existence of the stop rod 402, the support assembly 3 cannot be moved back (repeat this step for the adjustment of the other three support assemblies 3).

[0076] This device can be used in multiple combinations according to the length of the duct welding. In addition, after the duct welding is completed, the support assembly 3 is turned upward, and the limit block 403 rotates downward under the action of gravity. The support assembly 3 can be reset under the action of gravity or manually assisted.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-deformation device for air duct welding, characterized in that: It comprises a base, wherein four slideways distributed in a cross shape are arranged in the base, telescopic arms are slidably arranged in the four slideways, and the outer ends of the telescopic arms are all provided with support components; The support assembly includes a support layer made of asbestos material and in contact with the inner wall of the air duct; Also included is a locking member for fixing the telescopic arm; The support assembly is slidably disposed on the telescopic arm, and further comprises a limiting member for limiting the movement of the support assembly; The support assembly includes two support rods arranged above the outer end of the telescopic arm, and one end of the two support rods is installed at the middle position of the telescopic arm; The outer sides of the two support rods are each provided with an arc-shaped plate convex in the middle, and the outer sides of the arc-shaped plates are each provided with the support layer; The telescopic arm comprises a telescopic arm body, the upper end surface of the telescopic arm body is provided with a boss along the length direction of the slideway, the boss is provided with a convex opening, a roller is slidably provided at the bottom of the convex opening, the upper end of the roller bracket extends out of the convex opening and two support rods are provided at the extended end; Side plates are symmetrically arranged on both sides above the telescopic arm body, and horizontal plates are fixedly arranged above the two side plates, with a gap between the two horizontal plates; The limiting member comprises a collision block slidably arranged in the interval, and the collision block is fixedly mounted on the bracket of the roller and is located below the support rod; The limiting member also includes a plurality of limiting shafts symmetrically arranged on the telescopic arm body and evenly spaced along the length direction of the slideway, and the limiting shafts are rotatably provided with limiting blocks, and a stopper rod corresponding to the limiting blocks is arranged on the telescopic arm body and between two adjacent limiting shafts located on the same side, and the stopper rod is located on the inner side of the limiting block; When the collision block moves from the inside of the slide to the outside, the collision block contacts the limit block and pushes the limit block to rotate; when the collision block moves from the outside of the slide to the inside, the collision block contacts the limit block and the blocking rod limits the rotation of the limit block.

2. The anti-deformation device for duct welding according to claim 1, characterized in that: The supporting layer is composed of a plurality of spheres bonded to the outer side of the arc-shaped plate, and two adjacent spheres are in contact with each other.

3. The anti-deformation device for duct welding according to claim 2, characterized in that: The locking member is a block, a groove is provided at the middle position below the telescopic arm body along the length direction of the slideway, a fixing rod is provided in the groove, the fixing rod is rotatably provided at the middle position of the two side walls of the groove through a fixing shaft, the block is provided below the inner end of the fixing rod, and the upper part of the inner end of the fixing rod is fixed to the inner wall of the groove by a spring; A plurality of limit openings cooperating with the clamping block are arranged on the bottom wall of the slideway at intervals along the length direction of the slideway; The spring is not subjected to external force, and the clamping block is clamped in the limiting opening.

4. The anti-deformation device for duct welding according to claim 3, characterized in that: Guide grooves are symmetrically arranged on both sides below the telescopic arm body along the length direction of the slide, and guide columns cooperating with the guide grooves are symmetrically arranged on the bottom wall of the slide.

5. The anti-deformation device for duct welding according to claim 3, characterized in that: The two support rods are rotatably mounted on the upper end surface of the telescopic arm body, and the two support rods can be received in the slideway.

6. The anti-deformation device for duct welding according to claim 3, characterized in that: The outer surface of the telescopic arm body is provided with scale lines.

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