Supporting device for stainless steel air pipe welding

Abstract

The utility model discloses a supporting device for welding a stainless steel air duct, which belongs to the technical field of air duct welding, and adopts the technical scheme that the supporting device for welding the stainless steel air duct is characterized by comprising a base, four slideways distributed in a cross shape are arranged in the base, telescopic arms are arranged in the four slideways in a sliding manner, and the telescopic arms are arranged on the base. Supporting assemblies are arranged at the outer ends of the telescopic arms; the supporting assembly comprises a supporting layer which is made of asbestos materials and makes contact with the inner wall of the air pipe. And the locking piece is used for fixing the telescopic arm. The stainless steel welding air pipe has the advantages that the supporting layer is made of fire-resistant asbestos materials, the stainless steel welding air pipe is internally supported, welding operation is not affected, and sinking deformation can be avoided as much as possible.

Description

Technical Field

[0001] The utility model belongs to the technical field of air duct welding, and particularly relates to a support device for stainless steel air duct welding. Background Technique

[0002] Stainless steel welded air ducts are generally used for kitchen fume exhaust ducts or various environments requiring corrosion resistance. Usually, food-grade stainless steel is 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 process of stainless steel welded air ducts, we often find that due to the existence of welding residual stress, the air ducts are sunken and deformed, making it difficult to butt the stainless steel pipe materials on both sides parallel to each other during subsequent welding construction. At the same time, the surrounding area of the weld is also sunken and deformed, extremely affecting the visual quality of the completed pipe. At the same time, the deformation will increase the welding difficulty during the construction process, and the weld may be incomplete or have missed welding, etc., affecting the construction quality.

[0004] At the present stage during the construction process, to solve the welding residual stress, the following methods are generally adopted:

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

[0006] Adopt the method of preheating the pipeline, but for on-site construction, it is very difficult to preheat the pipeline. 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 to be placed inside the pipeline and support the inner wall of the stainless steel air duct to resist the sunken deformation during the welding process. Content of the Utility Model

[0008] The purpose of the utility model is to provide a support device for stainless steel air duct welding, which applies a support force from the inside of the air duct to resist the sunken deformation during the welding of the pipeline, so as to reduce the sunken deformation of the air duct after welding is completed.

[0009] The utility model is realized by the following measures: A support device for stainless steel air duct welding, characterized in that it includes a base, four sliding channels distributed in a cross shape are arranged inside the base, telescopic arms are slidably arranged in the four sliding channels, and support components are arranged at the outer ends of the telescopic arms;

[0010] The support component 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 installed on the upper end surface of the telescopic arm body, and the two support rods can be received into 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. Discs are fixedly arranged at the connecting ends of the two support rods. A number of slots are circumferentially distributed on one disc, and a number of insertion rods matching the slots are circumferentially distributed on the other disc. According to the correspondence between different insertion rods and slots, the relative position between the two discs can be adjusted, and the bolts need to be loosened before adjustment.

[0023] Scale lines are arranged on the outer surface of the telescopic arm body. The scale lines can be used to read out the extended length of the telescopic arm.

[0024] A convex platform is arranged on the upper end surface of the telescopic arm body along the length direction of the slideway. A convex opening is penetrated through the convex platform. A roller is slidably arranged at the bottom of the convex opening. The upper end of the bracket of the roller extends out of the convex opening and two support rods are arranged at the extending end.

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

[0026] The limiting member includes a collision block slidably arranged in the gap. The collision block is fixedly installed on the roller bracket and is located below the support rod;

[0027] The limiting member further includes a number of limiting shafts symmetrically arranged on the telescopic arm body and evenly distributed at intervals along the length direction of the slideway. Limiting blocks are rotatably arranged on the limiting shafts. A stop rod corresponding to each limiting block is arranged between two adjacent limiting shafts on the same side of the telescopic arm body, and the stop rod is located inside the limiting block;

[0028] When the collision block moves outward from the inside of the slideway, the collision block contacts the limiting block, pushes the limiting block to rotate, and the collision block moves out smoothly; when the collision block moves inward from the outside of the slideway, the collision block contacts the limiting block, and the stop rod restricts the rotation of the limiting block, and the collision block is blocked and cannot move inward.

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

[0030] Usage method:

[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 other 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 utility model 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 utility model, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0038] Figure 2 It is a structural schematic diagram of the telescopic arm body in an embodiment of the utility model;

[0039] Figure 3 is a schematic structural view of the support assembly in an embodiment of the present utility model;

[0040] Figure 4 is Figure 3 a partially enlarged view at position A in

[0041] Figure 5 is different in angle from Figure 3 a schematic structural view;

[0042] Figure 6 is Figure 5 a partially enlarged view at position B in

[0043] Figure 7 is different in angle from Figure 3 and Figure 5 a schematic structural view;

[0044] Figure 8 is Figure 7 a partially enlarged view at position C in

[0045] Figure 9 is a schematic structural view of the fixed rod, the clamping block and their related parts;

[0046] Figure 10 is a partial schematic structural view of the support assembly;

[0047] Figure 11 is a schematic structural view of the base;

[0048] Figure 12 is a reference view of the usage state of an embodiment of the present utility model.

[0049] In the drawings, the list of components represented by each reference numeral is as follows: 1. Base; 2. Telescopic arm; 3. Support assembly; 5. Clamping block; 6. Fixed shaft; 7. Roller; 10. Scale line; 101. Slideway; 102. Guide post; 103. Limit port; 201. Telescopic arm body; 202. Groove; 203. Guide groove; 204. Boss; 205. Convex port; 206. Side plate; 207. Horizontal plate; 301. Support rod; 302. Arc plate; 303. Support layer; 304. Disc; 305. Plug rod; 306. Socket; 401. Limit shaft; 402. Stop rod; 403. Limit block; 404. Inclined surface; 405. Collision block; 501. Spring; 502. Fixed rod. Detailed implementation manners

[0050] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with embodiments. Of course, the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0051] See Figures 1 - 12 , a support device for welding stainless steel air ducts, characterized in that it includes a base 1, four slideways 101 distributed in a cross shape are arranged in the base 1, a telescopic arm 2 is slidably arranged in the four slideways 101, and support components 3 are arranged at the outer ends of the telescopic arm 2;

[0052] The support component 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 can be a cross-shaped rod, and the slideways 101 are arranged on the four support rods.

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

[0056] The support component 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] Arc-shaped plates 302 with outward convex middles are arranged on the outer sides of the two support rods 301, and support layers 303 are arranged on the outer sides of the arc-shaped plates 302. The outermost ends of the support layers 303 are located outside the arc-shaped plates 302 and the support rods 301. The arc-shaped plates 302 are generally made of a deformable material with a certain hardness, such as shape memory alloy, spring 501 steel, or thermoplastic elastomer material. This can ensure that the support layer 303 contacts the inner wall of the air duct first.

[0058] The support layer 303 is composed of a number of spheres bonded to the outer side of the arc-shaped plate 302, and adjacent spheres are in contact with each other. The cross-sectional shape of the sphere is circular or elliptical and is made of asbestos material.

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

[0060] A number of limiting openings 103 cooperating with the latch 5 are arranged at intervals along the length direction of the bottom wall of the slideway 101;

[0061] The spring 501 is not under external force, and the clamping block 5 is clamped in the limiting opening 103. When the outer end of the fixing rod 502 is pressed downwards, the spring 501 is compressed, the clamping block 5 tilts upwards and disengages from the limiting opening 103, and the fixing rod 502 can rotate around the fixed 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] On both sides below the telescopic arm body 201, guide grooves 203 are symmetrically arranged along the length direction of the slideway 101, and guide posts 102 matching the guide grooves 203 are symmetrically arranged on the bottom wall of the slideway 101. The cooperation of the guide grooves 203 and the guide posts 102 improves the stability of the telescopic arm body 201 during the sliding process.

[0063] Two support rods 301 are rotatably installed on the upper end surface of the telescopic arm body 201, and the two support rods 301 can be retracted into the slideway 101 and can be stored in the upper space of the slideway 101 when not in use.

[0064] The two support rods 301 are generally connected by bolts. Discs 304 are fixedly arranged at the connecting ends of the two support rods 301. A number of slots 306 are circumferentially distributed on one disc 304, and a number of insertion rods 305 matching the slots 306 are circumferentially distributed on the other disc 304. According to the correspondence of different insertion rods 305 and slots 306, the relative position between the two discs 304 can be adjusted, and the bolts need to be loosened before adjustment.

[0065] Scale lines 10 are arranged on the outer surface of the telescopic arm body 201. The scale lines 10 can be used to read out the extended length of the telescopic arm 2.

[0066] On the upper end surface of the telescopic arm body 201, a boss 204 is arranged along the length direction of the slideway 101. A convex opening 205 penetrates through the boss 204. 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 above the telescopic arm body 201. A horizontal plate 207 is fixedly arranged above the two side plates 206, and there is a gap between the two horizontal plates 207;

[0068] The limiting member 4 includes a collision block 405 slidably arranged in the gap. The collision block 405 is fixedly installed on the bracket of the roller 7 and is located below the support rod 301;

[0069] The limiting member 4 further includes a plurality of limiting shafts 401 symmetrically arranged on the telescopic arm body 201 and evenly distributed at intervals along the length direction of the slideway 101. Limiting blocks 403 are rotatably arranged on the limiting shafts 401. Between two adjacent limiting shafts 401 on the same side of the telescopic arm body 201, there are retaining rods 402 corresponding to the limiting blocks 403 one by one. The retaining rods 402 are located inside the limiting blocks 403.

[0070] When the collision block 405 moves outward from the inside of the slideway 101, the collision block 405 contacts the limiting block 403, pushing the limiting block 403 to rotate, and the collision block 405 moves out smoothly; when the collision block 405 moves inward from the outside of the slideway 101, the collision block 405 contacts the limiting block 403, and the retaining rod 402 restricts the rotation of the limiting 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] Usage method:

[0073] Before the air duct welding construction starts, first take out one telescopic arm 2 of the device. During the taking-out process, press the outer end of the fixing rod 502 downward, so that the clamping block 5 at the other end of the fixing rod 502 will tilt up and thus disengage from the limiting port 103 on the base 1, and the telescopic arm 2 can move freely. After extending to a position suitable for the size of the air duct, release the fixing rod 502, and the buckle on the other side rebounds under the action of the spring 501 and inserts into the limiting port 103 on the base 1 to achieve clamping and fixing (repeat this step for the other three telescopic arms 2).

[0074] Adjust the two support rods 301 to rotate to a suitable angle, connect the slot 306 and the corresponding insertion rod 305, and then fix them with bolts (repeat this step for the other three pairs of support rods 301).

[0075] Place the device inside the air duct, and then slide the support assembly 3 until the support layer 303 made of asbestos comes into close contact with the inner wall of the air duct. During the sliding process of the support assembly 3, the collision block 405 moves outward from the inside of the slideway 101, the collision block 405 contacts the limiting block 403, pushing the limiting block 403 to rotate, and the support assembly 3 moves out smoothly. When the support layer 303 made of asbestos deforms and abuts against the inner wall of the air duct, stop sliding the support assembly 3. At this time, due to the existence of the retaining rod 402, the support assembly 3 cannot move back (repeat this adjustment step for the other three support assemblies 3).

[0076] This device can be selected and used in multiple combinations according to the length of the welded joint of the air duct. In addition, after the air duct welding is completed, turn the support assembly 3 upward, and the limiting block 403 rotates downward under the action of gravity. At this time, the support assembly 3 can reset under the action of gravity or be manually assisted to reset.

[0077] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A support device for stainless steel 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.

2. The support device for stainless steel air duct welding according to claim 1 is characterized in that: 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.

3. The support device for stainless steel air duct welding according to claim 2 is 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.

4. The support device for stainless steel air duct welding according to claim 1 is characterized in that: 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; 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.

5. The support device for stainless steel air duct welding according to claim 4 is characterized in that: Guide grooves are symmetrically arranged on both sides below the telescopic arm body along the length direction of the slideway, and guide columns cooperating with the guide grooves are symmetrically arranged on the bottom wall of the slideway.

6. The support device for stainless steel air duct welding according to claim 3 is 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.

7. The support device for stainless steel air duct welding according to claim 4, characterized in that: The outer surface of the telescopic arm body is provided with scale lines.

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