A welding device for processing the casing of a heat pump unit

Abstract

This invention provides a welding device for processing the casing of a heat pump unit, relating to the field of heat pump unit casing welding technology. It includes multiple mounting holes equally spaced on a worktable, with a positioning seat slidably mounted within each mounting hole. Multiple sealing holes are equally spaced on the positioning seat, and a pressure rod is slidably connected to each sealing hole. A push plate is mounted on the lower end of each pressure rod, and a synchronization disc is fitted onto each of the multiple pressure rods. A pressure plate is located on the upper end of the synchronization disc, and a connecting rod is mounted on each pressure rod. Multiple synchronization grooves are equally spaced on the synchronization disc, and synchronization grooves and pressure grooves are staggered on the pressure plate. This multi-point synchronous fixing system, employing a combination of hydraulic transmission and mechanical linkage, achieves uniform pressure on the casing. This design fundamentally solves the problem of casing deformation easily caused by traditional single-point fixing, ensuring the stability and flatness of the casing during welding.

Description

Technical Field

[0001] This invention relates to the field of heat pump unit casing welding technology, and more specifically, to a welding apparatus for processing heat pump unit casings. Background Technology

[0002] In the context of the rapid development of the heat pump industry, the manufacturing process quality of the heat pump unit casing directly affects the product's performance and service life. During casing processing and welding, in order to ensure welding accuracy and product quality, it is necessary to reliably fix the casing and its related components. This seemingly basic fixing process actually involves complex process requirements, because the heat pump unit casing is usually made of thin metal materials with high flexibility and deformation sensitivity. The choice of fixing method directly affects the success of the entire processing.

[0003] However, the fixing methods commonly used in the industry have obvious technical limitations. Traditional fixing methods mainly rely on mechanical fasteners such as bolts to fix the unit at a single point. This single-point force fixing method will cause stress concentration on the surface of the shell. Due to the special nature of the heat pump unit shell material, excessive stress concentration can easily lead to physical damage such as deformation, wrinkles or even cracks in the shell. This will not only reduce the appearance quality of the product, but also affect the welding accuracy and the overall performance of the product. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the problems existing in the prior art, the present invention provides a welding device for processing the casing of a heat pump unit, thereby solving the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding device for processing the casing of a heat pump unit, comprising a workbench installed on an external device; and a fixing mechanism, the fixing mechanism comprising multiple mounting holes equally spaced on the workbench, a positioning seat slidably mounted in the mounting holes, multiple sealing holes equally spaced on the positioning seat, a pressure rod slidably connected in each sealing hole, a push plate mounted on the lower end of the pressure rod, a synchronous disc fitted onto the multiple pressure rods, and a pressure plate provided at the upper end of the synchronous disc, a connecting rod mounted on each pressure rod, multiple synchronous grooves equally spaced on the synchronous disc, synchronous grooves and pressure grooves alternately spaced on the pressure plate, the pressure plate pressing on the connecting rod, a top rod slidably connected in the pressure groove, and the top rod connected to the connecting rod; and a limiting mechanism, the limiting mechanism comprising a transverse tube mounted on the positioning seat and connected to an inner connecting pipe, an adjusting rod rotatably connected in the transverse tube, a drive wheel mounted on the adjusting rod, and an adjusting hole provided on the adjusting rod.

[0008] Preferably, the fixing mechanism further includes an inner connecting pipe installed in the positioning seat. The inner connecting pipe is internally threaded with an inner threaded tube, and an inner sleeve is installed on the inner threaded tube. The synchronous disc is slidably connected to the inner sleeve, and a pull sleeve is rotatably installed in the inner sleeve. The pull sleeve is threadedly connected to the pressure plate. This multi-layer nested design achieves stable pressure transmission through the threaded engagement of the inner connecting pipe and the inner threaded tube, combined with the slidable connection between the inner sleeve and the synchronous disc.

[0009] Preferably, the inner threaded tube has a hexagonal groove, the upper end of the pull sleeve has a follower groove, a hexagonal head is limited and connected in the hexagonal groove, an extension rod is connected to the hexagonal head, and the extension rod is connected to the electric wrench. Through the cooperation of the hexagonal groove and the hexagonal head, and in conjunction with the power output of the electric wrench, automatic pressure adjustment is realized. At the same time, the design of the follower groove provides multi-level adjustment function, improving operating efficiency.

[0010] Preferably, two sets of fixed sleeves set at 90 degrees are connected and installed inside the positioning seat. The fixed sleeves are connected inside the positioning seat, and a telescopic rod is slidably installed inside the fixed sleeve. A top rod is installed on the telescopic rod. This orthogonally arranged fixing structure achieves multi-directional support for the shell through the cooperation of the telescopic rod and the top rod, effectively preventing deformation during the welding process.

[0011] Preferably, an energy storage tank is connected to the positioning seat, a piston disc is slidably installed inside the energy storage tank, a spring is installed on the piston disc, two intermediate discs are installed at equal intervals on the spring, a sealing disc is threaded inside the energy storage tank, and the spring abuts against the sealing disc. Through the cooperation between the energy storage tank and the piston disc, combined with the multi-stage design of the spring and intermediate discs, precise pressure control and energy release are achieved.

[0012] Preferably, the sealing disc has a fitting hole, and the intermediate disc near the sealing disc has a through hole. The diameter of the fitting hole is larger than the diameter of the through hole. A fitting rod is threaded onto the fitting hole, and an abutment rod is coaxially mounted on the fitting rod. The abutment rod passes through the through hole and rests against the intermediate disc. This precise hole diameter matching design, through the coordinated work of the fitting rod and the abutment rod, realizes the adjustment of spring pressure and ensures the controllability of the fixing force.

[0013] Preferably, the fitting rod has an internal groove, and the internal groove, the hexagonal groove, the follower groove, and the hexagonal head are all of the same size. Through the unified size design, the versatility of the components is achieved, and the maintenance efficiency and ease of use of the device are improved.

[0014] Preferably, the limiting mechanism further includes a driven wheel meshing with the driving wheel, and a bottom rod is installed on the driven wheel. The bottom rod is slidably connected in the inner connecting tube. Through the meshing transmission of the driving wheel and the driven wheel, combined with the limiting sliding design of the bottom rod, the transmission of rotational force and stable position control are realized.

[0015] Preferably, a bottom plate is fixedly installed at the lower end of the inner connecting tube, and multiple bottom blocks are slidably installed on the bottom plate. A rotating disk is slidably connected to the bottom plate, and the bottom rod is connected to the rotating disk. This multi-layered motion structure achieves precise positioning of the bottom blocks through the cooperation of the bottom plate and the rotating disk.

[0016] Preferably, the rotating disk is equipped with a threaded strip, and multiple bottom blocks are threadedly connected to the threaded strip. The multiple bottom blocks are locked at the lower end of the mounting hole. Through the threaded engagement between the threaded strip and the bottom blocks, the synchronous movement and precise positioning of the bottom blocks are achieved, ensuring the stability and reliability of the entire device.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a welding device for processing the casing of a heat pump unit, which has the following advantages:

[0019] The multi-point synchronous fixing system uses a combination of hydraulic transmission and mechanical linkage to achieve uniform pressure on the shell. This design fundamentally solves the problem of shell deformation caused by traditional single-point fixing, and ensures the stability and flatness of the shell during the welding process.

[0020] The innovative pressure regulation mechanism achieves precise pressure control through the cooperation of the energy storage tank and spring assembly. The system, with its replaceable abutment rod and multi-stage spring design, can flexibly adjust the fixed pressure according to the characteristics of different shell materials, avoiding damage to the shell caused by excessive pressure.

[0021] The unique limiting mechanism adopts the principle of helical transmission. Through the meshing transmission of the driving wheel and the driven wheel, combined with the cooperation of the threaded strip and the bottom block, the positioning seat is positioned. This design not only improves the accuracy of fixing, but also enhances the stability of the entire device.

[0022] The innovative design of the hydraulic transmission system achieves multi-directional support for the shell through the cooperation of the fixed sleeve and the telescopic rod. The two sets of 90-degree fixed devices provide all-round support force, effectively preventing the deformation and displacement of the shell during the welding process.

[0023] Overall, this innovative welding fixing device achieves safe fixing of the heat pump unit casing during the welding process through multiple protection mechanisms. Its precise pressure control, uniform force distribution, and flexible adjustment function provide a brand-new solution for the welding processing of heat pump unit casings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a welding device for processing the casing of a heat pump unit according to the present invention;

[0025] Figure 2 This is a schematic diagram of the positioning seat in this invention;

[0026] Figure 3 This is a cross-sectional view of the positioning seat in this invention;

[0027] Figure 4 This is a schematic diagram of the structure of the pressure rod, the synchronizing plate, and the pressure plate in this invention;

[0028] Figure 5 This is a cross-sectional view of the internal spiral tube in this invention;

[0029] Figure 6 This is a cross-sectional view of the positioning seat and fixing sleeve in this invention;

[0030] Figure 7 This is a cross-sectional view of the bottom plate in this invention;

[0031] Figure 8 This is an exploded structural diagram of the sealing disc and the bonding rod in this invention.

[0032] In the diagram: 11. Workbench; 21. Mounting hole; 22. Positioning seat; 23. Sealing hole; 24. Pressure rod; 25. Push plate; 26. Synchronizing plate; 27. Pressure plate; 28. Connecting rod; 29. ​​Synchronizing groove; 31. Inner connecting pipe; 32. Transverse pipe; 33. Adjusting rod; 34. Driving wheel; 35. Adjusting hole; 36. Driven wheel; 37. Bottom rod; 38. Bottom plate; 39. Bottom block; 210. Pressure groove; 211. Top rod; 212. Internal threaded tube; 213. 214. Inner sleeve; 215. Pull sleeve; 216. Hexagonal groove; 217. Follower groove; 218. Hexagonal head; 219. Extension rod; 220. Fixing sleeve; 221. Telescopic rod; 222. Top rod; 223. Energy storage tank; 224. Piston disc; 225. Spring; 226. Intermediate disc; 227. Sealing disc; 228. Fitting hole; 229. Through hole; 230. Fitting rod; 231. Abutment rod; 310. Internal groove; 311. Rotating disc; 312. Threaded strip. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0035] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0036] Please see Figures 1 to 8A welding device for processing the casing of a heat pump unit includes a workbench 11 installed on an external device; it also includes a fixing mechanism, which includes multiple mounting holes 21 evenly spaced on the workbench 11, a positioning seat 22 slidably installed in the mounting holes 21, multiple sealing holes 23 evenly spaced on the positioning seat 22, a pressure rod 24 slidably connected in each sealing hole 23, a push plate 25 installed at the lower end of the pressure rod 24, a synchronous disc 26 fitted onto the multiple pressure rods 24, and a pressure plate 27 provided at the upper end of the synchronous disc 26, a connecting rod 28 installed on each pressure rod 24, and multiple sealing holes 27 evenly spaced on the synchronous disc 26. Synchronous groove 29 and pressure groove 210 are alternately provided on pressure plate 27. Pressure plate 27 presses on connecting rod 28. Top rod 211 is slidably connected in pressure groove 210 and connected to connecting rod 28. The fixing mechanism also includes inner connecting tube 31 installed in positioning seat 22. Inner threaded tube 212 is connected to inner threaded tube 212. Inner sleeve 213 is installed on inner threaded tube 212. Synchronous disc 26 is limited and slidably connected in inner sleeve 213. Pull sleeve 214 is rotatably installed in inner sleeve 213 and threadedly connected to pressure plate 27. Hexagonal groove 215 is opened in inner threaded tube 212. Pull sleeve 214 is rotatably installed in inner sleeve 213. Pull sleeve 214 is threaded on pressure plate 27. Hexagonal groove 215 is opened in inner threaded tube 212. The end has a follower groove 216, and a hexagonal head 217 is limited and connected in the hexagonal groove 215. An extension rod 218 is connected to the hexagonal head 217 and is connected to an electric wrench. Two sets of fixed sleeves 219 set at 90 degrees are connected and installed in the positioning seat 22. The fixed sleeves 219 are connected in the positioning seat 22. A telescopic rod 220 is slidably installed in the fixed sleeve 219. A top rod 221 is installed on the telescopic rod 220. An energy storage tank 222 is connected and installed in the positioning seat 22. A piston disc 223 is slidably installed in the energy storage tank 222. A spring 224 is installed on the piston disc 223. Two intermediate discs 225 are installed at equal intervals on the spring 224. The energy storage tank 222 has a sealing disc 226 installed on its internal thread. A spring 224 abuts against the sealing disc 226. The sealing disc 226 has a fitting hole 227. The intermediate disc 225 near the sealing disc 226 has a through hole 228. The diameter of the fitting hole 227 is larger than the diameter of the through hole 228. A fitting rod 229 is threadedly connected to the fitting hole 227. An abutting rod 230 is coaxially installed on the fitting rod 229. The abutting rod 230 passes through the through hole 228 and abuts against the intermediate disc 225. The fitting rod 229 has an internal groove 231. The internal groove 231, the hexagonal groove 215, the follower groove 216, and the hexagonal head 217 are all of the same size.

[0037] Before welding the corresponding heat pump unit casing, a limiting action is required. First, the casing is placed on the workbench 11, and then the positioning seat 22 is installed in the mounting hole 21 that fits the casing. At this time, an electric wrench with a hexagonal head 217 is inserted into the adjustment hole 35, which will drive the adjustment rod 33 to rotate. This will drive the bottom rod 37 to rotate synchronously through the drive wheel 34 and the driven wheel 36. Since the bottom rod 37 is connected to the rotating disk 310, it will drive the threaded strip 311 to rotate. Multiple bottom blocks 39 are threadedly connected to the threaded strip 311, which will drive the multiple bottom blocks 39 to slide outward and then limit the bottom blocks 39 to fit against the lower end surface of the workbench 11. At this time, the positioning seat 22 can only rotate along the mounting hole 21, thus completing the limiting process.

[0038] When it is necessary to fix the housing, the hexagonal head 217 is inserted into the hexagonal slot 215, which will drive the internal threaded tube 212 to rotate. Since the internal threaded tube 212 is threaded onto the internal connecting tube 31, it will drive the synchronous disc 26 to move downward. Since the multiple synchronous slots 29 on the synchronous disc 26 are respectively engaged with the pressure rods 24, they will drive the multiple pressure rods 24 to move downward synchronously. The synchronous downward movement of the multiple pressure rods 24 will cause the hydraulic oil in the positioning seat 22 to flow into the multiple fixing sleeves 219. The pressure of the hydraulic oil will push the telescopic rod 220 and the push rod 221 towards the housing, and the two push rods 221 will respectively abut against the housing. On the side wall of the body, the initial fixation of the housing is now complete. Since the full force of the electric wrench is applied to all the pressure rods 24, the pressure will be reduced. When a greater fixing pressure is required, simply move the hexagonal head 217 upward and insert it into the follower groove 216, and then rotate the pull sleeve 214. Since the pull sleeve 214 is limited to the rotational connection in the inner sleeve 213, it will drive the pressure plate 27 to move downward. And the pressure plate 27 is only connected to half of the pressure rods 24 through the connecting rod 28, so the full force of the electric wrench will be applied to half of the pressure rods 24, thus increasing the pressure of the hydraulic oil. Then, the greater pressure ensures the fixing stability of the housing.

[0039] When pressure is applied, it is synchronously transmitted to the energy storage tank 222. The pressure is applied through the spring 224 and the piston disc 223. Different spring forces generated by the spring 224 can produce different pressures. By changing the contact rod 230 of different thicknesses, the contact rod 230 can be fixed to different intermediate discs 225. Taking the contact rod 230 connected to the intermediate disc 225 near the piston disc 223 as an example, when the contact rod 230 is pressed against the intermediate disc 225, the spring 224 is in a fixed state. Only the spring 224 between the intermediate disc 225 and the piston disc 223 can provide pressure. At this time, the effective number of coils of the spring 224 decreases, so the stiffness coefficient increases. The pressure generated for the same displacement distance becomes greater. Therefore, the pressure can be adjusted according to the situation, thereby ensuring the safe fixation of the shell. After the fixation is completed, the shell can be welded accordingly.

[0040] The limiting mechanism includes a transverse tube 32 mounted on the positioning seat 22 and connected to the inner connecting tube 31. An adjusting rod 33 is rotatably connected inside the transverse tube 32. A driving wheel 34 is mounted on the adjusting rod 33. An adjusting hole 35 is opened on the adjusting rod 33. The limiting mechanism also includes a driven wheel 36 meshing with the driving wheel 34. A bottom rod 37 is mounted on the driven wheel 36. The bottom rod 37 is slidably connected inside the inner connecting tube 31. A bottom plate 38 is fixedly mounted at the lower end of the inner connecting tube 31. Multiple bottom blocks 39 are slidably mounted on the bottom plate 38. A rotating plate 310 is slidably connected inside the bottom plate 38. The bottom rod 37 is connected to the rotating plate 310. A threaded strip 311 is mounted on the rotating plate 310. Multiple bottom blocks 39 are threadedly connected to the threaded strip 311, and multiple bottom blocks 39 are locked at the lower end of the mounting hole 21.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for processing of a heat pump unit shell, comprising a worktable (11) installed on an external device; characterized in that: It also includes fixing mechanism, the fixing mechanism includes a plurality of mounting holes (21) equidistantly arranged on the workbench (11), the mounting hole (21) is slidably installed with a positioning seat (22), a plurality of sealing holes (23) are equidistantly arranged on the positioning seat (22), a pressurizing rod (24) is slidably connected in each sealing hole (23), a push disc (25) is installed on the lower end of the pressurizing rod (24), a plurality of pressurizing rods (24) are installed with a synchronous disc (26), and the upper end of the synchronous disc (26) is provided with a pressure plate (27), a connecting rod (28) is installed on each pressurizing rod (24), a plurality of synchronous grooves (29) are equidistantly arranged on the synchronous disc (26), and the synchronous grooves (29) and pressurizing grooves (210) are alternately arranged on the pressure plate (27), the fixing mechanism further includes an inner connecting pipe (31) installed in the positioning seat (22), the inner connecting pipe (31) is threadedly connected with an inner screw pipe (212), the inner screw pipe (212) is installed with an inner sleeve (213), the synchronous disc (26) is limitingly and slidably connected in the inner sleeve (213), a pull sleeve (214) is rotatably installed in the inner sleeve (213), the pull sleeve (214) is threadedly connected with the pressure plate (27), the pressure plate (27) is pressed on the connecting rod (28), a top rod (211) is slidably connected in the pressurizing groove (210), the top rod (211) is connected with the connecting rod (28), the positioning seat (22) is continuously installed with an energy storage tank (222), the energy storage tank (222) is slidably installed with a piston disc (223), the piston disc (223) is installed with a spring (224), the spring (224) is equidistantly installed with two intermediate discs (225), the energy storage tank (222) is threadedly installed with a sealing disc (226), and the spring (224) is abutted on the sealing disc (226); it also includes a limiting mechanism, the limiting mechanism includes a transverse pipe (32) installed on the positioning seat (22) and communicated with the inner connecting pipe (31), a regulating rod (33) is limitingly and rotatably connected in the transverse pipe (32), the regulating rod (33) is installed with a driving wheel (34), and the regulating rod (33) is provided with an adjusting hole (35).

2. The welding device for processing of a heat pump unit casing according to claim 1, characterized in that: The inner screw pipe (212) is provided with a hexagonal groove (215), the upper end of the pull sleeve (214) is provided with a follow-up groove (216), the hexagonal groove (215) is limitingly connected with a hexagonal head (217), the hexagonal head (217) is connected with an extension rod (218), and the extension rod (218) is connected with an electric wrench.

3. The welding apparatus for processing a heat pump unit casing according to claim 2, characterized in that: The positioning seat (22) is continuously installed with two groups of fixed sleeves (219) arranged at 90 degrees, the fixed sleeve (219) is continuously installed in the positioning seat (22), the fixed sleeve (219) is slidably installed with an extension rod (220), and the extension rod (220) is installed with a top rod (221).

4. The welding apparatus for processing a heat pump unit casing according to claim 3, wherein: The sealing disc (226) is provided with a fitting hole (227), the middle disc (225) close to the sealing disc (226) is provided with a through hole (228), the diameter of the fitting hole (227) is larger than that of the through hole (228), the fitting hole (227) is threadedly connected with a fitting rod (229), the fitting rod (229) is coaxially provided with a contact rod (230), and the contact rod (230) is arranged on the middle disc (225) through the through hole (228).

5. The welding apparatus for processing a heat pump unit casing according to claim 4, wherein: the welding apparatus is characterized by: The fitting rod (229) is provided with an internal groove (231), the internal groove (231), the hexagonal groove (215), the follow-up groove (216) and the hexagonal head (217) are of the same size.

6. The welding apparatus for processing a heat pump unit casing according to claim 1, wherein: The limiting mechanism further comprises a driven wheel (36) engaged with the driving wheel (34), and a bottom rod (37) mounted on the driven wheel (36) and limitedly and slidably connected in the inner connecting pipe (31).

7. The welding apparatus for processing a heat pump unit casing according to claim 6, wherein: A bottom disc (38) is fixedly mounted at the lower end of the inner connecting pipe (31), a plurality of bottom blocks (39) are slidably mounted on the bottom disc (38), and a rotating disc (310) is limitedly and slidably connected in the bottom disc (38), and the bottom rod (37) is connected to the rotating disc (310).

8. The welding apparatus for processing a heat pump unit casing according to claim 7, wherein: The rotating disc (310) is provided with a threaded strip (311), and the plurality of bottom blocks (39) are threadedly connected to the threaded strip (311), and the plurality of bottom blocks (39) are clamped at the lower end of the mounting hole (21).

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