Large-diameter water supply pipe hot-melt welding device

Abstract

This invention discloses a hot-melt welding device for large-diameter water supply pipes, the core of which consists of an assembly base, a positioning fixture, a pressurizing component, and a hot-melt component. The positioning fixture is equipped with a sliding base and longitudinal and transverse positioning components, ensuring precise connection of the water supply pipes. The pressurizing component, through a lifting base, a pressurizing unit, and an opening and closing adjustment component, achieves uniform pressure on the welding area, optimizing the welding process. The hot-melt component is responsible for heating the interface, ensuring welding quality. This design significantly improves welding efficiency and connection accuracy. This invention effectively solves the problems of low welding efficiency, poor connection accuracy, and difficulty in guaranteeing welding quality in existing technologies, providing an efficient, precise, and stable technical solution for welding large-diameter water supply pipes.

Description

Technical Field

[0001] This invention relates to the field of water supply pipe welding technology, specifically a hot melt welding device for large-diameter water supply pipes. Background Technology

[0002] With the acceleration of urbanization and the continuous advancement of infrastructure construction, large-diameter water supply pipes are increasingly widely used in municipal engineering, agricultural irrigation, and industrial water supply systems. These pipes are typically made of plastics, particularly high-density polyethylene (HDPE), which is widely used due to its excellent physical and chemical properties. However, during the installation and maintenance of large-diameter water supply pipes, the welding quality directly affects the safe operation and service life of the water supply system. Therefore, improving the efficiency and quality of welding large-diameter water supply pipes has become a pressing technical challenge for the industry.

[0003] Traditional welding of large-diameter water supply pipes often employs manual welding or simple welding equipment. These methods are not only inefficient but also fail to guarantee weld quality, particularly in terms of butt joint precision and weld uniformity. During manual welding, limitations in operator skill, experience, and operating conditions make it difficult to achieve precise butt jointing and uniform heating of the pipe ends. This leads to defects such as uneven fusion and stress concentration at the welded joint, severely impacting the sealing performance of the welded joint and the overall mechanical strength of the pipeline.

[0004] Furthermore, traditional welding methods face significant operational difficulties when welding large-diameter water supply pipes. Due to the size and weight of large-diameter water supply pipes, manual joining and positioning processes are not only labor-intensive but also difficult to achieve high-precision joining and positioning, directly affecting welding quality and efficiency. The difficulty and uncertainty of operations are further increased, especially when welding in the field or in harsh environments.

[0005] Against this backdrop, the market urgently needs a specialized device capable of efficient and high-quality welding of large-diameter water supply pipes to address the problems of low efficiency, poor docking accuracy, and difficulty in guaranteeing welding quality in existing welding methods. Summary of the Invention

[0006] In view of the above-mentioned shortcomings in the existing technology, the purpose of this invention is to provide a hot-melt welding device for large-diameter water supply pipes, which can meet the requirements of high efficiency and high quality welding of large-diameter water supply pipes, and solve the problems of low efficiency, poor docking accuracy and difficulty in guaranteeing welding quality in existing welding methods.

[0007] The technical solution adopted by the present invention to achieve the above objectives is: a large-diameter water supply pipe hot-melt welding device, including an assembly base and a positioning fixture, a pressurizing component, and a hot-melt component for heating the port of the water supply pipe mounted on the assembly base. The positioning fixture includes two sets that are slidably mounted on the assembly base and maintain symmetry. The pressurizing component is coaxially arranged at the center of the two sets of positioning fixtures. The hot-melt component is arranged outside the travel path of one set of positioning fixtures.

[0008] The positioning fixture includes a sliding base, a longitudinal positioning component, a transverse positioning component, and two sets of clamps mounted on the sliding base and arranged symmetrically. The sliding base is slidably mounted on the mounting base. The transverse positioning component and the longitudinal positioning component are both mounted in the sliding base and are poweredly connected to the clamps. The transverse positioning component is used to adjust the distance between the two sets of clamps, and the longitudinal positioning component is used to adjust the height of the clamps.

[0009] The pressurization assembly includes a lifting base, an opening and closing adjustment assembly, and two sets of pressurization units mounted on the lifting base and symmetrically distributed. The lifting base is slidably installed in the mounting base and moves up and down in the vertical direction. The opening and closing adjustment assembly is poweredly connected to the two sets of pressurization units.

[0010] In some implementations, to ensure that the sliding bases of the two sets of positioning fixtures can slide on the assembly base in a stable posture, so as to adjust the travel posture of their respective fixed water supply pipes along the same axis, the following technical solution is provided.

[0011] The assembly base has two sets of sliding guide grooves arranged in the same straight line direction, and the two sets of sliding bases are respectively slidably installed in the two sets of sliding guide grooves.

[0012] It also includes a symmetrical adjustment assembly that is poweredly connected to the sliding base. The symmetrical adjustment assembly includes a drive motor A and an adjusting screw A. The adjusting screw A is rotatably installed in the sliding guide groove and is poweredly connected to the drive motor A assembled inside the mounting base. The adjusting screw A has two threaded grooves arranged in two sets of sliding guide grooves with opposite thread helical directions. The sliding base is screwed into the two threaded grooves on the adjusting screw A.

[0013] In some of these implementations, when the symmetrical adjustment component drives two sets of positioning clamps and the water supply pipe they hold to move along the sliding guide groove, the following technical solution is provided to ensure that the water supply pipe can move stably on the assembly base.

[0014] Both ends of the assembly base are fixedly connected to assembly brackets arranged outside the sliding guide groove. Support guide wheels are rotatably mounted on the assembly brackets, and the support guide wheels and the sliding base are set at the same horizontal height.

[0015] In some implementations, to ensure that the lateral positioning component and the longitudinal positioning component can be stably installed in the sliding base and to achieve their coordinated movement to adjust the horizontal and vertical positions of the two sets of clamps, the following technical solutions are provided.

[0016] The longitudinal positioning component includes a lifting bracket and an adjusting screw B. The lifting bracket is slidably installed in the inner cavity of the sliding base and moves up and down in the vertical direction. The adjusting screw B includes two sets rotatably installed in the inner cavity of the sliding base and arranged in the vertical direction. Each adjusting screw B has a first synchronous pulley fixedly connected to it. The two sets of first synchronous pulleys are connected by a synchronous belt. The lifting bracket and the adjusting screw B are kept in a swivel connection. Both sets of clamps are slidably installed in the lifting bracket and slide in the horizontal direction.

[0017] The lateral positioning assembly includes an adjusting screw C rotatably mounted on the lifting bracket and arranged in the horizontal direction. The adjusting screw C is provided with threaded grooves arranged in opposite directions and respectively engaged with two sets of clamps.

[0018] In some implementations, to ensure the synchronous adjustment of the longitudinal positioning components and the transverse positioning components in the two sets of positioning fixtures, to ensure that the two connected water supply pipes always remain coaxially distributed, and to simplify the adjustment operation of the longitudinal positioning components and the transverse positioning components, the following technical solutions are provided.

[0019] It also includes a first adjustment component and a second adjustment component, which are assembled in the assembly base and linked with the longitudinal positioning component and the transverse positioning component, respectively. The first adjustment component includes a drive motor B and a spline shaft A that are fixedly connected. The second adjustment component includes a drive motor C and a spline shaft B that are fixedly connected. Both the spline shaft A and the spline shaft B are rotatably mounted in the assembly base and pass through the sliding guide groove.

[0020] The longitudinal positioning assembly also includes bevel gear A and bevel gear B. Bevel gear A is rotatably mounted in the sliding base and is slidably inserted into the spline shaft A. Bevel gear B is fixed to one of the adjusting screws B and is engaged with bevel gear A.

[0021] The lateral positioning assembly further includes a splined shaft C, a bevel gear C, a bevel gear D, a bevel gear E, and a bevel gear F. The splined shaft C is rotatably mounted in the inner cavity of the sliding base and arranged in the vertical direction. The bevel gear C is rotatably mounted on the lifting bracket and is slidably inserted into the splined shaft C. The bevel gear D is fixedly connected to the adjusting screw C and is engaged with the bevel gear C. The bevel gear E is rotatably mounted in the sliding base and is slidably inserted into the splined shaft B. The bevel gear F is fixedly mounted on the splined shaft C and is engaged with the bevel gear E.

[0022] In some implementations, to ensure that the lifting base in the pressurizing assembly can move stably up and down in the assembly base, and to ensure that when the first adjustment component drives the longitudinal positioning component to adjust the height of the clamp, the height of the lifting base can be adjusted at the same time, so as to keep the axis of the water supply pipe held by the clamp coincident with the axis of the pressurizing unit on the pressurizing assembly, the following technical solution is provided.

[0023] The assembly base has a lifting guide groove arranged between two sets of sliding guide grooves. The lifting base is slidably installed in the lifting guide groove. The pressurizing component also includes a lifting adjustment component assembled in the lifting guide groove and maintaining a power connection with the lifting base.

[0024] The lifting adjustment assembly includes two sets of adjusting screws D rotatably mounted in the lifting guide groove and arranged in the vertical direction, and a second synchronous pulley fixed to the adjusting screws D. The adjusting screws D are rotatably connected to the lifting base, and the two sets of second synchronous pulleys are powered by a synchronous belt.

[0025] The lifting adjustment assembly also includes bevel gears G and H that are meshed together. The spline shaft A passes through the lifting guide groove. The bevel gear G is fixedly connected to the spline shaft A. The bevel gear H is fixedly connected to one of the adjusting screws D.

[0026] In some implementations, to ensure that the two sets of pressurizing units can be stably installed in the lifting base in a horizontal sliding posture, and to ensure that the opening and closing adjustment component is installed in the lifting base and drives the two sets of pressurizing units to maintain symmetrical movement, the following technical solutions are provided.

[0027] The lifting base is provided with a guide groove, the pressurizing unit includes a sliding support that is slidably installed in the guide groove, and the opening and closing adjustment assembly includes a drive motor D that is connected to the power source and an adjusting screw E. The adjusting screw E is rotatably installed in the guide groove, and the adjusting screw E is provided with two threaded grooves with opposite spiral directions that are respectively connected to two sets of sliding supports.

[0028] In some implementations, the following technical solutions are provided to ensure that the two sets of pressurizing units can uniformly pressurize the connected formula tube when in a closed state.

[0029] The sliding support has a semi-circular assembly opening and a semi-circular assembly groove on the inner wall of the opening. The pressurizing unit also includes a drive motor E, a take-up and release bracket, a pressure wheel, a compression spring, and a semi-circular assembly ring. The assembly ring is rotatably installed in the assembly groove and its outer wall is evenly provided with gear teeth. The take-up and release bracket is rotatably installed on the inner wall of the assembly ring. The pressure wheel is rotatably installed at the end of the take-up and release bracket. The two ends of the compression spring are respectively hinged to the inner wall of the assembly ring and the take-up and release bracket. The drive motor E is fixedly installed in the sliding support, and a bevel gear J that meshes with the gear teeth is fixedly connected to the output shaft of the drive motor E.

[0030] In some implementations, to ensure that the hot melt assembly can be stably installed on the assembly base and work in conjunction with the positioning fixture on the corresponding side to heat and soften the clamped water supply pipe port, the following technical solutions are provided.

[0031] The hot melt assembly includes an assembly column, a drive motor F, an adjusting screw F, a lifting assembly seat, and a hot melt welding head. The assembly column is fixedly installed on the assembly base. The lifting assembly seat is slidably installed in the assembly column and moves up and down in the vertical direction. The adjusting screw is rotatably installed in the assembly column and is screwed to the lifting assembly seat. The drive motor F is fixedly installed on the assembly base and is powered by the adjusting screw F. The hot melt welding head is detachably assembled on the lifting assembly seat.

[0032] The beneficial effects of this invention are: 1. Precise Positioning and Alignment: By employing precision positioning fixtures, including a sliding base, longitudinal and transverse positioning components, and chucks, this device enables rapid and precise positioning of the water supply pipe. These components work together to ensure coaxial alignment of the water supply pipe ends during welding, thereby significantly improving alignment accuracy and reducing welding defects caused by improper alignment.

[0033] 2. High-efficiency hot-melt welding: The hot-melt component in the device can quickly and evenly heat the water supply pipe port to a hot-melt state. This efficient heat control not only shortens the welding time but also ensures uniform weld fusion, improving weld quality.

[0034] 3. Uniform Pressurization: The design of the pressurization component ensures that the pressure is applied evenly to the joint of the water supply pipe during the welding process. The synchronously operating pressurization unit ensures that the welded joint is subjected to uniform pressure during natural cooling and setting, resulting in a welded joint with higher strength and sealing performance.

[0035] 4. High adaptability: With adjustable positioning clamps and pressurizing components, the device can adapt to the welding of water supply pipes with different diameters and wall thicknesses, improving the applicability and flexibility of the equipment.

[0036] 5. High degree of automation: Combining electric drive components and precision adjustment mechanisms, the welding process can be semi-automated or fully automated, reducing the labor intensity of operators and improving welding efficiency and stability.

[0037] In summary, the large-diameter water supply pipe hot-melt welding device of the present invention can effectively solve the problems of low welding efficiency, poor butt joint accuracy and difficulty in guaranteeing welding quality in the prior art, and provides an efficient, accurate and stable technical solution for the welding of large-diameter water supply pipes. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural diagram of the assembly base; Figure 3 This is a schematic diagram of the structure of a hot melt assembly; Figure 4 A structural diagram of the combination of positioning fixture, pressurizing assembly, symmetrical adjustment assembly, and adjustment assemblies No. 1 and No. 2; Figure 5 This is a schematic diagram of the internal structure of the positioning fixture; Figure 6 A structural diagram showing the assembly of various components of the positioning fixture; Figure 7 A schematic diagram of the internal structure of the pressurization component; Figure 8 This is a structural diagram of the assembly ring and the components mounted on it.

[0039] In the diagram: 1. Assembly base; 11. Casters; 12. Sliding guide groove; 13. Assembly bracket; 131. Support guide wheel; 14. Lifting guide groove; 2. Positioning fixture; 21. Sliding base; 221. Lifting bracket; 222. Adjusting screw B; 2221. Synchronous pulley No. 1; 223. Bevel gear A; 224. Bevel gear B; 231. Adjusting screw C; 232. Splined shaft C; 233. Bevel gear C; 234. Bevel gear D; 235. Bevel gear E; 236. Bevel gear F; 24. Chuck; 3. Pressurizing assembly; 31. Lifting base; 311. Guide groove; 321. Drive motor D; 322. Adjusting screw E; 331. Sliding support; 3311. Assembly port. 3312 Assembly slot, 332 Drive motor E, 3321 Bevel gear J, 333 Retracting bracket, 334 Pressure wheel, 335 Compression spring, 336 Assembly ring, 3361 Gear tooth, 3362 Positioning pin seat, 3363 Positioning pin hole, 341 Adjusting screw D, 342 Second synchronous pulley, 343 Bevel gear G, 344 Bevel gear H, 4 Hot melt assembly, 41 Assembly column, 42 Drive motor F, 43 Adjusting screw F, 44 Lifting assembly seat, 45 Hot melt welding head, 51 Drive motor A, 52 Adjusting screw A, 61 Drive motor B, 62 Splined shaft A, 71 Drive motor C, 72 Splined shaft B, 8 Water supply pipe body. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figure 1-8 The technical solutions of each component provided in this application and the operating principle of the cooperation between each component will be described in detail in conjunction with the following embodiments. Example

[0042] A large-diameter water supply pipe hot-melt welding device includes an assembly base 1, a positioning fixture 2, a pressurizing component 3, and a hot-melt component 4 for heating the port of the water supply pipe body 8 mounted on the assembly base 1. The positioning fixture 2 includes two sets that are slidably mounted on the assembly base 1 and maintain symmetry. The pressurizing component 3 is coaxially arranged at the center of the two sets of positioning fixtures 2. The hot-melt component 4 is arranged outside the travel path of one set of positioning fixtures 2.

[0043] The positioning fixture 2 includes a sliding base 21, a longitudinal positioning component, a transverse positioning component, and two sets of clamps 24 mounted on the sliding base 21 and arranged symmetrically. The sliding base 21 is slidably mounted on the mounting base 1. The transverse positioning component and the longitudinal positioning component are both mounted in the sliding base 21 and are poweredly connected to the clamps 24. The transverse positioning component is used to adjust the distance between the two sets of clamps 24, and the longitudinal positioning component is used to adjust the height of the clamps 24.

[0044] The pressurization assembly 3 includes a lifting base 31, an opening and closing adjustment assembly, and two sets of pressurization units mounted on the lifting base 31 and symmetrically distributed. The lifting base 31 is slidably installed in the mounting base 1 and moves up and down in the vertical direction. The opening and closing adjustment assembly is poweredly connected to the two sets of pressurization units.

[0045] The assembly base 1 ensures that the positioning clamp 2, the pressurizing component 3, and the hot-melt component 4 are stably installed on it and can work together. It ensures that the two water supply pipe sections 8 used for hot-melt welding are effectively clamped on the two sets of positioning clamps 2 and coaxially positioned. It ensures that the hot-melt component 4 heats the docking port of one of the water supply pipe sections 8 to a hot-melt state. Then, the two sets of positioning clamps 2 drive the clamped water supply pipe sections 8 to move closer to each other for docking. After that, the pressurizing component 3 applies uniform pressure to the docking position of the water supply pipe sections 8. During the natural cooling and shaping process, the two water supply pipe sections 8 are welded into a unified whole.

[0046] To facilitate the transfer of the hot melt welding device and ensure the stability of the device during operation, a caster wheel 11 with a brake wheel is installed at the corner of the bottom of the mounting base 1. When the brake wheel is released, it is convenient to control the overall movement of the device. When the device is running to perform hot melt welding on the water supply pipe 8, the brake wheel is lowered to lock the caster wheel 11, ensuring the stability of the device operation.

[0047] For the positioning clamp 2, the top surface of the sliding base 21 and the inner side of the clamp 24 are provided with arc-shaped clamping surfaces for stabilizing the outer wall of the water supply pipe 8. The lateral positioning component can control the lateral movement of the two sets of clamps 24 and adjust the opening range to clamp the large-diameter water supply pipe 8. The longitudinal positioning component can control the synchronous lifting and lowering of the two sets of clamps 24 and the arc-shaped clamping surfaces on them. With the coordinated adjustment of the lateral positioning component and the longitudinal positioning component, it can be ensured that the two sets of clamps 24 and the three sets of arc-shaped clamping surfaces on the sliding base 21 are tightly fitted with the outer wall of the water supply pipe 8 of a specific diameter, ensuring the stability of clamping the water supply pipe 8.

[0048] In the pressurizing assembly 3, the lifting base 31 can drive the pressurizing unit on it to rise and fall synchronously, so that the axis of the pressurizing unit is aligned with the axis of the specific water supply pipe 8 to be welded, ensuring that the pressurizing unit can apply pressure evenly to the outer wall of the welded part.

[0049] The two pressurizing units can be adjusted in opening and closing position under the control of the opening and closing adjustment component. When the two pressurizing units are in the open position, it is convenient for the staff to assist in the insertion and assembly of the two water supply pipes 8, and at the same time, it is convenient to remove the welded and shaped water supply pipes 8 from the open position. When the two pressurizing units are in the closed position, their axes are aligned with the axis of the water supply pipes 8. Example

[0050] To ensure that the sliding bases 21 of the two sets of positioning fixtures 2 can slide on the assembly base 1 in a stable posture, so as to adjust the travel posture of their respective fixed water supply pipes 8 along the same axis, the following technical solution is provided.

[0051] The assembly base 1 has two sets of sliding guide grooves 12 arranged in the same straight line direction, and the two sets of sliding bases 21 are respectively slidably installed in the two sets of sliding guide grooves 12. It also includes a symmetrical adjustment assembly that is poweredly connected to the sliding base 21. The symmetrical adjustment assembly includes a drive motor A51 and an adjusting screw A52. The adjusting screw A52 is rotatably mounted in the sliding guide groove 12 and is poweredly connected to the drive motor A51 assembled inside the mounting base 1. The adjusting screw A52 is provided with two threaded grooves arranged in two sets of sliding guide grooves 12 with opposite thread directions. The sliding base 21 is screwed into the two threaded grooves on the adjusting screw A52.

[0052] The sliding guide groove 12 ensures that the two sets of sliding bases 21 slide stably on it. When the drive motor A51 drives the adjusting screw A52 to operate, the adjusting screw A52 has two threaded grooves arranged in opposite directions in the two sets of sliding guide grooves 12. The two sets of sliding bases 21 are screwed into the two threaded grooves on the adjusting screw A52, which can drive the two sets of sliding bases 21 to maintain symmetrical movement in the corresponding sliding guide grooves 12. This allows for symmetrical adjustment of the port position of the water supply pipe 8 clamped above the sliding base 21, so as to realize the docking operation of the ports of the two sets of water supply pipes 8. It also facilitates the movement of one set of water supply pipes 8 in conjunction with the hot melt assembly 4 to realize the heating operation of the port.

[0053] When the symmetrical adjustment component drives the two sets of positioning clamps 2 and the water supply pipe 8 held therein to run along the sliding guide groove 12, the following technical solution is provided to ensure that the water supply pipe 8 can move stably on the assembly base 1.

[0054] Both ends of the assembly base 1 are fixedly connected to the assembly bracket 13 arranged on the outside of the sliding guide groove 12. The support guide wheel 131 is rotatably mounted on the assembly bracket 13. The support guide wheel 131 and the sliding base 21 are set to the same horizontal height.

[0055] The mounting bracket 13 ensures that the support guide wheel 131 is stably installed on it. The outer wall of the support guide wheel 131 is also provided with an arc-shaped groove that is the same as the arc-shaped clamping surface on the sliding base 21, and the two are at the same horizontal height. This ensures that the water supply pipe 8 can be stably supported by the sliding base 21 and the support guide wheel 131 and arranged in a horizontal state. When the position of the water supply pipe 8 is adjusted by the symmetrical adjustment component, the water supply pipe 8 on the mounting base 1 always maintains a horizontal and straight posture, ensuring the stability of the hot melt welding operation of the water supply pipe 8. Example

[0056] To ensure that the lateral positioning component and the longitudinal positioning component can be stably installed in the sliding base 21 and to achieve their coordinated movement to adjust the horizontal and vertical positions of the two sets of clamps 24, the following technical solution is provided.

[0057] The longitudinal positioning assembly includes a lifting bracket 221 and an adjusting screw B222. The lifting bracket 221 is slidably installed in the inner cavity of the sliding base 21 and moves up and down in the vertical direction. The adjusting screw B222 includes two sets that are rotatably installed in the inner cavity of the sliding base 21 and arranged in the vertical direction. Each adjusting screw B222 has a first synchronous pulley fixedly connected to it. The two sets of first synchronous pulleys are connected by a synchronous belt. The lifting bracket 221 and the adjusting screw B222 are kept in a swivel connection. Both sets of clamps 24 are slidably installed in the lifting bracket 221 and slide in the horizontal direction.

[0058] The lateral positioning assembly includes an adjusting screw C231 that is rotatably mounted on the lifting bracket 221 and arranged in the horizontal direction. The adjusting screw C231 is provided with threaded grooves arranged in opposite directions and respectively engaged with two sets of clamps 24.

[0059] When one set of adjusting screws B222 is driven to operate, the other set of adjusting screws B222 can be driven to operate synchronously through the first synchronous pulley and the matching synchronous belt, thereby driving the lifting bracket 221 to rise and fall stably in the vertical direction, so as to synchronously raise and lower the chuck 24 assembled in the lifting bracket 221.

[0060] When the adjusting screw C231 is driven to operate, the threaded grooves arranged oppositely at both ends of the adjusting screw C231 are screwed into the two sets of chucks 24 respectively, which can drive the two sets of chucks 24 to always maintain symmetrical movement, so as to adjust the opening distance of the two sets of chucks 24 and thus stably clamp the water supply pipe body 8.

[0061] The purpose of both the longitudinal positioning component and the transverse positioning component is to adjust the specific position of the arc-shaped clamping surface on the two sets of clamps 24 so as to effectively clamp and position the water supply pipes 8 of different diameters.

[0062] To ensure the synchronous adjustment of the longitudinal and transverse positioning components in the two sets of positioning clamps 2, and to ensure that the two connected water supply pipes 8 always remain coaxially distributed, while simplifying the adjustment operation of the longitudinal and transverse positioning components, the following technical solution is provided.

[0063] It also includes a first adjustment component and a second adjustment component, which are mounted in the assembly base 1 and linked to the longitudinal positioning component and the transverse positioning component, respectively. The first adjustment component includes a drive motor B61 and a spline shaft A62 that are fixedly connected. The second adjustment component includes a drive motor C71 and a spline shaft B72 that are fixedly connected. Both the spline shaft A62 and the spline shaft B72 are rotatably mounted in the assembly base 1 and are arranged through the sliding guide groove 12. The longitudinal positioning assembly also includes bevel gear A223 and bevel gear B224. Bevel gear A223 is rotatably mounted in the sliding base 21 and is slidably inserted into the spline shaft A62. Bevel gear B224 is fixedly connected to one of the adjusting screws B222 and is meshed with bevel gear A223. The lateral positioning assembly also includes a splined shaft C232, a bevel gear C233, a bevel gear D234, a bevel gear E235, and a bevel gear F236. The splined shaft C232 is rotatably mounted in the inner cavity of the sliding base 21 and arranged vertically. The bevel gear C233 is rotatably mounted on the lifting bracket 221 and is slidably inserted into the splined shaft C232. The bevel gear D234 is fixedly connected to the adjusting screw C231 and is engaged with the bevel gear C233. The bevel gear E235 is rotatably mounted in the sliding base 21 and is slidably inserted into the splined shaft B72. The bevel gear F236 is fixedly mounted on the splined shaft C232 and is engaged with the bevel gear E235.

[0064] During the operation of the sliding base 21 along the sliding guide groove 12, the bevel gear A223 of the longitudinal positioning component and C in the transverse positioning component are always able to receive the power transmitted by the spline shaft A62 and the spline shaft B72.

[0065] When the drive motor B61 drives the spline shaft A62 to rotate, the power can be transmitted to the bevel gear A223 through the spline shaft A62, and then to the adjusting screw B222 through the bevel gear B224, so as to drive the lifting bracket 221 to rise and fall stably.

[0066] The spline shaft C232 is designed to transmit power to the bevel gear C233 that slides onto it during the lifting motion of the lifting bracket 221. When the drive motor C71 drives the sliding shaft B to rotate, the power can be transmitted to the bevel gear E235 through the spline shaft B72, which in turn drives the bevel gear F236 and the spline shaft C232 to rotate. With the help of the spline shaft and the bevel gear C233 that is inserted on it, the bevel gear D234 and the adjusting screw C231 that is fixed to the bevel gear D234 can be driven to rotate stably, so as to drive the two sets of chucks 24 to achieve symmetrical movement.

[0067] By designing adjustment components one and two, the attitude of the chucks 24 in the two sets of positioning fixtures 2 can be controlled synchronously, ensuring the stability and accuracy of the adjustment of the chucks 24, and also simplifying the operation of adjusting the chucks 24. Example

[0068] To ensure that the lifting base 31 in the pressurizing assembly 3 can move stably up and down in the assembly base 1, and to ensure that when the first adjustment component drives the longitudinal positioning component to adjust the height of the clamp 24, the height of the lifting base 31 can be adjusted at the same time, so as to keep the axis of the water supply pipe body 8 held by the clamp 24 coincided with the axis of the pressurizing unit on the pressurizing assembly 3, the following technical solution is provided.

[0069] The mounting base 1 has a lifting guide groove 14 arranged between two sets of sliding guide grooves 12. The lifting base 31 is slidably installed in the lifting guide groove 14. The pressurizing component 3 also includes a lifting adjustment component that is assembled in the lifting guide groove 14 and is poweredly connected to the lifting base 31.

[0070] The lifting adjustment assembly includes two sets of adjusting screws D341 rotatably mounted in the lifting guide groove 14 and arranged in the vertical direction, and a second synchronous pulley 342 fixed on the adjusting screws D341. The adjusting screws D341 are rotatably connected to the lifting base 31, and the two sets of second synchronous pulleys 342 are powered by a synchronous belt.

[0071] The lifting adjustment assembly also includes bevel gears G343 and H344 that are engaged. Splined shaft A62 passes through lifting guide groove 14. Bevel gear G343 is fixed to splined shaft A62, and bevel gear H344 is fixed to one of the adjusting screws D341.

[0072] The lifting guide groove 14 ensures that the lifting base 31 in the pressurizing assembly 3 is stably installed within it. When the drive motor B61 drives the splined shaft A62 to drive the longitudinal positioning component in the positioning fixture 2, power is simultaneously transmitted through the bevel gear G343 to the adjusting screw D341 equipped with the bevel gear H344. This, in turn, drives another set of adjusting screws to operate synchronously through the combination of the second synchronous pulley 342 and the matching synchronous belt, thereby driving the lifting base 31 to move stably up and down in the lifting guide groove 14. This enables the lifting base 31 and the clamp 24 to move together, ensuring that the welded water supply pipe 8 and the pressurizing assembly 3 are always arranged coaxially. Example

[0073] To ensure that the two sets of pressurizing units can be stably installed in the lifting base 31 in a horizontal sliding posture, and to ensure that the opening and closing adjustment component is installed in the lifting base 31 and drives the two sets of pressurizing units to maintain symmetrical movement, the following technical solution is provided.

[0074] The lifting base 31 is provided with a guide groove 311. The pressurizing unit includes a sliding support 331 that is slidably installed in the guide groove 311. The opening and closing adjustment assembly includes a drive motor D321 that maintains a power connection and an adjusting screw E322. The adjusting screw E322 is rotatably installed in the guide groove 311. The adjusting screw E322 is provided with two threaded grooves with opposite spiral directions that are respectively screwed into two sets of sliding supports 331.

[0075] The guide groove 311 ensures that the sliding support 331 and adjusting screw E322 of the pressurizing unit are stably assembled therein. When the drive motor D321 drives the adjusting screw to run, the two oppositely arranged threaded grooves on it are screwed to the two sets of sliding supports 331 respectively, which can drive the two sets of sliding supports 331 to always maintain symmetrical movement.

[0076] To ensure that the two pressurizing units can uniformly pressurize the connected tube body when in a closed state, the following technical solution is provided.

[0077] The sliding support 331 has a semi-circular assembly opening 3311 and a semi-circular assembly groove 3312 on the inner wall of the opening. The pressurizing unit also includes a drive motor E332, a take-up bracket 333, a pressure wheel 334, a compression spring 335, and a semi-circular assembly ring 336. The assembly ring 336 is rotatably installed in the assembly groove 3312 and its outer wall is evenly provided with gear teeth 3361. The take-up bracket 333 is rotatably installed on the inner wall of the assembly ring 336. The pressure wheel 334 is rotatably installed at the end of the take-up bracket 333. The two ends of the compression spring 335 are respectively hinged to the inner wall of the assembly ring 336 and the take-up bracket 333. The drive motor E332 is fixedly installed in the sliding support 331, and a bevel gear J3321 that meshes with the gear teeth 3361 is fixedly connected to the output shaft of the drive motor E332.

[0078] When the two sets of sliding supports 331 move relative to each other and dock, the two sets of assembly rings 336 on them are matched to form a complete ring structure. The outer gear teeth 3361 are also fully assembled. To ensure the fit stability and accuracy of the two sets of assembly rings 336, positioning pin seats 3362 and positioning pin holes 3363 are respectively provided at the ends of the assembly rings 336.

[0079] The retractable bracket 333, pressure roller 334, and compression spring 335 in the two pressurizing units are all centrally symmetrically distributed. During the closing process of the pressurizing unit, the connection part of the water supply pipe body 8 can drive the pressure roller 334 to move outward, and then the compression spring 335 will extend and store elastic potential energy. This part of elastic potential energy can ensure that the pressure roller 334 maintains a stable pressure on the connection part of the water supply pipe for a long time.

[0080] During the process of the two sets of drive motors E332 driving the two sets of bevel gears J3321 to rotate in opposite directions at the same speed, the two sets of assembly rings 336 that are combined into a complete circular ring and the pressure rollers 334 mounted on them can be driven to rotate stably, so as to apply stable pressure to the outer wall of the water supply pipe body 8 and ensure that the two sets of water supply pipe bodies 8 are stably fitted and sealed.

[0081] The drive motor E332 is a conical rotor motor with a self-locking shaft. When the pressurizing unit is stopped, the assembly ring 336 must be flush with the port of the assembly port 3311 of the sliding support 331. When the two pressurizing units are separated, the shaft of the drive motor E332 is locked, thus ensuring that the two sets of assembly rings 336 are also locked. Example

[0082] To ensure that the hot melt assembly 4 can be stably installed on the assembly base 1 and work in conjunction with the corresponding side positioning clamp 2 to heat and soften the port of the clamped water supply pipe 8, the following technical solution is provided.

[0083] The hot melt assembly 4 includes an assembly column 41, a drive motor F42, an adjusting screw F43, a lifting assembly seat 44, and a hot melt welding head 45. The assembly column 41 is fixedly installed on the assembly base 1. The lifting assembly seat 44 is slidably installed in the assembly column 41 and moves up and down in the vertical direction. The adjusting screw is rotatably installed in the assembly column 41 and is screwed into the lifting assembly seat 44. The drive motor F42 is fixedly installed on the assembly base 1 and is powered by the adjusting screw F43. The hot melt welding head 45 is detachably assembled on the lifting assembly seat 44.

[0084] The hot melt welding head 45 can be quickly disassembled and replaced according to the inner diameter of the water supply pipe body 8 being welded. Moreover, the axes of the hot melt welding head 45 and the water supply pipe body 8 are arranged in the same vertical plane, ensuring that the hot melt welding head 45 can perform alignment and hot melt welding on the port of the water supply pipe body 8.

[0085] The drive motor F42 drives the adjusting screw F43 to drive the lifting assembly seat 44 and the hot melt welding head 45 on it to adjust the height. The symmetrical adjustment component drives the positioning clamp 2 holding the water supply pipe body 8 to move horizontally, so that the hot melt welding head 45 can be accurately connected to the port of the water supply pipe body 8.

[0086] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0087] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hot melt welding apparatus for large diameter water supply pipes, characterized by: The assembly includes an assembly base (1), a positioning fixture (2) mounted on the assembly base (1), a pressurizing component (3), and a heat-melting component (4) for heating the port of the water supply pipe (8). The positioning fixture (2) includes two sets that are slidably mounted on the assembly base (1) and maintain symmetry. The pressurizing component (3) is coaxially arranged at the center of the two sets of positioning fixtures (2). The heat-melting component (4) is arranged outside the travel path of one set of positioning fixtures (2). The positioning fixture (2) includes a sliding base (21), a longitudinal positioning component, a transverse positioning component, and two sets of clamps (24) mounted on the sliding base (21) and arranged symmetrically. The sliding base (21) is slidably mounted on the mounting base (1). The transverse positioning component and the longitudinal positioning component are both mounted in the sliding base (21) and are connected to the clamps (24) by a power connection. The transverse positioning component is used to adjust the distance between the two sets of clamps (24), and the longitudinal positioning component is used to adjust the height of the clamps (24). The pressurizing component (3) includes a lifting base (31), an opening and closing adjustment component, and two sets of pressurizing units mounted on the lifting base (31) and symmetrically distributed. The lifting base (31) is slidably installed in the mounting base (1) and moves up and down in the vertical direction. The opening and closing adjustment component is poweredly connected to the two sets of pressurizing units. The lifting base (31) is provided with a guide groove (311), the pressurizing unit includes a sliding support (331) slidably installed in the guide groove (311), and the opening and closing adjustment assembly includes a drive motor D (321) and an adjusting screw E (322) that maintains a power connection. The adjusting screw E (322) is rotatably installed in the guide groove (311), and the adjusting screw E (322) is provided with two threaded grooves arranged in opposite directions and respectively connected to the two sets of sliding supports (331). The sliding support (331) has a semi-circular assembly opening (3311) and a semi-circular assembly groove (3312) on the inner wall of the opening. The pressurizing unit also includes a drive motor E (332), a take-up and release bracket (333), a pressure wheel (334), a compression spring (335), and a semi-circular assembly ring (336). The assembly ring (336) is rotatably mounted in the assembly groove (3312) and its outer wall is evenly provided with gear teeth (3361). The take-up and release... The bracket (333) is rotatably mounted on the inner wall of the assembly ring (336), the pressure wheel (334) is rotatably mounted on the end of the take-up bracket (333), the two ends of the compression spring (335) are respectively hinged to the inner wall of the assembly ring (336) and the take-up bracket (333), the drive motor E (332) is fixedly mounted in the sliding support (331), and a bevel gear J (3321) that meshes with the gear teeth (3361) is fixedly connected to the output shaft of the drive motor E (332).

2. A hot melt welding apparatus for large diameter water service pipes as claimed in claim 1 wherein: The assembly base (1) is provided with two sets of sliding guide grooves (12) arranged in the same straight direction, and the two sets of sliding bases (21) are respectively slidably installed in the two sets of sliding guide grooves (12); It also includes a symmetrical adjustment assembly that is poweredly connected to the sliding base (21). The symmetrical adjustment assembly includes a drive motor A (51) and an adjusting screw A (52). The adjusting screw A (52) is rotatably installed in the sliding guide groove (12) and is poweredly connected to the drive motor A (51) assembled inside the mounting base (1). The adjusting screw A (52) is provided with two threaded grooves arranged in two sets of sliding guide grooves (12) with opposite thread directions. The sliding base (21) is screwed into the two threaded grooves on the adjusting screw A (52).

3. A hot melt welding apparatus for large diameter water service pipes as defined in claim 2 wherein: Both ends of the assembly base (1) are fixedly connected to an assembly bracket (13) arranged outside the sliding guide groove (12). A support guide wheel (131) is rotatably installed on the assembly bracket (13). The support guide wheel (131) and the sliding base (21) are set to the same horizontal height.

4. A hot melt welding apparatus for large diameter water service pipes as defined in claim 2 wherein: The longitudinal positioning assembly includes a lifting bracket (221) and an adjusting screw B (222). The lifting bracket (221) is slidably installed in the inner cavity of the sliding base (21) and moves up and down in the vertical direction. The adjusting screw B (222) includes two sets rotatably installed in the inner cavity of the sliding base (21) and arranged in the vertical direction. Each adjusting screw B (222) has a first synchronous pulley fixedly connected to it. The two sets of first synchronous pulleys are connected by a synchronous belt. The lifting bracket (221) and the adjusting screw B (222) are kept in a swivel connection. Both sets of clamps (24) are slidably installed in the lifting bracket (221) and slide in the horizontal direction. The lateral positioning assembly includes an adjusting screw C (231) rotatably mounted on the lifting bracket (221) and arranged in the horizontal direction. The adjusting screw C (231) is provided with threaded grooves arranged in opposite directions and respectively connected to two sets of clamps (24).

5. A hot melt welding apparatus for large diameter water service pipes as defined in claim 4 wherein: It also includes a first adjustment component and a second adjustment component, which are mounted in the mounting base (1) and are respectively linked with the longitudinal positioning component and the transverse positioning component. The first adjustment component includes a drive motor B (61) and a spline shaft A (62) that are fixedly connected. The second adjustment component includes a drive motor C (71) and a spline shaft B (72) that are fixedly connected. The spline shaft A (62) and the spline shaft B (72) are rotatably mounted in the mounting base (1) and are arranged through the sliding guide groove (12). The longitudinal positioning assembly also includes bevel gear A (223) and bevel gear B (224). Bevel gear A (223) is rotatably mounted in the sliding base (21) and is slidably inserted into the spline shaft A (62). Bevel gear B (224) is fixedly connected to one of the adjusting screws B (222) and is engaged with bevel gear A (223). The transverse positioning assembly also includes a splined shaft C (232), a bevel gear C (233), a bevel gear D (234), a bevel gear E (235), and a bevel gear F (236). The splined shaft C (232) is rotatably mounted in the inner cavity of the sliding base (21) and arranged in the vertical direction. The bevel gear C (233) is rotatably mounted on the lifting bracket (221) and is slidably inserted into the splined shaft C (232). The bevel gear D (234) is fixedly connected to the adjusting screw C (231) and is engaged with the bevel gear C (233). The bevel gear E (235) is rotatably mounted in the sliding base (21) and is slidably inserted into the splined shaft B (72). The bevel gear F (236) is fixedly mounted on the splined shaft C (232) and is engaged with the bevel gear E (235).

6. A hot melt welding apparatus for large diameter water service pipes as defined in claim 5 wherein: The mounting base (1) is provided with a lifting guide groove (14) arranged between two sets of sliding guide grooves (12), the lifting base (31) is slidably installed in the lifting guide groove (14), and the pressurizing component (3) further includes a lifting adjustment component assembled in the lifting guide groove (14) and kept in a power connection with the lifting base (31); The lifting adjustment assembly includes two sets of adjusting screws D (341) rotatably mounted in the lifting guide groove (14) and arranged in the vertical direction, and a second synchronous pulley (342) fixed on the adjusting screws D (341). The adjusting screws D (341) are rotatably connected to the lifting base (31), and the two sets of second synchronous pulleys (342) are connected by a synchronous belt. The lifting adjustment assembly also includes bevel gears G (343) and H (344) that are engaged. The spline shaft A (62) is arranged through the lifting guide groove (14). The bevel gear G (343) is fixed to the spline shaft A (62). The bevel gear H (344) is fixed to one of the adjusting screws D (341).

7. A hot melt welding apparatus for large diameter water service pipes as defined in claim 1 wherein: The hot melt assembly (4) includes an assembly column (41), a drive motor F (42), an adjusting screw F (43), a lifting assembly seat (44), and a hot melt welding head (45). The assembly column (41) is fixedly installed on the assembly base (1). The lifting assembly seat (44) is slidably installed in the assembly column (41) and moves up and down in the vertical direction. The adjusting screw is rotatably installed in the assembly column (41) and is screwed to the lifting assembly seat (44). The drive motor F (42) is fixedly installed on the assembly base (1) and is poweredly connected to the adjusting screw F (43). The hot melt welding head (45) is detachably assembled on the lifting assembly seat (44).

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