A welding positioning device and method for processing a spraying pipe of a watering cart

Abstract

The application discloses a welding positioning device and method for processing a spraying pipe of a watering cart, and relates to the technical field of welding equipment. The welding positioning device and method for processing the spraying pipe of the watering cart comprises a welding table and a positioning tool for placing the spraying pipe of the watering cart which is detachably installed on the welding table. The positioning tool comprises a pair of support stands which are installed on a welding vertical plate of the welding table, and a connecting seat assembly is installed on the top of each corner of the support stand. The spraying pipe of the watering cart is supported by installing the positioning tool on the welding table. The positioning tool has two modes of positioning ways for different welding modes of the spraying pipe of the watering cart, and a pressing assembly is further installed on both ends of the positioning tool to press the spraying pipe of the watering cart, so that the welding seams are close to each other, and the welding quality is effectively improved. Moreover, the plurality of components are modularly installed and combined, the length of the spraying pipe of the watering cart can be adjusted, the support strength is ensured, and the assembly and storage are facilitated, and the operation is simple and convenient.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding positioning device and method for processing spray pipes for sprinkler trucks. Background Technology

[0002] The spray pipe of a water truck is the core component for achieving efficient dust suppression, greening spraying, and emergency cooling. It is usually made of high-strength corrosion-resistant materials (such as stainless steel or engineering plastics). A high-pressure water pump delivers water from the water tank to the pipe body, which is then transformed into a fine water mist through the built-in spiral atomizing nozzle or fan-shaped nozzle. It is widely used in urban road cleaning, construction site dust control, garden irrigation, and road surface cooling in hot weather. It has advantages such as water and energy saving, uniform coverage, and convenient operation.

[0003] Sprinkler truck spray pipes are large metal cylinders, and welding them typically requires large automated welding equipment. For example, CN109396735B discloses a welding positioning fixture for sprinkler truck spray pipes, which addresses the problem of poor welding position accuracy when welding connecting plates and water inlet connectors to the spray pipe in existing technologies. The fixture includes a base with a support seat for supporting and positioning the spray pipe. The support seat has a nozzle seat positioning structure, which includes an axial positioning structure for positioning and engaging with a nozzle seat on the spray pipe to limit axial movement of the spray pipe, and a circumferential positioning structure for limiting rotation of the spray pipe. The base also has a connecting plate positioning structure, which includes an axial positioning structure for limiting axial movement of the connecting plate along the spray pipe, and an anti-rotation positioning structure for limiting rotation of the connecting plate around the spray pipe. The relative position between the connecting plate and the spray pipe is positioned by the fixture before welding, ensuring good welding position accuracy.

[0004] The welding positioning fixture described above restricts both the axial movement and rotation of the spray pipe. This is only suitable for positioning when performing axial straight welding on the surface of the spray pipe. However, since the spray pipe of a sprinkler truck is large, it may be divided into multiple sections for welding. In this case, rotational welding is required, which generally requires a separate fixture for support and rotation. The switching process is cumbersome and affects work efficiency. There is a lack of a positioning fixture that can handle both welding modes simultaneously and switch between them easily and quickly. Furthermore, when performing axial straight welding on the spray pipe, since it is formed by bending a metal plate, the area to be welded may separate into large or uneven gaps due to tension. Direct welding would affect the welding quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a welding positioning device and method for processing sprinkler truck spray pipes, solving the problems still existing in the welding positioning tooling for sprinkler truck spray pipes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding positioning device for processing sprinkler truck spray pipes, comprising a welding table and a positioning fixture detachably mounted on it for placing the sprinkler truck spray pipe, wherein the positioning fixture includes:

[0007] A pair of support frames are provided and installed on the welding plate of the welding table, and a connecting seat assembly is installed at each of the two top corners of the support frame;

[0008] A pair of support shaft assemblies are provided, and both ends of the support shaft assembly are clamped in the connecting seat assembly. By switching the mode of the connecting seat assembly and cooperating with the support shaft assembly, the support shaft assembly can achieve two modes: rotation and fixation. The rotation mode of the support shaft assembly is used for circumferential welding of the sprinkler truck spray pipe, and the fixation mode of the support shaft assembly is used for axial welding of the sprinkler truck spray pipe.

[0009] The clamping assembly, mounted on the support shaft assembly, is used to clamp the spray pipe of the sprinkler truck to bring the axial weld seam closer together;

[0010] The connecting seat assembly includes a support seat, the top of which has a semi-circular arc surface to support the support shaft assembly. A double-sided pressing structure is rotatably connected to one side of the support seat, and the movable end of the double-sided pressing structure is locked to the other side of the support seat by a locking pin. One side of the double-sided pressing structure is a smooth semi-circular arc surface, and the other side is a toothed semi-circular arc surface. The support shaft assembly is provided with teeth that are adapted to the toothed semi-circular arc surface.

[0011] Preferably, the double-sided pressing structure includes a hyperboloid pressing block, with a smooth semi-circular arc surface and a toothed semi-circular arc surface formed on both sides of the hyperboloid pressing block. One end of the hyperboloid pressing block is rotatably connected to a ball head seat on one side of the support base via a ball head. The other end of the hyperboloid pressing block is rotatably connected to a carrying handle. The locking pin is rotatably sleeved on the movable end of the carrying handle. A locking groove adapted to the locking pin is formed on the other side of the support base.

[0012] Preferably, the support shaft assembly includes a support tube, and multiple support wheels are symmetrically fixedly sleeved on the surfaces of the left and right sections of the support tube, and all support wheels except the two in the center are installed on the support tube through connecting tube sleeves.

[0013] Preferably, the connecting sleeve includes a connecting section connected to the connecting seat assembly. The connecting section is fixedly connected to the support tube by bolts. A central tube is fixedly connected to one side of the connecting section for mounting the support wheel. Annular grooves are formed at both ends of the surface of the connecting section. A ball bearing adapted to the annular groove is rotatably connected to the inner surface of the semi-circular arc surface. A smooth arc-shaped bracket for supporting the support wheel is also fixedly connected to one side of the support seat. A convex tooth adapted to the toothed semi-circular arc surface is formed in the middle of the surface of the connecting section.

[0014] Preferably, the upper half of the connecting sleeve of the support tube is integrally machined with a pulley groove at the end away from the central tube. A low-speed motor is installed on one side of the support frame, and a pulley is installed at the output end of the low-speed motor. The pulley and the two pulley grooves on the same plane on the two support shaft assemblies are connected by belt drive. A tensioning wheel mechanism for tensioning the belt is also installed on the support frame.

[0015] Preferably, the tensioning wheel mechanism includes a bent rod that slides through the top of the support frame, one end of the bent rod is rotatably fitted with a pressure wheel for pressing down the belt, the bottom end of the bent rod is threaded with a nut, and a spring is fitted on the surface of the bent rod between the top of the nut and the support frame.

[0016] Preferably, the support frame includes an upper horizontal plate and a lower horizontal plate. The two ends of the upper and lower horizontal plates are fixedly connected by columns. Fixed clamping plates are fixedly connected to the bottom of both ends of the lower horizontal plate. A movable clamping plate is sleeved in the middle of the lower horizontal plate. Slots adapted to the welding plate are opened in both the fixed and movable clamping plates. A fastening structure is provided at the connection between the lower horizontal plate and the movable clamping plate. The movable clamping plate moves on the lower horizontal plate in a direction perpendicular to the welding plate under the thrust of the fastening structure to cooperate with the fixed clamping plate to clamp the welding plate. A transverse groove adapted to the lower horizontal plate is opened on the movable clamping plate. Supporting ribs are fixedly connected to both sides of the lower horizontal plate at the bottom of the movable and fixed clamping plates. The support ribs on both sides of the fixed clamping plate are fixedly connected to the fixed clamping plate, and the support ribs on both sides of the movable clamping plate are slidably connected to the movable clamping plate.

[0017] Preferably, the fastening structure includes a threaded post fixedly connected to the top of the lower horizontal plate and a lower wedge-shaped seat fixedly connected to the side of the movable plate, and the upper wedge-shaped seat and the threaded seat are fastened together by fastening bolts. The bottom of the upper wedge-shaped seat is provided with an inclined surface that matches the lower wedge-shaped seat.

[0018] Preferably, two sets of clamping assemblies are symmetrically arranged. Each clamping assembly includes two inverted U-shaped sleeves that are fastened to the support shaft assembly. The two inverted U-shaped sleeves are fixedly connected by a connecting rod. A clamping rod is rotatably connected to the top of each inverted U-shaped sleeve. A positioning seat is rotatably connected to the middle of one side of the clamping rod via a horizontal shaft, and a lead screw is rotatably connected inside the positioning seat. A threaded seat is rotatably connected to the middle of one side of the clamping rod via a horizontal shaft. The threaded seat is threaded onto the outside of the lead screw, and a crank is fixedly connected to the end of the lead screw away from the positioning seat. The fixed top end of the clamping rod is bent to the other side to form a clamping section, and the clamping section has a curved arc structure that bends away from the spray pipe of the sprinkler truck.

[0019] This invention also discloses a method for using a welding positioning device for processing spray pipes for sprinkler trucks, comprising the following steps:

[0020] S1. First, based on the length of the water truck spray pipe to be welded, place the two support brackets at a suitable distance on the welding table, place the support shaft assembly on the two support brackets, further fine-tune the distance between the support brackets, and then fix the support brackets tightly. After that, depending on the method of welding the water truck spray pipe, select and adjust the connecting seat assembly to rotate and press the support shaft assembly into a locking manner.

[0021] S2. Use a crane or forklift with a lifting rope to lift the water truck spray pipe and place it on the support shaft assembly. If you want to perform axial welding on the water truck spray pipe, adjust the weld seam to be welded to face upwards, and further install clamping components on the support shaft assembly at both ends of the water truck spray pipe. Manually tighten the clamping components to squeeze the water truck spray pipe and make the weld seam to be welded close.

[0022] S3. Start the welding device and weld the spray pipe of the sprinkler truck according to the set program.

[0023] This invention provides a welding positioning device and method for processing spray pipes for sprinkler trucks. Compared with the prior art, it has the following advantages:

[0024] 1. The welding positioning device and method for processing sprinkler truck spray pipes utilizes a positioning fixture installed on a welding table to support the sprinkler truck spray pipes. This fixture offers two positioning modes to accommodate different welding methods. For circumferential welding of the sprinkler truck spray pipes, the support shaft assembly is rotatably mounted and driven by a low-speed motor, allowing the spray pipes to rotate at a uniform speed for splicing and welding multiple sections. For axial welding, the support shaft assembly can be locked to restrict rotation and prevent welding misalignment. Furthermore, clamping components can be installed at both ends to press the spray pipes together, bringing the weld seams closer and effectively improving welding quality. The modular assembly of multiple components allows for adjustment based on the spray pipe length, ensuring support strength while facilitating assembly and storage. Operation is simple and convenient.

[0025] 2. The welding positioning device and method for processing the spray pipe of the sprinkler truck uses a clamp plate at the bottom of the support frame to be inserted into the welding plate. It can be used with the existing welding platform. The clamp plate is perpendicular to the lower horizontal plate, which can also provide good stability. At the same time, with the cooperation of the simple fastening structure, the support frame can be quickly locked on the welding plate to prevent it from moving at will and ensure the positioning effect.

[0026] 3. The welding positioning device and method for processing the spray pipe of the sprinkler truck can be easily installed on the front and rear support shaft assemblies through the independently set clamping components. The clamping components can also tighten the two rows of clamping components to reduce their deformation. The two complement each other, and the angle of the clamping components can be expanded and contracted to adapt to different sizes of sprinkler truck spray pipes, with strong adaptability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the positioning fixture of the present invention installed on the welding table;

[0028] Figure 2 This is a schematic diagram of the positioning tooling of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the support shaft assembly of the present invention;

[0030] Figure 4 This is a schematic diagram of a first-mode connector assembly of the present invention;

[0031] Figure 5 This is a schematic diagram of a second mode of the connector assembly of the present invention;

[0032] Figure 6 This is a schematic diagram of the connecting sleeve of the present invention;

[0033] Figure 7 This is a schematic diagram of the double-sided pressing structure of the present invention;

[0034] Figure 8 This is a schematic diagram of the tensioning wheel mechanism of the present invention;

[0035] Figure 9 This is a schematic diagram of the lower horizontal plate, fixed clamping plate, movable clamping plate and fastening structure of the present invention;

[0036] Figure 10 For the present invention Figure 9 A diagram showing the view from below;

[0037] Figure 11 This is an exploded view of the movable card plate and fastening structure of the present invention;

[0038] Figure 12 This is a schematic diagram of the clamping assembly of the present invention.

[0039] In the diagram: 1-Welding table, 2-Supporting frame, 21-Upper horizontal plate, 22-Lower horizontal plate, 23-Column, 24-Fixed clamping plate, 25-Modible clamping plate, 26-Slot, 27-Fastening structure, 271-Lower wedge seat, 272-Threaded column, 273-Upper wedge seat, 274-Fastening bolt, 28-Horizontal groove;

[0040] 3-Connecting seat assembly, 31-Support seat, 32-Semi-circular arc surface, 33-Double-sided clamping structure, 331-Locking pin, 332-Hyperbolic pressure block, 333-Ball head, 334-Toothed semi-circular arc surface, 335-Handle bending rod, 336-Smooth semi-circular arc surface, 34-Ball head seat, 35-Locking groove, 36-Ball, 37-Smooth arc bracket;

[0041] 4-Support shaft assembly, 41-Support tube, 42-Support wheel, 43-Connecting tube sleeve, 431-Connecting section, 432-Central tube, 433-Annular groove, 434-Protruding tooth, 435-Pulley groove;

[0042] 5-Clamping assembly, 51-Inverted U-shaped sleeve, 52-Connecting rod, 53-Clamping rod, 54-Positioning seat, 55-Lead screw, 56-Threaded seat, 57-Handle, 58-Clamping section;

[0043] 6-Low-speed motor, 7-Belt, 8-Tensioner mechanism, 81-Bent rod, 82-Pressure roller, 83-Nut, 84-Spring. Detailed Implementation

[0044] 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.

[0045] See Figures 1-12 This invention discloses a welding positioning device and method for processing spray pipes for sprinkler trucks, and provides the following three technical solutions:

[0046] The first embodiment includes a welding table 1 and a positioning fixture detachably mounted on it for placing the spray pipe of a sprinkler truck. The positioning fixture includes:

[0047] A pair of support frames 2 are provided and installed on the welding plate of the welding table 1, and a connecting seat assembly 3 is installed at each of the two top corners of the support frame 2;

[0048] The support shaft assembly 4 is provided in pairs, and both ends of the support shaft assembly 4 are clamped in the connecting seat assembly 3. By switching the mode of the connecting seat assembly 3 to cooperate with the support shaft assembly 4, the support shaft assembly 4 can be rotated and fixed. The rotation mode of the support shaft assembly 4 is used for circumferential welding of the sprinkler truck spray pipe, and the fixed mode of the support shaft assembly 4 is used for axial welding of the sprinkler truck spray pipe.

[0049] The clamping component 5 is mounted on the support shaft assembly 4 and is used to clamp the spray pipe of the sprinkler truck to bring the axial weld seam closer together.

[0050] The connecting seat assembly 3 includes a support seat 31. The top of the support seat 31 has a semi-circular arc surface 32 to support the support shaft assembly 4. A double-sided pressing structure 33 is rotatably connected to one side of the support seat 31, and the movable end of the double-sided pressing structure 33 is locked to the other side of the support seat 31 by a locking pin 331. One side of the double-sided pressing structure 33 is a smooth semi-circular arc surface 336, and the other side is a toothed semi-circular arc surface 334. The support shaft assembly 4 is provided with teeth that are adapted to the toothed semi-circular arc surface 334.

[0051] Furthermore, the double-sided pressing structure 33 includes a hyperboloid pressing block 332, a smooth semi-circular arc surface 336 and a toothed semi-circular arc surface 334 on both sides of the hyperboloid pressing block 332. One end of the hyperboloid pressing block 332 is rotatably connected to the ball head seat 34 on one side of the support base 31 through the ball head 333. The other end of the hyperboloid pressing block 332 is rotatably connected to a handle 335. The locking pin 331 is rotatably sleeved on the movable end of the handle 335. The other side of the support base 31 is provided with a locking groove 35 that matches the locking pin 331.

[0052] The support shaft assembly 4 includes a support tube 41. Multiple support wheels 42 are symmetrically fixedly sleeved on the surfaces of the left and right sections of the support tube 41. Except for the two central ones, all the support wheels 42 are installed on the support tube 41 through connecting sleeves 43. The center of the support wheel 42 must be kept as a multiple of the spacing between the welding plates, so as to ensure that when the support frame 2 is adjusted to connect the connecting sleeves 43 at different positions, the bottom of the support frame 2 can be accurately locked onto the welding plate.

[0053] Furthermore, the connecting sleeve 43 includes a connecting section 431 connected to the connecting seat assembly 3. The connecting section 431 is fixedly connected to the support tube 41 by bolts. A central tube 432 is fixedly connected to one side of the connecting section 431 for mounting the support wheel 42. Annular grooves 433 are formed at both ends of the surface of the connecting section 431. A ball bearing 36 adapted to the annular groove 433 is rotatably connected to the inner surface of the semi-circular arc surface 32. A smooth arc-shaped bracket 37 for supporting the support wheel 42 is also fixedly connected to one side of the support seat 31. The middle of the surface of section 431 is provided with a convex tooth 434 that is adapted to the toothed semi-circular arc surface 334. The end of the connecting sleeve 43 of the upper half of the support tube 41 away from the central tube 432 is also integrally machined with a pulley groove 435. A low-speed motor 6 is installed on one side of the support frame 2, and a pulley is installed at the output end of the low-speed motor 6. The pulley and the two pulley grooves 435 on the same plane on the two support shaft assemblies 4 are connected by a belt 7. A tensioning wheel mechanism 8 for tensioning the belt 7 is also installed on the support frame 2.

[0054] The tensioning wheel mechanism 8 includes a bent rod 81 that slides through the top of the support frame 2. One end of the bent rod 81 is rotatably fitted with a pressure wheel 82 for the pressure belt 7. The bottom end of the bent rod 81 is threadedly connected with a nut 83. A spring 84 is fitted on the surface of the bent rod 81 and between the top of the nut 83 and the support frame 2.

[0055] This application supports the spray pipe of a sprinkler truck by installing a positioning fixture on the welding table 1. The positioning fixture has two positioning modes for different welding methods of the sprinkler truck spray pipe. When the sprinkler truck spray pipe is circumferentially welded, the support shaft assembly 4 is installed in a rotatable form and driven by a low-speed motor 6, which allows the sprinkler truck spray pipe to rotate at a uniform speed, thereby splicing and welding multiple sections of the sprinkler truck spray pipe. When the sprinkler truck spray pipe is to be welded in the axial direction, the support shaft assembly 4 can be locked to restrict the rotation of the sprinkler truck spray pipe and prevent the welding from being crooked. Furthermore, clamping components 5 can be installed at both ends to clamp the sprinkler truck spray pipe, bringing the weld seam closer together and effectively improving the welding quality. Moreover, the modular installation and combination of multiple components can also be adjusted to adapt to the length of the sprinkler truck spray pipe, ensuring support strength while also facilitating assembly and storage, and making operation simple and convenient.

[0056] The second embodiment differs from the first embodiment in that: the support frame 2 includes an upper horizontal plate 21 and a lower horizontal plate 22. The tensioning wheel mechanism 8 and the connecting seat assembly 3 are both mounted on the upper horizontal plate 21. The two ends of the upper horizontal plate 21 and the lower horizontal plate 22 are fixedly connected by a column 23. Fixed clamping plates 24 are fixedly connected to the bottom of both ends of the lower horizontal plate 22. A movable clamping plate 25 is sleeved in the middle of the lower horizontal plate 22. Slots 26 adapted to the welding uprights are opened in both the fixed clamping plate 24 and the movable clamping plate 25. The spacing of the slots 26 is adapted to the spacing of the welding uprights. A fastening structure 27 is provided at the connection between plate 22 and movable clamping plate 25. Under the thrust of the fastening structure 27, movable clamping plate 25 moves on the lower horizontal plate 22 in the direction perpendicular to the welded upright plate to cooperate with fixed clamping plate 24 to clamp the welded upright plate. A transverse groove 28 adapted to the lower horizontal plate 22 is provided on movable clamping plate 25. Support ribs are fixedly connected to both sides of movable clamping plate 25 and fixed clamping plate 24 at the bottom of lower horizontal plate 22. The support ribs on both sides of fixed clamping plate 24 are fixedly connected to fixed clamping plate 24, and the support ribs on both sides of movable clamping plate 25 are slidably connected to movable clamping plate 25.

[0057] The fastening structure 27 includes a threaded post 272 fixedly connected to the top of the lower horizontal plate 22, and a lower wedge seat 271 fixedly connected to the side of the movable clamping plate 25. An upper wedge seat 273 is longitudinally sleeved on the threaded post 272, and the upper wedge seat 273 and the threaded post 272 are fastened together by fastening bolts 274. The bottom of the upper wedge seat 273 is provided with an inclined surface that matches the lower wedge seat 271.

[0058] The bottom of the support frame 2 is inserted into the welding plate in the form of a clamping plate, which can be used to attach to the existing welding platform. The clamping plate is perpendicular to the lower horizontal plate 22, which can also provide good stability. At the same time, with the cooperation of the simple fastening structure 27, the support frame 2 can be quickly locked onto the welding plate to prevent it from moving at will and ensure the positioning effect.

[0059] The third implementation differs from the first implementation in that: two sets of clamping components 5 are symmetrically arranged. The clamping components 5 include two inverted U-shaped sleeves 51 that are fastened to the support shaft assembly 4, specifically support tubes 41. The two inverted U-shaped sleeves 51 are fixedly connected by a connecting rod 52. A clamping rod 53 is rotatably connected to the top of the inverted U-shaped sleeve 51. A positioning seat 54 is rotatably connected to the middle of one side of the clamping rod 53 via a horizontal shaft, and a lead screw 55 is rotatably connected inside the positioning seat 54. A threaded seat 56 is rotatably connected to the middle of one side of the clamping rod 53 via a horizontal shaft. The threaded seat 56 is threaded around the lead screw 55, and a crank handle 57 is fixedly connected to the end of the lead screw 55 away from the positioning seat 54. The fixed top end of the clamping rod 53 is bent to the other side to form a clamping section 58, and the clamping section 58 has a curved arc structure that bends away from the spray pipe of the sprinkler truck. A rubber pad can also be placed on its inner arc surface, which improves the clamping and fitting effect and reduces pressure damage to the spray pipe.

[0060] The independently set clamping component 5 can be easily installed on the front and rear support shaft components 4. The clamping component 5 can also tighten the two rows of clamping components 5 to reduce their deformation. The two complement each other. Moreover, the angle of the clamping component 5 can be expanded and contracted to adapt to different sizes of sprinkler truck spray pipes, making it highly adaptable.

[0061] This invention also discloses a method for using a welding positioning device for processing spray pipes for sprinkler trucks, comprising the following steps:

[0062] S1. First, based on the length of the water truck spray pipe to be welded, place the two support frames 2 at appropriate intervals on the welding table 1, and place the appropriate connecting pipe sleeve 43 on the semi-circular surface 32 of the connecting seat assembly 3. At this time, the spacing of the support frames 2 can be further fine-tuned to ensure that the connecting pipe sleeve 43 rests on the semi-circular surface 32, while the support wheel 42 rests on the smooth arc-shaped bracket 37. At the same time, keep the slots 26 at the bottom of the fixed plate 24 and the movable plate 25 engaged with the welding plate. Then rotate the fastening bolt 274 to press down the upper wedge seat 273, and make the inclined surface at the bottom of the upper wedge seat 273 press the lower wedge seat 271. The contact of the inclined surface causes the lower wedge seat 271 to drive the movable clamping plate 25 to move. The movable clamping plate 25 and the slot 26 on the fixed clamping plate 24 are misaligned to clamp the welding upright plate, thereby fixing the support frame 2. Then, depending on the way the sprinkler truck spray pipe is to be welded, select the adjustment of the connecting seat assembly 3 to rotate and press the support shaft assembly 4 in a locking manner.

[0063] To perform a rotational clamping, rotate the hyperboloid clamping block 332 until the smooth semicircular arc surface 336 faces downwards to clamp the connecting sleeve 43, and then rotate the locking pin 331 to insert it into the locking groove 35; to perform a locking clamping, rotate the hyperboloid clamping block 332 until the toothed semicircular arc surface 334 faces downwards, and then rotate the locking pin 331 again to lock it.

[0064] S2. Using a crane or forklift, lift the water truck spray pipe with a lifting rope and place it on the support wheel 42 on the support shaft assembly 4. If the water truck spray pipe is to be axially welded, adjust the weld seam to be welded to face upwards, and further install the clamping assembly 5 on the support shaft assembly 4 at both ends of the water truck spray pipe. Manually crank the crank handle 57 to drive the screw 55 to rotate, and then use the threaded engagement with the threaded seat 56 to drive the clamping rods 53 and clamping section 58 on both sides to tighten, squeezing the water truck spray pipe to close the weld seam to be welded.

[0065] S3. Start the welding device and weld the spray pipe of the sprinkler truck according to the set program.

[0066] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding positioning device for processing sprinkler truck spray pipes, comprising a welding table and a positioning fixture detachably mounted on it for placing the sprinkler truck spray pipes, characterized in that: The positioning fixture includes: A pair of support frames are provided and installed on the welding plate of the welding table, and a connecting seat assembly is installed at each of the two top corners of the support frame; A pair of support shaft assemblies are provided, with both ends of the support shaft assembly clamped within the connecting seat assembly. By switching the connecting seat assembly mode to cooperate with the support shaft assembly, dual modes of rotation and fixation of the support shaft assembly can be achieved. The rotation mode of the support shaft assembly is used for circumferential welding of the sprinkler truck spray pipe, and the fixation mode of the support shaft assembly is used for axial welding of the sprinkler truck spray pipe. The support shaft assembly includes a support tube, and multiple support wheels are symmetrically fixedly sleeved on the surfaces of the left and right sections of the support tube. Except for the two central support wheels, all other support wheels are installed on the support tube through connecting pipe sleeves. The center distance of the support wheels is maintained as a multiple of the welding plate spacing, thereby ensuring that when the support frame is adjusted to connect to the connecting pipe sleeves at different positions, the bottom of the support frame can accurately engage with the welding plate. The clamping assembly is mounted on the support shaft assembly to clamp the water truck spray pipe and bring the seam to be welded closer together; The connecting seat assembly includes a support seat, the top of which has a semi-circular arc surface to support the support shaft assembly. A double-sided clamping structure is rotatably connected to one side of the support seat, and one end of the double-sided clamping structure is locked to the other side of the support seat by a locking pin. One side of the double-sided clamping structure is a smooth semi-circular arc surface, and the other side is a toothed semi-circular arc surface. The support shaft assembly has teeth that are adapted to the toothed semi-circular arc surface. The double-sided clamping structure includes a hyperboloid pressure block. The smooth semi-circular arc surface and the toothed semi-circular arc surface are formed on both sides of the hyperboloid pressure block. One end of the hyperboloid pressure block is rotatably connected to a ball head seat on one side of the support seat through a ball head. The other end of the hyperboloid pressure block is rotatably connected to a carrying handle. The locking pin is rotatably sleeved on the movable end of the carrying handle. A locking groove adapted to the locking pin is formed on the other side of the support seat. The connecting sleeve includes a connecting section connected to the connecting seat assembly. The connecting section is fixedly connected to the support tube by bolts. A central tube is fixedly connected to one side of the connecting section for mounting the support wheel. Annular grooves are formed at both ends of the surface of the connecting section. A ball bearing adapted to the annular groove is rotatably connected to the inner surface of the semi-circular arc surface. A smooth arc-shaped bracket for supporting the support wheel is also fixedly connected to one side of the support seat. A convex tooth adapted to the toothed semi-circular arc surface is formed in the middle of the surface of the connecting section.

2. The welding positioning device for processing spray pipes for sprinkler trucks according to claim 1, characterized in that: The upper half of the connecting sleeve of the support tube is integrally machined with a pulley groove at the end away from the central tube. A low-speed motor is installed on one side of the support frame, and a pulley is installed at the output end of the low-speed motor. The pulley and the two pulley grooves on the same plane on the two support shaft assemblies are connected by belt drive. A tensioning wheel mechanism for tensioning the belt is also installed on the support frame.

3. The welding positioning device for processing spray pipes for sprinkler trucks according to claim 2, characterized in that: The tensioning wheel mechanism includes a bent rod that slides through the top of the support frame. One end of the bent rod is rotatably fitted with a pressure wheel for pressing down the belt. The bottom end of the bent rod is threaded with a nut. A spring is fitted on the surface of the bent rod between the top of the nut and the support frame.

4. The welding positioning device for processing sprinkler truck spray pipes according to claim 1, characterized in that: The support frame includes an upper horizontal plate and a lower horizontal plate. The two ends of the upper and lower horizontal plates are fixedly connected by columns. Fixed clamping plates are fixedly connected to the bottom of both ends of the lower horizontal plate. A movable clamping plate is sleeved in the middle of the lower horizontal plate. Slots adapted to the welding plate are opened in both the fixed and movable clamping plates. A fastening structure is provided at the connection between the lower horizontal plate and the movable clamping plate. The movable clamping plate moves on the lower horizontal plate in a direction perpendicular to the welding plate under the thrust of the fastening structure to cooperate with the fixed clamping plate to clamp the welding plate. A transverse groove adapted to the lower horizontal plate is opened on the movable clamping plate. Supporting ribs are fixedly connected to both sides of the lower horizontal plate at the bottom of the movable and fixed clamping plates. The support ribs on both sides of the fixed clamping plate are fixedly connected to the fixed clamping plate, and the support ribs on both sides of the movable clamping plate are slidably connected to the movable clamping plate.

5. The welding positioning device for processing spray pipes for sprinkler trucks according to claim 4, characterized in that: The fastening structure includes a threaded post fixedly connected to the top of the lower horizontal plate and a lower wedge-shaped seat fixedly connected to the side of the movable plate. The upper wedge-shaped seat and the threaded seat are fastened together by fastening bolts. The bottom of the upper wedge-shaped seat has an inclined surface that matches the lower wedge-shaped seat.

6. The welding positioning device for processing spray pipes for sprinkler trucks according to claim 1, characterized in that: Two sets of clamping assemblies are symmetrically arranged. Each clamping assembly includes two inverted U-shaped sleeves that are fastened to the support shaft assembly. The two inverted U-shaped sleeves are fixedly connected by a connecting rod. A clamping rod is rotatably connected to the top of each inverted U-shaped sleeve. A positioning seat is rotatably connected to the middle of one side of the clamping rod via a horizontal shaft, and a lead screw is rotatably connected inside the positioning seat. A threaded seat is rotatably connected to the middle of one side of the clamping rod via a horizontal shaft. The threaded seat is threaded onto the outside of the lead screw, and a crank is fixedly connected to the end of the lead screw away from the positioning seat. The fixed top end of the clamping rod is bent to the other side to form a clamping section, and the clamping section has a curved arc structure that bends away from the spray pipe of the sprinkler truck.

7. A method of using the welding positioning device for processing the spray pipe of a sprinkler truck according to any one of claims 1-6, characterized in that: Includes the following steps: S1. First, based on the length of the water truck spray pipe to be welded, place the two support brackets at a suitable distance on the welding table, place the support shaft assembly on the two support brackets, further fine-tune the distance between the support brackets, and then fix the support brackets tightly. After that, depending on the method of welding the water truck spray pipe, select and adjust the connecting seat assembly to rotate and press the support shaft assembly into a locking manner. S2. Use a crane or forklift with a lifting rope to lift the water truck spray pipe and place it on the support shaft assembly. If you want to perform axial welding on the water truck spray pipe, adjust the weld seam to be welded to face upwards, and further install clamping components on the support shaft assembly at both ends of the water truck spray pipe. Manually tighten the clamping components to squeeze the water truck spray pipe and make the weld seam to be welded close. S3. Start the welding device and weld the spray pipe of the sprinkler truck according to the set program.

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