PPH purification tank outer bottom welding tool and welding process

Abstract

The present invention relates to a welding tool for the outer bottom of a PPH purification tank and a welding process thereof, and relates to the field of welding technology. The tool comprises a welding base, a tank body bearing device, a welding alignment device and a tank bottom traction device. The tank body bearing device is slidably installed on the welding base. A control hole is provided at the bottom of the welding base. The welding alignment device has a heating surface, which passes through the control hole upward. The tank bottom traction device comprises a tank bottom traction support rod, a lifting screw sleeve, a first deflection motor and a second deflection motor. A sliding plate is provided at the bottom of the tank bottom traction support rod. The first deflection motor is connected to the sliding plate for transmission. The second deflection motor is connected to the sliding plate for transmission. The lifting screw sleeve is installed on the top of the tank bottom traction support rod through a threaded pair. The lifting screw sleeve supports the welding alignment device, and precise welding can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, in particular to a PPH purification tank outer bottom welding tool and a welding process thereof. Background Art

[0002] The PPH (Preheating Phosphorus Hydrocarbon) (PPH) septic tank welding process primarily involves extruding molten material into the joint for welding. This is the most commonly used welding method for PPH septic tanks. Before welding, ensure a dry, draft-free, and dust-free environment. Use specialized cutting tools to cut the PPH septic tank body to the desired length, and trim the bottom. The cut surface should be flat, smooth, and free of cracks and burrs. Clean the septic tank body and bottom to remove impurities such as oil, moisture, and dust. Adjust the preheat pressure to the required welding pressure, and set the heat-melt welding temperature using the welder control panel, typically between 195°C and 205°C. During the preheating process, keep the septic tank body and bottom stable to avoid misalignment. Align the end surfaces of the septic tank body and bottom and secure them with a clamp. Extrude the molten material into the weld seam to ensure full fusion and a tight connection. After welding, allow the weld to cool naturally to room temperature. Visually inspect the weld joint to ensure it is free of defects such as cracks and pores. A pressure test is performed to verify its sealing and reliability.

[0003] Based on the above method, since the septic tank bottom and body are very heavy and large, the fixtures required for welding need to be specially designed to ensure stable and convenient docking. However, due to the lack of a controlled attachment point on the bottom, it is difficult to adjust the position of the bottom during welding. This difficulty in docking is a shortcoming of the existing PPH septic tank welding tooling design. Summary of the Invention

[0004] In order to overcome the technical defects of the prior art, the present invention provides a PPH purification tank outer bottom welding tool and a welding process thereof, which can achieve precise welding.

[0005] The technical solution adopted by the present invention is:

[0006] The outer bottom welding tool of the PPH purification tank includes a welding base, a tank body carrying device, a welding alignment device and a tank bottom traction device, the tank body carrying device can be lifted and slidably installed on the welding base, the bottom of the welding base is provided with a control hole, the welding alignment device passes through the control hole, the welding alignment device has a heating surface, the heating surface passes through the control hole upward, the tank bottom traction device is transmission-connected with the welding alignment device, the tank bottom traction device includes a tank bottom traction support rod, a jacking screw sleeve, a first deflection motor and a second deflection motor, the bottom of the tank bottom traction support rod is provided with a sliding plate, the output end of the first deflection motor is transmission-connected to the sliding plate through a first lead screw, the output end of the second deflection motor is transmission-connected to the sliding plate through a second lead screw, the output end of the first deflection motor and the first lead screw are transmission-connected through a first flexible coupling, the output end of the second deflection motor and the second lead screw are transmission-connected through a second flexible coupling, the jacking screw sleeve is installed on the top of the tank bottom traction support rod through a threaded pair, and the jacking screw sleeve supports the welding alignment device.

[0007] Preferably, the welding base includes a base bracket, a plurality of lifting sleeves and a plurality of lifting screw devices, each of the lifting sleeves is installed on the base bracket, the trough body bearing device is slidably installed in the lifting sleeve, the lifting screw device is installed at the bottom of the lifting sleeve, and each of the lifting screw devices supports the bottom of the trough body bearing device.

[0008] Preferably, the output ends of the first skew motor and the second skew motor are directed perpendicular to each other.

[0009] Preferably, the sliding plate is provided with two transmission pins with vertical axes, each transmission pin is rotatably mounted on the sliding plate with its axis vertical, and each transmission pin is respectively connected to the first lead screw and the second lead screw via a threaded pair.

[0010] Preferably, the trough body supporting device includes an upper welded limiting arc plate and a plurality of lifting columns, each of the lifting columns is installed on the upper welded limiting arc plate, each of the lifting columns slides along the lifting sleeve, and the inner side of the upper welded limiting arc plate is provided with a bearing baffle for supporting the purification trough body, and the diameter of each of the lifting columns is smaller than the inner diameter of the lifting sleeve.

[0011] Preferably, the welding alignment device includes a welding alignment plate, a welding control plate and a welding control rod, the welding alignment plate is located in the control hole, the top of the welding alignment plate has a heating surface, the welding control plate is installed on the lower side of the welding alignment plate, the welding control rod is installed on the lower side of the welding control plate, and the groove bottom traction device is installed under the welding control rod and supports the welding control rod.

[0012] Preferably, a plurality of heating protrusions are provided on the top of the welding centering plate, and each of the heating protrusions is conical.

[0013] The PPH septic tank welding process, using the PPH septic tank outer bottom welding tooling, includes the following steps:

[0014] S1: Hoist the bottom of the PPH septic tank and place it in the welding base;

[0015] S2: Pass the welding alignment device upward through the control hole, and fuse the welding alignment device to the outer side of the bottom of the purification tank;

[0016] S3: The tank bottom traction device pulls and lifts the welding alignment device, thereby changing the position of the purification tank bottom;

[0017] S4: Hoist the purification tank body of the PPH purification tank into the tank body carrying device, adjust the position of the purification tank bottom and the purification tank body, and then perform welding.

[0018] The beneficial effects of the present invention are:

[0019] The trough body supporting device can be installed on the welding base in a lifting and sliding manner. The trough body supporting device is used to limit the position of the purification trough body. A control hole is provided at the bottom of the welding base. The welding alignment device passes through the control hole upward. The welding alignment device has a heating surface. The heating surface passes through the control hole upward. When controlling the position of the bottom of the purification trough, the heating surface is pressed against the bottom of the purification trough. After the heating surface and the bottom of the purification trough are embedded, it is convenient for the heating surface to change the horizontal position of the bottom of the purification trough, thereby controlling the horizontal position of the bottom of the purification trough. The trough bottom traction device is transmission-connected to the welding alignment device. The trough bottom traction device is used to control the relative horizontal position of the purification trough body and the bottom of the purification trough, thereby aligning the position of the welding device.

[0020] The trough bottom traction device includes a trough bottom traction support rod, a jacking screw sleeve, a first skew motor and a second skew motor. A sliding plate is provided at the bottom of the trough bottom traction support rod. The sliding plate maintains the posture of the trough bottom traction support rod. The output end of the first skew motor is connected to the sliding plate through a first lead screw, and the output end of the second skew motor is connected to the sliding plate through a second lead screw, thereby pulling the sliding plate to adjust its position in the horizontal direction, so that workers can align the weld position of the purification tank body and the bottom of the purification tank in the PPH purification tank. The output end of the first skew motor and the first lead screw are connected through a first flexible coupling, and the output end of the second skew motor and the second lead screw are connected through a second flexible coupling to prevent interference. The jacking screw sleeve is installed on the top of the trough bottom traction support rod through a threaded pair. The jacking screw sleeve supports the welding alignment device, thereby lifting the bottom of the purification tank until the weld width meets the requirements, and it is convenient for the first skew motor and the second skew motor to drive the welding alignment device to move horizontally. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the working principle of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure after installation of the present invention.

[0023] Figure 3 It is a schematic diagram of the decomposition structure of the present invention.

[0024] Figure 4 Schematic diagram of the working principle of the load-bearing baffle.

[0025] Figure 5 This is a schematic diagram of the installation relationship between the welding alignment device and the groove bottom traction device.

[0026] Figure 6 This is a cross-sectional diagram showing the installation relationship between the welding alignment device and the groove bottom traction device.

[0027] Figure 7 This is a schematic diagram of the position of the jacking screw device.

[0028] Description of reference numerals:

[0029] 1. Welding base; 11. Base bracket; 111. Control hole; 12. Lifting sleeve; 13. Lifting screw device;

[0030] 2. Tank bearing device; 21. Upper welded limit arc plate; 211. Bearing baffle; 22. Lifting column;

[0031] 3. Welding alignment device; 31. Welding centering plate; 311. Heating protrusion; 32. Welding control plate; 33. Welding control rod;

[0032] 4. Slot bottom traction device; 41. Slot bottom traction support rod; 412. Drive pin; 42. Lifting screw; 43. First skew motor; 45. Second skew motor; 411. Sliding plate; 46. First lead screw; 47. Second lead screw; 49. Reference slot;

[0033] 51. Purification tank body; 52. Purification tank bottom. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] like Figure 1 — Figure 7As shown, this embodiment provides a PPH purification tank outer bottom welding tool for welding the purification tank body 51 and the purification tank bottom 52 of the PPH purification tank, including a welding base 1, a tank body supporting device 2, a welding alignment device 3 and a tank bottom traction device 4. The tank body supporting device 2 can be lifted and slidably installed on the welding base 1. The tank body supporting device 2 is used to limit the position of the purification tank body 51 and carry the purification tank body 51. A control hole 111 is provided at the bottom of the welding base 1. The welding alignment device 3 passes through the control hole 111 upward. The welding alignment device 3 has a heating surface. The heating surface passes through the control hole 111 upward. When controlling the position of the purification tank bottom 52, the heating surface is pressed against the purification tank bottom 52. The heating protrusion 311 on the heating surface is engaged with the purification tank bottom 52 to facilitate the heating surface to change the horizontal position of the purification tank bottom 52, thereby controlling the horizontal position of the purification tank bottom 52. The tank bottom traction device 4 is transmission-connected to the welding alignment device 3. The tank bottom traction device 4 is used to control the relative horizontal position of the purification tank body 51 and the purification tank bottom 52, thereby aligning the position of the welding device 3.

[0036] Specifically, the welding base 1 includes a base bracket 11, a plurality of lifting sleeves 12 and a plurality of lifting screw devices 13. Each lifting sleeve 12 is installed on the base bracket 11, and the trough body supporting device 2 is slidably installed in the lifting sleeve 12. The lifting screw device 13 is installed at the bottom of the lifting sleeve 12. Each lifting screw device 13 supports the bottom of the trough body supporting device 2, thereby controlling the height of the trough body supporting device 2.

[0037] Specifically, the trough bottom traction device 4 includes a trough bottom traction support rod 41, a jacking screw sleeve 42, a first deflection motor 43 and a second deflection motor 45. A sliding plate 411 is provided at the bottom of the trough bottom traction support rod 41. The sliding plate 411 is slidably placed in the reference groove 49. The bottom of the reference groove 49 is flat, and the reference groove 49 is filled with lubricating oil. The sliding plate 411 maintains the posture of the trough bottom traction support rod 41. The output end of the first deflection motor 43 is connected to the sliding plate 411 through a first lead screw 46. The output end of the second deflection motor 45 is connected to the sliding plate 411 through a second lead screw 47, thereby pulling the sliding plate 411 horizontally. The direction adjustment position is convenient for workers to align the weld position of the purification tank body 51 and the purification tank bottom 52 in the PPH purification tank. The output end of the first deflection motor 43 and the first screw 46 are connected by a first flexible coupling, and the output end of the second deflection motor 45 and the second screw 47 are connected by a second flexible coupling to prevent interference. The lifting screw sleeve 42 is installed on the top of the traction support rod 41 at the bottom of the tank through a threaded pair. The lifting screw sleeve 42 supports the welding alignment device 3, and then lifts the purification tank bottom 52 until the weld width meets the requirements, and facilitates the first deflection motor 43 and the second deflection motor 45 to drive the welding alignment device 3 to move horizontally.

[0038] Specifically, two transmission pins 412 with vertical axes are provided on the sliding plate 411. Each transmission pin 412 is rotatably installed on the sliding plate 411 with its axis vertical. Each transmission pin 412 is respectively connected to the first screw 46 and the second screw 47 through a threaded pair. Since the transmission pin 412 is rotatable, interference is further avoided.

[0039] Specifically, the output ends of the first skew motor 43 and the second skew motor 45 are directed perpendicularly to each other, thereby achieving lateral movement adjustment at any position in the horizontal direction.

[0040] Specifically, the trough body supporting device 2 includes an upper welded limiting arc plate 21 and a plurality of lifting columns 22. Each lifting column 22 is installed on the upper welded limiting arc plate 21. Each lifting column 22 slides along the lifting sleeve 12. The inner side of the upper welded limiting arc plate 21 is provided with a bearing baffle 211 for supporting the purification trough body 51. In order to facilitate the elastic bending of the upper welded limiting arc plate 21, the bearing baffle 211 has a plurality of expansion joints. The diameter of each lifting column 22 is smaller than the inner diameter of the lifting sleeve 12. After the two ends of the upper welded limiting arc plate 21 are locked with each other by bolts, the purification trough body 51 is held to prevent it from tipping over. Then the lifting screw device 13 is rotated to adjust the bottom welding position of the purification trough body 51 to a horizontal state.

[0041] Specifically, the welding alignment device 3 includes a welding alignment plate 31, a welding control plate 32 and a welding control rod 33. The welding alignment plate 31 is located in the control hole 111. The top of the welding alignment plate 31 has a heating surface, and the heating surface is provided with a number of electrically heated heating protrusions 311 to prevent the heating surface and the bottom of the purification tank 52 from sliding laterally. The welding control plate 32 is installed on the lower side of the welding alignment plate 31, and the welding control rod 33 is installed on the lower side of the welding control plate 32. The bottom traction device 4 is installed under the welding control rod 33 and supports the welding control rod 33. The heating surface melts the outside of the bottom of the purification tank 52, thereby causing the heating surface and the bottom of the purification tank 52 to stick together, so that the bottom traction device 4 pulls the welding control rod 33, driving the bottom of the purification tank 52 to accurately adjust its position.

[0042] Specifically, a plurality of heating protrusions 311 are provided on the top of the welding centering plate 31 , and each heating protrusion 311 is tapered to increase the gripping force.

[0043] The PPH septic tank welding process, using the PPH septic tank outer bottom welding tooling, includes the following steps:

[0044] S1: hoisting and placing the bottom 52 of the PPH septic tank in the welding base 1;

[0045] S2: The welding alignment device 3 is passed upward through the control hole 111, and the welding alignment device 3 is melted and attached to the outer side of the purification tank bottom 52;

[0046] S3: The tank bottom pulling device 4 pulls and lifts the welding alignment device 3, thereby changing the position of the purification tank bottom 52 of the purification tank;

[0047] S4: The purification tank body 51 of the PPH purification tank is hoisted into the tank body carrying device 2, and the position of the purification tank bottom 52 and the purification tank body 51 are adjusted before welding.

[0048] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. PPH purification tank outer bottom welding tooling, characterized by: The trough bottom traction device is a kind of trough bottom traction device, and the trough bottom traction device is a kind of trough bottom traction device. The trough bottom traction device comprises a welding base, a trough body carrying device, a welding alignment device and a trough bottom traction device, the trough body carrying device can be lifted and slidably installed on the welding base, the bottom of the welding base is provided with a control hole, the welding alignment device passes through the control hole, the welding alignment device has a heating surface, the heating surface passes through the control hole upward, the trough bottom traction device is connected to the welding alignment device by transmission, the trough bottom traction device comprises a trough bottom traction support rod, a lifting screw sleeve, a first deflection motor and a second deflection motor, the bottom of the trough bottom traction support rod is provided with a sliding plate, the sliding plate is slidably placed in the reference groove, the bottom of the reference groove is flat, and the reference groove is filled with lubricating oil, the output end of the first deflection motor is connected to the sliding plate by a first lead screw, the output end of the second deflection motor is connected to the sliding plate by a second lead screw, and the output end of the first deflection motor and the first lead screw are connected by a first flexible The jacking screw is installed on the top of the traction support rod at the bottom of the groove, and the jacking screw supports the welding alignment device. The sliding plate is provided with two transmission pins with vertical axes, and each transmission pin is rotatably installed on the sliding plate in a manner with vertical axes, and each transmission pin is respectively connected to the first screw and the second screw through a threaded pair. The welding alignment device includes a welding centering plate, a welding control plate and a welding control rod. The welding centering plate is located in the control hole, and the top of the welding centering plate has a heating surface, the welding control plate is installed on the lower side of the welding centering plate, and the welding control rod is installed on the lower side of the welding control plate. The groove bottom traction device is installed under the welding control rod and supports the welding control rod. The top of the welding centering plate is provided with a plurality of heating protrusions, and each of the heating protrusions is conical.

2. The PPH purification tank outer bottom welding tool according to claim 1, characterized in that: The welding base includes a base bracket, several lifting sleeves and several lifting screw devices. Each lifting sleeve is installed on the base bracket. The trough body bearing device is slidably installed in the lifting sleeve. The lifting screw device is installed at the bottom of the lifting sleeve. Each lifting screw device supports the bottom of the trough body bearing device.

3. The PPH purification tank outer bottom welding tool according to claim 1 is characterized in that: The output ends of the first skew motor and the second skew motor are directed perpendicular to each other.

4. The PPH purification tank outer bottom welding tool according to claim 1, characterized in that: The trough body supporting device includes an upper welded limiting arc plate and several lifting columns. Each lifting column is installed on the upper welded limiting arc plate. Each lifting column slides along the lifting sleeve. The inner side of the upper welded limiting arc plate is provided with a bearing baffle for supporting the purification trough body. The diameter of each lifting column is smaller than the inner diameter of the lifting sleeve.

5. A PPH purification tank welding process using the PPH purification tank outer bottom welding tool according to claim 1, characterized in that: The steps include: S1: Hoist the bottom of the PPH septic tank and place it in the welding base; S2: Pass the welding alignment device upward through the control hole, and fuse the welding alignment device to the outer side of the bottom of the purification tank; S3: The tank bottom traction device pulls and lifts the welding alignment device, thereby changing the position of the purification tank bottom; S4: Hoist the purification tank body of the PPH purification tank into the tank body carrying device, adjust the position of the purification tank bottom and the purification tank body, and then perform welding.

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