PPH purification tank outer bottom welding tool and welding process thereof

Abstract

The invention relates to a PPH purification tank outer bottom welding tool and a welding process thereof, and relates to the technical field of welding, the PPH purification tank outer bottom welding 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 formed in the bottom of the welding base, and the welding alignment device is provided with a heating surface; the groove bottom traction device comprises a groove bottom traction supporting rod, a jacking threaded sleeve, a first deflection motor and a second deflection motor, a sliding flat plate is arranged at the bottom of the groove bottom traction supporting rod, the first deflection motor is in transmission connection with the sliding flat plate, and the second deflection motor is in transmission connection with the sliding flat plate; the jacking threaded sleeve is installed on the top of the groove bottom traction rod through a thread pair, the jacking threaded sleeve abuts against the welding alignment device, and accurate welding can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and particularly to a welding tooling for the outer bottom of a PPH purification tank and its welding process. Background Art

[0002] ‌The PPH purification tank welding process mainly involves extruding molten material to the butt joint position to achieve welding, which is the most commonly used welding method for PPH purification tanks. Before welding, ensure that the welding environment is dry, windless, and dust-free. Use a special cutting tool to cut the PPH purification tank body into the required length and trim the bottom of the purification tank. The cutting surface should be flat, smooth, without cracks and burrs. Clean the surfaces of the purification tank body and the bottom of the purification tank to remove impurities such as oil, moisture, and dust‌; adjust the preheating pressure to the welding required pressure, and set the temperature of the hot melt welding through the welder control platform, usually set between 195°C and 205°C. Keep the purification tank body and the bottom of the purification tank stable during the preheating process to avoid misalignment‌; align the end faces of the purification tank body and the bottom of the purification tank and fix them with clamps. Extrude the molten material to the weld position to make the molten material fully fuse to form a tight connection‌; after welding, let the weld cool naturally to room temperature. Conduct an appearance inspection of the welded joint to ensure that there are no defects such as cracks and pores. Conduct a pressure test to verify its sealing performance and reliability‌.

[0003] Based on the above method, since the bottom of the purification tank and the purification tank body are very heavy and large in size, the fixture tooling used during welding needs to be specially designed to ensure stable and convenient butt joint. When welding the bottom of the purification tank and the purification tank body, it is difficult to adjust the position of the bottom of the purification tank due to the lack of controlled attachment points on the bottom of the purification tank. This makes the butt joint difficult, which is a drawback in the design of the existing PPH purification tank welding tooling. Summary of the Invention

[0004] To overcome the technical defects existing in the prior art, the present invention provides a welding tooling for the outer bottom of a PPH purification tank and its welding process, which can achieve precise welding.

[0005] The technical solution adopted by the present invention is: PPH purification tank outer bottom welding tooling, including a welding base, a tank body bearing device, a welding alignment device and a tank bottom traction device. The tank body bearing device is installed on the welding base in a liftable and slidable manner. A control hole is provided at the bottom of the welding base. The welding alignment device passes through the control hole. The welding alignment device has a heating surface, and the heating surface passes upward through the control hole. The tank bottom traction device is in transmission connection with the welding alignment device. The tank bottom traction device includes a tank bottom traction support rod, a jacking screw sleeve, a first skew motor and a second skew motor. A sliding flat plate is provided at the bottom of the tank bottom traction support rod. The output end of the first skew motor is in transmission connection with the sliding flat plate through a first lead screw. The output end of the second skew motor is in transmission connection with the sliding flat plate through a second lead screw. A first flexible coupling is used for transmission connection between the output end of the first skew motor and the first lead screw. A second flexible coupling is used for transmission connection between the output end of the second skew motor and the second lead screw. The jacking screw sleeve is installed at the top of the tank bottom traction rod through a thread pair, and the jacking screw sleeve abuts against the welding alignment device.

[0006] Preferably, the welding base includes a base bracket, a plurality of lifting sleeves and a plurality of jacking screw rod devices. Each lifting sleeve is installed on the base bracket. The tank body bearing device is slidably installed in the lifting sleeve. The jacking screw rod device is installed at the bottom of the lifting sleeve, and each jacking screw rod device abuts against the bottom of the tank body bearing device.

[0007] Preferably, the directions of the output ends of the first skew motor and the second skew motor are perpendicular to each other.

[0008] Preferably, two drive pins with vertically arranged axes are provided on the sliding flat plate. Each drive pin is rotatably installed on the sliding flat plate in a manner with a vertically arranged axis. Each drive pin is in transmission connection with the first lead screw and the second lead screw through a thread pair.

[0009] Preferably, the tank body bearing device includes an upper welding limit arc plate and a plurality of lifting columns. Each lifting column is installed on the upper welding limit arc plate. Each lifting column slides along the inside of the lifting sleeve. A bearing baffle for bearing the purification tank body is provided on the inner side of the upper welding limit arc plate. The diameter of each lifting column is smaller than the inner diameter of the lifting sleeve.

[0010] Preferably, 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. 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. The welding control rod is installed on the lower side of the welding control plate. The tank bottom traction device is installed under the welding control rod and abuts against the welding control rod.

[0011] Preferably, a plurality of heating protrusions are provided on the top of the welding centering plate, and each heating protrusion is conical.

[0012] The PPH septic tank welding process, using the PPH septic tank outer bottom welding tooling, includes the following steps: 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 melt the welding alignment device to fit 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 tank bottom of the purification tank; S4: The purification tank body of the PPH purification tank is hoisted into the tank body bearing device, and welding is performed after adjusting the position of the purification tank bottom and the purification tank body.

[0013] The beneficial effects of the present invention are: 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 with 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.

[0014] The trough bottom traction device includes a trough bottom traction support rod, a lifting 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, and 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 is connected to the first lead screw through a first flexible coupling, and the output end of the second skew motor is connected to the second lead screw through a second flexible coupling to prevent interference. The lifting screw sleeve is installed on the top of the trough bottom traction rod through a threaded pair, and the lifting 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

[0015] Figure 1 It is a schematic diagram of the working principle of the structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure after installation of the present invention.

[0017] Figure 3 This is the decomposition structure schematic diagram of the present invention.

[0018] Figure 4 This is the schematic diagram of the working principle of the bearing baffle.

[0019] Figure 5 This is the schematic diagram of the installation relationship between the welding alignment device and the bottom groove traction device.

[0020] Figure 6 This is the sectional schematic diagram of the installation relationship between the welding alignment device and the bottom groove traction device.

[0021] Figure 7 This is the schematic diagram of the position of the jacking screw device.

[0022] Explanation of reference numerals: 1. Welding base; 11. Base bracket; 111. Control hole; 12. Lifting sleeve; 13. Jacking screw device; 2. Tank body bearing device; 21. Upper welding limit arc plate; 211. Bearing baffle; 22. Lifting column; 3. Welding alignment device; 31. Welding centering plate; 311. Heating protrusion; 32. Welding control plate; 33. Welding control rod; 4. Bottom groove traction device; 41. Bottom groove traction strut; 412. Transmission pin; 42. Jacking nut; 43. First skew motor; 45. Second skew motor; 411. Sliding flat plate; 46. First lead screw; 47. Second lead screw; 49. Reference groove; 51. Purification tank body; 52. Purification tank bottom. Detailed implementation manners

[0023] The present invention will be further described below in conjunction with the accompanying drawings: As Figure 1 — Figure 7As shown, the present embodiment provides a welding tool for the outer bottom of a PPH purification tank, which is used to weld a purification tank body 51 and a purification tank bottom 52 of the PPH purification tank, and includes a welding base 1, a tank body bearing device 2, a welding alignment device 3 and a tank bottom traction device 4. The tank body bearing device 2 can be lifted and slidably installed on the welding base 1. The tank body bearing 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, which passes through the control hole 111 upward. When controlling the position of the purification tank bottom 52, the heating surface is supported against the purification tank bottom 52. After the heating protrusion 311 on the heating surface and the purification tank bottom 52 are engaged, it is convenient for 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 with 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.

[0024] 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. The trough body bearing 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 bearing device 2, thereby controlling the height of the trough body bearing device 2.

[0025] Specifically, the bottom traction device 4 includes a bottom traction support rod 41, a lifting 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 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 a plane, and the reference groove 49 is filled with lubricating oil. The sliding plate 411 maintains the posture of the 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 in The position is adjusted in the horizontal direction to facilitate workers to align the welding positions of the purification tank body 51 and the purification tank bottom 52 in the PPH purification tank. The output end of the first skew motor 43 is connected to the first lead screw 46 through a first flexible coupling, and the output end of the second skew motor 45 is connected to the second lead screw 47 through a second flexible coupling to prevent interference. The lifting screw sleeve 42 is installed on the top of the traction rod at the bottom of the tank through a threaded pair. The lifting screw sleeve 42 supports the welding alignment device 3, thereby lifting the purification tank bottom 52 until the weld width meets the requirements, and the first skew motor 43 and the second skew motor 45 are convenient for driving the welding alignment device 3 to move horizontally.

[0026] Specifically, two drive pins 412 with vertically arranged axes are provided on the sliding flat plate 411. Each drive pin 412 is rotatably installed on the sliding flat plate 411 in a manner with its axis vertical. Each drive pin 412 is respectively connected to the first lead screw 46 and the second lead screw 47 through a thread pair for transmission. Since the drive pin 412 can rotate, interference is further avoided.

[0027] Specifically, the directions of the output ends of the first skew motor 43 and the second skew motor 45 are perpendicular to each other, thereby realizing the lateral movement adjustment at any position in the horizontal direction.

[0028] Specifically, the tank body bearing device 2 includes an upper welded limit arc plate 21 and a plurality of lifting columns 22. Each lifting column 22 is installed on the upper welded limit arc plate 21. Each lifting column 22 slides inside the lifting sleeve 12. A bearing baffle 211 for bearing the purification tank body 51 is provided on the inner side of the upper welded limit arc plate 21. For the convenience of the elastic bending of the upper welded limit 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 limit arc plate 21 are locked to each other by bolts, the purification tank body 51 is held to prevent it from tipping over. Then, the jacking screw device 13 is rotated, thereby adjusting the bottom welding position of the purification tank body 51 to be in a horizontal state.

[0029] Specifically, the welding alignment device 3 includes a welding centering plate 31, a welding control plate 32 and a welding control rod 33. The welding centering plate 31 is located in the control hole 111. The top of the welding centering plate 31 has a heating surface, and a plurality of heating protrusions 311 for electric heating are provided on the heating surface to prevent the heating surface from sliding horizontally with the bottom of the purification tank. The welding control plate 32 is installed on the lower side of the welding centering plate 31, and the welding control rod 33 is installed on the lower side of the welding control plate 32. The tank bottom traction device 4 is installed under the welding control rod 33 and abuts against 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 adhere together. Then, the tank bottom traction device 4 pulls the welding control rod 33 to drive the bottom of the purification tank 52 to accurately adjust its position.

[0030] Specifically, a plurality of heating protrusions 311 are provided on the top of the welding centering plate 31, and each heating protrusion 311 is conical to increase the grasping force.

[0031] The PPH purification tank welding process uses a PPH purification tank outer bottom welding tooling, which includes the following steps: S1: Hoist and place the bottom 52 of the PPH purification tank in the welding base 1; S2: Pass the welding alignment device 3 upward through the control hole 111, and the welding alignment device 3 melts and adheres to the outside of the bottom 52 of the purification tank of the purification tank; S3: The bottom traction device 4 of the groove traction and jack up the welding alignment device 3, thereby changing the position of the purification tank bottom 52 of the purification tank; S4: Hoist the purification tank body 51 of the PPH purification tank into the tank body bearing device 2. After adjusting the positions of the purification tank bottom 52 and the purification tank body 51, welding is carried out.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. PPH septic tank outer bottom welding tooling, characterized in that: The invention comprises a welding base, a trough body bearing device, a welding alignment device and a trough bottom traction device, wherein the trough body bearing device can be lifted and slidably installed on the welding base, a control hole is provided at the bottom of the welding base, 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 transmission-connected with the welding alignment device, 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, a sliding plate is provided at the bottom of the trough bottom traction support rod, the output end of the first deflection motor is transmission-connected with the sliding plate through a first lead screw, the output end of the second deflection motor is transmission-connected with the sliding plate through a second lead screw, the output end of the first deflection motor is transmission-connected with the first lead screw through a first flexible coupling, the output end of the second deflection motor is transmission-connected with the second lead screw through a second flexible coupling, the lifting screw sleeve is installed on the top of the trough bottom traction rod through a threaded pair, and the lifting screw sleeve supports the welding alignment device.

2. The PPH purification tank outer bottom welding tool according to claim 1 is characterized in that: 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.

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 is characterized in that: 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. Each transmission pin is respectively connected to the first lead screw and the second lead screw through a threaded pair.

5. The PPH purification tank outer bottom welding tool according to claim 2 is characterized in that: The trough body bearing 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 a bearing baffle for bearing the purification trough body is provided on the inner side of the upper welded limiting arc plate, and the diameter of each of the lifting columns is smaller than the inner diameter of the lifting sleeve.

6. The PPH purification tank outer bottom welding tool according to claim 1 is characterized in that: 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. The groove bottom traction device is installed under the welding control rod and supports the welding control rod.

7. The PPH purification tank outer bottom welding tool according to claim 6 is characterized in that: A plurality of heating protrusions are arranged on the top of the welding centering plate, and each of the heating protrusions is conical.

8. A PPH purification tank welding process, using the PPH purification tank outer bottom welding tooling according to claim 1, characterized in that: The steps include: S1: Hoist the bottom of the PPH septic tank into the welding base; S2: Pass the welding alignment device upward through the control hole, and melt the welding alignment device to fit 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 tank bottom of the purification tank; S4: The purification tank body of the PPH purification tank is hoisted into the tank body bearing device, and welding is performed after adjusting the position of the purification tank bottom and the purification tank body.

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