Pipeline cutter for overhauling boiler of thermal power plant

Abstract

The pipeline cutter comprises a double-row support, an inclined plate is installed on the bottom wall of the lower row of the double-row support, and electric telescopic rods are installed in inner cavities of vertical parts on the left side and the right side of the front portion between the two rows of the double-row support. First vertical plates are installed at the upper ends of the two electric telescopic rods correspondingly, the second vertical plate is rotationally connected with a first motor, the first motor is fixed to the middle of the second vertical plate, the two-way threaded rod and the first guide rod are jointly provided with two cutting devices, and a centering adjusting device is arranged in the middle of the second vertical plate. According to the pipeline cutter for thermal power plant boiler overhaul, the two cutting devices are adopted for cutting a boiler pipeline, the whole boiler pipeline in use does not need to be dismantled, only the device needs to be moved to the position below the boiler pipeline needing to be cut, the outer side of the boiler pipeline needing to be cut is sleeved with the cutting devices, and then the boiler pipeline is cut. And the pipeline can be cut through the cutting device, and time and labor are saved.

Description

Technical Field

[0001] The invention relates to the technical field of boiler maintenance, in particular to a pipe cutter for boiler maintenance in a thermal power plant. Background Art

[0002] A thermal power plant, also known as a thermal power plant, is a plant that uses combustibles (such as coal, oil, natural gas, etc.) as fuel to produce electricity;

[0003] The main equipment of a thermal power plant includes boilers, steam turbines, generators, condensers, cooling towers, etc. Among them, the boiler is the energy conversion equipment of a thermal power plant, and its function is to convert the chemical energy of the fuel into the thermal energy of steam;

[0004] During the use of the boiler, various problems are inevitable, such as local blockage due to scale, local leakage of pipes, etc. At this time, it is necessary to repair the problematic pipes;

[0005] The Chinese patent announcement number CN221312700U discloses a pipe cutter for boiler maintenance in a thermal power plant, comprising a bottom plate, a fixing mechanism on the top surface of the bottom plate, the fixing mechanism comprising a first driving rod, a lifting plate fixedly provided at the top end of the first driving rod, two grooves symmetrically distributed are provided at both ends of the lifting plate, moving rods are slidably provided in the two grooves, rotating plates are fixedly provided at both ends of the two moving rods, rotating rods are rotatably inserted in the middle of the two rotating plates, connecting rods are rotatably inserted at the tops of the two rotating plates, and the two connecting rods are located at the inner ends of the two rotating plates and are fixedly sleeved with connecting pieces on the outside. The utility model, by setting a fixing mechanism, fixes the pipe and the cutting machine through the fixing mechanism when cutting the pipe, so that when cutting the pipe, the operator does not need to hold the cutting machine to cut the pipe, which saves the operator's physical strength and is more convenient to use.

[0006] However, the above patent documents still have the following problems:

[0007] Although the above patent can cut the pipe, it can only cut the complete pipe or the completely removed pipe. In reality, the boiler pipe is complicated, and it is difficult to dismantle and install the whole pipe in use. It will also waste some time to move the dismantled whole pipe to the above device for cutting. Therefore, the above device is time-consuming and labor-intensive in implementation. Summary of the invention

[0008] The main purpose of the present invention is to provide a pipe cutter for overhauling boilers in thermal power plants, which can effectively solve the problem of time-consuming and labor-intensive process in cutting pipes.

[0009] To achieve the above object, the technical solution adopted by the present invention is:

[0010] A pipe cutter for boiler maintenance in a thermal power plant comprises a double-row bracket, wherein the four corners of the bottom end of the double-row bracket are fixed with self-locking universal wheels, the bottom wall of the lower row of the double-row bracket is installed with an inclined plate, the inner cavity of the vertical part on the left and right sides of the front between the double rows of the double-row bracket is installed with an electric telescopic rod, the upper ends of the two electric telescopic rods are installed with a vertical plate, a guide rod is fixed in the middle between the opposite surfaces of the two vertical plates, and a bidirectional threaded rod is rotated together at the upper part between the opposite surfaces of the two vertical plates, and one of the vertical plates is away from the double-row bracket. A motor 1 fixedly connected to a bidirectional threaded rod is fixed on the side, and a vertical plate 2 fixed to the front part of the upper end of the double-row bracket is installed in the middle of the outer surface of the motor 1 and the guide rod 1. The vertical plate 2 is rotatably connected to the motor 1, and a motor 1 is fixed in the middle of the vertical plate 2. Two cutting devices are jointly arranged on the outer surfaces of the bidirectional threaded rod and the guide rod 1, and the two cutting devices are symmetrically distributed on the left and right. A centering adjustment device is arranged in the middle of the vertical plate 2, an inclined plate is installed on the bottom wall of the lower row of the double-row bracket, and a handle 1 is installed on the lower front side of the double-row bracket.

[0011] Preferably, the cutting device comprises a U-shaped plate, the upper front portion of the U-shaped plate is threadedly connected to the outer surface of the bidirectional threaded rod, the lower front portion of the U-shaped plate is slidably connected to the outer surface of a guide rod, the four corners of the end of the U-shaped plate away from the centering adjustment device are all provided with rotating gears and are fixedly connected to a motor 2, the load end of the motor 2 is fixedly connected to one of the gears, the outer surfaces of the four gears are jointly meshed with a notched gear ring, the end of the U-shaped plate away from the centering adjustment device is fixed with an adjustment mechanism 1, the adjustment mechanism 1 is located outside the adjustment mechanism 1 on the same side, the cutting mechanism is fixed to the upper portion of the side of the U-shaped plate close to the centering adjustment device, the upper end of the U-shaped plate is fixed with an L-shaped plate, and the upper end of the horizontal part of the L-shaped plate is fixed with an electric cylinder.

[0012] Preferably, the adjustment mechanism 1 includes an arc-shaped notch guide plate 1, an arc-shaped notch guide plate 2 is rotatably arranged on the side of the arc-shaped notch guide plate close to the U-shaped plate, a connecting plate 1 is fixed to the outer side of the arc-shaped notch guide plate 2, the other end of the connecting plate 1 is fixed to the U-shaped plate on the same side, a handle 2 is fixed to the end of the arc-shaped notch guide plate 1 away from the U-shaped plate, and a notch ring 1 is fixed to the inner rings of the arc-shaped notch guide plate 1 and the arc-shaped notch guide plate 2.

[0013] Preferably, the outer side of the first part and the outer side of the tail part of the arc-shaped notch guide plate are both fixed with limit blocks 1, and the tail part of the arc-shaped notch guide plate 2 is fixed with limit blocks 2 respectively cooperating with the two limit blocks 1.

[0014] Preferably, the cutting mechanism comprises a gap ring three fixed to the inner ring of the gap gear ring, and a guide mechanism is fixed to the outer ring of the gap ring three on a side close to the centering adjustment device;

[0015] Preferably, the guide mechanism is composed of a notched track and a notched ring 2 sliding on the notched track;

[0016] Preferably, two horizontal plates are fixed to one end of the notch ring 2 close to the centering adjustment device, and guide rods 2 are slidably provided on the outer surfaces of the two horizontal plates, and a shell is fixed to the lower ends of the two guide rods 2, and a baffle 1 is fixed to the lower and upper parts of the outer surfaces of the two guide rods 2, the baffle 1 located at the lower part is located at the lower part of the two horizontal plates, and two springs 1 are fixedly connected between a lower end of the baffle located at the upper part and an upper end of the adjusting mechanism 2 on the same side, a motor 3 is fixed to the inner cavity of the shell, a cutting saw is fixedly connected to the load end of the motor 3, and an adjusting mechanism 2 is fixed to the end of the shell away from the centering adjustment device.

[0017] Preferably, the L-shaped plate includes a connecting rod 1 fixed to an end of the shell away from the centering adjustment device, the connecting rod 1 is divided into two sections, a magnetic block is fixed in the middle, and a plurality of guide wheels are movable on the outer surface of the connecting rod 1.

[0018] Preferably, the diameters of the guide wheels increase from the inside to the outside, and the inner ring of each guide wheel is magnetic.

[0019] Preferably, after the arc-shaped notch guide plate 1 and the arc-shaped notch guide plate 2 are opened, there are notches on the upper parts of the two notch rings 1, and the notches allow the guide wheel with the largest diameter to pass through.

[0020] Preferably, the centering adjustment device includes two connecting plates respectively fixed on the left and right sides of the vertical plate two, a notch ring four is fixed at the rear end of the two connecting plates two, a feeder is slidably provided in the middle of the outer surface of the vertical plate two, the two connecting plates two are in the middle of the feeder, guide rods three that penetrate the notch ring four are slidably provided on the top and bottom of the inner surfaces of the two notch rings four, a flat plate one is fixed at one end of the two guide rods three on the same side close to the center of the notch ring four, a roller is rotated at one end of the two flat plates one on the same side close to the center of the notch ring four on the same side, a spring two is fixed between the outer side of the outer surface of the two guide rods three on the same side and the outer surface of the notch ring four on the same side, and measuring rulers are fixed on the upper and lower sides of the notch of the two notch rings four.

[0021] Preferably, the feeder includes four driving rods sliding on the outer surface of the second vertical plate, and the front and rear ends of the four driving rods are commonly fixed with push plates.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, two cutting devices are used to cut the boiler pipe. It is not necessary to dismantle the entire boiler pipe in use. It is only necessary to move the device to the bottom of the boiler pipe to be cut, put the cutting device on the outside of the boiler pipe to be cut, and cut the pipe by the cutting device, which saves time and effort.

[0024] 2. In the present invention, before cutting by the cutting device, the boiler pipe to be cut can be supported by the centering adjustment device in this case to ensure the stability of the boiler pipe during the cutting process and the smoothness of the incision, so as to facilitate the subsequent welding operation after the maintenance is completed.

[0025] 3. In the present invention, the positions of the two cutting devices can be adjusted through the bidirectional threaded rod, motor 1 and guide rod 1, and then the distance between the two cutting devices can be adjusted, and then the cutting length can be adjusted, so that it can be suitable for different blockage lengths, thereby improving the application range of the device.

[0026] 4. In the present invention, by adjusting the second adjusting mechanism, the cutting device can be applied to boiler pipes of various diameters, thereby ensuring the cutting quality and improving the application range of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the present invention;

[0029] Figure 3 For the present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0030] Figure 4 It is a schematic diagram of the overall structure of the cutting device of the present invention;

[0031] Figure 5 It is a schematic diagram of the overall structure of the regulating mechanism of the present invention;

[0032] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of point B in the middle;

[0033] Figure 7 It is a schematic diagram of the overall structure of the cutting mechanism of the present invention;

[0034] Figure 8 It is a schematic diagram of the overall structure of the cutting mechanism of the present invention from another perspective;

[0035] Fig. 9 For the present invention Figure 7 The enlarged schematic diagram at C in the middle;

[0036] Fig.10 For the present invention Figure 4 The enlarged schematic diagram at D in the middle;

[0037] Fig.11 It is a schematic diagram of the overall structure of the measuring ruler of the present invention.

[0038] In the figure: 1. double-row bracket; 2. self-locking universal wheel; 3. vertical plate 1; 4. handle 1; 5. bidirectional threaded rod; 6. centering adjustment device; 61. notch ring 4; 62. guide rod 3; 63. roller; 64. plate 1; 65. spring 2; 66. measuring ruler; 67. feeder; 671. drive rod; 672. push plate; 68. connecting plate 2; 7. cutting device; 71. U-shaped plate; 72. gear; 73. motor 2; 74. notch gear ring; 75. adjustment mechanism 1; 751. arc notch guide plate 1; 752. arc notch guide plate 2; 753. handle 2; 754, limit block one; 755, connecting plate one; 756, notch ring one; 757, limit block two; 76, L-shaped plate; 77, cutting mechanism; 770, horizontal plate; 771, guide mechanism; 772, notch ring three; 773, housing; 774, motor three; 775, cutting saw; 776, adjustment mechanism two; 7761, connecting rod one; 7762, magnetic block; 7763, guide wheel; 777, spring one; 778, guide rod two; 779, baffle one; 78, electric cylinder; 8, motor one; 9, guide rod one; 10, vertical plate two; 11, inclined plate. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0040] Embodiment 1

[0041] like Figure 1 and Figure 2As shown, a pipe cutter for boiler maintenance in a thermal power plant comprises a double-row bracket 1, the bottom four corners of the double-row bracket 1 are all fixed with self-locking universal wheels 2, the bottom wall of the lower row of the double-row bracket 1 is installed with an inclined plate 11, the inner cavity of the vertical part on the left and right sides of the front between the double rows of the double-row bracket 1 is installed with an electric telescopic rod, the upper ends of the two electric telescopic rods are installed with a vertical plate 3, the middle part between the opposite surfaces of the two vertical plates 3 is fixed with a guide rod 9, the upper part between the opposite surfaces of the two vertical plates 3 is rotated together with a bidirectional threaded rod 5, one of the vertical plates 3 is fixed on the side away from the double-row bracket 1 There is a motor 8 fixedly connected to the bidirectional threaded rod 5, and a vertical plate 10 fixed to the front part of the upper end of the double-row bracket 1 is installed in the middle of the outer surface of the motor 8 and the guide rod 9. The vertical plate 10 is rotatably connected to the motor 8, and the motor 8 is fixed in the middle of the vertical plate 10. Two cutting devices 7 are jointly arranged on the outer surfaces of the bidirectional threaded rod 5 and the guide rod 9, and the two cutting devices 7 are symmetrically distributed on the left and right. A centering adjustment device 6 is arranged in the middle of the vertical plate 10, an inclined plate 11 is installed on the bottom wall of the lower row of the double-row bracket 1, and a handle 4 is installed on the lower front side of the double-row bracket 1.

[0042] It is known from the prior art that boiler pipelines need to be erected during the laying process for the following reasons:

[0043] 1. Control pipeline displacement and deformation

[0044] Fixed position: The bracket can ensure that the pipeline is fixed in a specific position to prevent displacement and deformation caused by external forces such as wind, earthquake, etc. or internal pressure. The bracket must be able to withstand the external force of the pipeline and limit the displacement of the pipeline at the fixed bracket position.

[0045] Sliding adjustment: The movable bracket allows the pipeline to expand and contract when the temperature changes, and can be adjusted through sliding to adapt to changes in the length of the pipeline, while ensuring that the pipeline can expand and contract freely without resistance.

[0046] 2. Support the weight of the pipeline

[0047] Evenly distribute the load: The bracket can support the weight of the pipeline and its components and evenly distribute the weight to the ground or building structure to prevent damage caused by excessive local pressure.

[0048] Enhanced structural stability: Especially in large-scale piping systems, the installation of brackets can significantly enhance the structural stability of the entire piping system and ensure its safe operation under various working conditions.

[0049] 3. Adapting to complex environments

[0050] Reduce ground impact: Overhead pipelines can also reduce the impact of ground movement on pipelines and improve the seismic performance of pipelines.

[0051] 4. Easy maintenance and repair

[0052] Maintenance space: The setting of the bracket can provide necessary space for the maintenance and inspection of the pipeline, making it convenient for the staff to carry out daily inspection and repair work.

[0053] Improve safety: By properly setting up the bracket, the safety risks of pipelines during maintenance and repair can be reduced, ensuring the personal safety of workers.

[0054] In the above, the device is pushed to the pipe that needs to be cut, and the pipe is sent to the inside of the centering adjustment device 6 and the two cutting devices 7. The position of the pipe in the inner cavity of the cutting device 7 is adjusted by the centering adjustment device 6 so that the pipe is in the center of the two cutting devices 7. At the same time, the centering adjustment device 6 can also support the pipe during the implementation process, and the support supporting the pipe is used to temporarily support the pipe outside the double-row support 1;

[0055] Start the motor 8, adjust the distance between the two cutting devices 7 through the bidirectional threaded rod 5 and the guide rod 9, then open the two cutting devices 7, and perform annular cutting on the problematic pipe. After the cutting is completed, operate the centering adjustment device 6 to eject the cut part, and drop it onto the inclined plate 11 through the space in the upper row of the double-row bracket 1 and move toward the operator according to the slope of the inclined plate 11, so as to facilitate the removal of the cut pipe.

[0056] Embodiment 2

[0057] This embodiment optimizes the cutting device 7 on the basis of the first embodiment, so that the cutting device 7 can perform rotary cutting on the boiler pipe.

[0058] Specifically, to achieve the above purpose, refer to Figure 4 In this embodiment, the cutting device 7 includes a U-shaped plate 71, the upper front portion of the U-shaped plate 71 is threadedly connected to the outer surface of the bidirectional threaded rod 5, the lower front portion of the U-shaped plate 71 is slidably connected to the outer surface of the guide rod 9, the four corners of the end of the U-shaped plate 71 away from the centering adjustment device 6 are all rotatably provided with gears 72 and are fixedly connected with a motor 2 73, the load end of the motor 2 73 is fixedly connected to one of the gears 72, and the outer surfaces of the four gears 72 are jointly meshed with a notched gear ring 74, an adjustment mechanism 1 75 is fixed to the end of the U-shaped plate 71 away from the centering adjustment device 6, and the adjustment mechanism 1 75 is located on the outside of the adjustment mechanism 1 75 on the same side, a cutting mechanism 77 is fixed to the upper part of the side of the U-shaped plate 71 close to the centering adjustment device 6, an L-shaped plate 76 is fixed to the upper end of the U-shaped plate 71, and an electric cylinder 78 is fixed to the upper end of the horizontal part of the L-shaped plate 76;

[0059] In the above, the two U-shaped plates 71 are clamped on the outside of the boiler pipe, and the centering adjustment device 6 is clamped on the outer surface of the boiler pipe, the electric telescopic rod is turned on, and the two vertical plates 3 are driven to move up and down, thereby adjusting the position of the boiler pipe in the inner cavity of the centering adjustment device 6, so that the center of the boiler pipe and the center of the centering adjustment device 6 are on the same axis. At this time, the adjustment mechanism 1 75 is opened and the cutting mechanism 77 and the two electric cylinders 78 are turned on. The two cutting mechanisms 77 are pressed downward by the two electric cylinders 78 to cut the upper part of the boiler pipe first, and then the cutting mechanism 77 is driven to start rotating under the joint action of the motor 2 73, the gear 72 and the notched gear ring 74 to cut around the boiler pipe.

[0060] Specifically, in order to achieve the above-mentioned guiding of the cutting mechanism 77 during the cutting process by the adjusting mechanism 1 75, refer to Figure 5 and Figure 6 In this case, the adjustment mechanism 1 75 includes an arc-shaped notch guide plate 1 751, and an arc-shaped notch guide plate 2 752 is rotatably arranged on one side of the arc-shaped notch guide plate 1 751 close to the U-shaped plate 71, a connecting plate 1 755 is fixed to the outer side of the arc-shaped notch guide plate 2 752, and the other end of the connecting plate 1 755 is fixed to the U-shaped plate 71 on the same side, a handle 2 753 is fixed to the end of the arc-shaped notch guide plate 1 751 away from the U-shaped plate 71, and a notch ring 1 756 is fixed to the inner rings of the arc-shaped notch guide plate 1 751 and the arc-shaped notch guide plate 2 752;

[0061] When the adjustment mechanism 1 75 is not used, the limit block 1 754 located at the head of the arc-shaped notch guide plate 1 751 is fitted with the connecting plate 1 755 to ensure that the arc-shaped notch guide plate 2 752 is in an open state, so that the boiler pipe can enter the inner cavity of the arc-shaped notch guide plate 2 752;

[0062] When the adjustment mechanism 75 is used, the limit block 754 at the tail of the arc-shaped notch guide plate 751 fits with the connecting plate 755, so that the arc-shaped notch guide plate 752 is in a closed state, and the boiler pipe is enclosed in the cavity formed by the arc-shaped notch guide plate 751 and the arc-shaped notch guide plate 752.

[0063] For further information, see Figure 5 , Figure 6 , Fig. 9 and Fig.10 In this case, the outer sides of the front and rear ends of the arc-shaped notch guide plate 1 751 are fixed with limit blocks 1 754, and the rear end of the arc-shaped notch guide plate 2 752 is fixed with limit blocks 2 757 respectively cooperating with the two limit blocks 1 754;

[0064] After the arc-shaped notch guide plate 1 751 and the arc-shaped notch guide plate 2 752 are opened, there is a notch on the upper part of the two notch rings 1 756, and the notch allows the guide wheel 7763 with the largest diameter to pass through.

[0065] An adjustment mechanism 2 776 is fixed to one end of the housing 773 away from the centering adjustment device 6;

[0066] The L-shaped plate 76 includes a connecting rod 7761 fixed to the end of the housing 773 away from the centering adjustment device 6. The connecting rod 7761 is divided into two sections, the middle of which is fixed with a magnetic block 7762, and the outer surface of the connecting rod 7761 is movable with a plurality of guide wheels 7763.

[0067] The several guide wheels 7763 mentioned above can be selected according to actual needs, and it is only necessary to ensure that the guide wheel 7763 with the largest size can pass through the gap formed by the two gap rings 756.

[0068] The diameters of the guide wheels 7763 increase from the inside to the outside, and the inner ring of each guide wheel 7763 is magnetic.

[0069] The length of each guide wheel 7763 is greater than the width of the two notched rings 756, and both sides of each guide wheel 7763 are equipped with anti-falling circular plates;

[0070] The magnetism on the magnetic block 7762 is opposite to the magnetism of the inner ring of the guide wheel 7763, ensuring its stability during the switching process between the two gap rings 756;

[0071] In addition, when the magnetism of magnetic block 7762 and the inner ring of magnetic block 7762 is weakened, the magnetizer in the prior art can be used to magnetize both of them.

[0072] Specifically, to cut boiler pipes, refer to Figure 8 In this case, the cutting mechanism 77 includes a gap ring 3 772 fixed to the inner ring of the gap gear ring 74, and a guide mechanism 771 is fixed to the outer ring of the gap ring 3 772 near the centering adjustment device 6. The guide mechanism 771 is composed of a gap track and a gap ring 2 sliding on the gap track;

[0073] Two horizontal plates 770 are fixed to one end of the notch ring 2 close to the centering adjustment device 6, and guide rods 2 778 are slidably arranged on the outer surfaces of the two horizontal plates 770, and a shell 773 is fixed to the lower ends of the two guide rods 2 778, and baffles 1 779 are fixed to the lower and upper parts of the outer surfaces of the two guide rods 2 778, the baffle 1 779 located at the lower part is located at the lower part of the two horizontal plates 770, and two springs 1 777 are fixedly connected between the lower end of the baffle 1 779 located at the upper part and the upper end of the adjusting mechanism 2 776 on the same side, and a motor 3 774 is fixed to the inner cavity of the shell 773, and a cutting saw 775 is fixedly connected to the load end of the motor 3 774.

[0074] In the above, after placing the boiler pipe in the middle of the inner cavity of the U-shaped plate 71, the arc-shaped notch guide plate 1 751 is rotated by the handle 2 753 so that the arc-shaped notch guide plate 1 751 covers the other half of the boiler pipe. When the limit block 1 754 at the tail of the arc-shaped notch guide plate 1 751 fits with the limit block 2 757, the arc-shaped notch guide plate 1 751 stops moving, and the arc-shaped notch guide plate 1 751 covers the boiler pipe. At this time, the guide wheel 7763 with a size suitable for the current pipe is moved to the magnetic block 7762, and the magnetic block 7762 adsorbs the guide wheel 7763. Then, under the joint action of the motor 2 73 and the notched gear ring 74, the driving motor 3 774 rotates with the cutting saw 775. When the guide wheel 7763 fits with the notched ring 1 756 on the same side, the notched ring 1 756 gradually squeezes the guide wheel 7763, so that the guide wheel 7763 moves toward the center position of the arc notched guide plate 1 751. Then, under the connection of the connecting rod 1 7761, the driving motor 3 774 and the cutting saw 775 move synchronously toward the center position of the arc notched guide plate 1 751, and then the boiler pipe is cut by the cutting saw 775 to ensure the cutting quality.

[0075] In addition, the cutting saw 775 can rotate half a circle on the outer surface of the boiler pipe, and then reversely start the motor 2 73 to make the motor 3 774 rotate in the opposite direction to cut the other half of the boiler pipe, so that the boiler pipe can be completely cut off;

[0076] Since the arc notch guide plate 1 751 and the arc notch guide plate 2 752 can form a complete circle, the cutting saw 775 can rotate completely around the boiler pipe. However, in order to ensure that the power cable is not dragged during the implementation process, the cutting saw 775 can be allowed to cut in the form of half a circle on the outer circle of the boiler pipe, rotating half a circle clockwise and half a circle counterclockwise to ensure the integrity of the cutting.

[0077] Embodiment 3

[0078] This embodiment ensures the cutting accuracy and the cutting depth of the cutting saw 775 is the same at every location on the basis of the first and second embodiments. In this embodiment, the height of the cutting device 7 can be calibrated before cutting by using the centering adjustment device 6.

[0079] Specifically, in order to achieve the above purpose, see Fig.11In this case, the centering adjustment device 6 includes a connecting plate 2 68 fixed on the left and right sides of the vertical plate 2 10 respectively, and a notch ring 4 61 is fixed at the rear end of the two connecting plates 2 68. A feeder 67 is slidably provided in the middle of the outer surface of the vertical plate 2 10. The two connecting plates 2 68 are both in the middle of the feeder 67. A guide rod 3 62 penetrating the notch ring 4 61 is slidably provided on the top and bottom of the inner surfaces of the two notch rings 4 61. A flat plate 1 64 is fixed to one end of the two guide rods 3 62 on the same side close to the center of the notch ring 4 61. A roller 63 is rotated on one end of the two flat plates 1 64 on the same side close to the center of the notch ring 4 61 on the same side. A spring 2 65 is fixed between the outer side of the outer surface of the two guide rods 3 62 on the same side and the outer surface of the notch ring 4 61 on the same side. A measuring ruler 66 is fixed to the upper and lower sides of the notch of the two notch rings 4 61.

[0080] The feeder 67 includes four driving rods 671 sliding on the outer surface of the vertical plate 10, and the front and rear ends of the four driving rods 671 are commonly fixed with push plates 672.

[0081] In the above, after the device is pushed under the boiler pipe, the pipe is sent into the inner cavity of the notch ring 4 61, and the pipe is placed between the eight rollers 63. The boiler pipe will naturally push the four guide rods 3 62 outwards respectively. At this time, according to the distance that the four guide rods 3 62 move outwards and the horizontal projection reading of the end of the guide rod 3 62 away from the notch ring 4 61 on the same side of the measuring ruler 66, it can be judged whether the boiler pipe is at the center position of the notch ring 4 61 and the U-shaped plate 71. If it is, it does not need to be adjusted, otherwise it is necessary to adjust the position of the notch ring 4 61 and the U-shaped plate 71;

[0082] During the adjustment process, the vertical height positions of the two vertical plates 1 3 are adjusted by two electric telescopic rods, and the final position is determined by cooperating with the projection of the guide rod 3 62 on the measuring ruler 66;

[0083] The final position is that the projection values ​​of the two upper guide rods 62 on the measuring ruler 66 on the same side are equal to the projection values ​​of the two lower guide rods 62 on the measuring ruler 66 on the same side.

[0084] After the final cutting is completed, the push plate 672 on the operator's side is pushed hard, and under the connection of the driving rod 671, the push plate 672 away from the operator pushes the boiler pipe out of the inner cavity of the notch ring 4 61, so that the boiler pipe falls onto the inclined plate 11 and slides out to the operator's side.

[0085] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art 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 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. A pipe cutter for overhauling boilers in thermal power plants, comprising a double-row bracket (1), characterized in that: Self-locking universal wheels (2) are fixed to the four corners of the bottom end of the double-row bracket (1), an inclined plate (11) is installed on the bottom wall of the lower row of the double-row bracket (1), electric telescopic rods are installed in the inner cavity of the vertical parts on both sides of the front of the double-row bracket (1), and a vertical plate (3) is installed on the upper end of the two electric telescopic rods. A guide rod (9) is fixed in the middle between the opposite surfaces of the two vertical plates (3), and a bidirectional threaded rod (5) is rotated together at the upper part between the opposite surfaces of the two vertical plates (3), and a motor (8) fixedly connected to the bidirectional threaded rod (5) is fixed on the side of one of the vertical plates (3) away from the double-row bracket (1). A vertical plate 2 (10) fixed to the front upper end of the double-row bracket (1) is installed in the middle of the outer surface of the motor 1 (8) and the guide rod 1 (9), and the vertical plate 2 (10) is rotatably connected to the motor 1 (8). The motor 1 (8) is fixed in the middle of the vertical plate 2 (10). Two cutting devices (7) are installed on the outer surface of the bidirectional threaded rod (5) and the guide rod 1 (9), and the two cutting devices (7) are symmetrically distributed on the left and right. A centering adjustment device (6) is installed in the middle of the vertical plate 2 (10). The bottom wall of the lower row of the double-row bracket (1) is installed with an inclined plate (11), and the lower front side of the double-row bracket (1) is installed with a handle 1 (4).

2. The pipe cutter for boiler maintenance in a thermal power plant according to claim 1, characterized in that: The cutting device (7) comprises a U-shaped plate (71), the upper front portion of the U-shaped plate (71) is threadedly connected to the outer surface of the bidirectional threaded rod (5), the lower front portion of the U-shaped plate (71) is slidably connected to the outer surface of the guide rod (9), the four corners of the end of the U-shaped plate (71) away from the centering adjustment device (6) are all rotatably provided with gears (72) and are fixedly connected to a second motor (73), the load end of the second motor (73) is fixedly connected to one of the gears (72), and the four gears ( The outer surfaces of the U-shaped plate (72) are meshed with a notched gear ring (74); an adjustment mechanism (75) is fixed to the end of the U-shaped plate (71) away from the centering adjustment device (6); the adjustment mechanism (75) is located on the outside of the adjustment mechanism (75) on the same side; a cutting mechanism (77) is fixed to the upper part of the side of the U-shaped plate (71) close to the centering adjustment device (6); an L-shaped plate (76) is fixed to the upper end of the U-shaped plate (71); and an electric cylinder (78) is fixed to the upper end of the horizontal part of the L-shaped plate (76).

3. A pipe cutter for boiler maintenance in a thermal power plant according to claim 2, characterized in that: The adjustment mechanism 1 (75) comprises an arc-shaped notch guide plate 1 (751), a side of the arc-shaped notch guide plate 1 (751) close to the U-shaped plate (71) is rotatably provided with an arc-shaped notch guide plate 2 (752), a connecting plate 1 (755) is fixed on the outer side of the arc-shaped notch guide plate 2 (752), the other end of the connecting plate 1 (755) is fixed on the U-shaped plate (71) on the same side, a handle 2 (753) is fixed on the end of the arc-shaped notch guide plate 1 (751) away from the U-shaped plate (71), and a notch ring 1 (756) is fixed to the inner rings of the arc-shaped notch guide plate 1 (751) and the arc-shaped notch guide plate 2 (752).

4. A pipe cutter for boiler maintenance in a thermal power plant according to claim 3, characterized in that: The outer sides of the front and rear ends of the arc-shaped notch guide plate 1 (751) are both fixed with limit blocks 1 (754), and the rear end of the arc-shaped notch guide plate 2 (752) is fixed with limit blocks 2 (757) respectively matched with the two limit blocks 1 (754).

5. The pipe cutter for boiler maintenance in a thermal power plant according to claim 2, characterized in that: The cutting mechanism (77) comprises a notch ring three (772) fixed to the inner ring of the notch gear ring (74), and a guide mechanism (771) is fixed to a side of the outer ring of the notch ring three (772) close to the centering adjustment device (6); The guide mechanism (771) is composed of a notch track and a notch ring 2 sliding on the notch track; Two horizontal plates (770) are fixed to one end of the notch ring 2 close to the centering adjustment device (6), and guide rods 2 (778) are slidably mounted on the outer surfaces of the two horizontal plates (770), and a housing (773) is fixed to the lower ends of the two guide rods 2 (778), and baffle plates 1 (779) are fixed to the lower and upper parts of the outer surfaces of the two guide rods 2 (778), and the baffle plates 1 (779) located at the lower part are located at the lower parts of the two horizontal plates (770), and two springs 1 (777) are fixedly connected between the lower end of the baffle plates 1 (779) located at the upper part and the upper end of the second adjustment mechanism (776) on the same side, and a motor 3 (774) is fixed to the inner cavity of the housing (773), and a cutting saw (775) is fixedly connected to the load end of the motor 3 (774), and an adjustment mechanism 2 (776) is fixed to the end of the housing (773) away from the centering adjustment device (6).

6. A pipe cutter for boiler maintenance in a thermal power plant according to claim 5, characterized in that: The L-shaped plate (76) comprises a connecting rod (7761) fixed to one end of the housing (773) away from the centering adjustment device (6); the connecting rod (7761) is divided into two sections, the middle of which is fixed with a magnetic block (7762); and the outer surface of the connecting rod (7761) is provided with a plurality of guide wheels (7763) that can move.

7. A pipe cutter for boiler maintenance in a thermal power plant according to claim 6, characterized in that: The diameters of the guide wheels (7763) increase from the inside to the outside, and the inner ring of each guide wheel (7763) is magnetic.

8. The pipe cutter for boiler maintenance in a thermal power plant according to claim 3, characterized in that: After the arc-shaped notch guide plate 1 (751) and the arc-shaped notch guide plate 2 (752) are opened, a notch is formed on the upper part of the two notch rings 1 (756), and the notch allows the guide wheel (7763) with the largest diameter to pass through.

9. The pipe cutter for boiler maintenance in a thermal power plant according to claim 1, characterized in that: The centering adjustment device (6) comprises a connecting plate 2 (68) respectively fixed on the left and right sides of the vertical plate 2 (10), and a notch ring 4 (61) is fixed at the rear end of the two connecting plates 2 (68). A feeder (67) is slidably provided in the middle of the outer surface of the vertical plate 2 (10). The two connecting plates 2 (68) are both in the middle of the feeder (67), and guide rods 3 (62) penetrating the notch ring 4 (61) are slidably provided at the top and bottom of the inner surfaces of the two notch rings 4 (61). A flat plate (64) is fixed to one end of the two guide rods (62) on the same side close to the center of the notch ring (61); a roller (63) is rotatably mounted to one end of the two flat plates (64) on the same side close to the center of the notch ring (61) on the same side; a spring (65) is fixed between the outer sides of the outer surfaces of the two guide rods (62) on the same side and the outer surface of the notch ring (61) on the same side; and measuring rulers (66) are fixed to the upper and lower sides of the notches of the two notch rings (61).

10. A pipe cutter for boiler maintenance in a thermal power plant according to claim 9, characterized in that: The feeder (67) comprises four driving rods (671) sliding on the outer surface of the second vertical plate (10), and the front and rear ends of the four driving rods (671) are commonly fixed with a push plate (672).

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