Scribing method for contour line of supporting pier

Abstract

A marking method for a contour line of a supporting pier comprises the steps that a datum point A and a datum point B of two center lines are determined in a dock, a total station is used for establishing a three-dimensional coordinate system with the datum point A and the datum point B as the datum, marking points are made between the datum point A and the datum point B to serve as the marking datum of a chalk line, and the marking points are connected through the chalk line to form the center line of the dock; taking B as a reference point and a 0 # rib position, determining a plurality of rib position points on the center line of the dock, placing a total station between two adjacent rib position points, placing a light target near a value s away from the center line of the dock, finely adjusting the position of the light target, finally enabling the Y value of the coordinate of the light target to be equal to the value s, marking the position of the light target, and marking the position of the light target under the condition of keeping the Y value of the light target unchanged. The light target is moved in the length direction of the dock through a hand-push type ruling machine, and a point is determined every time the light target is moved by 10 m for marking. According to the method, the use frequency and dependence of the total station are reduced, the step of determining the positioning point is simplified, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ship design and construction, and in particular relates to a method for marking a supporting pier contour line. Background Art

[0002] Support piers play a supporting role for ships. In the process of shipbuilding and ship repair, whenever a ship is docked for construction, it is necessary to place the support piers in advance. Before placing the support piers, it is necessary to draw the outlines of their locations. Each ship requires approximately 1,200 support piers to provide support, so 1,200 outlines must be drawn before each ship enters the dock to provide a benchmark for the subsequent placement of the support piers.

[0003] The outlines of the 1,200 supporting piers required for a single ship need to be drawn. The traditional process of marking outlines is cumbersome, the instruments and tools used are complex, the number of supporting piers is large, and the marking process generates a large amount of repetitive work, which consumes a lot of manpower and time costs, affects the shipbuilding dock period, and seriously affects the economic benefits of the group. How to provide a marking method and marking device that can quickly locate, automatically mark and spray, and perform repeatable and continuous operations has become the research object of this new use. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a method for marking the outline of a supporting pier, aiming to reduce a large number of repeated operations generated in the marking process and save labor and time costs. The technical solution adopted is: A method for marking the outline of a supporting pier, the specific steps are: S1: It is necessary to determine two centerline reference points A and B in the dock. Reference point A is located at the bow of the dock, and reference point B is located at the back of the dock. Use a total station to establish a three-dimensional coordinate system based on reference points A and B. Make marking points between reference points A and B as the chalk line marking reference. Use chalk line to connect the marking points to form the dock centerline.

[0005] S2: With B as the reference point and as the 0# rib position, a plurality of rib positions are determined on the dock centerline using a ruler, and the plurality of rib positions are set at equal intervals.

[0006] S3: For the supporting piers regularly distributed along the length of the dock, place the total station between two adjacent rib sites, place the light target near the distance s from the center line of the dock, and fine-tune the position of the light target until the Y value of the light target coordinate is equal to the s value. Mark the position of the light target, and move the light target along the length of the dock while keeping the Y value of the light target unchanged. Determine a point every 10m and mark it. Then use chalk lines to connect these points to form the center line of the supporting pier with a distance s from the center line of the dock.

[0007] S4: Repeat the operation of step S3 repeatedly to determine the center lines of all supporting piers with different distances from the center line of the dock in the length direction of the dock; take a rib point E of the center line of the supporting pier as the starting point, determine the specific center point position of the supporting pier on the center line of the supporting pier, and mark it.

[0008] S5: For supporting piers whose center points are regularly distributed along the width of the dock, place the total station between two adjacent rib position points, and place the light target at point G, that is, near the x value of m and the y value of k. By fine-tuning the position of the light target, the light target coordinates are finally made to have an x ​​value of m and a y value of k. Mark them, and while keeping the x value of the light target unchanged, move the light target along the width of the dock. Determine a point every 10m and mark it. Then use chalk lines to connect these points to form the center line of the supporting pier with a rib position value of m.

[0009] S6: Repeat the operation of step S5 repeatedly to determine the center lines of all supporting piers with different distances from the center line of the dock in the width direction of the dock; take a rib point F of the center line of the supporting pier as the starting point, determine the specific center point position of the supporting pier on the center line of the supporting pier, and mark it.

[0010] S7: For support piers with irregular distribution, a coordinate system can be established by using a total station to select the nearest rib site on the center line of the dock according to the coordinate position of the support pier. The light target can be placed at the approximate position of the center point of the support pier. The light target can be continuously moved and its position can be measured. When the coordinates of the light target position and the center point of the support pier are the same, the position of the light target is marked as the center point of the support pier.

[0011] S8: Push the hand-push marking machine to position it based on the center of the supporting pier, and use the automatic spraying device of the hand-push marking machine to mark the outline of each supporting pier.

[0012] S9: Position the hand-push marking machine to the center point of the support pier determined in the above steps, and ensure that the square frame at the bottom of the hand-push marking machine is horizontal and vertical, so as to complete the positioning of the push-type marking machine. After the device is positioned, the device is started through the solenoid valve, and the air pump takes the paint from the paint bucket and transmits it to the atomizer through the upward pipeline to atomize the paint. The atomizer compresses the air and mixes the high-pressure gas with the paint, and transmits the paint to the nozzles at the four corners of the square frame through the delivery pipeline. The direction of the nozzle is adjusted through the bamboo universal tube, and the paint is sprayed out in conjunction with the square frame to complete the marking of the contour line of the support pier.

[0013] S10: Repeat steps S1 to S9 to complete the marking work of other supporting piers.

[0014] The above-mentioned method for marking the contour line of the supporting pier further uses a 50M ruler to find the center reference point A in the width direction of the dock at a distance of 30m from the bow wall of the dock, and finds the center reference point B in the width direction of the dock at a distance of 30m from the stern wall of the dock.

[0015] The above-mentioned method for marking the contour line of the supporting pier, further, in step S2, taking B as the reference point, as the 0# rib position, on the center line of the dock, a 50M ruler is used to determine the -30#, 0#, 30#, 60#, 90#, 120#, 150#, 180#, 210#, 240#, 270#, and 300# rib positions, and the distance between two adjacent rib positions is 30m.

[0016] The above-mentioned method for marking the contour line of a supporting pier, further, a hand-push marking machine includes a bottom square frame, a cross brace is arranged at the center of the frame, a connecting pipe is fixed at the center of the cross brace, the connecting pipe extends upward to one-half and begins to bend, a handle is fixed at the free end of the connecting pipe, sliding rods are arranged on both sides of the connecting pipe, four universal wheels are located inside the frame, connected by a bottom plate, the center of the bottom plate passes through the connecting pipe and the sliding rod, the sliding rod is equipped with a fixing cap, the bottom plate is located above the cross brace, a spring is arranged between the bottom plate and the cross brace, and the fixing cap is tightened to fix the bottom plate.

[0017] A laser level is fixed at the center of the lower surface of the cross brace, and a paint bucket is placed on the cross brace. The paint bucket is connected to the upward pipeline. An operation panel is fixed to the free end of the connecting pipe. Two delivery pipes are connected to the bottom of the upward pipeline. Nozzles are fixed at the ends of the delivery pipes. An air pump, a solenoid valve and an atomizer are arranged on the operation panel. The air pump draws the paint in the paint bucket through the upward pipeline and transfers it to the atomizer for atomization. The atomized paint forms a spray and is sprayed out through the nozzle.

[0018] The control panel is provided with a transformer, an air pump, a solenoid valve and an atomizer. The air pump transmits the paint in the paint bucket to the atomizer through a pipeline. The atomizer can atomize the paint, mix the paint with high-pressure gas, and transmit the high-temperature and high-pressure gas downward through the pipeline. The pipeline of the device is mainly laid along the connecting pipe, the bottom plate and the square frame. The paint pipeline can be divided into an upward and downward part according to the direction of the paint. The upper end of the paint upward pipeline is connected to the air pump, and the lower end is connected to the paint bucket. In the paint delivery pipeline, the upper end of the pipeline is connected to the atomizer. The pipeline is distributed along the connecting pipe. The direction of the paint is changed by a tee at the end of the connecting pipe, so that the paint is distributed from the intersection of the connecting pipe and the bottom plate to the two ends of the bottom plate. Tees are respectively installed at both ends of the bottom plate to change the direction of the paint again, so that the paint is distributed from the end of the bottom plate to the four corners of the square frame. A bamboo universal tube is connected to the end of the downward paint pipeline, and a nozzle is installed at the end of the bamboo universal tube. The bamboo universal tube plays a role in adjusting the spraying direction, and the nozzle plays a role in spraying paint.

[0019] The above-mentioned method for marking the contour line of a supporting pier further comprises two conveying pipes symmetrically fixed on the frame plate of the direction frame, bamboo joint universal heads are arranged at both ends of the conveying pipes, and the nozzles are fixed on the ends of the bamboo joint universal pipes.

[0020] The above-mentioned method for marking the contour line of a supporting pier further comprises: an external thread is provided at the bottom of the connecting pipe, a rotating pipe is sleeved on the external thread of the connecting pipe and cooperates with the external thread, and the rotating pipe is located above the bottom plate and pressed on the bottom plate.

[0021] In the above-mentioned method for marking the outline of a supporting pier, further, a sliding bearing is arranged in the hole connecting the bottom plate and the sliding rod, and the sliding bearing is sleeved on the sliding rod.

[0022] In the above method for marking the outline of a supporting pier, further, the size of the frame is the same as the size of the outline of the supporting pier.

[0023] In the above-mentioned method for marking the contour line of a supporting pier, further, the bottom plate is in an I-shape, and four pulleys are respectively arranged at the four corners of the bottom plate.

[0024] In the above-mentioned method for marking the contour line of a supporting pier, further, a transformer is also arranged on the operation panel, and the transformer provides voltage for the air pump, the atomizer and the solenoid valve.

[0025] The beneficial effects of the present invention are: 1. The method of the present invention reduces the number of times the total station is used, reduces the dependence on the total station, and effectively solves the contradiction between the low number of instruments held and the large number of personnel; 2. The center point of the support pier contour line in the present invention is determined by using a tape measure instead of a total station, which simplifies the steps of determining the positioning point and improves work efficiency; 3. The application of the hand-push marking machine in the present invention can completely replace the steps of measuring with a tape measure, marking with a chalk line, leaving paint marks, etc. in the process of marking the contour line of the supporting pier, thereby realizing one-key operation, effectively improving the work efficiency of marking the center point of the contour line of the supporting pier, and producing a qualitative improvement in the work efficiency of marking the contour line of the supporting pier.

[0026] 4. The time for drawing the outline of the supporting pier is greatly shortened, and the time used by the dock to build ships is increased, which effectively improves the effective utilization rate of the dock, thus bringing immeasurable economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The supporting piers have the same Y value as the center point coordinate value of the supporting pier outline; Figure 2 The supporting piers have the same X value as the center point coordinate value of the supporting pier outline; Figure 3 This is a schematic diagram of total station measurement; Figure 4 It is a schematic diagram of the working of the device; Figure 5 is a schematic diagram of the device structure; Figure 6 It is the layout diagram of the piping and equipment of the device; Among them, 1-square frame, 2-bottom plate, 4-upward pipeline, 11-handle, 12-operation panel, 13-connecting pipe, 15-cross brace, 16-slide rod, 17-rotating pipe, 19-spring, 20-fixed cap, 22-universal wheel, 31-transformer, 32-air pump, 33-solenoid valve, 34-atomizer, 35-paint bucket, 36-bamboo universal pipe, 37-sprinkler, 43-transmission pipe, A-dock centerline bow reference point, B-dock centerline stern reference point, C-dock centerline upper rib position, D-dock centerline rib position, E-three-dimensional coordinate Y value same straight line length direction reference point, F-three-dimensional coordinate X value same straight line width direction reference point, GX value same end support pier center point; A, B, C, and D can all be used as reference points for the total station to establish a three-dimensional coordinate system; Point E is the measurement reference point for the center point of the support pier with the same Y value determined by the tape measure; Point F is the measurement reference point for the center point of the supporting pier with the same X value determined by the tape measure. DETAILED DESCRIPTION

[0028] The present invention will be further described in conjunction with the accompanying drawings.

[0029] A method for marking the contour line of a supporting pier is provided. The center line of a dock is determined in the dock, and the rib position is determined on the center line in combination with the design drawings. A three-dimensional coordinate system is established using a total station based on the rib position, and the straight lines where the center points of the supporting piers distributed along the width direction and along the length direction of the dock are located are marked. For irregularly distributed supporting piers, the center points of the supporting piers are determined using a total station, and a hand-propelled marking machine is used to mark the contour line of the supporting pier based on the center points of the supporting piers.

[0030] S1: Figure 1 As shown, use a 50M ruler to find point A, the center of the dock width, 30m away from the bow wall. Use the same method to find point B, the center of the dock width, 30m away from the stern wall.

[0031] S2: Place light targets at point A and point B respectively, set up the total station between the two points, use the total station to measure the light targets at points A and B respectively, and establish a coordinate system XOY, where OX is the length direction of the dock and OY is the width direction of the dock.

[0032] S3: Take A as the starting point, use the total station to determine a point every 10m in the AB direction, mark it, and then connect these points with chalk lines. Draw a solid line connecting points A and B on the dock ground as the dock centerline.

[0033] S4: Take B as the reference point and as the 0# rib position, on the dock centerline, use a 50M ruler to determine the -30#, 0#, 30#, 60#, 90#, 120#, 150#, 180#, 210#, 240#, 270#, and 300# rib position points.

[0034] S5: For the supporting piers whose center points are regularly distributed along the length direction of the dock, take the determination of the center line of the supporting piers within the range of 30# and 60#, whose distance from the center line of the dock is s as an example, first set up the total station between 30# and 60#, use 30# as the first point and 60# as the second point to establish a coordinate system using the total station, place the light target near the distance s from the center line of the dock, fine-tune the position of the light target, and finally make the Y value of the light target coordinate equal to the s value, mark the position of the light target, and move the light target along the length direction of the dock while keeping the Y value of the light target unchanged, determine a point every 10m, mark it, and then use chalk lines to connect these points to form the center line of the supporting pier with a distance s from the center line of the dock.

[0035] S6: Repeat S5 to determine the centerline of the supporting pier with different distances from the centerline of the dock, such as Figure 1 shown.

[0036] S7: Use a 50M ruler, take a rib point E on the center line of the supporting pier as the starting point, refer to the pier laying map, determine the specific center point position of the supporting pier on the center line of the supporting pier, and mark it.

[0037] S8: For the supporting piers whose center points are regularly distributed along the width of the dock, take the center line of the supporting pier with rib position number m within the range of 30# and 60# as an example, set up the total station between 30# and 60#, use 30# as the first point and 60# as the second point to establish a coordinate system, place the light target near point G (x value is m, y value is k), and fine-tune the position of the light target to eventually make the x value of the light target coordinate m and the y value k, mark it, and move the light target along the width of the dock while keeping the X value of the light target unchanged. Determine a point every 10m and mark it, then use chalk lines to connect these points to form the center line of the supporting pier with rib position value m.

[0038] S9: Repeat S8 continuously to determine the center line of the supporting pier with different rib position values.

[0039] S10: Use a 50M ruler, take point F (the intersection of the centerline of the support pier and the centerline of the dock) as the starting point, refer to the pier laying diagram, determine the center points of each support pier in the width direction of the dock, and mark them. Figure 2 shown.

[0040] S11: For support piers with irregular distribution, a coordinate system can be established by using a total station to select the nearest rib site on the center line of the dock according to the coordinate position of the support pier. The light target can be placed at the approximate position of the center point of the support pier. The light target can be continuously moved and its position can be measured. When the coordinates of the light target position and the center point of the support pier are the same, the position of the light target is marked as the position of the center point of the support pier.

[0041] The marking device includes a bottom square frame, a horizontal brace is arranged at the center of the frame, a connecting pipe is fixed at the center of the horizontal brace, the connecting pipe extends upward to the halfway point and starts to bend, a handle is fixed at the free end of the connecting pipe, sliding rods are arranged on both sides of the connecting pipe, four universal wheels are located inside the frame, connected by a bottom plate, the bottom plate is in an I-shape, and four pulleys are arranged at the four corners of the bottom plate. The center of the bottom plate passes through the connecting pipe and the sliding rod, the sliding rod is equipped with a fixing cap, the bottom plate is located above the horizontal brace, a spring is arranged between the bottom plate and the horizontal brace, the fixing cap is tightened to fix the bottom plate, a sliding bearing is arranged in the hole connecting the bottom plate and the sliding rod, and the sliding bearing is sleeved on the sliding rod. An external thread is arranged at the bottom of the connecting pipe, and a rotating pipe is sleeved on the external thread of the connecting pipe and matched with the external thread. The rotating pipe is located above the bottom plate and pressed on the bottom plate.

[0042] A laser level is fixed at the center of the lower surface of the cross brace. The paint bucket is placed on the cross brace. The paint bucket is connected to the upward pipeline. An operation panel is fixed at the free end of the connecting pipe. Two delivery pipes are connected to the bottom of the upward pipeline. The two delivery pipes are symmetrically fixed on the frame plate of the direction frame. Bamboo universal heads are set at both ends of the delivery pipes. The nozzle is fixed at the end of the bamboo universal pipe. An air pump, a solenoid valve and an atomizer are set on the operation panel. The air pump draws the paint in the paint bucket through the upward pipeline and transfers it to the atomizer for atomization. The atomized paint forms a spray and is sprayed out through the nozzle.

[0043] According to the direction of the paint, the paint pipeline can be divided into an upward and downward part, wherein the upper end of the upward pipeline is connected to the air pump, and the lower end is connected to the paint bucket. In the paint delivery pipeline, the upper end of the delivery pipeline is connected to the atomizer, and the pipeline is distributed along the connecting pipe. A tee is used to change the direction of the paint at the end of the connecting pipe, so that the paint is distributed from the intersection of the connecting pipe and the bottom plate to the two ends of the bottom plate. Tees are installed at both ends of the bottom plate to change the direction of the paint again, so that the paint is distributed from the end of the bottom plate to the four corners of the square frame. A bamboo universal tube is connected to the end of the downward paint pipeline, and a nozzle is installed at the end of the bamboo universal tube. The bamboo universal tube plays a role in adjusting the spraying direction, and the nozzle plays a role in spraying paint.

[0044] S12: Push the hand-push marking machine to the vicinity of the center point of the supporting pier determined in the above steps, and use the laser level to position it. After the device is positioned, start the device through the solenoid valve, and the air pump takes the paint out of the paint bucket, and transmits it to the atomizer through the upward pipeline to atomize the paint. The atomizer compresses the air and mixes the high-pressure gas with the paint, and transmits the paint to the nozzles at the four corners of the square frame through the transmission pipeline. The direction of the nozzle is adjusted by the bamboo universal tube, and the paint is sprayed out in conjunction with the square frame to complete the marking of the contour line of the supporting pier. For the marking of the contour lines of other supporting piers, it is only necessary to position the hand-push marking machine according to the position of the center point of the supporting pier to complete the one-time marking work. The use of this device can avoid the step of marking the contour line and can directly carry out the contour line marking work, which effectively improves the work efficiency, improves the effective utilization rate of the dock, solves the problem of repeated work, and greatly reduces the labor cost.

Claims

1. A method for marking the contour line of a supporting pier, characterized in that: The specific steps are: S1: Two centerline reference points A and B need to be determined in the dock. Reference point A is located at the bow of the dock, and reference point B is located at the back of the dock. Use a total station to establish a three-dimensional coordinate system based on reference points A and B. Make a mark point between reference points A and B as a chalk line mark reference. Use a chalk line to connect the mark points to form the dock centerline. S2: Take B as the reference point and the 0# rib position. Use a ruler to determine multiple rib positions on the dock centerline. The multiple rib positions are set at equal intervals. S3: For the supporting piers that are regularly distributed along the length of the dock, place the total station between two adjacent rib sites, place the light target near the distance s from the center line of the dock, and fine-tune the position of the light target until the Y value of the light target coordinate is equal to the s value. Mark the position of the light target, and move the light target along the length of the dock while keeping the Y value of the light target unchanged. Determine a point every 10m and mark it. Then use the chalk line to connect these points to form the center line of the supporting pier with a distance s from the center line of the dock. S4: Repeat the operation of step S3 to determine the center lines of all supporting piers with different distances from the center line of the dock in the length direction of the dock; take a rib point E of the center line of the supporting pier as the starting point, determine the specific center point position of the supporting pier on the center line of the supporting pier, and mark it; S5: For the supporting piers whose center points are regularly distributed along the width of the dock, place the total station between two adjacent rib positions, and place the optical target at point G, that is, near the x value of m and the y value of k. Fine-tune the position of the optical target until the x value of the optical target coordinates is m and the y value is k. Mark it. Keep the x value of the optical target unchanged and move it along the width of the dock. Determine a point every 10m and mark it. Then connect these points with a chalk line to form the center line of the supporting pier with a rib position value of m. S6: Repeat the operation of step S5 repeatedly to determine the center lines of all supporting piers with different distances from the center line of the dock in the width direction of the dock; take a rib point F of the center line of the supporting pier as the starting point, determine the specific center point position of the supporting pier on the center line of the supporting pier, and mark it; S7: For support piers with irregular distribution, a coordinate system can be established by selecting a rib point on the center line of the dock using a total station according to the coordinate position of the support pier, placing the light target at the approximate position of the center point of the support pier, continuously moving the light target and measuring the position of the light target. When the coordinates of the light target position and the center point of the support pier are the same, mark the position of the light target as the position of the center point of the support pier; S8: Push the hand-push marking machine to position the support pier center as a reference, and mark the contour of each support pier through the automatic spraying device of the hand-push marking machine; S9: Position the hand-push marking machine to the center point of the support pier determined in the above steps, and ensure that the square frame at the bottom of the hand-push marking machine is horizontal and vertical, so as to complete the positioning of the push-type marking machine. After the device is positioned, the device is started through the solenoid valve (33), and the air pump (32) takes the paint from the paint bucket (35), and transmits it to the atomizer (34) through the upward pipeline to atomize the paint. The atomizer (34) compresses the air and mixes the high-pressure gas with the paint. The paint is transmitted to the nozzles (37) at the four corners of the square frame (1) through the transmission pipeline. The direction of the nozzle is adjusted through the bamboo universal tube (36), and the paint is sprayed out in coordination with the square frame (1), so as to complete the marking work of the support pier contour line; S10: Repeat steps S1 to S9 to complete the marking work of other supporting piers.

2. A method for marking the contour of a support pier according to claim 1, characterized in that: At a distance of 30m from the bow wall of the dock, use a 50M ruler to find the center reference point A in the width direction of the dock, and at a distance of 30m from the stern wall of the dock, find the center reference point B in the width direction of the dock.

3. A method for marking the contour of a support pier according to claim 1, characterized in that: In step S2, taking B as the reference point and the 0# rib position, a 50M ruler is used to determine the -30#, 0#, 30#, 60#, 90#, 120#, 150#, 180#, 210#, 240#, 270#, and 300# rib positions on the center line of the dock, and the spacing between two adjacent rib positions is 30m.

4. A method for marking the outline of a supporting pier according to claim 1, characterized in that: The marking tool comprises a bottom square frame (1), a cross brace (15) is arranged at the center of the frame, a connecting pipe (13) is fixed at the center of the cross brace, the connecting pipe extends upward to the halfway point and starts to bend, a handle (11) is fixed at the free end of the connecting pipe, sliding rods (16) are arranged on both sides of the connecting pipe, four universal wheels (22) are located inside the frame and connected through a bottom plate (2), the center of the bottom plate passes through the connecting pipe and the sliding rod, the sliding rod is matched with a fixing cap (20), the bottom plate is located above the cross brace, a spring (19) is arranged between the bottom plate and the cross brace, and the fixing cap is tightened to fix the bottom plate; A laser level is fixed at the center of the lower surface of the cross brace. A paint bucket (35) is placed on the cross brace. The paint bucket is connected to the upward pipeline (4). An operation panel (12) is fixed at the free end of the connecting pipe. Two delivery pipes (43) are connected to the bottom of the upward pipeline. A nozzle (37) is fixed at the end of the delivery pipe. An air pump (32), a solenoid valve (33) and an atomizer (34) are arranged on the operation panel. The air pump draws paint from the paint bucket through the upward pipeline and transfers it to the atomizer for atomization. The atomized paint forms a spray and is sprayed out through the nozzle.

5. A method for marking the contour of a support pier according to claim 4, characterized in that: Two delivery pipes are symmetrically fixed on the frame plate of the direction frame, bamboo joint universal heads are arranged at both ends of the delivery pipes, and the spray heads are fixed on the ends of the bamboo joint universal pipes (36).

6. A method for marking the outline of a supporting pier according to claim 4, characterized in that: The bottom of the connecting pipe is provided with an external thread, and the rotating pipe (17) is sleeved on the external thread of the connecting pipe and matched with the external thread. The rotating pipe is located above the bottom plate and pressed on the bottom plate.

7. A method for marking the contour of a support pier according to claim 4, characterized in that: A sliding bearing is arranged in a hole where the bottom plate is connected to the sliding rod, and the sliding bearing is sleeved on the sliding rod.

8. A method for marking the outline of a supporting pier according to claim 4, characterized in that: The dimensions of the frame shall be the same as the supporting pier outline dimensions.

9. A method for marking the outline of a supporting pier according to claim 4, characterized in that: The bottom plate is in an I-shape, and four pulleys are respectively arranged at the four corners of the bottom plate.

10. A method for marking the outline of a supporting pier according to claim 4, characterized in that: A transformer (31) is also provided on the operation panel, and the transformer provides voltage for the air pump, the atomizer, and the solenoid valve.

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