In-well step mounting hole positioning method

Abstract

The invention discloses an in-well step mounting hole positioning method in the technical field of inspection well construction, according to the method, a step mounting hole is punched and positioned through a positioning auxiliary device, the diameter of the outer arc surface of a cross rod is the same as that of a well wall, so that the cross rod can be tightly attached to the well wall, and a positioning plate is slidably mounted on the cross rod; the positioning holes are formed in the surfaces of the positioning plates, the outer arc surfaces of the transverse rods are used for simulating the well wall to adjust the positions of the positioning plates, then the whole frame is placed in a well, and after the outer arc surfaces of the transverse rods are attached to the well wall, the positions of the positioning holes are the positions where step mounting holes need to be formed. Through the method, the final forming position of the step mounting hole in the well wall is more accurate, the acceptance qualification rate of the step is increased, meanwhile, the traditional tedious steps of line drawing and dotting are omitted, the mounting process is shortened, the overall working efficiency is improved, meanwhile, the overhead working time of operators is shortened, and the operation risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of inspection well construction, in particular to a method for positioning a step installation hole in a well. Background Art

[0002] In the urban drainage system, inspection wells are an indispensable part, which are used to inspect, clean and repair drainage pipes. Steps are important auxiliary facilities for inspection wells, which are used for staff to enter and exit the inspection wells for daily maintenance and inspection work.

[0003] The step installation process generally involves waiting for the concrete of the inspection well to be formed, measuring, drawing lines, marking points and finally drilling holes on the surface of the inspection well wall. The process is too complicated, and the operators need to perform the above steps in the inspection well, which involves the risk of working at height. At the same time, the ink cartridge wire drawing method is currently mostly used for drawing lines, which has low precision and can easily make the final marking positioning inaccurate, resulting in the final step installation failing to meet the acceptance standards, requiring rework to cause secondary damage to the well body, resulting in economic losses to the project due to wellbore quality problems.

[0004] Based on this, the present invention designs a method for positioning step installation holes in a well to solve the above problems. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a method for positioning step installation holes in a well, using a positioning auxiliary device to position the step installation holes that need to be opened on the well wall, the positioning auxiliary device comprising a frame, a positioning unit and a mounting unit;

[0006] The frame includes two vertical bars parallel to each other, a mounting bar installed between the two vertical bars, and a plurality of cross bars installed between the two vertical bars, the plurality of cross bars and the mounting bar are parallel to each other, the projections of the mounting bar and the cross bar in the vertical direction are arc-shaped, and the arc outer diameters of the mounting bar and the cross bar match the diameter of the well wall, so that the mounting bar and the cross bar can both fit the well wall through the outer arc surface;

[0007] The positioning unit includes a plurality of positioning plates and positioning holes formed on the surfaces of the positioning plates, wherein the plurality of positioning plates are evenly distributed on a plurality of cross bars and are slidably matched with the cross bars;

[0008] The installation unit comprises a plurality of suspension rods which are slidably arranged on the installation rods, and the projections of the suspension rods in the vertical direction have portions which exceed the outer arc surface of the crossbar;

[0009] The method for installing and positioning the step in the well comprises the following steps:

[0010] S100, obtaining the distance between two supporting legs of the step to be installed, adjusting the position of the positioning plate on the crossbar on the ground according to the obtained data, and adjusting the hanging rod according to the position of the positioning plate;

[0011] S200, the vertical rod and the horizontal rod are suspended in the well by making the hanging rod contact with the well top surface, and the outer arc surface of the horizontal rod is attached to the well wall;

[0012] At S300, the operator passes the drill bit of the drilling equipment through the positioning hole and then drills a hole into the well wall.

[0013] As a further solution of the present invention, the shape and size of the cross section of the hanging rod are the same as the shape and size of the cross section of the step to be installed, so that the hanging rod can be inserted into the step installation hole;

[0014] In step S300, if all the step installation holes that need to be opened in the well wall have been opened, the drilling is finished; if there are still step installation holes that need to be opened in the well wall, step S400 is performed;

[0015] S400, move the frame toward the center of the well so that the hanging rod is out of contact with the current contact surface, then insert the hanging rod into the lowest row of step mounting holes to reduce the height of the frame in the well, and then repeat step S300.

[0016] As a further solution of the present invention, in step S300, after the step installation hole is opened in the well wall, the opened step installation hole needs to be cleaned, and a grouting auxiliary device is hung on the vertical rod by a hanging rope. The grouting auxiliary device includes a handle and a grouting pipe fixed at one end of the handle, and the diameter of the grouting pipe is smaller than the diameter of the step installation hole.

[0017] As a further solution of the present invention, the positioning plates on the cross bar form a group of two, and the two positioning plates in the same group of positioning plates are parallel to each other.

[0018] As a further solution of the present invention, the cross section of the vertical rod is rectangular, and the opposite sides of the two vertical rods are inner sides; the cross rod is installed on any side of the vertical rod except the inner side; the mounting rod is installed on any side of the vertical rod except the inner side.

[0019] As a further solution of the present invention, the vertical rod includes a first section and a second section passing through the inner cavity of the first section, the two ends of the cross rod are respectively fixed to the first sections of the two vertical rods, and the two ends of the mounting rod are respectively fixed to the second sections of the two vertical rods.

[0020] As a further solution of the present invention, the top surfaces of the cross bar and the mounting rod are provided with sliding grooves extending to the bottom surfaces, and the sliding grooves are penetrated by sliding rods that slide with the sliding grooves. The first and second clamping blocks with adjustable spacing are installed at both ends of the sliding rods, and the projections of the first and second clamping blocks in the vertical direction both extend beyond the sliding grooves. The first and second clamping blocks are clamped on the upper and lower ends of the cross bar or the mounting rod to fix the position of the sliding rod.

[0021] As a further solution of the present invention, the second clamping block is sleeved on the sliding rod and is prevented from detaching from the sliding rod by an adjustment handle at one end of the sliding rod, and the first clamping block is threadedly engaged with an end of the sliding rod away from the adjustment handle; the positioning plate is fixedly arranged on the first clamping block on the cross bar.

[0022] As a further solution of the present invention, a baffle is fixedly provided on the first clamping block and is used to tightly fit the side of the cross bar or the mounting rod to prevent the first clamping block from rotating; the baffle on the mounting rod fits the outer arc surface of the mounting rod; and the hanging rod is fixedly mounted on the surface of the baffle on the mounting rod.

[0023] As a further solution of the present invention, the cross bar, the mounting bar and the vertical bar are all hollow tubes.

[0024] The present invention has the following beneficial effects:

[0025] The method uses a positioning auxiliary device to drill and locate the step installation holes. The frame in the positioning auxiliary device is used to simulate the shape of the well wall. The cross bar in the frame is arc-shaped, and the diameter of the outer arc surface of the cross bar is the same as the diameter of the well wall. In this way, the cross bar can be tightly attached to the well wall. A positioning plate is slidably installed on the cross bar, and a positioning hole is opened on the surface of the positioning plate. Then, during the construction process, the positioning plate on the cross bar can be adjusted into place on the ground in advance, and the outer arc surface of the cross bar is used to simulate the well wall to adjust the position of the positioning plate. Subsequently, the frame is placed in the well as a whole and the outer arc surface of the cross bar is fitted with the well wall. The position of the positioning hole is the position where the step installation hole needs to be opened. The above method makes the final opening position of the step installation hole in the well wall more accurate, increases the acceptance rate of the step, and at the same time eliminates the traditional cumbersome steps of drawing lines and marking points, shortens the installation process, improves the overall work efficiency, and also reduces the time of high-altitude operations for operators and reduces the operation risks.

[0026] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 It is a flow chart of the method for installing and positioning the step in the well in the present invention;

[0029] Figure 2 It is a schematic diagram of the overall structure of the positioning auxiliary device in the present invention;

[0030] Figure 3 It is a schematic diagram of the installation structure of the positioning plate in the positioning auxiliary device;

[0031] Figure 4 is a schematic diagram of a second exemplary structure of a positioning plate in a positioning auxiliary device;

[0032] Figure 5 It is a schematic diagram of the installation structure of the suspension rod in the positioning auxiliary device;

[0033] Figure 6 It is a structural schematic diagram of the slideway in the positioning auxiliary device;

[0034] Figure 7 It is a schematic diagram of the installation structure of the cross bar and the installation bar in the positioning auxiliary device;

[0035] Figure 8 It is a structural schematic diagram of the grouting auxiliary device in the positioning auxiliary device.

[0036] Legend:

[0037] 1. Vertical rod; 11. First section; 12. Second section; 2. Mounting rod; 3. Horizontal rod; 4. Positioning plate; 5. Positioning hole; 6. Hanging rod; 71. Handle; 72. Grouting pipe; 81. Slide groove; 82. Slide rod; 83. First clamping block; 84. Second clamping block; 85. Baffle. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0039] See also Figure 1-8 , the present invention provides a technical solution: a method for positioning a step installation hole in a well, using a positioning auxiliary device to position the step installation hole that needs to be opened on the well wall, the positioning auxiliary device includes a frame, a positioning unit and a mounting unit;

[0040] The frame includes two mutually parallel vertical rods 1, a mounting rod 2 installed between the two vertical rods 1, and a plurality of cross rods 3 installed between the two vertical rods 1. The plurality of cross rods 3 and the mounting rods 2 are mutually parallel. The projections of the mounting rods 2 and the cross rods 3 in the vertical direction are arc-shaped, and the arc outer diameters of the mounting rods 2 and the cross rods 3 match the diameter of the well wall, so that the mounting rods 2 and the cross rods 3 can both fit the well wall through the outer arc surface.

[0041] It should be understood that the number of cross bars 3 can be any number, but the more cross bars 3 there are, the larger the volume of the overall frame will be, and the heavier the weight of the overall frame will be. Therefore, the number of cross bars 3 needs to be determined based on the actual material used and the strength of the suspension rod 6.

[0042] The positioning unit includes a plurality of positioning plates 4 and positioning holes 5 formed on the surface of the positioning plates 4. The plurality of positioning plates 4 are evenly distributed on the plurality of cross bars 3 and are slidably matched with the cross bars 3.

[0043] The number of positioning plates 4 installed on each crossbar 3 is determined according to the number of steps required to be installed on each floor.

[0044] The installation unit includes a plurality of hanging rods 6, the cross-sectional shape and size of the hanging rods 6 are the same as the cross-sectional shape and size of the step to be installed, so that the hanging rods 6 can be inserted into the step installation hole, and the plurality of hanging rods 6 are slidably arranged on the installation rod 2, and the projection of the hanging rods 6 in the vertical direction has a portion exceeding the outer arc surface of the cross bar 3;

[0045] The method for installing and positioning the step in the well includes the following steps:

[0046] S100, obtain the distance between the two legs of the step to be installed, adjust the position of the positioning plate 4 on the cross bar 3 on the ground according to the obtained data, and adjust the hanging rod 6 according to the position of the positioning plate 4. The step generally includes two legs, which are inserted into the step installation hole through the two legs and concrete slurry is injected, and the step installation is completed after the concrete slurry solidifies. However, there will be a difference in the distance between the two legs of the step between steps of different widths. Therefore, it is necessary to adjust the position of the positioning plate 4 according to the actual step installation hole construction drawing, which can adapt to steps of different sizes. The national standard requires a height difference of 36 cm between steps, so the distance between the cross bars 3 can be kept at 36 cm without adjustment;

[0047] S200, the vertical rod 1 and the cross bar 3 are suspended in the well by contacting the hanging rod 6 with the well top surface, and the outer arc surface of the cross bar 3 is made to fit the well wall. The whole frame can be easily suspended in the well by the hanging rod 6, and no additional hole is needed to be opened in the well wall, which is more convenient to use. At the same time, the position accuracy of the positioning hole 5 can be ensured only after the cross bar 3 fits the well wall.

[0048] S300, the operator passes the drill bit of the drilling equipment through the positioning hole 5 and then drills holes in the well wall. If all the step installation holes that need to be opened in the well wall have been opened, the drilling is finished. If there are still step installation holes that need to be opened in the well wall, step S400 is performed;

[0049] S400, after step mounting holes are opened at the positions corresponding to all positioning holes 5 within the coverage range of the frame on the well wall surface, the frame is moved toward the center of the well to disengage the hanging rod 6 from the current contact surface, and then the hanging rod 6 is inserted into the lowest row of step mounting holes to reduce the height of the frame in the well, and then step S300 is repeated.

[0050] By designing a frame whose shape matches the well wall, the entire frame can fit into the well wall. That is to say, when it is necessary to drill a hole in the well wall, the position of the positioning plate 4 can be adjusted on the ground first. The position of the positioning hole 5 represents the position of the step installation hole. After the position of the positioning hole 5 is adjusted into place on the ground, the entire frame is placed into the well so that the outer arc surface of the cross bar 3 fits into the well wall. Then, the operator goes down the well and drills a hole using a drilling device. When drilling, the drill bit of the drilling device is kept coaxial with the positioning hole 5. Then, the well wall is drilled using the drilling device. In this way, the opening position of the step installation hole can be ensured to be accurate enough, and the final step installation position can be ensured to be accurate, thereby preventing subsequent rework. At the same time, the traditional steps of drawing lines and marking dots are eliminated, thereby improving the work efficiency of step installation, reducing the time of operators working at high altitudes, and reducing operational risks.

[0051] However, the height span between different wells is relatively large, ranging from a few meters to dozens of meters. The length of the vertical rod 1 cannot be exactly the same as the height of the well. Lengthening the vertical rod 1 as a whole will increase the production cost and it is not convenient to transport. Therefore, the hanging rod 6 is slidably set on the mounting rod 2. At the same time, the shape and size of the cross-section of the hanging rod 6 are the same as the shape and size of the cross-section of the step to be installed, so that the hanging rod 6 can be inserted into the step mounting hole. That is to say, when the height of the well is too high, the hanging rod 6 can be inserted into the step mounting hole that has been opened in the well wall. The step mounting hole is used as the fulcrum for the suspension of the entire frame. There is no need to open additional holes in the well wall. It can adapt to wells of different heights and ensure the accuracy of the subsequent step mounting hole opening position, further improving work efficiency.

[0052] Specifically, in step S300, after the step installation hole is opened in the well wall, the opened step installation hole needs to be cleaned to clean the residue in the step installation hole to ensure the adhesion between the concrete slurry and the inner wall surface of the step installation hole after solidification.

[0053] like Figure 8As shown, a grouting auxiliary device is hung on the vertical rod 1 through a hanging rope, and the grouting auxiliary device includes a handle 71 and a grouting pipe 72 fixed at one end of the handle 71. The diameter of the grouting pipe 72 is smaller than the diameter of the step installation hole. The grouting auxiliary device can be used when cleaning the step installation hole and conveying concrete slurry into the step installation hole.

[0054] Specifically, when cleaning the step installation hole, air is generally blown or water is supplied into the step installation hole. When blowing air into the step installation hole, the grouting pipe 72 is inserted into the step installation hole, and then the air supply pipe is connected to the end of the grouting pipe 72 exposed to the outside, so that the high-speed airflow can directly enter the innermost end of the step installation hole and flow outward from the innermost shortest part of the step installation hole, thereby improving the cleaning effect of the step installation hole. The same principle applies when using water flow to clean the step installation hole;

[0055] When grouting is injected into the step installation hole through the grouting pipe 72, the grouting pipe 72 slowly withdraws from the step installation hole as the volume of the grouting in the step installation hole increases, so as to ensure that the slurry at the inner end of the step installation hole is full, improve the quality of the grouting, and ensure the stability of the step after the final installation.

[0056] like Figure 4 As shown, in some examples, two positioning plates 4 are arranged in a group on the cross bar 3, and the two positioning plates 4 in the same group of positioning plates 4 are parallel to each other. The direction of the drill bit during drilling is guided by two positioning holes 5 opened on the two positioning plates 4 to prevent the axis center of the drill bit from deviating from the axis center of the positioning hole 5 during drilling, thereby ensuring that the position of the step mounting hole and the opening direction meet the design standards.

[0057] like Figure 7 As shown, the cross section of the vertical rod 1 is a rectangle, and the opposite sides of the two vertical rods 1 are the inner sides;

[0058] In this example, the horizontal bar 3 is installed on any side of the vertical bar 1 except the inner side, and the mounting rod 2 is installed on any side of the vertical bar 1 except the inner side, so as to prevent the vertical bar 1 from protruding from the leftmost and rightmost sides of the horizontal bar 3 and the mounting rod 2, and to prevent the vertical bar 1 from interfering with the inspection well wall, so as to prevent the horizontal bar 3 and the mounting rod 2 from being able to fit the well wall.

[0059] In some examples, such as Figure 2As shown, the vertical rod 1 includes a first section 11 and a second section 12 that penetrates the inner cavity of the first section 11, the two ends of the cross bar 3 are respectively fixed to the first sections 11 of the two vertical rods 1, and the two ends of the mounting rod 2 are respectively fixed to the second sections 12 of the two vertical rods 1. In the national standard, the distance between the top step and the top surface of the well should be 20 cm, which is different from the height difference of 36 cm between the steps. The state in which the hanging rod 6 is hung on the top surface of the well is defined as the first state, and the state in which the hanging rod 6 is hung in the step mounting hole is defined as the second state. In the first state, the hanging rod 6 is not too far from the top surface of the well. The spacing between the nearest positioning holes 5 is 20 cm, while in the second state, the spacing between the hanging rod 6 and the nearest positioning hole 5 is 36 cm, which makes the spacing between the mounting rod 2 and the nearest cross bar 3 different between the first state and the second state. Therefore, the vertical rod 1 is divided into a first section 11 and a second section 12, and the second section 12 is inserted into the inner cavity of the first section 11. At the same time, the mounting rod 2 is installed on the first section 11, and the cross bar 3 is installed on the second section 12. The spacing between the mounting rod 2 and the nearest cross bar 3 can be adjusted according to different usage states;

[0060] In this example, a fastening bolt is threadedly engaged on the outer surface of the first section 11 , and the fastening bolt extends into the inner cavity of the first section 11 and abuts against the surface of the second section 12 to fix the position of the second section 12 in the inner cavity of the first section 11 , thereby fixing the distance between the mounting rod 2 and the cross rod 3 .

[0061] like Figure 6 As shown, the top surfaces of the cross bar 3 and the mounting rod 2 are both provided with a slide groove 81 extending to the bottom surface, and the slide groove 81 is penetrated by a slide rod 82 that slidably cooperates with the slide groove 81, and the first clamping block 83 and the second clamping block 84 with adjustable spacing are installed at both ends of the slide rod 82, and the projections of the first clamping block 83 and the second clamping block 84 in the vertical direction both have a portion that exceeds the slide groove 81, and the first clamping block 83 and the second clamping block 84 are clamped on the upper and lower ends of the cross bar 3 or the mounting rod 2 to fix the position of the slide rod 82;

[0062] Figure 3-5 An example of a first clamping block 83 and a second clamping block 84 is shown. In this example, the second clamping block 84 is sleeved on the slide bar 82 and an adjustment handle at one end of the slide bar 82 is used to prevent the second clamping block 84 from being separated from the slide bar 82. The first clamping block 83 is threadedly engaged with the end of the slide bar 82 away from the adjustment handle. That is to say, by rotating the slide bar 82 to make the slide bar 82 and the first clamping block 83 rotate relative to each other, the position of the first clamping block 83 on the slide bar 82 can be changed, thereby achieving the effect of adjusting the distance between the first clamping block 83 and the second clamping block 84. The positioning plate 4 is installed on the first clamping block 83 to achieve sliding cooperation between the positioning plate 4 and the cross bar 3, and after the positioning plate 4 is moved into place, the cross bar 3 can be clamped by the first clamping block 83 and the second clamping block 84 to fix the position of the positioning plate 4.

[0063] In this example, if Figure 4 As shown, a baffle 85 is fixedly provided on the first clamping block 83 for being in close contact with the side of the cross bar 3 or the mounting rod 2 to prevent the first clamping block 83 from rotating. According to the working principle of the above-mentioned slide bar 82 and the first clamping block 83, it should be understood that when the slide bar 82 is rotated, the first clamping block 83 needs to be kept stationary to prevent the first clamping block 83 from rotating synchronously with the slide bar 82. After the baffle 85 is in close contact with the side of the cross bar 3 or the mounting rod 2, it can be ensured that the first clamping block 83 remains stationary relative to the cross bar 3 and the mounting rod 2 during the rotation of the cross bar 3, so as to ensure that the orientation of the mounting plate will not change.

[0064] The baffle 85 of the first clamping block 83 arranged on the mounting rod 2 is arranged on the side of the first clamping block 83 facing the outer arc surface of the mounting rod 2, so that the baffle 85 is in close contact with the outer arc surface of the mounting rod 2, and the hanging rod 6 can be installed on the baffle 85.

[0065] Optionally, the suspension rod 6 is installed on the first pressing block 83 .

[0066] In some examples, the cross bar 3 , the mounting bar 2 , and the vertical bar 1 are all hollow tubes, which reduces the weight of the entire frame and reduces the pressure on the suspension bar 6 .

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for positioning step installation holes in a well, characterized in that: A positioning auxiliary device is used to position the step installation holes that need to be opened on the well wall, and the positioning auxiliary device includes a frame, a positioning unit and a mounting unit; The frame comprises two mutually parallel vertical bars (1), a mounting bar (2) installed between the two vertical bars (1), and a plurality of cross bars (3) installed between the two vertical bars (1); the plurality of cross bars (3) and the mounting bar (2) are mutually parallel; the projections of the mounting bar (2) and the cross bars (3) in the vertical direction are in the shape of an arc; and the arc outer diameters of the mounting bar (2) and the cross bars (3) match the diameter of the well wall, so that the mounting bar (2) and the cross bars (3) can both fit the well wall through the outer arc surface; The positioning unit comprises a plurality of positioning plates (4) and positioning holes (5) provided on the surfaces of the positioning plates (4); the plurality of positioning plates (4) are evenly distributed on the plurality of cross bars (3) and are slidably matched with the cross bars (3); The mounting unit comprises a plurality of hanging rods (6), the plurality of hanging rods (6) being slidably arranged on the mounting rods (2), and the projections of the hanging rods (6) in the vertical direction have portions exceeding the outer arc surface of the crossbar (3); The method for installing and positioning the step in the well comprises the following steps: S100, obtaining the distance between two supporting legs of the step to be installed, adjusting the position of the positioning plate (4) on the crossbar (3) on the ground according to the obtained data, and adjusting the hanging rod (6) according to the position of the positioning plate (4); S200, the vertical rod (1) and the horizontal rod (3) are suspended in the well by making the hanging rod (6) contact with the well top surface, and the outer arc surface of the horizontal rod (3) is made to fit the well wall; S300, the operator passes the drill bit of the drilling equipment through the positioning hole (5) and then drills a hole in the well wall.

2. A method for positioning step installation holes in a well according to claim 1, characterized in that: The shape and size of the cross section of the hanging rod (6) are the same as the shape and size of the cross section of the step to be installed, so that the hanging rod (6) can be inserted into the step installation hole; In step S300, if all the step installation holes that need to be opened in the well wall have been opened, the drilling is finished; if there are still step installation holes that need to be opened in the well wall, step S400 is performed; S400, move the frame toward the center of the well so that the hanging rod (6) is out of contact with the current contact surface, and then insert the hanging rod (6) into the lowest row of step mounting holes to reduce the height of the frame in the well, and then repeat step S300.

3. A method for positioning step installation holes in a well according to claim 1, characterized in that: In step S300, after a step installation hole is opened on the well wall, the opened step installation hole needs to be cleaned. A grouting auxiliary device is hung on the vertical rod (1) by a hanging rope. The grouting auxiliary device includes a handle (71) and a grouting pipe (72) fixed at one end of the handle (71). The diameter of the grouting pipe (72) is smaller than the diameter of the step installation hole.

4. A method for positioning step installation holes in a well according to claim 1, characterized in that: Two positioning plates (4) on the crossbar (3) form a group, and the two positioning plates (4) in the same group of positioning plates (4) are parallel to each other.

5. A method for positioning step installation holes in a well according to claim 1, characterized in that: The cross section of the vertical rod (1) is rectangular, and the opposite sides of the two vertical rods (1) are inner sides; The cross bar (3) is installed on any side surface of the vertical bar (1) except the inner side surface; The mounting rod (2) is mounted on any side surface of the vertical rod (1) except the inner side surface.

6. A method for positioning step installation holes in a well according to claim 1, characterized in that: The vertical rod (1) comprises a first section (11) and a second section (12) inserted into the inner cavity of the first section (11); the two ends of the cross rod (3) are respectively fixed to the first sections (11) of the two vertical rods (1); and the two ends of the installation rod (2) are respectively fixed to the second sections (12) of the two vertical rods (1).

7. A method for positioning step installation holes in a well according to claim 1, characterized in that: The top surfaces of the cross bar (3) and the mounting rod (2) are provided with a slide groove (81) extending to the bottom surface, and the slide groove (81) is penetrated by a slide rod (82) slidably matched with the slide groove (81), and a first clamping block (83) and a second clamping block (84) with adjustable spacing are installed at both ends of the slide rod (82), and the projections of the first clamping block (83) and the second clamping block (84) in the vertical direction both have a portion that exceeds the slide groove (81), and the first clamping block (83) and the second clamping block (84) are clamped on the upper and lower ends of the cross bar (3) or the mounting rod (2) to fix the position of the slide rod (82).

8. A method for positioning step installation holes in a well according to claim 7, characterized in that: The second pressing block (84) is sleeved on the slide rod (82) and an adjustment handle at one end of the slide rod (82) is used to prevent the second pressing block (84) from being separated from the slide rod (82), and the first pressing block (83) is threadedly engaged with an end of the slide rod (82) away from the adjustment handle; The positioning plate (4) is fixedly arranged on the first pressing block (83) on the cross bar (3).

9. A method for positioning step installation holes in a well according to claim 8, characterized in that: A blocking piece (85) is fixedly provided on the first pressing block (83) and is used to closely contact the side of the cross bar (3) or the mounting bar (2) to prevent the first pressing block (83) from rotating; The blocking piece (85) on the mounting rod (2) is in contact with the outer arc surface of the mounting rod (2); The hanging rod (6) is fixedly mounted on the surface of the blocking piece (85) on the mounting rod (2).

10. A method for positioning step installation holes in a well according to claim 1, characterized in that: The cross bar (3), the mounting bar (2) and the vertical bar (1) are all hollow tubes.

Images