A method for positioning a step installation hole in a well

Abstract

The application discloses a kind of in-well step installation hole positioning method of the technical field of inspection well construction, the method is positioned by positioning auxiliary device to step installation hole is positioned, the diameter of the outer arc surface of cross bar is same with the diameter of well wall, so that the cross bar can be closely attached to well wall, sliding installation positioning plate on cross bar, positioning hole is opened on the surface of positioning plate, the outer arc surface of cross bar is used to simulate well wall to adjust the position of positioning plate, then the frame is put into well as a whole and the outer arc surface of cross bar is attached to well wall, the position of positioning hole is the position required to be opened for step installation hole, the opening position of step installation hole in well wall is more accurate by the above method, increase the acceptance rate of step, while the traditional complicated line drawing and dotting steps are saved, shorten the installation process, improve the overall work efficiency, while the time of high-altitude operation of operating personnel is also reduced, and the operation risk is reduced.

Description

TECHNICAL FIELD

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

[0002] In the urban drainage system, inspection wells are an indispensable component, which are used for inspection, cleaning and maintenance of the drainage pipeline. Steps are an important auxiliary facility of the inspection well, which are used for workers to enter and exit the inspection well to carry out daily maintenance and repair work.

[0003] The step installation process generally waits for the concrete of the inspection well to be formed, then measures, draws lines and punches points on the surface of the inspection well wall, and finally drills a hole. The process is too complex, the workers need to perform the above steps in the inspection well, and there is a risk of high-altitude operation. At the same time, when drawing lines, the current method is to use a cartridge line drawing method, which has low precision and can easily cause inaccurate final point positioning, resulting in that the final step installation cannot meet the acceptance standard, and the project needs to be reworked to cause economic losses due to the quality problem of the well shaft.

[0004] Based on this, the present application designs a method for positioning a step installation hole in a well to solve the above problems. SUMMARY

[0005] To achieve the above purpose, the present application provides the following technical scheme: a method for positioning a step installation hole in a well, which uses a positioning auxiliary device to position the step installation hole to be opened in the well wall, the positioning auxiliary device comprises a frame, a positioning unit and an installation unit;

[0006] The frame comprises two mutually parallel vertical rods, an installation rod installed between the two vertical rods and a plurality of horizontal rods installed between the two vertical rods, the plurality of horizontal rods and the installation rod are mutually parallel, the projection of the installation rod and the horizontal rod in the vertical direction is a circular arc, and the outer diameter of the circular arc of the installation rod and the horizontal rod matches the diameter of the well wall, so that the installation rod and the horizontal rod can be fitted to the well wall through the outer circular arc surface;

[0007] The positioning unit comprises a plurality of positioning plates and positioning holes opened on the surface of the positioning plates, and the plurality of positioning plates are uniformly distributed on the plurality of horizontal rods and are in sliding cooperation with the horizontal rods;

[0008] The installation unit comprises a plurality of suspension rods, the plurality of suspension rods are slidingly arranged on the installation rod, and the projection of the suspension rod in the vertical direction has a part that exceeds the outer circular arc surface of the horizontal rod;

[0009] The method for positioning a step installation hole in a well comprises the following steps:

[0010] S100, obtaining the distance between two feet of the required step, positioning the plate on the ground according to the obtained data, and adjusting the suspension rod according to the position of the positioning plate;

[0011] S200, suspending the vertical rod and the horizontal rod in the well by contacting the suspension rod with the top surface of the well, and making the outer arc surface of the horizontal rod adhere to the well wall;

[0012] S300, the operator drills the well wall after the drill bit of the drilling equipment passes through the positioning hole.

[0013] As a further scheme of the present application, the shape and size of the suspension rod section are the same as those of the step section to be installed, so that the suspension rod can be inserted into the step installation hole;

[0014] In step S300, if the step installation hole to be drilled in the well wall has been drilled, the drilling is ended; if there are still step installation holes to be drilled in the well wall, step S400 is performed;

[0015] S400, moving the frame to the center of the well to make the suspension rod disengage from the current contact surface, then inserting the suspension rod into the lowest row of step installation holes, so that the height of the frame in the well is lowered, and then repeating step S300.

[0016] As a further scheme of the present application, after the step installation hole is drilled in the well wall in step S300, the drilled step installation hole needs to be cleaned, the vertical rod is hung with a grouting auxiliary device through a hanging rope, the grouting auxiliary device includes a handle and a grouting pipe fixed to 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 scheme of the present application, the two positioning plates on the horizontal rod are a group, and the two positioning plates in the same group are parallel to each other.

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

[0019] As a further scheme of the present application, the vertical rod includes a first section and a second section inserted into the inner cavity of the first section, the two ends of the horizontal 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 scheme of the present application, the top surface of the horizontal rod and the mounting rod is provided with a sliding groove penetrating to the bottom surface, a sliding rod is arranged in the sliding groove in sliding cooperation with the sliding groove, the first and second pressing blocks with adjustable spacing are arranged at the two ends of the sliding rod, the projection of the first and second pressing blocks in the vertical direction exceeds the sliding groove, and the first and second pressing blocks are arranged at the upper and lower ends of the horizontal rod or the mounting rod to fix the position of the sliding rod.

[0021] As a further scheme of the present application, the second pressing block is sleeved on the sliding rod and prevented from being separated from the sliding rod by the adjusting handle at one end of the sliding rod, and the first pressing block is threadedly engaged with the end of the sliding rod away from the adjusting handle; and the positioning plate is fixedly arranged on the first pressing block arranged on the horizontal rod.

[0022] As a further scheme of the present application, the first pressing block is fixedly provided with a baffle for abutting against the side surface of the horizontal rod or the mounting rod to prevent the first pressing block from rotating; the baffle on the mounting rod is abutted against the outer arc surface of the mounting rod; and the suspension rod is fixedly arranged on the surface of the baffle on the mounting rod.

[0023] As a further scheme of the present application, the horizontal rod, the mounting rod and the vertical rod are all hollow pipes.

[0024] The present application has the following advantages:

[0025] The present application has the following advantages:

[0026] In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in

[0028] Figure 1 Flow chart of the method for positioning the installation hole of the step in the well;

[0029] Figure 2 Overall structure of the positioning auxiliary device;

[0030] Figure 3 Installation structure of the positioning plate in the positioning auxiliary device;

[0031] Figure 4 Second example structure of the positioning plate in the positioning auxiliary device;

[0032] Figure 5 Installation structure of the suspension rod in the positioning auxiliary device;

[0033] Figure 6 Structure of the sliding groove in the positioning auxiliary device;

[0034] Figure 7 Installation structure of the horizontal rod and the installation rod in the positioning auxiliary device;

[0035] Figure 8 Structure of the grouting auxiliary device in the positioning auxiliary device.

[0036] Legend:

[0037] 1, vertical rod; 11, first section; 12, second section; 2, installation rod; 3, horizontal rod; 4, positioning plate; 5, positioning hole; 6, suspension rod; 71, handle; 72, grouting pipe; 81, sliding groove; 82, sliding rod; 83, first pressing block; 84, second pressing block; 85, baffle. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered below.

[0039] Please refer to Figures 1-8 The present application provides a technical solution: a method for positioning the installation hole of the step in the well, which uses a positioning auxiliary device to position the installation hole of the step to be opened in the well wall, and the positioning auxiliary device comprises a frame, a positioning unit and an installation unit.

[0040] The frame comprises two mutually parallel vertical rods 1, a mounting rod 2 mounted between the two vertical rods 1, and a plurality of horizontal rods 3 mounted between the two vertical rods 1, the plurality of horizontal rods 3 and the mounting rod 2 being mutually parallel, the projections of the mounting rod 2 and the horizontal rods 3 in the vertical direction being circular arcs, and the outer diameters of the circular arcs of the mounting rod 2 and the horizontal rods 3 matching the diameter of the well wall, so that the mounting rod 2 and the horizontal rods 3 can be attached to the well wall through the outer circular arc surfaces.

[0041] It should be understood that the number of horizontal rods 3 can be any number, but the more the number of horizontal rods 3, the larger the overall frame volume, and the heavier the overall frame weight, so the number of horizontal rods 3 needs to be determined according to the actual use of the material and the strength of the suspension rod 6.

[0042] The positioning unit comprises a plurality of positioning plates 4 and positioning holes 5 formed on the surface of the positioning plates 4, and the plurality of positioning plates 4 are uniformly distributed on the plurality of horizontal rods 3 and are in sliding cooperation with the horizontal rods 3.

[0043] The number of positioning plates 4 mounted on each horizontal rod 3 is determined according to the number of steps to be installed on each layer.

[0044] The mounting unit comprises a plurality of suspension rods 6, the shape and size of the cross section of the suspension rod 6 are the same as the shape and size of the cross section of the step to be installed, so that the suspension rod 6 can be inserted into the step mounting hole, and the plurality of suspension rods 6 are slidingly arranged on the mounting rod 2, and the projection of the suspension rod 6 in the vertical direction has a part that exceeds the outer circular surface of the horizontal rod 3.

[0045] The well step mounting hole positioning method comprises the following steps:

[0046] S100, obtaining the distance between the two feet of the step to be installed, adjusting the position of the positioning plate 4 on the horizontal rod 3 on the ground according to the obtained data, and adjusting the suspension rod 6 according to the position of the positioning plate 4, the step generally comprises two feet, which are inserted into the step mounting hole and injected with mortar, and the installation of the step is completed after the mortar is solidified, but the distance between the two feet of the step will vary with the width of the step, so the position of the positioning plate 4 needs to be adjusted according to the actual step mounting hole construction drawing to adapt to different sizes of steps, and the national standard requires that the height difference between the steps be 36 cm, so the distance between the horizontal rods 3 can be kept at 36 cm without adjustment.

[0047] S200, suspending the vertical rod 1 and the horizontal rod 3 in the well through the contact between the suspension rod 6 and the well top surface, and making the outer circular surface of the horizontal rod 3 fit the well wall, the overall frame can be easily suspended in the well through the suspension rod 6 without additional holes in the well wall, which is more convenient to use, and the position accuracy of the positioning hole 5 can be ensured only when the horizontal rod 3 fits the well wall.

[0048] S300, the worker drills the well wall after the drill bit of the drilling equipment passes through the positioning hole 5, if the step installation holes to be opened in the well wall have all been opened, the drilling is ended, if there are still step installation holes to be opened in the well wall, step S400 is performed;

[0049] S400, after the step installation holes corresponding to all the positioning holes 5 in the surface frame coverage range of the well wall are opened, the frame is moved to the center of the well to make the suspension rod 6 disengage from the current contact surface, then the suspension rod 6 is inserted into the lowest row of step installation holes, so that the height of the frame in the well is lowered, then step S300 is repeated.

[0050] By designing a frame matching the shape of the well wall, the frame can be attached to the well wall as a whole, that is, when the well wall needs to be drilled, the position of the positioning plate 4 on the ground can be adjusted 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 on the ground, the whole frame is placed in the well so that the outer circular surface of the horizontal rod 3 is attached to the well wall, then the worker goes down into the well and drills through the drilling equipment, when drilling, the drill bit of the drilling equipment is coaxial with the positioning hole 5, then the drilling equipment drills the well wall, which can ensure that the position of the step installation hole is accurate enough, and the final step installation position is accurate, preventing subsequent rework, while eliminating the need for traditional line drawing and dotting, improving the work efficiency of step installation, reducing the time of high-altitude operation of the worker, and reducing the operation risk.

[0051] However, the height span of different wells is large, from several meters to tens of meters, and the length of the vertical rod 1 cannot be exactly the same as the height of the well, and lengthening the vertical rod 1 as a whole will increase the production cost, and it is not convenient to transport, therefore, the suspension rod 6 is slidingly arranged on the mounting rod 2, and the shape and size of the cross section of the suspension rod 6 are the same as the shape and size of the cross section of the step to be installed, so that the suspension rod 6 can be inserted into the step installation hole, that is, when the height of the well is too high, the suspension rod 6 can be inserted into the step installation hole already opened in the well wall, and the step installation hole serves as the fulcrum of the whole frame, and it is not necessary to additionally open a hole in the well wall, which can adapt to wells of different heights, and can ensure the accuracy of the position of the subsequent step installation hole, and further improve the 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 remove the residues in the step installation hole, so as to ensure the adhesion between the set cement and the inner wall of the step installation hole.

[0053] As Figure 8As shown, the vertical rod 1 is hung with a grouting auxiliary device through 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, and 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, generally blowing gas or water into the step installation hole, when blowing gas into the step installation hole, the grouting pipe 72 is inserted into the step installation hole, and then the gas pipe is connected to the end of the grouting pipe 72 exposed outside, so that the high-speed airflow can directly enter the innermost end of the step installation hole and flow outward from the innermost end of the step installation hole, improving the cleaning effect of the step installation hole. The same principle is used when using water flow to clean the step installation hole;

[0055] When grouting into the step installation hole through the grouting pipe 72, the grouting pipe 72 slowly exits from the step installation hole outward as the volume of grouting in the step installation hole increases, to ensure that the inner end of the step installation hole is full of grout, improve the quality of grouting, and ensure the stability of the final step installation.

[0056] As shown in the drawings, Figure 4 In some examples, two positioning plates 4 on the horizontal rod 3 are a group, the two positioning plates 4 in the same group are parallel to each other, and the direction of the drill bit during drilling is guided through the two positioning holes 5 opened on the two positioning plates 4, preventing the axis of the drill bit during drilling from deviating from the axis of the positioning hole 5, and ensuring that the position and hole direction of the step installation hole meet the design standard.

[0057] As shown in the drawings, Figure 7 The vertical rod 1 is rectangular in cross section, and the opposite sides of the two vertical rods 1 are inner sides;

[0058] In this example, the horizontal rod 3 is installed on any side of the vertical rod 1 except the inner side, and the mounting rod 2 is installed on any side of the vertical rod 1 except the inner side, to prevent the vertical rod 1 from protruding from the leftmost and rightmost sides of the horizontal rod 3 and the mounting rod 2, and to prevent the vertical rod 1 from interfering with the inspection well wall, causing the horizontal rod 3 and the mounting rod 2 to not fit the well wall

[0059] In some examples, as shown in the drawings, Figure 2As shown, the vertical rod 1 includes a first section 11 and a second section 12 passing through the inner cavity of the first section 11. The two ends of the horizontal rod 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 20cm, which is different from the height difference of 36cm between the steps. The state in which the suspension rod 6 is suspended on the top surface of the well is defined as the first state, and the state in which the suspension rod 6 is suspended in the step mounting hole is defined as the second state. In the first state, the suspension rod 6 and the top step are respectively fixed to the first section 11. The distance between the nearest positioning holes 5 is 20cm, while in the second state, the distance between the suspension rod 6 and the nearest positioning hole 5 is 36cm. This makes the interval between the mounting rod 2 and the nearest horizontal bar 3 different in the first and second states. Therefore, the vertical rod 1 is divided into a first section 11 and a second section 12. The second section 12 passes through the inner cavity of the first section 11. At the same time, the mounting rod 2 is installed on the first section 11, while the horizontal bar 3 is installed on the second section 12. The distance between the mounting rod 2 and the nearest horizontal bar 3 can be adjusted according to different usage states.

[0060] In this example, the outer surface of the first section 11 is threaded with a fastening bolt, which 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 crossbar 3.

[0061] like Figure 6 As shown, the top surfaces of both the crossbar 3 and the mounting rod 2 are provided with a sliding groove 81 that extends to the bottom surface. A sliding rod 82 that slides through the sliding groove 81 is provided in the sliding groove 81. A first pressing block 83 and a second pressing block 84 with adjustable spacing are installed at both ends of the sliding rod 82. The projections of the first pressing block 83 and the second pressing block 84 in the vertical direction both have a portion that extends beyond the sliding groove 81. The first pressing block 83 and the second pressing block 84 are pressed against the upper and lower ends of the crossbar 3 or the mounting rod 2 to fix the position of the sliding rod 82.

[0062] Figures 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 rod 82 and is prevented from disengaging from the slide rod 82 by an adjusting handle at one end of the slide rod 82. The first clamping block 83 is threaded onto the end of the slide rod 82 away from the adjusting handle. That is, rotating the slide rod 82 causes the slide rod 82 and the first clamping block 83 to rotate relative to each other, which changes the position of the first clamping block 83 on the slide rod 82, thereby 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 a sliding fit between the positioning plate 4 and the crossbar 3. After the positioning plate 4 is moved into place, the first clamping block 83 and the second clamping block 84 can also be used to press the crossbar 3 to fix the position of the positioning plate 4.

[0063] In the present example, as shown in Figure 4 The first pressing block 83 is fixed with a baffle 85 for abutting against the side of the horizontal rod 3 or the mounting rod 2 to prevent the first pressing block 83 from rotating. According to the working principle of the slide rod 82 and the first pressing block 83 described above, it should be understood that the first pressing block 83 needs to be kept stationary when the slide rod 82 is rotated, and the baffle 85 is abutted against the side of the horizontal rod 3 or the mounting rod 2 to ensure that the first pressing block 83 remains stationary relative to the horizontal rod 3 and the mounting rod 2 during the rotation of the horizontal rod 3, and the orientation of the mounting plate cannot be changed.

[0064] The baffle 85 of the first pressing block 83 provided on the mounting rod 2 is provided on the side of the first pressing block 83 facing the outer arc surface of the mounting rod 2, so that the baffle 85 is abutted against the outer arc surface of the mounting rod 2, and then the suspension rod 6 can be mounted on the baffle 85.

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

[0066] In some examples, the horizontal rod 3, the mounting rod 2, and the vertical rod 1 are all hollow pipes, which reduces the weight of the overall frame and reduces the pressure on the suspension rod 6.

[0067] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of locating a landing hole for a landing installation in a well, characterized in that: The positioning auxiliary device is used for positioning the step installation hole to be opened on the well wall, and the positioning auxiliary device comprises a frame, a positioning unit and an installation unit. The frame comprises two vertical rods (1) parallel to each other, an installation rod (2) installed between the two vertical rods (1), and a plurality of horizontal rods (3) installed between the two vertical rods (1), the plurality of horizontal rods (3) and the installation rod (2) are parallel to each other, the projection of the installation rod (2) and the horizontal rod (3) in the vertical direction is a circular arc, and the outer diameter of the circular arc of the installation rod (2) and the horizontal rod (3) matches the diameter of the well wall, so that the installation rod (2) and the horizontal rod (3) can be attached to the well wall through the outer circular arc surface. The positioning unit comprises a plurality of positioning plates (4) and positioning holes (5) formed on the surface of the positioning plates (4), and the plurality of positioning plates (4) are uniformly distributed on the plurality of horizontal rods (3) and are in sliding cooperation with the horizontal rods (3). The top surface of the horizontal rod (3) and the installation rod (2) is provided with a sliding groove (81) penetrating to the bottom surface, a sliding rod (82) is arranged in the sliding groove (81) and is in sliding cooperation with the sliding groove (81), the first pressing block (83) and the second pressing block (84) are arranged at the two ends of the sliding rod (82) and are adjustable in spacing, the projection of the first pressing block (83) and the second pressing block (84) in the vertical direction exceeds the sliding groove (81), and the positions of the sliding rod (82) are fixed by pressing the first pressing block (83) and the second pressing block (84) on the upper and lower ends of the horizontal rod (3) or the installation rod (2). The installation unit comprises a plurality of suspension rods (6), and the plurality of suspension rods (6) are arranged on the installation rod (2) in sliding mode, and the projection of the suspension rod (6) in the vertical direction exceeds the outer circular arc surface of the horizontal rod (3). The step installation hole positioning method in the well comprises the following steps: S100, obtaining the spacing between the two feet of the step to be installed, adjusting the position of the positioning plate (4) on the horizontal rod (3) on the ground according to the obtained data, and adjusting the suspension rod (6) according to the position of the positioning plate (4); S200, suspending the vertical rod (1) and the horizontal rod (3) in the well by contacting the suspension rod (6) with the top surface of the well, and making the outer circular arc surface of the horizontal rod (3) adhere to the well wall; S300, the drill bit of the drilling equipment is inserted into the positioning hole (5) by the operation personnel, and the well wall is drilled.

2. A method of locating a step installation hole in accordance with claim 1, wherein: The shape and size of the cross section of the suspension rod (6) are the same as those of the cross section of the step to be installed, so that the suspension rod (6) can be inserted into the step installation hole; In step S300, if the step installation hole to be opened on the well wall has been opened, the drilling is ended, and if there is still a step installation hole to be opened on the well wall, step S400 is performed; S400, moving the frame to the center of the well to make the suspension rod (6) contact with the current contact surface, and then inserting the suspension rod (6) into the lowest row of step installation holes, so that the height of the frame in the well is reduced, and then repeating step S300.

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

4. The method of claim 1, wherein: The two positioning plates (4) on the horizontal rod (3) are a group, and the two positioning plates (4) in the same group are parallel to each other.

5. The method of claim 1, wherein: The vertical rod (1) is rectangular in cross section, and the opposite sides of the two vertical rods (1) are inner sides. The horizontal rod (3) is installed on any side of the vertical rod (1) except the inner side. The mounting rod (2) is installed on any side of the vertical rod (1) except the inner side.

6. The method of claim 1, wherein: The vertical rod (1) includes a first section (11) and a second section (12) arranged in the inner cavity of the first section (11), the horizontal rod (3) is fixed at the first section (11) of the two vertical rods (1) at both ends, and the mounting rod (2) is fixed at the second section (12) of the two vertical rods (1) at both ends.

7. The method of claim 1, wherein: The second pressing block (84) is sleeved on the sliding rod (82) and prevented from being separated from the sliding rod (82) by the adjusting handle at one end of the sliding rod (82), and the first pressing block (83) is threadedly engaged on the sliding rod (82) at an end away from the adjusting handle. The positioning plate (4) is fixed on the first pressing block (83) arranged on the horizontal rod (3).

8. A method of locating a step installation hole in accordance with claim 7, wherein: The first pressing block (83) is fixed with a baffle (85) for closely contacting the side surface of the horizontal rod (3) or the mounting rod (2) to prevent the first pressing block (83) from rotating. The baffle (85) on the mounting rod (2) is attached to the outer arc surface of the mounting rod (2). The suspension rod (6) is fixedly installed on the surface of the baffle (85) on the mounting rod (2).

9. The method of claim 1, wherein: The horizontal rod (3), the mounting rod (2) and the vertical rod (1) are all hollow tubes.

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