Steel casing inner wall mud cake cleaning device and construction method thereof

Abstract

The invention provides a steel casing inner wall mud cake cleaning device and a construction method thereof.The steel casing inner wall mud cake cleaning device comprises a hammerhead and cleaning parts matched with hammerhead blade feet, one end of each cleaning part is in an arc shape, and the other end of each cleaning part is arranged outside one hammerhead blade foot of the hammerhead in a striding mode and can be adjusted to be away from or close to the hammerhead blade foot; the arc-shaped end is close to or far away from the inner wall of the steel casing. An existing hammer is modified, the length-adjustable cleaning component is additionally arranged on the blade foot of the hammer, when mud cake in a steel casing needs to be cleaned, the mud cake cleaning operation can be carried out only by adjusting the cleaning component to the position matched with the inner diameter of the steel casing, the hammer can be suitable for steel casings with different inner diameters, and the application range is wide; in addition, the arc-shaped end of the cleaning component is matched with the inner wall of the steel casing in shape, integrity is high, fixation is firm, falling and deformation are not prone to occurring in the hole sweeping process, repeated use can be achieved, the stability of the cleaning device is improved, and the cleaning effect is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a device for cleaning mud on the inner wall of a steel casing and a construction method thereof. Background Art

[0002] In a certain bridge pile foundation construction project, bored cast-in-place piles were used to construct the pile foundation. The diameters of the water pile foundations involved were 2.0m, 1.8m, and 1.6m, respectively, and the corresponding steel casing diameters were 2.3m, 2.1m, and 1.9m, respectively. The steel casing was driven into the riverbed sand layer at geological depths ranging from 10m to 14m. The in-hole slurry making process adopts the soil-adding slurry making method, that is, qualified slurry making soil is poured into the steel casing, and the slurry making soil gradually forms mud under the impact of the hammer head. Take the pile foundation with a diameter of 2.0 meters as an example: because the hammer head has a diameter of 2.0m and the steel casing has a diameter of 2.3m, there is a 15cm gap between the hammer head and the steel casing wall on both sides. When the hammer head hammers the slurry making soil, part of the slurry making soil adheres to the sand layer in this area, resulting in the final formation of mud skin. According to actual detection, the 15cm wide area is composed of 11cm thick sand layer and 4cm thick mud skin. If the mud skin in the steel casing is disturbed by the jacking of concrete during the pouring of pile foundation, resulting in the instability of the mud skin wall, the sand and mud skin in the 15cm wide area will have local collapse holes and enter the 2.0m pile foundation range, resulting in pile foundation defects. Therefore, measures need to be taken to clean the sand and mud skin in the 15cm area. At present, the conventional method of cleaning the mud skin on the inner wall of the sand layer geological steel casing is as follows:

[0003] Method 1: When the hole needs to be cleaned, the impact drill hammer is taken out, and then a temporary mud cleaning device that fits the inner diameter of the steel casing is welded on the outside of the impact drill hammer. After the mud cleaning is completed, the device needs to be removed and then the normal drilling operation is repeated. However, this method requires the preparation of a temporary mud cleaning device of corresponding size according to the inner diameter of the steel casing, which is difficult to reuse and not very practical.

[0004] Method 2: When the hole needs to be cleaned, after the impact drill hammer is taken out, it is necessary to set a counterweight and related rods on the impact drill hammer to fix it at the hole mouth, and then use a brush to clean the mud skin in the steel casing. After cleaning, the normal drilling operation can be repeated. However, the brush is used to clean the mud skin in the steel casing. The brush has limited stability and is easy to fall off during the hole cleaning process. The brush needs to be replaced regularly, and the cleaning effect is not good after a certain number of uses. It needs to be cleaned multiple times, and the cleaning process is time-consuming and laborious.

[0005] Therefore, how to ensure the stability of the mud skin cleaning device and the cleaning effect while being applicable to the mud skin cleaning of steel casings with different inner diameters is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] The purpose of the present invention is to provide a device for cleaning the mud skin on the inner wall of a steel casing and a construction method thereof, which can ensure the stability of the mud skin cleaning device and the cleaning effect, and can be suitable for cleaning the mud skin of steel casings with different inner diameters.

[0007] In order to solve the above technical problems, the present invention provides a device for cleaning mud skin on the inner wall of a steel casing, wherein the device for cleaning mud skin on the inner wall of a steel casing comprises: a hammer head and a cleaning component matched with a hammer head blade foot, wherein one end of each cleaning component is arc-shaped, and the other end is straddled outside a hammer head blade foot of the hammer head, and can be adjusted to move away from or closer to the hammer head blade foot so that one end of the arc is close to or away from the inner wall of the steel casing.

[0008] Optionally, in the mud skin cleaning device for the inner wall of the steel casing, each of the cleaning components comprises: two adjusting components and an arc-shaped steel plate straddling the top ends of the two adjusting components; wherein each adjusting component comprises: a fixed sleeve, two pads, two positioning nuts and a steel chisel; the fixed sleeves of the two adjusting components are respectively fixed on both sides of the middle section of the hammer blade foot; each fixed sleeve is sleeved on the steel chisel whose one end is fixed on the inner wall of the arc-shaped steel plate, and the steel chisel can move horizontally along the axis of the fixed sleeve to make the arc-shaped steel plate move away from or close to the inner wall of the steel casing; a pad and a positioning nut are symmetrically sleeved on the steel chisels on both sides of the fixed sleeve; the pad is vertically fixed to the end of the fixed sleeve and fixedly connected to the adjacent hammer blade foot; the positioning nuts on both sides of the fixed sleeve rotate relative to the fixed sleeve to fix the relative position of the steel chisel and the fixed sleeve.

[0009] Optionally, in the device for cleaning the mud skin on the inner wall of the steel casing, the arc-shaped steel plate has a length of 1.3 m, a thickness of 20 mm, a height of 100 mm, and an arc of 75°.

[0010] Optionally, in the device for cleaning the mud skin on the inner wall of the steel casing, the steel chisel is a fine-rolled threaded steel bar with a diameter of 32 mm and a length of 435 mm.

[0011] Optionally, in the device for cleaning mud from the inner wall of a steel casing, the inner diameter of the fixed sleeve is 35 mm, the wall thickness is 10 mm, and the length is 255 mm.

[0012] Optionally, in the device for cleaning mud from the inner wall of a steel casing, the length of the pad is 80 mm, the width is 80 mm, and the thickness is 10 mm; the inner diameter of the positioning nut is 35 mm in circle, the length of the outer hexagonal diagonal is 55 mm, and the height is 30 mm.

[0013] Optionally, in the device for cleaning the mud skin on the inner wall of the steel casing, the hammer head is a four-cornered hammer head, the number of the hammer head blade feet is four, and the number of the cleaning parts is four.

[0014] The present invention also provides a construction method of a steel casing inner wall mud skin cleaning device, the construction method of the steel casing inner wall mud skin cleaning device comprising:

[0015] S1. According to the inner diameter of the steel casing to be cleaned of mud skin, the cleaning component is adjusted to be away from the hammer blade foot so that one end of the arc is close to the inner wall of the steel casing;

[0016] S2. Pull up and down the drilling rig wire rope so that the hammer head rotates under the torsion of the wire rope, so that the arc-shaped end of the cleaning component cleans the mud skin on the inner wall of the steel casing.

[0017] Optionally, in the construction method of the steel casing inner wall mud cleaning device, step S1 includes the following steps:

[0018] According to the inner diameter of the steel casing to be cleaned of mud, the length of the steel chisel extending out of the fixed sleeve is adjusted so that the arc-shaped steel plate is at a predetermined distance from the inner wall of the steel casing.

[0019] Optionally, in the construction method of the steel casing inner wall mud cleaning device, the predetermined distance is 3cm-5cm.

[0020] The device for cleaning the inner wall mud of the steel casing provided by the present invention has the following advantages:

[0021] 1) The arc-shaped end of the cleaning component is adapted to the inner wall shape of the steel casing, has strong integrity, is firmly fixed, is not easy to fall off and deform during the hole sweeping process, can be reused many times, improves the stability of the cleaning device, and effectively improves the cleaning effect.

[0022] 2) By modifying the existing hammer head, a fixed sleeve and a pad are permanently added to the blade foot of the hammer head. When it is necessary to clean the mud on the inner wall of the steel casing, it is only necessary to insert the arc-shaped steel plate and the steel chisel in the cleaning component into the appropriate position in the fixed sleeve and fix them with the positioning nut to carry out the mud cleaning operation. It can be applied to steel casings with different inner diameter specifications and has a wide range of applications.

[0023] 3) After the mud skin is cleaned, only the arc-shaped steel plate and steel chisel in the cleaning component need to be removed to avoid the influence of the arc-shaped end of the cleaning component on the punching operation, so that the mud skin cleaning device on the inner wall of the steel casing can be circulated into the normal punching process.

[0024] 4) The mud skin cleaning device on the inner wall of the steel casing has a simple structure, high strength, good durability, high economic effectiveness, saves man-hours, has high mud skin cleaning efficiency, and solves the problem of incomplete cleaning of the mud skin on the inner wall of the steel casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0026] Figure 1 It is an assembly diagram of a device for cleaning mud skin on the inner wall of a steel casing according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A top view of

[0028] Figure 3 An assembly diagram of a cleaning component in one embodiment of the present invention;

[0029] Figure 4 for Figure 3 A top view of

[0030] Figure 5 The present invention is a flow chart of a construction method of a device for cleaning mud skin on the inner wall of a steel casing according to an embodiment of the present invention.

[0031] In the figure:

[0032] 1- hammer head; 2- arc steel plate; 3- fixed sleeve; 4- pad; 4-1- outer pad; 4-2- inner pad; 5- positioning nut; 5-1- outer positioning nut; 5-2- inner positioning nut; 6- steel chisel. DETAILED DESCRIPTION

[0033] The following is a further detailed description of the steel casing inner wall mud cleaning device and its construction method proposed by the present invention in combination with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0035] In the description of the invention, it is necessary to understand that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to the specific circumstances.

[0038] Please refer to Figure 1 and Figure 2 The mud skin cleaning device for the inner wall of the steel casing comprises: a hammer head 1 and a cleaning component matched with the hammer head blade foot, one end of each cleaning component is arc-shaped, and the other end is arranged outside a hammer head blade foot of the hammer head, and can be adjusted to move away from or close to the hammer head blade foot, so that one end of the arc is close to or away from the inner wall of the steel casing. In this way, it is suitable for the mud skin cleaning needs of steel casings with different inner diameter specifications, and the position of one end of the arc can be adjusted according to the needs of different construction stages to support the construction of the corresponding stage.

[0039] For example: when it is necessary to clean the mud skin inside the steel casing, it is only necessary to adjust the cleaning component to a position that is suitable for the inner diameter of the steel casing to carry out the mud skin cleaning operation. It can be applied to steel casings with different inner diameter specifications and has a wide range of applications.

[0040] After the mud skin cleaning is completed, when it is necessary to continue the hammer punching operation, it is only necessary to remove the arc-shaped steel plate and steel chisel in the cleaning component to avoid the influence of the arc-shaped end of the cleaning component on the punching operation, so that the mud skin cleaning device on the inner wall of the steel casing can be circulated into the normal punching process.

[0041] In this embodiment, Figure 1 and Figure 2 As shown, the hammer head 1 is a four-cornered hammer head, the number of the hammer head blade feet is four, and the number of the cleaning parts is four.

[0042] like Figure 2 , Figure 3 and Figure 4 As shown, each of the cleaning components comprises: two adjusting components and an arc-shaped steel plate 2 straddling the tops of the two adjusting components; wherein each adjusting component comprises: a fixed sleeve 3, two pads 4, two positioning nuts 5 and a steel chisel 6; the fixed sleeves 3 of the two adjusting components are respectively fixed to the two sides of the middle section of the hammer blade foot, that is, the fixed sleeves 3 are respectively welded on both sides of the middle section of the hammer blade foot, and the weld must fully fill the gap between the fixed sleeve 3 and the hammer blade foot to ensure that the fixed sleeve 3 and the pad 4 are permanently fixed on the hammer head 1; the steel chisels 6 of the two adjusting components are both fixed on an arc-shaped steel plate 2, and the fixed positions The center lines of the two fixed sleeves 3 are used as the reference; each fixed sleeve 3 is sleeved on a steel chisel 6 whose one end is fixed on the inner wall of the arc-shaped steel plate 2, and the steel chisel 6 can move in a translational manner along the axis of the fixed sleeve 3, so that the arc-shaped steel plate 2 is away from or close to the inner wall of the steel casing; a pad 4 and a positioning nut 5 are symmetrically sleeved on the steel chisels 6 on both sides of the fixed sleeve 3; the pad 4 is vertically fixed to the end of the fixed sleeve 3 and fixedly connected to the adjacent hammer blade foot; the positioning nuts 5 on both sides of the fixed sleeve 3 rotate relative to the fixed sleeve 3 to fix the relative position of the steel chisel 6 and the fixed sleeve 3, and then fix the position of the arc-shaped steel plate 2. Preferably, the steel chisel 6 is threadedly connected to the fixed sleeve 3, and the rotational movement of the steel chisel 6 along the fixed sleeve 3 is converted into a linear motion (i.e., translation) along the axis of the fixed sleeve 3.

[0043] Specifically, the arc-shaped steel plate 2 in the cleaning component responsible for cleaning the mud skin has the characteristics of strong integrity, firm fixation, and not easy to fall off and deform during the hole cleaning process, so that it can be reused many times, improving the stability of the cleaning device and effectively improving the cleaning effect.

[0044] Preferably, during the assembly and construction of the mud skin cleaning device for the inner wall of the steel casing of the present invention, the fixed sleeve 3, the backing plate 4 and the hammer head 1 are welded and connected, and the arc-shaped steel plate 2 and the steel chisel 6 are welded and connected. The detachable part of the cleaning component only involves the steel chisel 6 and the positioning nut 5. The steel chisel 6 is inserted into the fixed sleeve 3 and clamped by the positioning nut 5, so that the arc-shaped steel plate 2, the steel chisel 6 and the hammer head 1 are firmly connected, and the whole assembly and disassembly are quick, which greatly improves the assembly efficiency and quality.

[0045] Specifically, the assembly process of the steel casing inner wall mud skin cleaning device of the present invention is as follows:

[0046] Please refer to Figure 4In order to facilitate the understanding of the assembly sequence, the two pads 4 are divided into an inner pad 4-2 and an outer pad 4-1, and the two positioning nuts are divided into an inner positioning nut 5-2 and an outer positioning nut 5-1. The specific assembly process is: after the fixed sleeve 3 and the pad 4 are welded and fixed at the hammer blade foot of each hammer head, an outer positioning nut 5-1 is first screwed to the end of the steel drill 6 close to the position of the arc steel plate, and then the steel drill 6 is welded and fixed to the arc steel plate 2, and then the arc steel plate 2, the steel drill 6 and the positioning nut 5-1 are inserted from the outside to the inside into the fixed sleeve 3 through the steel drill 6. The penetration depth can be freely adjusted according to the inner diameter of the steel casing. After the penetration is completed, tighten the outer positioning nut 5-1 to the outer pad 4-1 with a torque wrench, and then insert the inner positioning nut 5-2 from the inside to the inner pad 4-2, and tighten the inner positioning nut 5-2 with a torque wrench to ensure that the steel drill 6 and the arc steel plate 2 are firmly clamped at the fixed sleeve 3 and the pad 4. After all the assembling is completed, the drilling rig wire rope is pulled up and down, so that the hammer head 1 is pulled up and down and rotates under the torsion of the wire rope, and the arc-shaped steel plate 2 can clean the mud skin and sand layer on the inner wall of the steel casing.

[0047] In this embodiment, the parameters of each component are as follows: the length of the arc-shaped steel plate 2 is 1.3m, the thickness is 20mm, the height is 100mm, and the curvature is 75°; the steel drill 6 is a fine-rolled threaded steel bar with a diameter of 32mm and a length of 435mm; the inner diameter of the fixed sleeve 3 is 35mm, the wall thickness is 10mm, and the length is 255mm.

[0048] Preferably, the length of the pad 4 is 80 mm, the width is 80 mm, and the thickness is 10 mm; the inner diameter of the positioning nut 5 is a 35 mm circle, the length of the outer hexagonal diagonal is 55 mm, and the height is 30 mm.

[0049] Correspondingly, this embodiment also provides a construction method for a steel casing inner wall mud cleaning device. Figure 5 The construction method of the steel casing inner wall mud skin cleaning device described in this embodiment is described in detail.

[0050] First, step S1 is performed to adjust the cleaning component relative to the hammer blade foot to move away from the inner diameter of the steel casing to be cleaned of mud skin, so that one end of the arc is close to the inner wall of the steel casing.

[0051] Specifically, according to the inner diameter of the steel casing to be cleaned of mud skin, the length of the steel drill 6 extending out of the fixed sleeve 3 is adjusted so that the arc-shaped steel plate 2 is a predetermined distance away from the inner wall of the steel casing. Preferably, the predetermined distance is 3cm-5cm. The remaining 3cm-5cm thick sand layer will fall off freely from the inner wall of the steel casing because it is not wrapped by the outer mud skin.

[0052] Here, the selection criteria of the predetermined distance can effectively prevent the arc-shaped steel plate 2 from colliding with the steel casing wall during the hole sweeping process due to the non-verticalness of the steel casing itself, deformation of the steel casing, or misalignment of the hammer head.

[0053] Next, step S2 is performed to pull up and down the drill wire rope so that the hammer head 1 rotates under the torsion of the wire rope, so that the arc-shaped end of the cleaning component cleans the mud skin on the inner wall of the steel casing.

[0054] The actual work efficiency analysis of the steel casing inner wall mud skin cleaning device based on the present invention is as follows:

[0055] According to statistics, taking the four-cornered hammer head as an example, after the fixed sleeve 3 and the pad 4 are welded and positioned at the hammer head blade foot, it takes 3 minutes for the arc steel plate 2 and the steel chisel 6 of each subsequent cleaning component to penetrate the fixed sleeve 3 and be firmly installed through the pad 4 and the positioning nut 5. The assembly of four cleaning components (each group of cleaning components includes an arc steel plate 2, 2 steel chisels 6, 4 positioning nuts 5, and 4 pads 4) takes a total of 12 minutes. The weight of a cleaning component is about 25kg, and a worker can complete the assembly of the cleaning components independently. According to the test, the hammer head 1 can be effectively cleaned by pulling it up and down 3 times within the height range of the steel casing. Each pull takes 5 minutes, a total of 15 minutes. In summary, it can be seen that the steel casing inner wall mud skin cleaning device only takes 27 minutes to clean the inner wall mud skin of a steel casing each time. One worker can complete it independently, with high economic efficiency and saving working hours. The mud skin cleaning efficiency is high and the effect is good.

[0056] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0057] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0058] The present invention has the following advantages:

[0059] 1) The arc-shaped end of the cleaning component is adapted to the inner wall shape of the steel casing, has strong integrity, is firmly fixed, is not easy to fall off and deform during the hole sweeping process, can be reused many times, improves the stability of the cleaning device, and effectively improves the cleaning effect.

[0060] 2) By modifying the existing hammer head, a fixed sleeve and a pad are permanently added to the blade foot of the hammer head. When it is necessary to clean the mud on the inner wall of the steel casing, it is only necessary to insert the arc-shaped steel plate and the steel chisel in the cleaning component into the appropriate position in the fixed sleeve and fix them with the positioning nut to carry out the mud cleaning operation. It can be applied to steel casings with different inner diameter specifications and has a wide range of applications.

[0061] 3) After the mud skin is cleaned, only the arc-shaped steel plate and steel chisel in the cleaning component need to be removed to avoid the influence of the arc-shaped end of the cleaning component on the punching operation, so that the mud skin cleaning device on the inner wall of the steel casing can be circulated into the normal punching process.

[0062] 4) The mud skin cleaning device on the inner wall of the steel casing has a simple structure, high strength, good durability, high economic effectiveness, saves man-hours, has high mud skin cleaning efficiency, and solves the problem of incomplete cleaning of the mud skin on the inner wall of the steel casing.

[0063] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A device for cleaning the inner wall of a steel casing, characterized in that: include: A hammer head (1) and a cleaning component matched with the hammer head blade foot, each cleaning component has an arc-shaped end, and the other end is arranged outside a hammer head blade foot of the hammer head, and can be adjusted to move away from or close to the hammer head blade foot so that the arc-shaped end is close to or away from the inner wall of the steel casing.

2. The device for cleaning the inner wall mud of a steel casing according to claim 1, characterized in that: Each of the cleaning components comprises: two adjusting components and an arc-shaped steel plate (2) straddling the top ends of the two adjusting components; wherein each adjusting component comprises: a fixing sleeve (3), two backing plates (4), two positioning nuts (5) and a steel chisel (6); the fixing sleeves (3) of the two adjusting components are respectively fixed to the two sides of the middle section of the blade foot of the hammer head; each fixing sleeve (3) is sleeved on the steel chisel (6) whose one end is fixed on the inner wall of the arc-shaped steel plate (2), and the steel chisel (6) can be The fixed sleeve (3) is moved in translation along the axis of the fixed sleeve (3) so that the arc-shaped steel plate (2) moves away from or approaches the inner wall of the steel casing; a pad (4) and a positioning nut (5) are symmetrically sleeved on the steel chisels (6) on both sides of the fixed sleeve (3); the pad (4) is vertically fixed to the end of the fixed sleeve (3) and is fixedly connected to the adjacent hammer blade foot; the positioning nuts (5) on both sides of the fixed sleeve (3) rotate relative to the fixed sleeve (3) to fix the relative position of the steel chisel (6) and the fixed sleeve (3).

3. The device for cleaning the inner wall mud of a steel casing according to claim 2, characterized in that: The arc-shaped steel plate (2) has a length of 1.3 m, a thickness of 20 mm, a height of 100 mm, and an arc of 75°.

4. The device for cleaning the inner wall mud of a steel casing according to claim 2, characterized in that: The steel chisel (6) is a finely rolled threaded steel bar with a diameter of 32 mm and a length of 435 mm.

5. The device for cleaning the inner wall mud of a steel casing according to claim 2, characterized in that: The fixing sleeve (3) has an inner diameter of 35 mm, a wall thickness of 10 mm and a length of 255 mm.

6. The device for cleaning the inner wall mud of a steel casing according to claim 2, characterized in that: The length of the pad (4) is 80 mm, the width is 80 mm, and the thickness is 10 mm; the inner diameter of the positioning nut (5) is 35 mm, the length of the outer hexagonal diagonal is 55 mm, and the height is 30 mm.

7. The device for cleaning the inner wall mud of a steel casing according to any one of claims 1 to 6, characterized in that: The hammer head (1) is a four-cornered hammer head, the number of the hammer head blade feet is four, and the number of the cleaning parts is four.

8. A construction method for a steel casing inner wall mud cleaning device, characterized in that: include: S1. According to the inner diameter of the steel casing to be cleaned of mud skin, the cleaning component is adjusted to be away from the hammer blade foot so that one end of the arc is close to the inner wall of the steel casing; S2. Pull up and down the drilling wire rope so that the hammer head (1) rotates under the torsion of the wire rope, so that the arc-shaped end of the cleaning component cleans the mud skin on the inner wall of the steel casing.

9. The construction method of the steel casing inner wall mud skin cleaning device according to claim 8, characterized in that: Step S1 includes the following steps: According to the inner diameter of the steel casing to be cleaned of mud skin, the length of the steel chisel (6) extending out of the fixed sleeve (3) is adjusted so that the arc-shaped steel plate (2) is at a predetermined distance from the inner wall of the steel casing.

10. The construction method of the steel casing inner wall mud skin cleaning device according to claim 9, characterized in that: The predetermined distance is 3cm-5cm.

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