While-drilling movable type four-foot stool for curtain grouting

Abstract

The utility model discloses a curtain grouting while-drilling movable type quadripod, which belongs to the technical field of grouting drilling construction and comprises a machine table assembly, and the quadripod assembly comprises two vertical supporting steel pipes symmetrically fixed at the drilling end of the machine table piece and two inclined supporting steel pipes symmetrically fixed at the tail end of the machine table piece. The top ends of the inclined supporting steel pipes and the top ends of the vertical supporting steel pipes on the adjacent sides are hinged together, the top ends of the two vertical supporting steel pipes are close to each other, and a pulley is rotationally installed at the top ends of the two vertical supporting steel pipes. A stable anti-shaking assembly is further movably connected between the inclined supporting steel pipe and the vertical supporting steel pipe, and the stable anti-shaking assembly is fixedly connected with a drill rod of the machine table piece. According to the utility model, the stress can be uniformly distributed, the stability and firmness of equipment can be kept even under complex geological conditions or heavy load conditions, and the equipment damage caused by non-uniform stress is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to grouting drilling construction technical field, especially is curtain grouting while drilling mobile four -legged frame. BACKGROUND

[0002] Grouting drilling construction is an indispensable means for stratum foundation treatment in water conservancy and hydropower engineering, deep hole curtain grouting is an important foundation treatment technology for enhancing foundation anti-seepage, filling cracks and pores in rock and soil, preventing foundation seepage, improving rock and soil integrity, strength and stiffness, with the continuous progress of science and technology, water conservancy and hydropower engineering construction standard is also strengthened, the difficulty of deep hole curtain grouting increases, in order to prevent foundation seepage, form water blocking curtain, the drilling precision of curtain grouting hole needs to be ensured, so that the water blocking curtain formed by curtain grouting can block the circulation of underground water, increase the strength of foundation and improve the integrity of rock and soil.

[0003] Deep hole curtain grouting generally adopts geological drilling machine for drilling construction, since the maximum depth of super deep hole curtain grouting is 224 meters, the conventional drilling machine support or drill rod lifting device is prone to collapse, deformation and safety accidents due to the heavy weight of drill rod, especially in order to avoid the collapse of conventional drilling machine support caused by the self weight of drill rod during super deep hole curtain grouting drilling construction, safety accidents occur, which cannot ensure the safety and stability of drilling construction. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing curtain grouting while drilling mobile four -legged frame to solve the problems in the background art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: curtain grouting while drilling mobile four -legged frame, including machine table assembly, the machine table assembly includes machine table support and machine table part arranged on the machine table support, four -legged frame assembly is arranged on the machine table assembly, the four -legged frame assembly includes two vertical support steel pipes fixedly arranged on the drilling end of the machine table part and two inclined support steel pipes fixedly arranged on the tail end of the machine table part, the top ends of the inclined support steel pipe and the vertical support steel pipe on the adjacent side are hinged together, the top ends of the two vertical support steel pipes are arranged close to each other and a pulley is rotatably installed at the top ends, a steel wire rope is arranged on the pulley with an included angle, one end of the steel wire rope is connected with the fixed end portion on the machine table part, the end of the steel wire rope away from the fixed end portion is connected with a lifting device, a stable anti-shaking assembly is further movably connected between the inclined support steel pipe and the vertical support steel pipe, and the stable anti-shaking assembly is fixedly connected with the drill rod of the machine table part.

[0006] Preferably, the pulley is rotatably installed between the top ends of the two vertical support steel pipes through a steel shaft.

[0007] Preferably, the outer wall of each vertical supporting steel pipe is welded with a steel lug, and the top end of the inclined supporting steel pipe is hingedly connected to the steel lug of the adjacent vertical supporting steel pipe on one side by means of a bolt.

[0008] Preferably, the outer wall of each vertical supporting steel pipe is welded with a steel lug, and the top end of the inclined supporting steel pipe is hingedly connected to the steel lug of the adjacent vertical supporting steel pipe on one side by means of a bolt.

[0009] Preferably, the bottom end of each vertical supporting steel pipe is fixedly connected to the adjacent fixed steel plate by means of a fixing bolt.

[0010] Preferably, the stable anti-shaking assembly comprises two symmetrically arranged first positioning collar rings, two symmetrically arranged second positioning collar rings, and a telescopic supporting part telescopically connected between the two first positioning collar rings and the two second positioning collar rings.

[0011] Preferably, each telescopic supporting part comprises a fixed connecting rod and an extension connecting rod symmetrically telescopically connected at the two ends of the fixed connecting rod, and the end of the extension connecting rod away from the fixed connecting rod is welded with the first positioning collar ring and the second positioning collar ring, respectively.

[0012] Preferably, the inner wall of the fixed connecting rod between the two second positioning collar rings is welded with a fixed shaft, the free end of the fixed shaft is welded with a fixed connecting disc, the bottom surface of the fixed connecting disc is welded with a connecting column, and the connecting column is fixedly connected with the upper part of the drill pipe.

[0013] Preferably, a buffer telescopic part is arranged between the inner wall of the fixed connecting rod between the two first positioning collar rings and the fixed connecting disc, and the buffer telescopic part comprises a fixed sleeve welded to the outer wall of the fixed connecting disc, a telescopic inserting rod welded to the inner wall of the fixed connecting rod, and a hydraulic damper arranged in the fixed sleeve.

[0014] Preferably, the end of the fixed sleeve away from the fixed connecting disc is integrally formed with an external thread pipe, the telescopic inserting rod is sleeved with a threaded end cover, the threaded end cover is threadedly connected with the external thread pipe, the end of the telescopic inserting rod inserted into the fixed sleeve is welded with a limiting disc, the damping end of the hydraulic damper is fixedly provided with a rubber buffer disc, and the rubber buffer disc and the limiting disc are elastically abutted together.

[0015] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0016] The curtain grouting while-drilling movable four-leg frame is composed of two inclined support steel pipes and two vertical support steel pipes, which are connected through hinges and form a stable triangular structure. This structure can uniformly distribute the stress, ensuring the stability of the entire device. Even under complex geological conditions or heavy load conditions, the stability and firmness of the equipment can be maintained, avoiding equipment damage caused by uneven stress.

[0017] Through the design of the stable anti-shaking assembly, the assembly is lifted by the lifted drill pipe and moves up and down along the inclined support steel pipe and the vertical support steel pipe during the lifting of the drill pipe. This not only prevents the drill pipe from shaking, but also provides additional positioning support, reducing operational errors and potential safety hazards caused by drill pipe shaking, ensuring the safety of the operator. The stable anti-shaking assembly rises and falls with the drill pipe during the lifting of the drill pipe, ensuring that the drill pipe is always accurately positioned during the entire movement, preventing mechanical vibration caused by shaking, reducing the impact of mechanical vibration on the equipment, prolonging the service life of the equipment, and improving the accuracy and reliability of the operation.

[0018] The pulley is installed between the top ends of the two vertical support steel pipes through a steel shaft, and the steel wire rope is guided through the pulley. The lifting device is used to lift the drill pipe. The pulley system reduces friction, making the lifting process smoother and more efficient, improving lifting speed and accuracy, and reducing energy loss caused by friction, thereby improving overall work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application. For those skilled in the art, other drawings can also be obtained without creative labor.

[0020] Figure 1 It is a structural schematic diagram of the present application;

[0021] Figure 2 It is a structural schematic diagram of the connection state of the shaft of the present application;

[0022] Figure 3 It is a connection structure schematic diagram of the stable anti-shaking assembly of the present application;

[0023] Figure 4 It is a connection structure schematic diagram of the fixed connection disc of the present application;

[0024] Figure 5 It is a structural schematic diagram of the disassembly state of the fixed sleeve and the telescopic insertion rod of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] In the figure: 1, machine table assembly; 2, four-legged frame assembly; 3, land; 4, machine table support; 5, machine table part; 6, fixed steel plate; 7, inclined support steel pipe; 8, vertical support steel pipe; 9, pulley; 10, steel shaft; 11, steel ear; 12, bolt; 13, drilling machine faucet; 14, steel wire rope; 15, lifter; 16, fixed end part; 17, fixed bolt; 18, connecting shaft; 19, stable anti-shaking assembly; 20, first positioning collar; 21, extended connecting rod; 22, second positioning collar; 23, fixed connecting rod; 24, fixed shaft; 25, fixed connecting disc; 26, fixed sleeve; 27, telescopic insertion rod; 28, connecting upright; 29, external threaded pipe; 30, threaded end cover; 31, limiting disc; 32, hydraulic damper; 33, rubber buffer disc. DETAILED DESCRIPTION

[0027] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail to avoid obscuring the present application.

[0028] Unless specifically defined otherwise, the terms "upper," "lower," "right," "left," "forward," "backward," "inward," and "outward" used herein refer to the orientation of the figures as shown in the drawings, and are used in this description for convenience.

[0029] The present embodiment provides a method for drilling a hole in the ground, comprising the steps of: Figures 1 to 5The curtain grouting while drilling mobile four-leg shown, including machine platform assembly 1, machine platform assembly 1 including machine platform support 4 and set on machine platform support 4 machine platform piece 5, machine platform support 4 is fixed on land 3, machine platform piece 5's drill rod above has a drilling rig water faucet 13, machine platform assembly 1 is provided with four-leg assembly 2, four-leg assembly 2 includes two vertical support steel pipes 8 fixedly on the drilling end of machine platform piece 5 and two inclined support steel pipes 7 fixedly on the tail end of machine platform piece 5, the top of adjacent one side inclined support steel pipe 7 and vertical support steel pipe 8 are hinged together, the top of two vertical support steel pipes 8 is close to each other and is rotatably installed with a pulley 9 on the top, a steel wire rope 14 is arranged at an angle on the pulley 9, one end of the steel wire rope 14 is connected with the fixed end 16 on the machine platform piece 5, the end of the steel wire rope 14 away from the fixed end 16 is connected with a lifting device 15, the inclined support steel pipe 7 and the vertical support steel pipe 8 are further movably connected with a stable anti-shaking assembly 19, and the stable anti-shaking assembly 19 is fixedly connected with the drill rod of the machine platform piece 5. When the lifting device 15 lifts the drill rod through the steel wire rope 14 and the fixed end 16, the stable anti-shaking assembly 19 is lifted by the lifted drill rod, and the stable anti-shaking assembly 19 can be lifted along with the lifting of the drill rod on the inclined support steel pipe 7 and the vertical support steel pipe 8, so that the stable anti-shaking assembly 19 positions the drill rod during lifting to prevent shaking and improves stability. When drilling, the steel wire rope passes through the upper pulley, and the lifting device of the drilling rig is used to lift the drill rod. When lifting the drill rod, the four-leg is uniformly stressed, safe and stable, the pulley 9 and the steel wire rope 14 are used, the drill rod is lifted by the lifting device 15, and the stable anti-shaking assembly 19 provides stability and prevents shaking, provides a stable structure, ensures that the drill rod does not shake during lifting, and improves the safety and efficiency of operation.

[0030] In the embodiment, the steel shaft 10 allows the pulley 9 to rotate freely, reduces friction, enables the steel wire rope 14 to be smoothly pulled through the pulley, reduces the friction between the pulley 9 and the vertical support steel pipe 8, improves the working efficiency of the steel wire rope 14, and prolongs the service life of the equipment. The pulley 9 is rotatably installed between the top ends of the two vertical support steel pipes 8 through the steel shaft 10.

[0031] In the embodiment, the combination of the bolt 12 and the steel ear 11 provides an adjustable hinge point, so that the inclined support steel pipe 7 can be close to the vertical support steel pipe 8 as needed, the outer wall of each vertical support steel pipe 8 is welded with a steel ear 11, and the top end of the inclined support steel pipe 7 is hinged on the steel ear 11 of the adjacent vertical support steel pipe 8 through the bolt 12. The top end of the inclined support steel pipe 7 is hinged on the upper part of the vertical support steel pipe 8.

[0032] In this embodiment, the fixed steel plate 6 and the fixed bolt 17 ensure that the vertical support steel pipe 8 is firmly fixed on the machine base 4, enhancing the stability of the overall structure, improving the stability of the entire system, preventing loosening caused by vibration or external force, increasing safety, and the drilling end of the machine base 4 is welded with a fixed steel plate 6 on both ends of the outer wall, and the bottom end of each vertical support steel pipe 8 is fixedly connected with the adjacent fixed steel plate 6 through the fixed bolt 17.

[0033] In this embodiment, the bottom ends of the two inclined support steel pipes 7 are connected inside the machine part 5 through the connecting shaft 18. The connecting shaft 18 connects the bottoms of the two inclined support steel pipes 7 together to form a unified whole, enhancing the rigidity of the structure and improving the rigidity and stability of the inclined support steel pipe 7, preventing deformation or damage when lifting heavy objects.

[0034] In this embodiment, the stable anti-shaking assembly 19 includes two symmetrically arranged first positioning collars 20, two symmetrically arranged second positioning collars 22, and a telescopic support component telescopically connected between the two first positioning collars 20 and the two second positioning collars 22. The first positioning collar 20 and the second positioning collar 22 are connected through the telescopic connecting component and can automatically adjust the position according to the lifting distance of the drill pipe, maintain the stability of the drill pipe, provide a dynamic adjustment function, ensure that the drill pipe can be effectively supported and positioned at any height, and prevent shaking.

[0035] In this embodiment, each telescopic support component includes a fixed connecting rod 23 and an extension connecting rod 21 telescopically inserted into the fixed connecting rod 23 at both ends, and the extension connecting rod 21 is welded to the first positioning collar 20 and the second positioning collar 22 at the end away from the fixed connecting rod 23. This allows the two first positioning collars 20 and the two second positioning collars 22 to move towards the fixed connecting rod 23 during lifting, as the upper parts of the two inclined support steel pipes 7 and the two vertical support steel pipes 8 tend to move towards the center (see Figure 2 As can be seen), so the two first positioning collars 20 and the two second positioning collars 22 are designed to be telescopically adjustable according to the size of the lifting distance, which not only does not hinder the movement of the drill pipe during lifting, but also stabilizes and positions the lifted drill pipe to prevent shaking. At the same time, the distance between the inclined support steel pipe 7 and the vertical support steel pipe 8 also tends to gradually approach from bottom to top (see Figure 2 As can be seen), so the structure between the first positioning collar 20 and the fixed connecting disc 25 is also designed to be telescopic to meet the lifting of the drill pipe. The telescopic support component allows the first positioning collar 20 and the second positioning collar 22 to telescope according to the height change of the drill pipe to adapt to different spacing requirements, providing a flexible telescopic mechanism to ensure that the movement of the drill pipe during lifting is not hindered, while maintaining good positioning and anti-shaking effect.

[0036] In this embodiment, the inner wall of the fixed connecting rod 23 between the two second positioning collars 22 is welded with a fixed shaft 24, the free end of the fixed shaft 24 is welded with a fixed connecting disc 25, the bottom surface of the fixed connecting disc 25 is welded with a connecting column 28, and the connecting column 28 is fixedly connected with the upper part of the drill pipe. When the drill pipe is lifted stably, positioning is performed to prevent shaking. The fixed shaft 24 and the fixed connecting disc 25 provide a firm connection point, so that the drill pipe is stably supported during lifting, the stability of the drill pipe during lifting is enhanced, and shaking and instability caused by uneven stress are reduced.

[0037] In this embodiment, a buffer expansion component is arranged between the inner wall of the fixed connecting rod 23 between the two first positioning collars 20 and the fixed connecting disc 25, the buffer expansion component includes a fixed sleeve 26 welded to the outer wall of the fixed connecting disc 25, an expansion plug 27 welded to the inner wall of the fixed connecting rod 23, and a hydraulic damper 32 arranged in the fixed sleeve 26. Through the relative movement between the expansion plug 27 and the fixed sleeve 26, combined with the action of the hydraulic damper 32, the buffer expansion component absorbs and alleviates mechanical vibration, provides good buffer damping function, reduces the influence of mechanical vibration on the equipment, and prolongs the service life of the equipment.

[0038] In this embodiment, an external threaded pipe 29 is integrally formed at one end of the fixed sleeve 26 away from the fixed connecting disc 25, a threaded end cover 30 is sleeved on the side of the expansion plug 27, the threaded end cover 30 is threadedly connected with the external threaded pipe 29, one end of the expansion plug 27 extending into the fixed sleeve 26 is welded with a limiting disc 31, a rubber buffer disc 33 is fixed to the damping end of the hydraulic damper 32, and the rubber buffer disc 33 and the limiting disc 31 elastically abut together. When the drill pipe is lifted, the upper part of the inclined support steel pipe 7 gradually approaches the vertical support steel pipe 8, so that the first positioning collar 20 on the inclined support steel pipe 7 drives the expansion plug 27 to abut against the hydraulic damper 32 by extending into the fixed sleeve 26, which not only helps to adjust the different intervals and improve the lifting stability of the drill pipe, but also improves the buffering effect under the action of the hydraulic damper 32 and the rubber buffer disc 33, and reduces the mechanical vibration caused by lifting. The combination of the external threaded pipe 29 and the threaded end cover 30 provides a detachable mode, and the hydraulic damper 32 and the rubber buffer disc 33 jointly act to further absorb and alleviate mechanical vibration, provide precise adjustment and strong buffer damping function, effectively reduce the influence of mechanical vibration on the equipment, and improve the reliability and service life of the equipment.

[0039] Working principle:

[0040] The curtain grouting while drilling mobile four-legged frame stably places the machine table assembly 1 on the land 3, the four-legged frame assembly 2 includes two inclined support steel pipes 7 and two vertical support steel pipes 8, which are symmetrically fixed to the tail end and the drilling end of the machine table part 5 respectively, the top end of the inclined support steel pipe 7 is hinged to the steel ear 11 of the adjacent vertical support steel pipe 8 through the bolt 12, forming a trend close to the vertical support steel pipe 8, at the top of the four-legged frame assembly 2, a pulley 9 is rotatably installed between the two vertical support steel pipes 8, the steel wire rope 14 is guided through the pulley, and one end is connected to the fixed end 16 on the machine table part 5, and the other end is connected to the lifter 15, the stable anti-shaking assembly 19 is movably connected between the inclined support steel pipe 7 and the vertical support steel pipe 8, and is fixedly connected with the drill pipe of the machine table part 5, for preventing the drill pipe from shaking during lifting.

[0041] When the drill pipe needs to be lifted, the lifter 15 of the drilling machine winch is started, and a lifting force is applied through the steel wire rope 14, the steel wire rope 14 passes through the pulley 9, so that the lifter 15 can smoothly lift the drill pipe, and during lifting, the stable anti-shaking assembly 19 is lifted by the lifted drill pipe and moves up and down along the inclined support steel pipe 7 and the vertical support steel pipe 8, ensuring the stability of the drill pipe during lifting and preventing shaking, the stable anti-shaking assembly 19 is composed of two first positioning collars 20, two second positioning collars 22 and telescopic connecting parts. These parts can move centripetally towards the fixed connecting rod 23 during the lifting of the drill pipe, adapt to the change of different intervals, the inner wall of the fixed connecting rod 23 between the second positioning collars 22 is welded with a fixed shaft 24, the free end of the fixed shaft 24 is welded with a fixed connecting disc 25, and the fixed connecting disc 25 is fixedly connected with the upper part of the drill pipe through a connecting column 28, further enhancing the stability and accurate positioning of the drill pipe during lifting.

[0042] A buffer telescopic part is arranged between the inner wall of the fixed connecting rod 23 between the first positioning collars 20 and the fixed connecting disc 25, including a fixed sleeve 26, a telescopic plug rod 27 and a hydraulic damper 32, when the drill pipe is lifted, the first positioning collar 20 on the inclined support steel pipe 7 drives the telescopic plug rod 27 to extend into the fixed sleeve 26 and abut against the hydraulic damper 32, thereby improving the buffering effect and reducing mechanical vibration caused by lifting.

[0043] The whole four-legged frame design considers uniform stress distribution, so that when the drill pipe is lifted, the overall stress of the four-legged frame is balanced, ensuring the safety and stability of the operation.

[0044] It has to be noted that, in the present document, the terms "comprising", "including", and "having" should be interpreted as specifying the presence of the stated features but not precluding the presence of one or more other features. It should also be noted that, in the present document, the term "or" should be interpreted as the logical or, i.e. requiring at least one of the presented options to be true.

[0045] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A curtain grouting while drilling mobile four-leg jack, comprising a machine table assembly (1), characterized in that: The machine platform assembly (1) comprises a machine platform support (4) and a machine platform component (5) arranged on the machine platform support (4), and a four-leg support assembly (2) is arranged on the machine platform assembly (1), the four-leg support assembly (2) comprises two vertical support steel pipes (8) symmetrically fixed to the drilling end of the machine platform component (5) and two inclined support steel pipes (7) symmetrically fixed to the tail end of the machine platform component (5), the top ends of the adjacent one side of the inclined support steel pipe (7) and the vertical support steel pipe (8) are hinged together, the top ends of the two vertical support steel pipes (8) are arranged close to each other and a pulley (9) is rotatably installed at the top end, a steel wire rope (14) is arranged at an angle on the pulley (9), one end of the steel wire rope (14) is connected together with a fixed end portion (16) on the machine platform component (5), the end of the steel wire rope (14) away from the fixed end portion (16) is connected with a lifting device (15), and a stable anti-shaking assembly (19) is movably connected between the inclined support steel pipe (7) and the vertical support steel pipe (8), and the stable anti-shaking assembly (19) is fixedly connected with the drill rod of the machine platform component (5).

2. The curtain grouting while drilling mobile spider of claim 1, wherein: The pulley (9) is rotatably installed between the top ends of the two vertical support steel pipes (8) through a steel shaft (10).

3. The curtain grouting while drilling mobile spider of claim 2, wherein: The outer wall of each vertical support steel pipe (8) is welded with a steel ear (11), and the top end of the inclined support steel pipe (7) is hinged on the steel ear (11) of the adjacent one side vertical support steel pipe (8) through a bolt (12).

4. The curtain grouting while drilling mobile spider of claim 3, wherein: The outer wall of the drilling end of the machine platform support (4) is welded with a fixed steel plate (6), and the bottom end of each vertical support steel pipe (8) is fixedly connected with the adjacent fixed steel plate (6) through a fixing bolt (17).

5. The curtain grouting while drilling mobile spider of claim 4, wherein: The bottom ends of the two inclined support steel pipes (7) are connected in the interior of the machine platform component (5) through a connecting shaft (18).

6. The curtain grouting while drilling mobile spider of claim 5, wherein: The stable anti-shaking assembly (19) comprises two first positioning sleeve rings (20) arranged symmetrically, two second positioning sleeve rings (22) arranged symmetrically, and telescopic supporting components telescopically connected between the two first positioning sleeve rings (20) and the two second positioning sleeve rings (22).

7. The curtain grouting while drilling mobile spider of claim 6, wherein: Each telescopic supporting component comprises a fixed connecting rod (23) and extension connecting rods (21) telescopically connected at the two ends of the fixed connecting rod (23), and the end of each extension connecting rod (21) away from the fixed connecting rod (23) is welded with the first positioning sleeve ring (20) and the second positioning sleeve ring (22) respectively.

8. The curtain grouting while drilling mobile spider of claim 7, wherein: The inner wall of the fixed connecting rod (23) between the two second positioning sleeve rings (22) is welded with a fixed shaft (24), the free end of the fixed shaft (24) is welded with a fixed connecting disc (25), the bottom surface of the fixed connecting disc (25) is welded with a connecting column (28), and the connecting column (28) is fixedly connected with the upper part of the drill rod.

9. The curtain grouting while drilling mobile spider of claim 8, wherein: A buffer expansion component is arranged between the inner wall of the fixed connecting rod (23) between the two first positioning collars (20) and the fixed connecting disc (25), which comprises a fixed sleeve (26) welded to the outer wall of the fixed connecting disc (25), an expansion plug (27) welded to the inner wall of the fixed connecting rod (23), and a hydraulic damper (32) arranged in the fixed sleeve (26).

10. The curtain grouting while drilling mobile spider of claim 9, wherein: An external threaded tube (29) is integrally formed at one end of the fixed sleeve (26) away from the fixed connecting disc (25), a threaded end cover (30) is sleeved on the side of the expansion plug (27), the threaded end cover (30) is screwed with the external threaded tube (29), one end of the expansion plug (27) extending into the fixed sleeve (26) is welded with a limiting disc (31), and a rubber buffer disc (33) is fixed to the damping end of the hydraulic damper (32), and the rubber buffer disc (33) and the limiting disc (31) are elastically abutted together.

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