A seepage-proof layer bedrock curtain grouting device

Abstract

This invention discloses a bedrock curtain grouting device and apparatus for impermeable layers, relating to the field of grouting equipment technology. It includes a mixing mechanism, a mounting frame, and a mixing tank mounted on top of the mounting frame, with a mixing shaft movably connected inside the mixing tank. A grouting mechanism, including a grouting pipe, is also included. Through the cooperation of the mixing mechanism, grouting mechanism, and drive mechanism, a motor drives the mixing shaft and crankshaft to rotate. The mixing shaft drives the mixing blades to rotate, rapidly producing cement. The crankshaft drives the piston rod and piston plate to reciprocate up and down, causing changes in air pressure inside the grouting pipe, thereby continuously extracting the prepared cement and preventing cement blockage inside the grouting pipe. A cleaning mechanism is provided, using a pump to draw water to wash the inner wall of the cylindrical chamber of the mixing tank. The rotation of the mixing shaft drives the scraper to rotate, thereby scraping off some of the cement adhering to the curved surface inside the truncated cone chamber, keeping the inside of the mixing tank clean.

Description

Technical Field

[0001] This invention relates to the field of grouting equipment technology, and in particular to a curtain grouting device for bedrock impermeable layers. Background Technology

[0002] Curtain grouting refers to the technique of injecting concrete grout into soil cracks or rock pores to form a continuous curtain with good water-resistant properties, significantly reducing seepage pressure and flow in water conservancy projects. Its application process involves three steps: 1) Drilling using a geological drilling rig to obtain curtain boreholes. 2) Injecting foundation materials into the boreholes using high-pressure grouting. In water conservancy projects, the foundation material is primarily cement grout; the high-pressure grouting enhances the permeability of the cement grout. 3) The cement grout completely solidifies, forming a cement grout column that is fully bonded to the soil layer, thus creating the waterproof curtain.

[0003] Its main functions are: to improve the integrity and homogeneity of the rock mass; to increase the compressive strength and elastic modulus of the rock mass; and to reduce the deformation and uneven settlement of the rock mass. However, existing grouting machines still have problems in practical engineering applications. Cement has poor fluidity and tends to accumulate at the bottom of the grouting machine tank and inside the grouting pipes, making it difficult to perform grouting work normally. After grouting, a large amount of residual cement adheres to the inner wall of the grouting machine tank and easily solidifies inside the tank. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the above-mentioned problem that cement, due to its poor fluidity, tends to accumulate at the bottom of the grouting machine tank and inside the grouting pipe, making it difficult to carry out grouting work normally, this invention is proposed.

[0006] Therefore, the objective of this invention is to provide a bedrock curtain grouting device for impermeable layers.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a bedrock curtain grouting device for an impermeable layer, comprising a mixing mechanism, including a mounting frame and a mixing tank disposed on the top of the mounting frame, wherein a mixing shaft is movably connected inside the mixing tank; a grouting mechanism, including a grouting pipe, wherein the cement inlet end of the grouting pipe is connected to the grout outlet of the mixing tank; and a driving mechanism, including a driving component and a transmission component connected at one end to the driving component and at the other end to the mixing shaft.

[0008] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer of the present invention, the mixing tank includes an inner tank and an outer tank covering the outside of the inner tank. A sound insulation layer is formed between the outer tank and the inner tank. The inner tank includes a cylindrical silo and a frustum silo fixed to the bottom of the cylindrical silo. A horizontally arranged support plate is fixed to the middle of the inner wall of the cylindrical silo. A feeding component is provided on the top surface of the support plate. A circular through hole is opened on the bottom surface of the frustum silo and a discharge pipe is fixedly connected thereto. The grout outlet is located at the bottom end of the discharge pipe.

[0009] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer described in this invention, the feeding assembly includes a vertical rod fixed to the middle of the support plate, a storage cylinder fixed to the top surface of the support plate and concentric with the vertical rod, and an adjusting rod with one end movably connected to the top of the vertical rod and the other end fixed with a handle. The top surface of the support plate has a through-hole for connecting the mixing tank and the storage cylinder. A rod sleeve is movably fitted onto the outer surface of the vertical rod. Three partitions arranged in a circumferential array are fixed onto the outer surface of the rod sleeve. The ends of the three partitions away from the circumferential rod sleeve abut against the inner wall of the storage cylinder.

[0010] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer described in this invention, the grouting pipe includes a grout discharge pipe arranged vertically on one side of the mounting frame, and a guide pipe with one end connected to the grout outlet and the other end connected to the grout inlet in the middle of the grout discharge pipe. The bottom end of the grout discharge pipe is detachably connected to a grouting nozzle, and the top end of the grout discharge pipe is provided with a grout guiding component.

[0011] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer described in this invention, the grouting assembly includes a piston plate slidably connected to the inner wall of the grout discharge pipe, and a crankshaft disposed above the grout discharge pipe. The two ends of the crankshaft are rotatably connected to the mounting frame through bearings. A piston rod is fixedly connected to the top surface of the piston plate. The assembly also includes a connecting rod with one end movably sleeved on the outer surface of the crankshaft and the other end hinged to the top of the piston rod through a pin.

[0012] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer of the present invention, wherein: the portion of the stirring shaft inside the unloading pipe is fitted with auger blades, the portion of the stirring shaft inside the frustum chamber is fitted with stirring blades, the driving component includes a driving shaft rotatably connected to the mounting frame via a bearing seat, one end of the driving shaft being fixedly connected to the output end of a motor, and the transmission component includes a first bevel gear fitted to the other end of the driving shaft, and a second bevel gear fitted to the bottom of the stirring shaft and meshing with the first bevel gear.

[0013] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer described in this invention, the transmission component further includes a first pulley sleeved on the outer surface of the drive shaft and a second pulley sleeved on the outer surface of the crankshaft, wherein the first pulley and the second pulley are connected by belt drive.

[0014] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer of the present invention, the grouting device further includes a cleaning mechanism for removing residual cement from the inner wall of the mixing tank. The cleaning mechanism includes an annular pipe disposed in the sound insulation layer and a scraping assembly disposed at the bottom of the inner cavity of the truncated cone. A plurality of diversion pipes arranged in a circumferential array are fixedly connected to the side of the annular pipe near the inner tank. The end of the diversion pipe away from the annular pipe passes through the inner tank and extends into the mixing chamber.

[0015] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer described in this invention, a three-way valve is provided on one side of the mixing tank. The inlet of the three-way valve is connected to the pump. The first outlet and the second outlet of the three-way valve are respectively connected to a first pipe and a second pipe. The end of the first pipe away from the three-way valve passes through the outer tank and the inner tank in sequence and is connected to the mixing chamber. The end of the second pipe away from the three-way valve passes through the outer tank and is connected to the annular pipe.

[0016] As a preferred embodiment of the bedrock curtain grouting device for the impermeable layer of the present invention, the scraping assembly includes a connecting ring sleeved on the outer surface of the stirring shaft, the connecting ring being disposed between the auger blade and the stirring blade, and three mounting rods arranged in an array fixed to the outer wall of the connecting ring, the mounting rods being provided with downwardly extending scrapers, and the scraping surface of the scraper abutting against the inner curved surface of the truncated cone.

[0017] The beneficial effects of this invention are as follows: Through the cooperation of the mixing mechanism, the grouting mechanism, and the driving mechanism, the mixing shaft and crankshaft are driven to rotate by the motor. The mixing shaft drives the mixing blades to rotate, so as to quickly produce cement. The crankshaft drives the piston rod and piston plate to move up and down, so as to cause the air pressure in the grouting pipe to rise and fall, thereby continuously extracting the prepared cement and avoiding cement blockage in the grouting pipe. By setting up a cleaning mechanism, water is drawn by a pump to wash the inner wall of the cylindrical chamber of the mixing tank. The rotation of the mixing shaft drives the scraper to rotate, thereby scraping off some of the cement adhering to the curved surface inside the truncated cone chamber, keeping the inside of the mixing tank clean. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is a schematic diagram of the overall structure of the bedrock curtain grouting device for the seepage-proof layer of the present invention. Figure 1 .

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0021] Figure 3 This is a cross-sectional view of the mixing tank in the bedrock curtain grouting device for the impermeable layer of the present invention.

[0022] Figure 4 This is a schematic diagram of the internal structure of the mixing tank in the bedrock curtain grouting device for the impermeable layer of the present invention.

[0023] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0024] Figure 6 This is a schematic diagram of the overall structure of the bedrock curtain grouting device for the seepage-proof layer of the present invention. Figure 2 .

[0025] Figure 7 for Figure 6 A magnified view of point C in the middle.

[0026] Figure 8 This is a schematic diagram of the mixing plate in the bedrock curtain grouting device for the seepage-proof layer of the present invention. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0031] Example 1

[0032] Reference Figure 1-7This is the first embodiment of the present invention, which provides a bedrock curtain grouting device for an impermeable layer, including a mixing mechanism 100, a grouting mechanism 200, and a driving mechanism 300. The mixing mechanism 100 includes a mounting frame 101 and a mixing tank 102 disposed on the top of the mounting frame 101. The mixing tank 102 is provided with a mixing chamber 102c for preparing cement. A circular through hole is opened in the middle of the bottom surface of the mixing tank 102 and a discharge pipe 102e is fixedly connected thereto. The bottom of the discharge pipe 102e is provided with a grout outlet 102f for discharging cement from the mixing chamber 102c. A mixing shaft 103 is movably connected inside the mixing tank 102. The part of the mixing shaft 103 inside the discharge pipe 102e is fitted with an auger blade 104. The outer surface of the mixing shaft 103 located at the bottom of the mixing chamber 102c is fitted with a mixing blade 105 for mixing raw materials.

[0033] The grouting mechanism 200 includes a grouting pipe 201, and the inlet end of the grouting pipe 201 is connected to the grout outlet 102f of the mixing tank 102. The outlet end of the grouting pipe 201 is detachably connected to a grouting nozzle 202.

[0034] The drive mechanism 300 includes a drive component 301 and a transmission component 302 connected at one end to the drive component 301 and at the other end to the stirring shaft 103.

[0035] Mounting bracket 101 includes a base 101a and a vertical square rod 101b fixed between the base 101a and the mixing tank 102. There are four vertical square rods 101b, which are evenly distributed on the bottom of the mixing tank 102. Casters 101c are movably connected to the four corners of the bottom surface of the base 101a.

[0036] The mixing blade 105 includes a positioning ring 105a sleeved on the outer surface of the mixing shaft 103, and mixing plates 105b fixed to the outer surface of the positioning ring 105a and arranged in a circumferential array. The surface of the mixing plate 105b has a cement flow port 105b-1. The mixing plate 105b is formed by twisting and splicing three square plates. The included angle between two adjacent square plates is 30° to 90°. In this embodiment, the included angle between two adjacent square plates is 60°, that is, the two adjacent square plates are tilted to the left and right sides by 30° respectively. So when mixing, after the cement comes into contact with the mixing plate, some cement flows from above the mixing plate 105b, and some cement flows downward through the flow port 105b-1 and is remixed after passing through the mixing plate 105b. At the same time, since the two adjacent square plates are twisted to each other, the movement pattern of cement flow in the mixing tank 102 is further expanded, and the mixing efficiency is improved.

[0037] The grouting pipe 201 includes a grout discharge pipe 201a arranged vertically on one side of the mounting frame 101, and a guide pipe 201b connected at one end to the grout outlet 102f and at the other end to the grout inlet in the middle of the grout discharge pipe 201a. A control valve is installed at the end of the guide pipe 201b near the grout outlet 102f to control the flow size and flow rate of cement. The grouting nozzle is detachably installed at the bottom of the grout discharge pipe 201a, and a grout guiding component 203 is provided at the top of the grout discharge pipe 201a.

[0038] The slurry guiding assembly 203 includes a piston plate 203a slidably connected to the inner wall of the slurry discharge pipe 201a, and a crankshaft 203c disposed above the slurry discharge pipe 201a. The two ends of the crankshaft 203c are rotatably connected to the mounting bracket 101 through bearings. A piston rod 203b is fixedly connected to the top surface of the piston plate 203a. The slurry guiding assembly 203 also includes a connecting rod 203d, one end of which is movably sleeved on the outer surface of the crankshaft 203c, and the other end of which is hinged to the top of the piston rod 203b through a pin.

[0039] The drive component 301 includes a drive shaft 301a rotatably connected to the mounting bracket 101 via a bearing housing. One end of the drive shaft 301a is fixedly connected to the output end of the motor 301b. The transmission component 302 includes a first bevel gear 302a sleeved on the other end of the drive shaft 301a and a second bevel gear 302b sleeved on the bottom of the stirring shaft 103 and meshing with the first bevel gear 302a. The transmission component 302 also includes a first pulley 302c sleeved on the outer surface of the drive shaft 301a and a second pulley 302d sleeved on the outer surface of the crankshaft 203c. The first pulley 302c and the second pulley 302d are connected by a belt 302e.

[0040] During use: Cement is prepared in the mixing tank 102. The motor 301b is started and rotates forward, driving the drive shaft 301a to rotate, which in turn drives the first bevel gear 302a and the first pulley 302c to rotate. The first bevel gear 302a meshes with the second bevel gear 302b, driving the mixing shaft 103 to rotate, which in turn drives the mixing blades 105 and the auger blades 104 to rotate. The auger blades 104 convey a portion of the cement entering the discharge pipe 102e upwards into the mixing tank, where the mixing blades 105 mix the raw materials to produce cement. The control valve at the end of the guide pipe 201b is opened, and the motor 301b is started to reverse. Cement is transported into the guide pipe 201b through the auger blades 104. Through the transmission action of the first pulley 302c, belt 302e and second pulley 302d, the crankshaft 203c is driven to rotate. This drives the piston rod 203b and piston plate 203a to move up and down reciprocally through the connecting rod 203d, introducing the cement in the guide pipe 201b into the discharge pipe 201a, and further spraying it out through the grouting nozzle 202 to complete the grouting work.

[0041] Example 2

[0042] Reference Figure 3 This is the second embodiment of the present invention. Based on the first embodiment, the second embodiment is further improved in that: the mixing tank 102 includes an inner tank 102a and an outer tank 102b with the same shape as the inner tank 102a and covering the outside of the inner tank 102a. A sound insulation layer 102d is formed between the outer tank 102b and the inner tank 102a to reduce the noise generated during cement preparation. The inner tank 102a includes a cylindrical silo 102a-1 and a frustum silo 102a-2 fixed to the bottom end of the cylindrical silo 102a-1. The discharge pipe 102e is fixed to a circular through hole on the bottom surface of the frustum silo 102a-2.

[0043] A horizontally arranged support plate 106 is fixed to the middle of the inner wall of the cylindrical silo 102a-1. A feeding assembly 107 is provided on the top surface of the support plate 106. The feeding assembly 107 includes a vertical rod 107a fixed to the middle of the support plate 106 and a storage cylinder 107b fixed to the top surface of the support plate 106 and concentric with the vertical rod 107a. The top surface of the support plate 106 has a through-hole 106a that connects the mixing tank 102 and the storage cylinder 107b. A rod sleeve 107c is movably sleeved on the outer surface of the rod sleeve 107c. Three partitions 107d arranged in a circumferential array are fixed to the outer surface of the rod sleeve 107c. The ends of the three partitions 107d away from the circumferential rod sleeve 107c abut against the inner wall of the storage cylinder 107b. The three partitions 107d divide the inner cavity of the storage cylinder 107b into three equal storage chambers.

[0044] An adjusting rod 107e is movably connected to the top of the upright 107a via a bearing. Multiple sets of L-shaped connecting rods 107e-1 are symmetrically arranged on both sides of the adjusting rod 107e and extend downward. The two opposing L-shaped connecting rods 107e-1 abut against the left and right side walls of the partition 107d located below the adjusting rod 107e.

[0045] A handle 107f is provided at the end of the adjusting rod 107e away from the upright rod 107a. The handle 107f includes a hand handle 107f-1 that is fixedly connected to the adjusting rod 107e perpendicularly, and a pressing rod 107f-2 that is hinged to the adjusting rod 107e at one end by a pin and connected to the hand handle 107f-1 at the other end by a spring 107f-3. An arc-shaped toothed block 107g is fixedly connected to the bottom end of the pressing rod 107f-2. The toothed surface of the arc-shaped toothed block 107g faces downward towards the storage cylinder 107b, and an outer toothed ring 107h that meshes with the toothed block is fixedly connected to the outer surface of the storage cylinder 107b.

[0046] During use: The spare dry cement is stored in the storage chamber divided equally by three partitions 107d. When it is necessary to add material, first, by gripping the hand lever 107f-1 and tightening the pressing lever 107f-2, the arc-shaped toothed block 107g is separated from the outer toothed ring 107h. Then, the hand lever 107f-1 and the adjusting lever 107e are rotated around the upright 107a. The L-shaped connecting rod 107e-1 drives the partition 107d to rotate around the upright 107a, thereby moving the dry cement between the partitions 107d. After the dry cement is pushed to the feed inlet 106a, it falls into the mixing tank 102, completing the material addition. After the material addition is completed, the handle 107f is released, so that the arc-shaped toothed block 107g and the outer toothed ring 107h are re-engaged, preventing the partition 107d from continuing to rotate.

[0047] The remaining structure is the same as that in Example 1.

[0048] Example 3

[0049] Reference Figure 3 , Figure 6 and Figure 7 This is the third embodiment of the present invention. Based on embodiment 2, the embodiment is further improved in that: the grouting device further includes a cleaning mechanism 400 for removing residual cement from the inner wall of the mixing tank 102. The cleaning mechanism 400 includes an annular pipe 401 disposed in the sound insulation layer 102d and a scraping assembly 406 disposed at the bottom of the inner cavity of the frustum 102a-2. A plurality of diversion pipes 402 arranged in a circumferential array are fixedly connected to the side of the annular pipe 401 near the inner tank 102a. The end of the diversion pipe 402 away from the annular pipe 401 passes through the inner tank 102a and extends into the mixing chamber 102c.

[0050] A three-way valve 403 is provided on one side of the mixing tank 102. The inlet of the three-way valve 403 is connected to the pump. The first outlet and the second outlet of the three-way valve 403 are respectively connected to the first pipe 404 and the second pipe 405. The end of the first pipe 404 away from the three-way valve 403 passes through the outer tank 102b and the inner tank 102a in sequence and is connected to the mixing chamber 102c. The end of the second pipe 405 away from the three-way valve 403 passes through the outer tank 102b and is connected to the annular pipe 401.

[0051] The scraping assembly 406 includes a connecting ring 406a sleeved on the outer surface of the stirring shaft 103. The connecting ring 406a is disposed between the auger blade 104 and the stirring blade 105. Three mounting rods 406b arranged in an array are fixed to the outer wall of the connecting ring 406a. The center line of the mounting rods 406b is arranged parallel to the inclined surface of the inner wall of the frustum 102a-2. A scraper 406c extending downward is provided on the mounting rods 406b. The scraping surface of the scraper 406c abuts against the curved surface of the inner cavity of the frustum 102a-2.

[0052] During use: The pump's inlet is connected to a water source. The pump draws water and sends it through the first pipe 404 to the mixing tank 102 to mix with dry cement, thus producing cement. After grouting is completed, the first outlet of the three-way valve 403 is closed, and the second outlet is opened. The water source is sent through the second pipe 405 to the annular pipe 401. The water flows in the annular pipe 401 and is sprayed out through the diversion pipe 402 to wash the inner wall of the cylindrical silo 102a-1. The cement adhering to the inner wall of the cylindrical silo 102a-1 is washed off. At the same time, the rotation of the mixing shaft 103 drives the connecting ring 406a to rotate, which in turn drives the mounting rod 406b and scraper 406c to rotate, thereby scraping off some of the cement adhering to the inner curved surface of the truncated cone silo 102a-2, keeping the inside of the mixing tank 102 clean.

[0053] The remaining structure is the same as that in Example 2.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A curtain grouting device for bedrock impermeable layers, characterized in that: include, The stirring mechanism (100) includes a mounting frame (101) and a stirring tank (102) disposed on the top of the mounting frame (101), wherein a stirring shaft (103) is movably connected inside the stirring tank (102). The grouting mechanism (200) includes a grouting pipe (201), the cement inlet end of which is connected to the grout outlet (102f) of the mixing tank (102); and, The drive mechanism (300) includes a drive member (301) and a transmission member (302) connected at one end to the drive member (301) and at the other end to the stirring shaft (103). The mixing tank (102) includes an inner tank (102a) and an outer tank (102b) covering the outside of the inner tank (102a). A sound insulation layer (102d) is formed between the outer tank (102b) and the inner tank (102a). The inner tank (102a) includes a cylindrical silo (102a-1) and a frustum silo (102a-2) fixed to the bottom of the cylindrical silo (102a-1). A horizontally arranged support plate (106) is fixed to the middle of the inner wall of the cylindrical silo (102a-1). A feeding assembly (107) is provided on the top surface of the support plate (106). A circular through hole is opened on the bottom surface of the frustum silo (102a-2) and a discharge pipe (102e) is fixed to it. The slurry outlet (102f) is located at the bottom end of the discharge pipe (102e). The grouting pipe (201) includes a grout discharge pipe (201a) arranged vertically on one side of the mounting frame (101), and a guide pipe (201b) with one end connected to the grout outlet (102f) and the other end connected to the grout inlet in the middle of the grout discharge pipe (201a). The bottom end of the grout discharge pipe (201a) is detachably connected to a grouting nozzle, and the top end of the grout discharge pipe (201a) is provided with a grout guiding assembly (203). The slurry guiding assembly (203) includes a piston plate (203a) slidably connected to the inner wall of the slurry discharge pipe (201a), and a crankshaft (203c) disposed above the slurry discharge pipe (201a). The two ends of the crankshaft (203c) are rotatably connected to the mounting bracket (101) through bearings. A piston rod (203b) is fixedly connected to the top surface of the piston plate (203a). The assembly also includes a connecting rod (203d) with one end movably sleeved on the outer surface of the crankshaft (203c) and the other end hinged to the top of the piston rod (203b) through a pin. The grouting device also includes a cleaning mechanism (400) for removing residual cement from the inner wall of the mixing tank (102). The cleaning mechanism (400) includes an annular pipe (401) disposed in the sound insulation layer (102d) and a scraper assembly (406) disposed at the bottom of the inner cavity of the frustum chamber (102a-2). The annular pipe (401) is fixed to a plurality of diversion pipes (402) arranged in a circumferential array on the side near the inner tank (102a). The end of the diversion pipe (402) away from the annular pipe (401) passes through the inner tank (102a) and extends into the mixing chamber (102c). The scraping assembly (406) includes a connecting ring (406a) sleeved on the outer surface of the stirring shaft (103). The connecting ring (406a) is disposed between the auger blade (104) and the stirring blade (105). Three mounting rods (406b) arranged in an array are fixed to the outer wall of the connecting ring (406a). A scraper (406c) extending downward is provided on the mounting rod (406b). The scraping surface of the scraper (406c) abuts against the inner curved surface of the frustum chamber (102a-2).

2. The impermeable layer bedrock curtain grouting apparatus according to claim 1, characterized by: The feeding assembly (107) includes a vertical rod (107a) fixed to the middle of the pallet (106), a storage cylinder (107b) fixed to the top surface of the pallet (106) and concentric with the vertical rod (107a), and an adjusting rod (107e) with one end movably connected to the top of the vertical rod (107a) and the other end fixedly connected to a handle (107f). The top surface of the pallet (106) is provided with a feed inlet (106a) that connects the mixing tank (102) and the storage cylinder (107b). The outer surface of the vertical rod (107a) is movably fitted with a rod sleeve (107c). The outer surface of the rod sleeve (107c) is fixedly fitted with three partitions (107d) arranged in a circumferential array. The ends of the three partitions (107d) away from the circumferential rod sleeve (107c) are all in contact with the inner wall of the storage cylinder (107b).

3. The impermeable layer bedrock curtain grouting apparatus according to claim 2, characterized by: The portion of the stirring shaft (103) inside the discharge pipe (102e) is fitted with auger blades (104), and the portion of the stirring shaft (103) inside the frustum chamber (102a-2) is fitted with stirring blades (105). The driving component (301) includes a driving shaft (301a) rotatably connected to the mounting bracket (101) via a bearing seat. One end of the driving shaft (301a) is fixedly connected to the output end of the motor (301b). The transmission component (302) includes a first bevel gear (302a) fitted to the other end of the driving shaft (301a) and a second bevel gear (302b) fitted to the bottom of the stirring shaft (103) and meshing with the first bevel gear (302a).

4. The impermeable layer bedrock curtain grouting apparatus according to claim 3, characterized by: The transmission component (302) further includes a first pulley (302c) sleeved on the outer surface of the drive shaft (301a) and a second pulley (302d) sleeved on the outer surface of the crankshaft (203c). The first pulley (302c) and the second pulley (302d) are connected by a belt (302e).

5. The impermeable layer bedrock curtain grouting apparatus according to claim 4, characterized by: A three-way valve (403) is provided on one side of the mixing tank (102). The inlet of the three-way valve (403) is connected to the pump. The first outlet and the second outlet of the three-way valve (403) are respectively connected to a first pipe (404) and a second pipe (405). The end of the first pipe (404) away from the three-way valve (403) passes through the outer tank (102b) and the inner tank (102a) in sequence and is connected to the mixing chamber (102c). The end of the second pipe (405) away from the three-way valve (403) passes through the outer tank (102b) and is connected to the annular pipe (401).

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