A curtain grouting device for tunnel waterproofing

Abstract

This invention relates to the field of tunnel construction technology, specifically to a curtain grouting device for tunnel water sealing. It mainly includes a body, and further includes: an adjustment mechanism located on one side of the body, and a fixing mechanism located on one side of the body. By tightening the nut, the position of the adjustment block is controlled and fixed. The adjustment block, through the adjustment groove, drives the adjustment column and fixing strip to rotate at a certain angle, which in turn drives the fixing block and arc plate to rotate at a certain angle. This loosens the hose, causing the connecting sleeve and fixing rod to rotate at a certain angle. The fixing rod moves into the inner wall of the arc plate, and the fixing rod drives the cylinder to move into the inner wall of the installation groove. The locking column engages with the locking groove to fix the cylinder, further fixing the connecting sleeve, so that a certain angle is formed between the connecting sleeve and the fixing sleeve. A section of the hose connected to the grouting head is in an arc-shaped bend, ensuring that the connection between the hose and the grouting head does not bend at a large angle and be damaged, allowing the grout to flow smoothly through the inner wall of the hose, thereby improving the efficiency and quality of grouting.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to a curtain grouting device for tunnel waterproofing. Background Technology

[0002] During the construction of deep-buried tunnels, it is difficult to accurately grasp the geological conditions along the tunnel route, leading to a sharp increase in the frequency of geological disasters encountered during construction. In particular, fault fracture zones and water inrush problems in tunnels often cause project delays. Therefore, it is advisable to first use advanced drilling to predict the grading of the surrounding rock ahead of the tunnel face and parameters such as seepage volume, water pressure, and water temperature. Then, different grouting materials should be selected and grouting should be carried out in a timely manner to reduce the risk of geological disasters.

[0003] During tunnel water-stopping grouting, after drilling, the grouting pipe is installed inside the hole. After connecting the grouting head to the grouting pipe, the grouting equipment injects grout from the grouting head into the grouting pipe and the hole through a hose. Since the hose and the grouting head are directly connected, when the grouting head is grouting at different parts of the tunnel wall, the hose will sag due to the gravity of the hose and the grout inside the hose. This causes a large angle of bending at the connection between the hose and the grouting head, which reduces the amount of grout flowing through the inner wall of the hose and easily damages the hose, thus affecting the efficiency and quality of grouting. Summary of the Invention

[0004] The purpose of this invention is to provide a curtain grouting device for tunnel waterproofing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A curtain grouting device for tunnel waterproofing includes: a body, an inlet pipe and an outlet pipe installed on the side of the body, an grouting head fixedly installed at one end of the outlet pipe via a flexible hose, and a flange fixedly installed on the outer wall of the grouting head; and further includes:

[0007] The adjustment mechanism is located on one side of the machine body. The adjustment mechanism includes a fixed sleeve that is fixedly installed on the outer wall of the grouting head. An arc plate and a fixed rod are provided on one side of the fixed sleeve. A connecting sleeve is fixedly installed at one end of the fixed rod. The adjustment mechanism prevents the hose from breaking.

[0008] The fixing mechanism is located on one side of the machine body. The fixing mechanism includes a compression block located inside the connecting sleeve. Two grooves are opened on the inner wall of the connecting sleeve. The fixing mechanism is used to fix the hose.

[0009] Preferably, two hinge blocks are fixedly installed on the side of the fixed sleeve, and two fixing rods are provided. One end of each fixing rod is hinged to the inner wall of the two hinge blocks respectively. The inner wall of the connecting sleeve is slidably connected to the outer wall of the hose. Multiple arc plates are provided, and an arc rod is slidably installed through the side of the arc plate and the outer wall of the fixing rod.

[0010] Preferably, the two ends of the arc-shaped rod are fixedly connected to the side of the fixed sleeve, a fixed block is fixedly installed on the side of the arc-shaped plate, a support frame is fixedly installed on the outer wall of the fixed sleeve, a fixed plate is fixedly installed on the side of the support frame, an arc-shaped groove is opened through the side of the fixed plate, the inner wall of the arc-shaped groove is slidably connected to the side of the fixed block, and an arc-shaped rod is slidably installed through the side of the fixed block, with the two ends of the arc-shaped rod fixedly connected to the inner wall of the arc-shaped groove.

[0011] Preferably, a fixing column is fixedly installed on the side of the fixing plate, and two rotating sleeves are rotatably installed on the outer wall of the fixing column through a bearing seat. A fixing strip is fixedly installed on the outer wall of the rotating sleeve, and the other end of the fixing strip is fixedly connected to the side of the fixing block.

[0012] Preferably, an adjusting column is fixedly installed on the side of the fixing strip, a T-shaped groove is opened on the side of the fixing plate, a T-shaped block is slidably installed on the inner wall of the T-shaped groove, a threaded column is fixedly installed on the side of the T-shaped block, an adjusting block is fixedly installed on the threaded column by a nut, an adjusting groove is opened through the side of the adjusting block, and the inner wall of the adjusting groove is slidably connected to the outer wall of the adjusting column.

[0013] Preferably, connecting rods are fixedly installed on the outer walls of the two arc-shaped plates, and cylinders are fixedly installed on the sides of the fixing rods. The outer walls of the cylinders are provided with slots, and the sides of the arc-shaped plates are provided with mounting grooves. The outer walls of the mounting grooves are slidably connected to the outer walls of the cylinders.

[0014] Preferably, the arc-shaped plate has a movable groove inside, a movable sleeve is slidably installed on the inner wall of the movable groove, a locking post is slidably installed through the inner wall of the mounting groove, the outer wall of the locking post is fixedly connected to the inner wall of the movable sleeve, the locking post is engaged with the locking groove, and an elastic element is slidably installed on the outer wall of the locking post. The two ends of the elastic element are fixedly connected to the side of the movable sleeve and the inner wall of one side of the movable groove.

[0015] Preferably, the side of the extrusion block is slidably connected to the inner wall of the groove, the outer wall of the fixing rod is provided with a sliding groove, and a sliding sleeve and an elastic element II are slidably installed on the inner wall of the sliding groove. The two ends of the elastic element II are fixedly connected to the side of the sliding sleeve and the inner wall of one side of the sliding groove.

[0016] Preferably, a limiting rod is slidably installed through the side of the sliding sleeve, and the two ends of the limiting rod are fixedly connected to the inner walls of the two sides of the sliding groove. Two wedge blocks are fixedly installed on the outer wall of the sliding sleeve, and the sides of the wedge blocks are slidably connected to the sides of the arc plate.

[0017] Preferably, a connecting groove is provided through the side of the extrusion block, and a support strip is fixedly installed on the side of the sliding sleeve. One end of the support strip slides through the inner wall of the sliding groove and the side of the connecting sleeve and extends into the interior of the connecting groove. Inclined grooves are provided on the upper and lower inner walls of the connecting groove, and a control column is fixedly installed through the top surface of the support strip. The outer walls of both ends of the control column are slidably connected to the inner wall of the inclined groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention uses a nut to control the position of the adjusting block and then fix it. The adjusting block drives the adjusting column and fixing strip to rotate a certain angle through the adjusting groove, which in turn drives the fixing block and arc plate to rotate a certain angle. This loosens the hose, causing the connecting sleeve and fixing rod to rotate a certain angle. The fixing rod moves into the inner wall of the arc plate, and the fixing rod drives the cylinder to move into the inner wall of the mounting groove. The locking column engages with the locking groove to fix the cylinder, further fixing the connecting sleeve. This creates a certain angle between the connecting sleeve and the fixing sleeve, and a section of the hose is in an arc-shaped bend at the connection between the hose and the grouting head. This ensures that the connection between the hose and the grouting head will not bend at a large angle and be damaged, allowing the grout to flow smoothly through the inner wall of the hose, thereby improving the efficiency and quality of grouting.

[0020] After the fixed rod is moved into the inner wall of the arc-shaped plate, the side of the arc-shaped plate squeezes the wedge block to move. The wedge block drives the sliding sleeve to move, the sliding sleeve drives the support bar to move, the support bar drives the control column to move, and the control column cooperates with the inclined groove to drive the squeezing block to move. The squeezing blocks on both sides squeeze and fix the outer wall of the hose, making the hose less prone to slippage and the connection between the hose and the grouting head less prone to shaking and damage, thereby improving the quality and stability of grouting. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the flexible tube of the present invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is an exploded view of the three-dimensional structure of the fixing plate of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged view at point B in the middle;

[0026] Figure 6 This is an exploded view of the three-dimensional structure of the sliding sleeve of the present invention;

[0027] Figure 7 This is a schematic cross-sectional view of the arc-shaped plate three-dimensional structure of the present invention;

[0028] Figure 8 This is a schematic cross-sectional view of the three-dimensional structure of the connecting sleeve of the present invention;

[0029] Figure 9 This is a cross-sectional schematic diagram of the three-dimensional structure of the extrusion block of the present invention.

[0030] In the picture:

[0031] 1. Machine body; 101. Feed pipe; 102. Discharge pipe; 103. Hose; 104. Grouting head; 105. Flange;

[0032] 2. Adjustment mechanism; 201. Fixed sleeve; 202. Hinge block; 203. Fixed rod; 204. Connecting sleeve; 205. Arc rod one; 206. Arc plate; 207. Fixed block; 208. Support frame; 209. Fixed plate; 210. Arc groove; 211. Arc rod two; 212. Fixed column; 213. Rotating sleeve; 214. Fixed strip; 215. Adjusting column; 216. T-slot; 217. T-block; 218. Threaded column; 219. Adjusting block; 220. Adjusting groove; 221. Nut; 222. Cylindrical part; 223. Mounting groove; 224. Slot; 225. Moving groove; 226. Moving sleeve; 227. Slot; 228. Elastic element one; 229. Connecting rod;

[0033] 3. Fixing mechanism; 301. Groove; 302. Extrusion block; 303. Slide groove; 304. Sliding sleeve; 305. Wedge block; 306. Limiting rod; 307. Elastic element two; 308. Support bar; 309. Control column; 310. Connecting groove; 311. Inclined groove. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0036] like Figures 1-9 As shown, this application provides a curtain grouting device for tunnel water sealing, including: a body 1, with an inlet pipe 101 and an outlet pipe 102 installed on the side of the body 1, and an grouting head 104 fixedly installed at one end of the outlet pipe 102 via a flexible hose 103, and a flange 105 fixedly installed on the outer wall of the grouting head 104, and further including:

[0037] Adjustment mechanism 2 is located on one side of the machine body 1. Adjustment mechanism 2 includes a fixed sleeve 201 fixedly installed on the outer wall of the grouting head 104. An arc plate 206 and a fixed rod 203 are provided on one side of the fixed sleeve 201. A connecting sleeve 204 is fixedly installed at one end of the fixed rod 203. Adjustment mechanism 2 prevents the hose 103 from breaking.

[0038] Specifically, such as Figures 1-9 As shown, two hinge blocks 202 are fixedly installed on the side of the fixed sleeve 201, and two fixed rods 203 are provided. One end of each fixed rod 203 is hinged to the inner wall of the two hinge blocks 202 respectively. The inner wall of the connecting sleeve 204 is slidably connected to the outer wall of the hose 103. Multiple arc plates 206 are provided, and an arc rod 205 is slidably installed through the side of the arc plate 206 and the outer wall of the fixed rod 203.

[0039] In this embodiment, the fixed rod 203 is supported by the arc-shaped plate 206, so that the fixed rod 203 can be supported when it rotates up and down by a certain angle, further ensuring that the hose 103 can be bent up and down by a certain angle.

[0040] Specifically, such as Figures 1-9 As shown, the two ends of the arc-shaped rod 205 are fixedly connected to the side of the fixed sleeve 201. The side of the arc-shaped plate 206 is fixedly installed with a fixed block 207. The outer wall of the fixed sleeve 201 is fixedly installed with a support frame 208. The side of the support frame 208 is fixedly installed with a fixed plate 209. The side of the fixed plate 209 has an arc-shaped groove 210 that runs through it. The inner wall of the arc-shaped groove 210 is slidably connected to the side of the fixed block 207. The side of the fixed block 207 is slidably installed with an arc-shaped rod 211. The two ends of the arc-shaped rod 211 are fixedly connected to the inner wall of the arc-shaped groove 210.

[0041] In this embodiment: the arc-shaped groove 210 and the arc-shaped rod 211 limit the fixed block 207 and further limit the arc plate 206, so that the arc plate 206 rotates more stably.

[0042] Specifically, such as Figures 1-9 As shown, a fixing post 212 is fixedly installed on the side of the fixing plate 209. Two rotating sleeves 213 are rotatably installed on the outer wall of the fixing post 212 through the bearing seat. A fixing strip 214 is fixedly installed on the outer wall of the rotating sleeve 213. The other end of the fixing strip 214 is fixedly connected to the side of the fixing block 207.

[0043] In this embodiment, the fixing block 207 is supported by the fixing strip 214.

[0044] Specifically, such as Figures 1-9 As shown, an adjusting column 215 is fixedly installed on the side of the fixing strip 214, and a T-shaped groove 216 is opened on the side of the fixing plate 209. A T-shaped block 217 is slidably installed on the inner wall of the T-shaped groove 216. A threaded column 218 is fixedly installed on the side of the T-shaped block 217. An adjusting block 219 is fixedly installed on the threaded column 218 by a nut 221. An adjusting groove 220 is opened through the side of the adjusting block 219, and the inner wall of the adjusting groove 220 is slidably connected to the outer wall of the adjusting column 215.

[0045] In this embodiment: the T-shaped groove 216 is used to limit the T-shaped block 217 and further limit the threaded post 218. The nut 221 and the adjusting block 219 cooperate with the threaded post 218 to fix the adjusting block 219.

[0046] Specifically, such as Figures 1-9 As shown, connecting rods 229 are fixedly installed on the outer walls of the two arc-shaped plates 206, and cylinders 222 are fixedly installed on the side of the fixing rods 203. The outer wall of the cylinder 222 is provided with a slot 224, and the side of the arc-shaped plates 206 is provided with an installation groove 223. The outer wall of the installation groove 223 is slidably connected to the outer wall of the cylinder 222.

[0047] In this embodiment: the cylinder 222 is limited by the mounting groove 223, which further limits the fixing rod 203.

[0048] Specifically, such as Figures 1-9 As shown, the arc plate 206 has a movable groove 225 inside, and a movable sleeve 226 is slidably installed on the inner wall of the movable groove 225. A locking post 227 is slidably installed through the inner wall of the mounting groove 223. The outer wall of the locking post 227 is fixedly connected to the inner wall of the movable sleeve 226. The locking post 227 is engaged with the locking groove 224. An elastic element 228 is slidably installed on the outer wall of the locking post 227. Both ends of the elastic element 228 are fixedly connected to the side of the movable sleeve 226 and the inner wall of one side of the movable groove 225.

[0049] In this embodiment, the cylinder 222 is fixed by engaging the locking post 227 and the locking slot 224.

[0050] The fixing mechanism 3 is located on one side of the body 1. The fixing mechanism 3 includes a compression block 302 located inside the connecting sleeve 204. Two grooves 301 are opened on the inner wall of the connecting sleeve 204. The fixing mechanism 3 is used to fix the hose 103.

[0051] Specifically, such as Figures 1-9 As shown, the side of the extrusion block 302 is slidably connected to the inner wall of the groove 301. The outer wall of the fixing rod 203 is provided with a sliding groove 303. The inner wall of the sliding groove 303 is slidably installed with a sliding sleeve 304 and an elastic element 307. The two ends of the elastic element 307 are fixedly connected to the side of the sliding sleeve 304 and the inner wall of one side of the sliding groove 303.

[0052] In this embodiment, the hose 103 is clamped and fixed by the compression block 302, making the hose 103 more stable.

[0053] Specifically, such as Figures 1-9As shown, a limiting rod 306 is slidably installed through the side of the sliding sleeve 304. The two ends of the limiting rod 306 are fixedly connected to the inner walls of both sides of the sliding groove 303. Two wedge blocks 305 are fixedly installed on the outer wall of the sliding sleeve 304. The sides of the wedge blocks 305 are slidably connected to the sides of the arc plate 206.

[0054] In this embodiment: the sliding sleeve 304 is limited by the limiting rod 306 so that the sliding sleeve 304 will not rotate; the side of the wedge block 305 is slidably connected to the side of the arc plate 206; and the arc plate 206 presses and moves the wedge block 305.

[0055] Specifically, such as Figures 1-9 As shown, a connecting groove 310 is provided through the side of the extrusion block 302, and a support bar 308 is fixedly installed on the side of the sliding sleeve 304. One end of the support bar 308 slides through the inner wall of the sliding groove 303 and the side of the connecting sleeve 204 and extends into the interior of the connecting groove 310. Inclined grooves 311 are provided on the upper and lower inner walls of the connecting groove 310. A control column 309 is fixedly installed through the top surface of the support bar 308, and the outer walls of both ends of the control column 309 are slidably connected to the inner wall of the inclined groove 311.

[0056] In this embodiment: when the support bar 308 moves, the control column 309 cooperates with the inclined groove 311 to drive the extrusion block 302 to move and extrude and fix the outer wall of the hose 103.

[0057] The specific steps of this solution are as follows: After installing the grouting pipe inside the grouting hole inside the tunnel, the grouting head 104 is inserted into the grouting pipe, and the flange 105 is connected and fixed to the grouting pipe. The nut 221 is tightened to control the position of the adjusting block 219 and then fixed. The adjusting block 219, through the adjusting groove 220, drives the adjusting column 215 and the fixing strip 214 to rotate a certain angle, which in turn drives the fixing block 207 and the arc plate 206 to rotate a certain angle, loosening the hose 103 and causing it to droop. This causes the connecting sleeve 204 and the fixing rod 203 to rotate a certain angle, and the fixing rod 203 moves into the inner wall of the arc plate 206. The fixing rod 203 also drives the cylinder 222 to move into the inner wall of the installation groove 223. The locking column 227 engages with the locking groove 224 to fix the cylinder 222, further fixing the connecting sleeve 204 so that a certain angle is formed between the connecting sleeve 204 and the fixing sleeve 201. The hose 103 is then connected to the grouting head 104. A section of the hose is in an arc-shaped bend to prevent large-angle bending and damage at the connection between the hose 103 and the grouting head 104, allowing the grout to flow smoothly through the inner wall of the hose 103. Simultaneously, after the fixing rod 203 moves into the inner wall of the arc-shaped plate 206, the side of the arc-shaped plate 206 presses the wedge block 305 to move. The wedge block 305 drives the sliding sleeve 304 to move, which in turn drives the support bar 308 to move. The support bar 308 then drives the control column 309 to move. The control column 309, in conjunction with the inclined groove 311, moves the extrusion block 302. The extrusion blocks 302 on both sides press and fix the outer wall of the hose 103, preventing the hose 103 from slipping and the connection between the hose 103 and the grouting head 104 from shaking and being damaged, thus improving the quality and stability of the grouting. The feed pipe 101 connects to the external grout through a pipeline. The machine body 1 is then turned on to begin the grouting operation.

[0058] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0059] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A curtain grouting device for tunnel waterproofing, comprising: The machine body (1) has an inlet pipe (101) and an outlet pipe (102) installed on its side. One end of the outlet pipe (102) is fixedly installed with a grouting head (104) via a hose (103). A flange (105) is fixedly installed on the outer wall of the grouting head (104). The machine body (1) is characterized by further comprising: Adjustment mechanism (2), the adjustment mechanism (2) is set on one side of the machine body (1), the adjustment mechanism (2) includes a fixed sleeve (201) fixedly installed on the outer wall of the grouting head (104), an arc plate (206) and a fixed rod (203) are provided on one side of the fixed sleeve (201), a connecting sleeve (204) is fixedly installed on one end of the fixed rod (203), two hinge blocks (202) are fixedly installed on the side of the fixed sleeve (201), two fixed rods (203) are provided, one end of the two fixed rods (203) is respectively hinged to the inner wall of the two hinge blocks (202), the connecting sleeve (204) 204) The inner wall is slidably connected to the outer wall of the hose (103). Multiple arc-shaped plates (206) are provided. Arc-shaped rods (205) are slidably installed through the side of the arc-shaped plate (206) and the outer wall of the fixing rod (203). The two ends of the arc-shaped rods (205) are fixedly connected to the side of the fixing sleeve (201). Fixing blocks (207) are fixedly installed on the side of the arc-shaped plate (206). A support frame (208) is fixedly installed on the outer wall of the fixing sleeve (201). A fixing plate (209) is fixedly installed on the side of the support frame (208). An arc-shaped groove (21) is opened through the side of the fixing plate (209). 0), the inner wall of the arc groove (210) is slidably connected to the side of the fixing block (207), the side of the fixing block (207) is slidably connected to the arc rod two (211), the two ends of the arc rod two (211) are fixedly connected to the inner wall of the arc groove (210), the side of the fixing plate (209) is fixedly installed with a fixing column (212), the outer wall of the fixing column (212) is rotatably installed with two rotating sleeves (213) through bearing seats, the outer wall of the rotating sleeve (213) is fixedly installed with a fixing strip (214), the other end of the fixing strip (214) is fixedly connected to the side of the fixing block (207), the fixing An adjusting column (215) is fixedly installed on the side of the fixed bar (214). A T-shaped groove (216) is opened on the side of the fixed plate (209). A T-shaped block (217) is slidably installed on the inner wall of the T-shaped groove (216). A threaded column (218) is fixedly installed on the side of the T-shaped block (217). An adjusting block (219) is fixedly installed on the threaded column (218) by a nut (221). An adjusting groove (220) is opened through the side of the adjusting block (219). The inner wall of the adjusting groove (220) is slidably connected to the outer wall of the adjusting column (215). The adjusting mechanism (2) prevents the hose (103) from breaking. The fixing mechanism (3) is located on one side of the body (1). The fixing mechanism (3) includes a compression block (302) located inside the connecting sleeve (204). The inner wall of the connecting sleeve (204) has two grooves (301). The fixing mechanism (3) is used to fix the hose (103).

2. The curtain grouting device for tunnel waterproofing according to claim 1, characterized in that, Connecting rods (229) are fixedly installed on the outer walls of the two arc-shaped plates (206). A cylinder (222) is fixedly installed on the side of the fixing rod (203). A slot (224) is opened on the outer wall of the cylinder (222). An installation groove (223) is opened on the side of the arc-shaped plate (206). The outer wall of the installation groove (223) is slidably connected to the outer wall of the cylinder (222).

3. A curtain grouting device for tunnel waterproofing according to claim 2, characterized in that, The arc-shaped plate (206) has a movable groove (225) inside. A movable sleeve (226) is slidably installed on the inner wall of the movable groove (225). A locking post (227) is slidably installed through the inner wall of the mounting groove (223). The outer wall of the locking post (227) is fixedly connected to the inner wall of the movable sleeve (226). The locking post (227) is engaged with the locking groove (224). An elastic element (228) is slidably installed on the outer wall of the locking post (227). Both ends of the elastic element (228) are fixedly connected to the side of the movable sleeve (226) and the inner wall of one side of the movable groove (225).

4. The curtain grouting device for tunnel waterproofing according to claim 1, characterized in that, The side of the extrusion block (302) is slidably connected to the inner wall of the groove (301). The outer wall of the fixing rod (203) is provided with a sliding groove (303). The inner wall of the sliding groove (303) is slidably installed with a sliding sleeve (304) and an elastic element two (307). The two ends of the elastic element two (307) are fixedly connected to the side of the sliding sleeve (304) and the inner wall of one side of the sliding groove (303).

5. A curtain grouting device for tunnel waterproofing according to claim 4, characterized in that, The sliding sleeve (304) is slidably installed with a limiting rod (306) on its side. The two ends of the limiting rod (306) are fixedly connected to the inner walls of both sides of the sliding groove (303). Two wedge blocks (305) are fixedly installed on the outer wall of the sliding sleeve (304). The sides of the wedge blocks (305) are slidably connected to the sides of the arc plate (206).

6. A curtain grouting device for tunnel waterproofing according to claim 5, characterized in that, The extrusion block (302) has a through-hole connecting groove (310) on its side. The sliding sleeve (304) has a support bar (308) fixedly installed on its side. One end of the support bar (308) slides through the inner wall of the sliding groove (303) and the side of the connecting sleeve (204) and extends into the connecting groove (310). The upper and lower inner walls of the connecting groove (310) have inclined grooves (311). The top surface of the support bar (308) has a control column (309) fixedly installed through it. The outer walls of both ends of the control column (309) are slidably connected to the inner wall of the inclined groove (311).

Images