Grouting machine for filling road cracks

Abstract

The utility model relates to a grouting machine for road crack filling, which comprises a mobile vehicle, a grouting machine main body and a slurry conveying pipe, the grouting machine main body is connected to the mobile vehicle, the other end of the slurry conveying pipe is communicated with a slurry outlet head, the mobile vehicle is connected with a protection pipe, the slurry conveying pipe penetrates through the protection pipe, and the slurry outlet head is arranged outside the protection pipe. The slurry conveying pipe is sleeved with the protection pipe, so that the contact area between the slurry conveying pipe and the ground is reduced, the protection pipe is additionally arranged, the part, close to the protection pipe, of the slurry conveying pipe is lifted to be away from the ground, the contact area between the slurry conveying pipe and the ground is further reduced, and abrasion caused by long-time friction between the slurry conveying pipe and the ground is reduced.

Description

Technical Field

[0001] The present application relates to the field of road maintenance equipment, and in particular to a grouting machine for filling road cracks. Background Art

[0002] During road construction, when cracks develop on the pavement, construction workers often use grouting machines to repair them. Grouting machines are commonly used in civil engineering and construction projects to reinforce and repair concrete structures. They primarily fill cavities, cracks, or damaged areas by injecting a specific substance (such as concrete slurry or other materials) to enhance the strength and stability of the structure.

[0003] The Chinese patent with authorization announcement number CN220395218U discloses a portable high-pressure grouting machine, including a grouting pump box and a pressure pump fixedly installed on the grouting pump box, the discharge port of the pressure pump is fixedly connected to a grouting tube, the bottom of the grouting tube is fixedly connected to a deflection conduit, one end of the deflection conduit is fixedly provided with a pipe joint, a grouting assembly is provided on the pipe joint, and one end of the grouting tube is provided with a filter assembly for preventing the grouting port from being blocked. The utility model is a portable high-pressure grouting machine, which designs the slurry outlet pipe into an H-type and fixes the filter assembly by screwing it. During the grouting process, the solid suspended matter in the slurry is filtered and intercepted without affecting the circulation of the slurry, thereby reducing the probability of blockage of the high-pressure pipe or the grouting gun nozzle during grouting. The filter assembly can be quickly screwed and cleaned, which is convenient for cleaning and maintenance after use. It has the characteristics of being easy to carry, stable and efficient grouting, and safe and reliable.

[0004] Regarding the above-mentioned related technologies, after long-term use, the high-pressure pipe contacts and rubs against the ground repeatedly, and the surface of the high-pressure pipe is susceptible to wear. Utility Model Content

[0005] In order to reduce the wear of the grouting pipe, the present application provides a grouting machine for filling road cracks.

[0006] The present application provides a grouting machine for filling road cracks, which adopts the following technical solutions:

[0007] A grouting machine for filling road cracks includes a mobile vehicle, a grouting machine body, and a grouting pipe. The grouting machine body is connected to the mobile vehicle, one end of the grouting pipe is connected to the grouting machine body, and the other end of the grouting pipe is connected to a slurry outlet. The mobile vehicle is connected to a protective pipe, which is hinged to the mobile vehicle. The grouting pipe passes through the protective pipe, and the slurry outlet is arranged outside the protective pipe.

[0008] By adopting the above technical solution, when in use, the protective tube is rotated so that the protective tube is set horizontally, thereby facilitating the repair of road gaps by the slurry pipe, and the protective tube is sleeved on the slurry pipe to reduce the contact area between the slurry pipe and the ground, and an additional protective tube is added so that the slurry pipe close to the protective tube is lifted away from the ground, further reducing the contact area between the slurry pipe and the ground, thereby reducing the wear caused by long-term friction between the slurry pipe and the ground.

[0009] Optionally, a rotating shaft is connected to one end of the protective tube, and a support rod is connected to the top of the mobile vehicle. The support rod is provided with a rotating hole, and the rotating shaft passes through and is rotatably connected to the rotating hole. The rotating shaft and the support rod are connected by a torsion spring. When the protective tube is set vertically, the torsion spring does not deform. The rotating shaft is connected to a first locking assembly, and the first locking assembly is used to lock the rotating shaft to the support rod. When the first locking assembly locks the rotating shaft and the support rod, the protective tube is set horizontally.

[0010] By adopting the above technical solution, when in use, the protective tube is rotated, and the first locking component locks the rotating shaft to the support rod, so that the protective tube is set horizontally. After the road crack is repaired, the first locking component unlocks the rotating shaft and the support rod, and the torsion spring drives the protective tube to rotate and set the protective tube vertically, thereby facilitating the rapid storage of the protective tube and improving work efficiency.

[0011] Optionally, a mounting groove is provided on the circumferential side of the rotating shaft, and the depth direction of the mounting groove is consistent with the radial direction of the rotating shaft. The first locking assembly includes a first spring and a locking block. The length direction of the first spring is consistent with the depth direction of the mounting groove. One end of the first spring is connected to the inner wall of the mounting groove along its length direction, and the other end of the first spring is connected to the locking block. The locking block is slidably connected to the mounting groove along the depth direction of the mounting groove. A locking groove is provided on the inner wall of the rotating hole. When the locking block is embedded in the locking groove, the rotating shaft is locked to the support rod.

[0012] By adopting the above technical solution, when the protective tube is set vertically, the locking block is embedded in the installation groove, and the first spring is squeezed and deformed, and the locking groove is not connected to the installation groove. When in use, the protective tube is rotated and the rotating shaft rotates with the protective tube, and the locking block approaches the locking groove. When the installation groove is connected to the locking groove, the first spring restores its shape and pushes the locking block to move along the length direction of the installation groove, and drives the locking block to be embedded in the locking groove, so that the rotating shaft is stably connected to the support rod, so that the protective tube can be placed horizontally and stably.

[0013] Optionally, the rotating shaft includes a sleeve and a sliding block, the sleeve is sleeved on the sliding block, the central axis of the sleeve is collinear with the central axis of the sliding block, the sliding block is slidingly connected in the sleeve along the length direction of the sleeve, the mounting groove is opened on the peripheral side of the sliding block, the sleeve is provided with a through hole for the locking block to pass through, the locking block is provided with a guide surface on one side along the length direction of the sleeve, the guide surface is inclined, and the guide surface facilitates the locking block to move away from the locking groove and the through hole.

[0014] By adopting the above technical solution, after the road cracks are filled, the sliding block is pushed along the length direction of the rotating shaft, so that the sliding block moves along the length direction of the sleeve and drives the locking block to move. Under the guidance of the guide surface, the locking block moves away from the locking groove and the through hole and is embedded in the installation groove, thereby facilitating the rotation of the rotating shaft. The torsion spring drives the rotating shaft to rotate and makes the protective tube vertically arranged, thereby facilitating the storage of the protective tube.

[0015] Optionally, a second spring is connected inside the sleeve, the length direction of the second spring is consistent with the length direction of the sleeve, one end of the second spring is connected to the inner wall of the sleeve, and the other end of the second spring is connected to the sliding block. When the mounting groove is connected to the through hole, the second spring does not deform.

[0016] By adopting the above technical solution, after the road crack is filled, the sliding block is pushed along the length direction of the rotating shaft, thereby causing the second spring to be squeezed and deformed. When the protective tube is set vertically, the pressure on the sliding block is released, the second spring recovers its deformation and pushes the sliding block along the length direction of the rotating shaft, so that the sliding block is reset and the installation groove is connected to the through hole, so that the locking block is embedded in the locking groove for subsequent use.

[0017] Optionally, the protective tube is configured as a telescopic tube, comprising a first tube and a second tube, the second tube being slidably sleeved on the first tube, the central axis of the second tube being collinear with the central axis of the first tube, the second tube being connected to a second locking assembly, and the second locking assembly being used to lock the second tube to the first tube.

[0018] By adopting the above technical solution, the second tube is slid along the length direction of the first tube to adjust the overall length of the protective tube. After the adjustment is completed, the second tube is locked on the first tube through the second locking assembly, so as to adapt to filling operations in different ranges.

[0019] Optionally, the second locking assembly includes a limit rod and a third spring. The length direction of the limit rod is consistent with the radial direction of the second tube. The limit rod passes through and is slidably connected to the inner wall of one side of the second tube along its length direction. The length direction of the third spring is consistent with the length direction of the limit rod. One end of the third spring is connected to the limit rod, and the other end of the third spring is connected to the second tube. Several grooves for embedding the limit rod are opened on the circumference of the first tube, and the several grooves are spaced in sequence along the length direction of the first tube. When the limit rod is embedded in the groove, the third spring is deformed and drives the limit rod to press tightly against the groove.

[0020] By adopting the above technical solution, when adjusting the length of the protective tube according to the filling range, the limit rod is pulled radially along the second tube, so that the limit rod moves along its length direction and away from the groove, causing the third spring to deform, thereby facilitating the movement of the second tube along its length direction. When adjusted to the required length, the limit rod is released, the third spring restores its shape and pushes the limit rod to be embedded in the corresponding groove, thereby making the second tube stably connected to the first tube, making it easier for the protective tube to adapt to filling operations in different ranges.

[0021] Optionally, a limiting groove is opened on the circumference of the first tube, the length direction of the limiting groove is consistent with the length direction of the first tube, the groove is connected to the limiting groove, the limiting rod is embedded in the limiting groove, and the limiting rod is slidably connected to the limiting groove along the length direction of the first tube.

[0022] By adopting the above technical solution, when adjusting the length of the protective tube, the second tube slides with the first tube along its length direction. At the same time, the limiting rod slides in the limiting groove along the length direction of the first tube, so that the second tube moves stably in a predetermined direction, making it easier for the limiting rod to be embedded in the groove.

[0023] Optionally, a rotating block is connected to the bottom of the support rod, the mobile vehicle is provided with a connecting groove, the rotating block is embedded in the connecting groove, the rotating block is rotatably connected in the connecting groove, the grouting machine body is connected to a ring, one end of the ring is provided with a connecting port for embedding a protective tube, and the central axis of the ring is vertically arranged.

[0024] By adopting the above technical solution, the support rod is rotatably connected to the mobile vehicle through the rotating block, so that the slurry pipe can fill road cracks at different positions, increase the scope of use of the slurry pipe, and add a ring so that the protective pipe can be stably connected to the mobile vehicle when it is set vertically.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. When in use, the protective tube is rotated so that it is placed horizontally, which facilitates the repair of road cracks by the slurry pipe. The protective tube is placed on the slurry pipe to reduce the contact area between the slurry pipe and the ground. By adding a protective tube, the slurry pipe close to the protective tube is lifted away from the ground, further reducing the contact area between the slurry pipe and the ground, thereby reducing the wear caused by long-term friction between the slurry pipe and the ground.

[0027] 2. When in use, the protective tube is rotated, and the first locking assembly locks the rotating shaft to the support rod, so that the protective tube is placed horizontally. After the road crack repair is completed, the first locking assembly unlocks the rotating shaft and the support rod, and the torsion spring drives the protective tube to rotate and place the protective tube vertically, thereby facilitating the quick storage of the protective tube and improving work efficiency.

[0028] 3. Slide the second tube along the length direction of the first tube to adjust the overall length of the protective tube. After the adjustment is completed, lock the second tube to the first tube through the second locking assembly to facilitate filling operations in different ranges. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural diagram of this embodiment.

[0030] Figure 2 It is a top view of this embodiment.

[0031] Figure 3 This embodiment Figure 2 Cross-sectional view along the AA axis.

[0032] Figure 4 This embodiment Figure 2 Cross-sectional view along the BB direction.

[0033] Figure 5 This embodiment Figure 4 Magnified view of part C.

[0034] Figure 6 This embodiment Figure 3 Magnified view of part D.

[0035] Explanation of reference numerals: 100, mobile vehicle; 110, connecting groove; 120, rotating block; 130, supporting rod; 140, rotating hole; 141, locking groove; 150, torsion spring; 200, grouting machine body; 210, ring; 211, connecting port; 300, slurry delivery pipe; 310, slurry outlet; 320, opening and closing valve; 400, protective tube; 410, mounting rod; 420, rotating shaft; 421, sleeve; 4 22. Sliding block; 423. Second spring; 424. Mounting groove; 435. Through hole; 430. First tube; 431. Limiting groove; 432. Recess; 440. Second tube; 441. Mounting cavity; 500. First locking assembly; 510. First spring; 520. Locking block; 600. Second locking assembly; 610. Limiting rod; 611. Mounting ring; 612. Connecting block; 620. Third spring. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-6 This application is described in further detail.

[0037] The embodiment of the present application discloses a grouting machine for filling road cracks. Figure 1 and Figure 2 A grouting machine for filling road cracks includes a mobile vehicle 100, a grouting machine body 200, and a grouting pipe 300. The grouting machine body 200 is connected to the mobile vehicle 100. The mobile vehicle 100 is hinged with a protective pipe 400. One end of the grouting pipe 300 is connected to the grouting machine body 200, and the other end of the grouting pipe 300 passes through the protective pipe 400. The end of the grouting pipe 300 away from the grouting machine body is connected to a slurry discharge head 310. The slurry discharge head 310 is connected to an on-off valve 320. The on-off valve 320 is connected to the end of the grouting head 310 near the protective pipe 400. The addition of the protective pipe 400 reduces the contact area between the grouting pipe 300 and the ground, thereby reducing wear on the grouting pipe 300.

[0038] Reference Figure 1 and Figure 3 The top of the mobile vehicle 100 is provided with a connecting groove 110, the depth of which is aligned with the vertical direction. A rotating block 120 is rotatably connected within the connecting groove 110. The rotating block 120 is rotatably connected within the connecting groove 110, and the rotating axis of the rotating block 120 is arranged in the vertical direction. Two support rods 130 are connected to the top of the rotating block 120, and the support rods 130 are spaced apart in a radial direction along the rotating block 120.

[0039] Reference Figure 4 and Figure 5Two mounting rods 410 are connected to the bottom end of the protective tube 400. The length direction of the mounting rods 410 is consistent with the length direction of the protective tube 400, and the two mounting rods 410 are arranged on the protective tube 400 and distributed radially along the protective tube 400. The mounting rods 410 are fixedly connected to a rotating shaft 420, and the length direction of the rotating shaft 420 is consistent with the radial direction of the protective tube 400.

[0040] Reference Figure 4 and Figure 5 The rotating shaft 420 corresponds to the support rod 130 one-to-one. The support rod 130 has a rotation hole 140, and the rotating shaft 420 passes through the rotation hole 140 along its length and is rotatably connected to the rotation hole 140. The rotating shaft 420 and the support rod 130 are connected by a torsion spring 150. When the protective tube 400 is set vertically, the torsion spring 150 does not deform.

[0041] Reference Figure 1 The grouting machine body 200 is connected to a ring 210 , the central axis of the ring 210 is consistent with the vertical direction, and one end of the ring 210 is provided with a connection port 211 for embedding the protective tube 400 .

[0042] Reference Figure 4 and Figure 5 The rotating shaft 420 is connected to a first locking assembly 500, which is used to lock the rotating shaft 420 to the support rod 130. When the first locking assembly 500 locks the rotating shaft 420 and the support rod 130, the protective tube 400 is set horizontally and the torsion spring 150 is deformed. The rotating shaft 420 includes a sleeve 421 and a sliding block 422. The length direction of the sleeve 421 is consistent with the radial direction of the protective tube 400, and one end of the sleeve 421 is connected to the mounting rod 410 along its length, and the other end of the sleeve 421 is open. A second spring 423 is connected to the sleeve 421. The length direction of the second spring 423 is consistent with the length direction of the sleeve 421. One end of the second spring 423 is connected to the inner wall of the sleeve 421 along its length, and the other end of the second spring 423 is connected to the sliding block 422. The sliding block 422 is slidably connected to the sleeve 421 along the length direction of the sleeve 421. The sleeve 421 is sleeved on the sliding block 422 , and the central axis of the sleeve 421 is collinear with the central axis of the sliding block 422 .

[0043] Reference Figure 5The sliding block 422 has a mounting groove 424 defined around its periphery. The depth of the mounting groove 424 coincides with the radial direction of the sliding block 422. The first locking assembly 500 includes a first spring 510 connected to the mounting groove 424 and a locking block 520. The length of the first spring 510 coincides with the depth of the mounting groove 424. One end of the first spring 510 is connected to the inner wall of the mounting groove 424 along its length, and the other end of the first spring 510 is connected to one end of the locking block 520. The locking block 520 is slidably connected to the mounting groove 424 along its depth. The sleeve 421 has a through hole 435 through which the locking block 520 passes. The inner wall of the rotating hole 140 has a locking groove 141 defined. When the protective tube 400 is positioned horizontally, the locking block 520 passes through the through hole 435 and is embedded in the locking groove 141. The locking block 520 is provided with a guide surface along one side of the sleeve 421 in the longitudinal direction. The guide surface is provided on the side of the locking block 520 close to the mounting rod 410 and on the end of the locking block 520 away from the first spring 510. The guide surface is arranged at an angle to facilitate the locking block 520 to move away from the locking groove 141 and the through hole 435. When the locking block 520 moves away from the through hole 435, the second spring 423 is squeezed and deformed.

[0044] During use, the protective tube 400 is rotated so that the protective tube 400 is set horizontally, and the locking block 520 passes through the through hole 435 and is embedded in the locking groove 141. After use, the sliding block 422 is pushed along the length direction of the sleeve 421 so that the locking block 520 is embedded in the installation groove 424 and away from the locking groove 141, so that the torsion spring 150 drives the protective tube 400 to rotate, so that the protective tube 400 is set vertically.

[0045] Reference Figure 3 The protective tube 400 is a telescopic tube, comprising a first tube 430 and a second tube 440. The second tube 440 is slidably mounted on the first tube 430, with the central axis of the second tube 440 being collinear with the central axis of the first tube 430. The mounting rod 410 is connected to the bottom end of the first tube 430.

[0046] Reference Figure 3 and Figure 6The second tube 440 is connected to a second locking assembly 600, which is used to lock the second tube 440 to the first tube 430. The locking assembly includes a limiting rod 610 and a third spring 620. The limiting rod 610 is radially aligned with the second tube 440 in its length direction. The limiting rod 610 passes through and is slidably connected to one side of the second tube 440 along its length. A mounting cavity 441 is defined within the second tube 440, and the limiting rod 610 passes through the mounting cavity 441 along its length. A mounting ring 611 is fixed to the limiting rod 610. The central axis of the mounting ring 611 is collinear with the central axis of the limiting rod 610. The mounting ring 611 is slidably connected to the mounting cavity 441 along the length of the limiting rod 610. The third spring 620 is disposed within the mounting cavity 441. The length of the third spring 620 coincides with the length of the limiting rod 610, and the third spring 620 is sleeved onto the limiting rod 610. One end of the third spring 620, along its length and adjacent to the first tube 430, is connected to the mounting ring 611, while the other end of the third spring 620 is connected to the inner wall of the mounting cavity 441. The end of the limiting rod 610, distal from the first tube 430, is connected to a connecting block 612.

[0047] Reference Figure 3 and Figure 6 A limiting groove 431 is defined on the periphery of the first tube 430. The length of the limiting groove 431 is aligned with the length of the first tube 430. The limiting rod 610 is inserted into the limiting groove 431 at one end away from the connecting block 612. The limiting rod 610 is slidably connected to the limiting groove 431 along the length of the first tube 430. The limiting groove 431 defines a plurality of grooves 432 for the limiting rod 610 to insert into. The grooves 432 are spaced apart along the length of the first tube 430. When the limiting rod 610 is inserted into the grooves 432, the third spring 620 deforms and forces the limiting rod 610 to press against the grooves 432.

[0048] When adjusting the length of the protective tube 400 according to the filling range, the limiting rod 610 is pulled radially along the second tube 440 so that the limiting rod is away from the groove 432, and the second tube 440 is moved along the length direction of the second tube 440. The second tube 440 is slidably connected to the first tube 430 along its length direction. When adjusted to the required length, the limiting rod 610 is embedded in the groove 432 at the corresponding position, so that the second tube 440 is stably connected to the first tube 430 and adapts to different filling ranges.

[0049] The grouting machine for filling road cracks according to the embodiment of the present application is implemented as follows: during use, the protective tube 400 is rotated so that the protective tube 400 is arranged horizontally. When the protective tube 400 rotates, the installation rod 410 and the rotating shaft 420 are rotated. The rotating shaft 420 drives the locking block 520 to approach the locking groove 141. The first spring 510 drives the locking block 520 to be embedded in the locking groove 141, thereby stably connecting the installation rod 410 to the support rod 130. The length of the protective tube 400 is adjusted according to the size of the filling range. The limiting rod 610 is pulled along the second tube 440, and the limiting rod 610 is moved away from the groove 432, thereby facilitating the movement of the second tube 440. The second tube 440 slides along its length relative to the first tube 430, thereby changing the length of the protective tube 400 to adapt to different sizes of filling ranges. This reduces the contact area between the slurry pipe 300 and the ground, reducing damage to the slurry pipe 300.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A grouting machine for filling road cracks, comprising a mobile vehicle (100), a grouting machine body (200), and a grouting pipe (300), wherein the grouting machine body (200) is connected to the mobile vehicle (100), one end of the grouting pipe (300) is connected to the grouting machine body (200), and the other end of the grouting pipe (300) is connected to a grouting head (310), characterized in that: The mobile vehicle (100) is connected to a protective tube (400), the protective tube (400) is hinged to the mobile vehicle (100), the slurry delivery pipe (300) passes through the protective tube (400), and the slurry outlet head (310) is arranged outside the protective tube (400).

2. A grouting machine for filling road cracks according to claim 1, characterized in that: One end of the protection tube (400) is connected to a rotating shaft (420), and the top of the mobile vehicle (100) is connected to a support rod (130). The support rod (130) is provided with a rotating hole (140). The rotating shaft (420) passes through and is rotatably connected to the rotating hole (140). The rotating shaft (420) and the support rod (130) are connected via a torsion spring (150). When the protection tube (400) is vertically arranged, the torsion spring (150) does not deform. The rotating shaft (420) is connected to a first locking assembly (500). The first locking assembly (500) is used to lock the rotating shaft (420) to the support rod (130). When the first locking assembly (500) locks the rotating shaft (420) and the support rod (130), the protection tube (400) is horizontally arranged.

3. A grouting machine for filling road cracks according to claim 2, characterized in that: A mounting groove (424) is provided on the circumferential side of the rotating shaft (420), and the depth direction of the mounting groove (424) is consistent with the radial direction of the rotating shaft (420). The first locking assembly (500) includes a first spring (510) and a locking block (520), and the length direction of the first spring (510) is consistent with the depth direction of the mounting groove (424). One end of the first spring (510) is connected to the inner wall of the mounting groove (424) along its length direction, and the other end of the first spring (510) is connected to the locking block (520). The locking block (520) is slidably connected to the mounting groove (424) along the depth direction of the mounting groove (424). A locking groove (141) is provided on the inner wall of the rotating hole (140). When the locking block (520) is embedded in the locking groove (141), the rotating shaft (420) is locked to the support rod (130).

4. A grouting machine for filling road cracks according to claim 3, characterized in that: The rotating shaft (420) includes a sleeve (421) and a sliding block (422), wherein the sleeve (421) is sleeved on the sliding block (422), the central axis of the sleeve (421) is colinear with the central axis of the sliding block (422), and the sliding block (422) is slidingly connected to the sleeve (421) along the length direction of the sleeve (421), and the mounting groove (424) is provided on the peripheral side of the sliding block (422), and the sleeve (421) is provided with a through hole (435) for the locking block (520) to pass through, and the locking block (520) is provided with a guide surface along one side of the length direction of the sleeve (421), and the guide surface is inclined, and the guide surface facilitates the locking block (520) to move away from the locking groove (141) and the through hole (435).

5. A grouting machine for filling road cracks according to claim 4, characterized in that: A second spring (423) is connected inside the sleeve (421), and the length direction of the second spring (423) is consistent with the length direction of the sleeve (421). One end of the second spring (423) is connected to the inner wall of the sleeve (421), and the other end of the second spring (423) is connected to the sliding block (422). When the mounting groove (424) is connected to the through hole (435), the second spring (423) does not deform.

6. A grouting machine for filling road cracks according to claim 1, characterized in that: The protective tube (400) is a telescopic tube. The protective tube (400) includes a first tube (430) and a second tube (440). The second tube (440) is slidably sleeved on the first tube (430). The central axis of the second tube (440) is colinear with the central axis of the first tube (430). The second tube (440) is connected to a second locking assembly (600). The second locking assembly (600) is used to lock the second tube (440) on the first tube (430).

7. A grouting machine for filling road cracks according to claim 6, characterized in that: The second locking assembly (600) includes a limiting rod (610) and a third spring (620). The limiting rod (610) has a length direction that is consistent with the radial direction of the second tube (440). The limiting rod (610) passes through and is slidably connected to the inner wall of one side of the second tube (440) along its length direction. The third spring (620) has a length direction that is consistent with the length direction of the limiting rod (610). One end of the third spring (620) is connected to the limiting rod (610), and the other end of the third spring (620) is connected to the second tube (440). The first tube (430) is provided with a plurality of grooves (432) for the limiting rod (610) to be embedded. The plurality of grooves (432) are sequentially spaced along the length direction of the first tube (430). When the limiting rod (610) is embedded in the groove (432), the third spring (620) is deformed and drives the limiting rod (610) to press against the groove (432).

8. A grouting machine for filling road cracks according to claim 7, characterized in that: A limiting groove (431) is provided on the circumferential side of the first tube (430), the length direction of the limiting groove (431) is consistent with the length direction of the first tube (430), the groove (432) is communicated with the limiting groove (431), the limiting rod (610) is embedded in the limiting groove (431), and the limiting rod (610) is slidably connected to the limiting groove (431) along the length direction of the first tube (430).

9. The grouting machine for filling road cracks according to claim 2, characterized in that: The bottom of the support rod (130) is connected to a rotating block (120), the mobile vehicle (100) is provided with a connecting groove (110), the rotating block (120) is embedded in the connecting groove (110), and the rotating block (120) is rotatably connected in the connecting groove (110), the grouting machine body (200) is connected to a ring (210), one end of the ring (210) is provided with a connecting port (211) for embedding a protective tube (400), and the central axis of the ring (210) is vertically arranged.

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