Pipe burying and grooving device for hard soil

Abstract

The invention provides a hard soil buried pipe slotting device, and relates to the field of water conservancy construction equipment, the hard soil buried pipe slotting device comprises a main body, the top of the main body is provided with a slot, and the bottom of the main body is provided with a toggle mechanism; the shifting mechanism comprises a sliding groove, and the sliding groove is of an arc-shaped structure and is formed in one side of the top of the main body; the cleaning mechanism is installed at the top of the main body and comprises transverse grooves and a movable plate, the transverse grooves are formed in the two sides of an open groove in the top of the main body, a motor is installed on the outer side of the movable plate, a bevel gear is installed at the output end of the motor, protruding blocks are arranged on the two sides of the movable plate, and the movable plate is slidably installed in the open groove in the top of the main body; soil generated by grooving in hard soil is stirred to the two sides through the two stirring plates, the situation that the soil generated by grooving falls into a groove again is reduced, and the problems that when an existing grooving device is used, the soil generated by grooving can be accumulated on the two sides of the groove, and a pipeline pushes part of the soil into the groove are solved.

Description

Technical Field

[0001] This invention relates to the field of water conservancy construction equipment technology, and in particular to a device for trenching buried pipes in hard soil. Background Technology

[0002] A grooving device is a device that uses a rotating milling disc as its main working component to create grooves. In the process of water conservancy engineering construction, hard soil layers are often encountered. By using a grooving device to create grooves in hard soil, it is easier to lay pipelines in water conservancy projects and improve the construction progress.

[0003] When existing trenching devices are used to trench hard soil layers during water conservancy engineering construction, the soil produced during trenching will accumulate on both sides of the trench. When laying pipes, the pipes will push some of the soil into the completed trench, resulting in uneven bottom of the trench. This leads to inconsistent pipe laying heights and affects the later sealing performance of the pipes. Summary of the Invention

[0004] In view of this, the present invention provides a trenching device for laying pipes in hard soil, in order to solve the problem that when existing trenching devices are used, the soil generated during trenching will accumulate on both sides of the trench, and when laying the pipe, the pipe will push some of the soil into the completed trench, resulting in an uneven bottom of the trench and thus uneven pipe laying height.

[0005] This invention provides a trenching device for buried pipes in hard soil, specifically comprising: a main body, wherein wheels are rotatably mounted on the bottom of the main body, and a groove is provided on the top of the main body, and a toggle mechanism is installed on the bottom of the main body; the toggle mechanism includes a sliding groove, which is arc-shaped and located on one side of the top of the main body; and a cleaning mechanism installed on the top of the main body, which includes a horizontal groove and a movable plate, wherein the horizontal groove is located on both sides of the groove on the top of the main body, the movable plate is U-shaped, a motor is installed on the outer side of the movable plate, a bevel gear is installed at the output end of the motor, and protrusions are provided on both sides of the movable plate, and the movable plate is slidably installed in the groove on the top of the main body, and the protrusions on both sides of the movable plate are slidably installed inside the horizontal groove.

[0006] Furthermore, the main body includes: a housing, which is a U-shaped structure, with a threaded rod installed on the top of the housing, and the housing is installed on the top of the main body, with the bottom of the housing located on both sides of the slot on the top of the main body; and a carrier plate, with a motor installed on the top of the carrier plate, and the carrier plate is slidably installed inside the housing and in the slot on the top of the main body, with the middle position of the top of the carrier plate connected to the bottom end of the threaded rod on the top of the housing.

[0007] Furthermore, the main body also includes: a positioning rod, which is a cylindrical structure, with its bottom installed on both sides of the top of the carrier plate, and its top penetrating the top of the housing; and a rotating component, which has a paddle on its outer side, and its side is rotatably mounted on the bottom of the carrier plate via a rotating shaft, with the rotating shaft on the side of the rotating component connected to the motor output end at the top of the carrier plate via a chain assembly.

[0008] Furthermore, the main body also includes: a guide groove, which is provided on both sides of the rotating part; a bracket, on the top of which a threaded rod is rotatably mounted, and on the bottom of which a drive handle is mounted, and the bracket penetrates the bottom of the carrier plate, and the threaded rod at the top of the bracket is rotatably mounted on both sides of the top of the carrier plate.

[0009] Furthermore, the main body also includes: a label plate, which has a U-shaped structure and is installed at the bottom of the bracket, and is located on the outside of the rotating part; and a guide plate, which has inclined structures on both sides of its top and is installed on the side of the label plate.

[0010] Furthermore, the actuating mechanism also includes: a rotating rod, which is cylindrical in shape and has a limit block installed at its top, and the rotating rod passes through the top of the main body, and the top of the rotating rod is connected to the top of the main body by a spring; and a slider, which is annular in shape, and the outer side of the slider is slidably mounted inside the groove by a spring.

[0011] Furthermore, the actuating mechanism also includes: a vertical rod, which is a cylindrical structure, with its bottom slidably mounted on the inner side of the slider, and a limit block mounted on its top; and a dial plate, which has a slot on its outer side, and its top is connected to the rotating rod and the bottom of the vertical rod.

[0012] Furthermore, the cleaning mechanism also includes: a drive rod, the inner end of which is equipped with a bevel gear, and the additional ends of the two drive rods are mounted on the top and bottom of the movable plate through structural components, and the bevel gear at the inner end of the drive rod meshes with the bevel gear at the output end of the motor on the outer side of the movable plate; a lever, the outer end of which has an arc-shaped structure, and the lever itself has a cylindrical structure, and the inner end of the lever is mounted on the outer side of the drive rod.

[0013] Furthermore, the cleaning mechanism also includes: a crossbar, which is a cylindrical structure and is installed on the inner side of the movable plate, with a return spring installed on the outer side of the crossbar; a cleaning plate, with a wire brush installed on the outer side of the cleaning plate, and the cleaning plate is slidably installed on the outer side of the crossbar, with the side end of the crossbar connected to the return spring on the outer side of the crossbar, and a protrusion provided on the inner side of the cleaning plate, with a lever slidably installed on the side of the protrusion on the inner side of the cleaning plate.

[0014] Furthermore, the cleaning mechanism also includes: a positioning plate, which is circular in shape and has an opening in the middle, and a connecting rod installed on the inner edge of the positioning plate, the connecting rod being installed on the inner side of the movable plate side; and a guide rod, which is slidably installed in the opening in the middle of the positioning plate, the inner end of the guide rod being connected to the inner side of the positioning plate, and the inner end of the guide rod being slidably installed inside the guide groove.

[0015] Beneficial effects

[0016] I. In this invention, by using two deflecting plates to move the soil generated during trenching in hard soil to both sides, the soil generated during trenching is reduced from falling back into the trench. During the construction of water conservancy projects, when trenching is carried out on hard soil layers, the soil generated by the rotating component is distributed on both sides of the trench. The main body moves above the trench, which drives the deflecting plates to move simultaneously. Under the action of the spring, the rotating rod drives the deflecting plates to move downwards to contact the surface of the hard soil layer. Under the action of the spring, the slider moves along the chute, causing the slider to drive the vertical rod, which in turn causes the deflecting plates to move the soil generated during trenching to a more distant position on both sides. This prevents the soil from being moved back into the trench during the pipe laying process, ensuring that the bottom of the trench is relatively flat. When laying pipes in water conservancy projects, the pipes are laid more neatly, ensuring the stability of the pipe connection, improving the sealing of the pipes, and ensuring the quality of water conservancy project construction.

[0017] II. In this invention, the milling and polishing disc used for grooving is cleaned by using a wire brush on the outside of the cleaning plate to prevent the hardening of the soil from affecting the normal operation of the milling and polishing disc. During the construction of water conservancy projects, after grooving hard soil layers, a movable plate is moved in the groove at the top of the main body, so that the protrusions on both sides of the movable plate move along the transverse groove. Under the action of the spring, the outer end of the guide rod is inserted into the guide groove. The motor at the top of the carrier plate drives the rotating part to rotate slowly, and the movable plate moves back and forth under the action of the guide rod, so that the cleaning plate can avoid direct contact with the paddle on the outside of the rotating part. The paddle moves the protrusion on the inside of the cleaning plate back and forth along the transverse bar, so that the wire rope on the outside of the cleaning plate cleans the outside of the rotating part, ensuring that the adhesion of soil on the rotating part is reduced, preventing the soil from drying out and affecting the sharpness of the grooving of the rotating part, and ensuring normal grooving of hard soil layers in the next time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram:

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

[0022] Figure 2 This is a schematic diagram of the main cross-sectional structure of an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the carrier plate according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the dial plate according to an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the slider according to an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the movable plate according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the cleaning plate according to an embodiment of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the guide rod according to an embodiment of the present invention.

[0029] List of reference numerals

[0030] 1. Main body; 101. Shell; 102. Carrier plate; 103. Positioning rod; 104. Rotating component; 105. Guide groove; 106. Bracket; 107. Standard plate; 108. Guide plate;

[0031] 2. Actuating mechanism; 201. Slide groove; 202. Rotating rod; 203. Sliding block; 204. Vertical rod; 205. Actuating plate;

[0032] 3. Cleaning mechanism; 301. Horizontal groove; 302. Movable plate; 303. Drive rod; 304. Toggle rod; 305. Crossbar; 306. Cleaning plate; 307. Positioning plate; 308. Guide rod. Detailed Implementation

[0033] To make the objectives, solutions, and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention.

[0034] Example: Please refer to Figures 1 to 8 As shown:

[0035] This invention provides a trenching device for buried pipes in hard soil, comprising: a main body 1, with wheels rotatably mounted on the bottom of the main body 1, and a trench provided on the top of the main body 1, and a toggle mechanism 2 mounted on the bottom of the main body 1; the toggle mechanism 2 includes a sliding groove 201, which has an arc-shaped structure and is located on one side of the top of the main body 1; and a cleaning mechanism 3, which is mounted on the top of the main body 1, and includes a horizontal groove 301 and a movable plate 302, with the horizontal groove 301 located on both sides of the trench on the top of the main body 1, and the movable plate 302 having a U-shaped structure, with a motor mounted on the outer side of the movable plate 302, a bevel gear mounted on the output end of the motor, and protrusions on both sides of the movable plate 302, and the movable plate 302 is slidably mounted in the trench on the top of the main body 1, with the protrusions on both sides of the movable plate 302 slidably mounted inside the horizontal groove 301.

[0036] The main body 1 includes: a housing 101, which has a U-shaped structure and a threaded rod installed on its top. The housing 101 is mounted on the top of the main body 1, and its bottom is located on both sides of the slot at the top of the main body 1; a carrier plate 102, which has a motor installed on its top and is slidably mounted inside the slot at the top of the housing 101 and the main body 1, with the middle position of the top of the carrier plate 102 connected to the bottom end of the threaded rod at the top of the housing 101; and a positioning rod 103, which has a cylindrical structure and its bottom is installed on both sides of the top of the carrier plate 102. 3. The top of the component penetrates the top of the housing 101; a rotating component 104 is provided with a lever on its outer side, and the side of the rotating component 104 is rotatably mounted on the bottom of the carrier plate 102 via a rotating shaft, and the rotating shaft on the side of the rotating component 104 is connected to the motor output end on the top of the carrier plate 102 via a chain assembly; a guide groove 105 is provided on both sides of the rotating component 104; a bracket 106 is rotatably mounted on the top of the bracket 106, and a drive handle is installed on the bottom of the threaded rod, and the bracket 106 penetrates the bottom of the carrier plate 102, and the threaded rod on the top of the bracket 106 is rotatably mounted on both sides of the top of the carrier plate 102; a label plate 107. The marker plate 107 has a U-shaped structure and is installed at the bottom of the bracket 106, located outside the rotating component 104. The guide plate 108 has inclined top sides and is installed on the side of the marker plate 107. During the construction of water conservancy projects, when trenching hard soil layers, the height of the marker plate 107 is adjusted according to the required trenching depth. The drive handle at the bottom of the threaded rod is rotated at the top of the bracket 106, causing the threaded rod to move on both sides of the top of the carrier plate 102. This causes the bottom of the threaded rod to adjust the position of the bracket 106, while the bracket 106 simultaneously moves the guide plate. When 108 is in the appropriate position, the motor at the top of the carrier plate 102 drives the rotating component 104 to rotate at the bottom of the carrier plate 102 via the chain assembly. The threaded rod at the top of the housing 101 drives the carrier plate 102 to move downward. The two positioning rods 103 at the top of the carrier plate 102 ensure that the carrier plate 102 moves vertically downward. The rotating component 104 at the bottom of the carrier plate 102 grooves the hard soil layer, so that the bottom of the standard plate 107 contacts the ground, and the main body 1 moves on the hard soil layer. The groove depth of the rotating component 104 is the same. The soil brought out by the paddle on the outside of the rotating component 104 is guided to both sides after passing through the guide plate 108 to prevent the soil from falling into the trench.

[0037] In another embodiment, a drive cylinder is installed on the top of the housing 101. By having the drive cylinder directly drive the carrier plate 102 to adjust its position, the workload of the operator in rotating the threaded rod is reduced, making the movement of the carrier plate 102 smoother and improving the trenching efficiency of hard soil layers.

[0038] The actuating mechanism 2 further includes: a rotating rod 202, which is cylindrical in shape and has a limit block installed at its top. The rotating rod 202 passes through the top of the main body 1, and its top is connected to the top of the main body 1 via a spring; a slider 203, which is annular in shape and has its outer side slidably mounted inside the slide groove 201 via a spring; a vertical rod 204, which is cylindrical in shape and has its bottom slidably mounted inside the slider 203, with a limit block installed at its top; and a lever plate 205, which has a slot on its outer side and its top is connected to the bottom of the rotating rod 202 and the vertical rod 204. During the construction of water conservancy projects, when trenching is carried out in hard soil layers, the top of the rotating rod 202 moves downward under the action of the spring, causing the bottom of the rotating rod 202 to place the lever 205 on the hard soil layer. Under the action of the spring, the slider 203 moves along the slide 201, causing the slider 203 to move the vertical rod 204, causing the bottom of the vertical rod 204 to move the lever 205, which in turn moves the rotating rod 202. The inclined lever 205 pushes the soil generated by trenching to a more distant position on both sides. The trenching on the side of the lever 205 improves the guiding effect, preventing the soil from being pushed back into the trench when laying pipes in water conservancy projects, ensuring the flatness of the trench, and facilitating the rapid laying of water conservancy project pipelines.

[0039] The cleaning mechanism 3 further includes: a drive rod 303, the inner end of which is equipped with a bevel gear, and two additional ends of the drive rod 303 are mounted on the top and bottom of the movable plate 302 via structural components, with the bevel gear at the inner end of the drive rod 303 meshing with the bevel gear at the motor output end on the outer side of the movable plate 302; a lever 304, the outer end of which has an arc-shaped structure, and the lever 304 has a cylindrical structure, with its inner end mounted on the outer side of the drive rod 303; a crossbar 305, which has a cylindrical structure and is mounted on the inner side of the movable plate 302, with a return spring ring mounted on the outer side of the crossbar 305; and a cleaning plate 306, with a wire brush mounted on its outer side. The cleaning plate 306 is slidably installed on the outside of the crossbar 305, and the side end of the crossbar 305 is connected to the return spring on the outside of the crossbar 305. A protrusion is provided on the inner side of the cleaning plate 306, and a lever 304 is slidably installed on the side of the protrusion on the inner side of the cleaning plate 306. The positioning plate 307 is circular, with an opening in the middle. A connecting rod is installed on the inner edge of the positioning plate 307, and the connecting rod on the inner edge of the positioning plate 307 is installed on the inner side of the side end of the movable plate 302. A guide rod 308 is slidably installed in the opening in the middle of the positioning plate 307, and the inner end of the guide rod 308 is connected to the inner side of the positioning plate 307. The sliding end is installed inside the guide groove 105. During the construction of the water conservancy project, after the hard soil layer is grooved, the threaded rod at the top of the carrier plate 102 drives the carrier plate 102 to move upward, so that the bottom of the carrier plate 102 drives the rotating part 104 to the middle position of the top groove of the main body 1. The movable plate 302 moves in the groove at the top of the main body 1, so that the protrusions on both sides of the movable plate 302 move along the transverse groove 301, so that the positioning plate 307 on the inner side of the side of the movable plate 302 is placed on both sides of the rotating part 104. Under the action of the spring, the outer end of the guide rod 308 is inserted into the guide groove 105. The motor at the top of the carrier plate 102 drives the rotating part 104 to move slowly, so that the guide rod 308 is inserted into the guide groove 105 and drives the movable plate 302 to move upward. The protrusions on both sides of the 02 move back and forth along the transverse groove 301, reducing the direct contact between the wire brush on the outer side of the cleaning plate 306 and the outer side of the rotating part 104. The bevel gear at the output end of the motor on the outer side of the movable plate 302 drives the two drive rods 303 to rotate in opposite directions on the inner side of the movable plate 302. This causes the drive rods 303 to drive the inner end of the lever 304 to push the protrusions on the inner side of the cleaning plate 306 to move, so that the cleaning plate 306 moves along the crossbar 305. Under the action of the return spring on the outer side of the crossbar 305, the cleaning plate 306 moves back and forth. The wire brush on the outer side of the cleaning plate 306 cleans the dirt on the outer side of the rotating part 104, preventing the dirt from drying and hardening and affecting the sharpness of the grooving of the rotating part 104, thus ensuring the normal grooving operation of the rotating part 104 next time.

[0040] The specific usage and function of this embodiment: In this invention, when trenching hard soil layers during the construction of water conservancy projects, the height of the marker plate 107 is first adjusted according to the required trenching depth. The threaded rod at the top of the support 106 rotates, causing the support 106 to move. Simultaneously, the support 106 moves the guide plate 108 to a suitable position. The motor at the top of the carrier plate 102 drives the rotating component 104 to rotate at the bottom of the carrier plate 102 via a chain assembly to trench the hard soil layer. The threaded rod at the top of the housing 101 drives the carrier plate 102, causing the rotating component 104 to move downwards to trench, thus positioning the marker plate 107 at the trenching depth of the rotating component 104. The guide plate 108 guides the soil generated by the trenching of the rotating component 104 to both sides. Under the action of the spring, the rotating rod 202 drives the lever 205 to be placed on the hard soil layer. Under the action of the spring, the slider 203 drives the vertical rod 204 to move along the chute 201. The bottom of the vertical rod 204... The actuating plate 205 drives the rotating rod 202 to move. The actuating plate 205 pushes the soil generated by grooving to a more distant position on both sides. After grooving the hard soil layer, the carrier plate 102 drives the rotating component 104 to the middle position of the top grooving of the main body 1. The movable plate 302 moves in the grooving of the top of the main body 1, so that the positioning plate 307 is placed on both sides of the rotating component 104. Under the action of the spring, the outer end of the guide rod 308 is inserted into the guide groove 105. The motor at the top of the carrier plate 102 drives the rotating component 104 to move slowly. The motor on the outside of the movable plate 302 drives the two drive rods 303 to rotate in opposite directions. The drive rods 303 drive the inner end of the actuating rod 304 to push the cleaning plate 306 to move along the crossbar 305, so that the wire brush on the outside of the cleaning plate 306 cleans the soil on the outside of the rotating component 104, preventing the soil from hardening and affecting the sharpness of the grooving of the rotating component 104, and ensuring that the rotating component 104 can perform grooving work normally next time.

Claims

1. A trenching device for trenching around a pipe in hard soil, characterized in that include: The main body (1) has wheels rotatably mounted on its bottom and a slot on its top. A toggle mechanism (2) is mounted on the bottom of the main body (1). The toggle mechanism (2) includes a slide groove (201) which is arc-shaped and located on one side of the top of the main body (1). The cleaning mechanism (3) is mounted on the top of the main body (1) and includes a horizontal groove (301) and a movable plate (302). The horizontal groove (301) is located on both sides of the slot on the top of the main body (1). A motor is mounted on the outside of the movable plate (302), and a bevel gear is mounted on the output end of the motor. Protrusions are provided on both sides of the movable plate (302). The movable plate (302) is slidably mounted in the slot on the top of the main body (1), and the protrusions on both sides of the movable plate (302) are slidably mounted inside the horizontal groove (301).

2. A trenching device for embedding a pipe in hard earth as claimed in claim 1, wherein: The main body (1) includes: a housing (101), on the top of which a threaded rod is installed, and the housing (101) is installed on the top of the main body (1), and the bottom of the housing (101) is located on both sides of the slot on the top of the main body (1); a carrier plate (102), on the top of which a motor is installed, and the carrier plate (102) is slidably installed on the inner side of the housing (101) and in the slot on the top of the main body (1), and the middle position of the top of the carrier plate (102) is connected to the bottom end of the threaded rod on the top of the housing (101).

3. The hard-soil pipe-burying grooving apparatus according to claim 1, wherein: The main body (1) further includes: a positioning rod (103), which is a cylindrical structure, and the bottom of the positioning rod (103) is installed on both sides of the top of the carrier plate (102), and the top of the positioning rod (103) penetrates the top of the housing (101); a rotating component (104), which has a paddle on its outer side, and the side of the rotating component (104) is rotatably installed on the bottom of the carrier plate (102) through a rotating shaft, and the rotating shaft on the side of the rotating component (104) is connected to the motor output end at the top of the carrier plate (102) through a chain assembly.

4. The hard-soil pipe-burying grooving apparatus according to claim 1, wherein: The main body (1) further includes: a guide groove (105) provided on both sides of the rotating part (104); a bracket (106) on which a threaded rod is rotatably mounted, a drive handle is mounted on the bottom of the threaded rod, and the bracket (106) penetrates the bottom of the carrier plate (102), and the threaded rod on the top of the bracket (106) is rotatably mounted on both sides of the top of the carrier plate (102).

5. The trenching device for laying pipes in hard soil as described in claim 1, characterized in that: The main body (1) further includes: a label plate (107), which is installed at the bottom of the bracket (106) and is located on the outside of the rotating part (104); and a guide plate (108), which has an inclined structure on both sides of the top and is installed on the side of the label plate (107).

6. The trenching device for laying pipes in hard soil as described in claim 1, characterized in that: The actuating mechanism (2) further includes: a rotating rod (202), which is a cylindrical structure, and a limit block is installed on the top of the rotating rod (202), and the rotating rod (202) passes through the top of the main body (1), and the top of the rotating rod (202) is connected to the top of the main body (1) by a spring; and a slider (203), which is a ring structure, and the outer side of the slider (203) is slidably installed inside the slide groove (201) by a spring.

7. The trenching device for laying pipes in hard soil as described in claim 1, characterized in that: The actuating mechanism (2) further includes: a vertical rod (204), which is a cylindrical structure, and the bottom of the vertical rod (204) is slidably mounted on the inner side of the slider (203), and a limit block is installed on the top of the vertical rod (204); a lever plate (205), which has a slot on its outer side, and the top of the lever plate (205) is connected to the rotating rod (202) and the bottom end of the vertical rod (204).

8. The trenching device for laying pipes in hard soil as described in claim 4, characterized in that: The cleaning mechanism (3) further includes: a drive rod (303), the inner end of which is equipped with a bevel gear, and the additional ends of the two drive rods (303) are installed on the top and bottom of the movable plate (302) through structural components, and the bevel gear at the inner end of the drive rod (303) meshes with the bevel gear at the output end of the motor on the outer side of the movable plate (302); a lever (304), the outer end of which is an arc-shaped structure, and the lever (304) is a cylindrical structure, and the inner end of the lever (304) is installed on the outer side of the drive rod (303).

9. The trenching device for laying pipes in hard soil as described in claim 8, characterized in that: The cleaning mechanism (3) further includes: a crossbar (305), which is installed on the inner side of the movable plate (302), and a return spring is installed on the outer side of the crossbar (305); a cleaning plate (306), on the outer side of the cleaning plate (306) is a wire brush, and the cleaning plate (306) is slidably installed on the outer side of the crossbar (305), and the side end of the crossbar (305) is connected to the return spring on the outer side of the crossbar (305), and a protrusion is provided on the inner side of the cleaning plate (306), and a lever (304) is slidably installed on the side of the protrusion on the inner side of the cleaning plate (306).

10. The device for trenching pipes in hard soil as described in claim 9, characterized in that: The cleaning mechanism (3) further includes: a positioning plate (307), which has an opening in the middle and a connecting rod installed on the inner edge of the positioning plate (307), and the connecting rod on the inner edge of the positioning plate (307) is installed on the inner side of the side end of the movable plate (302); a guide rod (308), which is slidably installed in the opening in the middle of the positioning plate (307), and the inner end of the guide rod (308) is connected to the inner side of the positioning plate (307), and the inner end of the guide rod (308) is slidably installed inside the guide groove (105).

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