A new municipal pipeline trenching excavation auxiliary tool and trenching excavation method

Abstract

The application relates to the technical field of municipal pipeline construction, in particular to a novel municipal pipeline trenching and excavating auxiliary tool and a trenching and excavating method, which comprises a plurality of hand-held rods, the plurality of hand-held rods are connected through connecting mechanisms, a driving mechanism is installed on the hand-held rod located at an end, an L-shaped soil breaking spade is rotationally connected with the driving mechanism through an elastic self-locking mechanism, and an arc-shaped block is fixedly connected with a soil breaking end of the L-shaped soil breaking spade, so that the damage to the pipeline is reduced. The application has the effects of minimizing the damage to the underground pipeline, protecting the pipeline safety, and avoiding unnecessary losses and public opinion influence caused by the damage to the pipeline in the excavating process.

Description

Technical Field

[0001] This invention relates to the technical field of municipal pipeline construction, and in particular to a novel auxiliary tool and method for trench excavation in municipal pipelines. Background Technology

[0002] With the acceleration of urbanization and the continuous growth in demand for underground pipeline construction, the limitations of traditional trenching technology are becoming increasingly apparent. Currently, trenching for pipelines in municipal engineering, power and telecommunications, gas and heating, water supply and drainage, and other fields mainly faces the following core challenges: Urban development has led to a dramatic increase in the number and density of underground pipelines. Early pipelines lacked planning and accurate records, resulting in a chaotic mix with newly constructed pipelines. Due to numerous limitations in early geophysical exploration, the burial depth and direction of underground pipelines are unknown. Rashly using large machinery for excavation can easily damage existing pipelines, causing unnecessary economic losses and public opinion impacts. In severe cases, it may lead to work stoppage orders, seriously affecting construction progress and operational safety.

[0003] Traditional trench excavation relies on manual labor, using tools such as shovels and picks. This method is inefficient and can easily damage underground pipelines. A skilled worker can only complete 1-2 standard trenches (5 meters long, 1 meter wide, and 1.5 meters deep) per day. The labor intensity is high, making it impossible to meet the progress of large-scale projects. Furthermore, traditional excavation methods are difficult to deal with the complex and poorly informed pipeline layouts in urban areas. Summary of the Invention

[0004] In order to improve the efficiency of trench excavation and reduce the probability of damage to underground pipelines, this application provides a new auxiliary tool and method for trench excavation of municipal pipelines.

[0005] Firstly, this application provides a novel auxiliary tool for municipal pipeline trench excavation, which adopts the following technical solution: A novel auxiliary tool for trenching and excavation of municipal pipelines includes multiple hand grips connected by a connecting mechanism. A drive mechanism is installed on each hand grip at one end, and an L-shaped hoe is rotatably connected to the drive mechanism via an elastic self-locking mechanism. An arc-shaped block is fixedly connected to the hoe's breaking end to reduce damage to the pipeline.

[0006] By adopting the above technical solution, when excavating a trench, the hand holds the handle and then the breaking end of the L-shaped hoe is placed against the ground to be excavated. At this time, the drive mechanism drives the L-shaped hoe to rotate 90° through the elastic self-locking mechanism, thereby achieving the soil breaking effect. Compared with traditional trench excavation tools, the advantages of multiple tools make it easier to excavate a trench. When it is found that there are no pipelines at that depth, a comprehensive decision can be made on site, and with the assistance of a small excavator, the trench can be excavated more quickly and efficiently. Under the premise of reducing pipeline safety, the excavation efficiency is improved, and labor costs are saved. Under the same manpower and material resources, the underground pipeline exploration speed can be completed more efficiently, and the safety of underground pipelines can be guaranteed to the maximum extent. Moreover, compared with other trench excavation tools, the L-shaped hoe has no sharp structure, and its breaking end is fixedly connected to an arc-shaped block, which can minimize damage to underground pipelines, protect pipeline safety, and avoid unnecessary losses and public opinion impact caused by pipeline damage during excavation.

[0007] Optionally, the elastic self-locking mechanism includes a connector, which is mounted on the handle via the drive mechanism. A fixing block is fixedly connected inside the connector. A forward groove is formed on both sides of the fixing block. A rising groove is formed at one end of the forward groove, a self-locking groove is formed at one end of the rising groove, and a return groove is formed at one end of the self-locking groove. The return groove communicates with the forward groove. A rotating shaft is rotatably connected to both sides of the inner sidewalls of the connector. The end of the rotating shaft away from the connector is fixedly connected to the L-shaped hoe. A first sliding groove is formed on both inner sidewalls of the L-shaped hoe. A first slider is slidably connected in the forward groove, and a second slider is slidably connected in the first sliding groove. The first slider and the second slider are fixedly connected via a connecting rod, which is connected to the drive mechanism.

[0008] By adopting the above technical solution, when excavating the trench, the drive mechanism drives the connecting rod to slide, and the connecting rod simultaneously drives the first slider and the second slider to slide. The first slider passes through the forward groove into the rising groove, and then through the rising groove into the self-locking groove. At this time, the second slider slides from one end of the first groove to the other. At this point, the L-shaped hoe and the handle form a 90° angle. After the first slider moves to the self-locking groove, it is hooked by the connecting rod through the self-locking groove, preventing it from returning to its original position. The first slider is locked in this position, causing the handle to... Pulling the tool backward at an angle horizontal to the ground causes the L-shaped shovel to break through the soil surface and dig a small trench. Then, the drive rod continues to drive the connecting rod, which in turn moves the first slider from the self-locking groove to the return groove, and then back to the forward groove. At this point, the second slider slides from one end of the first groove to the other, and the L-shaped shovel resets, completing one digging operation. This achieves automatic soil breaking with the L-shaped shovel, reducing the probability of damage to pipelines or failure to break the ground due to insufficient force control during manual operation, and improving the overall construction efficiency.

[0009] Optionally, the drive mechanism includes a mounting rod, which is mounted on the handle near the L-shaped hoe by a fixing assembly. The mounting rod has a mounting groove, and the end of the mounting rod away from the handle is fixedly connected to the connector. An electric push rod is fixedly connected in the mounting groove, and a third slider is slidably connected in the mounting groove. The third slider is fixedly connected to the piston shaft of the electric push rod, and a drive rod is hinged to the end of the third slider away from the electric push rod. The end of the drive rod away from the third slider is rotatably connected to the connector.

[0010] By adopting the above technical solution, when the connecting rod slides, the electric push rod is activated, which drives the third slider to slide, the third slider drives the drive rod to slide, and the drive rod drives the connecting rod to slide, thereby realizing the automatic rotation of the L-shaped soil-breaking hoe. It also facilitates trenching on hard soil surfaces and improves the applicability of the entire device for trenching on various soil types.

[0011] Optionally, a slot is provided on the end face of the handle near the L-shaped hoe, and the fixing component includes a plug rod, which is fixedly connected to the end face of the mounting rod near the handle rod, with one end of the plug rod inserted into the slot.

[0012] By adopting the above technical solution, the setting of the insertion rod realizes the detachable connection of the installation rod, and thus realizes the detachable connection of the L-shaped breaking hoe, which makes it easy to replace different L-shaped breaking hoes according to the required trench size, and also makes it easy to replace damaged L-shaped breaking hoes.

[0013] Optionally, limiting grooves are formed on the side walls at both ends of the insertion rod. The fixing assembly also includes a limiting member, which includes two fixing seats. The two fixing seats are fixedly connected to the handle and are symmetrically arranged. A second sliding groove is also provided on the end face of the fixing seat away from the handle. A third sliding groove is formed on the bottom wall of the second sliding groove. A sliding rod is slidably connected in the second sliding groove and the third sliding groove. A connecting ring is fixedly connected to the side wall of the sliding rod. The connecting ring is located in the third sliding groove. A spring is fixedly connected to the bottom wall of the third sliding groove. The other end of the spring is fixedly connected to the connecting ring. An arc-shaped limiting block is fixedly connected to one end of the sliding rod located in the slot. The arc-shaped limiting block is inserted into the limiting groove.

[0014] By adopting the above technical solution, the arc-shaped limiting block reduces the probability of the insertion rod sliding in the slot, thereby improving the stability of the L-shaped hoe during excavation and reducing the probability of the installation rod accidentally falling off.

[0015] Optionally, the connecting mechanism includes a connecting bolt, which is fixedly connected to one end of the grip bar, and a connecting nut is fixedly connected to the end of the grip bar away from the connecting bolt. Two adjacent grip bars are connected by the connecting bolt and the connecting nut.

[0016] By adopting the above technical solution, the connection bolts and nuts enable the connection between the hand grips, which facilitates the assembly of different numbers of hand grips according to the on-site construction environment, thereby enabling the adjustment of the hand grip length during operation and improving the applicability of the entire device.

[0017] Optionally, the handle away from the L-shaped hoe is threaded, and a handle is connected to the handle away from the L-shaped hoe via the thread.

[0018] By adopting the above technical solution, compared with directly pulling the handle at the tail end, pulling the auxiliary force handle can better apply force in the axial direction of the handle at the tail end to the trench excavation auxiliary tool, thereby driving the L-shaped shovel to break the soil, so as to expose the pipeline without damaging it.

[0019] On the other hand, this application also provides a novel method for excavating trenches for municipal pipelines, which adopts the following technical solution: A novel method for trench excavation for municipal pipelines includes the following steps: Step 1: Replace the handle and L-shaped hoe with the appropriate ones according to the on-site construction environment and the size of the trench to be excavated, and assemble them into shape; Step 2: Hold the handle and then place the breaking end of the L-shaped hoe against the ground to be excavated. At this time, the drive mechanism will rotate the L-shaped hoe 90° through the elastic self-locking mechanism, thereby achieving the breaking effect. Step 3: When the first slider enters the self-locking groove, the second slider slides from one end of the first groove to the other end. At this time, the L-shaped hoe and the handle form a 90° angle. After the first slider moves to the self-locking groove, it cannot return to its original position because the connecting rod hooks the first slider into the self-locking groove. The first slider is locked in this position. Then, the handle is pulled back at an angle horizontal to the ground. The L-shaped hoe breaks through the soil surface and digs a small trench. Step 4: Then the drive rod continues to drive the connecting rod to move. The connecting rod drives the first slider to slide from the self-locking groove to the return groove, and then slides back to the forward groove through the return groove. At this time, the second slider slides from one end of the first groove to the other end again, and the L-shaped hoe is reset, realizing one digging.

[0020] In summary, this application includes the following beneficial technical effects: 1. When excavating a trench, hold the handle and then place the breaking end of the L-shaped hoe against the ground to be excavated. At this time, the drive mechanism drives the L-shaped hoe to rotate 90° through the elastic self-locking mechanism, thereby achieving the soil breaking effect. Compared with traditional trench excavation tools, the advantages of multiple tools make it easier to excavate a trench. When it is found that there are no pipelines at this depth, a comprehensive decision can be made on site, and with the assistance of a small excavator, the trench can be excavated more quickly and efficiently. It improves excavation efficiency and saves labor costs while reducing pipeline safety. Under the same manpower and material resources, it can complete the underground pipeline exploration more efficiently and maximize the safety of underground pipelines. Moreover, compared with other trench excavation tools, the L-shaped hoe has no sharp structure, and its breaking end is fixedly connected to an arc-shaped block, which can minimize damage to underground pipelines, protect pipeline safety, and avoid unnecessary losses and public opinion impact caused by pipeline damage during excavation. 2. During trench excavation, the drive mechanism drives the connecting rod to slide, which in turn drives the first and second sliders to slide. The first slider passes through the forward groove into the rising groove, and then through the rising groove into the self-locking groove. Simultaneously, the second slider slides from one end of the first groove to the other. At this point, the L-shaped hoe and the handle form a 90° angle. After the first slider reaches the self-locking groove, it is hooked by the connecting rod and cannot return to its original position; it is locked in this position. This allows the handle to remain horizontal to the ground. Pulling the tool backward at an angle causes the L-shaped shovel to break through the soil surface and dig a small trench. Then, the drive rod continues to move the connecting rod, which in turn moves the first slider from the self-locking groove to the return groove, and then back to the forward groove. At this point, the second slider slides from one end of the first groove to the other, resetting the L-shaped shovel and completing one digging operation. This achieves automatic soil breaking with the L-shaped shovel, reducing the probability of damage to pipelines or failure to break the ground due to insufficient force control during manual operation, and improving the overall construction efficiency. 3. The connection bolts and nuts enable the connection between the hand grips, which facilitates the assembly of different numbers of hand grips according to the on-site construction environment, thereby allowing for adjustment of the hand grip length during operation and improving the applicability of the entire device; 4. Compared to directly pulling the handle at the end, pulling the auxiliary force handle can better apply force along the axis of the handle at the end of the trench excavation tool, thereby driving the L-shaped shovel to break through the soil, so as to expose the pipeline without damaging it. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the novel municipal pipeline trenching auxiliary tool in the embodiments of this application; Figure 2 This is a top sectional view of the elastic self-locking mechanism in the embodiments of this application; Figure 3 This is a schematic diagram of the structure when the first slider is located in the self-locking groove in an embodiment of this application; Figure 4 This is a schematic diagram of the structure when the first slider is located in the forward groove in an embodiment of this application; Figure 5 This is a cross-sectional view of the drive mechanism in an embodiment of this application; Figure 6 For this application Figure 5 Enlarged view of section A; Figure 7 This is an exploded view of the connecting mechanism in the embodiments of this application.

[0022] Reference numerals: 1. Hand grip; 11. Slot; 12. Thread; 2. L-shaped hoe; 21. Arc-shaped block; 22. First groove; 3. Elastic self-locking mechanism; 31. Connector; 32. Fixing block; 321. Forward groove; 322. Rising groove; 323. Self-locking groove; 324. Return groove; 33. Rotating shaft; 34. First slider; 35. Second slider; 36. Connecting rod; 4. Drive mechanism; 41. Anchor. 411. Mounting rod; 42. Electric push rod; 43. Third slider; 44. Drive rod; 45. Fixing assembly; 451. Insert rod; 452. Fixing seat; 453. Slide rod; 454. Connecting ring; 455. Spring; 456. Arc-shaped limiting block; 457. Limiting groove; 458. Second slide groove; 459. Third slide groove; 5. Connecting mechanism; 51. Connecting bolt; 52. Connecting nut; 6. Handle. Detailed Implementation

[0023] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0024] This application discloses a novel auxiliary tool for trench excavation of municipal pipelines.

[0025] refer to Figure 1 A new type of auxiliary tool for trenching and excavation of municipal pipelines includes multiple hand grips 1, which are connected by a connecting mechanism 5. A drive mechanism 4 is installed on the hand grips 1 at the end. An L-shaped hoe 2 is rotatably connected to the drive mechanism 4 through an elastic self-locking mechanism 3. An arc-shaped block 21 is fixedly connected to the breaking end of the L-shaped hoe 2 to reduce damage to the pipeline.

[0026] When excavating a trench, hold the handle 1 and then place the breaking end of the L-shaped shovel 2 against the ground to be excavated. At this time, the drive mechanism 4 drives the L-shaped shovel 2 to rotate 90° through the elastic self-locking mechanism 3, thereby achieving the soil breaking effect. Compared with traditional trench excavation tools, the advantages of multiple tools make it easier to excavate a trench. When it is found that there are no pipelines at this depth, a comprehensive decision can be made on site, and with the assistance of a small excavator, the trench can be excavated more quickly and efficiently. Under the premise of reducing pipeline safety, the excavation efficiency is improved, and the labor cost is saved. Under the same manpower and material resources, the underground pipeline exploration speed can be completed more efficiently, and the safety of underground pipelines can be guaranteed to the maximum extent. Moreover, compared with other trench excavation tools, the L-shaped shovel 2 has no sharp structure. Its breaking end is fixedly connected with an arc-shaped block 21, which can minimize damage to underground pipelines, protect pipeline safety, and avoid unnecessary losses and public opinion impact caused by pipeline damage during the excavation process.

[0027] refer to Figure 2 , Figure 3 and Figure 4The elastic self-locking mechanism 3 includes a connector 31, which is mounted on the handle 1 via a drive mechanism 4. A fixing block 32 is fixedly connected inside the connector 31. A forward groove 321 is provided on both sides of the fixing block 32. A rising groove 322 is provided at one end of the forward groove 321. A self-locking groove 323 is provided at one end of the rising groove 322. A return groove 324 is provided at one end of the self-locking groove 323. The return groove 324 communicates with the forward groove 321. A rotating shaft 33 is rotatably connected to the inner sidewalls on both sides of the connector 31. The end of the rotating shaft 33 away from the connector 31 is fixedly connected to the L-shaped hoe 2. A first sliding groove 22 is provided on both inner sidewalls of the L-shaped hoe 2. A first slider 34 is slidably connected in the forward groove 321. A second slider 35 is slidably connected in the first sliding groove 22. The first slider 34 and the second slider 35 are fixedly connected via a connecting rod 36, which is connected to the drive mechanism 4.

[0028] During trench excavation, the drive mechanism 4 drives the connecting rod 36 to slide. Simultaneously, the connecting rod 36 drives the first slider 34 and the second slider 35 to slide. The first slider 34 passes through the forward groove 321 into the rising groove 322, and then through the rising groove 322 into the self-locking groove 323. At the same time, the second slider 35 slides from one end of the first groove 22 to the other. At this point, the L-shaped hoe 2 and the handle 1 form a 90° angle. After the first slider 34 reaches the self-locking groove 323, it is hooked by the connecting rod 36, preventing it from returning to its original position. The first slider 34 is locked in this position, thus preventing the handle from moving. The lever 1 is pulled backward at an angle horizontal to the ground, causing the L-shaped hoe 2 to break through the soil surface and dig a small trench. Then, the drive lever 44 continues to drive the connecting lever 36 to move. The connecting lever 36 drives the first slider 34 to slide from the self-locking groove 323 to the return groove 324, and then slides back to the forward groove 321 through the return groove 324. At this time, the second slider 35 slides from one end of the first groove 22 to the other end, and the L-shaped hoe 2 resets, completing one digging operation. This achieves automatic soil breaking by the L-shaped hoe 2, reducing the probability of damage to pipelines and failure to break the ground due to insufficient force control during manual operation, and improving the construction efficiency of the entire construction process.

[0029] refer to Figure 5The drive mechanism 4 includes a mounting rod 41, which is mounted on the handle 1 near the L-shaped hoe 2 via a fixing assembly 45. The mounting rod 41 has a mounting groove 411. The end of the mounting rod 41 away from the handle 1 is fixedly connected to the connector 31. An electric push rod 42 is fixedly connected in the mounting groove 411. A third slider 43 is also slidably connected in the mounting groove 411. The third slider 43 is fixedly connected to the piston shaft of the electric push rod 42. A drive rod 44 is hinged to the end of the third slider 43 away from the electric push rod 42. The end of the drive rod 44 away from the third slider 43 is rotatably connected to the connecting rod 36.

[0030] When the connecting rod 36 slides, the electric push rod 42 is activated, which drives the third slider 43 to slide. The third slider 43 drives the drive rod 44 to slide, which in turn drives the connecting rod 36 to slide. This enables the L-shaped hoe 2 to rotate automatically and facilitates trenching on hard soil surfaces, improving the applicability of the entire device for trenching on various soil types.

[0031] refer to Figure 6 A slot 11 is provided on the end face of the handle 1 near the L-shaped hoe 2. The fixing component 45 includes a rod 451, which is fixedly connected to the end face of the mounting rod 41 near the handle 1. One end of the rod 451 is inserted into the slot 11. Limiting grooves 457 are provided on the side walls at both ends of the rod 451. The fixing component 45 also includes a limiting member, which includes two fixing seats 452. The two fixing seats 452 are fixedly connected to the handle 1 and are symmetrically arranged. A second fixing seat 452 is provided on the end face away from the handle 1. A second slide groove 458 has a third slide groove 459 on its bottom wall. A slide rod 453 is slidably connected in both the second and third slide grooves 458 and 459. A connecting ring 454 is fixedly connected to the side wall of the slide rod 453 and is located in the third slide groove 459. A spring 455 is fixedly connected to the bottom wall of the third slide groove 459 and is fixedly connected to the other end of the spring 455 and the connecting ring 454. An arc-shaped limiting block 456 is fixedly connected to one end of the slide rod 453 in the slot 11 and is inserted into the limiting groove 457.

[0032] The insertion rod 451 enables the detachable connection of the mounting rod 41, and thus the detachable connection of the L-shaped hoe 2. This facilitates the replacement of different L-shaped hoe 2 according to the required trench size, and also makes it easy to replace damaged L-shaped hoe 2. The arc-shaped limiting block 456 reduces the probability of the insertion rod 451 sliding in the slot 11, thereby improving the stability of the L-shaped hoe 2 during excavation and reducing the probability of the mounting rod 41 accidentally falling off.

[0033] refer to Figure 7The connecting mechanism 5 includes a connecting bolt 51, which is fixedly connected to one end of the hand grip 1. A connecting nut 52 is fixedly connected to the end of the hand grip 1 away from the connecting bolt 51. Two adjacent hand grips 1 are connected by the connecting bolt 51 and the connecting nut 52.

[0034] The connection bolts 51 and the connecting nuts 52 enable the connection between the hand grips 1, which facilitates the assembly of different numbers of hand grips 1 according to the on-site construction environment, thereby enabling the adjustment of the hand grip length during operation and improving the applicability of the entire device.

[0035] A threaded handle 12 is provided on the handle 1 away from the L-shaped hoe 2, and a handle 6 is connected to the handle 1 away from the L-shaped hoe 2 via the threaded handle 12. Compared with directly pulling the handle 1 at the tail end, pulling the auxiliary force handle 6 can better apply the force in the axial direction of the handle 1 at the tail end to the trench excavation auxiliary tool, thereby driving the L-shaped hoe 2 to break through the soil, so as to expose the pipeline without damaging the pipeline.

[0036] This application also discloses a novel method for trench excavation for municipal pipelines.

[0037] A new method for trenching municipal pipelines includes the following steps: Step 1: Replace the corresponding hand grip 1 and L-shaped hoe 2 according to the on-site construction environment and the size of the trench to be excavated, and assemble them into shape; Step 2: Hold the handle 1 and then place the breaking end of the L-shaped hoe 2 against the ground to be excavated. At this time, the drive mechanism 4 drives the L-shaped hoe 2 to rotate 90° through the elastic self-locking mechanism 3, thereby achieving the breaking effect. Step 3: When the first slider 34 enters the self-locking groove 323, the second slider 35 slides from one end of the first groove 22 to the other end. At this time, the L-shaped hoe 2 and the handle 1 form a 90° angle. After the first slider 34 moves to the self-locking groove 323, it cannot be reset because the connecting rod 36 hooks the first slider 34 into the self-locking groove 323. The first slider 34 is locked in this position. Then, the handle 1 is pulled backward at an angle horizontal to the ground. The L-shaped hoe 2 breaks the soil surface and digs a small trench. Step 4: Then the drive rod 44 continues to drive the connecting rod 36 to move. The connecting rod 36 drives the first slider 34 to slide from the self-locking groove 323 to the return groove 324, and then slides back to the forward groove 321 through the return groove 324. At this time, the second slider 35 slides from one end of the first groove 22 to the other end again, and the L-shaped soil-breaking hoe 2 is reset, realizing one digging.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel auxiliary tool for trench excavation of municipal pipelines, characterized in that, It includes multiple hand grips (1), all of which are connected by a connecting mechanism (5). A drive mechanism (4) is installed on the hand grip (1) at the end. An L-shaped hoe (2) is rotatably connected to the drive mechanism (4) through an elastic self-locking mechanism (3). An arc-shaped block (21) is fixedly connected to the breaking end of the L-shaped hoe (2) to reduce damage to the pipeline.

2. The novel municipal pipeline trenching auxiliary tool according to claim 1, characterized in that, The elastic self-locking mechanism (3) includes a connector (31), which is mounted on the handle (1) via the drive mechanism (4). A fixing block (32) is fixedly connected inside the connector (31). A forward groove (321) is provided on both sides of the sidewall of the fixing block (32). A rising groove (322) is provided at one end of the forward groove (321), a self-locking groove (323) is provided at one end of the rising groove (322), and a return groove (324) is provided at one end of the self-locking groove (323). The return groove (324) communicates with the forward groove (321). Rotating shafts (33) are rotatably connected to the inner walls on both sides of the connector (31). The end of the rotating shaft (33) away from the connector (31) is fixedly connected to the L-shaped hoe (2). The two inner walls of the L-shaped hoe (2) are provided with first sliding grooves (22). A first slider (34) is slidably connected in the forward groove (321). A second slider (35) is slidably connected in the first sliding groove (22). The first slider (34) and the second slider (35) are fixedly connected by a connecting rod (36). The connecting rod (36) is connected to the driving mechanism (4).

3. The novel municipal pipeline trenching auxiliary tool according to claim 2, characterized in that, The drive mechanism (4) includes a mounting rod (41), which is mounted on the handle (1) near the L-shaped hoe (2) via a fixing component (45). The mounting rod (41) has a mounting groove (411) inside. The end of the mounting rod (41) away from the handle (1) is fixedly connected to the connector (31). An electric push rod (42) is fixedly connected in the mounting groove (411). A third slider (43) is also slidably connected in the mounting groove (411). The third slider (43) is fixedly connected to the piston shaft of the electric push rod (42). A drive rod (44) is hinged to the end of the third slider (43) away from the electric push rod (42). The end of the drive rod (44) away from the third slider (43) is rotatably connected to the connecting rod (36).

4. The novel municipal pipeline trenching auxiliary tool according to claim 3, characterized in that, A slot (11) is provided on the end face of the handle (1) near the L-shaped hoe (2). The fixing component (45) includes a plug (451), which is fixedly connected to the end face of the mounting rod (41) near the handle (1). One end of the plug (451) is inserted into the slot (11).

5. The novel municipal pipeline trenching auxiliary tool according to claim 4, characterized in that, Limiting grooves (457) are provided on the side walls at both ends of the insertion rod (451). The fixing component (45) also includes a limiting member, which includes two fixing seats (452). The two fixing seats (452) are fixedly connected to the handle (1) and are arranged symmetrically. A second sliding groove (458) is provided on the end face of the fixing seat (452) away from the handle (1). A third sliding groove (459) is provided on the bottom wall of the second sliding groove (458). The second sliding groove (458) and the third sliding groove (459) slide together. A sliding rod (453) is movably connected, and a connecting ring (454) is fixedly connected to the side wall of the sliding rod (453). The connecting ring (454) is located in the third sliding groove (459). A spring (455) is fixedly connected to the bottom wall of the third sliding groove (459). The other end of the spring (455) is fixedly connected to the connecting ring (454). An arc-shaped limiting block (456) is fixedly connected to one end of the sliding rod (453) located in the slot (11). The arc-shaped limiting block (456) is inserted into the limiting groove (457).

6. The novel municipal pipeline trenching auxiliary tool according to claim 1, characterized in that, The connecting mechanism (5) includes a connecting bolt (51), which is fixedly connected to one end of the hand grip (1). A connecting nut (52) is fixedly connected to the end of the hand grip (1) away from the connecting bolt (51). Two adjacent hand grips (1) are connected by the connecting bolt (51) and the connecting nut (52).

7. The novel municipal pipeline trenching auxiliary tool according to claim 1, characterized in that, A threaded (12) is provided on the handle (1) away from the L-shaped hoe (2), and a handle (6) is connected to the handle (1) away from the L-shaped hoe (2) via the threaded (12).

8. A novel method for trench excavation for municipal pipelines, characterized in that, The excavation of a trench using the novel municipal pipeline trench excavation auxiliary tool as described in claim 3 includes the following steps: Step 1: Replace the corresponding hand grip (1) and L-shaped hoe (2) according to the on-site construction environment and the size of the trench to be excavated, and assemble them into shape; Step 2: Hold the handle (1) and then place the breaking end of the L-shaped breaking hoe (2) against the ground to be excavated. At this time, the drive mechanism (4) drives the L-shaped breaking hoe (2) to rotate 90° through the elastic self-locking mechanism (3), thereby achieving the breaking effect. Step 3: When the first slider (34) enters the self-locking groove (323), the second slider (35) slides from one end of the first groove (22) to the other end. At this time, the L-shaped hoe (2) and the handle (1) form a 90° angle. After the first slider (34) moves to the self-locking groove (323), the first slider (34) cannot be reset because the connecting rod (36) hooks the self-locking groove (323) through the first slider (34). The first slider (34) is locked in this position. Then the handle (1) pulls the tool backward at an angle horizontal to the ground. The L-shaped hoe (2) breaks the soil surface and digs a small trench. Step 4: Then the drive rod (44) continues to drive the connecting rod (36) to move. The connecting rod (36) drives the first slider (34) to slide from the self-locking groove (323) to the return groove (324), and then slides back to the forward groove (321) through the return groove (324). At this time, the second slider (35) slides from one end of the first groove (22) to the other end again, and the L-shaped hoe (2) is reset, realizing one digging.

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