Pipe jacking machine for non-excavation pipeline construction under complex geological conditions

Abstract

The invention discloses a pipe jacking machine for trenchless pipeline construction under complex geological conditions, and relates to the technical field of trenchless pipeline construction, the pipe jacking machine comprises a barrel and a drill bit mechanism rotationally connected with the barrel, the drill bit mechanism comprises a drill bit seat, a first cutter assembly, a second cutter assembly, a third cutter assembly, a driving rod and a driving disc, the drill bit seat is rotatably arranged on the cylinder body, four cutter storage cavities are circumferentially formed in the drill bit seat, two driving rods are slidably arranged in the cutter storage cavities, and two first cutter assemblies and two third cutter assemblies are fixedly arranged on the two driving rods in the two cutter storage cavities located in the vertical position correspondingly; two second cutter assemblies and two third cutter assemblies are fixedly arranged on the two driving rods in the two cutter storage cavities in the horizontal direction correspondingly, spacing plates are fixedly arranged in the cutter storage cavities, and driving discs used for driving the driving rods to slide are rotationally arranged in the spacing plates; and the drilling efficiency of the pipe jacking machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of trenchless pipeline construction, and specifically to a pipe jacking machine for trenchless pipeline construction under complex geological conditions. Background Technique

[0002] A pipe jacking machine for trenchless pipeline construction is a special equipment for underground pipeline laying. Its core function is to complete pipeline installation without excavating the ground surface through mechanical jacking. In the field of trenchless pipeline construction, the pipe jacking machine needs to cope with complex and changeable engineering geological conditions (such as rock formations, soft soils, gravel layers, composite strata, etc.). Traditional pipe jacking machines mostly adopt fixed cutter configurations, which makes the pipe jacking machine unable to meet the drilling needs of different geological conditions. Therefore, different cutters need to be replaced according to different geological environments during drilling to complete the entire drilling work.

[0003] Currently, most of the cutter switching is carried out manually by workers. That is, after the pipe jacking machine is shut down, workers carry out the switching. This method is time-consuming and laborious, has potential safety hazards, and the switching efficiency is low, especially when operating in narrow underground spaces. That is, traditional pipe jacking machines have poor cutter adaptability, low switching efficiency, and low drilling efficiency under complex geological conditions, thus slowing down the progress of the entire pipeline construction.

[0004] Therefore, it is necessary to provide a pipe jacking machine for trenchless pipeline construction under complex geological conditions to solve the problems raised in the above background technique. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: A pipe jacking machine for trenchless pipeline construction under complex geological conditions, including a cylinder body and a drill bit mechanism rotatably connected to the cylinder body. The drill bit mechanism includes a drill bit seat, a first cutter assembly, a second cutter assembly, a third cutter assembly, a driving rod, and a driving disk. Among them, the drill bit seat is rotatably arranged on the cylinder body. Four cutter receiving cavities are circumferentially formed on the drill bit seat. Two driving rods are slidably arranged in the cutter receiving cavities. Two first cutter assemblies and third cutter assemblies are respectively fixedly arranged on the two driving rods in the two cutter receiving cavities located in the vertical position. Two second cutter assemblies and third cutter assemblies are respectively fixedly arranged on the two driving rods in the two cutter receiving cavities located in the horizontal direction. A partition plate is fixedly arranged in the cutter receiving cavity. A driving disk for driving the driving rod to slide is rotatably arranged in the partition plate, and a hydraulic telescopic rod is hinged between the driving disk and the partition plate.

[0006] Preferably, the first cutter assembly includes a cutter seat one and a hob. Among them, the cutter seat one is fixedly arranged on the driving rod, and two groups of hobs are rotatably arranged on the cutter seat one; The second tool assembly includes a second tool holder and a toothed cutter. Among them, the second tool holder is fixedly arranged on the driving rod, and two groups of toothed cutters are rotatably arranged on the second tool holder; The third tool assembly includes a third tool holder and a scraper. Among them, the third tool holder is fixedly arranged on the driving rod, and two groups of scrapers are fixedly arranged on the third tool holder.

[0007] Preferably, guide blocks are fixedly arranged at both ends of the driving rod, and a guide rod is fixedly arranged in the middle of the driving rod; Two first guide rails are provided on the upper and lower end faces of the spacer plate and the tool storage cavity. The two guide blocks are respectively slidably arranged along the first guide rails on the upper and lower end faces of the tool storage cavity, and the guide rod is slidably arranged along the first guide rail on the spacer plate.

[0008] Preferably, two guide grooves are provided on the driving disc; The guide rod penetrates through the spacer plate and is slidably arranged along the guide groove.

[0009] Preferably, two second guide rails are provided on the upper and lower end faces of the tool storage cavity and the spacer plate. Both the first guide rail and the second guide rail are composed of a straight groove and an inclined groove, and the length of the inclined groove in the horizontal direction is twice that of the straight groove. The straight groove and the inclined groove in the first guide rail are parallel to and have the same length as the straight groove and the inclined groove in the second guide rail.

[0010] Preferably, limit blocks are fixedly arranged on the first tool holder, the second tool holder and the third tool holder, and the limit blocks are slidably arranged along the second guide rail; Two rectangular stepped card slots are provided at the middle position of the output surface of the tool storage cavity; Card plates are fixedly arranged on the first tool holder, the second tool holder and the third tool holder, and the card plates can be fixedly clamped into the card slots.

[0011] Preferably, a central cutter head is fixed at the center position of the drill bit holder, and a plurality of auxiliary cutter blocks are fixedly arranged on the surface and the outer ring of the drill bit holder in a circumferential manner.

[0012] Compared with the prior art, the present invention provides a pipe jacking machine for trenchless pipeline construction under complex geological conditions, and has the following beneficial effects: The present invention provides a tool storage cavity on the drill bit base, enabling three different types of tool assemblies to be slidably stored in the tool storage cavity. That is, the first tool assembly is suitable for rocks, the second tool assembly is suitable for gravel, and the third tool assembly is suitable for soft soil. At the same time, a hydraulic telescopic rod is used to drive the driving disc to rotate, and combined with the linkage of the first guide rail and the guide groove, only a single rotation of the driving disc can complete the tool switching, thereby significantly reducing the time spent on tool switching. Furthermore, the pipe jacking machine can adapt to a variety of complex geological environments. The horizontal length of the inclined groove is set to be twice the length of the straight groove, so that the phase difference between the two tool assemblies during sliding switching is 50%, thus avoiding the phenomenon of tool jamming. In addition, a second guide rail parallel to the first guide rail is additionally provided. Through the sliding of the limiting block along the second guide rail and the sliding of the guide rod and the guide block along the first guide rail, the posture of the tool group assembly does not change during the sliding switching process, that is, it is ensured that the tool surface of the tool assembly can protrude from the drill bit base for drilling work and cooperate with the card slot for locking, so that the posture is stable after tool switching, thereby improving the drilling efficiency of the pipe jacking machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is Figure 1 an enlarged schematic diagram of the structure of part A in Figure 3 is Figure 1 an enlarged schematic diagram of the structure of part B in Figure 4 is a schematic diagram of the structure of the drill bit base in the present invention; Figure 5 is a schematic diagram of the structure of the first tool assembly in the present invention; Figure 6 is a schematic diagram of the structure of the second tool assembly in the present invention; Figure 7 is a schematic diagram of the structure of the third tool assembly in the present invention; In the figure: 1, cylinder body; 2, drill bit base; 21, tool storage cavity; 211, card slot; 22, spacer; 23, hydraulic telescopic rod; 24, first guide rail; 25, second guide rail; 26, center cutter head; 27, auxiliary cutter block; 3, first tool assembly; 31, tool seat one; 311, limiting block; 312, clamping plate; 32, hob; 4, second tool assembly; 41, tool seat two; 42, toothed cutter; 5, third tool assembly; 51, tool seat three; 52, scraper; 6, driving rod; 61, guide block; 62, guide rod; 7, driving disc; 71, guide groove. DETAILED DESCRIPTION OF THE INVENTION

[0014] Please refer to Figures 1 to 7, in the embodiment of the present invention, a pipe jacking machine for trenchless pipeline construction under complex geological conditions includes a cylinder body 1 and a drill bit mechanism rotatably connected to the cylinder body 1. The drill bit mechanism includes a drill bit base 2, a first tool assembly 3, a second tool assembly 4, a third tool assembly 5, a driving rod 6, and a driving disk 7. Among them, the drill bit base 2 is rotatably arranged on the cylinder body 1. Four tool receiving cavities 21 are circumferentially formed on the drill bit base 2. Two driving rods 6 are slidably arranged in the tool receiving cavities 21. Two first tool assemblies 3 and third tool assemblies 5 are respectively fixedly arranged on the two driving rods 6 in the two tool receiving cavities 21 in the vertical position. Two second tool assemblies 4 and third tool assemblies 5 are respectively fixedly arranged on the two driving rods 6 in the two tool receiving cavities 21 in the horizontal direction. A spacer plate 22 is fixedly arranged in the tool receiving cavity 21. A driving disk 7 for driving the driving rod 6 to slide is rotatably arranged in the spacer plate 22. A hydraulic telescopic rod 23 is hinged between the driving disk 7 and the spacer plate 22. It also includes a main jacking oil cylinder, a screw conveyor, a hinge oil cylinder, a housing mechanism, a pipe joint, an oil cylinder support, and a backrest. And the above structures are all necessary structures of the pipe jacking machine and belong to the prior art, so no further description will be given here; The first tool assembly 3 includes a tool seat one 31 and hob cutters 32. Among them, the tool seat one 31 is fixedly arranged on the driving rod 6, and two groups of hob cutters 32 are rotatably arranged on the tool seat one 31; The second tool assembly 4 includes a tool seat two 41 and tooth cutters 42. Among them, the tool seat two 41 is fixedly arranged on the driving rod 6, and two groups of tooth cutters 42 are rotatably arranged on the tool seat two 41; The third tool assembly 5 includes a tool seat three 51 and scraping cutters 52. Among them, the tool seat three 51 is fixedly arranged on the driving rod 6, and two groups of scraping cutters 52 are fixedly arranged on the tool seat three 51.

[0015] It should be noted that the width of the tool receiving cavity 21 is three times the widths of the tool seat one 31, the tool seat two 41, and the tool seat three 51. That is, when two groups of tools in the same tool receiving cavity 21 are respectively retracted to both sides of the tool receiving cavity 21, and when one tool is retracted into the tool receiving cavity 21, the other tool is located in the middle position of the tool receiving cavity 21 and protrudes from the tool receiving cavity 21. Therefore, setting the width of the tool receiving cavity 21 to three times the width of the tool seat enables the tool receiving cavity 21 to receive two groups of tools regardless of how the two groups of tools are switched.

[0016] During implementation, first select a suitable tool assembly for drilling according to the terrain requirements. That is, when encountering a geology with more rocks, extend the first tool assembly 3 out of the tool storage cavity 21, that is, use the hob 32 to break the rock formation, and at the same time carry out the drilling work through the cooperation of the auxiliary cutter block 27; when encountering soft soil, clay, silt and other soft strata, extend the third tool assembly 5 out of the tool storage cavity 21, that is, use the scraper 52 and the auxiliary cutter block 27 to carry out the drilling work; when encountering a gravel layer, pebble layer or soft-hard alternating strata, extend the second tool assembly 4 out of the tool storage cavity 21, that is, use the tooth cutter 42 to break the loose or cemented strata through impact and tearing; and when encountering a composite terrain, the first tool assembly 3, the second tool assembly 4 and the third tool assembly 5 can be selectively switched and combined to adapt to the composite terrain, that is, the drilling work can be completed without stopping to replace the tool.

[0017] In this embodiment, as Figure 4 and Figure 5 , guide blocks 61 are fixedly arranged at both ends of the driving rod 6, and a guide rod 62 is fixedly arranged in the middle of the driving rod 6; Two first guide rails 24 are provided on the upper and lower end faces of the spacer plate 22 and the tool storage cavity 21. The two guide blocks 61 are respectively arranged to slide along the first guide rails 24 on the upper and lower end faces of the tool storage cavity 21, and the guide rod 62 slides along the first guide rail 24 on the spacer plate 22; Two guide grooves 71 are provided on the driving disk 7; The guide rod 62 penetrates through the spacer plate 22 and is arranged to slide along the guide groove 71; Two second guide rails 25 are provided on the upper and lower end faces of the tool storage cavity 21 and the spacer plate 22. Both the first guide rail 24 and the second guide rail 25 are composed of a straight groove and an inclined groove, and the length of the inclined groove in the horizontal direction is twice that of the straight groove. The straight groove and the inclined groove in the first guide rail 24 are parallel to and have the same length as the straight groove and the inclined groove in the second guide rail 25.

[0018] It should be noted that when the driving disk 7 rotates, the two sets of tools located in the same tool storage cavity 21 will slide at the same time, that is, the two first tool assemblies 3 fixedly arranged on the same driving rod 6 and the two third tool assemblies 5 fixedly arranged on the same driving rod 6, or the second tool assembly 4 fixedly arranged on the same driving rod 6 and the two third tool assemblies 5 fixedly arranged on the same driving rod 6 will slide at the same time, and the card slot 211 is located in the middle position of the tool storage cavity 21. When the two sets of tools are switched, the tool needs to slide along the inclined groove until it coincides with the card slot 211, that is, slide to the middle position of the tool storage cavity 21 before it can be removed from the card slot 2 11, in order to prevent the two groups of tools from colliding when sliding, the horizontal length of the inclined groove is set to twice that of the straight groove, so that when the tool group located in the slot range slides to the inclined groove range, the tool group located in the inclined groove only slides half the distance, and then the recovered tool group slides along the inclined groove to the edge of the tool storage cavity 21, and the replaced tool group slides along the inclined groove to the center of the tool storage cavity 21. Due to the front and rear position difference between the two groups of tools, the two groups of tools will slide staggered, and the tool group will not be stuck, thereby ensuring that the tool can be switched by rotating only one drive disk 7, making the tool switching more convenient and quick.

[0019] In this embodiment, the tool holder 1 31 , the tool holder 2 41 and the tool holder 3 51 are all fixedly provided with a limit block 311 , and the limit block 311 is slidably provided along the second guide rail 25 ; Two rectangular stepped slots 211 are provided in the middle of the output surface of the tool storage chamber 21; The tool holder 1 31 , the tool holder 2 41 and the tool holder 3 51 are all fixedly provided with a clamping plate 312 , and the clamping plate 312 can be fixedly clamped into the clamping slot 211 .

[0020] During implementation, the hydraulic telescopic rod 23 drives the driving disk 7 to rotate, thereby causing the guide rod 62 to slide along the guide groove 71. At the same time, the guide rod 62 and the guide block 61 are restricted by the first guide rail 24, causing the driving rod 6 to slide along the first guide rail 24. As a result, the tool assembly located in the card slot 211 is retracted into the tool storage cavity 21, and another tool assembly located in the tool storage cavity 21 slides into the card slot 211 and is fixedly clamped with the drill head seat 2. Thus, the automatic switching of tools is achieved, that is, the drilling work under complex geological conditions can be completed without stopping the machine to manually switch tools, effectively improving the drilling efficiency. Moreover, during the process of the guide rod 62 and the guide block 61 sliding along the first guide rail 24, the limiting block 311 also slides along the second guide rail 25. Since the straight grooves and inclined grooves in the first guide rail 24 and the second guide rail 25 are parallelly arranged and have the same length, when the tool seat one 31, the tool seat two 41, and the tool seat three 51 slide in the tool storage cavity 21, their own positions do not change, that is, they always keep the tool surface facing the direction of the drill head seat 2, further ensuring that the tool can smoothly perform drilling work after switching. At the same time, the switching of the tool assembly is achieved only by the rotation of one driving disk 7, making the tool switching faster and more convenient.

[0021] In this embodiment, as Figure 4 , a central cutter head 26 is fixedly installed at the center position of the drill head seat 2, and a plurality of auxiliary cutter blocks 27 are fixedly arranged in a circular pattern on the surface and outer circle of the drill head seat 2.

[0022] To sum up, during the implementation of the present invention, by providing a tool storage cavity 21 on the drill head seat 2, three different types of tool assemblies can be slidably stored in the tool storage cavity 21, that is, the first tool assembly 3 is suitable for rocks, the second tool assembly 4 is suitable for gravel, and the third tool assembly 5 is suitable for soft soil. At the same time, the hydraulic telescopic rod 23 is used to drive the driving disk 7 to rotate, and in combination with the linkage of the first guide rail 24 and the guide groove 71, the switching of the tool can be completed only by a single rotation of the driving disk 7, thereby greatly reducing the time spent on tool switching. As a result, the pipe jacking machine can adapt to a variety of complex geological environments. Moreover, the horizontal length of the inclined groove is set to be twice the length of the straight groove, so that the phase difference between the two tool assemblies during sliding switching is 50%, thereby avoiding the phenomenon of tool jamming. In addition, a second guide rail 25 parallel to the first guide rail 24 is additionally provided. Through the sliding of the limiting block 311 along the second guide rail 25 and the sliding of the guide rod 62 and the guide block 61 along the first guide rail 24, the position of the tool group assembly does not change during the sliding switching process, that is, it is ensured that the tool surface of the tool assembly can protrude from the drill head seat 2 for drilling work and cooperate with the card slot 211 for locking, making the tool stable in posture after switching, and thus improving the drilling efficiency of the pipe jacking machine.

[0023] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. Pipe jacking machine for trenchless pipeline construction under complex geological conditions, characterized in that, It includes a cylinder body (1) and a drill bit mechanism rotatably connected to the cylinder body (1). The drill bit mechanism includes a drill bit seat (2), a first cutter assembly (3), a second cutter assembly (4), a third cutter assembly (5), a driving rod (6) and a driving disc (7). Among them, the drill bit seat (2) is rotatably arranged on the cylinder body (1). Four cutter receiving cavities (21) are circumferentially formed on the drill bit seat (2). Two driving rods (6) are slidably arranged in the cutter receiving cavities (21). Two first cutter assemblies (3) and third cutter assemblies (5) are respectively fixedly arranged on the two driving rods (6) in the two cutter receiving cavities (21) located in the vertical position. Two second cutter assemblies (4) and third cutter assemblies (5) are respectively fixedly arranged on the two driving rods (6) in the two cutter receiving cavities (21) located in the horizontal direction. A spacer plate (22) is fixedly arranged in the cutter receiving cavity (21). A driving disc (7) for driving the driving rod (6) to slide is rotatably arranged in the spacer plate (22). And a hydraulic telescopic rod (23) is hinged between the driving disc (7) and the spacer plate (22).

2. The pipe jacking machine for trenchless pipeline construction under complex geological conditions according to claim 1, characterized in that The first cutter assembly (3) includes a cutter seat one (31) and hob cutters (32). Among them, the cutter seat one (31) is fixedly arranged on the driving rod (6), and two groups of hob cutters (32) are rotatably arranged on the cutter seat one (31); The second cutter assembly (4) includes a cutter seat two (41) and tooth cutters (42). Among them, the cutter seat two (41) is fixedly arranged on the driving rod (6), and two groups of tooth cutters (42) are rotatably arranged on the cutter seat two (41); The third cutter assembly (5) includes a cutter seat three (51) and scraping cutters (52). Among them, the cutter seat three (51) is fixedly arranged on the driving rod (6), and two groups of scraping cutters (52) are fixedly arranged on the cutter seat three (51).

3. The pipe jacking machine for trenchless pipeline construction under complex geological conditions according to claim 2, characterized in that, Guide blocks (61) are fixedly arranged at both ends of the driving rod (6), and a guide rod (62) is fixedly arranged in the middle of the driving rod (6); Two first guide rails (24) are formed on the upper and lower end faces of the spacer plate (22) and the cutter receiving cavity (21). The two guide blocks (61) are respectively slidably arranged along the first guide rails (24) on the upper and lower end faces of the cutter receiving cavity (21). The guide rod (62) is slidably arranged along the first guide rail (24) on the spacer plate (22).

4. The pipe jacking machine for trenchless pipeline construction under complex geological conditions according to claim 3, wherein Two guide grooves (71) are formed on the driving disc (7); The guide rod (62) penetrates through the spacer plate (22) and is slidably arranged along the guide groove (71).

5. The pipe jacking machine for trenchless pipeline construction under complex geological conditions according to claim 3, characterized in that, Two second guide rails (25) are formed on the upper and lower end faces of the cutter receiving cavity (21) and the spacer plate (22). Both the first guide rail (24) and the second guide rail (25) are composed of a straight groove and an inclined groove. And the length of the inclined groove in the horizontal direction is twice that of the straight groove. The straight groove and the inclined groove in the first guide rail (24) are parallel to and have the same length as the straight groove and the inclined groove in the second guide rail (25).

6. The pipe jacking machine for trenchless pipeline construction under complex geological conditions according to claim 5, characterized in that, A limiting block (311) and a clamping plate (312) are fixedly arranged on each of the tool holder one (31), the tool holder two (41) and the tool holder three (51), and the limiting block (311) is slidably arranged along the second guide rail (25); Two rectangular stepped card slots (211) are formed in the middle position of the output surface of the tool storage cavity (21), and the clamping plate (312) can be fixedly clamped into the card slots (211).

7. The pipe jacking machine for trenchless pipeline construction under complex geological conditions according to claim 1, characterized in that, A central tool bit (26) is fixedly arranged at the center position of the drill bit holder (2), and a plurality of auxiliary tool blocks (27) are fixedly arranged on the surface and the outer circle of the drill bit holder (2) in a circumferential manner.

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