A crusher suitable for the discharge of a pipe jacking machine

Abstract

The application discloses a crusher suitable for a slurry discharging pipe of a pipe jacking machine and belongs to the technical field of pipe jacking excavation construction. The crusher comprises a crusher shell, a slag crushing device and a slurry stirring device. The crusher shell is in a barrel structure, a flow guide crushing cavity is fixedly arranged in the crusher shell, a transmission gear fixing plate is symmetrically arranged on the side wall of the crusher shell, and a stirring system fixing cantilever is arranged on the transmission gear fixing plate. A worm fixing structure and a stirring center rod fixing hole are integrally arranged on the stirring system fixing cantilever. The crusher shell is also provided with a main shaft fixing hole, an auxiliary shaft fixing hole and a motor fixing end face which are parallel to each other. A turbine fixing plate is fixedly arranged in the motor fixing end face. The crusher drives the shaft body of the transmission structure of the crushing device to rotate through a speed reducer, and then the shaft body fixing gasket drives the rotor to rotate and cut and crush. The slurry stirring device obtains a rotating torque through a turbine worm transmission. The crushing device and the stirring device share a set of transmission devices, and the space in the cabin of the pipe jacking machine is saved.

Description

Technical Field

[0001] This invention belongs to the field of pipe jacking construction technology, specifically a crusher suitable for the slurry discharge port of a pipe jacking machine. Background Technology

[0002] With the rapid development of urban economies and the increasing density of population, the demand for infrastructure construction has risen sharply, and the development and utilization of underground space has gradually become mainstream. When faced with uncontrollable geological conditions, slurry balance pipe jacking machines are widely used in trenchless fields due to their high excavation efficiency, wide adaptability, and high construction precision. However, due to the complexity of the soil layers, construction often stalls due to blockage of the slurry drainage pipes.

[0003] When a slurry-balanced pipe jacking machine is excavating, it thoroughly mixes the slurry and excavated rock, and then transports it to the surface through a slurry discharge pipe. However, some large pieces of excavated rock that have not been fully crushed will accumulate and clog the pipe. At present, jaw crushers are often installed at the slurry discharge pipe inlet to crush the excavated rock, but their structural characteristics and hydraulic drive method make it impossible to fully crush the excavated rock, and unsolvable sediment accumulation is prone to occur in the slurry chamber.

[0004] Besides the traditional jaw crushers located above the discharge pipe, some jaw crushers also employ structurally optimized designs. Patent application CN201510422741.3 describes a method for crushing stone using a slurry circulation system. Specifically, the crushing components are installed on an internal frame. Compared to the hydraulic drive of traditional circulation system jaw crushers, this method uses an electric motor as the power source, increasing the oscillation frequency of the moving jaw plate by tens of times, significantly improving crushing efficiency. Furthermore, the moving jaw assembly and frame are arranged in a closed configuration, further increasing the probability of crushing the slag and stone.

[0005] Patent application number CN202221327035.2 describes a mud treatment device for a slurry-balanced shield tunneling machine, which includes a combination of a jaw crusher structure and a toothed roller crusher mechanism. The feed inlet of the crushing roller is directly connected to the discharge outlet of the jaw crusher, which can perform secondary crushing of slag and stone. It is equipped with an eccentric shaft and a crank rocker mechanism as the transmission device for the two crushing mechanisms. The jaw teeth in the mechanism are fixed to the machine casing by a stabilizing rod and a stabilizing block.

[0006] Although the aforementioned patents further improve the crushing efficiency of slag and prevent most of the long strip-shaped crushed stones from entering the next stage of processing equipment, a small number of large-diameter pebbles still pass through the gaps in the crushing mechanism, and the accumulation of slag and stone in the mud and water tank due to sedimentation still cannot be solved.

[0007] Based on this, the present invention designs a crusher device suitable for the slurry discharge pipe port of a pipe jacking machine to solve the above problems. Summary of the Invention

[0008] The purpose of this invention is to provide a crusher device suitable for the slurry discharge port of a pipe jacking machine, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a crusher device suitable for the slurry discharge port of a pipe jacking machine, comprising a crusher shell, a slag crushing device, and a slurry mixing device; the crusher shell is a barrel-shaped structure, with a fixed flow-guiding crushing chamber nested inside; the side wall of the crusher shell is symmetrically provided with a transmission gear fixing sheet metal and a mixing system fixing cantilever; the mixing system fixing cantilever integrates a worm gear fixing structure and a mixing center rod fixing hole; the crusher shell is also provided with a main shaft fixing hole, a secondary shaft fixing hole, and a motor fixing end face that are parallel to each other; a worm gear fixing sheet metal is fixed inside the motor fixing end face; the slag crushing device is integrally assembled at the rod fixing hole position of the crusher shell, and includes a crushing device transmission structure and a crushing device cutting structure that cooperate with each other, which can realize power transmission and cut and crush the slag discharged; the slurry mixing device is integrally fixed on the mixing system fixing cantilever, and realizes power transmission through worm gear meshing, which can uniformly mix the crushed slurry.

[0010] The above-mentioned crusher is suitable for the slurry discharge pipe of the pipe jacking machine. The crusher shell adopts a barrel structure that can be directly connected to the rear slurry discharge pipe. The reduction motor is fixed to the motor fixed end face by sheath nail to form an anti-rotation limit structure. The fixed hole of the crusher shell and the transmission shaft adopt a rolling fit structure. At the same time, the fixed cantilever of the stirring system and the fixed sheet metal of the turbine are arranged at a 90-degree angle.

[0011] The aforementioned crusher, applicable to the slurry discharge pipe of a pipe jacking machine, comprises a transmission structure including a reduction motor, a shaft connecting key, a drive shaft, a driven shaft, a driven shaft transmission gear, a drive shaft transmission gear, and a transmission shaft fixing base. The drive shaft is connected to a power source via the shaft connecting key. The drive shaft transmission gear and the driven shaft transmission gear are respectively fixed to the tail ends of the two transmission shafts and mesh with each other. The tail ends of the two transmission shafts are limited and fixed by the transmission shaft fixing base.

[0012] The above-mentioned crusher is suitable for the slurry discharge pipe of a pipe jacking machine. The crusher shell has symmetrically arranged fixing holes on the left and right sides. The spacing of the fixing holes matches the meshing size of the transmission gear. The diameter of both ends of the transmission shaft is smaller than the diameter of the shaft body. The left and right lateral movement of the transmission shaft is restricted by the transmission shaft fixing base. The active transmission shaft and the passive transmission shaft achieve synchronous transmission at the same speed.

[0013] The above-mentioned crusher is suitable for the slurry discharge pipe of a pipe jacking machine. The cutting structure of the crushing device includes a shaft connecting groove, a cutting rotor connecting key, a cutting rotor fixing ring, a cutting rotor, and a rotor connecting gasket. The whole is nested and assembled on the active drive shaft and the passive drive shaft. The rotor connecting gasket, the cutting rotor connecting key, and the cutting rotor are assembled in multiple layers to achieve precise fixation of the cutting rotor and the drive shaft.

[0014] The aforementioned crusher suitable for the slurry discharge pipe of a pipe jacking machine has shaft connection grooves on both the active and passive drive shafts. The rotor connection gasket is fitted and fixed inside the shaft connection groove and locked by sheath pins. The protruding part of the drive shaft groove is embedded in the groove inside the cutting rotor. The two sides of the cutting rotor are limited by the cutting rotor fixing ring, and the cutting rotor fixing ring is fixed to the drive shaft body by rivets.

[0015] The aforementioned crusher, applicable to the slurry discharge port of a pipe jacking machine, includes a slurry mixing device comprising mixing blades, blade fixing rings, blade drive shafts, driven turbines, driven worm gears, driving worm gears, drive turbines, blade connecting gaskets, and blade connecting grooves; the drive turbine and driven turbine are respectively meshed with the driving worm gear and driven worm gear for transmission, and the entire turbine and worm gear structure is limited and installed by a worm gear fixing structure.

[0016] The aforementioned crusher, applicable to the slurry discharge pipe of a pipe jacking machine, has a drive turbine fixedly mounted on the tail of the passive transmission shaft. The auxiliary shaft fixing hole and the worm gear fixing structure work together to limit the movement, ensuring precise meshing of the turbine and worm gear.

[0017] One end of the blade drive shaft is fixed to the fixed cantilever of the stirring system through the fixing hole of the stirring center rod, and is driven to rotate by the power transmitted by the driven turbine and the driving worm gear.

[0018] The aforementioned crusher, applicable to the slurry discharge pipe of a pipe jacking machine, has a lower half of the blade connecting gasket embedded in the groove of the blade drive shaft, and an upper half nested with the blade connecting groove. The two ends of the stirring blade are clamped and locked by the blade fixing ring, thereby achieving rigid fixation between the stirring blade and the blade drive shaft.

[0019] The aforementioned crusher suitable for the slurry discharge pipe of a pipe jacking machine has all its edges and corners chamfered, including the fixed sheet metal of the transmission gear, the fixed end face of the motor, the fixed structure of the worm gear, and the fixed cantilever of the mixing system.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention sets the slag crushing device inside the crusher shell and guides the slag to the top of the crushing device through the internal cavity; the crushing device transmission structure shaft is driven to rotate by the reduction motor, and the rotor is driven to rotate and cut by the shaft fixing shims; the mud mixing device obtains rotation torque through worm gear transmission; the crushing device and the mixing device share a set of transmission devices, saving space in the pipe jacking machine cabin.

[0022] 2. This invention uses a dual-shaft crushing device to replace the traditional hydraulic jaw crusher, which can achieve complete crushing of large pieces of slag. In addition, the setting of the stirring mechanism solves the problem of slag settling and accumulating in the mud tank due to insufficient suction of the slurry pump. It has the advantages of ingenious design, compact structure, high crushing efficiency and strong pressure resistance. Attached Figure Description

[0023] To more clearly explain the specific technical solutions of the present invention, a brief introduction is provided here using accompanying drawings, which constitute a part of this application. The following description will be combined with some implementation examples for explanation and illustration. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a crusher suitable for the slurry discharge pipe of a pipe jacking machine according to the present invention;

[0025] Figure 2 This is a schematic diagram of the outer shell structure of a crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to the present invention;

[0026] Figure 3 This is a schematic diagram of the transmission structure of a crushing device for a crusher suitable for the slurry discharge pipe opening of a pipe jacking machine according to the present invention;

[0027] Figure 4 This is a schematic diagram of the cutting structure of a crushing device for a crusher suitable for the slurry discharge pipe opening of a pipe jacking machine according to the present invention;

[0028] Figure 5 This is a schematic diagram of a slurry mixing structure for a crusher suitable for the slurry discharge pipe of a pipe jacking machine according to the present invention.

[0029] Figure label:

[0030] 1-Outer shell, 11-Transmission gear fixing sheet metal, 12-Flow guiding crushing chamber, 13-Standing hole for stirring center rod, 14-Worm gear fixing structure, 15-Turbine fixing sheet metal, 16-Motor fixing end face, 17-Main shaft fixing hole, 18-Secondary shaft fixing hole, 19-Standing cantilever for stirring system;

[0031] 2-Slag and stone crushing device;

[0032] 21-Crushing device transmission structure, 211-Reduction motor, 212-Shaft connection key, 213-Driven transmission shaft, 214-Passive transmission shaft, 215-Passive shaft transmission gear, 216-Driven shaft transmission gear, 217-Transmission shaft fixing base;

[0033] 22-Crushing device cutting structure, 221-Shaft connection groove, 222-Crushing rotor connection key, 223-Crushing rotor fixing ring, 224-Crushing rotor, 225-Rotor connection gasket;

[0034] 3-Mud mixing structure, 31-Mixing blade, 32-Blade retaining ring, 33-Blade drive shaft, 34-Driven turbine, 35-Driven worm, 36-Driven worm, 37-Drive turbine, 38-Blade connecting gasket, 39-Blade connecting groove. Detailed Implementation

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

[0036] Please see Figures 1-5 As shown, the present invention provides a technical solution: a slurry discharge crusher suitable for pipe jacking machines, comprising a crusher shell 1, a slag crushing device 2, and a slurry mixing device 3; the crusher shell 1 is a barrel-shaped structure, with a fixed flow guiding crushing chamber 12 nested inside; the side wall of the crusher shell 1 is symmetrically provided with a transmission gear fixing sheet metal 11 and a mixing system fixing cantilever 19; the mixing system fixing cantilever 19 integrates a worm gear fixing structure 14 and a mixing center rod fixing hole 13; the crusher shell 1 is also provided with mutually parallel main shaft fixing... The device includes a hole 17, a secondary shaft fixing hole 18, and a motor fixing end face 16. A turbine fixing sheet metal 15 is fixed inside the motor fixing end face 16. The slag crushing device 2 is integrally assembled at the rod fixing hole position of the crusher housing 1. It includes a crushing device transmission structure 21 and a crushing device cutting structure 22 that cooperate with each other, which can realize power transmission and cut and crush the discharged slag. The mud mixing device 3 is integrally fixed on the mixing system fixing cantilever 19. Power transmission is realized through worm gear meshing, which can uniformly mix the crushed mud.

[0037] Specifically, the equipment comprises a crusher shell 1, a slag crushing device 2, and a slurry mixing structure 3. The slag crushing device 2 is located inside the crusher shell 1, and the slurry mixing structure 3 is located on the cantilever of the crusher shell 1. The entire equipment is used for crushing slag and mixing sediment in the slurry discharge pipeline of the pipe jacking machine, as detailed below:

[0038] like Figure 1 , 2 As shown, the crusher housing 1 comprises: a transmission gear fixing sheet metal 11, a flow-guiding crushing chamber 12, a stirring center rod fixing hole 13, a worm gear fixing structure 14, a turbine fixing sheet metal 15, a motor fixing end face 16, a main shaft fixing hole 17, a secondary shaft fixing hole 18, and a stirring system fixing cantilever 19. The crusher housing 1 is generally barrel-shaped. The transmission gear fixing sheet metal 11 and the turbine fixing sheet metal 15 are symmetrically arranged. The motor fixing end face 16 is provided above the turbine fixing sheet metal 15, and the active drive shaft 213 passes through two radii and one end face. The passive drive shaft 21... Four components pass through two sheet metal panels. The flow-guiding crushing chamber 12 is arranged in a funnel shape inside the barrel shell. The stirring system fixed cantilever 19 is a rectangular cuboid shape. One end is fixed to the motor fixed end face 16, and the other end is provided with a stirring center rod fixing hole 13. The middle part is provided with a worm gear fixing structure 14, which is a cube with a circular hole cut in the middle. There is also a circular hole on the side of the motor fixed end face 16. The three holes are arranged in a straight line and parallel to the bottom of the stirring system fixed cantilever 19. The overall edge structure of the crusher shell 1 is rounded to reduce the wear of the slag and stone in the chamber on the equipment.

[0039] It should be noted that the crusher housing 1 adopts a barrel structure that can be directly connected to the rear slurry discharge pipe. The reduction motor 211 is fixed to the motor fixing end face 16 by sheath nails to form an anti-rotation limiting structure. The fixing hole of the crusher housing 1 and the transmission shaft adopt a rolling fit structure. At the same time, the fixed cantilever 19 of the stirring system and the turbine fixing sheet metal 15 are arranged at a ninety-degree angle perpendicularly.

[0040] In this invention, the transmission structure 21 of the crushing device includes a reduction motor 211, a shaft connecting key 212, a drive shaft 213, a driven shaft 214, a driven shaft transmission gear 215, a drive shaft transmission gear 216, and a transmission shaft fixing base 217. The drive shaft 213 is connected to the power source via the shaft connecting key 212. The drive shaft transmission gear 216 and the driven shaft transmission gear 215 are respectively fixed to the tail ends of the two transmission shafts and mesh with each other. The tail ends of the two transmission shafts are limited and fixed by the transmission shaft fixing base 217. The fixing holes on the left and right sides of the crusher housing 1 are symmetrically arranged, and the spacing of the fixing holes matches the meshing size of the transmission gears. The diameters at both ends of the transmission shaft are smaller than the diameter of the main body of the shaft. The lateral movement of the transmission shaft is restricted by the transmission shaft fixing base 217, and the drive shaft 213 and the driven shaft 214 achieve synchronous transmission at the same speed.

[0041] like Figure 2 , 3As shown, the slag crushing device includes: a crushing device transmission structure 21 and a crushing device cutting structure 22. The internal part of the reduction motor 211 is directly connected to the active transmission shaft 213 and fixed by the shaft connection key 212. The plane of the first end of the active transmission shaft 213 coincides with the inner plane of the turbine fixing sheet metal 15; the plane of the tail end of the active transmission shaft coincides with the inner plane of the transmission gear fixing sheet metal 11. The two transmission shaft fixing bases 217 are arranged side by side, which restricts the sliding displacement of the two transmission shafts and is fixed to the outer plane of the transmission gear fixing sheet metal 11 by four sheath pins. The transmission system and the crushing system are combined in a compact manner, which improves the overall compactness of the crushing device.

[0042] Specifically, the cutting structure 22 of the crushing device includes a shaft connecting groove 221, a cutting rotor connecting key 222, a cutting rotor fixing ring 223, a cutting rotor 224, and a rotor connecting gasket 225. These components are nested and assembled on the active drive shaft 213 and the passive drive shaft 214. The rotor connecting gasket 225, the cutting rotor connecting key 222, and the cutting rotor 224 are assembled in multiple layers to achieve precise fixation between the cutting rotor 224 and the drive shaft. Both the active drive shaft 213 and the passive drive shaft 214 have shaft connecting grooves 221. The rotor connecting gasket 225 is fitted and fixed inside the shaft connecting groove 221 and locked with sheath pins. The protruding part of the drive shaft groove is embedded in the groove inside the cutting rotor 224. The cutting rotor 224 is limited on both sides by the cutting rotor fixing ring 223, which is fixed to the drive shaft body with rivets.

[0043] like Figure 3 , 4 As shown, the cutting structure 22 of the crushing device includes a shaft connecting groove 221, a cutting rotor connecting key 222, a cutting rotor fixing ring 223, a cutting rotor 224, and a rotor connecting gasket 225 forming an integral structure. Both the active drive shaft 213 and the passive drive shaft 214 have shaft connecting grooves 221 in their middle sections, the length of which is equal to the thickness of the cutting rotor 224. The rotor connecting gasket 225 can be placed precisely in the gap between the shaft connecting groove 221 and the cutting rotor connecting key 222. The torque transmitted by the drive shaft can be transmitted to the cutting rotor 224 through the rotor connecting gasket 225, driving it to rotate and cut. The cutting rotors on the active drive shaft 213 and the passive drive shaft 214 are arranged in a staggered manner, which can significantly reduce the slag escape rate.

[0044] In this embodiment, the mud mixing device 3 includes mixing blades 31, blade fixing rings 32, blade drive shafts 33, driven turbines 34, driven worm gears 35, driving worm gears 36, drive turbines 37, blade connecting gaskets 38, and blade connecting grooves 39. The drive turbines 37 and driven turbines 34 mesh with the driving worm gears 36 and driven worm gears 35 respectively, and the entire turbine and worm gear structure is limited and installed by the worm gear fixing structure 14. The drive turbine 37 is fixedly assembled to the tail of the passive transmission shaft 214, and the secondary shaft fixing hole 18 and the worm gear fixing structure 14 cooperate to limit the movement, ensuring precise meshing of the turbine and worm gear. One end of the blade drive shaft 33 is fixed to the mixing system fixed cantilever 19 through the mixing center rod fixing hole 13, and is driven to rotate by the power transmitted by the driven turbine 34 and the driving worm gear 36. The lower half of the blade connecting gasket 38 is embedded in the slot of the blade drive shaft 33, and the upper half is nested with the blade connecting groove 39. The two ends of the stirring blade 31 are clamped and locked by the blade fixing ring 32, so as to achieve rigid fixation between the stirring blade 31 and the blade drive shaft 33. All the edges and corners of the transmission gear fixing sheet metal 11, the motor fixing end face 16, the worm gear fixing structure 14, and the stirring system fixing cantilever 19 are chamfered.

[0045] like Figure 5 As shown, the mud mixing structure includes: mixing blades 31, blade fixing rings 32, blade drive shafts 33, driven turbines 34, driven worm gears 35, driving worm gears 36, drive turbines 37, blade connecting gaskets 38, and blade connecting grooves 39 forming an integral structure; the drive turbine is fixed to the head of the passive transmission shaft 214 by an internal key, rotates with it, and provides power to the entire mixing device; the driven worm gears 35 then mesh with the driven turbines 34 fixed on the blade drive shaft 33, ultimately driving the mixing blades 31 to rotate; one end of the blade drive shaft 33 has a smaller diameter than the middle part, and it forms a rotating pair with the mixing center rod fixing hole 13; the middle part of the drive shaft has a blade connecting groove 39, and the blade connecting gaskets 38 are fixed in the groove by sheath pins; the part of the gasket that protrudes from the groove can completely fit the groove inside the mixing blades 31, and the rotational torque of the blade drive shaft 33 can be transmitted to the blades through the space between the gaskets; the mixing blades 31 are arranged in a five-part pattern, and each mixing plate has an obtuse angle structure, which can improve the mixing efficiency of the blades during construction.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine, characterized in that, It includes a crusher shell (1), a slag crushing device (2), and a mud mixing device (3); The crusher shell (1) is a barrel structure, with a fixed flow-guiding crushing chamber (12) nested inside. The side wall of the crusher shell (1) is symmetrically provided with a transmission gear fixing sheet metal (11) and a stirring system fixing cantilever (19). The stirring system fixing cantilever (19) is integrated with a worm gear fixing structure (14) and a stirring center rod fixing hole (13). The crusher housing (1) is also provided with parallel main shaft fixing holes (17), secondary shaft fixing holes (18) and motor fixing end face (16), and a turbine fixing sheet metal (15) is fixed inside the motor fixing end face (16). The slag crushing device (2) is assembled in the rod fixing hole position of the crusher shell (1). It includes a crushing device transmission structure (21) and a crushing device cutting structure (22) that cooperate with each other, which can realize power transmission and cut and crush the slag discharged from the crusher. The mud mixing device (3) is fixed on the fixed cantilever (19) of the mixing system. Power transmission is achieved through worm gear meshing, which can uniformly mix the crushed mud.

2. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 1, characterized in that, The crusher shell (1) adopts a barrel structure that can be directly connected to the rear slurry discharge pipe. The reduction motor (211) is fixed to the motor fixing end face (16) by sheath nails to form an anti-rotation limiting structure. The fixing hole of the crusher shell (1) and the transmission shaft adopt a rolling fit structure. At the same time, the fixed cantilever (19) of the stirring system and the fixed sheet metal (15) of the turbine are arranged at a 90-degree angle.

3. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 2, characterized in that, The transmission structure (21) of the crushing device includes a reduction motor (211), a shaft connecting key (212), an active transmission shaft (213), a passive transmission shaft (214), a passive shaft transmission gear (215), an active shaft transmission gear (216), and a transmission shaft fixing base (217). The active transmission shaft (213) is connected to the power source through the shaft connecting key (212). The active shaft transmission gear (216) and the passive shaft transmission gear (215) are respectively fixed to the tails of the two transmission shafts and mesh with each other. The tails of the two transmission shafts are limited and fixed by the transmission shaft fixing base (217).

4. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 3, characterized in that, The crusher housing (1) has symmetrically arranged fixing holes on the left and right sides. The spacing between the fixing holes matches the meshing size of the transmission gear. The diameters at both ends of the transmission shaft are smaller than the diameter of the shaft body. The transmission shaft is restricted to move left and right by the transmission shaft fixing base (217). The active transmission shaft (213) and the passive transmission shaft (214) achieve synchronous transmission at the same speed.

5. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 4, characterized in that, The cutting structure (22) of the crushing device includes a shaft connecting groove (221), a cutting rotor connecting key (222), a cutting rotor fixing ring (223), a cutting rotor (224), and a rotor connecting gasket (225), which are nested and assembled on the active drive shaft (213) and the passive drive shaft (214). The rotor connecting gasket (225), the cutting rotor connecting key (222), and the cutting rotor (224) are assembled in multiple layers to achieve precise fixation of the cutting rotor (224) and the drive shaft.

6. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 5, characterized in that, Both the active drive shaft (213) and the passive drive shaft (214) are provided with shaft connection grooves (221). The rotor connection gasket (225) is fitted and fixed inside the shaft connection groove (221) and locked by sheath pins. The protruding part of the drive shaft groove is embedded in the groove inside the cutting rotor (224). The two sides of the cutting rotor (224) are limited by the cutting rotor fixing ring (223), and the cutting rotor fixing ring (223) is fixed to the drive shaft body by rivets.

7. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 6, characterized in that, The mud mixing device (3) includes mixing blades (31), blade fixing rings (32), blade drive shafts (33), driven turbines (34), driven worms (35), driving worms (36), drive turbines (37), blade connecting gaskets (38), and blade connecting grooves (39). The drive turbines (37) and driven turbines (34) mesh with the driving worms (36) and driven worms (35) respectively, and the entire turbine and worm structure is limited and installed by the worm fixing structure (14).

8. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 7, characterized in that, The drive turbine (37) is fixedly mounted on the tail of the passive transmission shaft (214), and the secondary shaft fixing hole (18) and the worm fixing structure (14) work together to limit the movement and ensure precise meshing of the turbine and worm. One end of the blade drive shaft (33) is fixed to the fixed cantilever (19) of the stirring system through the fixing hole (13) of the stirring center rod, and is driven to rotate by the power transmitted by the driven turbine (34) and the driving worm (36).

9. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 8, characterized in that, The lower half of the blade connecting pad (38) is embedded in the slot of the blade drive shaft (33), and the upper half is nested with the blade connecting groove (39). The two ends of the stirring blade (31) are clamped and locked by the blade fixing ring (32) to achieve rigid fixation between the stirring blade (31) and the blade drive shaft (33).

10. A crusher suitable for the slurry discharge pipe inlet of a pipe jacking machine according to claim 1, characterized in that, All corners of the transmission gear fixing sheet metal (11), motor fixing end face (16), worm gear fixing structure (14), and stirring system fixing cantilever (19) are chamfered.

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