Crushing drill bit for slurry balance push bench

Abstract

The utility model relates to a crushing drill bit for a slurry balance push bench, which comprises a machine body, a machine base, a knife rest, a crushing serrated knife and a drill bit assembly, the end face of the machine body is provided with an annular groove, the inner side wall of the annular groove is provided with an inner ring groove, the machine base is provided with an insertion groove and a side groove, the side groove is internally provided with an installation assembly, and the installation assembly is provided with an inner ring groove. The mounting assembly comprises an inserting plate, an elastic rod is connected to the inserting plate, the elastic rod comprises a cylinder, an inner cavity of the cylinder is connected with one end of a spring A, the other end of the spring A is connected with one end of a cylinder, and the other end of the cylinder is fixed to the inserting plate; the crushing serrated knife and the drill bit assembly are both installed on the knife rest, the knife rest is connected to the inserting groove, the machine base is arranged in the annular groove, and the inserting plate is arranged in the side groove and corresponds to the inner annular groove. By utilizing the hidden mounting assembly on the side of the headstock, the stability when the headstock is assembled on the end head of the machine body can be improved, and the phenomena of displacement and separation of the headstock are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking machines, in particular to a crushing drill bit for a mud-water balanced pipe jacking machine. Background Art

[0002] The slurry balance pipe jacking machine is the most important equipment used in the slurry balance pipe jacking construction process. The tool pipe on it is gradually advanced, the cutter head is constantly rotating, the mud inlet pipe continuously supplies mud and water, and the mud discharge pipe continuously discharges the mud and water mixed with abandoned soil from the mud and water tank. The mud and water tank must maintain a certain pressure so that the cutter head can drill forward under the mud and water pressure. At the same time, the cutter head needs to be equipped with a crushing drill bit to crush the stones needed in the process of underground pipeline excavation to ensure the excavation progress.

[0003] The Chinese invention patent document with the publication number CN219691535U in the prior art discloses a mud-water balance pipe jacking machine, which belongs to the field of pipe jacking machines. The invention comprises: a partition plate divides the main housing into a mud-water chamber and an installation chamber, a cutter head frame is rotatably mounted on the main housing, a plurality of drills are arranged on the cutter head frame, an annular frustum filter is fixedly mounted between the partition plate and the inner wall of the main housing, a cylindrical crushing roller is rotatably mounted in the mud-water chamber, the crushing roller is located on the inner side of the annular frustum filter, the outer wall of the crushing roller matches the inner wall of the annular frustum filter, a mud discharge pipe is used for mud discharge, and a water inlet pipe is used for water inlet.

[0004] The above patent sets a cylindrical crushing roller and an annular frustum filter screen, so that the crushing area between the crushing roller and the annular frustum filter screen is large outside and small inside. When crushing larger stones, the stones will be gradually crushed from large to small, and the crushing effect is better. However, the drill support plate on it is connected to the cutter head frame by screws, and each of the drill support plates is provided with at least two drills, wherein the drill is an independent structure, and it adopts a cross-arranged structure to be assembled on the shaft end, but when the drill directly contacts the large stone, it will cause the problem of the drill edge rolling; and the drill installation module is arranged on the side of the cutter head frame away from the partition, and is arranged in a circular array with the center of the cutter head frame as the center point, and the drill installation module includes a groove and a drill support plate, and the drill installation module is clamped with the drill, so that the drill will receive a certain resistance when contacting the stone, and then this part of the resistance will cause the drill to produce a great impact force on the drill installation module, causing the drill installation module to be damaged. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a crushing drill bit for a slurry balanced pipe jacking machine. By utilizing a hidden mounting assembly beside a head seat, the stability of the head seat when assembled on the end of a machine body can be improved to avoid displacement and detachment thereof. By utilizing a crushing knife and an auxiliary knife, stones can be crushed for a second time to improve the crushing efficiency. At the same time, an anti-collision spring can play an effective contact buffering effect to avoid direct impact causing the knife edge to roll over and the drill seat to be damaged, thereby solving the problems of existing slurry balanced pipe jacking machines.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A crushing drill bit for a mud-water balanced pipe jacking machine, comprising a machine body, a machine base, a tool holder, a crushing tooth cutter and a drill bit assembly, wherein the end surface of the machine body is provided with an annular groove, the inner side wall of the annular groove is provided with an inner annular groove, the machine base is provided with a slot and a side groove, a mounting assembly is provided in the side groove, the mounting assembly comprises an insert plate, an elastic rod is connected to the insert plate, the elastic rod comprises a cylinder, the inner cavity of the cylinder is connected to one end of a spring A, the other end of the spring A is connected to one end of a cylinder, and the other end of the cylinder is fixed to the insert plate;

[0008] The crushing cutter and the drill assembly are both mounted on a tool holder, the tool holder is connected to a slot, the machine base is arranged in an annular groove, the insert plate is arranged in a side groove, and the insert plate corresponds to the inner annular groove.

[0009] The drill assembly includes a drill seat, a slide groove is provided on the drill seat, one end of a spring B is connected to the slide groove, the other end of the spring B is connected to a drill disk, a spiral drill bit is connected to the drill disk, and a crushing knife is connected to the spiral drill bit.

[0010] The machine body, machine base, tool holder and drill bit seat are all circular ring structures; there are four slots, which are evenly distributed on the end face of the machine base; there are four side grooves, which are evenly distributed on the outer side face of the machine base; four legs are evenly distributed around the tool holder, one end of the leg is connected to the tool holder, and the other end is connected to the slot; the crushing tooth cutter is arranged on the leg, and the drill bit assembly is arranged at the center position of the tool holder.

[0011] The drill disc is connected with a clamping ring, the clamping ring is clamped in the slide groove, and the spring B is arranged between the clamping ring and the slide groove.

[0012] The inserting plate is an arc-shaped structure; there are three elastic rods which are evenly distributed on the inserting plate.

[0013] The beneficial effects of the utility model are:

[0014] 1. A machine base is provided with side grooves around the machine base, and a mounting assembly is provided in the side grooves. When in use, when the machine base is inserted into the annular groove on the end of the machine body, the elastic rod in the mounting assembly in the side groove will push the plug plate on its shaft end, and the plug plate enters the inner ring groove on the inner wall of the annular groove. When it is inserted, the plug plate is pressed by the inner wall of the annular groove, and then presses the elastic rod to shrink, so that the entire mounting assembly is stored in the side groove until it moves to the position of the inner ring groove and extends out, thereby improving the connection tightness between the machine base and the machine body, and avoiding the phenomenon of separation or displacement when impacting stones.

[0015] 2. By setting a tool holder, a crushing tooth cutter and a drill bit assembly, four crushing tooth cutters are provided and are arranged on the outer walls of the four legs of the tool holder, and the shaft end of the spiral drill bit in the drill bit assembly is blunt-ended, and a crushing knife is also provided on the blunt end, wherein there are two groups of crushing knives, and the two groups of crushing knives are arranged in a circular array, the above-mentioned crushing knives are in an arc-shaped structure, the crushing tooth cutters are in a rectangular tower-shaped structure, and the cutting edge ends of the crushing knives and the crushing tooth cutters 4 are provided with serrated grooves. When in use, when the drill bit assembly contacts a stone, the anti-collision spring B on the rear side will have a certain buffering effect to avoid the blade rolling phenomenon caused by direct impact, and at the same time, it can also prevent the tool holder and the head seat on the rear side from being subjected to huge force impact, and the crushing knife and the spiral drill bit can better drill and crush the stone, and the crushing tooth cutter is used for secondary crushing of the crushed stone so that it can be better processed by the machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of a crushing drill bit;

[0018] Figure 3 This is the disassembled structure diagram of the crushing drill bit;

[0019] Figure 4 This is the disassembled structure diagram of the machine base;

[0020] Figure 5 This is a disassembled structural diagram of the tool holder, crushing cutter and drill bit assembly;

[0021] Figure 6 The rear view of the drill head disc;

[0022] As shown in the figure: 1-body; 2-machine base; 3-tool holder; 4-crushing tooth cutter; 5-drill bit assembly; 101-annular groove; 102-inner ring groove; 103-; 104-; 201-installation assembly; 202-slot; 203-side groove; 301-leg; 201a-insert plate; 201b-elastic rod; 201b-1-cylinder; 201b-2-spring A; 201b-3-column; 501-drill bit seat; 501a-slide; 502-spring B; 503-drill bit disk; 503a-clamping ring; 504-spiral drill bit; 505-crushing knife; 506-block; 507-slot. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Implementation 1

[0025] like Figures 1 to 6 As shown, a crushing drill bit for a mud-water balanced pipe jacking machine comprises a machine body 1, a machine base 2, a tool holder 3, a crushing tooth cutter 4 and a drill bit assembly 5, the end face of the machine body 1 is provided with an annular groove 101, the inner side wall of the annular groove 101 is provided with an inner annular groove 102, the machine base 2 is provided with a slot 202 and a side groove 203, a mounting assembly 201 is provided in the side groove 203, the mounting assembly 201 comprises an insert plate 201a, an elastic rod 201b is connected to the insert plate 201a, the elastic rod 201b comprises a cylinder 201b-1, the inner cavity of the cylinder 201b-1 is connected to one end of a spring A201b-2, the other end of the spring A201b-2 is connected to one end of a cylinder 201b-3, the other end of the cylinder 201b-3 is fixed to the insert plate 201a;

[0026] The crushing cutter 4 and the drill assembly 5 are both mounted on the tool holder 3 , the tool holder 3 is connected to the slot 202 , the machine base 2 is arranged in the annular groove 101 , the insert plate 201 a is arranged in the side groove 203 , and the insert plate 201 a corresponds to the inner annular groove 102 .

[0027] The drill bit assembly 5 includes a drill bit seat 501, and a slide groove 501a is arranged on the drill bit seat 501. One end of a spring B502 is connected to the slide groove 501a, and the other end of the spring B502 is connected to a drill disc 503. A spiral drill bit 504 is connected to the drill disc 503, and a crushing knife 505 is connected to the spiral drill bit 504.

[0028] The machine body 1, machine base 2, tool holder 3 and drill bit holder 501 are all annular structures; there are four slots 202, which are evenly distributed on the end face of the machine base 2; there are four side grooves 203, which are evenly distributed on the outer side of the machine base 2; four legs 301 are evenly distributed around the tool holder 3, one end of the leg 301 is connected to the tool holder 3, and the other end is connected to the slot 202; the crushing tooth cutter 4 is arranged on the leg 301, and the drill bit assembly 5 is arranged at the center position of the tool holder 3.

[0029] The drill disc 503 is connected with a clamping ring 503a, and the clamping ring 503a is clamped in the slide groove 501a. The spring B502 is arranged between the clamping ring 503a and the slide groove 501a.

[0030] The inserting plate 201a is an arc-shaped structure; there are three elastic rods 201b, which are evenly distributed on the inserting plate 201a.

[0031] A clamping block 506 is disposed on the clamping ring 503 a , a clamping slot 507 is disposed in the sliding slot 501 a , and the clamping block 506 is movably disposed in the clamping slot 507 .

[0032] The body 1 is provided with a through hole, which corresponds to the plug board 201a.

[0033] A crushing drill bit for a mud-water balanced pipe jacking machine comprises a machine body 1 and a machine base 2 mounted on the shaft end thereof, wherein a mounting assembly 201 is concealedly accommodated in a side groove 203 on the outer wall of the machine base 2, and then when the machine base 2 is inserted into the shaft end of the machine body 1, the mounting assembly 201 is accommodated in the side groove 203 until the mounting assembly 201 moves to the position of an inner ring groove 102, and then it extends out and is stuck into the inner ring groove 102, thereby improving the stability and tightness of the contact installation between the two.

[0034] An inner annular groove 102 is provided on the inner side wall of the annular groove 101 of the machine head 1, a side groove 203 is provided on the outer wall of the machine base 2, and a slot 202 for installing the support leg 301 is welded on the outer side wall of the machine base 2. At the same time, the mounting assembly 201 is arranged in the side groove 203, wherein the mounting assembly 201 consists of an insert plate 201a and an elastic rod 201b, and the insert plate 201a is installed on the axial end of the elastic rod 201b.

[0035] The elastic rod 201b is composed of a cylinder 201b-1, a spring A201b-2 and a column 201b-3, and the cylinder 201b-1 and the column 201b-3 are connected by the spring 201b-2, and the spring A201b-2 is arranged inside the cylinder 201b-1.

[0036] When in use, when the machine base 2 is inserted into the annular groove 101, the elastic rod 201b will push the plug plate 201a on its axial end into the inner annular groove 102. During the insertion process, the plug plate 201a is subjected to the pressure of the inner wall of the annular groove 101, thereby pressing the elastic rod 201b to shrink, so that the entire installation assembly 201 is received into the side groove 203 until it moves to the position of the inner annular groove 102 and extends out, and the inner end face of the plug plate 201a is engaged in the side groove (203), and the outer end face is engaged in the inner annular groove 102.

[0037] Implementation 2

[0038] A tool holder 3, a crushing tooth cutter 4 and a drill bit assembly 5 are also provided. The drill bit seat 501 is connected to the drill bit disc 503 through a spring B502, so that when the spiral drill bit 504 on the drill bit disc 503 contacts a stone, it can effectively buffer and prevent severe impact.

[0039] A crushing tooth cutter 4 is detachably fixedly mounted on the outer wall of the tool holder 3, and a drill assembly 5 is installed at the center of the tool holder 3. The drill assembly 5 includes a drill seat 501 and a spring B502 embedded in the inner slide groove 501a thereof. At the same time, the drill seat 501 is connected to the drill disk 503 through the spring B502, and the spiral drill bit 504 is installed on the drill disk 503, and the clamping ring 503a on the rear side wall of the drill disk 503 cooperates with the slide groove 501a.

[0040] Support legs 301 are provided on the four side outer walls of the tool holder 3, and there are two groups of crushing knives 505, which are arranged in a circular array. The above-mentioned crushing knives 505 are in an arc-shaped structure, and the crushing tooth knife 4 is in a rectangular tower-shaped structure, and the cutting edge ends of the crushing knives 505 and the crushing tooth knife 4 are provided with serrated grooves.

[0041] When the machine body 1 drives the drill bit assembly 5 on its shaft end to contact the stone, the outermost crushing knife 505 contacts the stone first, and its short serrated end will form a certain cutting phenomenon on the stone, and then the spiral drill bit 504 will further contact the stone to crush it again, and then the small stone formed after the crushing will contact the crushing tooth knife 4 again, and be further crushed, so that it is absorbed and discharged by the machine body 1.

[0042] Through the cooperation between the clamping block 506 and the clamping slot 507 , the drill seat 501 can drive the drill disc 503 to rotate more effortlessly.

[0043] The through hole can facilitate the base 2 to be separated from the body 1 for easy maintenance.

[0044] By setting the machine base 2, the machine base 2 is provided with side grooves 203 around it, and the side grooves 203 are provided with the mounting assembly 201. When in use, when the machine base 2 is inserted into the annular groove 101 on the end of the body 1, the elastic rod 201b in the mounting assembly 201 in the side groove 203 will push the plug plate 201a on its shaft end, and the plug plate 201a enters the inner ring groove 102 on the inner wall of the annular groove 101. When it is inserted, the plug plate is pressed by the inner wall of the annular groove 101, and then presses the elastic rod 201b to shrink, so that the entire mounting assembly 201 is received in the side groove 203 until it moves to the position of the inner ring groove 102 and extends out, thereby improving the connection tightness between the machine base 2 and the body 1 to avoid it from being separated or shifted when impacting stones.

[0045] By setting the tool holder 3, the crushing tooth cutter 4 and the drill bit assembly 5, four crushing tooth cutters 4 are provided and are respectively arranged on the outer walls of the four legs 301 of the tool holder 3, and the shaft end of the spiral drill bit 504 in the drill bit assembly 5 is blunt-ended, and a crushing knife 505 is also arranged on the blunt-ended, wherein the crushing knife 505 is provided with two groups, and the two groups of crushing knives 505 are arranged in a ring array, the above-mentioned crushing knives 505 are in an arc-shaped structure, the crushing tooth cutter 4 is in a rectangular tower-shaped structure, and the crushing knife and the crushing tooth cutter 4 are provided with sawtooth grooves at the cutting edge ends. When in use, when the drill bit assembly 5 contacts a stone, the anti-collision spring B502 at the rear side will play a certain buffering effect to avoid the rolling of the cutting edge caused by direct impact, and at the same time, it can also prevent the tool holder and the machine base 2 at the rear side from being impacted by huge forces. The crushing knife 505 and the spiral drill bit 504 can better drill and crush the stone, and the crushing tooth knife is used for secondary crushing of the crushed stone, so that it can be better processed by the machine body.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A crushing drill bit for a mud-water balanced pipe jacking machine, comprising a machine body (1), a machine base (2), a tool holder (3), a crushing tooth cutter (4) and a drill bit assembly (5), characterized in that: The end surface of the machine body (1) is provided with an annular groove (101), the inner side wall of the annular groove (101) is provided with an inner annular groove (102), the machine base (2) is provided with a slot (202) and a side groove (203), a mounting assembly (201) is provided in the side groove (203), the mounting assembly (201) comprises an insert plate (201a), an elastic rod (201b) is connected to the insert plate (201a), the elastic rod (201b) comprises a cylinder (201b-1), the inner cavity of the cylinder (201b-1) is connected to one end of a spring A (201b-2), the other end of the spring A (201b-2) is connected to one end of a cylinder (201b-3), the other end of the cylinder (201b-3) is fixed to the insert plate (201a); The crushing cutter (4) and the drill bit assembly (5) are both mounted on a tool holder (3), the tool holder (3) is connected to a slot (202), the machine base (2) is arranged in an annular groove (101), the insert plate (201a) is arranged in a side groove (203), and the insert plate (201a) corresponds to the inner annular groove (102).

2. A crushing drill bit for a mud-water balanced pipe jacking machine as claimed in claim 1, characterized in that: The drill assembly (5) comprises a drill seat (501), the drill seat (501) is provided with a slide groove (501a), one end of a spring B (502) is connected to the slide groove (501a), the other end of the spring B (502) is connected to a drill disc (503), the drill disc (503) is connected to a spiral drill bit (504), and the spiral drill bit (504) is connected to a crushing knife (505).

3. A crushing drill bit for a mud-water balanced pipe jacking machine as claimed in claim 2, characterized in that: The machine body (1), the machine base (2), the tool holder (3) and the drill seat (501) are all annular structures; there are four slots (202) evenly distributed on the end surface of the machine base (2); there are four side grooves (203) evenly distributed on the outer side surface of the machine base (2); four legs (301) are evenly distributed around the tool holder (3), one end of the leg (301) is connected to the tool holder (3), and the other end is connected to the slot (202); the crushing tooth cutter (4) is arranged on the leg (301), and the drill assembly (5) is arranged at the center of the tool holder (3).

4. A crushing drill bit for a mud-water balanced pipe jacking machine as claimed in claim 2, characterized in that: The drill disc (503) is connected with a clamping ring (503a), the clamping ring (503a) is clamped in the slide groove (501a), and the spring B (502) is arranged between the clamping ring (503a) and the slide groove (501a).

5. A crushing drill bit for a mud-water balanced pipe jacking machine as claimed in claim 2, characterized in that: The inserting plate (201a) is an arc-shaped structure; there are three elastic rods (201b) which are evenly distributed on the inserting plate (201a).

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