CN222391391U - A crushing drill bit for mud-water balance pipe jacking machine - Google Patents
A crushing drill bit for mud-water balance pipe jacking machine Download PDFInfo
- Publication number
- CN222391391U CN222391391U CN202421330076.6U CN202421330076U CN222391391U CN 222391391 U CN222391391 U CN 222391391U CN 202421330076 U CN202421330076 U CN 202421330076U CN 222391391 U CN222391391 U CN 222391391U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- crushing
- annular groove
- mud
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 239000004575 stone Substances 0.000 description 20
- 238000009434 installation Methods 0.000 description 17
- 238000005553 drilling Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a crushing drill bit for a mud-water balance pipe jacking machine, which comprises a machine body, a machine base, a cutter rest, a crushing tooth cutter and a drill bit assembly, wherein an annular groove is formed in the end face of the machine body, an inner annular groove is formed in the inner side wall of the annular groove, a slot and a side groove are formed in the machine base, a mounting assembly is arranged in the side groove, the mounting assembly comprises a plugboard, an elastic rod is connected to the plugboard, the elastic rod comprises a cylinder, the 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 the cylinder, the other end of the cylinder is fixed on the plugboard, the crushing tooth cutter and the drill bit assembly are both arranged on the cutter rest, the cutter rest is connected to the slot, the machine base is arranged in the annular groove, the plugboard is arranged in the side groove, and the plugboard corresponds to the inner annular groove. By utilizing the hidden mounting component beside the headstock, the stability of the headstock when being assembled on the machine body end head can be improved, and the displacement and detachment phenomena of the headstock are avoided.
Description
Technical Field
The utility model relates to the technical field of push bench, in particular to a crushing drill bit for a mud-water balance push bench.
Background
The mud-water balance pipe jacking machine is the most main equipment applied to the construction process of mud-water balance pipe jacking, a tool pipe on the mud-water balance pipe jacking machine is gradually pushed, a cutter head continuously rotates, mud is continuously supplied by a mud inlet pipe, mud mixed with waste soil is continuously discharged out of a mud water cabin by a mud discharging pipe, the mud water cabin is kept at a certain pressure, the cutter head is enabled to drill forwards under the condition of mud water pressure, meanwhile, a crushing drill bit is required to be assembled on the cutter head, and the cutter head is used for crushing stone required in the tunneling process of an underground pipeline, so that the tunneling progress is ensured.
The Chinese patent document with the publication number of CN219691535U in the prior art discloses a mud-water balance pipe pushing jack, belonging to the field of pipe pushing jacks. The device comprises a main shell, a baffle plate, a cutter disc frame, a plurality of drilling cutters, a circular table type filter screen, a cylindrical crushing roller, a water inlet pipe and a water inlet pipe, wherein the baffle plate divides the main shell into a mud water cavity and an installation cavity, the cutter disc frame is rotatably installed on the main shell, the circular table type filter screen is fixedly installed between the baffle plate and the inner wall of the main shell, the cylindrical crushing roller is rotatably installed in the mud water cavity, the crushing roller is positioned on the inner side of the circular table type filter screen, the outer wall of the crushing roller is matched with the inner wall of the circular table type filter screen, and the mud outlet pipe is used for discharging mud.
Above-mentioned patent is through setting up columniform crushing roller and annular round platform filter screen, can make between crushing roller and the annular round platform filter screen be the crushing region of big inside and outside, when smashing the stone of great piece, can be with stone from big to little gradual broken, crushing effect is better. The drilling tool mounting modules are arranged on one side of the cutterhead frame away from the partition plate and are arranged in a circumferential array with the center of the cutterhead frame as a center point, each drilling tool mounting module comprises a groove and a drilling tool supporting plate, and the drilling tool mounting modules are clamped with the drilling tools, so that the drilling tools can receive certain resistance when contacting the stone, and the drilling tools can generate great impact force to the drilling tool mounting modules, so that the drilling tool mounting modules are damaged.
Disclosure of utility model
The utility model aims to solve the technical problem of providing a crushing drill bit for a mud-water balance pipe jacking machine, which can improve the stability of the machine head seat when being assembled on the machine body end by utilizing a hidden installation component at the side of the machine head seat, avoid the displacement and detachment phenomenon, improve the crushing efficiency by utilizing a crushing cutter and an auxiliary cutter to crush stone secondarily, and simultaneously realize an effective contact buffering effect by utilizing an anti-collision spring, avoid the phenomenon of edge rolling and drill head seat damage caused by direct impact, and solve the problems of the existing mud-water balance pipe jacking machine.
The technical scheme adopted for solving the technical problems is as follows:
The utility model provides a broken drill bit for muddy water balance push bench, includes organism, frame, knife rest, broken tooth sword and drill bit subassembly, the terminal surface of organism is provided with the annular groove, be provided with the inner annular groove on the inside wall of annular groove, be provided with slot and side groove on the frame, be provided with the installation component in the side groove, the installation component includes the picture peg, be connected with the elastic rod on the picture peg, the elastic rod includes the drum, the inner chamber of drum is connected with spring A's one end, spring A's the other end is connected with the one end of cylinder, the other end of cylinder is fixed on the picture peg;
The crushing tooth knife and the drill bit assembly are both arranged on the knife rest, the knife rest is connected to the slot, the machine base is arranged in the annular groove, the inserting plate is arranged in the side groove, and the inserting plate corresponds to the inner annular groove.
The drill bit assembly comprises a drill bit seat, a chute is formed in the drill bit seat, one end of a spring B is connected in the chute, the other end of the spring B is connected with a drill bit disc, a spiral drill bit is connected to the drill bit disc, and a crushing cutter is connected to the spiral drill bit.
The machine body, the machine base, the tool rest and the drill bit seat are all of circular structures, the number of the slots is four, the slots are uniformly distributed on the end face of the machine base, the number of the side slots is four, the side slots are uniformly distributed on the outer side face of the machine base, four supporting legs are uniformly distributed on the periphery of the tool rest, one ends of the supporting legs are connected with the tool rest, the other ends of the supporting legs are connected in the slots, the crushing tooth cutters are arranged on the supporting legs, and the drill bit assembly is arranged at the center position of the tool rest.
The drill bit disc is connected with a clamping circular ring, the clamping circular ring is clamped in the sliding groove, and the spring B is arranged between the clamping circular ring and the sliding groove.
The inserting plates are of arc structures, and the number of the elastic rods is three and the elastic rods are uniformly distributed on the inserting plates.
The beneficial effects of the utility model are as follows:
1. Through setting up the frame, the side tank has been seted up around the frame, and be provided with the installation component in the side tank again, when using, when the frame card is gone into the annular groove on the end of organism, the elastic rod in the installation component in the side tank will be promoting the picture peg on its axle head, the picture peg enters into the interior annular groove on the annular groove inner wall, and when it is carrying out male process, the picture peg receives the compressive force of annular groove inner wall, and then the compression of elastic rod, make whole installation component accomodate and enter into the side tank, stretch out when reaching the position of interior annular groove, and then improve the connection compactness between frame and the organism, avoid it to produce and break away from or shift etc. phenomenon when striking the stone.
2. Through setting up knife rest, broken tooth sword and drill bit subassembly, broken tooth sword is provided with four, and divide to establish on four landing leg outer walls of knife rest, and the axle head of auger bit is blunt mouthful setting in the drill bit subassembly, and still be provided with broken sword on blunt mouthful, wherein broken sword is provided with two sets of altogether, two sets of broken sword are annular array arrangement, foretell broken sword is arc structure, broken tooth sword is rectangular tower column structure, and the blade end of broken sword and broken tooth sword 4 has all offered the serration, when using, when the contact stone of drill bit subassembly, the crashproof spring B of its rear side will play certain cushioning effect, avoid the blade roll-over phenomenon that the direct impact produced, simultaneously also can avoid knife rest and the headstock of its rear side to receive huge power impact, and broken sword and auger bit can be better to drill and broken the stone, and broken tooth sword then is used for carrying out the secondary breakage to the stone after the breakage, make it better handled by the organism.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a cross-sectional block diagram of a breaker bit;
FIG. 3 is a disassembled view of a breaker bit;
FIG. 4 is a disassembled view of the housing;
FIG. 5 is a disassembled view of the blade carrier, crushing tooth blade and drill bit assembly;
FIG. 6 is a rear view block diagram of a drill bit plate;
The figure shows 1-machine body, 2-machine seat, 3-tool rest, 4-crushing tooth cutter, 5-drill bit component, 101-annular groove, 102-inner annular groove, 103-, 104-, 201-installation component, 202-slot, 203-side groove, 301-supporting leg, 201 a-plugboard, 201B-elastic rod, 201B-1-cylinder, 201B-2-spring A, 201B-3-cylinder, 501-drill bit seat, 501 a-chute, 502-spring B, 503-drill bit disk, 503 a-clamping ring, 504-spiral drill bit, 505-crushing cutter, 506-clamping block and 507-clamping groove.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
Example 1
As shown in fig. 1 to 6, a crushing drill bit for a mud-water balance pipe jacking machine comprises a machine body 1, a machine base 2, a tool rest 3, a crushing tooth cutter 4 and a drill bit assembly 5, wherein an annular groove 101 is formed in the end face of the machine body 1, an inner annular groove 102 is formed in the inner side wall of the annular groove 101, a slot 202 and a side slot 203 are formed in the machine base 2, a mounting assembly 201 is arranged in the side slot 203, the mounting assembly 201 comprises a plugboard 201a, an elastic rod 201b is connected to the plugboard 201a, the elastic rod 201b comprises a cylinder 201b-1, one end of a spring A201b-2 is connected to the inner cavity of the cylinder 201b-1, one end of a cylinder 201b-3 is connected to the other end of the spring A201b-2, and the other end of the cylinder 201b-3 is fixed on the plugboard 201 a;
The crushing tooth cutter 4 and the drill bit assembly 5 are both installed on the cutter frame 3, the cutter frame 3 is connected to the slot 202, the stand 2 is arranged in the annular groove 101, the inserting plate 201a is arranged in the side groove 203, and the inserting plate 201a corresponds to the inner annular groove 102.
The drill bit assembly 5 comprises a drill bit seat 501, wherein a chute 501a is formed in the drill bit seat 501, one end of a spring B502 is connected in the chute 501a, the other end of the spring B502 is connected with a drill bit disc 503, a spiral drill bit 504 is connected to the drill bit disc 503, and a crushing cutter 505 is connected to the spiral drill bit 504.
The machine body 1, the machine base 2, the tool rest 3 and the drill bit seat 501 are of circular structures, the number of the slots 202 is four and are uniformly distributed on the end face of the machine base 2, the number of the side slots 203 is four and are uniformly distributed on the outer side face of the machine base 2, the four supporting legs 301 are uniformly distributed on the periphery of the tool rest 3, one ends of the supporting legs 301 are connected with the tool rest 3, the other ends of the supporting legs 301 are connected in the slots 202, the crushing tooth cutters 4 are arranged on the supporting legs 301, and the drill bit assembly 5 is arranged at the center of the tool rest 3.
The drill plate 503 is connected with a clamping ring 503a, the clamping ring 503a is clamped in the chute 501a, and the spring B502 is disposed between the clamping ring 503a and the chute 501 a.
The inserting plate 201a is of an arc-shaped structure, and the number of the elastic rods 201b is three and the elastic rods are uniformly distributed on the inserting plate 201 a.
The clamping circular ring 503a is provided with a clamping block 506, the chute 501a is provided with a clamping groove 507, and the clamping block 506 is movably arranged in the clamping groove 507.
The body 1 is provided with a through hole corresponding to the card 201 a.
The utility model provides a broken drill bit for muddy water balance push bench, includes organism 1 to and install the frame 2 on its axle end, wherein, the installation component 201 has been accomodate to the hidden side tank 203 on the outer wall of frame 2, and then the in-process of frame 2 by inserting organism 1 axle head, installation component 201 then accomodates into side tank 203, until installation component 201 displacement is to the position in interior ring groove 102, it will stretch out and block into interior ring groove 102, improves the stability and the compactness of contact installation between the two.
An inner ring groove 102 is formed in the inner side wall of the annular groove 101 of the machine head 1, a side groove 203 is formed in the outer wall of the machine base 2, a slot 202 for installing the supporting leg 301 is welded on the outer side wall of the machine base 2, meanwhile, an installation assembly 201 is arranged in the side groove 203, the installation assembly 201 is composed of an inserting plate 201a and an elastic rod 201b, and the inserting plate 201a is installed at the shaft end of the elastic rod 201 b.
The elastic rod 201b is composed of a cylinder 201b-1, a spring A201b-2 and a cylinder 201b-3, and the cylinder 201b-1 and the cylinder 201b-3 are connected by the spring 201b-2, and the spring A201b-2 is disposed inside the cylinder 201 b-1.
When in use, when the stand 2 is clamped into the annular groove 101, the elastic rod 201b pushes the inserting plate 201a on the shaft end of the stand to enter the inner annular groove 102, and when the stand is in the process of insertion, the inserting plate 201a is pressed by the inner wall of the annular groove 101, and then the elastic rod 201b is pressed to shrink, so that the whole mounting assembly 201 is stored into the side groove 203 until the whole mounting assembly moves to the position where the inner annular groove 102 is located, the whole mounting assembly stretches out, the inner end face of the inserting plate 201a is clamped in the side groove (203), and the outer end face of the inserting plate 201a is clamped in the inner annular groove 102.
Example 2
The cutter rest 3, the crushing tooth cutter 4 and the drill bit assembly 5 are further provided, the drill bit seat 501 is connected with the drill bit disc 503 through the spring B502, and further when the spiral drill bit 504 on the drill bit disc 503 contacts stones, the impact phenomenon can be effectively buffered and prevented from being caused.
The outer wall of the tool rest 3 is detachably and fixedly provided with a crushing tooth cutter 4, the center of the tool rest 3 is provided with a drill bit assembly 5, the drill bit assembly 5 comprises a drill bit seat 501 and a spring B502 embedded in a sliding groove 501a, meanwhile, the drill bit seat 501 is connected with a drill bit disc 503 through the spring B502, a spiral drill bit 504 is arranged on the drill bit disc 503, and a clamping circular ring 503a on the rear side wall of the drill bit disc 503 is matched with the sliding groove 501 a.
The four side outer walls of the tool rest 3 are provided with the supporting legs 301, the crushing blades 505 are provided with two groups, the two groups of crushing blades 505 are arranged in an annular array, the crushing blades 505 are of arc-shaped structures, the crushing tooth blades 4 are of rectangular tower-shaped structures, and the cutting edge ends of the crushing blades 505 and the crushing tooth blades 4 are provided with saw tooth grooves.
When the drill bit assembly 5 on the shaft end of the machine body 1 is driven to contact the stone, the crushing cutter 505 on the outermost end of the machine body is firstly contacted with the stone, the sawtooth short end of the machine body forms a certain cutting phenomenon on the stone, then the spiral drill bit 504 is further contacted with the stone to crush the stone again, and the small stone formed after crushing is contacted with the crushing tooth cutter 4 to be crushed further, so that the small stone is absorbed by the machine body 1 and discharged.
By matching the clamping blocks 506 with the clamping grooves 507, the drill bit seat 501 drives the drill bit disc 503 to rotate more effort-saving.
The machine base 2 can be conveniently separated from the machine body 1 through the through hole, and the maintenance is convenient.
Through setting up frame 2, side tank 203 has been seted up around frame 2, and be provided with installation component 201 in the side tank 203 again, when during the use, when frame 2 card is gone into in the annular groove 101 on the end of organism 1, the picture peg 201a on its axle head will be pushed to the elastic rod 201b in the installation component 201 in the side tank 203, picture peg 201a enters into the interior annular groove 102 on the annular groove 101 inner wall, and when it is in the course of inserting, the picture peg receives the compressive force of annular groove 101 inner wall, and then compress elastic rod 201b shrink for whole installation component 201 accomodates and enters into in the side tank 203, stretch out when reaching its position of interior annular groove 102 place, and then improve the connection compactness between frame 2 and the organism 1, avoid it to produce phenomena such as break away from or shift when striking the stone.
Through setting up knife rest 3, broken tooth sword 4 and drill bit subassembly 5, broken tooth sword 4 is provided with four, and divide to establish on four landing leg 301 outer walls of knife rest 3, and the axle head of auger bit 504 is blunt mouthful setting in drill bit subassembly 5, and still be provided with broken sword 505 on blunt mouthful, wherein broken sword 505 is provided with two sets of altogether, two sets of broken sword 505 are annular array arrangement, broken sword 505 of above-mentioned is arc structure, broken tooth sword 4 is rectangular tower column structure, and the blade end of broken sword and broken tooth sword 4 has all offered the sawtooth groove, when during the use, when the contact of drill bit subassembly 5 with the stone, crashproof spring B502 of its rear side will play certain cushioning effect, avoid the blade roll-over phenomenon that the direct impact produced, simultaneously also can avoid knife rest and frame 2 of its rear side to receive huge force impact, and broken sword 505 and auger bit 504 can be better carry out drilling and breakage, broken tooth sword then is used for carrying out secondary breakage to the stone after the breakage, make it better by the organism handled.
The above description is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (5)
1. The crushing drill bit for the mud-water balance pipe jacking machine comprises a machine body (1), a machine base (2), a tool rest (3), a crushing tooth cutter (4) and a drill bit assembly (5), and is characterized in that an annular groove (101) is formed in the end face of the machine body (1), an inner annular groove (102) is formed in the inner side wall of the annular groove (101), a slot (202) and a side groove (203) are formed in the machine base (2), a mounting assembly (201) is arranged in the side groove (203), the mounting assembly (201) comprises an inserting plate (201 a), an elastic rod (201 b) is connected to the inserting plate (201 a), the elastic rod (201 b) comprises a cylinder (201 b-1), one end of a spring A (201 b-2) is connected to the inner cavity of the cylinder (201 b-1), one end of a cylinder (201 b-3) is connected to the other end of the spring A (201 b-2), and the other end of the cylinder (201 b-3) is fixed to the inserting plate (201 a).
The crushing tooth cutter (4) and the drill bit assembly (5) are both installed on the cutter frame (3), the cutter frame (3) is connected to the slot (202), the machine base (2) is arranged in the annular groove (101), the inserting plate (201 a) is arranged in the side groove (203), and the inserting plate (201 a) corresponds to the inner annular groove (102).
2. The crushing drill bit for the mud-water balance pipe jacking machine according to claim 1, wherein the drill bit assembly (5) comprises a drill bit seat (501), a chute (501 a) is arranged on the drill bit seat (501), one end of a spring B (502) is connected in the chute (501 a), the other end of the spring B (502) is connected with a drill bit disc (503), a spiral drill bit (504) is connected on the drill bit disc (503), and a crushing cutter (505) is connected on the spiral drill bit (504).
3. The crushing drill bit for the mud-water balance pipe jacking machine is characterized in that the machine body (1), the machine base (2), the tool rest (3) and the drill bit base (501) are of circular structures, four slots (202) are uniformly distributed on the end face of the machine base (2), four side slots (203) are uniformly distributed on the outer side face of the machine base (2), four supporting legs (301) are uniformly distributed on the periphery of the tool rest (3), one end of each supporting leg (301) is connected with the tool rest (3), the other end of each supporting leg is connected in the corresponding slot (202), crushing tooth cutters (4) are arranged on the corresponding supporting legs (301), and the drill bit assembly (5) is arranged at the center of the corresponding tool rest (3).
4. The crushing drill bit for the mud-water balanced pipe jacking machine according to claim 2, wherein the drill bit disc (503) is connected with a clamping circular ring (503 a), the clamping circular ring (503 a) is clamped in the sliding groove (501 a), and the spring B (502) is arranged between the clamping circular ring (503 a) and the sliding groove (501 a).
5. The crushing drill bit for the mud-water balanced pipe jacking machine according to claim 2, wherein the inserting plates (201 a) are of arc-shaped structures, and the elastic rods (201 b) are three and are uniformly distributed on the inserting plates (201 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421330076.6U CN222391391U (en) | 2024-06-12 | 2024-06-12 | A crushing drill bit for mud-water balance pipe jacking machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421330076.6U CN222391391U (en) | 2024-06-12 | 2024-06-12 | A crushing drill bit for mud-water balance pipe jacking machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222391391U true CN222391391U (en) | 2025-01-24 |
Family
ID=94287315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421330076.6U Active CN222391391U (en) | 2024-06-12 | 2024-06-12 | A crushing drill bit for mud-water balance pipe jacking machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222391391U (en) |
-
2024
- 2024-06-12 CN CN202421330076.6U patent/CN222391391U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112360490B (en) | Impact type pipe jacking machine cutter head | |
| CN222391391U (en) | A crushing drill bit for mud-water balance pipe jacking machine | |
| CN201381859Y (en) | Polygonal tube push bench with breaking function | |
| CN214132056U (en) | Axial pulverizer | |
| CN213557245U (en) | Crushing equipment with shock-absorbing structure | |
| CN109012942A (en) | A kind of lake water rubbish crushing recyclable device | |
| CN211829232U (en) | Grounding rod | |
| CN212189414U (en) | Grinding machine for coal mine production | |
| CN218742294U (en) | Fly ash ball-milling device that can double grinding | |
| CN211312128U (en) | Local milling equipment for pavement maintenance | |
| CN214708347U (en) | Electromechanical installation protection device that uses of colliery | |
| CN209779425U (en) | A breaker for hydraulic and hydroelectric engineering | |
| CN209882994U (en) | Coconut cutting mechanism and coconut treatment facility | |
| CN118120798B (en) | Energy-saving frozen meat block meat grinder | |
| CN221626781U (en) | Asphalt pavement breaker | |
| CN222384907U (en) | Coal breaker for thermal power factory | |
| CN113245337A (en) | Urban solid waste environmental protection landfill processing apparatus | |
| CN207525593U (en) | A kind of crusher for hydraulic and hydroelectric engineering | |
| CN218326514U (en) | Construction pipe jacking device | |
| CN119175145B (en) | A construction concrete block crushing device | |
| CN211937116U (en) | Breaker for broken system of reclaimed materials | |
| CN221042494U (en) | Bearing end cover easy for bearing installation | |
| CN118532181A (en) | A method for installing a balanced pipe jacking machine | |
| CN207044771U (en) | A kind of novel closed-type honeycomb briquet making making machine | |
| CN222810750U (en) | Button drill bit assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |