CN110548580A - Rotary combined tool bit for crushing and unfreezing pipeline and pipeline crushing and unfreezing device - Google Patents
Rotary combined tool bit for crushing and unfreezing pipeline and pipeline crushing and unfreezing device Download PDFInfo
- Publication number
- CN110548580A CN110548580A CN201910850349.7A CN201910850349A CN110548580A CN 110548580 A CN110548580 A CN 110548580A CN 201910850349 A CN201910850349 A CN 201910850349A CN 110548580 A CN110548580 A CN 110548580A
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- CN
- China
- Prior art keywords
- pipeline
- crushing
- cutter
- tool bit
- cutter head
- 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.)
- Pending
Links
- 238000010257 thawing Methods 0.000 claims abstract description 18
- 230000002528 anti-freeze Effects 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 10
- 238000007710 freezing Methods 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 5
- 230000008014 freezing Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000007798 antifreeze agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
Abstract
the invention discloses a rotary combined tool bit for crushing and unfreezing a pipeline and a pipeline crushing and unfreezing device. The pipeline crushing and thawing device comprises a rotary combined tool bit for crushing and thawing the pipeline, a motor mounting seat, an antifreeze solution storage tank arranged at the rear end of the motor mounting seat, a spray head arranged at the rear end of the antifreeze solution storage tank and at least 3 walking wheels arranged on the outer side of the motor mounting seat at intervals around the circumferential direction, wherein a driving motor for driving the walking wheels to walk along the inner wall of the pipeline is also arranged in the motor mounting seat; the output end of the motor is in transmission connection with the cutter bar and is used for driving the cutter bar to rotate around the axis. The pipeline crushing and unfreezing device is used for unfreezing and plugging pipelines in alpine regions, and can greatly improve the unfreezing efficiency through a mode of bidirectional damage from the periphery to the center and from the center to the periphery.
Description
Technical Field
The invention relates to the technical field of pipeline unfreezing and blocking, in particular to a rotary combined tool bit for crushing and unfreezing a pipeline and a pipeline crushing and unfreezing device.
Background
In winter, the temperature in the alpine region can reach twenty ℃ below zero, and even some regions can reach forty ℃ below zero. Although the technology in the field of modern conveying pipelines is relatively mature, certain measures such as heat preservation, heating, mixing and the like are adopted, so that the liquid conveying pipeline cannot be frozen and blocked under common conditions. However, once such accidents happen, the loss caused by the accidents is not small. The current common method is to use hot water or a steam vehicle to heat after the heat-insulating layer is removed; meanwhile, an air compressor is used for forcibly extruding the pipeline, so that a large amount of pipeline liquid overflows, and the environmental pollution is caused; the air compressor forcibly extrudes the pipeline to cause problems of overpressure perforation, cracks and the like of the pipeline to appear frequently, the dredging time is slow, the heat efficiency is low, and a large amount of heat energy is consumed. In addition, once the large-scale water pipe is frozen and blocked, the blockage removing work is difficult. To reduce economic losses, it is desirable to restore pipeline operation as quickly as possible.
Disclosure of Invention
The invention aims to solve the problem in the unfreezing and blocking process of the pipeline, and provides a rotary combined cutter head and a pipeline unfreezing and blocking device based on the combined cutter head.
In order to achieve the purpose, the invention adopts the following technical scheme:
A rotary gang head for crushing and thawing a pipe, comprising:
The middle of the tool bit mounting plate is provided with a mounting through hole, and a discharge port is formed in a position staggered from the mounting through hole;
The central cutter head comprises a conical cutter head and a cutter bar, the conical cutter head comprises a base and a blade arranged around the base, the rear end of the base is connected with the front end of the cutter bar, and the rear part of the cutter bar is axially inserted into the mounting through hole;
The peripheral cutter head comprises at least 3 cutter teeth arranged on the periphery of the central cutter head in the circumferential direction, the cutter teeth are arranged on a cutter head mounting plate positioned on one side of the central cutter head, the cutter teeth are spaced from the central cutter head and staggered with the discharge port, the cutter teeth are in a pyramid shape, at least the rear part of the inner side of the pyramid is provided with a notch, and one side surface of the pyramid is a curved surface attached to the inner wall of the pipeline; the front ends of the central cutter head and the peripheral cutter head are positioned in the same vertical plane, and when the cutter bar is rotated around the axis, the central cutter head, the cutter head mounting plate and the peripheral cutter head can synchronously rotate. The peripheral tool bit is split type, namely, the peripheral tool bit is composed of independent cutter teeth arranged on the tool bit mounting plate, the damaged cutter teeth can be replaced at any time by the split type peripheral tool bit, the peripheral tool bit does not need to be replaced integrally, and cost is saved.
Preferably, the base is removably attached to the blade. Furthermore, the base is conical, inserting grooves are uniformly and alternately formed in the rear portion of the outer wall of the base in a surrounding mode, and the blades are detachably inserted into the inserting grooves, so that the blades can be replaced conveniently. The blade can be straight or wave shape, straight blade mainly used overcome the less stifled thing of freezing of hardness and required motor power less, wave shape blade mainly overcomes the great stifled thing of freezing of hardness and required motor power more, and when base and blade can be dismantled and be connected, can change the blade of different shapes as required.
in order to facilitate the better cooperation pipeline inner wall of rotatory combination tool bit, make peripheral tool bit can thoroughly smash the stifled thing of freezing in the pipeline under the prerequisite that does not harm the pipeline outer wall to go forward smoothly and retreat, as preferred, the outside edge contour line of tool bit mounting panel is circular with pipeline inner wall matched with, peripheral tool bit sets up the outside edge at the tool bit mounting panel around the circumferencial direction. Furthermore, the tool bit mounting plate comprises an outer ring, an inner ring concentrically arranged in the outer ring and connecting rods arranged between the outer ring and the inner ring and used for connecting the outer ring and the inner ring, the outer ring and the inner ring between two adjacent connecting rods jointly enclose the discharge port, and the inner ring is the mounting through hole.
A pipe crushing and thawing apparatus, comprising:
The rotary combined cutter head for crushing and unfreezing the pipeline, the motor mounting seat, the antifreeze solution storage tank arranged at the rear end of the motor mounting seat, the spray head arranged at the rear end of the antifreeze solution storage tank and at least 3 travelling wheels arranged on the outer side of the motor mounting seat at intervals in the circumferential direction are arranged, and a driving motor for driving the travelling wheels to travel along the inner wall of the pipeline is further arranged in the motor mounting seat; the output end of the motor is in transmission connection with the cutter bar and is used for driving the cutter bar to rotate around the axis.
As preferred, the motor mount pad is including being used for the installation the motor installation cavity of motor and the supporting part that sets up around the motor installation cavity, the walking wheel is installed the outer end of supporting part, driving motor installs in the supporting part, the supporting part supports at the pipeline inner wall through the walking wheel for thereby prevent that the motor is unsettled to influence its stability.
Compared with the prior art, the invention has the following technical effects: (1) the rotary combined cutter head for crushing and unfreezing the pipeline comprises a conical central cutter head and a peripheral cutter head arranged around the central cutter head, wherein the peripheral cutter head comprises at least 3 cutter teeth arranged on a cutter head mounting plate around the central cutter head, the inner sides of the cutter teeth are in a pyramid shape, at least the rear part of the inner sides of the cutter teeth is provided with a notch, one side surface of the pyramid shape is a curved surface attached to the inner wall of the pipeline, and the cutter head mounting plate provided with a discharge port is combined, so that the circular section of the pipeline is fully crushed and unfrozen; on the other hand, the crushed material is assisted to move backwards to prevent the crushed material from interfering with the operation of the device and reduce the energy consumption of the motor. (2) The central cutter head is used for freezing and blocking the central part of the broken pipeline, the peripheral cutter head is used for breaking and unfreezing frozen and blocked objects at the outer side parts, and all end points of the front ends of the peripheral cutter head and the central cutter head are positioned in the same vertical plane, so that unfreezing work can be conducted to break the frozen and blocked objects from the periphery to the center and from the center to the periphery in a two-way mode. (3) The materials of all the components of the rotary combined cutter head for crushing and unfreezing the pipeline can be selected according to the requirements, for example, when the hardness of frozen blockage is small or the blockage distance is short, a material with a small yield limit can be selected, and conversely, a material with a large yield limit can be selected. (4) The knife teeth are surrounded to form a peripheral knife head, and at least a notch is arranged at the rear end of the inner side of the knife teeth, so that a cavity is formed and can be used for placing a positioning device, a detection device, an antifreeze agent spraying device and the like.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a right side view of a pipe break-up thawing apparatus in an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a schematic view of a cutter head mounting plate of the pipeline crushing and thawing device in an embodiment of the invention;
FIG. 5 is a right side view of the motor mount of the pipe break-up thawing apparatus in an embodiment of the present invention;
FIG. 6(1) is a front view of the central cutter head of the pipe-crushing thawing apparatus in the embodiment of the present invention;
FIG. 6(2) is a left side view of FIG. 6 (1);
FIG. 7(1) is a front view of the base of the central cutter head in the tube crushing and thawing apparatus in an embodiment of the present invention;
FIG. 7(2) is a left side view of FIG. 7 (1);
FIG. 7(3) is a sectional view taken along line B-B in FIG. 7 (2);
fig. 8 is a right side view of a center line cutter head provided with a wave shaped blade.
Labeled as: 1. the anti-freezing device comprises a central cutter head, 1-1 conical cutter head, 1-1-1 base, 1-1-2 cutter blades, 1-2 cutter bars, 2 peripheral cutter heads, 2-1 cutter teeth, 3 cutter head mounting plates, 3-1 mounting through holes, 3-2 discharge ports, 4 motors, 5 motor mounting seats, 5-1 motor mounting cavities, 5-2 supporting parts, 6 rotating shafts, 7 anti-freezing liquid storage tanks, 8 spray heads and 9 travelling wheels.
detailed description of the preferred embodiments
The invention is described in more detail below with reference to the following examples:
As shown in fig. 1 to 5, 6(1), 6(2), and 7(1) to 7(3), a pipe-crushing and thawing apparatus comprises a rotary combined cutter head for crushing and thawing pipes, a motor mounting seat 5, an antifreeze solution storage tank 7 welded to the rear end of the motor mounting seat, a spray head 8 disposed at the rear end of the antifreeze solution storage tank 7 and used for communicating with the antifreeze solution storage tank, and 4 traveling wheels 9 disposed at intervals around the circumference outside the motor mounting seat 5, wherein a driving motor for driving the traveling wheels 9 to travel along the inner wall of the pipe is further disposed in the motor mounting seat 5; the output end of the motor 4 is in transmission connection with the cutter bar 1-2 and is used for driving the cutter bar to rotate around the axis. The supporting part 5-2 of the travelling wheel 9 is arranged for preventing the motor installation cavity 5-1 from being suspended so as to influence the stability of the motor installation cavity.
the motor mounting seat 5 comprises a motor mounting cavity 5-1 for mounting the motor 4 and a supporting part 5-1 arranged around the motor mounting cavity, the walking wheel 9 is mounted at the outer end of the supporting part 5-1, and the driving motor is mounted in the supporting part 5-1. During the use, motor 4 installs in the motor installation intracavity, sets up the driving motor who sets up at the supporting part and is used for the walking of driven wheel at the pipeline inner wall, and then realizes advancing or retreating of broken thawing apparatus of pipeline in the pipeline.
The cutter arbor of center tool bit 1 can further be connected with motor 4's output through pivot 6, and is specific, cutter arbor rear end and 6 coaxial coupling (accessible coupling joint, or the key-type connection) of pivot, the rear end of pivot 6 and motor 4's output shaft (accessible coupling joint, or the key-type connection).
The rotary combined cutter head for crushing comprises a cutter head mounting plate 3, a central cutter head 1 and a peripheral cutter head 2. The peripheral cutter head 2 is arranged around the central cutter head 1 and is arranged at the same side of the cutter head mounting plate 3 at intervals.
specifically, the method comprises the following steps: the middle of the cutter head mounting plate 3 is provided with a mounting through hole 3-1, and the position staggered with the mounting through hole 3-1 is provided with a discharge port 3-2.
The central cutter head 1 comprises a conical cutter head 1-1 and a cutter bar 1-2, the conical cutter head 1-1 comprises a base 1-1-1 and a cutter blade 1-1-2 arranged around the base, the rear end of the base 1-1-1 is connected with the front end of the cutter bar (1-2), and the rear part of the cutter bar 1-2 is inserted into the mounting through hole 3-1 along the axial direction.
The peripheral tool bit 2 comprises 6 cutter teeth 2-1 which are uniformly arranged on the periphery of the central tool bit 1 in the circumferential direction and are installed on the tool bit installation plate 3 through screws, the cutter teeth 2-1 are spaced from the central tool bit 1 and staggered with the discharge ports 3-2, the cutter teeth 2-1 are triangular pyramids, one side surface (namely the outer side) of each triangular pyramid is a curved surface attached to the inner wall of the pipeline, the rear parts of the inner sides of the triangular pyramids are provided with notches, the notches form cavities, and the bottom walls of the notches are used as installation platforms for placing positioning devices, detection devices, anti-freezing reagent spraying devices and the like (the front parts of the cutter teeth are sharp parts). The front ends of the central cutter head 1 and the peripheral cutter head 2 are positioned in the same vertical plane, when the cutter bar is rotated around the axis, the central cutter head 1, the cutter head mounting plate 3 and the peripheral cutter head 2 can synchronously rotate, and the cutting parts of the cutter teeth 2-1 are arranged on two sides of a curved surface attached to the pipeline.
More specifically, the rear end of the base 1-1-1 is coaxially connected with the front end of the cutter bar 1-2 (the two can be connected by screw threads or directly welded, or by a clamping manner, a polygonal blind hole is formed on the end surface of the rear end of the concrete base, the front end of the cutter bar is matched with the polygonal blind hole, the front end of the cutter bar is inserted into the polygonal blind hole and then fixed by a fixing manner customary in the art, namely, fixed by a fixing pin inserted into the position of the cutter bar at the rear end of the polygonal blind hole to prevent the cutter bar from being separated from the base, when the cutter bar is connected with the base by screw threads, a fixing pin can be further added for fixing), and the rear part of the cutter bar 1-2 is axially and coaxially inserted into the mounting through. The base 1-1-1 and the blade 1-1-2 are detachably mounted, specifically, the base 1-1-1 is conical, slots are uniformly and alternately formed around the rear portion of the outer wall of the base, the blade 1-1-1 is detachably inserted into the slots, an annular plate is mounted at the rear end of the base 1-1-1 and connected with the base through screws, and the annular plate is used for blocking the blade from the rear end to prevent the blade from falling off. An annular plate which can be screwed on the conical central cutter head 1 is arranged behind the central cutter head 1 to prevent the blades from falling off. (in order to prevent the blade from breaking away from the base from the lateral part, the annular panel can further select for use disk-shaped annular panel, and the annular panel outside is equipped with annular lateral wall promptly, and annular lateral wall offers the mounting groove corresponding with the blade rear portion, and during the installation, annular lateral wall is used for laminating with base lateral wall rear portion, and blade rear portion embedding mounting groove, and then forms the spacing portion of blade in side, with the blade spacing in the slot). The blade in this embodiment is straight, and the blade may be set to be wave-shaped as required, as shown in fig. 8.
The cutter head mounting plate 3 comprises an outer ring, an inner ring concentrically arranged in the outer ring and connecting rods arranged between the outer ring and the inner ring and used for connecting the outer ring and the inner ring, the outer ring and the inner ring between two adjacent connecting rods jointly form the discharge port 3-2, the inner ring is an installation through hole 3-1, and the discharge port 3-2 is used for discharging frozen blockage after crushing.
the pipeline crushing and unfreezing device can be put into use at the inlet of the pipeline, and also can be put into use after a part of the pipeline is dug before the frozen and blocked section of the pipeline occurs; for the problem that the frozen blockage can be frozen after being broken, an additional device is needed to spray the anti-freezing solution on the broken blockage to prevent secondary freezing blockage; because the volume of frozen blockage of the pipeline is not determined, the invention does not provide a recovery device for the crushed objects on the blockage removing device to meet the requirements of different occasions, and for the problem of recovery, a leather cup or other similar devices can be adopted, and the crushed objects can be driven out of the pipeline in a mode of pushing by water or a pipeline conveying medium doped with antifreeze at the upstream, and then are treated and recovered.
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.
Claims (8)
1. the utility model provides a pipeline is broken unfreezes with rotatory combination tool bit which characterized in that: the method comprises the following steps:
The cutter head mounting plate (3), the middle of the cutter head mounting plate (3) is provided with a mounting through hole (3-1), and a discharge port (3-2) is arranged at a position staggered from the mounting through hole (3-1);
The center cutter head (1) comprises a conical cutter head (1-1) and a cutter bar (1-2), the conical cutter head (1-1) comprises a base (1-1-1) and a cutter blade (1-1-2) arranged around the base, the rear end of the base (1-1-1) is connected with the front end of the cutter bar (1-2), and the rear part of the cutter bar (1-2) is axially inserted into the mounting through hole (3-1);
The cutting tool comprises a peripheral tool bit (2), wherein the peripheral tool bit (2) comprises at least 3 cutter teeth (2-1) which are arranged on the periphery of a central tool bit (1) in the circumferential direction, the cutter teeth (2-1) are arranged on a tool bit mounting plate (3) which is positioned on one side of the central tool bit, the cutter teeth (2-1) are spaced from the central tool bit (1) and staggered with the discharge port (3-2), the cutter teeth (2-1) are in a pyramid shape, at least the rear part of the inner side of the cutter teeth is provided with a notch, one side surface of the pyramid shape is a curved surface which is attached to the inner wall of the pipeline, and the sharp part of the pyramid shape faces the; the front ends of the central cutter head (1) and the peripheral cutter head (2) are located in the same vertical plane, and when the cutter bar is rotated around the axis, the central cutter head (1), the cutter head mounting plate (3) and the peripheral cutter head (2) can rotate synchronously.
2. The rotary cutter assembly for crushing and thawing pipes as set forth in claim 1, wherein: the base (1-1-1) is detachably connected with the blade (1-1-2).
3. The rotary cutter assembly for crushing and thawing pipes as set forth in claim 1, wherein: the base (1-1-1) is conical, inserting grooves are uniformly and alternately formed around the rear portion of the outer wall of the base, and the blades (1-1-1) are detachably inserted into the inserting grooves.
4. the rotary cutter assembly for crushing and thawing according to any one of claims 1 to 3, wherein: the blade is straight or wave-shaped.
5. The rotary cutter assembly for crushing and thawing pipes as set forth in claim 1, wherein: the outside edge contour line of tool bit mounting panel (3) is circular with pipeline inner wall matched with, peripheral tool bit (2) set up the outside edge at tool bit mounting panel (3) around the circumferencial direction.
6. The rotary cutter assembly for crushing and thawing pipes as set forth in claim 5, wherein: the tool bit mounting plate (3) comprises an outer ring, an inner ring concentrically arranged in the outer ring and connecting rods arranged between the outer ring and the inner ring and used for connecting the outer ring and the inner ring, the outer ring and the inner ring between two adjacent connecting rods jointly enclose the discharge port (3-2), and the inner ring is the mounting through hole (3-1).
7. The utility model provides a device is unfrozen in pipeline crushing which characterized in that: the combined rotary cutter head for crushing and unfreezing the pipeline comprises the combined rotary cutter head for crushing and unfreezing the pipeline as claimed in any one of claims 1 to 6, a motor (4), a motor mounting seat (5), an antifreeze solution storage tank (7) arranged at the rear end of the motor mounting seat, a spray head (8) arranged at the rear end of the antifreeze solution storage tank (7) and at least 3 travelling wheels (9) arranged on the outer side of the motor mounting seat (5) at intervals along the circumferential direction, wherein a driving motor for driving the travelling wheels (9) to travel along the inner wall of the pipeline is further arranged in the motor mounting seat (5); the output end of the motor (4) is in transmission connection with the cutter bar (1-2) and is used for driving the cutter bar to rotate around the axis.
8. the pipe crushing and thawing apparatus of claim 7, wherein: the motor mounting seat (5) comprises a motor mounting cavity (5-1) for mounting a motor (4) and a supporting part (5-2) arranged around the motor mounting cavity, the walking wheel (9) is mounted at the outer end of the supporting part (5-2), and the driving motor is mounted in the supporting part (5-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910850349.7A CN110548580A (en) | 2019-09-10 | 2019-09-10 | Rotary combined tool bit for crushing and unfreezing pipeline and pipeline crushing and unfreezing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910850349.7A CN110548580A (en) | 2019-09-10 | 2019-09-10 | Rotary combined tool bit for crushing and unfreezing pipeline and pipeline crushing and unfreezing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110548580A true CN110548580A (en) | 2019-12-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910850349.7A Pending CN110548580A (en) | 2019-09-10 | 2019-09-10 | Rotary combined tool bit for crushing and unfreezing pipeline and pipeline crushing and unfreezing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110548580A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112676263A (en) * | 2021-01-15 | 2021-04-20 | 中铁建电气化局集团第四工程有限公司 | Cleaning and sucking machine for sundry dirt in rail passing pipe and working method thereof |
| CN112705533A (en) * | 2021-01-25 | 2021-04-27 | 成都和拓土木工程有限公司 | Blind pipe dredging and detecting integrated equipment |
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