CN113668687A - Flange device with pipeline dredging function - Google Patents
Flange device with pipeline dredging function Download PDFInfo
- Publication number
- CN113668687A CN113668687A CN202110974629.6A CN202110974629A CN113668687A CN 113668687 A CN113668687 A CN 113668687A CN 202110974629 A CN202110974629 A CN 202110974629A CN 113668687 A CN113668687 A CN 113668687A
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- Prior art keywords
- piston
- pipeline
- cavity
- air
- cutting blade
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- 238000007599 discharging Methods 0.000 claims abstract description 7
- 230000000740 bleeding effect Effects 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 239000010865 sewage Substances 0.000 description 13
- 230000009467 reduction Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
- E03F9/002—Cleaning sewer pipes by mechanical means
-
- 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
- B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
- B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
-
- 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
- B02C18/02—Disintegrating by knives or other cutting or tearing members which chop material into fragments with reciprocating knives
-
- 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
- B02C18/02—Disintegrating by knives or other cutting or tearing members which chop material into fragments with reciprocating knives
- B02C18/04—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
- B02C2201/063—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage for waste water or sewage
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sink And Installation For Waste Water (AREA)
Abstract
The invention discloses a flange device with a pipeline dredging function, which comprises a connecting sleeve sleeved on the outer wall of a pipeline, wherein the inner wall of the connecting sleeve is outwards sunken to form a cavity communicated with the pipeline, and a plurality of dredging components are arranged on the connecting sleeve in a surrounding manner; the dredging component comprises a cutting blade hinged in the cavity, the cutting blade can be rotated to enable the cutting blade to approach the pipeline in the axis direction, a piston sleeve communicated with the cavity is arranged on the outer wall of the connecting sleeve, a piston is movably arranged in the piston sleeve, the piston divides the piston sleeve into an air inlet cavity and a plug rod cavity, a piston rod is arranged in the plug rod cavity, one end of the piston rod is connected with the piston, and the other end of the piston rod is hinged with the cutting blade; the outer wall of the connecting sleeve is respectively fixed with an air pump and an air discharging structure; the problem of the pipeline that is used for the blowdown easily blocks up is solved.
Description
Technical Field
The invention relates to pipeline dredging equipment, in particular to a flange device with a pipeline dredging function.
Background
The sewage pipeline system consists of pipelines for collecting and conveying urban sewage and accessory structures thereof. The sewage flows into the main pipe from the branch pipe, then flows into the main pipe and finally flows into a sewage treatment plant. The pipelines are distributed like rivers from small to large in a tree shape and are completely different from the circulation through condition of a water supply pipe network. The sewage flows from high to low in the pipeline generally by the water surface difference at two ends of the pipeline, and the inside of the pipeline does not bear pressure, namely the sewage flows by gravity. A pipeline for the blowdown blocks up easily, and the plug agglomerates in the pipeline easily, if do not clear up the reduction that causes the blowdown flow easily for a long time and block up completely, because the pipeline is enclosed construction and lays longer for its inside plug is difficult to regularly clear up.
Therefore, the invention provides a flange device capable of cutting and crushing large foreign matters in a sewage pipeline.
Disclosure of Invention
The invention aims to provide a flange device with a pipeline dredging function, which solves the problems that a pipeline for sewage discharge is easy to block, a blockage is easy to agglomerate in the pipeline, and the sewage discharge flow is easy to reduce and completely block if the pipeline is not cleaned for a long time, and the blockage in the pipeline is difficult to clean regularly because the pipeline is of a closed structure and is laid for a long time.
In order to achieve the purpose, the invention provides a flange device with a pipeline dredging function, which comprises a connecting sleeve sleeved on the outer wall of a pipeline, wherein the inner wall of the connecting sleeve is outwards sunken to form a cavity communicated with the pipeline, and a plurality of dredging components are arranged on the connecting sleeve in an encircling manner; the dredging component comprises a cutting blade hinged in the cavity, the cutting blade can be rotated to enable the cutting blade to approach the axis direction of the pipeline, a piston sleeve communicated with the cavity is arranged on the outer wall of the connecting sleeve, a piston is movably arranged in the piston sleeve, the piston divides the piston sleeve into an air inlet cavity and a plug rod cavity, a piston rod is arranged in the plug rod cavity, one end of the piston rod is connected with the piston, the other end of the piston rod is hinged with the cutting blade, and a spring is sleeved on the piston rod; the outer wall of the connecting sleeve is respectively fixed with an air pump and an air discharging structure, and the air pump connects the air inlet cavities of the piston sleeves in series through a first hose; the connecting sleeve is also provided with a closed second hose which is respectively communicated with the air inlet cavity through branch pipes, and the second hose is also communicated with the air discharging structure through a connecting pipeline; the air bleeding structure comprises a shell and an opening and closing assembly arranged on the shell, wherein a first air bleeding hole is formed in the shell, so that the opening and closing assembly can open or close the first air bleeding hole periodically.
Preferably, the side wall of the housing is provided with an air inlet pipe communicated with the connecting pipeline.
Preferably, the upper end of the shell is provided with the first air vent, the opening and closing assembly comprises a rotary disc which is rotatably arranged on the upper surface of the shell, the rotary disc is provided with a second air vent, and the first air vent is communicated with the second air vent by rotating the rotary disc.
Preferably, a support located above the turntable is fixed on the shell, a speed reduction motor is arranged on the support, and an output shaft of the speed reduction motor is coaxially connected with the turntable.
Preferably, the edge of the rotating disc extends downwards to form an annular rotating part, the upper surface of the shell is recessed downwards to form an annular groove, and the annular rotating part is rotatably clamped in the annular groove.
Preferably, the annular groove is rotatably provided with a ball, and the ball is at least partially in contact with the annular rotating part first.
Preferably, the end of the cutting blade is hinged within the cavity by a pin.
Preferably, an opening of the piston sleeve extends inwards to form an annular pressing portion, one end of the spring is connected with the piston, and the other end of the spring is connected with the annular pressing portion.
Preferably, the connecting sleeve connects the two pipes by a screw assembly, so that a gap is left between the two pipes, and the cutting blade can rotate into the pipe through the gap.
Preferably, the number of the dredging assemblies is not less than 3, and a plurality of groups of the dredging assemblies are distributed at equal angles along the circumferential direction of the pipeline.
The invention provides a flange device with a pipeline dredging function, which comprises a connecting sleeve sleeved on the outer wall of a pipeline, wherein the inner wall of the connecting sleeve is outwards sunken to form a cavity communicated with the pipeline, and a plurality of dredging components are arranged on the connecting sleeve in an encircling manner; the dredging component comprises a cutting blade hinged in the cavity, the cutting blade can be rotated to enable the cutting blade to approach the axis direction of the pipeline, a piston sleeve communicated with the cavity is arranged on the outer wall of the connecting sleeve, a piston is movably arranged in the piston sleeve, the piston divides the piston sleeve into an air inlet cavity and a plug rod cavity, a piston rod is arranged in the plug rod cavity, one end of the piston rod is connected with the piston, the other end of the piston rod is hinged with the cutting blade, and a spring is sleeved on the piston rod; the outer wall of the connecting sleeve is respectively fixed with an air pump and an air discharging structure, and the air pump connects the air inlet cavities of the piston sleeves in series through a first hose; the connecting sleeve is also provided with a closed second hose which is respectively communicated with the air inlet cavity through branch pipes, and the second hose is also communicated with the air discharging structure through a connecting pipeline; the air bleeding structure comprises a shell and an opening and closing assembly arranged on the shell, wherein a first air bleeding hole is formed in the shell, so that the opening and closing assembly can open or close the first air bleeding hole periodically. When sewage or wastewater containing large foreign matters is conveyed by a sewage discharge pipeline, the large foreign matters are easy to accumulate to block the pipeline, air can be conveyed into the air inlet cavity of each piston sleeve by starting the air pump, so that the cutting blades are pushed by the piston and the piston rod to move towards the center of the pipeline, meanwhile, the motor is reduced to drive the turntable to rotate, so that the first air release holes are opened or closed periodically, the interval time is controlled by adjusting the speed of the speed reducing motor, for example, the first air release holes are opened every 10s, when the first air release holes are in a closed state, the piston rod pushes the cutting blades to the center line of the pipeline, when the first air release holes are opened approximately, the air conveyed by the air pump is discharged through the shell along the second hose, the air pressure in the air inlet cavity is reduced at the moment, the piston rod is reset through the action of the spring, so that the cutting blades are reset, and the state that a plurality of cutting blades are cut in a reciprocating manner can be achieved, therefore, the passing foreign matters are cut and crushed, and subsequent blockage caused by flowing of the larger foreign matters in the pipeline is avoided.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a view showing a first state of a flange device according to the present invention;
FIG. 2 is a structural view of a flange apparatus according to the present invention in a second state;
FIG. 3 is a block diagram of a bleed structure in a flange apparatus provided by the present invention;
fig. 4 is a schematic view of the connection of the flange device provided by the present invention to a pipeline.
Description of the reference numerals
1-a pipeline; 2-connecting sleeves; 3-a pin shaft; 4-a cutting blade; 5-a piston sleeve; 6-a spring; 7-a piston rod; 8-an air inlet cavity; 9-a piston; 10-a first hose; 11-an air pump; 12-a branch pipe; 13-a second hose; 14-connecting a pipe; 15-a gas release structure; 16-an air inlet pipe; 17-a first bleed hole; 18-a second bleed hole; 19-a turntable; 20-a scaffold; 21-a reduction motor; 22-ball bearing.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As shown in fig. 1-4: the invention provides a flange device with a pipeline dredging function, which comprises a connecting sleeve 2 sleeved on the outer wall of a pipeline 1, wherein the inner wall of the connecting sleeve 2 is outwards sunken to form a cavity communicated with the pipeline 1, and a plurality of dredging components are arranged on the connecting sleeve 2 in an encircling manner; the dredging component comprises a cutting blade 4 hinged in the cavity, the cutting blade 4 can be rotated to enable the cutting blade to approach towards the axis direction of the pipeline 1, a piston sleeve 5 communicated with the cavity is arranged on the outer wall of the connecting sleeve 2, a piston 9 is movably arranged in the piston sleeve 5, the piston 9 divides the piston sleeve 5 into an air inlet cavity 8 and a plug rod cavity, a piston rod 7 is arranged in the plug rod cavity, one end of the piston rod 7 is connected with the piston 9, the other end of the piston rod 7 is hinged with the cutting blade 4, and a spring 6 is sleeved on the piston rod 7; an air pump 11 and an air discharging structure 15 are respectively fixed on the outer wall of the connecting sleeve 2, and the air pump 11 connects the air inlet cavities 8 of the piston sleeves 5 in series through a first hose 10; the connecting sleeve 2 is further provided with a closed second hose 13, the second hose 13 is respectively communicated with the air inlet cavity 8 through a branch pipe 12, and the second hose 13 is also communicated with the air discharge structure 15 through a connecting pipeline 14; the air release structure 15 comprises a shell and an opening and closing assembly arranged on the shell, wherein a first air release hole 17 is formed in the shell, so that the opening and closing assembly can open or close the first air release hole 17 periodically. When sewage or wastewater containing large foreign matters is conveyed by a sewage discharge pipeline, the large foreign matters are easy to accumulate to block the pipeline, air can be conveyed into the air inlet cavity of each piston sleeve by starting the air pump, so that the cutting blades are pushed by the piston and the piston rod to move towards the center of the pipeline, meanwhile, the motor is reduced to drive the turntable to rotate, so that the first air release holes are opened or closed periodically, the interval time is controlled by adjusting the speed of the speed reducing motor, for example, the first air release holes are opened every 10s, when the first air release holes are in a closed state, the piston rod pushes the cutting blades to the center line of the pipeline, when the first air release holes are opened approximately, the air conveyed by the air pump is discharged through the shell along the second hose, the air pressure in the air inlet cavity is reduced at the moment, the piston rod is reset through the action of the spring, so that the cutting blades are reset, and the state that a plurality of cutting blades are cut in a reciprocating manner can be achieved, therefore, the passing foreign matters are cut and crushed, and subsequent blockage caused by flowing of the larger foreign matters in the pipeline is avoided.
In a preferred embodiment of the present invention, in order to facilitate the connection of the connection duct 14 with the casing, the side wall of the casing is provided with an intake duct 16 communicating with the connection duct 14.
In a preferred embodiment of the present invention, in order to periodically open and close the first air vent 17, the upper end of the housing is formed with the first air vent 17, the opening and closing assembly includes a rotary plate 19 rotatably disposed on the upper surface of the housing, the rotary plate 19 is formed with a second air vent 18, and the first air vent 17 and the second air vent 18 can be communicated by rotating the rotary plate 19.
In a preferred embodiment of the present invention, in order to drive the rotating disc 19 to rotate, so as to periodically open or close the first air vent 17, a bracket 20 located above the rotating disc 19 is fixed on the housing, a speed reduction motor 21 is arranged on the bracket 20, and an output shaft of the speed reduction motor 21 is coaxially connected with the rotating disc 19.
In a preferred embodiment of the present invention, in order to prevent the rotating disc 19 from shifting during the rotation process, the rotation of the rotating disc is limited, an annular rotating part is formed by extending the edge of the rotating disc 19 downwards, an annular groove is formed by recessing the upper surface of the housing downwards, and the annular rotating part is rotatably clamped in the annular groove.
In a preferred embodiment of the invention, in order to enable the rotating disk to rotate more smoothly in the annular groove, balls 22 are rotatably arranged in the annular groove, and at least part of the balls 22 are in first contact with the annular rotating part.
In a preferred embodiment of the invention, in order to allow a smoother rotation of the cutting blade 4, the end of the cutting blade 4 is hinged inside the cavity by means of a pin 3.
In a preferred embodiment of the present invention, in order to enable the spring 6 to be smoothly compressed and expanded and prevent the spring from popping out from the piston sleeve 5, an annular pressing portion is formed at an opening of the piston sleeve 5 and extends inwards, one end of the spring 6 is connected with the piston 9, and the other end of the spring is connected with the annular pressing portion.
In a preferred embodiment of the present invention, in order to facilitate the cutting blade 4 to rotate into the pipe 1 and cut the foreign materials inside, the connecting sleeve 2 connects the two pipes 1 by a screw assembly, so that a gap is left between the two pipes 1, and the cutting blade 4 can rotate into the pipe 1 through the gap.
In a preferred embodiment of the present invention, in order to improve the dredging effect, the number of the dredging assemblies is not less than 3, and a plurality of groups of the dredging assemblies are distributed at equal angles along the circumferential direction of the pipeline 1.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The flange device with the pipeline dredging function is characterized by comprising a connecting sleeve (2) sleeved on the outer wall of a pipeline (1), wherein the inner wall of the connecting sleeve (2) is outwards sunken to form a cavity communicated with the pipeline (1), and a plurality of dredging components are arranged on the connecting sleeve (2) in an encircling manner;
the dredging component comprises a cutting blade (4) hinged in the cavity, the cutting blade (4) can be rotated to enable the cutting blade to approach the pipeline (1) in the axial direction, a piston sleeve (5) communicated with the cavity is arranged on the outer wall of the connecting sleeve (2), a piston (9) is movably arranged in the piston sleeve (5), the piston (9) divides the interior of the piston sleeve (5) into an air inlet cavity (8) and a plug rod cavity, a piston rod (7) is arranged in the plug rod cavity, one end of the piston rod (7) is connected with the piston (9), the other end of the piston rod is hinged with the cutting blade (4), and a spring (6) is sleeved on the piston rod (7);
an air pump (11) and an air discharging structure (15) are respectively fixed on the outer wall of the connecting sleeve (2), and the air pump (11) is used for serially connecting the air inlet cavities (8) of the piston sleeves (5) through a first hose (10); the connecting sleeve (2) is also provided with a closed second hose (13), the second hose (13) is respectively communicated with the air inlet cavity (8) through a branch pipe (12), and the second hose (13) is also communicated with the air bleeding structure (15) through a connecting pipeline (14);
the air release structure (15) comprises a shell and an opening and closing assembly arranged on the shell, wherein a first air release hole (17) is formed in the shell, so that the opening and closing assembly can open or close the first air release hole (17) periodically.
2. The flange device with the pipe dredging function according to claim 1, wherein the side wall of the housing is provided with an air inlet pipe (16) communicated with the connecting pipe (14).
3. The flange device with the pipeline dredging function according to claim 2, wherein the first air vent (17) is formed at the upper end of the housing, the opening and closing assembly comprises a rotary disc (19) rotatably arranged on the upper surface of the housing, a second air vent (18) is formed on the rotary disc (19), and the first air vent (17) and the second air vent (18) can be communicated by rotating the rotary disc (19).
4. The flange device with the pipeline dredging function according to claim 3, wherein a bracket (20) located above the rotating disc (19) is fixed on the housing, a speed reducing motor (21) is arranged on the bracket (20), and an output shaft of the speed reducing motor (21) is coaxially connected with the rotating disc (19).
5. The flange device with the pipeline dredging function as claimed in claim 4, wherein the edge of the rotating disc (19) extends downwards to form an annular rotating part, the upper surface of the shell is recessed downwards to form an annular groove, and the annular rotating part is rotatably clamped in the annular groove.
6. The pipe break-through flange device according to claim 6, wherein a ball (22) is rotatably disposed in the annular groove, and the ball (22) at least partially contacts the annular rotating portion.
7. The pipe break-through flange device according to claim 1, wherein the end of the cutting blade (4) is hinged in the cavity by a pin (3).
8. The flange device with the pipeline dredging function as claimed in claim 1, wherein an opening of the piston sleeve (5) extends inwards to form an annular pressing portion, one end of the spring (6) is connected with the piston (9), and the other end of the spring is connected with the annular pressing portion.
9. The pipe break-through flange device according to claim 1, wherein the connecting sleeve (2) connects the two pipes (1) by a screw assembly, so that a gap is left between the two pipes (1), and the cutting blade (4) can rotate into the pipe (1) through the gap.
10. The flange device with the pipeline dredging function as claimed in claim 1, wherein the number of the dredging assemblies is not less than 3, and the dredging assemblies are distributed at equal angles along the circumferential direction of the pipeline (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110974629.6A CN113668687A (en) | 2021-08-24 | 2021-08-24 | Flange device with pipeline dredging function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110974629.6A CN113668687A (en) | 2021-08-24 | 2021-08-24 | Flange device with pipeline dredging function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113668687A true CN113668687A (en) | 2021-11-19 |
Family
ID=78545690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110974629.6A Pending CN113668687A (en) | 2021-08-24 | 2021-08-24 | Flange device with pipeline dredging function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113668687A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635495A (en) * | 2022-03-29 | 2022-06-17 | 严斌 | Municipal drainage pipeline pull throughs |
| CN114717904A (en) * | 2022-03-22 | 2022-07-08 | 浙江恒炜建设集团有限公司 | Permeable road and paving method thereof |
| CN116620866A (en) * | 2023-07-25 | 2023-08-22 | 常州逸盛机电技术有限公司 | Pneumatic conveying mechanism with anti-blocking function |
| CN117427842A (en) * | 2023-12-21 | 2024-01-23 | 江苏昇昌家居新材料股份有限公司 | Automatic clearance formula hasp rubber coating device for floor complex |
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| CN212956783U (en) * | 2019-11-07 | 2021-04-13 | 史铁辉 | PVC pipeline with prevent blockking up function |
| CN213436098U (en) * | 2020-08-08 | 2021-06-15 | 河北华丰能源科技发展有限公司 | Pipeline cleaning device |
| CN113090860A (en) * | 2020-06-29 | 2021-07-09 | 王凤明 | Mechanical automatic control range constant-pressure dredging valve |
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| JPS60192816A (en) * | 1984-03-15 | 1985-10-01 | Taku Sanno | Rotary valve in engine |
| CN203248217U (en) * | 2013-04-23 | 2013-10-23 | 王为民 | Engine valve timing mechanism |
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|---|---|---|---|---|
| CN114717904A (en) * | 2022-03-22 | 2022-07-08 | 浙江恒炜建设集团有限公司 | Permeable road and paving method thereof |
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| CN117427842A (en) * | 2023-12-21 | 2024-01-23 | 江苏昇昌家居新材料股份有限公司 | Automatic clearance formula hasp rubber coating device for floor complex |
| CN117427842B (en) * | 2023-12-21 | 2024-03-15 | 江苏昇昌家居新材料股份有限公司 | Automatic clearance formula hasp rubber coating device for floor complex |
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Application publication date: 20211119 |
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| RJ01 | Rejection of invention patent application after publication |