CN116328460B - Road construction earthwork excavation raise dust suppression equipment - Google Patents
Road construction earthwork excavation raise dust suppression equipment Download PDFInfo
- Publication number
- CN116328460B CN116328460B CN202310332569.7A CN202310332569A CN116328460B CN 116328460 B CN116328460 B CN 116328460B CN 202310332569 A CN202310332569 A CN 202310332569A CN 116328460 B CN116328460 B CN 116328460B
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- Prior art keywords
- wall
- support
- fixedly connected
- gear
- sealing plate
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
- B05B15/62—Arrangements for supporting spraying apparatus, e.g. suction cups
- B05B15/622—Arrangements for supporting spraying apparatus, e.g. suction cups ground-penetrating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/025—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining open after return of the normal pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses dust suppression equipment for road construction earthwork excavation, and relates to the technical field of construction sites. This road construction earthwork excavation raise dust suppression equipment, which comprises a bracket, the upside fixedly connected with riser of support, the upside fixedly connected with installation head of riser, the overhead mounting hole of having seted up of installation, the inside fixedly connected with atomizer of mounting hole, atomizer's input and atomizer's output will install the inside of head and the outside intercommunication setting of installation head, the left side of riser and the right side of riser fixedly connected with inlet tube, outlet pipe respectively, the inside of riser is through inlet tube, outlet pipe and the outside intercommunication setting of riser respectively. This road construction earth excavation raise dust suppression equipment through being provided with fixed establishment, makes this device can fix and demolish in predetermined position fast, reaches quick fixed purpose, and then can the quick adjustment dust fall position.
Description
Technical Field
The invention relates to the technical field of construction site construction, in particular to dust suppression equipment for earth excavation in road construction.
Background
At present, dust on construction sites flies upward, particularly when earthwork is excavated, the dust is increased, serious environmental pollution is easily caused, great harm is also caused to human health, even safety accidents can be caused, at present, conventional construction pavement dust fall generally adopts a self-made sprinkling trolley, dust is reduced through sprinkling, however, the sprinkling trolley needs manual pushing and sprinkling, the efficiency is low, the dust reducing effect is poor, a large amount of dust can be sucked in during manual pushing, great harm is caused to human health, the existing vertex spray equipment has the defects of troublesome fixation, time-consuming disassembly, difficult installation and the like, and further the dust reducing area cannot be flexibly adjusted according to the earthwork excavation range, so that a device is needed to achieve the purpose of conveniently adjusting the dust reducing area according to the earthwork excavation range.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides dust suppression equipment for road construction earthwork excavation, which achieves the purpose of conveniently adjusting a dust fall area according to the earthwork excavation range.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a road construction earthwork excavation raise dust suppression equipment, includes the support, the upside fixedly connected with riser of support, the upside fixedly connected with installation head of riser, the overhead mounting hole of seting up of installation, the inside fixedly connected with atomizer of mounting hole, the inside and the outside intercommunication setting of installation head of atomizer's input and atomizer's output will install the head, the left side of riser and the right side of riser fixedly connected with inlet tube, outlet pipe respectively, the inside of riser is through inlet tube, outlet pipe and the outside intercommunication setting of riser respectively, the lower surface fixedly connected with bottom plate of support, the downside of support is provided with drainage mechanism, the outer wall of support is provided with fixed establishment;
the middle part of the bracket and the lower side of the vertical pipe are both provided with openings, the drainage mechanism is arranged in the openings on the bracket and the vertical pipe, the drainage mechanism comprises a connecting component and a limiting block on the connecting component, the upper surface of the limiting block is in sliding connection with the lower surface of the bracket, and the limiting block can horizontally slide on the lower side of the bracket;
the fixing mechanism comprises a transmission assembly and a fixing nail on the transmission assembly, wherein the fixing nail can be lifted and rotated in the lifting process.
Preferably, the connecting assembly comprises a spring, the upper end of the spring is fixedly connected with the inner wall of the vertical pipe, the lower end of the spring is fixedly connected with a sealing plate, and the inner wall of the opening on the support is fixedly connected with a sealing strip.
Preferably, the connecting assembly further comprises a fixing strip, the outer wall of the fixing strip is fixedly connected with the lower surface of the support, the middle part of the fixing strip is slidably connected with a push rod, a sliding groove is formed in the middle of the push rod, the fixing strip is located in the sliding groove, the right end of the push rod is in contact with the lower surface of the sealing plate, the left end of the push rod is in contact with the outer wall of the limiting block, an elastic sheet is fixedly connected to the upper side of the outer wall of the limiting block, and the other end of the elastic sheet is fixedly connected with the outer wall of the support.
Preferably, the shrouding extends to support upper shed's inside, just the outer wall of shrouding and the inner wall of support do not contact, and the shrouding is located the upside of sealing strip, set up flutedly on the shrouding, the recess is located the upside of sealing strip, the inner wall shape of recess is corresponding the setting with the outer wall shape of sealing strip on the shrouding.
Preferably, the transmission assembly comprises a fixing nail, the lower extreme of fixing nail runs through the support and extends to the downside of support, the outer wall of fixing nail and the inner wall threaded connection of support, the upper end of fixing nail is located the top of support, the upside outer wall contact of fixing nail has first gear, the lower surface of first gear passes through the bearing rotation with the upper surface of support and is connected, the outer wall meshing of first gear has the second gear, the outer wall downside of second gear passes through the bearing and rotates with the outer wall of support and be connected, the outer wall of second gear is connected with two spanners through ratchet, two spanners are located the upper portion of second gear lateral wall and the lower part of second gear lateral wall respectively.
Preferably, the ratchet structure at the connection part of the wrench and the outer wall of the second gear on the upper side can support the direction of driving the second gear to rotate, and the ratchet structure at the connection part of the wrench and the outer wall of the second gear on the lower side can support the direction of driving the second gear to rotate.
The invention provides dust suppression equipment for road construction earth excavation. The beneficial effects are as follows:
1. this road construction earthwork excavation raise dust suppression equipment through being provided with structures such as support, riser, inlet tube, outlet pipe, makes this device can place in the preset position fast, reaches the purpose that can conveniently follow the excavation position and carry out the dust fall.
2. This road construction earth excavation raise dust suppression equipment through being provided with fixed establishment, makes this device can fix and demolish in predetermined position fast, reaches quick fixed purpose, and then can the quick adjustment dust fall position.
3. This road construction earth excavation raise dust suppression equipment through being provided with spring, shrouding, sealing strip, makes this device can empty the inside water that persists of pair of fast, reaches the purpose of being convenient for demolish.
4. This road construction earthwork excavation raise dust suppression equipment through being provided with structures such as stopper, push rod, makes this device can fix the staple when using, reaches better fixed effect.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the internal structure of the riser of the present invention;
FIG. 3 is a schematic view of the underside structure of the bracket of the present invention;
FIG. 4 is a schematic cross-sectional view of a fixing mechanism according to the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 2A according to the present invention;
FIG. 6 is an enlarged schematic view of the structure of FIG. 4A according to the present invention;
fig. 7 is a schematic perspective view of the staple of the present invention.
In the figure: 1 bracket, 2 vertical pipe, 3 installation head, 4 atomizer, 5 inlet tube, 6 outlet pipe, 7 bottom plate, 8 drainage mechanism, 9 fixed establishment, 801 spring, 802 shrouding, 803 fixed strip, 804 push rod, 805 stopper, 806 shell fragment, 807 sealing strip, 901 staple, 902 first gear, 903 second gear, 904 spanner.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a road construction earthwork excavation raise dust suppression equipment, which comprises a bracket 1, the upside fixedly connected with riser 2 of support 1, the upside fixedly connected with installation head 3 of riser 2, the mounting hole has been seted up on the installation head 3, the inside fixedly connected with atomizer 4 of mounting hole, the inside and the outside intercommunication setting of installation head 3 of the input of atomizer 4 and atomizer 4's output will install the inside of head 3, the left side of riser 2 and the right side of riser 2 respectively fixedly connected with inlet tube 5, outlet pipe 6, the inside of riser 2 is respectively through inlet tube 5, outlet pipe 6 and riser 2 outside intercommunication setting, the lower surface fixedly connected with bottom plate 7 of support 1, the downside of support 1 is provided with drainage mechanism 8, the outer wall of support 1 is provided with fixed establishment 9;
the middle part of the bracket 1 and the lower side of the vertical pipe 2 are both provided with openings, the drainage mechanism 8 is arranged in the openings on the bracket 1 and the vertical pipe 2, the drainage mechanism 8 comprises a connecting component and a limiting block 805 on the connecting component, the upper surface of the limiting block 805 is in sliding connection with the lower surface of the bracket 1, and the limiting block 805 can horizontally slide on the lower side of the bracket 1;
the fixing mechanism 9 comprises a transmission assembly and a fixing nail 901 on the transmission assembly, the fixing nail 901 can be lifted, and the fixing nail 901 rotates in the lifting process;
when the device is used, a plurality of devices are respectively placed on the periphery of an earthwork excavation range, then the water inlet pipe 5 and the water outlet pipe 6 adjacent to the two devices are connected through water pipes, the water outlet pipe 6 of the last device is plugged, water is supplied to the inside of the vertical pipe 2 through the water inlet pipe 5 of the first device by the high-pressure pumping device, water flow is conducted to the upper side of the inside of the vertical pipe 2, high-pressure water flow is sprayed out after being atomized by the atomizing nozzle 4, and the purpose of dust fall near the earthwork excavation range is achieved.
The connecting assembly comprises a spring 801, the upper end of the spring 801 is fixedly connected with the inner wall of the vertical pipe 2, the lower end of the spring 801 is fixedly connected with a sealing plate 802, and the inner wall of an opening on the bracket 1 is fixedly connected with a sealing strip 807;
after the inside of the vertical pipe 2 is filled with high-pressure water flow, the sealing plate 802 moves downwards due to the driving of the water flow and the pressure, and then the spring 801 is pulled to deform, so that the lower side of the sealing plate 802 presses the upper side of the sealing strip 807, the sealing plate 802 seals the lower side of the bracket 1, and then the water flow is sprayed upwards normally, after the use is stopped, the pump stops pressing the inside of the vertical pipe 2, the spring 801 drives the sealing plate 802 to rebound upwards to reset, the water in the vertical pipe 2 leaks downwards through the opening on the bracket 1, and the purposes of automatically evacuating the water stored in the vertical pipe and accelerating the disassembly efficiency are achieved.
The transmission assembly comprises a fixed nail 901, the lower end of the fixed nail 901 penetrates through a support 1 and extends to the lower side of the support 1, the outer wall of the fixed nail 901 is in threaded connection with the inner wall of the support 1, the upper end of the fixed nail 901 is located above the support 1, the outer wall of the upper side of the fixed nail 901 is contacted with a first gear 902, the lower surface of the first gear 902 is rotationally connected with the upper surface of the support 1 through a bearing, the outer wall of the first gear 902 is meshed with a second gear 903, the lower side of the outer wall of the second gear 903 is rotationally connected with the outer wall of the support 1 through a bearing, two spanners 904 are connected with the outer wall of the second gear 903 through a ratchet structure, the two spanners 904 are respectively located on the upper portion of the side wall of the second gear 903 and the lower portion of the side wall of the second gear 903, and the ratchet structure at the junction of the outer wall of the spanners 904 and the second gear 903 on the upper side can support driving the second gear 903 to rotate in the opposite direction with the ratchet structure at the junction of the outer wall of the second gear 903 and driving the second gear 903.
After the device is placed at a preset position, the wrench 904 can drive the second gear 903 to rotate only by stepping the bottom plate 7 by foot and then rotating the wrench 904, so that the second gear 903 drives the first gear 902 to rotate, and the first gear 902 drives the fixing nail 901 to rotate, and finally the fixing nail 901 is downwards inserted into the bottom surface due to the threaded connection with the inner wall of the bracket 1, so that the purpose of fixing the vertical pipe 2 is achieved.
The connecting assembly further comprises a fixing strip 803, the outer wall of the fixing strip 803 is fixedly connected with the lower surface of the support 1, the middle of the fixing strip 803 is slidably connected with a push rod 804, a chute is formed in the middle of the push rod 804, the fixing strip 803 is located in the chute, the right end of the push rod 804 is in contact with the lower surface of the sealing plate 802, the left end of the push rod 804 is in contact with the outer wall of the limiting block 805, an elastic sheet 806 is fixedly connected to the upper side of the outer wall of the limiting block 805, the other end of the elastic sheet 806 is fixedly connected with the outer wall of the support 1, the sealing plate 802 extends to the inside of the upper opening of the support 1, the outer wall of the sealing plate 802 is not in contact with the inner wall of the support 1, the sealing plate 802 is located on the upper side of the sealing strip 807, a groove is formed in the sealing plate 802, and the shape of the inner wall of the groove is correspondingly arranged with the shape of the outer wall of the sealing strip 807.
When the sealing plate 802 moves downwards, the sealing plate 802 pushes the push rod 804 downwards, so that the push rod 804 pushes the limiting block 805 to be in contact with the outer wall of the fixed nail 901, the lower limiting block 805 can limit the fixed nail 901 when spraying water on the upper side of the vertical pipe 2, the fixed nail 901 cannot rotate and loosen, the effect of providing stability for the device is achieved, and when the sealing plate 802 moves upwards, the limiting block 805 is reset due to the elastic force of the elastic sheet 806, so that the purpose of convenient disassembly is achieved;
and the water flow in the vertical pipe 2 can flow downwards after the sealing plate 802 moves upwards, so that the soil rainwater on the lower side of the bracket 1 becomes soft, the fixed nails 901 are pulled out of the bottom surface by the rotary wrench 904 conveniently, and the purpose of convenient disassembly is achieved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The utility model provides a road construction earth excavation raise dust suppression equipment, includes support (1), the upside fixedly connected with riser (2) of support (1), its characterized in that: the upper side of the vertical pipe (2) is fixedly connected with a mounting head (3), the mounting head (3) is provided with a mounting hole, the inside of the mounting hole is fixedly connected with an atomizing nozzle (4), the input end of the atomizing nozzle (4) and the output end of the atomizing nozzle (4) are communicated with the inside of the mounting head (3) and the outside of the mounting head (3), the left side of the vertical pipe (2) and the right side of the vertical pipe (2) are respectively and fixedly connected with a water inlet pipe (5) and a water outlet pipe (6), the inside of the vertical pipe (2) is respectively communicated with the outer side of the vertical pipe (2) through the water inlet pipe (5) and the water outlet pipe (6), the lower surface of the support (1) is fixedly connected with a bottom plate (7), the lower side of the support (1) is provided with a water draining mechanism (8), and the outer wall of the support (1) is provided with a fixing mechanism (9);
the middle part of the bracket (1) and the lower side of the vertical pipe (2) are both provided with openings, the drainage mechanism (8) is arranged in the openings on the bracket (1) and the vertical pipe (2), the drainage mechanism (8) comprises a connecting component and a limiting block (805) on the connecting component, the upper surface of the limiting block (805) is in sliding connection with the lower surface of the bracket (1), and the limiting block (805) can horizontally slide on the lower side of the bracket (1);
the fixing mechanism (9) comprises a transmission assembly and a fixing nail (901) on the transmission assembly, wherein the fixing nail (901) can be lifted, the fixing nail (901) rotates in the lifting process, the lower end of the fixing nail (901) penetrates through the support (1) and extends to the lower side of the support (1), and the outer wall of the fixing nail (901) is in threaded connection with the inner wall of the support (1);
the connecting assembly comprises a spring (801), the upper end of the spring (801) is fixedly connected with the inner wall of the vertical pipe (2), the lower end of the spring (801) is fixedly connected with a sealing plate (802), and the inner wall of an opening on the bracket (1) is fixedly connected with a sealing strip (807);
the connecting assembly further comprises a fixing strip (803), the outer wall of the fixing strip (803) is fixedly connected with the lower surface of the support (1), the middle part of the fixing strip (803) is slidably connected with a push rod (804), a sliding groove is formed in the middle part of the push rod (804), the fixing strip (803) is positioned in the sliding groove, the right end of the push rod (804) is in contact with the lower surface of the sealing plate (802), the left end of the push rod (804) is in contact with the outer wall of the limiting block (805), an elastic sheet (806) is fixedly connected to the upper side of the outer wall of the limiting block (805), and the other end of the elastic sheet (806) is fixedly connected with the outer wall of the support (1);
when the sealing plate (802) moves downwards, the sealing plate (802) pushes the push rod (804) downwards, the push rod (804) pushes the limiting block (805) to be in contact with the outer wall of the fixed nail (901), and when the sealing plate (802) moves upwards, the limiting block (805) is reset through the elastic force of the elastic sheet (806).
2. The road construction earth excavation dust suppression apparatus as set forth in claim 1, wherein: the sealing plate (802) extends to the inside of the upper opening of the support (1), the outer wall of the sealing plate (802) is not contacted with the inner wall of the support (1), the sealing plate (802) is located on the upper side of the sealing strip (807), a groove is formed in the sealing plate (802), the groove is located on the upper side of the sealing strip (807), and the shape of the inner wall of the groove in the sealing plate (802) corresponds to the shape of the outer wall of the sealing strip (807).
3. A road construction earth excavation dust suppression apparatus as set forth in claim 2, wherein: the upper end of staple (901) is located the top of support (1), the upside outer wall contact of staple (901) has first gear (902), the lower surface of first gear (902) is connected through the bearing rotation with the upper surface of support (1), the outer wall meshing of first gear (902) has second gear (903), the outer wall downside of second gear (903) is connected through the bearing rotation with the outer wall of support (1), the outer wall of second gear (903) is connected with two spanners (904) through ratchet, two spanners (904) are located the upper portion of second gear (903) lateral wall and the lower part of second gear (903) lateral wall respectively.
4. A road construction earth excavation dust suppression apparatus as set forth in claim 3, wherein: the ratchet structure at the connection part of the wrench (904) at the upper side and the outer wall of the second gear (903) can support and drive the second gear (903) to rotate, and the ratchet structure at the connection part of the wrench (904) at the lower side and the outer wall of the second gear (903) can support and drive the second gear (903) to rotate in the opposite direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310332569.7A CN116328460B (en) | 2023-03-31 | 2023-03-31 | Road construction earthwork excavation raise dust suppression equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310332569.7A CN116328460B (en) | 2023-03-31 | 2023-03-31 | Road construction earthwork excavation raise dust suppression equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116328460A CN116328460A (en) | 2023-06-27 |
| CN116328460B true CN116328460B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310332569.7A Active CN116328460B (en) | 2023-03-31 | 2023-03-31 | Road construction earthwork excavation raise dust suppression equipment |
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| Country | Link |
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| CN (1) | CN116328460B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5297581A (en) * | 1991-07-25 | 1994-03-29 | Underpressure Engineering Co. Limited | Pipeline plugger |
| CN103016799A (en) * | 2011-09-28 | 2013-04-03 | 上海靓消消防装备有限公司 | Overflow valve |
| KR101554924B1 (en) * | 2015-04-01 | 2015-09-22 | 씨제이대한통운 (주) | Membrane unit for immersion type membrane separation system |
| CN206530745U (en) * | 2016-12-12 | 2017-09-29 | 扬州大学 | A kind of anti-interference spring loaded safety valve of large-scale irrigation water delivery pipe network noresidue damping erosion control |
-
2023
- 2023-03-31 CN CN202310332569.7A patent/CN116328460B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5297581A (en) * | 1991-07-25 | 1994-03-29 | Underpressure Engineering Co. Limited | Pipeline plugger |
| CN103016799A (en) * | 2011-09-28 | 2013-04-03 | 上海靓消消防装备有限公司 | Overflow valve |
| KR101554924B1 (en) * | 2015-04-01 | 2015-09-22 | 씨제이대한통운 (주) | Membrane unit for immersion type membrane separation system |
| CN206530745U (en) * | 2016-12-12 | 2017-09-29 | 扬州大学 | A kind of anti-interference spring loaded safety valve of large-scale irrigation water delivery pipe network noresidue damping erosion control |
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| Publication number | Publication date |
|---|---|
| CN116328460A (en) | 2023-06-27 |
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