CN113940339A - Bird repelling device for power transmission tower - Google Patents
Bird repelling device for power transmission tower Download PDFInfo
- Publication number
- CN113940339A CN113940339A CN202110973469.3A CN202110973469A CN113940339A CN 113940339 A CN113940339 A CN 113940339A CN 202110973469 A CN202110973469 A CN 202110973469A CN 113940339 A CN113940339 A CN 113940339A
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- China
- Prior art keywords
- rod
- sound
- box body
- guide rod
- transmission tower
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- 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
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 41
- 230000001846 repelling effect Effects 0.000 title claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 230000033001 locomotion Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 230000002940 repellent Effects 0.000 claims description 5
- 239000005871 repellent Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 230000001755 vocal effect Effects 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 46
- 229910052742 iron Inorganic materials 0.000 abstract description 23
- 238000000034 method Methods 0.000 description 6
- 230000001939 inductive effect Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000005770 birds nest Nutrition 0.000 description 1
- 244000240635 birds nest Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 235000005765 wild carrot Nutrition 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/16—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Birds (AREA)
- Engineering & Computer Science (AREA)
- Insects & Arthropods (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention discloses a bird repelling device for a power transmission iron tower, which comprises a sound source which is fixed on the power transmission iron tower and produces sound after being knocked, wherein a knocking part which knocks the sound source to expel birds is further arranged on the power transmission iron tower. According to the invention, the sound sources are arranged at the two ends of the box body, the driving guide rod moves in a reciprocating linear mode and knocks the two sound sources in a reciprocating mode, so that the sound sources emit continuous sharp noises to expel birds on or around the cable.
Description
Technical Field
The invention relates to the field of electric power, in particular to a bird repelling device for a power transmission iron tower.
Background
The power transmission iron tower is of a steel frame structure, is mostly built near a field power plant and a power distribution station, is an important facility of an electric power department, can make an overhead wire and play a role in protection and support, and the design, manufacture, installation, maintenance and quality detection of the power transmission iron tower are important guarantees for the operation and development of a modern power system.
In the working process of the power transmission iron tower, birds nest or stay on the power transmission iron tower, so that the power transmission iron tower is easy to break down or damage, and the normal power transmission work is influenced, thus urgent solution is needed.
Disclosure of Invention
In order to avoid and overcome the technical problems in the prior art, the invention provides a bird repelling device for a power transmission iron tower. The bird repelling device dispels birds on the power transmission iron tower and maintains normal power transmission work of the power transmission iron tower.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a bird repellent device for steel pylons, is including fixing the sound source of strikeing the back sound production on steel pylons, steel pylons is last still to be provided with reciprocal striking portion of strikeing the sound source in order to expel birds.
As a further scheme of the invention: the two sets of sound sources are arranged at two ends in the box body respectively and correspond to cables on two sides of the power transmission iron tower respectively, and the knocking portion comprises guide rods arranged between the two sound sources and a driving component for driving the guide rods to perform reciprocating linear motion so as to knock the two sound sources.
As a still further scheme of the invention: the driving assembly comprises a driving rod, the axis of the driving rod is parallel to that of the guide rod, the rod body of the driving rod is circumferentially provided with S-shaped guide grooves which are connected end to end, the guide rod is provided with a reversing rod, one end, far away from the guide rod, of the reversing rod is matched with the guide grooves in size and extends into the guide grooves, and the power source drives the driving rod to rotate and simultaneously drives the guide rod to do reciprocating linear motion along the axial direction through the matching of the guide grooves and the reversing rod so as to knock two sound sources; and a linear limiting part for limiting the guide rod to linearly move between the two sound sources is further arranged in the box body.
As a still further scheme of the invention: the linear limiting part is a positioning sleeve coaxially fixed on the rod body of the guide rod, a limiting groove is formed in the box body along the direction parallel to the guide rod, and a pulley capable of sliding along the length direction of the limiting groove is fixed on the positioning sleeve; and a hammer-head-shaped knocking rod is arranged at the rod end of the guide rod.
As a still further scheme of the invention: the reversing rod body is perpendicular to the guide rod, one end, far away from the guide rod, of the reversing rod is provided with a ball which is in idle running fit with the reversing rod, and the ball is matched with the guide groove in size and is in rolling fit with the guide groove.
As a still further scheme of the invention: the sound source comprises a metal spherical shell with a hole on the surface and a metal ball arranged in the metal spherical shell; the sound source is in hinged fit with the box body through the mounting rod, and a return spring for resetting after the sound source is impacted is arranged between the rod body of the mounting rod and the box body.
As a still further scheme of the invention: the box body is provided with a sound outlet corresponding to the sound source position for transmitting the knocking sound out of the box body, the sound outlet is provided with a bell mouth-shaped sound diffusion cover, and the opening direction of the sound diffusion cover is parallel to the cable direction of the power transmission iron tower.
As a still further scheme of the invention: the power source is a driving motor, a supporting shaft seat corresponding to the driving motor is arranged in the box body, and a motor shaft of the driving motor penetrates through the driving rod along the axial direction of the driving rod and then is in rotary fit with the supporting shaft seat.
As a still further scheme of the invention: a supporting plate is arranged in the box body, and a motor shaft of the guide rod and a motor shaft of the driving motor penetrate through the supporting plate and are in sliding fit with the supporting plate.
As a still further scheme of the invention: the box body is provided with a support frame, and the support frame is fixed on the power transmission iron tower through a fixing bolt; the solar charging panel that is used for charging for power module is provided with on the box, and power module is the power supply energy supply in the box.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the sound sources are arranged at the two ends of the box body, the driving guide rod moves in a reciprocating linear mode and knocks the two sound sources in a reciprocating mode, so that the sound sources emit continuous sharp noises to expel birds on or around the cable.
2. The driving rod is parallel to the guide rod, one end of the reversing rod fixed on the guide rod is matched and arranged in the guide groove of the driving rod, the guide rod is driven to do reciprocating linear motion between the two sound sources through the matching of the rod end of the reversing rod and the guide groove when the driving rod is driven to rotate by the power source, the two sound sources are continuously knocked, the whole driving mechanism cannot swing to a large extent while the sound sources are stably knocked at a certain frequency, the whole device occupies a small space, and the device is suitable for a narrow installation space on a power transmission iron tower.
3. According to the invention, the limiting groove is formed in the box body along the direction parallel to the guide rod, the positioning sleeve is coaxially fixed on the rod body of the guide rod, and after the pulley capable of sliding along the length direction of the limiting groove is arranged on the positioning sleeve, the rod body can drive the positioning sleeve and the pulley to linearly move along the direction of the limiting groove while the guide rod linearly reciprocates, so that the guide rod is linearly limited, the reciprocating motion process is kept stable, and the hammer head of the knocking rod at the end of the guide rod can improve the sound frequency during knocking.
4. The reversing rod body is vertical to the guide rod, so that the stability of the movement process is ensured, and the narrow installation space on the power transmission iron tower is utilized to the maximum extent; the ball bearing in idle running fit with the reversing rod is arranged at the rod end of the reversing rod, so that the ball bearing is in rolling fit with the guide groove, sliding friction is changed into rolling friction, friction between the ball bearing and the guide groove is reduced, the working efficiency is improved, the service life of the device is prolonged, and the replacement time of parts of the device is prolonged.
5. The sound outlets are arranged on two sides of the box body, the bell mouth-shaped sound diffusion covers are arranged at the sound outlets, the opening direction of the sound diffusion covers is parallel to the cable direction of the power transmission iron tower, sound is emitted to the cables on two sides of the power transmission iron tower along the direction parallel to the cable direction after a sound source in the box body is impacted and produces sound, when birds stand on the cables, sound waves are just transmitted to the ear parts of the birds, and the sound shells received by the birds are maximized so as to quickly drive the birds.
6. The sound source comprises a metal spherical shell and a metal ball arranged in the metal spherical shell, wherein the metal spherical shell vibrates to produce sound after being impacted by the guide rod, and the metal spherical shell deviates from the original position to enable the metal ball in the metal spherical shell to produce sound to collide with the metal spherical shell again to produce noise with another frequency; because the sound source passes through the articulated cooperation of installation pole and box, moves far away from the guide bar direction after being struck, reset spring applys a pulling force to the sound source this moment, makes it reply original position, and when the sound source replied original position, can take place the clash with the guide bar, under the unchangeable prerequisite of power that the power supply was applyed, improved the noise frequency.
7. The power source of the invention is a driving motor, and a motor shaft of the driving motor penetrates through the driving rod along the axial direction of the driving rod and then is in rotary fit with a supporting shaft seat in the box body, so that the stability of the motor shaft in the rotating process is ensured, and the supporting shaft seat can well bear the radial load of the motor shaft; the supporting plate in the box body can bear radial loads of the guide rod and the motor shaft, and the stability of the device in the reciprocating motion process is guaranteed.
8. The box body is fixed on the power transmission iron tower through the support frame, the solar power supply board is arranged at the top of the box body to supply power to the power source in the box body, other power supplies do not need to be introduced into the device, and the device is energy-saving and environment-friendly.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the inside of the case.
Fig. 3 is a schematic structural diagram of a metal ball.
In the figure:
1. a box body; 2. a reversing lever; 3. a drive rod; 4. a drive motor; 5. a power supply module;
6. a support plate; 7. a support shaft seat; 8. a guide bar; 9. a pulley; 10. a positioning sleeve;
11. a knock bar; 12. a sound source; 121. a metal spherical shell; 122. a metal ball;
13. a return spring; 14. a sound outlet; 15. an inductive probe;
16. a solar charging panel; 17. a sound amplification cover; 18. a support frame; 19. and (5) fixing the bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in an embodiment of the present invention, a bird repelling device for a power transmission tower includes a box body 1 fixed on the power transmission tower, the box body 1 is hollow, two groups of sound sources 12 are disposed at two ends in the box body 1, and the sound sources 12 respectively correspond to cables at two sides of the power transmission tower.
The two ends of the box body 1 are provided with sound outlets 14 corresponding to the positions of the sound sources 12, so that the sound of the sound sources 12 can be emitted out of the box body. A horn mouth-shaped sound amplifying cover 17 is arranged at the sound outlet 14, and the opening direction of the sound amplifying cover 17 is parallel to the cable direction of the power transmission iron tower.
Two groups of sound sources 12 are positioned on the same horizontal plane, a guide rod 8 positioned between the two sound sources 12 is arranged in the box body 1, and a certain distance exists between the two ends of the guide rod 8 and the sound sources 12.
A reversing rod 2 which is perpendicular to the guide rod 8 is fixed in the middle of the rod body of the guide rod 8, and a ball which is in idle running fit with the reversing rod 2 is arranged at one end, far away from the reversing rod 2, of the reversing rod 2.
The box body 1 is also internally provided with a driving rod 3 which is arranged in parallel with the reversing rod 2 and is driven to rotate by a driving motor 4, the rod body of the driving rod 3 is circumferentially provided with an S-shaped guide groove which is connected in a tail way, the rod end of the reversing rod 2 extends into the guide groove to enable the ball to roll along the guide groove, and the size of the ball is matched with that of the guide groove.
The motor shaft of the driving motor 4 is matched with the supporting shaft seat 7 in the box body 1 in a rotating way after penetrating through the driving rod 3 along the axial direction of the driving rod 3. The support shaft seat 7 is arranged coaxially with a motor shaft of the driving motor 4, and supports the motor shaft. The driving rod 3 and the motor shaft can be fixed by welding or connected by a key. The driving motor 4 can be replaced by other power sources for driving the driving rod 3 to rotate.
The body of the guide rod 8 is coaxially fixed with a positioning sleeve 10, and the positioning sleeve 10 is symmetrically arranged at two sides of the reversing rod 2. Pulleys are uniformly arranged at the upper end and the lower end of the positioning sleeve 10, limiting grooves which are positioned at the upper end and the lower end of the guide rod 8 are formed in the box body 1 along the direction parallel to the guide rod 8, the pulleys at the upper end and the lower end of the positioning sleeve 10 can slide along the limiting grooves, the axial positioning of the guide rod 8 is realized, and the guide rod 8 is limited to reciprocate between the two sound sources 12.
The two rod ends of the reversing rod 2 are provided with hammer-head-shaped knocking rods 11, so that knocking and sounding are facilitated.
When the driving rod 3 rotates, the ball rolls along the guide groove of the rod body of the driving rod 3, and at the moment, the reversing rod 2 drives the guide rod 8 to do linear motion along the axial direction, so that two sound sources 12 are impacted in a reciprocating mode, and birds are repelled by sounding.
The sound source 12 is composed of a metal spherical shell 121 with a hole on the surface and a metal ball 122 disposed in the metal spherical shell 121. The metal spherical shell 121 is fixed with a mounting rod, one end of the mounting rod, which is far away from the metal spherical shell 121, is hinged with the box body 1, and a return spring 13 is arranged between the mounting rod and the box body 1, so that the sound source 12 is quickly reset after being impacted.
After the knocking rod 11 impacts the metal spherical shell 121, the metal spherical shell 121 vibrates to generate high-frequency noise, and the metal spherical shell 121 is displaced after being impacted, so that the metal balls 122 in the metal spherical shell 121 collide with the metal spherical shell 121 again to generate noise with another frequency, and birds standing on the cable are repelled under the dual noise.
In order to improve the stability of the process of reciprocating impact on the sound source 12, supporting plates 6 arranged along the vertical direction are arranged on two sides of the driving rod 3 in the box body 1, and the guide rod 6 and the motor shaft penetrate through the supporting plates 6 and are in rotary sliding fit with the supporting plates 6 to keep the stability of the box body in working.
The whole box body 1 is fixed on a power transmission iron tower through a support frame 18, and the support frame 18 and the power transmission iron tower are fixed through a fixing bolt 19. A solar charging panel 16 is laid above the box body 1, and the solar charging panel 16 converts light energy into electric energy and stores the electric energy in the power module 5 in the box body 1. 1 top of box still is provided with inductive probe 15 that is used for responding to birds, and inductive probe 15 senses and exists birds back on the cable, and power module 5 is the power supply of driving motor 4, and whole device begins work, strikes 12 vocalizations of sound source in order to expel birds.
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 the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a bird repellent device for steel pylons, its characterized in that, is including fixing on steel pylons and receive sound source (12) of striking back vocal, steel pylons is last still to be provided with reciprocal striking sound source (12) in order to expel the striking portion of birds.
2. A bird repelling device for an electric power transmission tower according to claim 1, wherein the sound sources (12) are arranged in two groups and are respectively arranged at two ends in the box body (1) to respectively correspond to cables at two sides of the electric power transmission tower, and the knocking part comprises a guide rod (8) arranged between the two sound sources (12) and a driving component for driving the guide rod (8) to perform reciprocating linear motion so as to knock the two sound sources (12).
3. The bird repelling device for the transmission tower according to claim 2, wherein the driving assembly comprises a driving rod (3) of which the axis is parallel to a guide rod (8), an S-shaped guide groove which is connected end to end is formed in the rod body of the driving rod (3) along the circumferential direction, a reversing rod (2) is arranged on the guide rod (8), one end, far away from the guide rod (8), of the reversing rod (2) is matched with the guide groove in size and extends into the guide groove, and the guide rod (8) is driven to reciprocate linearly along the axial direction by the matching of the guide groove and the reversing rod (2) while the driving rod (3) is driven to rotate by a power source so as to knock the two sound sources (12); the box body (1) is also internally provided with a linear limiting part for limiting the guide rod (8) to linearly move between the two sound sources (12).
4. A bird repellent device for an electricity transmission tower according to claim 3, wherein the linear limiting part is a positioning sleeve (10) coaxially fixed on the rod body of the guide rod (8), a limiting groove is formed in the box body (1) along the direction parallel to the guide rod (8), and a pulley (9) capable of sliding along the length direction of the limiting groove is fixed on the positioning sleeve (10); and a hammer-head-shaped knocking rod (11) is arranged at the rod end of the guide rod (8).
5. A bird repellent device for an electric transmission tower according to claim 3, wherein the rod body of the reversing rod (2) is perpendicular to the guide rod (8), and a ball which is in idle running fit with the reversing rod (2) is arranged at one end of the reversing rod (2) far away from the guide rod (8) and is matched with the guide groove in size and in rolling fit with the guide groove.
6. A bird repelling device for an electric pylon according to any one of claims 2 to 5 wherein the sound source (12) comprises a metal spherical shell (121) with holes on the surface and metal balls (122) arranged in the metal spherical shell (121); sound source (12) are through the articulated cooperation of installation pole and box (1), be provided with between the pole body of installation pole and box (1) and supply reset spring (13) that sound source (12) reseed after striking.
7. A bird repelling device for a transmission tower according to any one of claims 2 to 5, wherein a sound outlet (14) corresponding to a sound source (12) is formed in the box body (1) and used for transmitting knocking sound out of the box body (1), a bell-mouth-shaped sound diffusion cover (17) is arranged at the sound outlet (14), and the opening direction of the sound diffusion cover (17) is parallel to the cable direction of the transmission tower.
8. A bird repelling device for an electric transmission tower according to any one of claims 3 to 5, wherein the power source is a driving motor (4), a supporting shaft seat (7) corresponding to the driving motor (4) is arranged in the box body (1), and a motor shaft of the driving motor (4) penetrates through the driving rod (3) along the axial direction of the driving rod (3) and then is in rotating fit with the supporting shaft seat (7).
9. A bird repellent device for an electric transmission tower according to claim 8, characterized in that a support plate (6) is arranged in the box body (1), and the guide rod (8) and a motor shaft of the driving motor (4) both penetrate through the support plate (6) and are in sliding fit with the support plate (6).
10. A bird repelling device for an electric transmission tower according to any one of claims 2 to 5, wherein a support frame (18) is arranged on the box body (1), and the support frame (18) is fixed on the electric transmission tower through a fixing bolt (19); the solar energy charging device is characterized in that a solar charging panel (16) used for charging the power module (5) is arranged on the box body (1), and the power module (5) supplies energy for a power source in the box body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973469.3A CN113940339A (en) | 2021-08-24 | 2021-08-24 | Bird repelling device for power transmission tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973469.3A CN113940339A (en) | 2021-08-24 | 2021-08-24 | Bird repelling device for power transmission tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113940339A true CN113940339A (en) | 2022-01-18 |
Family
ID=79327502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110973469.3A Pending CN113940339A (en) | 2021-08-24 | 2021-08-24 | Bird repelling device for power transmission tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113940339A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209491138U (en) * | 2018-11-08 | 2019-10-15 | 王江 | A kind of building form high effect dust cleaner |
| CN209768722U (en) * | 2019-02-25 | 2019-12-13 | 杨炯 | Energy-saving bird repellent device for communication tower |
| CN111528213A (en) * | 2020-06-08 | 2020-08-14 | 喻有强 | Wisdom agricultural wind kinetic energy is from swaing type farmland bird repellent device |
| CN211861618U (en) * | 2020-04-03 | 2020-11-06 | 衡阳师范学院 | Electric pole bird repellent device |
| CN212130105U (en) * | 2019-12-23 | 2020-12-11 | 砀山泰莱电气设备有限公司 | Electric power iron tower with bird repelling function |
| CN112588708A (en) * | 2020-11-26 | 2021-04-02 | 安徽铜都流体科技股份有限公司 | Anti-blocking mud valve for shield machine |
-
2021
- 2021-08-24 CN CN202110973469.3A patent/CN113940339A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209491138U (en) * | 2018-11-08 | 2019-10-15 | 王江 | A kind of building form high effect dust cleaner |
| CN209768722U (en) * | 2019-02-25 | 2019-12-13 | 杨炯 | Energy-saving bird repellent device for communication tower |
| CN212130105U (en) * | 2019-12-23 | 2020-12-11 | 砀山泰莱电气设备有限公司 | Electric power iron tower with bird repelling function |
| CN211861618U (en) * | 2020-04-03 | 2020-11-06 | 衡阳师范学院 | Electric pole bird repellent device |
| CN111528213A (en) * | 2020-06-08 | 2020-08-14 | 喻有强 | Wisdom agricultural wind kinetic energy is from swaing type farmland bird repellent device |
| CN112588708A (en) * | 2020-11-26 | 2021-04-02 | 安徽铜都流体科技股份有限公司 | Anti-blocking mud valve for shield machine |
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Application publication date: 20220118 |