CN111620201A - But self-cleaning fire hose's winding and unwinding devices - Google Patents
But self-cleaning fire hose's winding and unwinding devices Download PDFInfo
- Publication number
- CN111620201A CN111620201A CN202010445319.0A CN202010445319A CN111620201A CN 111620201 A CN111620201 A CN 111620201A CN 202010445319 A CN202010445319 A CN 202010445319A CN 111620201 A CN111620201 A CN 111620201A
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- Prior art keywords
- water pipe
- magnet
- cleaning
- winding box
- winding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
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- 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
- B08B9/023—Cleaning the external surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4402—Guiding arrangements to control paying-out and re-storing of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4478—Constructional details relating to handling of fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/33—Hollow or hose-like material
Abstract
The invention relates to the technical field of fire fighting equipment and discloses a winding and unwinding device capable of automatically cleaning a fire-fighting water pipe, which comprises a winding box, wherein the winding box comprises a sliding groove, a guide groove, a rotating groove and an inclined groove, a first magnet is arranged at the rear end of an upper rotating shaft, a second magnet is connected inside the winding box, a metal ball is arranged at the right end of the second magnet, a metal sheet is arranged at the right end of the metal ball, a magnet is connected inside a cleaning device, and a coil is arranged on the upper side of the magnet. Promote the second magnetic path downstream through first magnetic path, the second magnetic path drives metal ball and the sheetmetal contact on it, the magnetic field that the coil produced promotes the magnet downstream, the magnet drives drive arrangement, pivot and cleaning head downstream, drive arrangement drives the cleaning head and washs the water pipe, current fire hose belt cleaning device has been solved to this structure possesses that the cleaning efficiency is low, fire fighter working strength is big, the water pipe washs not comprehensive and can not carry out the abluent problem of water pipe automatically.
Description
Technical Field
The invention relates to the technical field of fire fighting equipment, in particular to a winding and unwinding device capable of automatically cleaning a fire fighting water pipe.
Background
Fire fighting works are a general term for the work of preventing and extinguishing fires. The combined policy of prevention and elimination in fire-fighting work in China is a practical summary of people struggling with fire for many years and is loaded into the fire-fighting Law of the people's republic of China, which is passed by the Committee of general affairs of the people's representative nationwide. The fire fighting work is a work with strong sociality, and fire fighting management should penetrate into all fields of human production and life, so that the sociality of the fire fighting work is determined; fire safety management relates to all walks of life, even thousands of households. Fire fighting works often use fire hoses for flexible water pipes of fire hydrant systems.
Present fire hose is after finishing using, fire hose fight on the surface has a large amount of silt, thereby need wash it, generally all adopt the handheld brush of people to go on, it still needs the manual fire hose of twining into a roll again to wash after accomplishing, not only work efficiency is low when the handheld brush of people washs, working strength is big, it is not comprehensive to wash in addition, in addition the people still need carry out the water pipe winding after wasing, need spend a large amount of times, we have proposed a winding and unwinding devices that can self-cleaning fire hose in order to solve this problem.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the winding and unwinding device capable of automatically cleaning the fire-fighting water pipe, which has the advantages of high cleaning efficiency, reduced working strength, comprehensive cleaning and automatic water pipe cleaning, and solves the problems that the existing fire-fighting water pipe cleaning device has low cleaning efficiency, high working strength of fire fighters, incomplete water pipe cleaning and incapability of automatically cleaning the water pipe.
(II) technical scheme
In order to achieve the purposes of high cleaning efficiency, reduced working strength, complete cleaning and automatic water pipe cleaning, the invention provides the following technical scheme: a winding and unwinding device capable of automatically cleaning a fire hose comprises a winding box, sliding grooves are formed in the left side and the right side of the front portion of the winding box, a guide groove is formed in the left side of the inner lower surface of the winding box, a rotating groove is formed in the right side of the inner lower surface of the winding box, an inclined groove is formed in the left side of the inner rear surface of the winding box, a sliding plate is connected in the sliding groove in the front side of the winding box, a first support frame is connected in the guide groove in a sliding mode and on the inner side of the winding box, symmetrical rotating shafts are arranged on the upper side of the first support frame in the inclined groove, a first magnetic block is arranged at the rear end of the upper rotating shaft, a symmetrical rotating roller is arranged on the upper side of the first support frame, an elastic layer is arranged on the outer side of the rotating roller, a second magnetic block is connected in the winding box in a sliding mode and on the lower side of the, the lower extreme fixedly connected with first spring of second magnetic path, the inside of rolling case just is being rotated the inslot rotation and is being connected with the second support frame, the upper portion of second support frame is rotated and is connected with the rolling dish, the outside winding of rolling dish has the water pipe, the inside middle side fixedly connected with water tank of rolling case, the middle part of water tank is provided with the filter plate, all be provided with belt cleaning device directly over the inside of water tank, belt cleaning device's inside left side fixedly connected with water pipe, belt cleaning device's the equal sliding connection in inside has the magnet, the upside of magnet just is provided with the coil in belt cleaning device, the lower extreme fixedly connected with drive arrangement of magnet, drive arrangement's lower extreme rotates and is connected with the pivot, the outside of pivot is provided with the second spring.
Preferably, the guide groove is a closed elliptical arc-shaped groove, so that the first support frame drives the rotating roller to swing left and right along with the water pipe, and the rotating roller corresponds to the inclined groove when being folded and unfolded.
Preferably, the distance between the upper and lower inclined grooves is gradually reduced from left to right, so that the pressure between the rotating roller and the water pipe is smaller when the water pipe is used, and the water pipe is convenient to pull out; when the water pipe is retracted, the pressure between the rotating roller and the water pipe is higher, so that redundant water in the water pipe can be conveniently extruded.
Preferably, the magnetic pole at the lower end of the first magnetic block is in the same direction as the magnetic pole at the upper part of the second magnetic block, so that the first magnetic block is ensured to push the second magnetic block to move downwards, and the metal ball on the second magnetic block is further ensured to be in contact with the metal sheet.
Preferably, the spray head at the lower part of the water pipe is circular, so that the water sprayed by the spray head at the lower part of the water pipe is ensured to correspond to the width of the water pipe.
Preferably, the upper and lower water pipes are connected with the water tank, and the water pump is arranged in the water tank.
Preferably, the magnetic field generated by the coil is the same as the magnetic pole of the magnet on the opposite surface, the magnetic induction ensures that the magnetic field generated by the coil pushes the magnet to move downwards, and the magnet drives the driving device, the rotating shaft and the cleaning head to move downwards.
(III) advantageous effects
Compared with the prior art, the invention provides the retracting device capable of automatically cleaning the fire hose, which has the following beneficial effects:
1. this winding and unwinding devices of self-cleaning fire hose through the pulling water pipe, and the water pipe passes through the elastic layer and drives the live-rollers at the inclined groove and remove left, and up to the live-rollers removal to the leftmost end in inclined groove, the elastic layer is less with the water pipe to be convenient for pull out of water pipe.
2. According to the winding and unwinding device capable of automatically cleaning the fire-fighting water pipe, the water pipe is pulled at different angles, and the water pipe drives the first support frame to move in the guide groove through the rotating roller; the water pipe drives the second support frame to rotate in the rotating groove, and the structure achieves the purpose of flexibly moving the angle of the water pipe, so that the problem that the water pipe is deformed easily due to the existing angle movement of the water pipe is solved.
3. This but winding and unwinding devices of self-cleaning fire water pipe, when receiving and releasing, drive rolling dish rolling water pipe through drive arrangement, the water pipe passes through the elastic layer and drives the live-rollers and remove at the inclined groove rightwards, moves the rightmost end of inclined groove up to the live-rollers, and live-rollers and water pipe pressure are great to be convenient for extrude the inside unnecessary water of water pipe.
4. This winding and unwinding devices that can self-cleaning fire hose, the first magnetic path of upper portion pivot rear end promotes the second magnetic path downstream, the second magnetic path drives metal ball and sheetmetal contact on it, there is the electric current in the coil of establishing ties with metal ball and sheetmetal, the magnetic field that the coil produced promotes the magnet downstream, the magnet drives drive arrangement, pivot and cleaning head downstream, drive arrangement drives the cleaning head and washs the water pipe, this structure has reached the purpose of self-cleaning water pipe when the rolling, thereby it possesses the cleaning efficiency low to have solved current fire hose belt cleaning device, fire fighter working strength is big, the water pipe washs not comprehensively and can not carry out the abluent problem of water pipe automatically.
Drawings
FIG. 1 is a schematic view of the overall front structure of the present invention;
FIG. 2 is a sectional view of the overall front structure of the present invention;
FIG. 3 is an enlarged view of the structure of FIG. 2 at A according to the present invention;
FIG. 4 is a sectional view of a structure related to the rear portion of the rotating shaft according to the present invention;
FIG. 5 is an enlarged view of the structure of FIG. 4 at B in accordance with the present invention;
FIG. 6 is a sectional view of the top view of the rolling box of the present invention.
In the figure: the cleaning device comprises a winding box 1, a sliding groove 101, a guide groove 102, a rotating groove 103, an inclined groove 104, a sliding plate 2, a first support frame 3, a rotating shaft 301, a first magnetic block 3011, a rotating roller 4, an elastic layer 401, a second magnetic block 5, a metal ball 501, a metal sheet 502, a first spring 6, a second support frame 7, a winding disc 8, a water pipe 801, a water tank 9, a filter plate 901, a cleaning device 10, a water pipe 11, a magnet 12, a coil 13, a driving device 14, a rotating shaft 15, a second spring 16 and a cleaning head 17.
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. 1-6, a winding and unwinding device for automatically cleaning fire hose comprises a winding box 1, sliding grooves 101 are respectively formed on the left and right sides of the front portion of the winding box 1, a guide groove 102 is formed on the left side of the inner lower surface of the winding box 1, a rotating groove 103 is formed on the right side of the inner lower surface of the winding box 1, an inclined groove 104 is formed on the left side of the inner rear surface of the winding box 1, a sliding plate 2 is slidably connected to the front side of the winding box 1 in the sliding grooves 101, a first support frame 3 is slidably connected to the inner portion of the winding box 1 in the guide groove 102, a symmetrical rotating shaft 301 is arranged on the upper side of the first support frame 3 in the inclined groove 104, a first magnet 3011 is arranged at the rear end of the upper rotating shaft 301, symmetrical rotating rollers 4 are arranged on the upper side of the first support frame 3, an elastic layer 401 is arranged on the outer side of the rotating rollers 4, a second magnet 5 is slidably connected to the, the right end of the second magnet 5 is provided with a metal ball 501, the right end of the metal ball 501 is provided with a metal sheet 502 in the winding box 1, the lower end of the second magnet 5 is fixedly connected with a first spring 6, the inside of the winding box 1 is rotatably connected with a second support frame 7 in the rotating groove 103, the upper part of the second support frame 7 is rotatably connected with a winding disc 8, the outer side of the winding disc 8 is wound with a water pipe 801, and the guide groove 102 is a closed elliptical arc-shaped groove, so that the first support frame 3 is ensured to drive the rotating roller 4 to swing left and right along with the water pipe 801 and correspond to the inclined groove 104 when being wound and unwound. The distance between the upper and lower inclined grooves 104 is gradually reduced from left to right, so that when the water pipe 801 is used, the pressure between the rotating roller 4 and the water pipe 801 is small, and the water pipe 801 is convenient to pull out; when the water pipe 801 is retracted, the pressure between the rotating roller 4 and the water pipe 801 is higher, so that the excessive water in the water pipe 801 can be squeezed conveniently.
The water tank 9 is fixedly connected to the inner side of the winding box 1, the filter plate 901 is arranged in the middle of the water tank 9, the cleaning devices 10 are arranged inside and right above the water tank 9, the water pipe 11 is fixedly connected to the left side of the cleaning devices 10, and the spray heads at the lower portion of the water pipe 11 are circular, so that water sprayed out of the spray heads at the lower portion of the water pipe 11 corresponds to the width of the water pipe 801. The upper and lower water pipes 11 are connected with the water tank 9, and a water pump is arranged inside the water tank 9. The inside of belt cleaning device 10 all sliding connection has magnet 12, the upside of magnet 12 just is provided with coil 13 in belt cleaning device 10, the lower extreme fixedly connected with drive arrangement 14 of magnet 12, drive arrangement 14's lower extreme rotates and is connected with pivot 15, the outside of pivot 15 is provided with second spring 16, the lower extreme fixedly connected with cleaning head 17 of pivot 15, the magnetic field that coil 13 produced is the same with the magnetic pole of opposite face magnet 12, magnetic induction and the magnetic field that guarantees coil 13 production promote magnet 12 to move down, magnet 12 drives drive arrangement 14, pivot 15 and cleaning head 17 and moves down.
The working principle is as follows: this but winding and unwinding devices of self-cleaning fire water pipe, when using, through pulling water pipe 801, water pipe 801 passes through elastic layer 401 and drives turning roll 4 and move left at inclined groove 104, and until turning roll 4 moves the leftmost end of inclined groove 104, at this moment, elastic layer 401 is less with water pipe 801 to be convenient for pull out of water pipe 801.
Through different angle pulling water pipe 801, water pipe 801 passes through live-rollers 4 and drives first support frame 3 and remove in guide way 102, and simultaneously, water pipe 801 drives second support frame 7 and rotates in live-rollers 103, and this structure has reached the purpose that water pipe 801 angle nimble removed to solved current water pipe 801 angular displacement and leaded to water pipe 801 to warp easily.
When the water pipe 801 is wound and unwound, the winding disc 8 is driven by the driving device to wind the water pipe 801, the water pipe 801 drives the rotating roller 4 to move rightwards in the inclined groove 104 through the elastic layer 401 until the rotating roller 4 moves to the rightmost end of the inclined groove 104, at the moment, the pressure between the rotating roller 4 and the water pipe 801 is larger, so that redundant water in the water pipe 801 can be squeezed conveniently, meanwhile, the first magnetic block 3011 at the rear end of the upper rotating shaft 301 pushes the second magnetic block 5 to move downwards, the second magnetic block 5 drives the metal ball 501 on the second magnetic block to contact with the metal sheet 502, current is provided in the coil 13 connected in series with the metal ball 501 and the metal sheet 502, the magnetic field generated by the coil 13 pushes the magnet 12 to move downwards, the magnet 12 drives the driving device 14, the rotating shaft 15 and the cleaning head 17 to move downwards, the driving device 14 drives the cleaning head 17 to clean the water pipe 801, and the, thereby solved current fire hose belt cleaning device possess the cleaning efficiency low, fire fighter working strength is big, the water pipe washs not comprehensively and can not carry out the abluent problem of water pipe automatically.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a but self-cleaning fire hose's winding and unwinding devices, includes winding box (1), its characterized in that: the left side and the right side of the front part of the winding box (1) are both provided with sliding grooves (101), the left side of the inner lower surface of the winding box (1) is provided with a guide groove (102), the right side of the inner lower surface of the winding box (1) is provided with a rotating groove (103), the left side of the inner rear surface of the winding box (1) is provided with an inclined groove (104), the front side of the winding box (1) is connected with a sliding plate (2) in the sliding groove (101), the inside of the winding box (1) is connected with a first support frame (3) in the guide groove (102) in a sliding way, the upper side of the first support frame (3) is provided with a symmetrical rotating shaft (301) in the inclined groove (104), the rear end of the upper rotating shaft (301) is provided with a first magnet (3011), the upper side of the first support frame (3) is provided with a symmetrical rotating roller (4), the outer side of the rotating roller (4) is provided with an elastic layer (401), the inside of the winding box (1), a metal ball (501) is arranged at the right end of the second magnetic block (5), a metal sheet (502) is arranged at the right end of the metal ball (501) and in the rolling box (1), a first spring (6) is fixedly connected at the lower end of the second magnetic block (5), a second support frame (7) is rotatably connected in the rolling box (1) and in the rotating groove (103), a rolling disc (8) is rotatably connected at the upper part of the second support frame (7), a water pipe (801) is wound on the outer side of the rolling disc (8), a water tank (9) is fixedly connected at the middle inside middle side of the rolling box (1), a filter plate (901) is arranged at the middle part of the water tank (9), cleaning devices (10) are respectively arranged in and above the water tank (9), a water pipe (11) is fixedly connected at the left inside of the cleaning device (10), a magnet (12) is respectively and slidably connected in the inside of the cleaning device (10), a coil (13) is arranged at the upper side of, the lower end of the magnet (12) is fixedly connected with a driving device (14), the lower end of the driving device (14) is rotatably connected with a rotating shaft (15), a second spring (16) is arranged on the outer side of the rotating shaft (15), and the lower end of the rotating shaft (15) is fixedly connected with a cleaning head (17).
2. The retracting device of the fire hose capable of being automatically cleaned according to claim 1, wherein: the guide groove (102) is a closed elliptical arc-shaped groove.
3. The retracting device of the fire hose capable of being automatically cleaned according to claim 1, wherein: the distance between the upper and lower inclined grooves (104) is gradually reduced from left to right.
4. The retracting device of the fire hose capable of being automatically cleaned according to claim 1, wherein: the magnetic pole at the lower end of the first magnetic block (3011) has the same direction with the magnetic pole at the upper part of the second magnetic block (5).
5. The retracting device of the fire hose capable of being automatically cleaned according to claim 1, wherein: the spray head at the lower part of the water pipe (11) is circular.
6. The retracting device of the fire hose capable of being automatically cleaned according to claim 1, wherein: the upper water pipe and the lower water pipe (11) are connected with the water tank (9), and a water pump is arranged inside the water tank (9).
7. The retracting device of the fire hose capable of being automatically cleaned according to claim 1, wherein: the coil (13) generates a magnetic field having the same polarity as the opposing face magnet (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010445319.0A CN111620201B (en) | 2020-05-24 | 2020-05-24 | But self-cleaning fire hose's winding and unwinding devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010445319.0A CN111620201B (en) | 2020-05-24 | 2020-05-24 | But self-cleaning fire hose's winding and unwinding devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111620201A true CN111620201A (en) | 2020-09-04 |
| CN111620201B CN111620201B (en) | 2022-02-08 |
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| CN202010445319.0A Active CN111620201B (en) | 2020-05-24 | 2020-05-24 | But self-cleaning fire hose's winding and unwinding devices |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113443526A (en) * | 2021-05-27 | 2021-09-28 | 张文军 | Hose coiling mechanism |
| CN113697611A (en) * | 2021-09-15 | 2021-11-26 | 福建闽山消防有限公司 | Quick unwinding device of outdoor fire hose |
| CN113770078A (en) * | 2021-08-18 | 2021-12-10 | 中电建路桥集团有限公司 | Quick assembly disassembly self-cleaning equipment of precast beam pterygoid lamina exempts from chisel hair and ends thick liquid area |
| CN115415238A (en) * | 2022-07-20 | 2022-12-02 | 上海太同弹簧有限公司 | Spring production process |
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| CN113770078A (en) * | 2021-08-18 | 2021-12-10 | 中电建路桥集团有限公司 | Quick assembly disassembly self-cleaning equipment of precast beam pterygoid lamina exempts from chisel hair and ends thick liquid area |
| CN113697611A (en) * | 2021-09-15 | 2021-11-26 | 福建闽山消防有限公司 | Quick unwinding device of outdoor fire hose |
| CN115415238A (en) * | 2022-07-20 | 2022-12-02 | 上海太同弹簧有限公司 | Spring production process |
| CN115415238B (en) * | 2022-07-20 | 2023-10-03 | 上海太同弹簧有限公司 | Spring production process |
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| CN111620201B (en) | 2022-02-08 |
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