CN110947143A - High-safety anti-freezing fire-fighting spray head used in winter - Google Patents
High-safety anti-freezing fire-fighting spray head used in winter Download PDFInfo
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- CN110947143A CN110947143A CN201911363710.XA CN201911363710A CN110947143A CN 110947143 A CN110947143 A CN 110947143A CN 201911363710 A CN201911363710 A CN 201911363710A CN 110947143 A CN110947143 A CN 110947143A
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- fire
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
- A62C37/14—Releasing means, e.g. electrically released heat-sensitive with frangible vessels
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention relates to the technical field of fire fighting equipment, and discloses a high-safety anti-freezing fire fighting nozzle in winter, which comprises a fire fighting nozzle body, wherein a threaded pipe is arranged at the top of the fire fighting nozzle body, a fire fighting water inlet is arranged inside the threaded pipe, a water plugging plug is movably arranged at the bottom of the fire fighting water inlet, two sealing gaskets are fixedly arranged between the periphery of the water plugging plug and the bottom end of the fire fighting water inlet and positioned on the water plugging plug, a glass ball is arranged right below the water plugging plug, and thermosensitive liquid is filled in the glass ball. This high fire control shower nozzle that prevents frostbite in winter of security is through establishing the dysmorphism dish that ices into the plane of top indent, can be so that the top of the dysmorphism dish that ices be weak stress surface, and the volume expansion that freezes when the water in the fire water inlet, the dysmorphism dish that ices breaks in preference to the glass ball, has reduced the freezing point after the ice in the fire water inlet contacts with the inside exposed sodium chloride powder of the dysmorphism dish that ices to prevent to freeze and continue to generate extrusion glass ball and cause the destruction.
Description
Technical Field
The invention relates to the technical field of fire fighting equipment, in particular to a winter anti-freezing fire fighting spray head with high safety.
Background
The fire-fighting nozzle is a fire-fighting device which can automatically start and spray water to extinguish fire according to a preset temperature when a fire disaster happens.
Referring to fig. 1, a conventional fire sprinkler structure has the following working principle: through screwed pipe 2 with fire control shower nozzle body 1 and the butt joint of fire hose for fire water can stop in the inside of fire water import 3, in case the conflagration takes place to reach predetermined temperature, the quick inflation of the inside temperature sensing liquid 7 of glass ball is cracked 6 blooms glass ball, and 6 blooms the back water shutoff stopper 4 and loses the holding power and is extruded by the pressure of fire water, and fire water pours out the burning things which may cause a fire disaster to splashing all around through splashing dish 9.
In the process described by the working principle, the glass ball 6 plays an important role in the working process of the fire-fighting nozzle, however, the fire-fighting nozzle still has the condition of false start in the actual use process, for example, when the temperature is lower than-5 ℃ in winter, the water in the fire-fighting water pipe freezes and expands in volume, the expansion force is directly acted on the glass ball 6 through the water plugging plug 4 to cause the burst of the glass ball 6, in addition, the traditional glass ball 6 is directly exposed outside, once the glass ball 6 bursts due to accidental collision, a large amount of fire-fighting water can be caused to flow out, indoor belongings or goods are wetted or wetted, and further unexpected economic loss is caused.
Disclosure of Invention
The invention provides a high-safety winter anti-freezing fire-fighting nozzle which has the advantages that sodium chloride is filled in an ice melting special-shaped disc, ice in a fire-fighting water inlet can be melted after the ice melting special-shaped disc is crushed, the safety and water leakage of a glass ball are ensured, the glass ball is prevented from being crushed accidentally by a hidden glass ball, and the safety is ensured.
The invention provides the following technical scheme: a winter anti-freezing fire-fighting nozzle with high safety comprises a fire-fighting nozzle body, wherein a screwed pipe is arranged at the top of the fire-fighting nozzle body, a fire-fighting water inlet is formed in the screwed pipe, a water blocking plug is movably arranged at the bottom of the fire-fighting water inlet, a sealing gasket is fixedly arranged between the periphery of the water blocking plug and the bottom of the fire-fighting water inlet, a glass ball is movably arranged at the bottom of the water blocking plug, thermosensitive liquid is filled in the glass ball, a screw is movably arranged at the bottom of the fire-fighting nozzle body, a splash disc is movably arranged at the outer edge of the screw and is movably arranged at the bottom of the fire-fighting nozzle body through the screw, an ice-dissolving special-shaped disc is glued at the top of the water blocking plug, sodium chloride powder is filled in the ice-dissolving special-shaped disc, and a fixed rubber ring is fixedly arranged at the outer edge of the glass ball at the left, the right side movable mounting of solid fixed rubber circle has a clamping structure, the bottom of changing ice dysmorphism dish is equipped with the skirt edge, it splices along the top with the water shutoff stopper to change ice dysmorphism dish, clamping structure includes the motion rubber circle, in the inboard arc recess of motion rubber circle embedding fire control shower nozzle body, the inside of motion rubber circle is equipped with the centre gripping sunken, the right side movable mounting of motion rubber circle has the screw, the motion rubber circle is equipped with the fixed slot with the screw junction, the leftmost end of screw is equipped with the joint, the screw passes through joint and fixed slot activity joint.
Preferably, the water shutoff plug is prepared by transparent crystal.
Preferably, the glass ball is a hollow glass oblate spheroid with a circular top view, and the height inside the glass ball is gradually increased from the periphery to the middle.
Preferably, the special ice melting disc is a special-shaped disc body made of glass, the limit bearing capacity of the special ice melting disc is between the fire fighting water pressure at a fire fighting water inlet and the limit bearing capacity of the glass ball, and the top end of the special ice melting disc is provided with an inward concave shape.
The invention has the following beneficial effects:
1. this high fire control shower nozzle that prevents frostbite in winter of security is through establishing the dysmorphism dish that ices into the plane of top indent, can be so that the top of the dysmorphism dish that ices be weak stress surface, and the volume expansion that freezes when the water in the fire water inlet, the dysmorphism dish that ices breaks in preference to the glass ball, has reduced the freezing point after the ice in the fire water inlet contacts with the inside exposed sodium chloride powder of the dysmorphism dish that ices to prevent to freeze and continue to generate extrusion glass ball and cause the destruction.
2. This high fire control shower nozzle that prevents frostbite winter of security, pass through the fixed rubber circle with the glass ball, clamping structure, fixed slot and joint level are hidden and are installed under the water shutoff stopper, under the protection of fixed rubber circle and clamping structure, can effectively avoid the glass ball to receive unexpected collision and the fire control shower nozzle mistake that leads to starts, and simultaneously, the rubber elasticity performance of fixed rubber circle and clamping structure, can provide the glass ball to push down the buffer segment when water pressure fluctuation and the frozen extrusion of water in the fire pipeline, further guarantee the safety in utilization of glass ball.
Drawings
FIG. 1 is a sectional view of a conventional fire sprinkler body;
FIG. 2 is a front sectional view of the present invention;
FIG. 3 is a cross-sectional view of an uninstalled structure of the glass ball of the present invention;
FIG. 4 is an enlarged view of the structure A of the present invention;
FIG. 5 is a perspective view of the ice melting profile disc structure of the present invention;
FIG. 6 is a combination view of a retaining rubber ring and clamping structure according to the present invention;
FIG. 7 is a cross-sectional view of a clamping structure of the present invention.
In the figure: 1. a fire sprinkler body; 2. a threaded pipe; 3. a fire water inlet; 4. water plugging; 5. a gasket; 6. a glass ball; 7. a heat-sensitive liquid; 8. screws; 9. a splash pan; 10. an ice melting special-shaped disc; 11. sodium chloride powder; 12. fixing a rubber ring; 13. a clamping structure; 1301. a moving rubber ring; 1302. a clamping recess; 1303. a threaded nail; 14. fixing the skirt edge; 15. fixing grooves; 16. and (4) clamping a connector.
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. 1-7, a high-safety anti-freezing fire sprinkler in winter comprises a fire sprinkler body 1, a threaded pipe 2 is arranged at the top of the fire sprinkler body 1, a fire water inlet 3 is arranged inside the threaded pipe 2, a water shutoff plug 4 is movably arranged at the bottom of the fire water inlet 3, the water shutoff plug 4 is made of transparent crystal, the crystal has good hardness support, so that the water shutoff sprinkler has better stability when water is blocked, in addition, the water shutoff plug 4 is transparent, so that the use condition of sodium chloride powder 11 at the top of the water shutoff plug 4 can be observed through the water shutoff plug 4 when the weather is cold, if the sodium chloride powder 11 is used and replaced by one water shutoff plug 4, two sealing gaskets 5 are fixedly arranged between the periphery of the water shutoff plug 4 and the bottom end of the fire water inlet 3 and on the water shutoff plug 4, and the two sealing gaskets 5 are distributed at two positions of the water shutoff plug 4, one is located the side skirt of the water shutoff plug 4 and the bottom contact zone of the fire water inlet 3, and the other is located the side wall of the side of the water shutoff plug 4 contacting the fire water inlet 3, thus can guarantee the sealing effect of the sealing gasket 5 of the side in the process of the up-and-down movement of the water shutoff plug 4, and is not easy to leak water, a glass ball 6 is arranged under the water shutoff plug 4, the glass ball 6 is a hollow glass oblate spheroid with a circular overlooking figure, and the distance from the periphery to the middle of the inside of the glass ball 6 is gradually increased, through arranging a hollow structure in the glass ball 6, a heat-sensitive liquid 7 can be filled in the hollow structure, the heat-sensitive liquid 7 can be guaranteed to burst the glass ball 6 when reaching a preset temperature, the glass ball 6 can be guaranteed to work normally, in addition, the heat-sensitive liquid 7 usually uses kerosene or alcohol, and can work normally in cold weather, the heat-sensitive liquid 7 is filled in the glass ball 6, the screw 8 is movably mounted at the bottom end of the fire-fighting nozzle body 1, the splash disc 9 is movably mounted at the outer edge of the screw 8, the splash disc 9 is movably mounted at the bottom end of the fire-fighting nozzle body 1 through the screw 8, the top of the water shutoff plug 4 is connected with the ice-melting special-shaped disc 10 in a gluing mode, the ice-melting special-shaped disc 10 is a special-shaped disc body made of glass, the top end of the ice-melting special-shaped disc 10 is provided with an inward concave shape, the inward concave shape in the plane at the top end of the ice-melting special-shaped disc 10 can be set to be a rectangle, a cylinder or a round table, the limit bearing capacity at the top end of the ice-melting special-shaped disc 10 is between the fire-fighting water pressure at the fire-fighting water inlet 3 and the limit bearing capacity of the glass ball 6, and the ice-, so that the sodium chloride powder 11 inside the shaped ice tray 10 is contacted with ice to melt and freeze the generated brine to greatly lower the freezing point, and the shaped ice tray cannot continue to form ice at the same temperature, in addition, the pressure born by the shaped ice tray 10 is larger than the pressure of fire water at the fire water inlet 3, so as to prevent the pressure of the fire water at the fire water inlet 3 from crushing the shaped ice tray 10, which leads to the accidental breakage of the shaped ice tray 10 and causes unnecessary economic loss, the inside of the shaped ice tray 10 is filled with the sodium chloride powder 11, the left side of the outer edge of the glass ball 6 inside the fire nozzle body 1 is fixedly provided with a fixed rubber ring 12, the right side of the fixed rubber ring 12 is movably provided with a clamping structure 13, the fixed rubber ring 12 is fixedly arranged in an arc-shaped groove arranged inside the fire nozzle body 1, and the fixed rubber ring 12 is matched with the clamping structure 13 to limit the glass ball 6, the bottom of the ice melting special-shaped disc 10 is provided with a fixed skirt edge 14, the ice melting special-shaped disc 10 is connected with the top of the water plugging plug 4 through the fixed skirt edge 14 in an adhesive mode, the clamping structure 13 comprises a moving rubber ring 1301, the moving rubber ring 1301 is embedded into an arc-shaped groove on the inner side of the fire sprinkler body 1, a clamping recess 1302 is formed in the moving rubber ring 1301, a threaded nail 1303 is movably mounted on the right side of the moving rubber ring 1301, a fixing groove 15 is formed in the joint of the moving rubber ring 1301 and the threaded nail 1303, a clamping head 16 is arranged at the leftmost end of the threaded nail 1303, the clamping head 16 can rotate in the fixing groove 15 along with the rotation of the threaded nail 1303, the fixing groove 15 plays a limiting role while guaranteeing the motion characteristic of the clamping head 16, and through the arrangement, the moving rubber ring 1301 can not rotate along with the threaded nail 1303 in the rotation process, so that the left-right motion of the moving rubber, can guarantee this stable centre gripping effect of motion rubber circle 1301 again, the outside of screw 1303 is provided with the external screw thread, and the external screw thread of screw 1303 outside is inseparable with the interior thread engagement on the fire control shower nozzle body 1, the outside through screw 1303 is provided with the external screw thread, can make the external screw thread of this screw 1303 and the interior thread intermeshing on the fire control shower nozzle body 1, guarantee that screw 1303 can be on fire control shower nozzle body 1 side-to-side movement, thereby guarantee clamping structure 13 to the centre gripping of glass ball 6 with relax, screw 1303 passes through joint 16 and fixed slot 15 activity joint.
The working principle is that in the working process of the fire-fighting nozzle, the fire-fighting nozzle body 1 is connected with a fire-fighting pipeline through a threaded pipe 2, so that fire-fighting water can be filled into a fire-fighting water inlet 3, when the temperature is lower than minus 5 ℃, the frozen volume of water in the fire-fighting water inlet 3 is continuously increased, the ice-melting special-shaped disc 10 is extruded and the ice-melting special-shaped disc 10 is crushed, at the moment, sodium chloride powder 11 in the ice-melting special-shaped disc 10 is exposed, the sodium chloride powder 11 is in contact with ice and melts the ice to generate a little saline water, the freezing point of the saline water is about minus 10 ℃ to minus 20 ℃, the temperature of about minus 5 ℃ cannot be continuously frozen after the freezing point of the fire-fighting water is greatly reduced, in addition, the structure of the glass ball 6 is hidden at the bottom of the fire-fighting nozzle body 1, the bottom of the glass ball 6 is in contact, with 6 spallings of glass ball, because water shutoff plug 4 has lost the supporting role of glass ball 6 this moment for the pressure of fire water can easily be washed water shutoff plug 4, and the fire water splashes and puts out the fire source through water splash disk 9, can.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (4)
1. The utility model provides a high fire control shower nozzle that prevents frostbite in winter of security, includes fire control shower nozzle body (1), its characterized in that: the fire-fighting nozzle is characterized in that a threaded pipe (2) is arranged at the top of the fire-fighting nozzle body (1), a fire-fighting water inlet (3) is arranged in the threaded pipe (2), a water blocking plug (4) is movably arranged at the bottom of the fire-fighting water inlet (3), two sealing gaskets (5) are fixedly arranged between the periphery of the water blocking plug (4) and the bottom of the fire-fighting water inlet (3) and positioned on the water blocking plug (4), a glass ball (6) is arranged under the water blocking plug (4), thermosensitive liquid (7) is filled in the glass ball (6), a screw (8) is movably arranged at the bottom end of the fire-fighting nozzle body (1), a water disc (9) is movably arranged at the outer edge of the screw (8), the water disc (9) is movably arranged with the bottom end of the fire-fighting nozzle body (1) through the screw (8), and a special ice disc (10) is glued at the top of the water blocking plug (4), the special-shaped ice melting disc is characterized in that sodium chloride powder (11) is filled in the special-shaped ice melting disc (10), a fixed rubber ring (12) is fixedly arranged on the outer edge of the glass ball (6) along the left side inside the fire-fighting nozzle body (1), a clamping structure (13) is movably arranged on the right side of the fixed rubber ring (12), a fixed skirt edge (14) is arranged at the bottom of the special-shaped ice melting disc (10), the special-shaped ice melting disc (10) is connected with the top of the water plugging plug (4) through the fixed skirt edge (14), the clamping structure (13) comprises a moving rubber ring (1301), the moving rubber ring (1301) is embedded into an arc-shaped groove on the inner side of the fire-fighting nozzle body (1), a clamping recess (1302) is arranged in the moving rubber ring (1301), a threaded nail (1303) is movably arranged on the right side of the moving rubber ring (1301), a fixing groove (15) is arranged at the joint of the moving rubber ring (, the leftmost end of the screw thread nail (1303) is provided with a clamping joint (16), and the screw thread nail (1303) is movably clamped with the fixing groove (15) through the clamping joint (16).
2. The anti-freezing fire sprinkler in winter with high safety as claimed in claim 1, characterized in that: the water plugging plug (4) is prepared from transparent crystals.
3. The anti-freezing fire sprinkler in winter with high safety as claimed in claim 1, characterized in that: the glass ball (6) is a hollow glass oblate sphere with a circular overlooking figure, and the height inside the glass ball (6) is gradually increased from the periphery to the middle.
4. The anti-freezing fire sprinkler in winter with high safety as claimed in claim 1, characterized in that: the special-shaped ice melting disc (10) is a special-shaped disc body made of glass, an inward concave shape is arranged at the top end of the special-shaped ice melting disc (10), and the limit bearing capacity of the top end of the special-shaped ice melting disc (10) is between the fire water pressure at the fire water inlet (3) and the limit bearing capacity of the glass ball (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911363710.XA CN110947143B (en) | 2019-12-26 | 2019-12-26 | High-safety anti-freezing fire-fighting spray head used in winter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911363710.XA CN110947143B (en) | 2019-12-26 | 2019-12-26 | High-safety anti-freezing fire-fighting spray head used in winter |
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| Publication Number | Publication Date |
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| CN110947143A true CN110947143A (en) | 2020-04-03 |
| CN110947143B CN110947143B (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911363710.XA Expired - Fee Related CN110947143B (en) | 2019-12-26 | 2019-12-26 | High-safety anti-freezing fire-fighting spray head used in winter |
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| CN (1) | CN110947143B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112569510A (en) * | 2021-01-13 | 2021-03-30 | 山东雷纳新材料工程有限公司 | Mechanical temperature-sensing type bursting fire extinguishing device |
| CN113181581A (en) * | 2021-03-24 | 2021-07-30 | 朱恩娇 | Winter explosion-proof type fire sprinkler head |
| CN113503415A (en) * | 2021-09-13 | 2021-10-15 | 南通久鼎特种钢管有限公司 | Stainless steel water pipe capable of delaying icing |
| CN115025432A (en) * | 2022-06-16 | 2022-09-09 | 江苏桐方消防科技集团股份有限公司 | Fire sprinkler head capable of preventing low-temperature freezing |
| CN115364411A (en) * | 2022-08-22 | 2022-11-22 | 浙江铭匠精工有限公司 | Spray head for fire control |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1054006A (en) * | 1996-08-09 | 1998-02-24 | Nof Corp | Antifreezing admixture supply device |
| US20090194298A1 (en) * | 2006-06-12 | 2009-08-06 | Goran Sundholm | Method and apparatus in connection with spraying head and protective element of spraying head |
| CN103446689A (en) * | 2013-08-11 | 2013-12-18 | 江苏锡宜消防工程有限公司 | Heating cap of water outlet of fire-fighting vehicle |
| CN206046309U (en) * | 2016-07-28 | 2017-03-29 | 美尚生态景观股份有限公司 | Antifreeze shower nozzle |
| CN206924292U (en) * | 2017-04-13 | 2018-01-26 | 井冈山市玉捷消防科技有限公司 | A kind of passageway detects fire extinguishing sprayer automatically |
-
2019
- 2019-12-26 CN CN201911363710.XA patent/CN110947143B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1054006A (en) * | 1996-08-09 | 1998-02-24 | Nof Corp | Antifreezing admixture supply device |
| US20090194298A1 (en) * | 2006-06-12 | 2009-08-06 | Goran Sundholm | Method and apparatus in connection with spraying head and protective element of spraying head |
| CN103446689A (en) * | 2013-08-11 | 2013-12-18 | 江苏锡宜消防工程有限公司 | Heating cap of water outlet of fire-fighting vehicle |
| CN206046309U (en) * | 2016-07-28 | 2017-03-29 | 美尚生态景观股份有限公司 | Antifreeze shower nozzle |
| CN206924292U (en) * | 2017-04-13 | 2018-01-26 | 井冈山市玉捷消防科技有限公司 | A kind of passageway detects fire extinguishing sprayer automatically |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112569510A (en) * | 2021-01-13 | 2021-03-30 | 山东雷纳新材料工程有限公司 | Mechanical temperature-sensing type bursting fire extinguishing device |
| CN113181581A (en) * | 2021-03-24 | 2021-07-30 | 朱恩娇 | Winter explosion-proof type fire sprinkler head |
| CN113181581B (en) * | 2021-03-24 | 2022-08-26 | 福建步盛消防有限公司 | Winter explosion-proof type fire sprinkler head |
| CN113503415A (en) * | 2021-09-13 | 2021-10-15 | 南通久鼎特种钢管有限公司 | Stainless steel water pipe capable of delaying icing |
| CN113503415B (en) * | 2021-09-13 | 2021-11-09 | 南通久鼎特种钢管有限公司 | Stainless steel water pipe capable of delaying icing |
| CN115025432A (en) * | 2022-06-16 | 2022-09-09 | 江苏桐方消防科技集团股份有限公司 | Fire sprinkler head capable of preventing low-temperature freezing |
| CN115364411A (en) * | 2022-08-22 | 2022-11-22 | 浙江铭匠精工有限公司 | Spray head for fire control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110947143B (en) | 2020-12-15 |
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Effective date of registration: 20201130 Address after: 314000 span 7, southeast corner, building 2-2, no.958, Xingyun Road, Qixing street, Nanhu District, Jiaxing City, Zhejiang Province Applicant after: Zhejiang Yicheng environmental protection equipment Co.,Ltd. Address before: No. 56, Yongren village, Hufang Town, Qingshanhu District, Nanchang City, Jiangxi Province 330000 Applicant before: Deng Wenhan |
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Granted publication date: 20201215 Termination date: 20211226 |