CN205913836U - A filter equipment for pipe filters - Google Patents
A filter equipment for pipe filters Download PDFInfo
- Publication number
- CN205913836U CN205913836U CN201620510021.2U CN201620510021U CN205913836U CN 205913836 U CN205913836 U CN 205913836U CN 201620510021 U CN201620510021 U CN 201620510021U CN 205913836 U CN205913836 U CN 205913836U
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- CN
- China
- Prior art keywords
- filter
- pipeline
- drainage screen
- filter house
- release portion
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a filter equipment for pipe filters belongs to the filter field, including pressure release portion, filter house and fixed part, the filter house is the infundibulate, and an interface of filter house links to each other with the fixed part, another interface links to each other with pressure release portion, and this fixed part is used for connecting the inside wall of body. This filter house can be convenient install the junction at the pipeline, be favorable to the dismouting of pipeline, and simultaneously, because the design of above -mentioned pressure release portion, can reduce the impact of the interior liquid of pipeline to the filter house, alleviate the pressure differential of filter house both sides, thereby the life of effectual improvement filter house, furthermore, because the design of pressure release portion, can use the very fast position of the velocity of flow with this device, realize the filtration of high flow capacity or high flow rate, and need not to carry out the deceleration to the liquid in the pipeline, can't realize filterable defect in overcoming prior art in high flow capacity liquid, furthermore, this device is arranged in the pipeline but not outside the pipeline, guarantee pipe -line system's aesthetic property.
Description
Technical field
This utility model is related to a kind of defecator for filter pipeline, belongs to art of filters.
Background technology
Filter is indispensable a kind of device on pumped (conveying) medium pipeline, is typically mounted on air relief valve, relief valve, Ding Shui
Position valve, the import end equipment of square work filter miscellaneous equipment.Filter is by cylinder, stainless steel filtering net, blowdown part, transmission dress
Put and electrical control division is grouped into.After the filter cylinder of strainer screen, its impurity is blocked pending water, when need clean
When, as long as dismountable filter cylinder is taken out, reload after process, therefore, working service extremely convenient.Filter works
When, enter when water to be filtered is by the mouth of a river, flow through filter screen, carry out process cycles by exporting into the needed pipeline of access customer, in water
Granule acrobatics be trapped within its interior.So constantly circulate, the granule being retained down gets more and more, and the rate of filtration is got over
Come slower, and the sewage of import still continuously enters, filter opening can be less and less.
Due to filtering, often reduce the speed of current in pipeline due to filter, and, prolonging with use time
Long, after filter blocks, the flow velocity of current will be severely restricted.
Utility model content
Utility model purpose of the present utility model is: for above-mentioned problem, provides one kind to be used for filter pipeline
Defecator, reduce pipeline in liquid for filter house impact, alleviate filter house both sides pressure differential, thus effectively carrying
This device can be applied to flow velocity position faster, realize the filtration of high flow capacity or high flow rate by the service life in high filtration portion,
And the liquid in pipeline need not be carried out with reduction of speed, overcome the defect that cannot realize filtering in prior art in high flow capacity liquid,
This device be placed in pipeline rather than pipeline outer it is ensured that the aesthetic property of tubing, meanwhile, this structure setting in pipeline junction,
Therefore, this device is recursive is arranged in same tubing, improves filter efficiency.
The technical solution adopted in the utility model is as follows:
The utility model discloses a kind of defecator for filter pipeline, including pressure release portion, filter house and fixed part；
Filter house is in infundibulate, and an interface of filter house is connected with fixed part, another interface is connected with pressure release portion, and this fixed part is used for
The medial wall of connection pipe body.
Due to said structure, this filter house can be conveniently installed at the junction of pipeline, is conducive to the dismounting of pipeline, with
When, due to the design in above-mentioned pressure release portion, liquid in pipeline can be reduced and, for the impact of filter house, alleviate the pressure of filter house both sides
Power is poor, thus effectively improving the service life of filter house, further, since the design in pressure release portion, can be applied to this device
Flow velocity position faster, realizes the filtration of high flow capacity or high flow rate, and the liquid in pipeline need not be carried out with reduction of speed, overcomes existing
The defect filtering cannot be realized in high flow capacity liquid, additionally, this device is placed in pipeline rather than outside pipeline it is ensured that managing in technology
The aesthetic property of road system, meanwhile, in pipeline junction, therefore, this device is recursive to be arranged on same pipe to this structure setting
In road system, improve filter efficiency.
Further, this filter house includes the first drainage screen and filter, and this first drainage screen is connected to pressure release portion and consolidates
Determine between portion, the first drainage screen is in infundibulate, filter is located inside the first drainage screen.Due to said structure, the first drainage screen
Can effective support filter, realize the protection of filter, filter is made using flexible material, can impurity screening and micro-
Grain, the mesh of the first drainage screen is 5-20 mesh.
Further, this filter is to filter continuous or filter cloth.This filter can pass through market purchasing, reduces device
Use cost, improves the ease for use of defecator.Additionally, this filter adopts dismountable design, it is capable of filter
Simple replacing.
Further, filter house also includes the second drainage screen, and this second drainage screen is connected between pressure release portion and fixed part,
Second drainage screen is located inside the first drainage screen, and filter is located between the first drainage screen and the second drainage screen.This structure
Second drainage screen can protect filter further, is prevented from that current are excessive to cause damage to filter.
Further, this fixed part is in circular, and this fixed part includes circular stereosphere and outside stereosphere
Sealant.This stereosphere is used for supporting this filter house, is prevented from the situation that filter house washed away by current and occurs, additionally, this is close
The sealing being designed to realize the sealing of pipeline oral area, strengthening pipeline of sealing, prevents pipeline junction leakage.
Further, this sealant is rubber sealant, and filter house is fixedly connected with steel ring；This steel ring by 1.6 parts of carbon,
0.34 part of vanadium, 1.2 parts of aluminum and 29 parts of ferrum compositions；Rubber sealant include by 43 parts of natural rubbers, 2 parts of flax fibers, 0.5 part
Sulfur, 0.6 part of carbon, 0.59 part of bamboo fibre composition.This rubber sealant has a good sealing effect, feature easy to use, reduces close
The setting difficulty of sealing, improves the service life of sealant.The steel ring of this component has that corrosion-resistant, intensity is high, is unlikely to deform, bullet
Property good feature, the rubber layer of this component has good sealing effect, Stability Analysis of Structures, and elasticity is good, the features such as smooth surface.
Further, the bore in this pressure release portion is the 30-50% of retainer ring bore;This structure being capable of liquid in control pipeline
Flow through filter house flow, coordinate filter house both sides pressure differential.
Further, the inner side in filter house is provided with the flow-disturbing ring of ring-type, and flow-disturbing ring is raised in inside filter house
It is highly 2-3mm.The effect of this flow-disturbing ring is by liquid flow-disturbing, it can be avoided that the impurity in the middle part of liquid in pipeline is directly from letting out
Splenium flows out, and this flow-disturbing ring carries out flow-disturbing to the liquid entering this device it is ensured that the impurity at filter house is uniformly distributed it is ensured that mistake
The effectiveness that filter portion filters.
Further, defecator, valve unit, detector unit are included based on the filtration system of this device and control single
Unit；
The filter house of this defecator includes the first drainage screen, the second drainage screen, filter, this first drainage screen and second
Drainage screen is both connected between pressure release portion and fixed part, and, all in infundibulate, filter is located at for the first drainage screen and the second drainage screen
Inside first drainage screen, the second drainage screen is located inside the first drainage screen, and filter is fixed on the first drainage screen and the second mistake
Between filter screen；Pressure release portion circular tube shaped, pressure release portion is connected to the end of the first drainage screen funnel-shaped structure；Fixed part is in circular,
This fixed part includes circular stereosphere and the sealant rubber sealant outside stereosphere, and filter house is fixing with steel ring even
Connect；
Valve unit includes valve body, screw mechanism and valve driving machine, and valve body is in the form of annular discs to be arranged in pressure release portion, spiral,
Valve driving machine is arranged on the outer wall of pipeline, and the rotating shaft of valve driving machine is connected with valve body by screw mechanism, and valve driving machine passes through
Application valve body rotates the purpose reaching flow-control in pressure release portion；
Detector unit includes the first pressure sensor being arranged on the first drainage screen and is arranged on the second drainage screen
Second pressure sensor；
Control unit includes controller, and this controller is passed with valve driving machine, first pressure sensor and first pressure respectively
Sensor is connected.
This system makes full use of each performance of device it is ensured that filter element effectively improves dress while effective filtration
The availability put and ease for use, the structure of its unit has all been strengthened compared to traditional structure, the making of this device of raising
With the life-span, improve the structural strength of device, and service life, the design of this additional valves unit, real-time control stream can be accomplished
Amount；Additionally, the structure of this structure is simple, easy to use, can quickly realize installation and the replacement of device, additionally, this structure
All parts can be dismantled, and can aid in the convenience of the reduction realizing installation cost and transport, sensed by design in addition
The mode of device, calculates in real time the pressure reduction of drainage screen both sides it is ensured that the accuracy that filters and safety.
Further, the method that defecator filters in the duct is:
Step 1: defecator is installed in pipeline, and coordinates and install valve unit, detector unit and control single
Unit；
Step 2: valve unit is opened to 95-100%, is passed through the current that hydraulic pressure is 300-450 kpa, pipe in the duct
After waterflow stabilization in road, the hydraulic pressure that first pressure sensor measures at the first drainage screen is first pressure value, and second pressure passes
The hydraulic pressure that sensor measures at the second drainage screen is second pressure value；
Step 3: when the ratio of second pressure value and first pressure value is more than 2, controller sends alarm signal；When second
When the ratio of pressure value and first pressure value is 1.7-2, controller sends signal working properly；When second pressure value and the first pressure
When the ratio of force value is 1.5-1.7, controller control valve door motor rotates and opens valve unit to 70-95%；When the second pressure
When the ratio of force value and first pressure value is 1.3-1.5, controller control valve door motor rotates simultaneously to be opened valve unit to 40-
70%；When the ratio of second pressure value and first pressure value is 1.05-1.3, controller control valve door motor rotates and by valve
Gate cell is opened to 5-40%；When the ratio of second pressure value and first pressure value is less than 1.05, valve unit all closes
Close.
Step 4: when the ratio of second pressure value and first pressure value is less than 1.3, controller startup clocking capability, 5 seconds
Afterwards, second pressure value and the ratio of first pressure value are still below 1.3, and controller sends alarm signal.
Said method, the unit of point this structure of transfer, effectively anti-locking apparatus are because the excessive damage causing of pressure differential
Bad, ensure that the safety in utilization of equipment, being designed to of its each specification improves the design effect of device, additionally, the party
Method can be convenient to user this device of reasonable employment, it is to avoid this device uses and do not conform to leakage or the device damage that specification causes,
Improve generalization and the ease for use of device；By way of stage control valve unit, contribute to the accurate control of valve unit
System, it is ensured that the use safety of equipment, improves the transparency in use state for the device, it is to avoid drainage screen is because can't detect a pressure reduction
The too high damage causing, realizes the real-time guard of device.
In sum, due to employing technique scheme, the beneficial effects of the utility model are:
1. this filter house can be conveniently installed at the junction of pipeline, is conducive to the dismounting of pipeline, can reduce pipeline
Interior liquid, for the impact of filter house, alleviates the pressure differential of filter house both sides, thus effectively improving the service life of filter house；
2. due to the design in pressure release portion, this device flow velocity position faster be can be applied to, high flow capacity or high stream realized
The filtration of speed, and the liquid in pipeline need not be carried out with reduction of speed, overcome in prior art and cannot realize in high flow capacity liquid
The defect of filter；
3. the filtration device structure of this device is simply easy to install and use, and is placed in pipeline rather than outside pipeline it is ensured that managing
The aesthetic property of road system, in pipeline junction, this device is recursive to be arranged in same tubing this structure setting, carries
Filtration efficiency.
Brief description
Fig. 1 is the front view of this defecator；
The use state figure of this defecator during Fig. 2.
In figure labelling:: 1- pressure release portion, 2- filter house, 21- first drainage screen, 22- filter, 23- second drainage screen, 3-
Fixed part, 4- first body, 5- second body.
Specific embodiment
Below in conjunction with the accompanying drawings, this utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
Specific embodiment:
As shown in figure 1, a kind of defecator for filter pipeline of the present utility model, including pressure release portion 1, filter house 2
And fixed part 3；Filter house 2 is in infundibulate, and an interface of filter house 2 is connected with fixed part 3, another interface and pressure release portion 1 phase
Even, this fixed part 3 is used for the medial wall of connection pipe body.
This filter house 2 includes the first drainage screen 21 and filter 22, and this first drainage screen 21 is connected to pressure release portion 1 and fixes
Between portion 3, the first drainage screen 21 is in infundibulate, and filter 22 is located inside the first drainage screen 21.First drainage screen 21 can have
Effect supports filter 22, realizes the protection of filter 22, filter 22 is made using flexible material, can impurity screening and micro-
Grain, the mesh of the first drainage screen 21 is 5-20 mesh.This filter 22 is to filter continuous or filter cloth, and filter 22 can pass through city
Field buying, this filter 22 adopts dismountable design, is capable of the simple replacing of filter 22.
Filter house 2 also includes the second drainage screen 23, and this second drainage screen 23 is connected between pressure release portion 1 and fixed part 3, the
Two drainage screens 23 are located inside the first drainage screen 21, and filter 22 is located between the first drainage screen 21 and the second drainage screen 23.
Second drainage screen 23 protection filter 22 simultaneously prevents that current are excessive to cause damage to filter 22.
This fixed part 3 is in circular, and this fixed part 3 includes circular stereosphere and the sealant outside stereosphere.
This steel ring is made up of 1.6 parts of carbon, 0.34 part of vanadium, 1.2 parts of aluminum and 29 parts of ferrum；Rubber sealant include by 43 parts of natural rubbers, 2
Part flax fiber, 0.5 part of sulfur, 0.6 part of carbon, 0.59 part of bamboo fibre composition.This stereosphere is used for supporting this filter house 2, prevents
The sealing being designed to realize the sealing of pipeline oral area, strengthening pipeline of this sealant is washed away by current in filter portion 2.This sealant
For rubber sealant, filter house 2 is fixedly connected with steel ring, and this rubber sealant has a good sealing effect, feature easy to use.
The bore in this pressure release portion 1 is the 30-50% of retainer ring bore;This structure can flow through filtration by liquid in control pipeline
Portion 2 flow, coordinate filter house 2 both sides pressure differential.
It is provided with the flow-disturbing ring of ring-type in the inner side of filter house 2, the height that flow-disturbing ring is raised in filter house 2 inner side is 2-
3mm, this flow-disturbing ring can carry out liquid flow-disturbing, it is to avoid the impurity in the middle part of liquid in pipeline directly flows out it is ensured that mistake from pressure release portion 1
Impurity at filter portion 2 is uniformly distributed and improves the effect filtering.
This defecator removable can be arranged on the junction of pipeline, be conducive to the dismounting of pipeline, and reduce pipeline
Interior liquid, for the impact of filter house 2, alleviates the pressure differential of filter house 2 both sides, improves the service life of filter house 2, this is filled
Put and be applied to flow velocity position faster, realize the filtration of high flow capacity or high flow rate, overcoming cannot be in high flow capacity liquid in prior art
Realize the defect filtering in body, this device be placed in pipeline rather than pipeline outer it is ensured that the aesthetic property of tubing, this structure setting
In pipeline junction, recursive be arranged in same tubing, improve filter efficiency.
This utility model, when using, defecator is installed in the porch of the first body 4, and defecator is placed in
Inside filter, the oral area of sub first body 4 that fixed part 3 is fitted, it is to avoid defecator slides along the first body 4, then
Second body 5 is connected with the first body 4, and defecator is sealed in the first body 4 and the second body 5, incited somebody to action simultaneously
Filter device is fixed on the first body 4 and the junction of the second body 5, when liquid flows into the first body 4 from the second body 5, liquid
A part for body, after filter house 2 filtration, enters the first body 4, and another part flows into the first body 4, pressure release from pressure release portion 1
Portion 1 can effectively ensure that filter house 2 pressure at both sides difference, less than the pressure scope of filter house 2, effectively realizes the guarantor of filter house 2
Shield, ensures normal filtration simultaneously；When in pipeline, current increase suddenly, the part pressure release that pressure can be exceeded by pressure release portion 1, keeps away
Exempt from filter house 2 overvoltage impact filter quality.
Embodiment 2
Based on defecator disclosed in embodiment 1, its filtration system include defecator, valve unit, detector unit and
Control unit；
The filter house of this defecator includes the first drainage screen, the second drainage screen, filter, this first drainage screen and second
Drainage screen is both connected between pressure release portion and fixed part, and, all in infundibulate, filter is located at for the first drainage screen and the second drainage screen
Inside first drainage screen, the second drainage screen is located inside the first drainage screen, and filter is fixed on the first drainage screen and the second mistake
Between filter screen；Pressure release portion circular tube shaped, pressure release portion is connected to the end of the first drainage screen funnel-shaped structure；Fixed part is in circular,
This fixed part includes circular stereosphere and the sealant rubber sealant outside stereosphere, and filter house is fixing with steel ring even
Connect；
Valve unit includes valve body, screw mechanism and valve driving machine, and valve body is in the form of annular discs to be arranged in pressure release portion, spiral,
Valve driving machine is arranged on the outer wall of pipeline, and the rotating shaft of valve driving machine is connected with valve body by screw mechanism, and valve driving machine passes through
Application valve body rotates the purpose reaching flow-control in pressure release portion；
Detector unit includes the first pressure sensor being arranged on the first drainage screen and is arranged on the second drainage screen
Second pressure sensor；
Control unit includes controller, and this controller is passed with valve driving machine, first pressure sensor and first pressure respectively
Sensor is connected.
This system makes full use of each performance of device it is ensured that filter element effectively improves dress while effective filtration
The availability put and ease for use, the structure of its unit has all been strengthened compared to traditional structure, the making of this device of raising
With the life-span, improve the structural strength of device, and service life, the design of this additional valves unit, real-time control stream can be accomplished
Amount；Additionally, the structure of this structure is simple, easy to use, can quickly realize installation and the replacement of device, additionally, this structure
All parts can be dismantled, and can aid in the convenience of the reduction realizing installation cost and transport, sensed by design in addition
The mode of device, calculates in real time the pressure reduction of drainage screen both sides it is ensured that the accuracy that filters and safety.
Embodiment 3
Based on defecator and filtration system disclosed in embodiment 2, the method that defecator filters in the duct is:
Step 1: defecator is installed in pipeline, and coordinates and install valve unit, detector unit and control single
Unit；
Step 2: valve unit is opened to 95-100%, is passed through the current that hydraulic pressure is 300-450 kpa, pipe in the duct
After waterflow stabilization in road, the hydraulic pressure that first pressure sensor measures at the first drainage screen is first pressure value, and second pressure passes
The hydraulic pressure that sensor measures at the second drainage screen is second pressure value；
Step 3: when the ratio of second pressure value and first pressure value is more than 2, controller sends alarm signal；When second
When the ratio of pressure value and first pressure value is 1.7-2, controller sends signal working properly；When second pressure value and the first pressure
When the ratio of force value is 1.5-1.7, controller control valve door motor rotates and opens valve unit to 70-95%；When the second pressure
When the ratio of force value and first pressure value is 1.3-1.5, controller control valve door motor rotates simultaneously to be opened valve unit to 40-
70%；When the ratio of second pressure value and first pressure value is 1.05-1.3, controller control valve door motor rotates and by valve
Gate cell is opened to 5-40%；When the ratio of second pressure value and first pressure value is less than 1.05, valve unit all closes
Close.
Step 4: when the ratio of second pressure value and first pressure value is less than 1.3, controller startup clocking capability, 5 seconds
Afterwards, second pressure value and the ratio of first pressure value are still below 1.3, and controller sends alarm signal.
Said method, the unit of point this structure of transfer, effectively anti-locking apparatus are because the excessive damage causing of pressure differential
Bad, ensure that the safety in utilization of equipment, being designed to of its each specification improves the design effect of device, additionally, the party
Method can be convenient to user this device of reasonable employment, it is to avoid this device uses and do not conform to leakage or the device damage that specification causes,
Improve generalization and the ease for use of device；By way of stage control valve unit, contribute to the accurate control of valve unit
System, it is ensured that the use safety of equipment, improves the transparency in use state for the device, it is to avoid drainage screen is because can't detect a pressure reduction
The too high damage causing, realizes the real-time guard of device.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this
Any modification, equivalent and improvement made within the spirit of utility model and principle etc., should be included in this utility model
Protection domain within.
Claims (8)
1. a kind of defecator for filter pipeline is it is characterised in that include pressure release portion (1), filter house (2) and fixed part
(3)；Filter house (2) is in infundibulate, and an interface of filter house (2) is connected with fixed part (3), another interface and pressure release portion (1)
It is connected, this fixed part (3) is used for the medial wall of connection pipe body.
2. it is used for the defecator of filter pipeline as claimed in claim 1 it is characterised in that this filter house (2) includes first
Drainage screen (21) and filter (22), this first drainage screen (21) is connected between pressure release portion (1) and fixed part (3), the first mistake
Filter screen (21) is in infundibulate, and filter (22) is located inside the first drainage screen (21).
3. it is used for the defecator of filter pipeline as claimed in claim 2 it is characterised in that this filter (22) is to filter silk floss
Or filter cloth.
4. it is used for the defecator of filter pipeline as claimed in claim 2 it is characterised in that filter house (2) also includes second
Drainage screen (23), this second drainage screen (23) is connected between pressure release portion (1) and fixed part (3), and the second drainage screen (23) is located at
Inside first drainage screen (21), and filter (22) is located between the first drainage screen (21) and the second drainage screen (23).
5. it is used for the defecator of filter pipeline as claimed in claim 1 it is characterised in that this fixed part (3) is in circular,
This fixed part (3) includes circular stereosphere and the sealant outside stereosphere.
6. it is used for the defecator of filter pipeline as claimed in claim 5 it is characterised in that this sealant is rubber seal
Layer, filter house (2) is fixedly connected with steel ring；This steel ring is made up of 1.6 parts of carbon, 0.34 part of vanadium, 1.2 parts of aluminum and 29 parts of ferrum；Rubber
Sealant includes being made up of 43 parts of natural rubbers, 2 parts of flax fibers, 0.5 part of sulfur, 0.6 part of carbon, 0.59 part of bamboo fibre.
7. it is used for the defecator of filter pipeline as claimed in claim 1 it is characterised in that the bore in this pressure release portion (1) is
The 30-50% of retainer ring bore.
8. it is used for the defecator of filter pipeline as claimed in claim 1 it is characterised in that setting in the inner side of filter house (2)
It is equipped with the flow-disturbing ring of ring-type, the height that flow-disturbing ring is raised in inside filter house (2) is 2-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620510021.2U CN205913836U (en) | 2016-05-31 | 2016-05-31 | A filter equipment for pipe filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620510021.2U CN205913836U (en) | 2016-05-31 | 2016-05-31 | A filter equipment for pipe filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205913836U true CN205913836U (en) | 2017-02-01 |
Family
ID=57876525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620510021.2U Expired - Fee Related CN205913836U (en) | 2016-05-31 | 2016-05-31 | A filter equipment for pipe filters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205913836U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854374A (en) * | 2016-05-31 | 2016-08-17 | 张荣斌 | Filtering device used for pipeline filtering |
| CN107638757A (en) * | 2017-10-25 | 2018-01-30 | 陈琪雯 | A kind of environment-protecting type exhaust air purification pipe |
-
2016
- 2016-05-31 CN CN201620510021.2U patent/CN205913836U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854374A (en) * | 2016-05-31 | 2016-08-17 | 张荣斌 | Filtering device used for pipeline filtering |
| CN107638757A (en) * | 2017-10-25 | 2018-01-30 | 陈琪雯 | A kind of environment-protecting type exhaust air purification pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170201 Termination date: 20170531 |