CN104399290B - A kind of sewage purification and automatic back-washing blowdown apparatus - Google Patents
A kind of sewage purification and automatic back-washing blowdown apparatus Download PDFInfo
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- CN104399290B CN104399290B CN201410718099.9A CN201410718099A CN104399290B CN 104399290 B CN104399290 B CN 104399290B CN 201410718099 A CN201410718099 A CN 201410718099A CN 104399290 B CN104399290 B CN 104399290B
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Abstract
The present invention relates to a kind of sewage purification and automatic back-washing blowdown apparatus, be mainly used in purifying waste water, comprise influent hopper, antisyphonage pipe and positive siphon pipe; Floating valve door gear is provided with bottom influent hopper; Be communicated with antisyphonage pipe descending branch top bottom influent hopper, it is antisyphonage pipe precipitating phase bottom antisyphonage pipe, antisyphonage pipe precipitating phase two ends are communicated with antisyphonage pipe descending branch and antisyphonage pipe ascent stage respectively, the other end of antisyphonage pipe ascent stage is communicated with antisyphonage pipe water exit end, be communicated with by intermediate conduit between antisyphonage pipe descending branch and antisyphonage pipe ascent stage, be provided with the first waterpower valve device in intermediate conduit, the bottom in antisyphonage pipe descending branch is provided with the second waterpower valve device; Positive syphon mouth section one end is communicated with the middle part sidewall of antisyphonage pipe descending branch, the other end is communicated with the positive siphon pipe ascent stage, the other end of positive siphon pipe ascent stage is communicated with positive siphon pipe water exit end, is provided with filter in positive syphon mouth section, and antisyphonage pipe peak is higher than positive siphon pipe peak.
Description
Technical field
The present invention relates to the processing technology field of water, waste water, sewage or mud, especially a kind of sewage purification and automatic back-washing blowdown apparatus.
Background technology
Eel, in the breeding process of soft-shelled turtle, under intensive culture condition, in breeding wastewater, the suspended state organic dirt such as remaining residual bait and aquaculture organism excreta is maximum to water pollution, the work that the blowdown operation cultivating workman every day has just become centralization-breeding factory one required and important, in most cases cultivating workman will descend culturing pool to carry out blowdown operation, this certainly will cause agitation and injury to cultured fishes, simultaneously, the number of times of blowdown every day is limited, in time culturing pool suspended state organic dirt can not be discharged, and water turbidity is increased, dissolved oxygen in water is consumed in a large number, cause COD, biochemical oxygen demand (BOD), ammonia nitrogen, the indexs such as total nitrogen raise, cultivation water is worsened, therefore, necessaryly design a kind of sewage purification and automatic back-washing blowdown apparatus, culturing pool suspended state SOLID ORGANIC dirt can be isolated in time, reclaim clean aquaculture water to recycle.
In existing sewage purification system, most structure all more complicated, thus cause installation and maintenance more difficult, with high costs; And in existing sewage purification system, not possessing the function of automatic fitration, automatic back-washing blowdown yet, the scope of application is little.
Floating valve door gear described in technical scheme of the present invention comprises a solid ball float, and solid ball float connects a hollow float by pole, and the pipeline internal fixtion of solid ball float and hollow float diameter is provided with and blocks ball bar plate; When sewage enters influent hopper, hollow float can rise along with the rising of wastewater level, and hollow float pulls solid ball float to rise to the position of blocking ball bar plate by pole namely to stop, and now namely influent hopper is opened and discharged water.
Described waterpower valve device comprises a two-way funnel, a solid ball float and one block ball bar plate; Described two-way funnel is spliced by the hopper outlet of two funnels; In one end of two-way funnel, solid ball float is set, this one end is defined as the switch terminals of waterpower valve device, pipeline internal fixtion in switch terminals side arranges and blocks ball bar plate, and blocking ball bar plate range switch end has certain distance, is blocked dead in case switch terminals blocks ball bar plate and does not open; The other end of two-way funnel is the water inlet end of waterpower valve device, and when water passes through waterpower valve device from water inlet end, solid ball float departs from two-way funnel, then switch terminals is opened, when water passes through waterpower valve device from switch terminals is reverse, two-way funnel is blocked by solid ball float, then switch terminals is closed.
Summary of the invention
The invention provides a kind of sewage purification and automatic back-washing blowdown apparatus, the problem that technical problem to be solved is complex structure in existing sewage purification system, with high costs and the scope of application is little.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of sewage purification and automatic back-washing blowdown apparatus, comprises influent hopper, antisyphonage pipe and positive siphon pipe, described antisyphonage pipe comprises antisyphonage pipe descending branch, antisyphonage pipe precipitating phase, antisyphonage pipe ascent stage and antisyphonage pipe water exit end, described positive siphon pipe comprises positive syphon mouth section, positive siphon pipe ascent stage and positive siphon pipe water exit end, the bottom of described influent hopper is provided with floating valve door gear, the outlet at bottom of described influent hopper is communicated with the top of described antisyphonage pipe descending branch, the bottom of described antisyphonage pipe descending branch is communicated with one end of described antisyphonage pipe precipitating phase, the other end of described antisyphonage pipe precipitating phase is communicated with the bottom of described antisyphonage pipe ascent stage, the top of described antisyphonage pipe ascent stage is communicated with described antisyphonage pipe water exit end, described antisyphonage pipe descending branch is communicated with by intermediate conduit with between the antisyphonage pipe ascent stage, the inside of described intermediate conduit is provided with the first waterpower valve device, the switch terminals of described first waterpower valve device is located at the side of the close described antisyphonage pipe descending branch in described intermediate conduit, the arrival end of described positive syphon mouth section is communicated with the middle part sidewall of described antisyphonage pipe descending branch, the other end of described positive syphon mouth section is communicated with the bottom of described positive siphon pipe ascent stage, the top of described positive siphon pipe ascent stage is communicated with described positive siphon pipe water exit end, is provided with filter in described positive syphon mouth section, bottom in described antisyphonage pipe descending branch is provided with the second waterpower valve device, and the switch terminals of described second waterpower valve device is located at the side of the close described antisyphonage pipe precipitating phase in described antisyphonage pipe descending branch, the position of described second waterpower valve device is lower than the position of the described positive syphon mouth section in described antisyphonage pipe descending branch and described intermediate conduit, the peak of described antisyphonage pipe is higher than described just siphonal peak.
The invention has the beneficial effects as follows: the present invention can isolate culturing pool suspended state SOLID ORGANIC dirt in time, reclaim clean aquaculture water and recycled, finally realize effective blowdown, purify water, save the object of breeding water; The present invention adopts siphon principle to have the function of automatic fitration purification and automatic back-washing blowdown, and construction installation is simple, easy to maintenance, construction cost is cheap, applied widely, easily promote the use of aborning, and stable performance, be applicable to the mechanical filter operation of various sewage, under the condition not needing any power, rely on siphonage power, just can realize automatic fitration through filter, purify water, isolate clean water; Also rely on the active force of siphon to carry out automatic back-washing blowdown operation to filter simultaneously, discharge solid dirt, and cleaned filter screen and water treatment filter material, ensure automatic fitration next time and the operation that purifies water.Therefore, the present invention can be widely used in the place such as aquatic products and livestock and poultry farm, industrial enterprise, Agricultural Park, city tap-water factory, rural well water, sewage treatment plant and methane-generating pit, carry out the process of breeding wastewater, industrial circulating water, irrigation water, domestic water, former water and sewage, week and carry out the detached job of solid dirt and water of beginning automatically to carry out, discharge solid dirt, isolate clean water, and automatic cleaned filter screen and water treatment filter material.
On the basis of technique scheme, the present invention can also do following improvement.
Further, the described positive siphon pipe ascent stage is provided with water storage ball.
Adopt the beneficial effect of above-mentioned further scheme to be carry out siphon operation when antisyphonage pipe, when carrying out blowdown cleaning to filter and antisyphonage pipe, the water in water storage ball can ensure more sufficiently for cleaning and filtrating equipment.
Further, described intermediate conduit is corresponding in the position of described antisyphonage pipe descending branch with described positive syphon mouth section in the position of described antisyphonage pipe descending branch.
Adopt the beneficial effect of above-mentioned further scheme to be that the positive syphon mouth section place that intermediate conduit is mainly used in the sewage being positioned at more than intermediate conduit in the antisyphonage pipe ascent stage to be discharged to antisyphonage pipe descending branch carries out filtering, evolving, reach the object of effluent cycle being filtered; And position intermediate conduit be arranged on corresponding to positive syphon mouth section is more conducive to accelerating filter efficiency.
Further, described filter comprises internal layer screen pack and outer filter net, and described internal layer screen pack is arranged on the inletpiston place of described positive syphon mouth section, and described outer filter net is arranged in described positive syphon mouth section; Water treatment filter material is filled with between described internal layer screen pack and described outer filter net.
Adopt the beneficial effect of above-mentioned further scheme be adopt multiple layers of filters, make filter and clean-up effect better.
Further, described floating valve door gear comprises the first solid ball float and hollow float, described hollow float is positioned at the top of described first solid ball float, described first solid ball float is connected with described hollow float by pole, is fixedly installed first and blocks ball bar plate between described first solid ball float and hollow float; Described first solid ball float in described floating valve door gear is located at the bottom of described influent hopper, and the diameter of described first solid ball float is greater than the outlet at bottom diameter of described influent hopper.
Further, described first waterpower valve device comprises the first two-way funnel, the second solid ball float and second blocks ball bar plate; Described first two-way funnel is horizontally set in described intermediate conduit, described second solid ball float is located at described first two-way funnel near one end of described antisyphonage pipe descending branch, this end is the switch terminals of described first waterpower valve device, and described second blocks ball bar plate is fixedly installed in the described intermediate conduit of the switch terminals side of described first waterpower valve device; The diameter of described second solid ball float is greater than the narrowest cross-sectional diameter of described first two-way funnel.
Further, described second waterpower valve device comprises the second two-way funnel, the 3rd solid ball float and the 3rd blocks ball bar plate; Described second two-way funnel is longitudinally arranged at the bottom in described antisyphonage pipe descending branch, described 3rd solid ball float is located at described second two-way funnel near one end of described antisyphonage pipe precipitating phase, this end is the switch terminals of described second waterpower valve device, and the described 3rd blocks ball bar plate is fixedly installed in the described antisyphonage pipe descending branch of the side of the switch terminals of described second waterpower valve device; The diameter of described 3rd solid ball float is greater than the narrowest cross-sectional diameter of described second two-way funnel.
The beneficial effect of above-mentioned further scheme is adopted to be achieve automatic control switch function to floating valve door gear and waterpower valve device by the effect of hollow float and solid ball float buoyancy.
Further, described positive syphon mouth section is fixed on the middle part sidewall of described antisyphonage pipe descending branch by set bolt.
The beneficial effect of above-mentioned further scheme is adopted to be make installation and maintenance convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
In accompanying drawing, the list of parts representated by each label is as follows:
1, influent hopper, 2, antisyphonage pipe descending branch, 3, antisyphonage pipe precipitating phase, 4, the antisyphonage pipe ascent stage, 5, antisyphonage pipe water exit end, 6, positive syphon mouth section, 7, the positive siphon pipe ascent stage, 8, positive siphon pipe water exit end, 9, intermediate conduit, 10, water storage ball, 11, internal layer screen pack, 12, outer filter net, 13, water treatment filter material, 14, first solid ball float, 15, hollow float, 16, pole, 17, first blocks ball bar plate, 18, first two-way funnel, 19, second solid ball float, 20, second blocks ball bar plate, 21, second two-way funnel, 22, 3rd solid ball float, 23, 3rd blocks ball bar plate, 24, set bolt.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
In a detailed description of the invention, as shown in Figure 1, a kind of sewage purification and automatic back-washing blowdown apparatus, comprise influent hopper 1, antisyphonage pipe and positive siphon pipe, described antisyphonage pipe comprises antisyphonage pipe descending branch 2, antisyphonage pipe precipitating phase 3, antisyphonage pipe ascent stage 4 and antisyphonage pipe water exit end 5, described positive siphon pipe comprises positive syphon mouth section 6, positive siphon pipe ascent stage 7 and positive siphon pipe water exit end 8, the bottom of described influent hopper 1 is provided with floating valve door gear, the outlet at bottom of described influent hopper 1 is communicated with the top of described antisyphonage pipe descending branch 2, the bottom of described antisyphonage pipe descending branch 2 is communicated with one end of described antisyphonage pipe precipitating phase 3, the other end of described antisyphonage pipe precipitating phase 3 is communicated with the bottom of described antisyphonage pipe ascent stage 4, the top of described antisyphonage pipe ascent stage 4 is communicated with described antisyphonage pipe water exit end 5, described antisyphonage pipe descending branch 2 is communicated with by intermediate conduit 9 with between the antisyphonage pipe ascent stage 4, the inside of described intermediate conduit 9 is provided with the first waterpower valve device, the switch terminals of described first waterpower valve device is located at the side of the close described antisyphonage pipe descending branch 2 in described intermediate conduit 9, the arrival end of described positive syphon mouth section 6 is communicated with the middle part sidewall of described antisyphonage pipe descending branch 2, the other end of described positive syphon mouth section 6 is communicated with the bottom of described positive siphon pipe ascent stage 7, the top of described positive siphon pipe ascent stage 7 is communicated with described positive siphon pipe water exit end 8, is provided with filter in described positive syphon mouth section 6, bottom in described antisyphonage pipe descending branch 2 is provided with the second waterpower valve device, and the switch terminals of described second waterpower valve device is located at the side of the close described antisyphonage pipe precipitating phase 3 in described antisyphonage pipe descending branch 2, the position of described second waterpower valve device is lower than the position of the described positive syphon mouth section 6 in described antisyphonage pipe descending branch 2 and described intermediate conduit 9, the peak of described antisyphonage pipe is higher than described just siphonal peak.
The described positive siphon pipe ascent stage 7 is provided with water storage ball 10.When antisyphonage pipe carries out siphon operation, when carrying out blowdown cleaning to filter and antisyphonage pipe, the water that water storage ball is 10 li can ensure more sufficiently for cleaning and filtrating equipment.
Described intermediate conduit 9 is corresponding in the position of described antisyphonage pipe descending branch 2 with described positive syphon mouth section 6 in the position of described antisyphonage pipe descending branch 2.Positive syphon mouth section 6 place that intermediate conduit 9 is mainly used in the sewage being positioned at intermediate conduit more than 9 in the antisyphonage pipe ascent stage 4 to be discharged to antisyphonage pipe descending branch 2 carries out filtering, evolving, reaches the object of effluent cycle being filtered; And position intermediate conduit 9 be arranged on corresponding to positive syphon mouth section 6 is more conducive to accelerating filter efficiency.
Described filter comprises internal layer screen pack 11 and outer filter net 12, and described internal layer screen pack 11 is arranged on the inletpiston place of described positive syphon mouth section 6, and described outer filter net 12 is arranged in described positive syphon mouth section 6; Water treatment filter material 13 is filled with between described internal layer screen pack 11 and described outer filter net 12.Adopt multiple layers of filters, make filter and clean-up effect better.
Described floating valve door gear comprises the first solid ball float 14 and hollow float 15, described hollow float 15 is positioned at the top of described first solid ball float 14, described first solid ball float 14 is connected with described hollow float 15 by pole 16, is fixedly installed first and blocks ball bar plate 17 between described first solid ball float 14 and hollow float 15; Described first solid ball float 14 in described floating valve door gear is located at the bottom of described influent hopper 1, and the diameter of described first solid ball float 14 is greater than the outlet at bottom diameter of described influent hopper 1.
Described first waterpower valve device comprises the first solid ball float 19 of two-way funnel 18, second and second and blocks ball bar plate 20; Described first two-way funnel 18 is horizontally set in described intermediate conduit 9, described second solid ball float 19 is located at described first two-way funnel 18 near one end of described antisyphonage pipe descending branch 2, this end is the switch terminals of described first waterpower valve device, and described second blocks ball bar plate 20 is fixedly installed in the described intermediate conduit 9 of the switch terminals side of described first waterpower valve device; The diameter of described second solid ball float 19 is greater than the narrowest cross-sectional diameter of described first two-way funnel 18.
Described second waterpower valve device comprises the second two-way funnel 21, the 3rd solid ball float 22 and the 3rd blocks ball bar plate 23; Described second two-way funnel 21 is longitudinally arranged at the bottom in described antisyphonage pipe descending branch 2, described 3rd solid ball float 22 is located at described second two-way funnel 21 near one end of described antisyphonage pipe precipitating phase 3, this end is the switch terminals of described second waterpower valve device, and the described 3rd blocks ball bar plate 23 is fixedly installed in the described antisyphonage pipe descending branch 2 of the side of the switch terminals of described second waterpower valve device; The diameter of described 3rd solid ball float 22 is greater than the narrowest cross-sectional diameter of described second two-way funnel 21.
The automatic control switch function to floating valve door gear and waterpower valve device is achieved by the effect of hollow float 15 and solid ball float buoyancy.
Described positive syphon mouth section 6 is fixed on the middle part sidewall of described antisyphonage pipe descending branch 2 by set bolt 24, makes installation and maintenance convenient.
Operation principle of the present invention is that sewage enters in influent hopper 1 by sewage inlet filling, when sewage is filled into a certain amount of, hollow float 15 in influent hopper 1 can rise along with the rising of sewage level, then hollow float 15 drives the first solid ball float 14 to rise to first and blocks the stopping of ball bar plate 17 place, now influent hopper 1 is opened and sewage is put into antisyphonage pipe, now the second waterpower valve device is what open, when the sewage level in antisyphonage pipe rises to positive syphon mouth section 6 place, filter starts filter sewage, purifying waste water after filtering starts to pour into positive siphon pipe ascent stage 7 and water storage ball 10, when the liquid level of purifying waste water arrive just siphonal peak time, positive siphon pipe starts to carry out siphon operation, now, floating valve door gear and the second waterpower valve device are closed gradually owing to being subject to just siphonal siphonage power, first waterpower valve device is then opened, positive siphon pipe starts to filter antisyphonage pipe descending branch 2 and the sewage in the antisyphonage pipe ascent stage 4, after the sewage in antisyphonage pipe these two sections is filtered sky, air can be entered in two sections of antisyphonage pipes, the now just siphonal siphon termination of job, then sewage filling is re-started, circulation said process, when filter is after recycling repeatedly, internal layer screen pack 11, outer filter net 12 and water treatment filter material 13 can be blocked by solid dirt gradually, filter capacity is caused to decline, just siphonal operation process can not normally carry out, but purify waste water and can be stored in water storage ball 10, meanwhile, along with the continuous filling of sewage, the sewage level of antisyphonage pipe can rise gradually, when sewage level arrives the peak of antisyphonage pipe, antisyphonage pipe starts siphon operation, now, floating valve door gear and the first waterpower valve device are closed gradually owing to being subject to the siphonage power of antisyphonage pipe, second waterpower valve device is then opened, purifying waste water in water storage ball 10 can flow to filter by the siphonage power of antisyphonage pipe, and then backwash is carried out to filter, dirt after flushing is by antisyphonage pipe precipitating phase 3 and discharged by antisyphonage pipe water exit end 5 in the lump by the sediment in antisyphonage pipe precipitating phase 3.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. sewage purification and an automatic back-washing blowdown apparatus, is characterized in that, comprises influent hopper (1), antisyphonage pipe and positive siphon pipe, described antisyphonage pipe comprises antisyphonage pipe descending branch (2), antisyphonage pipe precipitating phase (3), antisyphonage pipe ascent stage (4) and antisyphonage pipe water exit end (5), described positive siphon pipe comprises positive syphon mouth section (6), positive siphon pipe ascent stage (7) and positive siphon pipe water exit end (8), the bottom of described influent hopper (1) is provided with floating valve door gear, the outlet at bottom of described influent hopper (1) is communicated with the top of described antisyphonage pipe descending branch (2), the bottom of described antisyphonage pipe descending branch (2) is communicated with one end of described antisyphonage pipe precipitating phase (3), the other end of described antisyphonage pipe precipitating phase (3) is communicated with the bottom of described antisyphonage pipe ascent stage (4), the top of described antisyphonage pipe ascent stage (4) is communicated with described antisyphonage pipe water exit end (5), described antisyphonage pipe descending branch (2) is communicated with by intermediate conduit (9) with between the antisyphonage pipe ascent stage (4), the inside of described intermediate conduit (9) is provided with the first waterpower valve device, the switch terminals of described first waterpower valve device is located at the side of the close described antisyphonage pipe descending branch (2) in described intermediate conduit (9), the arrival end of described positive syphon mouth section (6) is communicated with the middle part sidewall of described antisyphonage pipe descending branch (2), the other end of described positive syphon mouth section (6) is communicated with the bottom of described positive siphon pipe ascent stage (7), the top of described positive siphon pipe ascent stage (7) is communicated with described positive siphon pipe water exit end (8), is provided with filter in described positive syphon mouth section (6), bottom in described antisyphonage pipe descending branch (2) is provided with the second waterpower valve device, and the switch terminals of described second waterpower valve device is located at the side of the close described antisyphonage pipe precipitating phase (3) in described antisyphonage pipe descending branch (2), the position of described second waterpower valve device is lower than the position of the described positive syphon mouth section (6) on described antisyphonage pipe descending branch (2) and described intermediate conduit (9), the peak of described antisyphonage pipe is higher than described just siphonal peak.
2. a kind of sewage purification and automatic back-washing blowdown apparatus according to claim 1, is characterized in that, described positive siphon pipe ascent stage (7) is provided with water storage ball (10).
3. a kind of sewage purification and automatic back-washing blowdown apparatus according to claim 1, it is characterized in that, described intermediate conduit (9) is corresponding in the position of described antisyphonage pipe descending branch (2) with described positive syphon mouth section (6) in the position of described antisyphonage pipe descending branch (2).
4. a kind of sewage purification and automatic back-washing blowdown apparatus according to claim 1, it is characterized in that, described filter comprises internal layer screen pack (11) and outer filter net (12), described internal layer screen pack (11) is arranged on the inletpiston place of described positive syphon mouth section (6), and described outer filter net (12) is arranged in described positive syphon mouth section (6); Water treatment filter material (13) is filled with between described internal layer screen pack (11) and described outer filter net (12).
5. a kind of sewage purification and automatic back-washing blowdown apparatus according to any one of Claims 1-4, it is characterized in that, described floating valve door gear comprises the first solid ball float (14) and hollow float (15), described hollow float (15) is positioned at the top of described first solid ball float (14), described first solid ball float (14) is connected with described hollow float (15) by pole (16), is fixedly installed first and blocks ball bar plate (17) between described first solid ball float (14) and hollow float (15); Described first solid ball float (14) in described floating valve door gear is located at the bottom of described influent hopper (1), and the diameter of described first solid ball float (14) is greater than the outlet at bottom diameter of described influent hopper (1).
6. a kind of sewage purification and automatic back-washing blowdown apparatus according to any one of Claims 1-4, it is characterized in that, described first waterpower valve device comprises the first two-way funnel (18), the second solid ball float (19) and second blocks ball bar plate (20); Described first two-way funnel (18) is horizontally set in described intermediate conduit (9), described second solid ball float (19) is located at described first two-way funnel (18) one end near described antisyphonage pipe descending branch (2), this end is the switch terminals of described first waterpower valve device, and described second blocks ball bar plate (20) is fixedly installed in the described intermediate conduit (9) of the switch terminals side of described first waterpower valve device; The diameter of described second solid ball float (19) is greater than the narrowest cross-sectional diameter of described first two-way funnel (18).
7. a kind of sewage purification and automatic back-washing blowdown apparatus according to any one of Claims 1-4, it is characterized in that, described second waterpower valve device comprises the second two-way funnel (21), the 3rd solid ball float (22) and the 3rd blocks ball bar plate (23); Described second two-way funnel (21) is longitudinally arranged at the bottom in described antisyphonage pipe descending branch (2), described 3rd solid ball float (22) is located at described second two-way funnel (21) one end near described antisyphonage pipe precipitating phase (3), this end is the switch terminals of described second waterpower valve device, and the described 3rd blocks ball bar plate (23) is fixedly installed in the described antisyphonage pipe descending branch (2) of the side of the switch terminals of described second waterpower valve device; The diameter of described 3rd solid ball float (22) is greater than the narrowest cross-sectional diameter of described second two-way funnel (21).
8. a kind of sewage purification and automatic back-washing blowdown apparatus according to any one of Claims 1-4, it is characterized in that, described positive syphon mouth section (6) is fixed on the middle part sidewall of described antisyphonage pipe descending branch (2) by set bolt (24).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410718099.9A CN104399290B (en) | 2014-12-01 | 2014-12-01 | A kind of sewage purification and automatic back-washing blowdown apparatus |
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| CN201410718099.9A CN104399290B (en) | 2014-12-01 | 2014-12-01 | A kind of sewage purification and automatic back-washing blowdown apparatus |
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| CN104399290B true CN104399290B (en) | 2016-03-23 |
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