CN204099912U - Positive/negative pressure protector - Google Patents
Positive/negative pressure protector Download PDFInfo
- Publication number
- CN204099912U CN204099912U CN201420550615.7U CN201420550615U CN204099912U CN 204099912 U CN204099912 U CN 204099912U CN 201420550615 U CN201420550615 U CN 201420550615U CN 204099912 U CN204099912 U CN 204099912U
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- China
- Prior art keywords
- ftercompction
- pipeline
- casing
- pressure
- positive
- 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 - Lifetime
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- 230000001012 protector Effects 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 230000007306 turnover Effects 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000007423 decrease Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005056 compaction Methods 0.000 description 3
- 238000000855 fermentation Methods 0.000 description 3
- 230000004151 fermentation Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Tents Or Canopies (AREA)
Abstract
The utility model is specifically related to the improvement of positive/negative pressure protector.Object is to provide the little positive/negative pressure protector of a kind of breakout pressure, comprise the casing with upper and lower two chambers, the upper chamber of casing and lower chambers are by the channel connection vertically arranged, and be provided with the pressure relief plate it being formed to sealing on the top of passage, pressure relief plate is formed hinged in side and passage; Casing is provided with for connecting open to atmosphere relief pipeline, relief pipeline is communicated with upper chamber; Casing is provided with the turnover feed channel for being communicated with biogas main pipeline, turnover feed channel is communicated with lower chambers; The open to atmosphere ftercompction pipeline of the company of being provided with on casing, ftercompction pipeline communication lower chambers, ftercompction pipeline and be provided with between lower chambers the ftercompction plate sealed formed to ftercompction pipeline, ftercompction plate is vertically arranged, and is formed hinged on top and ftercompction pipeline.The utility model structure is simple, adopts anhydrous design, low voltage starting, does not affect by temperature, can play positive/negative-pressure protection effectively to fermenting tub, gas storage holder and pipe-line system.
Description
Technical field
The utility model belongs to bionethanation system pressure protective device, is specifically related to the improvement of positive/negative pressure protector.
Background technique
Biogas production industry, no matter in marsh-gas fermentation tank, gas storage holder or pipe-line system, all needs set the protection pressure release value of malleation and avoid the generation of negative pressure, and the system of protection generally regards positive pressure protection or negative pressure protection with water seal.When marsh-gas fermentation tank, gas storage holder or pipe-line system pressure are lower than certain value, negative-pressure balancing can be fallen by outlet pipe suck air by system, when marsh-gas fermentation tank, gas storage holder or pipe-line system pressure are lower than certain value, system is discharged biogas and is carried out pressure release, ensures equipment security of operation.But such protective system has a common fault: when temperature is lower than 0 DEG C, water will freeze, thus loses protective action.
In addition, also have other modes of various employing to carry out the pressure guard of positive/negative-pressure protection on the market, but this kind of protector for pressure-activated value general all higher.The such as patent No. be 201120478597.2 utility model patent disclose a kind of piston type positive/negative pressure protector; arrange positive-pressure protecting device and negative-pressure protection device respectively, the change being slided up and down the piston position of generation by air pressure promotion piston in urceolus realizes positive/negative-pressure protection.The structure of positive-pressure protecting device and negative-pressure protection device must be provided separately by this positive/negative pressure protector, could realize its function, and can not realize positive/negative-pressure protection integrated setting, the cost of production, installation and maintenance is higher.
Model utility content
The purpose of this utility model is to provide the little positive/negative pressure protector of a kind of breakout pressure, can play positive/negative-pressure protection effectively to fermenting tub, gas storage holder and pipe-line system.
For realizing above-mentioned model utility object, the technological scheme that the utility model adopts is: a kind of positive/negative pressure protector, comprise the casing with upper and lower two chambers, the upper chamber of described casing and lower chambers are by the channel connection vertically arranged, be provided with the pressure relief plate it being formed to sealing on the top of passage, pressure relief plate is formed hinged in side and passage;
Described casing is provided with for connecting open to atmosphere relief pipeline, described relief pipeline is communicated with the upper chamber of casing;
Described casing is provided with the turnover feed channel for being communicated with biogas main pipeline, described turnover feed channel is communicated with the lower chambers of casing;
The open to atmosphere ftercompction pipeline of the company of being provided with on described casing, the lower chambers of described ftercompction pipeline communication casing, described ftercompction pipeline and be provided with between lower chambers the ftercompction plate sealed formed to ftercompction pipeline, described ftercompction plate is vertically arranged, and is formed hinged on top and ftercompction pipeline.
Preferred: described pressure relief plate is provided with dismountable balancing weight, the balancing weight on described pressure relief plate is multiple, and balancing weight quantity can increase and decrease.
Preferred: the outer end of described ftercompction pipeline connects flame trap.
Preferred: gap, higher than the bottom of upper chamber, is left between the bottom of described ftercompction pipeline and the bottom of lower chamber in the top of described passage.
Preferred: the outer wall of described casing to be provided with two the condensed water flow-offs be communicated with respectively bottom upper chamber and bottom lower chambers, described condensed water flow-off configures drain valve.
Preferred: described casing is outside equipped with the leveling instrument vertical with ftercompction plate, described casing outside has mounting bracket.
Aforementioned arbitrary structures can be preferred further: the outer installment of described casing has pressure release indicating device, described pressure release indicating device indicates ball to form by pressure release indicator board and pressure release, described pressure release instruction ball is connected with pressure relief plate by rope yarn, one end of rope yarn and pressure release indicate ball to fix, and the other end is fixed with pressure relief plate through after cabinet exterior in the position higher than pressure relief plate.
Preferred: described rope yarn is Stainless Steel Wire rope yarn.
Aforementioned arbitrary structures can be preferred further: the outer installment of described casing has ftercompction indicating device, described ftercompction indicating device indicates ball to form by ftercompction indicator board and ftercompction, described ftercompction instruction ball is connected with ftercompction plate by rope yarn, one end of rope yarn and ftercompction indicate ball to fix, and the other end is fixed with ftercompction plate after being positioned at the bottom outer wall of casing outside through ftercompction pipeline.
Preferred: described rope yarn is Stainless Steel Wire rope yarn.
The utility model has following beneficial effect: the utility model carries out design research and development for minute-pressure, and its advantage is:
1) anhydrous, can not freeze, be applicable to north of china in winter and use.
2) negative pressure protection start-up point extremely close to 0Pa (namely casing internal pressure is close to ambient pressure), can be accomplished that-10Pa (that is: casing internal pressure is than ambient pressure only low 10Pa) starts, thoroughly stop pipe negative pressure.
3) positive pressure protection start-up point by adjustment balancing weight, can meet the demand of different positive pressure protection, minimumly can accomplish that 300Pa (that is: casing internal pressure is than ambient pressure height 300Pa) starts.
4) duct size and casing can change, and are applicable to the requirement of the flow pressure release (comprising malleation pressure release and negative pressure pressure release) of the overwhelming majority.
5) positive pressure protection structure and the integration of negative pressure operator guards, easy for installation.
6) this protector is pure machinery, does not have powered part, even if having a power failure also do not delay use, namely accomplishes accessible protection.
7) adopt 304 stainless steels to make, antiseptic power is strong.
8) breakdown action and the opening degree of positive pressure protection and negative pressure protection can be seen.
9) detection system can be installed, with interlink electric alarm system.
10) negative pressure protection part installs flame trap, prevents negative pressure tempering phenomenon.
11) structure is simple, not fragile.
12) condensed water possible in casing can be drained.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of positive/negative pressure protector, comprises casing 22, turnover feed channel 19, relief pipeline 20 and ftercompction pipeline 21.Described casing 22 is separated into upper and lower two separate chambers by horizontal baffle 24, i.e. upper chamber and lower chambers.
One end of described turnover feed channel 19 is communicated with lower chambers, the other end of turnover feed channel 19 has flange plate A14, turnover feed channel 19 is connected with biogas main pipeline by flange plate A14, is that the biogas in biogas main pipeline enters bottom chamber by turnover feed channel 19.
One end of described relief pipeline 20 is communicated with upper chamber, the other end has flange plate B16, relief pipeline 20 by flange plate B16 with connect open to atmosphere extraneous pipeline 12 be connected, air is enable to enter upper chamber, and make the biogas that lower chambers releases upper chamber enter in air through relief pipeline 20 and extraneous pipeline 12 successively, the pipeline opening of extraneous pipeline 12 is positioned at the position of more than 2 meters of being above the ground level, with the biogas avoiding Mars to light the release of pipeline opening, and the pipeline opening of extraneous pipeline 12 is bending to be had downwards, flows in upper chamber from pipeline opening to prevent rainwater.
Upper chamber is communicated with by the passage 11 vertically arranged with lower chambers, the pressure relief plate 1 it being formed to sealing is provided with on passage 11 top, the sealing configuration on pressure relief plate 1 and passage 11 top makes pressure relief plate 1 and passage 11 top close contact by the gravity of pressure relief plate 1 self and the pressure of air, and realize the sealing to passage 11 top.In order to ensure the sealing completely on pressure relief plate 1 pair of passage 11 top, can be realized by following several mode: 1. sealing gasket is set in pressure relief plate 1 and corresponding part, passage 11 top, by the self gravitation of pressure relief plate 1 and the pressure compaction sealing gasket of air, realize the sealing to passage 11 top; 2. sealing gasket is set on passage 11 top, by the self gravitation of pressure relief plate 1 and the pressure compaction sealing gasket of air, realizes the sealing to passage 11 top; 3. mutually corresponding sealing gasket is all set on passage 11 top and pressure relief plate 1, by the self gravitation of pressure relief plate 1 and the pressure compaction sealing gasket of air, realizes the sealing to passage 11 top.Those skilled in the art should know, if there is other sealing configuration to be also adapted to the utility model in the prior art, and effect of the present utility model can be reached, can be applied in the technical solution of the utility model, then should be included within scope of the present utility model.
The outer wall of described pressure relief plate 1 side in the horizontal direction and passage 11 is formed hinged by articulated elements 6, and to realize when needs pressure release, the opposite side of pressure relief plate 1 can leaving channel 11 top, realizes the unlatching on passage 11 top, upper chamber is communicated with lower chambers.Articulated elements 6 belongs to existing structure, and its structure can be selected according to actual conditions, as long as can realize articulated elements 6 structure of the opening and closing of pressure relief plate 1, is all applicable to the utility model.
In order to the demand of satisfied different positive pressure protection, pressure relief plate 1 is provided with dismountable balancing weight 2, and balancing weight 2 is configured to multiple, increases and decreases the quantity of the balancing weight 2 on pressure relief plate 1, i.e. the size of the pressure release breakout pressure value of positive pressure adjustable release.In the present embodiment, the Placement of balancing weight 2 is as follows: fix a vertical loop bar at the top of pressure relief plate 1, balancing weight 2 is offered the trepanning with loop bar Spielpassung, balancing weight 2 is set on loop bar by this trepanning, loop bar top arranges threaded end, and be furnished with nut, balancing weight 2 can compress by tightening nut.Even in order to ensure the weight distribution of pressure relief plate 1 and balancing weight 2, loop bar is fixed on the top center of pressure relief plate 1, and trepanning is opened in the central position of balancing weight 2.
In order to clearly learn positive pressure protection state; the scheme that the utility model adopts is that the working state by showing pressure relief plate 1 realizes; its concrete structure is as follows: at the outer installment pressure release indicating device of casing 22; described pressure release indicating device indicates ball 4 to form by pressure release indicator board 5 and pressure release, and described pressure release instruction ball 4 is connected with pressure relief plate 1 by Stainless Steel Wire rope yarn A3.Offer the through hole slided for Stainless Steel Wire rope yarn A3 within it higher than the position of pressure relief plate 1 at casing 22 outer wall, one end of Stainless Steel Wire rope yarn A3 and pressure release indicates ball 4 to fix, and the other end is fixing with pressure relief plate 1 after passing through hole.When pressure relief plate 1 is opened, pressure release instruction ball 4 moves down, and in order to intuitively arrive the displacement distance of pressure release instruction ball 4, pressure release indicator board 5 arranges graduation line.
Described ftercompction pipeline 21 is horizontally disposed with, and its one end is communicated with air, and has flange plate C15 at this end, and ftercompction pipeline 21 connects flame trap 17 by flange plate C15, prevents negative pressure tempering phenomenon.
The other end of described ftercompction pipeline 21 is communicated with lower chambers, ftercompction pipeline 21 and be provided with between lower chambers the ftercompction plate 7 sealed formed to this end of ftercompction pipeline 21, described ftercompction plate 7 is vertically arranged, formed hinged on top and ftercompction pipeline 21 by articulated elements 6, to realize when needs ftercompction, the opposite side of ftercompction plate 7 can leave ftercompction pipeline 21 end, realizes the unlatching of ftercompction pipeline 21, lower chambers is communicated with air.
In order to ensure the sealing completely of ftercompction plate 7 pairs of ftercompction pipeline 21 ends, can be realized by following several mode: 1. sealing gasket is set in pressure relief plate 1 and corresponding part, ftercompction pipeline 21 end, under normal working, the biogas pressure of bottom chamber is greater than external atmospheric pressure, and press seal pad, realize the sealing to ftercompction pipeline 21 end; 2. sealing gasket is set in ftercompction pipeline 21 end, by the biogas pressure press seal pad of bottom chamber, realizes the sealing to ftercompction pipeline 21 end; 3. mutually corresponding sealing gasket is all set in pressure relief plate 1 and ftercompction pipeline 21 end, by the biogas pressure press seal pad of bottom chamber, realizes the sealing to ftercompction pipeline 21 end.Those skilled in the art should know, if there is other sealing configuration to be also adapted to the utility model in the prior art, and effect of the present utility model can be reached, can be applied in the technical solution of the utility model, then should be included within scope of the present utility model.
The outer installment of described casing 22 has ftercompction indicating device, described ftercompction indicating device indicates ball 9 to form by ftercompction indicator board 10 and ftercompction, described ftercompction instruction ball 9 is connected with ftercompction plate 7 by Stainless Steel Wire rope yarn, one end of Stainless Steel Wire rope yarn and ftercompction indicate ball 9 to fix, and the other end is fixed with ftercompction plate 7 after being positioned at the bottom outer wall of casing 22 outside through ftercompction pipeline 21.
In order to clearly learn negative pressure guard mode; the scheme that the utility model adopts is realized by the working state of display ftercompction plate 7; its concrete structure is as follows: at the outer installment ftercompction indicating device of casing 22; described ftercompction indicating device indicates ball 9 to form by ftercompction indicator board 10 and ftercompction, and described ftercompction instruction ball 9 is connected with ftercompction plate 7 by Stainless Steel Wire rope yarn B8.The bottom outer wall being positioned at casing 22 outside at ftercompction pipeline 21 offers the through hole slided for Stainless Steel Wire rope yarn B8 within it, and one end of Stainless Steel Wire rope yarn B8 and ftercompction indicate ball 9 to fix, and the other end is being fixed with the top of ftercompction plate 7 through after through hole.When ftercompction plate 7 is opened, ftercompction instruction ball 9 moves down, and in order to intuitively arrive the displacement distance of ftercompction instruction ball 9, ftercompction indicator board 10 arranges graduation line.In order to ensure that initiation value that negative pressure protects is as best one can close to external atmospheric pressure; the quality settings of ftercompction instruction ball 9 obtains very little; and by the top setting as far as possible of the tie point of Stainless Steel Wire rope yarn B8 and ftercompction plate 7, as long as the little by little mobile just enough of ftercompction instruction ball 9 can be observed.
In order to prevent issuable condensed water, harmful effect is caused to positive/negative-pressure operator guards; the top of described passage 11 is higher than the bottom of upper chamber; the bottom of described ftercompction pipeline 21, higher than the bottom of lower chamber, makes to leave gap between the bottom of ftercompction pipeline 21 and the bottom of lower chamber.The outer wall of described casing 22 is provided with two the condensed water flow-offs be communicated with respectively bottom upper chamber and bottom lower chambers, described condensed water flow-off configures drain valve 13.Drain valve 13 is used at the release upper chamber of certain hour section and the condensed water of lower chambers.
The outside of described casing 22 has mounting bracket 23; for casing 22 is fixed installation; the top of casing 22 is provided with the leveling instrument 18 vertical with ftercompction plate 7; in the process of installing; by adjusting the horizontal position of leveling instrument 18; namely can play the effect of the vertical position of adjustment leveling instrument 18, to guarantee the perpendicularity of ftercompction plate 7, namely guarantee the degree of accuracy of negative pressure protection initiation value.
Generally speaking, the design of this positive/negative pressure protector utilizes the flowing of gas to be the principle of the place movement that ground directional pressure that pressure is large is little forever.Suppose that the highest pressure release value that biogas main pipeline is wished is P1, what biogas main pipeline was wished prevents the ftercompction value of negative pressure from being P2.Biogas main pipeline routine work pressure is P, and external pressure is P0, and so P1 > P > P0 > P2 is only normal working state.In order to ensure the safety of equipment, P2 should be close with P0 as best one can, i.e. P2 ≈ P0.
The working principle of this positive/negative pressure protector: when biogas main pipeline is full of biogas; lower chambers just can be full of biogas; biogas pressure must be P; must be now P > P0; and the gravity of P < P0+ balancing weight 2 and pressure relief plate 1, therefore pressure relief plate 1 is closed.As P > P1, the gravity of P > P0+ balancing weight 2 and pressure relief plate 1, pressure relief plate 1 will be opened, and the gas of biogas pipeline will flow out to upper chamber by lower chambers and arrive ambient air again, thus reaches pressure release effect; As P < P2, ftercompction plate 7 will be opened, and now ambient air enters lower chambers, thus reaches and do not allow P < P0, namely do not allow the pressure of biogas pipeline be less than ambient pressure, play the possibility preventing biogas pipeline from producing negative pressure thus.Only have P when P1 > P > P0, pressure relief plate 1 and ftercompction plate 7 are only closed.It is now normal working state.By observing pressure release instruction ball 4 and the relative position of ftercompction instruction ball 9 respectively on pressure release indicator board 5 and ftercompction indicator board 10, the opening degree of pressure relief plate 1 and ftercompction plate 7 just can be known.
Because pressure release instruction ball 4 and ftercompction instruction ball 9 mainly play indicative function, the weight of the two designs lighter as far as possible, particularly the weight of ftercompction instruction ball 9 can play some impacts to the unlatching of ftercompction plate 7, therefore by the tie point of Stainless Steel Wire rope yarn B8 and ftercompction plate 7 also top setting as far as possible, choose one can play and allow ftercompction indicate ball 9 to move, the position that the resistance produced the unlatching of ftercompction plate 7 is again minimum.If according to demand, the ftercompction initiation value that negative pressure be made to protect reduces, and also can be adjusted by the weight increasing ftercompction instruction ball 9.In addition, ftercompction indicating device is removed, although lose the effect of ftercompction instruction, now can reach ftercompction value P2=P0, just open as long as the biogas pressure P namely in biogas main pipeline is less than ambient pressure P0 ftercompction plate 7 at once, stop biogas main pipeline up hill and dale and be in negative pressure state.
Claims (10)
1. a positive/negative pressure protector, it is characterized in that: comprise the casing with upper and lower two chambers, the upper chamber of described casing and lower chambers are by the channel connection vertically arranged, and be provided with the pressure relief plate it being formed to sealing on the top of passage, pressure relief plate is formed hinged in side and passage;
Described casing is provided with for connecting open to atmosphere relief pipeline, described relief pipeline is communicated with the upper chamber of casing;
Described casing is provided with the turnover feed channel for being communicated with biogas main pipeline, described turnover feed channel is communicated with the lower chambers of casing;
The open to atmosphere ftercompction pipeline of the company of being provided with on described casing, the lower chambers of described ftercompction pipeline communication casing, described ftercompction pipeline and be provided with between lower chambers the ftercompction plate sealed formed to ftercompction pipeline, described ftercompction plate is vertically arranged, and is formed hinged on top and ftercompction pipeline.
2. positive/negative pressure protector according to claim 1, is characterized in that: described pressure relief plate is provided with dismountable balancing weight, and the balancing weight on described pressure relief plate is multiple, and balancing weight quantity can increase and decrease.
3. positive/negative pressure protector according to claim 1, is characterized in that: the outer end of described ftercompction pipeline connects flame trap.
4. positive/negative pressure protector according to claim 1, is characterized in that: gap, higher than the bottom of upper chamber, is left between the bottom of described ftercompction pipeline and the bottom of lower chamber in the top of described passage.
5. positive/negative pressure protector according to claim 4, is characterized in that: the outer wall of described casing is provided with two the condensed water flow-offs be communicated with respectively bottom upper chamber and bottom lower chambers, described condensed water flow-off configures drain valve.
6. positive/negative pressure protector according to claim 1, is characterized in that: described casing is outside equipped with the leveling instrument vertical with ftercompction plate, and described casing outside has mounting bracket.
7. according to the positive/negative pressure protector in claim 1 to 6 described in any one; it is characterized in that: the outer installment of described casing has pressure release indicating device; described pressure release indicating device indicates ball to form by pressure release indicator board and pressure release; described pressure release instruction ball is connected with pressure relief plate by rope yarn; one end of rope yarn and pressure release indicate ball to fix, and the other end is fixed with pressure relief plate through after cabinet exterior in the position higher than pressure relief plate.
8. positive/negative pressure protector according to claim 7, is characterized in that: described rope yarn is Stainless Steel Wire rope yarn.
9. according to the positive/negative pressure protector in claim 1 to 6 described in any one; it is characterized in that: the outer installment of described casing has ftercompction indicating device; described ftercompction indicating device indicates ball to form by ftercompction indicator board and ftercompction; described ftercompction instruction ball is connected with ftercompction plate by rope yarn; one end of rope yarn and ftercompction indicate ball to fix, and the other end is fixed with ftercompction plate after being positioned at the bottom outer wall of casing outside through ftercompction pipeline.
10. positive/negative pressure protector according to claim 9, is characterized in that: described rope yarn is Stainless Steel Wire rope yarn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420550615.7U CN204099912U (en) | 2014-09-23 | 2014-09-23 | Positive/negative pressure protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420550615.7U CN204099912U (en) | 2014-09-23 | 2014-09-23 | Positive/negative pressure protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204099912U true CN204099912U (en) | 2015-01-14 |
Family
ID=52268341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420550615.7U Expired - Lifetime CN204099912U (en) | 2014-09-23 | 2014-09-23 | Positive/negative pressure protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204099912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235616A (en) * | 2014-09-23 | 2014-12-24 | 成都安美固丹田新能源科技有限公司 | Positive-negative pressure protector |
-
2014
- 2014-09-23 CN CN201420550615.7U patent/CN204099912U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235616A (en) * | 2014-09-23 | 2014-12-24 | 成都安美固丹田新能源科技有限公司 | Positive-negative pressure protector |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |