CN109237057A - Hydrostatic pressure overpressure protection method and apparatus - Google Patents
Hydrostatic pressure overpressure protection method and apparatus Download PDFInfo
- Publication number
- CN109237057A CN109237057A CN201811183605.3A CN201811183605A CN109237057A CN 109237057 A CN109237057 A CN 109237057A CN 201811183605 A CN201811183605 A CN 201811183605A CN 109237057 A CN109237057 A CN 109237057A
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- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 230000003068 static effect Effects 0.000 claims abstract description 45
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 23
- 230000009471 action Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 description 14
- 238000003325 tomography Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
本发明属于管道输水技术领域。一种静水压力超压保护方法，所述静水压力超压保护方法为：在地面高差方位上，根据水的可压缩特性和管道的尺寸参数，通过在所述管道中布设闸阀，对所述管道进行区段划分，在所述管道的各区段布设静压保护阀，并设定相应区段的所述静压保护阀的泄压阈值；在所述管道充水情况下，对所述管道各区段的闸阀关闭止水；根据各区段所述静压保护阀的泄压阈值，通过所述静压保护阀的泄水，使得该区段与上游区段之间形成空管段，实现水体断层，进一步实现高差方位上的静水压断层。一种静水压力超压保护装置，包括：管道、闸阀和静压保护阀。本申请能够针对静水压进行有效分段泄压，从而实现水体的分段不连续，避免了静水压的叠加。
The invention belongs to the technical field of pipeline water delivery. A hydrostatic pressure overpressure protection method, the hydrostatic pressure overpressure protection method is: in the ground height difference direction, according to the compressible characteristics of water and the size parameters of the pipeline, by arranging a gate valve in the pipeline, to the said pipeline. The pipeline is divided into sections, a static pressure protection valve is arranged in each section of the pipeline, and the pressure relief threshold of the static pressure protection valve of the corresponding section is set; when the pipeline is filled with water, the pipeline is The gate valve of each section is closed to stop the water; according to the pressure relief threshold of the static pressure protection valve in each section, the water discharge of the static pressure protection valve makes an empty pipe section between the section and the upstream section to realize the water body To further realize the hydrostatic pressure fault in the azimuth of elevation difference. A hydrostatic pressure overpressure protection device comprises: a pipeline, a gate valve and a static pressure protection valve. The present application can effectively release pressure in sections for the hydrostatic pressure, thereby realizing the discontinuous section of the water body and avoiding the superposition of the hydrostatic pressure.
Description
Technical field
The invention belongs to pipeline water delivery technical fields, and in particular to a kind of hydrostatic pressure overpressure protection method and apparatus.
Background technique
Pipeline water delivery is that water is directly sent to destination (such as field irrigation) using pipeline, reduces water and conveyed in open channel
Leakage and evaporation loss in journey.Pipeline water delivery compared with open channel water delivery, have many advantages, such as water delivery it is rapid, it is water-saving, save ground, water
Usage factor can be improved to 0.95；Economize on electricity 20%~30%；Save ground 2%~3%；Amount of increase in production 10%.The irrigation of developed country
Water delivery largely uses pipeline.
Guarantee that conduit running and safe operation are necessary, while uniform, pressure equilibrium etc. of supplying water is pipe-line system performance
Main indicator, for reach pipe network supply water uniformly, pressure is balanced, system is safe the purpose of, currently used major measure is main
It include: pressure (flow) adjuster, air inlet and exhaust valve and safety valve etc..
Existing pressure (flow) adjuster be mostly using its import pressure, by reduce discharge section area etc. into
Row energy dissipating is the part generated in flow process using water flow and along journey at all to play reduction water pressure downstream
Head loss, however be that water does not flow and is, due to the hydrostatic pressure that ground height etc. is formed in the duct be impossible be by upper
It states decompressor and cuts down extra water pressure, this is also one of the main reason for urban pipe network explosion concentrates on night.
Safety valve is to guarantee pipeline when operating pressure exception is with there is accident, to one kind of pipeline and equipment active defense
Main method, boiler, etc. high-voltage operations pipe network system it is commonplace.The opening and closing element of safety valve is generally in normally off,
When the pressure medium in equipment or pipeline, which increases, is more than specified value, discharge medium prevents from being situated between in pipeline or equipment to outside system
Matter pressure is more than the Special valve of specified value.Safety valve belongs to automatic valve class, is mainly used for boiler, pressure vessels and pipes
On, control pressure is no more than specified value, and safety and system to pipeline have run important protective effect.But in-line relief valve is once
Work (sluicing) is usually destructive, cannot keep the service pressure of pipeline.
Therefore, the pressure control of pipeline water delivery is had the following problems at this stage: first is that pressure (flow) adjuster is only
It works when can be water flow movement, can not work when water flow is static；Second is that safety valve once works, (sluicing) is usually destructiveness
, it cannot keep the service pressure of pipeline.Therefore in some application fields in, cannot achieve the adjusting of the pressure of pipeline, deposit
In biggish risk and hidden danger.
Summary of the invention
The purpose of the present invention is in view of the above problems and insufficient, provide a kind of hydrostatic pressure overpressure protection method with
Device can carry out effective sectional pressure relief for hydrostatic pressing and avoid hydrostatic pressing to realize that the segmentation of water body is discontinuous
Superposition.
In order to achieve the above objectives, it is adopted the technical scheme that:
A kind of hydrostatic pressure overpressure protection method, the hydrostatic pressure overpressure protection method are as follows:
In ground height orientation, according to the dimensional parameters of the compressive characteristics of water and pipeline, by the pipeline
Gate valve is laid, section partition is carried out to the pipeline, static pressure is laid in each section of the pipeline and protects valve, and set respective area
The pressure release threshold value of the static pressure protection valve of section；
In the pipeline water-filling, sealing is closed to the gate valve of each section of the pipeline；
The pressure release threshold value that valve is protected according to static pressure described in each section protects the sluicing of valve by the static pressure, so that the area
Blank pipe section is formed between section and upstream zone, is realized water body tomography, is further realized the hydrostatic pressing tomography in height difference orientation.
Hydrostatic pressure overpressure protection method according to the present invention, it is preferable that further include alarm module, protected with each static pressure
Valve is protected to be electrically connected.
Hydrostatic pressure overpressure protection method according to the present invention, it is preferable that upstream zone water leakage, so that upstream zone is under
When swimming the water body formation non-individual body of section, when hydrostatic pressing reaches the pressure release threshold value of static pressure protection valve of downstream section, then accordingly
Static pressure protection valve drain pressure release, make water body tomography again, and the gate valve of alarm module prompt maintenance upstream zone.
A kind of hydrostatic pressure overpressure protection apparatus, comprising: pipeline；Gate valve, multiple gate valves are laid in along ground height
In the pipeline, and pipeline is made to form section partition；Valve is protected with static pressure, is correspondingly arranged on the pipeline of each section；When
In the case of pipeline water-filling, the gate valve is closed, and the static pressure protection valve realizes ground by sluicing according to setting pressure release threshold value
In height difference orientation in the pipeline hydrostatic pressing tomography.
Hydrostatic pressure overpressure protection apparatus according to the present invention, it is preferable that the static pressure protection valve includes: shell, connection
It is arranged on the pipeline of respective section；Seal receptacle is arranged in the shell；And seal, it is corresponding with the seal receptacle
Setting, and it is provided with reset assembly between the seal and shell, when hydraulic pressure is more than or equal to pressure release threshold value, the sealing
Body is separated with seal receptacle, realizes that pressure release discharges water；When hydraulic pressure is less than pressure release threshold value, seal rain under the action of reset assembly is close
Seal seat gluing, sealing.
Hydrostatic pressure overpressure protection apparatus according to the present invention, it is preferable that be hollow conical cavity, institute in the middle part of the seal receptacle
It states seal and is located at conical cavity matching sealed taper；The reset assembly includes: the guide rod that the seal rear portion is arranged in；Setting
In the rear end cap of the shell end, and the matching guide bars are slidably arranged on the rear end cap；And reset spring, it is described multiple
Position spring matching is arranged on the guide rod between the seal and the rear end cap.
Hydrostatic pressure overpressure protection apparatus according to the present invention, it is preferable that the rear end cap or with the sealing base rear end pair
Drain hole is provided on the shell answered.
Hydrostatic pressure overpressure protection apparatus according to the present invention, it is preferable that adjusting bushing is provided on the rear end cap, it is described
Guide rod is slidably arranged in the adjusting bushing, and the reset spring is arranged between adjusting bushing and the seal.
Hydrostatic pressure overpressure protection apparatus according to the present invention, it is preferable that the adjusting bushing and the rear end cap screw thread connect
It connects；Or the adjusting bushing matching is slidably arranged on the rear end cap, and is arranged between bushing and the rear end cap adjusting
There is clamping screw.
Hydrostatic pressure overpressure protection apparatus according to the present invention, it is preferable that further include control system, the control system includes
Alarm module passes through the movement of the control system control gate valve and the warning of alarm module.
By adopting the above technical scheme, acquired beneficial effect is:
Structure of the invention design rationally, using setting static pressure protects valve, while being sluiced by lower end, the side of import sealing
Formula so that continuous water body realizes segmentation, and then avoids the superposition of the hydrostatic pressing of water body, and it is difficult to realize hydrostatic pressure abatement
Topic, is furthermore possible to be improved the service life of pipeline, pipeline burst is avoided to rupture.
For the application problem to be solved, by protecting the structure of valve to design to static pressure, can be realized it is multi-functional,
The purpose of repetitive operation, structure is simple, easy to process, reduces manufacturing cost；And the performance with convenient maintenance, cost
It is low.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, hereinafter by the attached drawing to the embodiment of the present invention into
Row is simple to be introduced.Wherein, attached drawing is used only for showing some embodiments of the present invention, rather than whole embodiments of the invention are limited
It is formed on this.
Fig. 1 is one of the structural schematic diagram according to the hydrostatic pressure overpressure protection apparatus of the embodiment of the present invention, it illustrates
The positional relationship of pipeline, gate valve and relief valve.
Fig. 2 is one of the structural schematic diagram of relief valve according to the embodiment of the present invention, and it illustrates a kind of tools of relief valve
Body structure.
Fig. 3 is according to the second structural representation of the relief valve of the embodiment of the present invention, and it illustrates a kind of tools of relief valve
Body structure.
Fig. 4 is the superposition schematic diagram of hydrostatic pressing in pipeline in the prior art.
Fig. 5 is the hydrostatic pressing distributed architecture schematic diagram according to the hydrostatic pressure overpressure protection apparatus of the embodiment of the present invention.
Fig. 6 is the second structural representation according to the hydrostatic pressure overpressure protection apparatus of the embodiment of the present invention, it illustrates
The integral structure of gate valve and static pressure protection valve.
Serial number in figure:
100 be pipeline；
200 be gate valve；
300 be static pressure protection valve, 301 be shell, 302 be seal receptacle, 303 be seal, 304 be guide rod, 305 be after
End cap, 307 be reset spring, 308 be drain hole, 309 be adjust bushing.
H is ground height；
P is the hydrostatic pressing size of corresponding position.
Specific embodiment
In order to enable the purpose of technical solution of the present invention, technical characteristic and technical effect are clearer, it hereinafter will knot
The attached drawing for closing the specific embodiment of the invention, is clearly and completely described the exemplary scenario of the embodiment of the present invention.Obviously, institute
The embodiment of description is a part of the embodiments of the present invention, instead of all the embodiments.Based on described reality of the invention
Example is applied, those of ordinary skill in the art's every other embodiment obtained under the premise of being not necessarily to creative work belongs to
The scope of protection of the invention.
Referring to Fig. 1-Fig. 6, this application discloses a kind of hydrostatic pressure overpressure protection method, specifically:
In ground height orientation, according to the dimensional parameters of the compressive characteristics of water and pipeline, by laying in the duct
Gate valve carries out section partition to pipeline, lays static pressure in each section of pipeline and protects valve, and sets the static pressure protection of respective section
The pressure release threshold value of valve；
In pipeline water-filling, sealing is closed to the gate valve of each section of pipeline；
The pressure release threshold value that valve is protected according to each section static pressure protects the sluicing of valve by static pressure, so that the section and upstream
Blank pipe section is formed between section, is realized water body tomography, is further realized the hydrostatic pressing tomography in height difference orientation.
Wherein, the basic principle of the compressive characteristics based on water is:
Coefficient of bulk compressibility is 4.76 × 10 to water at normal temperature-10m2/ N, the compressed coefficient obtain volume multiplied by pressure change
Opposite variation.Pressure rises to 1.9MPa, the opposite variation about -0.0905% of water volume from 0MPa.
For 1 cubic metre 20 DEG C of water under 30MPa pressure, volume is reduced by about 1.346%.
The volume of liquid may be expressed as: with the rule of pressure change
V-VO=β (p-p0)
In formula: p0For standard atmospheric pressure, VOFor pressure p0When liquid volume, β be liquid the compressed coefficient, V is pressure
Liquid volume when for p.
At 20 DEG C, the compressed coefficient β of waterw=4.5 × 10-100/ Pa=4.5 × 10-4/ MPa, when pressure is in 30MPa,
Have:
△ V=β w (p-p0)=4.5 × 10-4/ MPa × (30-0.1) MPa ≈ 0.01346=1.346%.
1m3Water under 30MPa pressure, i.e., volume reduces 0.01346 cubic metre.
It is 1.0km with length, for the pipeline of diameter 300mm, corresponding water volume are as follows:
1000*3.14*0.3*0.3/4=1000*0.070=70.65 cubic meter.
Water is under 30MPa pressure, i.e., volume reduces 0.95 cubic metre.It that is to say and say length 1.0km, diameter 300mm's
Pipeline sluicing 1.0m3Afterwards, the pipe head of the pipeline section will there are 0.05 cubic metre of space, i.e., the blank pipes of close 0.71m with its Upstream section
Section will not form non-individual body with the pipeline section, it is cumulative in turn result in hydrostatic pressure even if the pipeline section upstream gate valve leak in this way.
Using the compressibility of above-mentioned water, the method using " lower end sluicing, import sealing " prevents continuous duct segments
It is cumulative to have stopped hydrostatic pressing segmentation, has achieved the purpose that reduce the pipeline section hydrostatic pressure.
Each static pressure protection valve is electrically connected with alarm module, and receives signal by control system, when generation upstream zone lock
Valve leakage, when so that the water body of upstream zone and downstream section forming non-individual body, hydrostatic pressing is superimposed at this time, and hydrostatic pressing reaches
The pressure release threshold value of the static pressure protection valve of downstream section, then corresponding static pressure protection valve drains pressure release, makes water body tomography again, and
The gate valve of alarm module prompt maintenance upstream zone, if the leak of upstream zone gate valve cannot stop, the static pressure of respective section is protected
Valve repeats to sluice.
The application is directed to above-mentioned sectional pressure relief mode, provides a kind of hydrostatic pressure overpressure protection apparatus comprising pipeline
100, gate valve 200 and static pressure protect valve 300, and multiple gate valves 200 are laid in pipeline 100 along ground height, and make 100 shape of pipeline
At section partition；Static pressure protection valve is correspondingly arranged on the pipeline of each section；In the case of pipeline water-filling, gate valve 200 is closed, quiet
Pressure protection valve realizes the tomography of hydrostatic pressing in pipeline in ground height orientation by sluicing according to setting pressure release threshold value.
The present embodiment specifically provides a kind of structure of static pressure protection valve, specifically includes shell 301, seal receptacle 302
With seal 303, the connection of shell 301 is arranged on the pipeline of respective section, and seal receptacle 302 is arranged in shell 301, seal
303 are correspondingly arranged with seal receptacle 302, and are provided with reset assembly between seal 303 and shell 301, when hydraulic pressure be greater than etc.
When pressure release threshold value, seal is separated with seal receptacle, realizes that pressure release discharges water；When hydraulic pressure is less than pressure release threshold value, seal is multiple
Rain seal receptacle gluing, sealing under the action of hyte part.
It is hollow conical cavity in the middle part of seal receptacle, seal is located at conical cavity matching sealed taper；Reset assembly includes setting
Seal rear portion guide rod 304, the rear end cap 305 and reset spring 307 of shell end, matching guide bars sliding setting are set
On rear end cap 305；Reset spring matching is arranged on the guide rod 304 between seal and rear end cap, rear end cap 305 or with
Drain hole 308 is provided on the corresponding shell in 302 rear end of seal receptacle.
In order to further play adjustment effect, it is provided on rear end cap and adjusts bushing 309, guide rod sliding setting
It is adjusting in bushing, and the setting of reset spring 307 is being adjusted between bushing 309 and seal 303, adjusts bushing 309 and rear end
Lid 305 is threadedly coupled；Or it adjusts bushing matching and is slidably arranged on rear end cap, and be provided between bushing and rear end cap adjusting
Clamping screw, to further control the decrement of reset spring, adjusts pressure release threshold by adjusting the position of bushing
Value.
As shown in fig. 6, being convenient for installing to further improve the integrated performance of whole equipment, static pressure is protected
Shield valve is arranged on the valve body of gate valve, and static pressure protection valve is located at the tract of gate valve, to realize static pressure protection valve and gate valve
Linkage control, when gate valve leak, static pressure protection valve can be realized sluicings, and control the closing of corresponding gate valve.
In order to realize the controllability of whole system, it is additionally provided with control system, gate valve is sequencing valve, passes through control system
It realizes its closing motion, includes alarm module in control system, be specifically alarm, connect with control system, alarm
Module is used to detect the action situation of static pressure protection valve, and feeds back detection model, in entire overpressure protection system, is by control
The movement for control gate valve of uniting, and then the warning of the auto-action and alarm module by static pressure protection valve, realize whole system
Controllability.
Unless otherwise defined, the technical term or scientific term used herein should be in fields of the present invention and has
The ordinary meaning that the personage of general technical ability is understood." packet used in present patent application specification and claims
Include " or the similar word such as the "comprising" element or object that mean to occur before the word cover and appear in the word presented hereinafter
Element perhaps object and its equivalent and be not excluded for other elements or object." connection " or " connected " etc. are not similar to word
It now due to physics or mechanical connection, but may include electrical connection, it is either direct or indirect.
"upper", "lower", "left", "right" etc. are only used for indicating relative positional relationship, after the absolute position for being described object changes, then should
Relative positional relationship may also correspondingly change.
It is described in detail exemplary embodiment of the invention above in reference to preferred embodiment, however art technology
Personnel it will be appreciated that under the premise of without departing substantially from theory of the present invention, above-mentioned specific embodiment can be made a variety of modifications and
Remodeling, and multiple combinations can be carried out to each technical characteristic proposed by the present invention, structure, and without departing from protection model of the invention
It encloses, protection scope of the present invention is determined by the attached claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811183605.3A CN109237057B (en) | 2018-10-11 | 2018-10-11 | Hydrostatic pressure overpressure protection method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811183605.3A CN109237057B (en) | 2018-10-11 | 2018-10-11 | Hydrostatic pressure overpressure protection method and apparatus |
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| Publication Number | Publication Date |
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| CN109237057A true CN109237057A (en) | 2019-01-18 |
| CN109237057B CN109237057B (en) | 2019-09-27 |
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ID=65052656
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811183605.3A Active CN109237057B (en) | 2018-10-11 | 2018-10-11 | Hydrostatic pressure overpressure protection method and apparatus |
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| Country | Link |
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| CN (1) | CN109237057B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118391597A (en) * | 2024-05-28 | 2024-07-26 | 山东泰展机电科技股份有限公司 | Filtering component suitable for distributing valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5404905A (en) * | 1994-04-25 | 1995-04-11 | Lauria; Thomas J. | Backflow preventer with failure indicator |
| JP2004360375A (en) * | 2003-06-06 | 2004-12-24 | Sekisui Chem Co Ltd | Water supply piping system and valve body used for this system |
| CN204187201U (en) * | 2014-10-23 | 2015-03-04 | 张兴贵 | Safety anti-explosive pipeline |
| CN207484568U (en) * | 2017-11-17 | 2018-06-12 | 深圳市博山水泵设备技术开发有限公司 | A kind of water supply overpressure protection system |
-
2018
- 2018-10-11 CN CN201811183605.3A patent/CN109237057B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5404905A (en) * | 1994-04-25 | 1995-04-11 | Lauria; Thomas J. | Backflow preventer with failure indicator |
| JP2004360375A (en) * | 2003-06-06 | 2004-12-24 | Sekisui Chem Co Ltd | Water supply piping system and valve body used for this system |
| CN204187201U (en) * | 2014-10-23 | 2015-03-04 | 张兴贵 | Safety anti-explosive pipeline |
| CN207484568U (en) * | 2017-11-17 | 2018-06-12 | 深圳市博山水泵设备技术开发有限公司 | A kind of water supply overpressure protection system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118391597A (en) * | 2024-05-28 | 2024-07-26 | 山东泰展机电科技股份有限公司 | Filtering component suitable for distributing valve |
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| Publication number | Publication date |
|---|---|
| CN109237057B (en) | 2019-09-27 |
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