CN109404544B - Copper-plastic composite double check valve - Google Patents
Copper-plastic composite double check valve Download PDFInfo
- Publication number
- CN109404544B CN109404544B CN201811271548.4A CN201811271548A CN109404544B CN 109404544 B CN109404544 B CN 109404544B CN 201811271548 A CN201811271548 A CN 201811271548A CN 109404544 B CN109404544 B CN 109404544B
- Authority
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- China
- Prior art keywords
- check valve
- valve disc
- copper
- spring
- plastic composite
- 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.)
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- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 239000004033 plastic Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/52—Means for additional adjustment of the rate of flow
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a copper-plastic composite double check valve, which comprises a check valve main body, an outer check valve disc and an inner check valve disc, wherein the top end of the check valve main body is fixedly covered with a top cover through a fixing bolt, a water inlet, a connecting port, a check cavity and a water outlet are sequentially formed in the check valve main body, and the water inlet, the connecting port, the check cavity and the water outlet are communicated.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a copper-plastic composite double check valve.
Background
Along with the continuous development of economy in China, the industrial development speed is faster and faster, the centralization of industry is gradually presented, the valve is an important part in life and production manufacturing processes, the check valve is an important part in the valve, and the check valve is a valve with a circular valve clack as an opening and closing part and can stop medium backflow by means of self weight and medium pressure generating action, but the existing check valve has some defects in the use process.
The existing check valve is single in use mode, can only be opened and closed singly, and when the flowing pressure of liquid passing through the check valve is increased, the impact force received in the check valve is large, so that the check valve is easy to damage, the use of the check valve is shortened, and the use requirement cannot be met.
Disclosure of Invention
The invention aims to provide a copper-plastic composite double check valve so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a compound double check valve is moulded to copper, includes check valve main part, outer check valve disc and interior check valve disc, the top of check valve main part has the top cap through fixing bolt fixed cover, and the inside of check valve main part has seted up water inlet, connector, check chamber and delivery port in proper order, water inlet, connector, check chamber and delivery port communicate with each other, the last fixed surface of connector has inlayed waterproof sealing rubber cover, the upper surface of waterproof sealing rubber cover is pressed there is outer check valve disc, there is the guide post above the outer check valve disc through synchronizing bar sliding connection, the guide post welds the lower surface at the top cap, and the outer guide chamber has been seted up to the outer wall fretwork of guide post, the inside slip cap in outer guide chamber has the spacing ring, the outer wall welding of spacing ring has four the synchronizing bar, and the upper surface welding of spacing ring has the outer spring, the inner guide chamber has been seted up at the inner middle part in the guide post, the inside in guide chamber has the connecting rod through inner spring coupling, the bottom welding of connecting rod has an interior check valve disc, the rubber pad of the outer check valve disc of the junction.
The electromagnetic chuck comprises a control module and an external power supply, wherein the control module is electrically coupled with the external power supply, and the control module is electrically coupled with the electromagnetic chuck;
the electromagnetic chuck is sealed to be embedded in the waterproof sealing rubber sleeve, an iron block is pressed above the electromagnetic chuck through magnetic force absorption, and the iron block is fixed in the outer check valve disc bottom.
The alarm module comprises an alarm lamp, the alarm module is electrically coupled with the control module, the alarm lamp comprises a red lamp and a green lamp, the alarm lamp is electrically coupled with the control module, the electromagnetic chuck is electrically coupled with the external power supply, the red lamp is on, the electromagnetic chuck is not electrically coupled with the external power supply, the green lamp is on, and the alarm lamp is fixed above the top cover through threads.
The inner guide cavity is welded with an anti-tilting column at the inner top wall, the anti-tilting column is sleeved in the inner part of the inner spring, the anti-tilting column is matched with and inserted in the slot, the slot is formed in the upper surface of the inner connecting rod, and the depth dimension of the slot is larger than the height dimension of the anti-tilting column.
The inner springs and the outer springs are compression springs, and the elastic coefficient of the inner springs is larger than that of the outer springs.
One end of the inner spring is welded on the top wall inside the inner guide cavity, and the other end of the inner spring is welded on the top end of the connecting rod.
The bottom surfaces of the inner check valve disc and the outer check valve disc are positioned on the same horizontal line, and the inner check valve disc and the outer check valve disc cover right above the connecting port.
Wherein, the synchronizing rod is L type shape, and the synchronizing rod welds between spacing ring and outer check valve disc.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the outer check valve disc and the inner check valve disc which are mutually matched and sleeved can be automatically and flexibly adjusted according to the flowing pressure of the liquid, when the flowing pressure of the liquid of the check valve main body is smaller, the liquid can push the inner check valve disc upwards, so that the liquid with small flow flows, when the flowing pressure of the liquid of the check valve main body is larger, the liquid can push the outer check valve disc upwards, and the liquid flows through the whole connecting port.
2. According to the invention, through the magnetic attraction between the electromagnetic chuck and the iron block, the control of the movement of the external check valve disc is realized, the use stability of the external check valve disc is enhanced, and the flow caliber of liquid can be changed according to the use requirement when the liquid flow pressure is high, so that the use flexibility of the check valve main body is increased.
Drawings
FIG. 1 is a schematic cross-sectional view of a first embodiment of the overall structure of the present invention;
FIG. 2 is an enlarged view of the structure of FIG. 1A in accordance with the present invention;
FIG. 3 is an enlarged view of the structure of FIG. 1B in accordance with the present invention;
FIG. 4 is a side view of the inner check valve disc construction of the present invention;
FIG. 5 is a cross-sectional view of a mounting bracket of the present invention;
fig. 6 is a schematic diagram of a hardware connection structure of the present invention.
In fig. 1-6: 1-a check valve body; 10-top cover; 101-fixing bolts; 102-warning lamp; 11-a non-return chamber; 12-connecting ports; 13- -a water inlet; 14-a guide post; 141-an outer guide lumen; 142-anti-diagonal columns; 143-an inner guide lumen; 144-limiting rings; 15-a water outlet; 16-a waterproof sealing rubber sleeve; 17-an electromagnetic chuck; 171-a control module; 172-an external power source; 2-an outer check valve disc; 21-an inner check valve disc; 211-connecting rods; 212-slots; 213-rubber pad; 22-synchronizing bar; 23-iron blocks; 3-an inner spring; 4-outer spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First embodiment
Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a compound double check valve is moulded to copper, includes check valve main part 1, outer check valve disc 2 and interior check valve disc 21, the top of check valve main part 1 is through the fixed lid of fixing bolt 101 has top cap 10, and the inside of check valve main part 1 has seted up water inlet 13, connector 12, check chamber 11 and delivery port 15 in proper order, water inlet 13, connector 12, check chamber 11 and delivery port 15 communicate with each other, the liquid that gets into in the check valve main part 1 passes water inlet 13, connector 12, check chamber 11 and delivery port 15 in proper order, the fixed waterproof rubber cover 16 that inlays of upper surface of connector 12, the upper surface of waterproof rubber cover 16 is pressed outer check valve disc 2, wherein waterproof rubber cover 16 can increase the leakproofness between connector 12 upper surface and the outer check valve disc 2, avoids the liquid to take place the backward flow phenomenon, the top of outer check valve disc 2 has guide post 14 through synchronizing bar 22 sliding connection, the synchronizing rod 22 is L-shaped, the synchronizing rod 22 is welded between the limiting ring 144 and the outer check valve disc 2, the guide post 14 is welded on the lower surface of the top cover 10, the outer guide cavity 141 is hollowed out on the outer surface wall of the guide post 14, the limiting ring 144 is sleeved in the outer guide cavity 141 in a sliding manner, the four synchronizing rods 22 are welded on the outer wall of the limiting ring 144, when the outer check valve disc 2 moves upwards, under the action of the synchronizing rod 22, the limiting ring 144 moves upwards along the outer guide cavity 141, the limiting ring 144 mainly plays a role of limiting the outer check valve disc 2 to deviate when moving upwards, the moving stability of the outer check valve disc 2 is improved, the outer spring 4 is welded on the upper surface of the limiting ring 144, the outer spring 4 is movably sleeved in the outer guide cavity 141, the inner guide cavity 143 is formed in the middle of the guide post 14, the inside of interior direction chamber 143 is connected with connecting rod 211 through interior spring 3, the bottom welding of connecting rod 211 has interior check valve disc 21, interior check valve disc 21 cooperation is passed through and is penetrated at the middle part of outer check valve disc 2, and the fixed cover of outward appearance wall of interior check valve disc 21 and outer check valve disc 2 junction has one deck rubber pad 213, interior spring 3 and outer spring 4 are the compression spring, and the elastic coefficient of interior spring 3 is greater than the elastic coefficient of outer spring 4, the inside roof of direction chamber 143 is welded to one end of interior spring 3, and the other end welding of interior spring 3 is on the top of connecting rod 211, and wherein interior spring 3 mainly plays the effect that interior check valve disc 21 reset, and outer spring 4 mainly plays the effect that outer check valve disc 2 reset to realize the effect of non return.
A control module 171 and an external power source 172, the control module 171 being electrically coupled to the electromagnetic chuck 17; the electromagnetic chuck 17 is sealed and embedded in the waterproof sealing rubber sleeve 16, an iron block 23 is pressed above the electromagnetic chuck 17 through magnetic force, and the iron block 23 is fixed in the bottom end of the outer check valve disc 2, wherein the control module 171 can be a circuit comprising at least one processor, a circuit comprising at least one single chip microcomputer, or a combination of various circuits or chips, so long as corresponding functions can be realized. It will be appreciated that, for those skilled in the art, the control module may also implement the corresponding function in a pure hardware manner for a common circuit combined by an amplifier, a comparator, a triode, a MOS tube, etc., and when in use, the control module 171 controls the electrical coupling and decoupling of the electromagnetic chuck 17 and the external power supply 172, so that the stability of the outer check valve disc 2 can be enhanced by utilizing the magnetic connection between the electromagnetic chuck 17 and the iron block 23 according to actual use requirements, and the flow caliber of the liquid can be changed according to use requirements when the flow pressure of the liquid is high, thereby increasing the use flexibility of the check valve body 1.
The alarm module comprises an alarm lamp 102, the alarm module is electrically coupled with the control module 171, wherein the alarm lamp 102 comprises a red lamp and a green lamp, the alarm lamp 102 is electrically coupled with the control module 171, the red lamp is on when the electromagnetic chuck 17 is electrically coupled with the external power supply 172, the green lamp is on when the electromagnetic chuck 17 is not electrically coupled with the external power supply 172, the alarm lamp 102 is fixed above the top cover 10 in a threaded manner, and the red lamp and the green lamp mainly serve as on-off conditions of the electromagnetic chuck 17 and the external power supply 172 for reminding workers, so that convenience is provided for actual operation of the check valve main body 1.
The inside roof welding of interior direction chamber 143 has prevents the sloping post 142, prevent the inside of spring 3 including the sloping post 142 cover, and prevent that the sloping post 142 cooperation is inserted in the inside of slot 212, the upper surface of connecting rod 211 is seted up to the slot 212, and the degree of depth size of slot 212 is greater than the high size of sloping post 142, when the pressure of the interior liquid flow of this check valve main part 1 is less, the liquid is under the effect of pressure, the interior check valve disc 21 of jack-up, the liquid flows, interior check valve disc 21 rises at this moment, in-process that rises, prevent that the sloping post 142 cooperation from inserting in the slot 212, prevent the perpendicularity that interior check valve disc 21 risees, avoid taking place the slope to influence the performance of whole check valve main part 1, play the effect of protection check valve main part 1.
The bottom surfaces of the inner check valve disc 21 and the outer check valve disc 2 are positioned on the same horizontal line, the inner check valve disc 21 and the outer check valve disc 2 are covered right above the connecting port 12, the outer check valve disc 2 and the inner check valve disc 21 which are sleeved with each other in a matched mode can be automatically and flexibly adjusted according to the flowing pressure of liquid, a composite double check valve mode is utilized, damage caused by the use of the check valve when fluid flows with different pressures can be avoided, a check valve main body is protected, and the service life of equipment is prolonged.
When the check valve is used, liquid entering the check valve body 1 sequentially passes through the water inlet 13, the connection port 12, the check cavity 11 and the water outlet 15, when the flowing pressure of the liquid in the check valve body 1 is smaller, the liquid can push the inner check valve disc 21 upwards, so that small-flow liquid flows, when the flowing pressure of the liquid in the check valve body is larger, the liquid can push the outer check valve disc 2 upwards, the liquid flows through the whole connection port, the composite double check valve mode is utilized, the damage condition of the check valve when the check valve is used for flowing fluids with different pressures can be avoided, the check valve body is protected, the service life of equipment is prolonged, meanwhile, in the flowing process of the liquid, an operator is connected with the electric connection between the external power supply 172 and the electromagnetic chuck 17 through the control module 171, the electromagnetic chuck 17 is electrified to generate magnetic force, the iron block 23 is attracted through the magnetic force, so that the outer check valve disc 2 is tightly attached above the connection port 12, at the moment, the using stability of the outer check valve disc 2 is enhanced, the flowing caliber of the liquid can be changed according to the using requirement when the flowing pressure of the liquid is larger, and the using flexibility of the check valve body 1 is increased.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a compound double check valve is moulded to copper, includes check valve body (1), outer check valve disc (2) and interior check valve disc (21), its characterized in that: the top of the check valve main body (1) is fixedly covered with a top cover (10) through a fixing bolt (101), a water inlet (13), a connecting port (12), a check cavity (11) and a water outlet (15) are sequentially formed in the check valve main body (1), the water inlet (13), the connecting port (12), the check cavity (11) and the water outlet (15) are communicated, a waterproof sealing rubber sleeve (16) is fixedly embedded on the upper surface of the connecting port (12), an outer check valve disc (2) is pressed on the upper surface of the waterproof sealing rubber sleeve (16), a guide post (14) is slidingly connected above the outer check valve disc (2) through a synchronizing rod (22), the guide post (14) is welded on the lower surface of the top cover (10), an outer guide cavity (141) is formed in the hollow outer surface wall of the guide post (14), a limit ring (144) is sleeved on the inner sliding sleeve of the outer guide cavity (141), four synchronizing rods (22) are welded on the outer wall of the limit ring (144), an outer spring (4) is welded on the upper surface of the limit ring (144), a guide post (14) is arranged in the middle of the inner guide post (141), the inside of interior direction chamber (143) is connected with connecting rod (211) through interior spring (3), the bottom welding of connecting rod (211) has interior check valve disc (21), interior check valve disc (21) cooperation is run through in the middle part of outer check valve disc (2), and interior check valve disc (21) and the fixed cover of exterior wall of outer check valve disc (2) junction have one deck rubber pad (213).
2. The copper-plastic composite double check valve according to claim 1, further comprising:
a control module (171), and an external power source (172), the control module (171) being electrically coupled to the electromagnetic chuck (17);
the electromagnetic chuck (17) is embedded in the waterproof sealing rubber sleeve (16) in a sealing mode, an iron block (23) is pressed above the electromagnetic chuck (17) through magnetic force absorption, and the iron block (23) is fixed in the bottom end of the outer check valve disc (2).
3. The copper-plastic composite double check valve according to claim 2, further comprising:
the alarm module comprises an alarm lamp (102), and the alarm module is electrically coupled with the control module (171);
the warning lamp (102) comprises a red lamp and a green lamp, the warning lamp (102) is electrically coupled with the control module (171), the red lamp is lightened when the electromagnetic chuck (17) is electrically coupled with the external power supply (172), and the green lamp is lightened when the electromagnetic chuck (17) is not electrically coupled with the external power supply (172);
the warning lamp (102) is fixed above the top cover (10) through threads.
4. The copper-plastic composite double check valve according to claim 1, wherein: the inner guide cavity (143) is welded with an anti-tilting column (142) on the inner top wall, the anti-tilting column (142) is sleeved in the inner spring (3), the anti-tilting column (142) is matched with and inserted in the slot (212), the slot (212) is formed in the upper surface of the inner connecting rod (211), and the depth of the slot (212) is larger than the height of the anti-tilting column (142).
5. The copper-plastic composite double check valve according to claim 1, wherein: the inner spring (3) and the outer spring (4) are compression springs, and the elastic coefficient of the inner spring (3) is larger than that of the outer spring (4).
6. The copper-plastic composite double check valve according to claim 1, wherein: one end of the inner spring (3) is welded on the top wall inside the inner guide cavity (143), and the other end of the inner spring (3) is welded on the top end of the connecting rod (211).
7. The copper-plastic composite double check valve according to claim 1, wherein: the bottom surfaces of the inner check valve disc (21) and the outer check valve disc (2) are positioned on the same horizontal line, and the inner check valve disc (21) and the outer check valve disc (2) are covered right above the connecting port (12).
8. A copper plastic composite double check valve according to claim 2, wherein: the synchronizing rod (22) is L-shaped, and the synchronizing rod (22) is welded between the limiting ring (144) and the outer check valve disc (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811271548.4A CN109404544B (en) | 2018-10-29 | 2018-10-29 | Copper-plastic composite double check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811271548.4A CN109404544B (en) | 2018-10-29 | 2018-10-29 | Copper-plastic composite double check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109404544A CN109404544A (en) | 2019-03-01 |
| CN109404544B true CN109404544B (en) | 2024-02-23 |
Family
ID=65469843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811271548.4A Active CN109404544B (en) | 2018-10-29 | 2018-10-29 | Copper-plastic composite double check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404544B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4210171A (en) * | 1977-11-17 | 1980-07-01 | Rikuta | Automatic controlling valve for maintaining the rate of fluid flow at a constant value |
| CN201764036U (en) * | 2010-05-19 | 2011-03-16 | 浙江超达阀门股份有限公司 | Spring direct action type constant-pressure check valve |
| CN204739266U (en) * | 2015-05-29 | 2015-11-04 | 夏步前 | LNG ( liquefied natural gas ) hangs down resistance automatic control check valve device |
| CN106838397A (en) * | 2015-10-20 | 2017-06-13 | 艾默生过程管理调节技术公司 | Pressure adjustment device with type variable travel stop |
| CN206320361U (en) * | 2016-12-27 | 2017-07-11 | 上海阳一阀门有限公司 | A kind of anti-air-return declines resistance cut-off slow closing check valve |
| CN206943506U (en) * | 2017-07-09 | 2018-01-30 | 宁波华平智控科技股份有限公司 | Flow adjustable check valve |
| CN209041578U (en) * | 2018-10-29 | 2019-06-28 | 镇江市鑫浩塑胶有限公司 | A kind of compound double check valve (DCV) of copper modeling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110061751A1 (en) * | 2009-09-15 | 2011-03-17 | Siam Cast Iron Works Co., Ltd. | Tilting Disc Swing Check Valve |
-
2018
- 2018-10-29 CN CN201811271548.4A patent/CN109404544B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4210171A (en) * | 1977-11-17 | 1980-07-01 | Rikuta | Automatic controlling valve for maintaining the rate of fluid flow at a constant value |
| CN201764036U (en) * | 2010-05-19 | 2011-03-16 | 浙江超达阀门股份有限公司 | Spring direct action type constant-pressure check valve |
| CN204739266U (en) * | 2015-05-29 | 2015-11-04 | 夏步前 | LNG ( liquefied natural gas ) hangs down resistance automatic control check valve device |
| CN106838397A (en) * | 2015-10-20 | 2017-06-13 | 艾默生过程管理调节技术公司 | Pressure adjustment device with type variable travel stop |
| CN206320361U (en) * | 2016-12-27 | 2017-07-11 | 上海阳一阀门有限公司 | A kind of anti-air-return declines resistance cut-off slow closing check valve |
| CN206943506U (en) * | 2017-07-09 | 2018-01-30 | 宁波华平智控科技股份有限公司 | Flow adjustable check valve |
| CN209041578U (en) * | 2018-10-29 | 2019-06-28 | 镇江市鑫浩塑胶有限公司 | A kind of compound double check valve (DCV) of copper modeling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109404544A (en) | 2019-03-01 |
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