CN107420570B - Water-saving faucet - Google Patents
Water-saving faucet Download PDFInfo
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- CN107420570B CN107420570B CN201710362393.4A CN201710362393A CN107420570B CN 107420570 B CN107420570 B CN 107420570B CN 201710362393 A CN201710362393 A CN 201710362393A CN 107420570 B CN107420570 B CN 107420570B
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- valve body
- water
- main valve
- auxiliary valve
- auxiliary
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- 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
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
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- 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
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/029—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with two or more gates
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- 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
- F16K3/30—Details
- F16K3/32—Means for additional adjustment of the rate of flow
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/411—Water saving techniques at user level
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a water-saving faucet, which consists of a main valve body, a main valve movable ceramic wafer, a main valve fixed ceramic wafer, an auxiliary valve body, an auxiliary valve movable ceramic wafer, an auxiliary valve fixed ceramic wafer, a shell and a handle, wherein the main valve body is provided with a main valve body hole; the main valve movable ceramic plate and the fixed ceramic plate are provided with single water through holes, and the auxiliary valve movable ceramic plate and the fixed ceramic plate are provided with double water through holes. The shell is of a double-valve-body structure, the main valve body is positioned at the upper part of the auxiliary valve body, the main valve body bears the pressure from a pipe network, and the auxiliary valve body bears the pressure of the retained water in the upper water outlet channel; an upper water outlet channel is formed between the main valve body and the auxiliary valve body, and a lower water outlet channel is formed between the auxiliary valve body and the water outlet; the main valve body and the auxiliary valve body are connected with the handle into a whole, the main valve body and the auxiliary valve body move simultaneously when the handle is rotated, and the ceramic plates in the main valve body and the ceramic plates in the auxiliary valve body are staggered by an angle; the tap avoids the loss of invalid water through the double decompression effect of the double valve bodies.
Description
Technical Field
The invention relates to the field of public facilities and water-saving equipment, in particular to a water-saving faucet.
Background
The water faucet is a water using appliance with the largest number and the widest application range in a building, the performance of the water faucet has great influence on the actual water saving effect, and the development of the water-saving water faucet has important significance. At present, domestic water-saving faucets are various, and a large number of water-saving faucets are launched into the market, such as induction faucets, self-rebounding faucets and the like, although the water-saving faucets can play a certain water-saving function, the cost is high, and the water-saving faucets are not beneficial to being used in public places with concentrated water.
One of the water-saving connotations of the water faucet is that the loss of invalid water is reduced as much as possible on the premise of meeting the water consumption requirements of users; by non-effective water is meant that portion of the water that is not needed by the user but is wasted during the water use process. This includes water lost due to the limitations of the faucet itself from the manufacturing process, manufacturing materials and manufacturing techniques; the water-saving tap comprises unconsciously wasted water caused by the water using habit of people, such as the retained water in the water outlet channel of the tap which is wasted after the water using is finished; and also includes water lost in the design and use process, such as overpressure outflow water leakage phenomenon of high-rise buildings and the like. The invention designs a water-saving faucet aiming at the situation, and the water-saving faucet can effectively prevent the waste of the retained water in the water outlet channel after the water is used up on the premise of not changing the normal water using habit of people, simultaneously solves the defects of water dripping and water leakage of the traditional faucet and improves the utilization rate of water resources.
Disclosure of Invention
In order to avoid the defects of the prior art and overcome the problems of water retention loss in a water outlet port of the water faucet in the using process and water dripping and water leakage after the water faucet is closed, the invention provides a water-saving water faucet.
The technical scheme adopted by the invention for solving the technical problems is as follows: the double-valve-body structure is adopted in the shell, the main valve body is positioned at the upper part of the auxiliary valve body, the main valve body bears the pressure from a pipe network, the auxiliary valve body bears the pressure of retained water in an upper water outlet channel, an upper water outlet channel is formed between the main valve body and the auxiliary valve body, and a lower water outlet channel is formed between the auxiliary valve body and a water outlet;
the main valve movable ceramic plate, the main valve fixed ceramic plate and the sealing ring are positioned in the main valve body, the main valve fixed ceramic plate is positioned below the main valve movable ceramic plate, a main valve cover is connected with the upper part of the main valve body and is fixedly connected with the upper part of the handle, the sealing ring is arranged between the lower part of the main valve body and the inner wall of the shell, the main valve movable ceramic plate and the main valve fixed ceramic plate are respectively provided with a single water through hole, the water through holes are of a fan-shaped structure, and the central angle of each fan-shaped water through hole is 85 degrees;
the auxiliary valve movable ceramic piece, the auxiliary valve fixed ceramic piece and the sealing ring are positioned in the auxiliary valve body, the auxiliary valve fixed ceramic piece is positioned below the auxiliary valve movable ceramic piece, the auxiliary valve cover is connected with the lower part of the auxiliary valve body and fixedly connected with the lower part of the handle, the sealing ring is arranged at the joint of the auxiliary valve cover and the handle, two through water holes are respectively arranged on the auxiliary valve movable ceramic piece and the auxiliary valve fixed ceramic piece, two water holes on each ceramic piece are separated by 180 degrees, the water holes are of a fan-shaped structure, and the central angle of each fan-shaped water hole is 70 degrees;
the main valve body and the auxiliary valve body are connected with the handle into a whole, the main valve body and the auxiliary valve body move simultaneously when the handle is rotated, and the central angles of the fan-shaped water through holes in the ceramic plates in the main valve body and the auxiliary valve body are different by 15 degrees.
The area of the water through hole of the auxiliary valve body is larger than that of the water through hole of the main valve body.
The main valve movable ceramic chip and the main valve fixed ceramic chip are coaxially arranged with the auxiliary valve movable ceramic chip and the auxiliary valve fixed ceramic chip.
After the water inlet of the water-saving faucet is connected with a pipeline of a pipe network, when the faucet is opened from a closed state, the operating handle rotates towards the direction of opening the faucet until the water through holes on the main valve movable ceramic plate and the main valve fixed ceramic plate are aligned, the valve body of the main valve starts to discharge water, but the water outlet does not discharge water at the moment, the handle is continuously rotated, the water through holes on the auxiliary valve movable ceramic plate and the auxiliary valve fixed ceramic plate start to be aligned, the water outlet starts to discharge water, and when the handle is continuously rotated towards the opening direction, the water flow gradually increases. When the water tap is closed from an open state, the operating handle rotates towards the direction of closing the water tap, when the rotating handle does not discharge water from the water outlet, the water through holes on the auxiliary valve movable ceramic plate and the auxiliary valve fixed ceramic plate are completely staggered, the handle is continuously rotated, at the moment, the water through holes on the main valve movable ceramic plate and the main valve fixed ceramic plate are completely staggered, and the water tap is completely closed.
Advantageous effects
The invention provides a water-saving tap, wherein a main valve body and an auxiliary valve body are connected into a whole through a handle, a double-valve-body structure is arranged in a tap shell, the main valve body is positioned at the upper part and bears the pressure from a pipe network, the auxiliary valve body is positioned at the lower part and bears the pressure of retained water in an upper water outlet channel, meanwhile, the auxiliary valve body can bear the pressure of overpressure water supply exceeding the rated flow pressure value of the main valve, an upper water outlet channel is formed between the main valve body and the auxiliary valve body, and a lower water outlet channel is formed between the auxiliary valve body and a water outlet. The main valve body and the auxiliary valve body are connected with the handle into a whole, and the main valve body and the auxiliary valve body move simultaneously when the handle is rotated, so that the habit of using the faucet normally by people is not changed.
When the tap is closed, the auxiliary valve movable ceramic chip and the auxiliary valve fixed ceramic chip are completely staggered in advance relative to the main valve movable ceramic chip and the main valve fixed ceramic chip, the mounting position of the valve body of the auxiliary valve is close to the water outlet of the tap, and water in the lower water outlet channel can completely flow into a container for containing water when the handle rotates to the state that the main valve movable ceramic chip and the main valve fixed ceramic chip are completely staggered, so that the loss of invalid water is avoided. When the main valve movable ceramic plate and the main valve fixed ceramic plate are worn to a certain extent or the pressure in the tap water pipe network is higher than the pressure value under the rated flow of the main valve, the single-valve water faucet can generate the phenomena of water dripping and water leakage. The water-saving tap of the invention adopts a double-valve body structure, when the main valve body leaks water, the auxiliary valve body can bear the pressure exceeding the normal water supply pressure value, and the problems of water dripping and water leakage can be effectively solved.
Drawings
A water saving type faucet according to the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
FIG. 1 is a schematic view of a water-saving faucet structure according to the present invention.
Fig. 2 is a schematic view of the main valve body of the water-saving faucet of the present invention.
Fig. 3 is a schematic structural view of an auxiliary valve body of a water-saving faucet according to the present invention.
Fig. 4 is a schematic diagram showing the positions of the movable ceramic plate and the fixed ceramic plate of the main valve and the auxiliary valve when the faucet is closed.
FIG. 5 is a schematic diagram showing the relative positions of the movable ceramic plate and the fixed ceramic plate of the main valve and the auxiliary valve when the main valve body is opened and the auxiliary valve body is about to be opened.
FIG. 6 is a schematic diagram showing the positions of the movable ceramic plate and the fixed ceramic plate of the main valve and the auxiliary valve when the faucet is half-opened.
Fig. 7 is a schematic diagram showing the positions of the movable ceramic plate and the fixed ceramic plate of the main valve and the auxiliary valve when the faucet is fully opened.
In the figure:
1. handle 2, shell 3, main valve body 4, auxiliary valve body 5, main valve bonnet 6, main valve movable ceramic chip 7, main valve fixed ceramic chip 8, sealing ring 9, auxiliary valve movable ceramic chip 10, auxiliary valve fixed ceramic chip 11, auxiliary valve bonnet 12 and sealing ring
A is a water inlet, B is a water outlet, C is an upper water outlet channel, D is a lower water outlet channel
Detailed Description
The embodiment is a water-saving faucet.
Referring to fig. 1 to 7, the water-saving faucet of the present embodiment is composed of a handle 1, a housing 2, a main valve body 3, an auxiliary valve body 4, a main valve cover 5, a main valve movable ceramic plate 6, a main valve fixed ceramic plate 7, a sealing ring 8, an auxiliary valve movable ceramic plate 9, an auxiliary valve fixed ceramic plate 10, an auxiliary valve cover 11, and a sealing ring 12; a is a water inlet, B is a water outlet, C is an upper water outlet channel, and D is a lower water outlet channel. The shell of the water tap is provided with a double-valve structure; the main valve body 3 is positioned on the upper part of the auxiliary valve body 4, the main valve body 3 bears the pressure from a pipe network, the auxiliary valve body 4 bears the pressure of the retained water in the upper water outlet channel, an upper water outlet channel is formed between the main valve body 3 and the auxiliary valve body 4, and a lower water outlet channel is formed between the auxiliary valve body 4 and the water outlet. The main valve movable ceramic plate 6, the main valve fixed ceramic plate 7 and the sealing ring 8 are positioned inside the main valve body 3; the main valve fixed ceramic plate 7 is arranged below the main valve movable ceramic plate 6, and the main valve cover 5 is connected with the upper part of the main valve body 3 and fixedly connected with the upper part of the handle 1; a sealing ring 8 is arranged between the lower part of the main valve body 3 and the inner wall of the shell 2, a single water through hole is respectively arranged on the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7, the water through hole is of a fan-shaped structure, and the central angle of the fan-shaped water through hole is 85 degrees. The auxiliary valve movable ceramic plate 9, the auxiliary valve fixed ceramic plate 10 and the sealing ring 12 are positioned inside the auxiliary valve body 4; the auxiliary valve fixed ceramic plate 10 is arranged below the auxiliary valve movable ceramic plate 9, and the auxiliary valve cover 11 is connected with the lower part of the auxiliary valve body 4 and fixedly connected with the lower part of the handle 1; the joint of the auxiliary valve cover 11 and the handle 1 is provided with a sealing ring 12. Two water through holes are respectively arranged on the auxiliary valve movable ceramic piece 9 and the auxiliary valve fixed ceramic piece 10, two water through holes on each ceramic piece are separated by 180 degrees, the water through holes are of fan-shaped structures, and the central angle of each fan-shaped water through hole is 70 degrees. The main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7 are coaxially arranged with the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10.
The main valve body 3 and the auxiliary valve body 4 are connected with the handle into a whole, when the handle is rotated, the main valve body 3 and the auxiliary valve body 4 move simultaneously, and the central angles of the fan-shaped water through holes on the ceramic plates in the main valve body 3 and the auxiliary valve body 4 are different by 15 degrees. The sectional area of each section of the upper water outlet channel C is gradually increased from top to bottom, so that the area of the water through hole of the auxiliary valve body 4 is larger than that of the water through hole of the main valve body 3, the flow speed at the water outlet B can be reduced, and the use is convenient.
In this embodiment, after the faucet is connected to the tap water pipe, the main valve body 3 bears the pressure from the tap water pipe, the sub valve body 4 bears the pressure of the retained water in the upper water outlet channel, when the water is supplied by overpressure or the ceramic plate is worn, the main valve body 3 may leak water, but the water only flows to the upper water outlet channel C, the lower valve is closed, the water does not flow out from the water outlet B, the sub valve body 4 bears the pressure exceeding the rated flow pressure value of the main valve body 3, and the double valve body structure effectively avoids dripping and leaking water.
When the water faucet is opened, the water faucet is in a completely closed state, the relative positions of the water through holes of the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7 are completely staggered, the water through holes of the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10 are completely staggered, and no water flows out of the water outlet B at the moment; the handle 1 is rotated towards the opening direction of the faucet, the water through holes of the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7 are staggered, the water through holes of the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10 are still in a completely staggered state, and no water flows out from the water outlet B at the moment; when the handle 1 is rotated continuously in the opening direction, the water through holes of the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7 are staggered, the water through holes of the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10 are also staggered, and at the moment, water flows out from the water outlet B. The handle 1 is continuously rotated towards the opening direction, the water flow at the water outlet B is gradually increased until the faucet is completely opened, the water through holes of the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7 are completely aligned, the water through holes of the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10 are completely aligned, and at the moment, the water flow is maximum.
When the water faucet is closed, the water faucet is in a fully opened state, the water through holes of the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7 are completely aligned, the water through holes of the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10 are completely aligned, and at the moment, the water flow is maximum; the handle 1 is rotated towards the closing direction of the faucet, the water flow at the water outlet B is gradually reduced, the water through holes of the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7 are staggered, and the water through holes of the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10 are staggered. Continuing to rotate the handle 1 towards the closing direction, gradually reducing the water flow at the water outlet B until no water flows out from the water outlet B, enabling the water through holes of the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10 to be in a completely staggered state, and staggering the water through holes of the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7; the handle 1 is continuously rotated towards the closing direction, the water through holes of the main valve movable ceramic plate 6 and the main valve fixed ceramic plate 7 are completely staggered, the water through holes of the auxiliary valve movable ceramic plate 9 and the auxiliary valve fixed ceramic plate 10 are completely staggered, and the faucet is completely closed.
When the faucet is opened, the sub-valve body 4 delays the water discharge with respect to the main-valve body 3. When the faucet is closed, the auxiliary valve body 4 is cut off in advance relative to the main valve body 3, the mounting position of the auxiliary valve body 4 is close to the water outlet B of the faucet, when the faucet is completely closed, water in the lower water outlet channel D flows out of the water outlet B completely when flowing out of the water container, and waste of residual water in the lower water outlet channel D can be effectively avoided.
Claims (1)
1. A water-saving faucet is characterized in that: comprises a handle, a shell, a main valve body, an auxiliary valve body, a main valve bonnet, a main valve movable ceramic chip, a main valve fixed ceramic chip, a sealing ring, an auxiliary valve movable ceramic chip, an auxiliary valve fixed ceramic chip, an auxiliary valve bonnet and a sealing ring, wherein the shell is of a double-valve body structure, the main valve body is positioned at the upper part of the auxiliary valve body, the main valve body bears the pressure from a pipe network, the auxiliary valve body bears the pressure of the retained water in the upper water outlet channel, an upper water outlet channel is formed between the main valve body and the auxiliary valve body, and a lower water outlet channel is formed between the auxiliary valve body and the water outlet; the main valve movable ceramic plate, the main valve fixed ceramic plate and the sealing ring are positioned in the main valve body, the main valve fixed ceramic plate is positioned below the main valve movable ceramic plate, a main valve cover is connected with the upper part of the main valve body and is fixedly connected with the upper part of the handle, the sealing ring is arranged between the lower part of the main valve body and the inner wall of the shell, the main valve movable ceramic plate and the main valve fixed ceramic plate are respectively provided with a single water through hole, the water through holes are of a fan-shaped structure, and the central angle of each fan-shaped water through hole is 85 degrees; the auxiliary valve movable ceramic piece, the auxiliary valve fixed ceramic piece and the sealing ring are positioned in the auxiliary valve body, the auxiliary valve fixed ceramic piece is positioned below the auxiliary valve movable ceramic piece, the auxiliary valve cover is connected with the lower part of the auxiliary valve body and fixedly connected with the lower part of the handle, the sealing ring is arranged at the joint of the auxiliary valve cover and the handle, two water through holes are respectively arranged on the auxiliary valve movable ceramic piece and the auxiliary valve fixed ceramic piece, two water through holes on each ceramic piece are separated by 180 degrees, the water through holes are of fan-shaped structures, and the central angle of each fan-shaped water through hole is 70 degrees; the main valve body and the auxiliary valve body are connected with the handle into a whole, the main valve body and the auxiliary valve body move simultaneously when the handle is rotated, and the central angles of the fan-shaped water through holes on the ceramic plates in the main valve body and the auxiliary valve body are different by 15 degrees; the area of the auxiliary valve body water through hole is larger than that of the main valve body water through hole; the main valve movable ceramic chip and the main valve fixed ceramic chip are coaxially arranged with the auxiliary valve movable ceramic chip and the auxiliary valve fixed ceramic chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362393.4A CN107420570B (en) | 2017-05-22 | 2017-05-22 | Water-saving faucet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362393.4A CN107420570B (en) | 2017-05-22 | 2017-05-22 | Water-saving faucet |
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| Publication Number | Publication Date |
|---|---|
| CN107420570A CN107420570A (en) | 2017-12-01 |
| CN107420570B true CN107420570B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710362393.4A Active CN107420570B (en) | 2017-05-22 | 2017-05-22 | Water-saving faucet |
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| CN (1) | CN107420570B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2286260Y (en) * | 1996-12-06 | 1998-07-15 | 郑斌 | Multi-function ceramic sheet tap |
| CN1888501A (en) * | 2006-06-30 | 2007-01-03 | 珠海市佳德厨卫产品有限公司 | Tap |
| CN202914782U (en) * | 2012-11-12 | 2013-05-01 | 廖选明 | Water-saving faucet |
| WO2015043080A1 (en) * | 2013-09-24 | 2015-04-02 | 吴跃刚 | Time delay automatic closing valve not affected by water quality |
-
2017
- 2017-05-22 CN CN201710362393.4A patent/CN107420570B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2286260Y (en) * | 1996-12-06 | 1998-07-15 | 郑斌 | Multi-function ceramic sheet tap |
| CN1888501A (en) * | 2006-06-30 | 2007-01-03 | 珠海市佳德厨卫产品有限公司 | Tap |
| CN202914782U (en) * | 2012-11-12 | 2013-05-01 | 廖选明 | Water-saving faucet |
| WO2015043080A1 (en) * | 2013-09-24 | 2015-04-02 | 吴跃刚 | Time delay automatic closing valve not affected by water quality |
Non-Patent Citations (1)
| Title |
|---|
| 郭鹏程 ; .新型节水阀的研究.2015,(16),全文. * |
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| CN107420570A (en) | 2017-12-01 |
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