CN108396820B - Tee joint four-position water supply device and suction-stroke-free water supply system - Google Patents
Tee joint four-position water supply device and suction-stroke-free water supply system Download PDFInfo
- Publication number
- CN108396820B CN108396820B CN201810532804.4A CN201810532804A CN108396820B CN 108396820 B CN108396820 B CN 108396820B CN 201810532804 A CN201810532804 A CN 201810532804A CN 108396820 B CN108396820 B CN 108396820B
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- Prior art keywords
- cylinder body
- water supply
- water
- spring
- pressure regulating
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 230000001105 regulatory effect Effects 0.000 claims abstract description 32
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 230000007123 defense Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009861 stroke prevention Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/02—Arrangements or adaptations of tanks for water supply for domestic or like local water supply
- E03B11/06—Arrangements or adaptations of tanks for water supply for domestic or like local water supply with air regulators
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/075—Arrangement of devices for control of pressure or flow rate
-
- 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
One aspect of the present invention provides a three-way four-position water supply apparatus, comprising at least: a steady flow tank and a cylinder pressure regulating valve; the water outlet of the steady flow tank is provided with a connecting flange which is used for connecting a water outlet pipeline; the cylinder pressure regulating valve includes: a water outlet is arranged on the side wall of the cylinder; the central hole of the gate is a gate water hole; a flange; and the blind plate is arranged above the flange, is fixedly connected with the flange and is used for sealing one end of the cylinder body. A pressure regulating valve core; one end of the water inlet short pipe is connected with the second round table of the gate in a sleeved mode; the other end of the flow stabilizing tank extends outwards from the outer wall of the flow stabilizing tank and is fixedly connected with a flange plate, and the flange plate is used for being connected with a water inlet main pipe. Another aspect of the present invention is to provide a water supply system without suction side, which at least comprises one three-way four-position water supply device as described above.
Description
Technical Field
The invention relates to a water supply device, in particular to a three-way four-position water supply device and a suction-free water supply system.
Background
The conventional non-negative pressure water supply apparatus is as shown in fig. 6: the vacuum suppressor 32 is arranged at the upper part of the steady flow tank 31, and is used for avoiding negative pressure of the water supply system, and the principle is as follows: when the water consumption of the tap water pipe network is smaller than the water consumption in the water consumption peak period, water in the steady flow tank is regulated to serve as a supplementary water source to still supply water normally, at the moment, air enters the steady flow tank through the vacuum inhibitor, the negative pressure of the tap water pipe network is eliminated, and the system is restored to a normal state after the water consumption peak period. And the passive defense measures are that after negative pressure is generated in the system, air is discharged into the steady flow tank by the vacuum inhibitor for elimination.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an aspect of the present invention is to provide a three-way four-position water supply device for solving the above-described problems of the prior art.
To achieve the above and other related objects, one aspect of the present invention provides a three-way four-position water supply device, comprising at least: a steady flow tank and a cylinder pressure regulating valve;
the water outlet of the steady flow tank is provided with a connecting flange which is used for connecting a water outlet pipeline;
the cylinder pressure regulating valve includes:
a water outlet is arranged on the side wall of the cylinder; one end of the cylinder body extends outwards from the outer wall of the steady flow tank;
the gate is a torus with a first round platform and a second round platform at two ends respectively, and a central hole of the torus is a gate water hole; the excircle of the first round table is connected with the inner cavity of the water inlet end of the cylinder body in a matched manner;
the flange is arranged at the other end of the cylinder body opposite to the water inlet end and is connected with the cylinder body in a sleeved mode;
and the blind plate is arranged above the flange, fixedly connected with the flange and used for sealing one end of the cylinder body.
The pressure regulating valve core is arranged in the inner cavity of the cylinder body, when the water inlet pressure of the water inlet end of the cylinder body is smaller than a set value, the pressure regulating valve core seals the water hole of the gate, and when the water inlet pressure of the water inlet end of the cylinder body is larger than the set value, the pressure regulating valve core is opened to enable the water hole of the gate to be communicated with the water outlet;
one end of the water inlet short pipe is connected with the second round table of the gate in a sleeved mode; the other end of the flow stabilizing tank extends outwards from the outer wall of the flow stabilizing tank and is fixedly connected with a flange plate, and the flange plate is used for being connected with a water inlet main pipe;
a one-way air compensating valve is arranged between the water inlet short pipe and the steady flow tank.
Preferably, the number of the water outlets is 4, and the water outlets are uniformly distributed on the side wall of the cylinder.
Preferably, the pressure regulating valve core includes:
the flashboard is arranged in the inner cavity of the cylinder body and above the brake port, is cylindrical, and the excircle of the flashboard is in sliding fit with the inner cavity of the cylinder body;
one end of the adjusting rod is fixedly connected with the flashboard;
the adjusting blocks are arranged in the inner cavity of the cylinder body and above the flashboard, and are sleeved on the adjusting rods in a series manner;
the spring seat is arranged above the adjusting block and is sleeved and fixed with the adjusting rod;
the spring is arranged between the spring seat and the blind plate, and the lower part of the spring is sleeved with the adjusting rod.
Further preferably, the spring seat is fixed on the adjusting rod through a jackscrew.
Preferably, the pressure regulating valve core includes:
the flashboard is arranged in the inner cavity of the cylinder body and above the brake port, is cylindrical, and the excircle of the flashboard is in sliding fit with the inner cavity of the cylinder body;
one end of the spring guide post is fixedly connected with the flashboard;
the spring pressure regulating disc is arranged in the inner cavity of the cylinder body and is screwed with the inner cavity of the cylinder body through threads; the center of the guide hole is provided with a guide hole matched with the spring guide post; the upper part of the spring guide post penetrates into the guide hole;
the adjusting spring is sleeved on the spring guide post, the upper end of the adjusting spring abuts against the spring pressure adjusting disc, and the lower end of the adjusting spring abuts against the flashboard.
Preferably, a pressure sensor is arranged on the steady flow tank.
Preferably, a bleed valve is arranged at the upper part of the steady flow tank.
Another aspect of the present invention is to provide a water supply system without suction side, which at least comprises one three-way four-position water supply device as described above.
The three-way four-position device has the following technical effects:
firstly, the diameter of the cylinder body of the three-way four-position device is far larger than that of the water inlet main pipe, so that the device has the water outlet diversion effect,
the water pump can not generate vortex, cutoff, air resistance and other phenomena when running, and has the function of stabilizing flow.
Secondly, the internal structure is used as a valve core to play a role in opening the gate, and has the functions of (1) preventing suction stroke generated by the water pump from reaching the gate, namely, suction stroke prevention function, and avoiding the precondition of negative pressure generation. (2) According to the pressure and flow of the incoming water of the main water inlet pipe, the valve opening resistance is set, so that the water inlet pipe network can avoid water inlet under no pressure, the water pump can generate suction stroke, the opening resistance has no energy waste, the energy transfer and partial pressure function is realized, and the problem of a low pressure area at the downstream of the water supply network is reduced.
The device is provided with a built-in water outlet, the size and the position of the opening, the opening stroke of the gate plate, the thickness of the gate plate and the gate guide barrel are mutually combined, so that the back surface of the gate plate is outside the suction acting force generated by the suction stroke of the water pump, and the valve plate can freely fall down to close the valve by self gravity under the condition of not being influenced by any external force as long as the pressure of the water inlet pipe network is smaller than the set pressure of the valve. The water in the water inlet pipe network is isolated from the communicated water in the three-way four-position device, so that all external factors and conditions that the suction stroke of the water pump is generated on the municipal pipe network to form negative pressure or a low-pressure area are fundamentally eliminated, and the safe operation of the municipal water supply pipe network is ensured.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of a mechanism of embodiment 2 of the present invention;
fig. 3 is a schematic structural view of a cylinder type pressure regulating valve in embodiment 1;
FIG. 4 is a part view of the gate in example 1 and example 2;
fig. 5 is a schematic structural view of a cylinder type pressure regulating valve in embodiment 2;
FIG. 6 is a block diagram of a prior art non-negative pressure water supply apparatus;
FIG. 7 is a schematic structural diagram of embodiment 3 of the present invention;
fig. 1, 3, and 4: the device comprises a flange 1, a blind plate 2, a spring 3, a spring seat 4, a jackscrew 5, an adjusting rod 6, an adjusting block 7, a cylinder 8, a flashboard 9, a water outlet 10, a flashboard 11, a water inlet short pipe 12, a flange plate 13, a one-way air supplementing valve 14, a first round table 15, a second round table 16, a water hole of the flashboard 17, a pressure sensor 18, a gas releasing valve 19, a steady flow tank 20 and a connecting flange 21;
fig. 2 and 5: a 101 flange, a 102 blind plate, a 103 spring pressure regulating disc, a 104 regulating spring, a 105 spring guide pillar, a 106 barrel, a 107 flashboard, a 108 gate, a 109 water inlet short pipe, a 110 flange and a 111 water inlet;
in fig. 6: 31 steady flow tank, 32 vacuum suppressor;
in fig. 7: a 41 three-way four-position water supply device and a 42 water supply pump set.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1 to 7. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Example 1: referring to fig. 1, 3 and 4, an aspect of the present invention provides a three-way four-position water supply device, at least including: a steady flow tank 20 and a cylinder pressure regulating valve;
the water outlet of the steady flow tank 20 is provided with a connecting flange 21 for connecting a water outlet pipeline;
the cylinder pressure regulating valve includes:
the side wall of the cylinder body 8 is provided with water outlets 10, and the total number of the water outlets 10 is 4 and the water outlets are uniformly distributed on the side wall of the cylinder body 8.
One end of the cylinder body 8 extends outwards from the outer wall of the steady flow tank 20;
the gate 11 is a ring body with a first round table 15 and a second round table 16 at two ends, and a central hole is a gate water hole 17; the outer circle of the first round table 15 is connected with the inner cavity of the water inlet end of the cylinder body 8 in a matching way;
the flange 1 is arranged at the other end of the cylinder 8 opposite to the water inlet end and is connected with the cylinder 8 in a sleeved mode;
the blind plate 2 is arranged above the flange 1, fixedly connected with the flange 1 and used for sealing one end of the cylinder 8.
The pressure regulating valve core is arranged in the inner cavity of the cylinder body 8, when the water inlet pressure of the water inlet end of the cylinder body 8 is smaller than a set value, the pressure regulating valve core seals the gate water hole 17, and when the water inlet pressure of the water inlet end of the cylinder body 8 is larger than the set value, the pressure regulating valve core is opened to enable the gate water hole 17 to be communicated with the water outlet 10;
the pressure regulating valve core includes:
the flashboard 9 is arranged in the inner cavity of the cylinder body 8 and above the flashboard 11, is cylindrical, and is in sliding fit with the inner cavity of the cylinder body 8;
one end of the adjusting rod 6 is fixedly connected with the flashboard 9;
the adjusting blocks 7 are arranged in the inner cavity of the cylinder 8 and above the flashboard 9, and are sleeved on the adjusting rods 6 in series;
the spring seat 4 is arranged above the adjusting block 7 and is sleeved and fixed with the adjusting rod 6; the spring seat 4 is fixed on the adjusting rod 6 through a jackscrew 5.
The spring 3 is arranged between the spring seat 4 and the blind plate 2, and the lower part of the spring is sleeved with the adjusting rod 6.
One end of the water inlet short pipe 12 is sleeved and connected with the second round table 16 of the gate 11; the other end of the flow stabilizing tank 20 protrudes outwards from the outer wall of the flow stabilizing tank and is fixedly connected with a flange plate 13, and the flange plate 13 is used for being connected with a water inlet main pipe;
a one-way air compensating valve 14 is arranged between the water inlet short pipe 12 and the steady flow tank 20.
Example 2: as shown in fig. 2, 4 and 5: embodiment 2 is different from embodiment 1 in the structure of the pressure regulating valve spool, and in embodiment 2:
the pressure regulating valve core includes:
the flashboard 107 is arranged in the inner cavity of the barrel 106 and above the flashboard 108, is cylindrical, and the excircle of the flashboard is in sliding fit with the inner cavity of the barrel 106;
a spring guide post 105, one end of which is fixedly connected with the shutter 107;
the spring pressure adjusting disc 103 is arranged in the inner cavity of the barrel 106 and is screwed with the inner cavity of the barrel 106 through threads; a guide hole matched with the spring guide post 105 is arranged at the center of the guide hole; the upper part of the spring guide post 105 penetrates into the guide hole;
the adjusting spring 104 is sleeved on the spring guide post 105, the upper end of the adjusting spring abuts against the spring pressure adjusting disc 103, and the lower end of the adjusting spring abuts against the flashboard 107.
Example 3: as shown in fig. 7: another aspect of the present invention is to provide a no-suction-side water supply system comprising one of the three-way four-position water supply devices 41 and a water supply pump set 42 described above.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. A three-way four-position water supply device, comprising at least: a steady flow tank and a cylinder pressure regulating valve;
the water outlet of the steady flow tank is provided with a connecting flange which is used for connecting a water outlet pipeline;
the cylinder pressure regulating valve includes:
a water outlet is arranged on the side wall of the cylinder; one end of the cylinder body extends outwards from the outer wall of the steady flow tank;
the gate is a torus with a first round platform and a second round platform at two ends respectively, and a central hole of the torus is a gate water hole; the excircle of the first round table is connected with the inner cavity of the water inlet end of the cylinder body in a matched manner;
the flange is arranged at the other end of the cylinder body opposite to the water inlet end and is connected with the cylinder body in a sleeved mode;
the blind plate is arranged above the flange, is fixedly connected with the flange and is used for sealing one end of the cylinder;
the pressure regulating valve core is arranged in the inner cavity of the cylinder body, when the water inlet pressure of the water inlet end of the cylinder body is smaller than a set value, the pressure regulating valve core seals the gate water hole, and when the water inlet pressure of the water inlet end of the cylinder body is larger than the set value, the pressure regulating valve core is opened to enable the gate water hole to be communicated with the water outlet of the cylinder body;
one end of the water inlet short pipe is connected with the second round table of the gate in a sleeved mode; the other end of the flow stabilizing tank extends outwards from the outer wall of the flow stabilizing tank and is fixedly connected with a flange plate, and the flange plate is used for being connected with a water inlet main pipe;
a one-way air compensating valve is arranged between the water inlet short pipe and the steady flow tank.
2. The three-way four-position water supply device according to claim 1, wherein: the number of the water outlets is 4, and the water outlets are uniformly distributed on the side wall of the cylinder body.
3. The three-way four-position water supply device according to claim 1, wherein: the pressure regulating valve core includes:
the flashboard is arranged in the inner cavity of the cylinder body and above the brake port, is cylindrical, and the excircle of the flashboard is in sliding fit with the inner cavity of the cylinder body;
one end of the adjusting rod is fixedly connected with the flashboard;
the adjusting blocks are arranged in the inner cavity of the cylinder body and above the flashboard, and are sleeved on the adjusting rods in a series manner;
the spring seat is arranged above the adjusting block and is sleeved and fixed with the adjusting rod;
the spring is arranged between the spring seat and the blind plate, and the lower part of the spring is sleeved with the adjusting rod.
4. A three-way four-position water supply device according to claim 3, wherein: the spring seat is fixed on the adjusting rod through a jackscrew.
5. The three-way four-position water supply device according to claim 1, wherein: the pressure regulating valve core includes:
the flashboard is arranged in the inner cavity of the cylinder body and above the brake port, is cylindrical, and the excircle of the flashboard is in sliding fit with the inner cavity of the cylinder body;
one end of the spring guide post is fixedly connected with the flashboard;
the spring pressure regulating disc is arranged in the inner cavity of the cylinder body and is screwed with the inner cavity of the cylinder body through threads; the center of the guide hole is provided with a guide hole matched with the spring guide post; the upper part of the spring guide post penetrates into the guide hole;
the adjusting spring is sleeved on the spring guide post, the upper end of the adjusting spring abuts against the spring pressure adjusting disc, and the lower end of the adjusting spring abuts against the flashboard.
6. The three-way four-position water supply device according to claim 3 or 5, wherein: and a pressure sensor is arranged on the steady flow tank.
7. The three-way four-position water supply device according to claim 3 or 5, wherein: and a bleed valve is arranged at the upper part of the steady flow tank.
8. A no-suction-side water supply system, characterized in that: the water supply system comprises the three-way four-position water supply device of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810532804.4A CN108396820B (en) | 2018-05-29 | 2018-05-29 | Tee joint four-position water supply device and suction-stroke-free water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810532804.4A CN108396820B (en) | 2018-05-29 | 2018-05-29 | Tee joint four-position water supply device and suction-stroke-free water supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108396820A CN108396820A (en) | 2018-08-14 |
| CN108396820B true CN108396820B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810532804.4A Active CN108396820B (en) | 2018-05-29 | 2018-05-29 | Tee joint four-position water supply device and suction-stroke-free water supply system |
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| Country | Link |
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| CN (1) | CN108396820B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3969791A4 (en) * | 2019-05-17 | 2023-04-26 | Dayco IP Holdings, LLC | Fuel tank protector valve and engine systems having same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920004502U (en) * | 1990-08-20 | 1992-03-25 | 산 린 시 | Pneumatic water supply device for high-rise buildings |
| CN103669483A (en) * | 2013-12-08 | 2014-03-26 | 安徽舜禹水务实业有限公司 | Box type non-negative-pressure variable frequency water supply equipment |
| CN107700601A (en) * | 2017-10-31 | 2018-02-16 | 安徽舜禹水务股份有限公司 | Totally-enclosed Intelligent pipe net laminating water service system |
| CN208309695U (en) * | 2018-05-29 | 2019-01-01 | 山东科源供排水设备工程有限公司 | A kind of three-way four-position water supply device and a kind of non-suction head water system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8408242B2 (en) * | 2009-02-04 | 2013-04-02 | Edward S Chang | Overflow shutoff valve |
| CH702905A1 (en) * | 2010-03-26 | 2011-09-30 | Olaer Schweiz Ag | Pressure compensating device for liquid flowed through systems. |
-
2018
- 2018-05-29 CN CN201810532804.4A patent/CN108396820B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920004502U (en) * | 1990-08-20 | 1992-03-25 | 산 린 시 | Pneumatic water supply device for high-rise buildings |
| CN103669483A (en) * | 2013-12-08 | 2014-03-26 | 安徽舜禹水务实业有限公司 | Box type non-negative-pressure variable frequency water supply equipment |
| CN107700601A (en) * | 2017-10-31 | 2018-02-16 | 安徽舜禹水务股份有限公司 | Totally-enclosed Intelligent pipe net laminating water service system |
| CN208309695U (en) * | 2018-05-29 | 2019-01-01 | 山东科源供排水设备工程有限公司 | A kind of three-way four-position water supply device and a kind of non-suction head water system |
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|---|---|
| CN108396820A (en) | 2018-08-14 |
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