CN113914421B - Non-negative pressure water supply device - Google Patents
Non-negative pressure water supply device Download PDFInfo
- Publication number
- CN113914421B CN113914421B CN202111216354.6A CN202111216354A CN113914421B CN 113914421 B CN113914421 B CN 113914421B CN 202111216354 A CN202111216354 A CN 202111216354A CN 113914421 B CN113914421 B CN 113914421B
- Authority
- CN
- China
- Prior art keywords
- bevel gear
- transmission rod
- rod
- inlet pipe
- threaded
- 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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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 210000001503 joint Anatomy 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 241000883990 Flabellum Species 0.000 description 11
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
- B08B9/0808—Cleaning containers having tubular shape, e.g. casks, barrels, drums by methods involving the use of tools, e.g. by brushes, scrapers
-
- 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
Landscapes
- 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)
- Cleaning In General (AREA)
Abstract
The invention discloses a non-negative pressure water supply device, which comprises a steady flow tank main body, wherein a water inlet pipe is arranged at the upper part of one end of the steady flow tank main body, fan blades are arranged in the water inlet pipe and are arranged on a rotating shaft, a first bevel gear is arranged at the end part of the rotating shaft, a second bevel gear is arranged below the first bevel gear and is arranged on a first transmission rod, a second transmission rod is arranged below the first transmission rod, a third bevel gear is arranged at the lower end of the second transmission rod, a fourth bevel gear is arranged below the third bevel gear and is arranged on a threaded rod, a cleaning device is arranged on the threaded rod in a rotating manner, when the interior of the steady flow tank main body needs to be cleaned, the threaded rod can be driven to rotate through transmission, so that an annular frame can be driven to move, the inner wall of the steady flow tank main body is cleaned by a brush bar above the annular frame, meanwhile, the water flow is adopted as a power source, and the device is more energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the technical field of non-negative pressure water supply devices, in particular to a non-negative pressure water supply device.
Background
The non-negative pressure water supply equipment can be directly connected with a water supply network to ensure that the water supply network does not generate negative pressure, the water of the closed water tank is pressurized at peak time to compensate the deficiency of the water supply quantity of the water supply network, and the equipment meeting the water requirement of users mainly comprises the closed water tank, a main pump unit, a variable frequency control cabinet, a pressurizing device, a water diversion device, a steady flow tank, a non-negative pressure flow controller, a pressure maintaining device, a pressure sensor and the like.
However, the current stabilizing tank in the current non-negative pressure water supply equipment is not internally provided with a cleaning device in the use and working processes, so that impurities and the like are adsorbed on the inner wall of the tank body after long-time use, and the water quality is affected.
Therefore, the invention provides a non-negative pressure water supply device for solving the problems.
Disclosure of Invention
The present invention is directed to a non-negative pressure water supply device, which solves the above-mentioned 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 no negative pressure water supply installation, including stationary flow jar main part, the inlet tube is installed on one end upper portion of stationary flow jar main part, install the outlet pipe below the other end of stationary flow jar main part, the inside of inlet tube is equipped with the flabellum, the flabellum is provided with the multiunit, even equidistance is installed in the axis of rotation, the axis of rotation rotates and installs on the inlet tube, first bevel gear is installed to the tip of axis of rotation, be equipped with the second bevel gear below first bevel gear, second bevel gear installs on transfer line one, be equipped with transfer line second below transfer line second and transfer line one turn-round and install at the installation piece, the end at the stationary flow jar main part is installed to the installation piece, the third bevel gear is installed to the lower extreme of transfer line second, be equipped with fourth bevel gear below the third bevel gear, fourth bevel gear is installed at the threaded rod, the centre at the stationary flow jar main part is rotated to the threaded rod, install cleaning device on the threaded rod.
Preferably, the fan blade is provided with a baffle above, the baffle is semicircular, the baffle is arranged on a rotating shaft rod, a supporting block is arranged below the baffle, the supporting block is symmetrically arranged on the inner wall of the water inlet pipe, the rotating shaft rod is rotatably arranged on the water inlet pipe, a handle plate is arranged on the rotating shaft rod, and a positioning component is arranged above the handle plate.
Preferably, the locating component comprises locating pin, spring two, spacing ring and a locating cylinder, the locating pin is pegged graft on the handle board, and the tip of locating pin is pegged graft in a locating cylinder, and a locating cylinder symmetry is installed on the lateral wall of inlet tube, has cup jointed spring two on the locating pin, and spring two's one end is equipped with the spacing ring, and the spacing ring is installed on the locating pin.
Preferably, the cleaning device comprises a threaded ring, a supporting rod, an annular frame, a mounting annular groove, a brush strip and a fastening bolt, wherein the threaded ring is installed on the threaded rod in a threaded mode, the supporting rod is installed on the side wall of the threaded ring, the annular frame is installed at the end portion of the supporting rod, the mounting annular groove is formed in the annular frame, the brush strip is installed in the mounting annular groove, bristles are installed on the brush strip, a threaded hole is formed in the end portion of the mounting annular groove of the annular frame, and the fastening bolt is installed in the threaded hole in a threaded mode.
Preferably, the bottom surface of the first transmission rod is provided with a hexagonal prism groove, the upper end of the second transmission rod is provided with a grafting groove, a hexagonal prism is inserted into the grafting groove, a first spring is arranged below the hexagonal prism, the first spring is arranged in the grafting groove, the side wall of the hexagonal prism is symmetrically provided with a limiting strip, the limiting strip is spliced in a rectangular groove formed in the second transmission rod, the upper end of the second transmission rod is spliced with a bolt, and the end part of the bolt penetrates through the second transmission rod and is spliced on the hexagonal prism.
Preferably, the water inlet pipe and the water outlet pipe are provided with the butt joint disc, the butt joint disc is provided with the threaded columns, the threaded columns are provided with a plurality of groups, the circular uniform equidistant array is formed, the butt joint disc is provided with the arc-shaped grooves, and the arc-shaped grooves are provided with a plurality of groups.
Preferably, a protective frame is arranged in the middle of the upper end of the steady flow tank body, and an observation plate is arranged in the protective frame and is made of a transparent glass plate.
Compared with the prior art, the invention has the beneficial effects that:
1. through setting up cleaning device for when the inside needs to be cleared up of stationary flow jar main part, just can pass through the transmission, make the rotation of threaded rod drive the screwed ring and rotate, just so can drive the annular frame and remove, make the brush strip above the annular frame clear up the inner wall of stationary flow jar main part, adopt rivers to be the power supply simultaneously, more energy-concerving and environment-protective;
2. through having set up the baffle, install the baffle at the pivot pole, installed the handle board on the pivot pole, conveniently rotate the pivot pole through the handle board for the pivot pole drives the baffle and rotates, can change rivers like this and strike on the flabellum edge, changes the difference of flabellum and turns to, and then makes the axis of rotation can rotate clockwise, also can anticlockwise rotate, and then through the transmission, realizes that the threaded rod can drive screwed ring or retreat, makes cleaning device can change the direction of movement.
Drawings
FIG. 1 is a first perspective view of the structure of the present invention;
FIG. 2 is a second perspective view of the structure of the present invention;
FIG. 3 is a partial exploded view of the present invention;
FIG. 4 is a perspective view of a portion of the structure of the present invention;
FIG. 5 is a cross-sectional view of a portion of the structure of the present invention;
FIG. 6 is a schematic view of a cleaning apparatus according to the present invention.
In the figure: the steady flow jar body 1, the protection frame 2, the observation board 3, the inlet tube 4, the outlet tube 41, the butt joint disk 5, the arc groove 51, the threaded column 52, the rotation axis 6, the fan blade 7, the first bevel gear 8, the second bevel gear 9, the first transmission rod 10, the installation block 11, the second transmission rod 12, the inserting groove 121, the hexagonal prism 122, the first spring 123, the limit bar 124, the bolt 125, the rectangular groove 126, the third bevel gear 14, the fourth bevel gear 15, the threaded rod 16, the threaded ring 17, the support bar 18, the annular frame 19, the installation annular groove 20, the brush bar 21, the fastening bolt 211, the baffle 22, the rotation axis bar 23, the handle plate 24, the locating pin 25, the second spring 26, the limit ring 27, the locating cylinder 28 and the support block 29.
Description of the embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below. Embodiments of the present invention are intended to be within the scope of the present invention as defined by the appended claims.
Referring to fig. 1 to 6, the present invention provides a technical solution: the utility model provides a no negative pressure water supply installation, including stationary flow jar main part 1, inlet tube 4 is installed to stationary flow jar main part 1's one end upper portion, install outlet pipe 41 below stationary flow jar main part 1's the other end, the inside of inlet tube 4 is equipped with flabellum 7, flabellum 7 is provided with the multiunit, even equidistance is installed on axis of rotation 6, axis of rotation 6 rotates and installs on inlet tube 4, first bevel gear 8 is installed to axis of rotation 6's tip, be equipped with second bevel gear 9 below first bevel gear 8, second bevel gear 9 installs on transfer line one 10, be equipped with transfer line two 12 below transfer line one 10, transfer line two 12 and transfer line one 10 rotate and install at installation piece 11, installation piece 11 is installed at stationary flow jar main part 1's tip, third bevel gear 14 is installed to transfer line two 12's lower extreme, be equipped with fourth bevel gear 15 below third bevel gear 14, fourth bevel gear 15 is installed at threaded rod 16, threaded rod 16 rotates the centre of installing in stationary flow jar main part 1, install cleaning device on threaded rod 16.
The upper surface of flabellum 7 is equipped with baffle 22, baffle 22 is semi-circular, baffle 22 installs on pivot pole 23, be equipped with supporting shoe 29 below baffle 22, supporting shoe 29 symmetry installs on the inner wall of inlet tube 4, supporting shoe 29 can carry out spacing and support to baffle 22, pivot pole 23 rotates and installs on inlet tube 4, install handle board 24 on the pivot pole 23, be equipped with locating component above the handle board 24, conveniently rotate pivot pole 23 through handle board 24 for pivot pole 23 drives baffle 22 and rotates, can change rivers impact like this on flabellum 7 edge, change the different of flabellum 7 and turn to, and then make axis of rotation 6 can clockwise rotation, also can anticlockwise rotation, and then through the transmission, realize that threaded rod 16 can drive screwed ring 17 or retreat.
The locating component comprises locating pin 25, second spring 26, spacing ring 27 and positioning tube 28, and locating pin 25 is pegged graft on handle board 24, and the tip of locating pin 25 is pegged graft in positioning tube 28, realizes the fixed of handle board 24, and then realizes the fixed of baffle 22 for the rotation axis 6 and flabellum 7 turn to certainly, and positioning tube 28 symmetry installs on inlet tube 4's lateral wall, has cup jointed second spring 26 on the locating pin 25, and second spring 26's one end is equipped with spacing ring 27, and spacing ring 27 installs on locating pin 25.
The cleaning device comprises a threaded ring 17, a supporting rod 18, an annular frame 19, a mounting annular groove 20, a brush strip 21 and a fastening bolt 211, wherein the threaded ring 17 is installed on a threaded rod 16 in a threaded mode, the supporting rod 18 is installed on the side wall of the threaded ring 17, the annular frame 19 is installed at the end portion of the supporting rod 18, the mounting annular groove 20 is formed in the annular frame 19, the brush strip 21 is installed in the mounting annular groove 20, bristles are installed on the brush strip 21, a threaded hole is formed in the end portion of the mounting annular groove 20 of the annular frame 19, the fastening bolt 211 is installed in the threaded hole in a threaded mode, and after the brush strip 21 is installed in the mounting annular groove 20 in a plugging mode, the brush strip 21 can be fixed through the fastening bolt 211.
The bottom surface of transfer line 10 has seted up six prismatic grooves, grafting groove 121 has been seted up to the upper end of transfer line 12, peg graft in grafting groove 121 has hexagonal prism 122, be equipped with spring one 123 below hexagonal prism 122, spring one 123 is arranged in grafting groove 121, spacing 124 is installed to the lateral wall symmetry of hexagonal prism 122, spacing 124 peg graft in rectangular channel 126 that transfer line 12 was seted up, peg graft in the upper end of transfer line 12 has bolt 125, the tip of bolt 125 passes transfer line 12 and peg graft on hexagonal prism 122, in the use, just so when need clear up the inside of stationary flow jar main part 1, just can pull out bolt 125, make spring one 123 pop up hexagonal prism 122, peg graft in hexagonal prismatic groove, make transfer line 10 and transfer line 12 linkage, and then through the transmission, drive cleaning device rotates.
The butt joint disc 5 is installed on the water inlet pipe 4 and the water outlet pipe 41, the threaded columns 52 are installed on the butt joint disc 5, the threaded columns 52 are provided with a plurality of groups and are in circular uniform equidistant arrays, the arc grooves 51 are formed in the butt joint disc 5, the arc grooves 51 are provided with a plurality of groups, and the butt joint disc is convenient to clamp with a butt joint sealing strip through the arc grooves 51, so that the tightness of connection is improved.
The protection frame 2 is installed in the middle of the upper end of stationary flow jar main part 1, installs observation board 3 in the protection frame 2, and observation board 3 is transparent material glass board, conveniently observes the inside condition of stationary flow jar main part 1 through observation board 3 like this.
Working principle: in the use, rivers get into stationary flow jar main part 1 from inlet tube 4, come out in the outlet pipe 41, rivers get into stationary flow jar main part 1's in-process from inlet tube 4, can drive axis of rotation 6 through flabellum 7 and rotate, axis of rotation 6 can rotate together through first bevel gear 8 and second bevel gear 9, after stationary flow jar main part 1 uses certain time, when needing to clear up, at first pull out bolt 125, hexagonal prism 122 is ejecting under the effect of spring two 26, peg graft in the hexagonal prism inslot of transfer line one 10 bottom surfaces, transfer line one 10 will rotate with transfer line two 12 like this, transfer line two 12 can drive threaded rod 16 through third bevel gear 14 and fourth bevel gear 15 and rotate, the rotation of threaded rod 16 will drive the screwed ring 17 and rotate, just so can drive annular frame 19 and remove, make the brush strip 21 above the annular frame 19 clear up the inner wall of stationary flow jar main part 1, simultaneously through the observation board 3, conveniently observe the inside condition of stationary flow jar main part 1, also conveniently adjust the direction of movement of annular frame 19.
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 (4)
1. The utility model provides a no negative pressure water supply installation, includes stationary flow jar main part (1), its characterized in that: a water inlet pipe (4) is arranged at the upper part of one end of the steady flow tank main body (1), a water outlet pipe (41) is arranged below the other end of the steady flow tank main body (1), a plurality of groups of fan blades (7) are arranged in the water inlet pipe (4), the fan blades (7) are uniformly and equidistantly arranged on a rotating shaft (6), the rotating shaft (6) is rotatably arranged on the water inlet pipe (4), a first bevel gear (8) is arranged at the end part of the rotating shaft (6), a second bevel gear (9) is arranged below the first bevel gear (8), the second bevel gear (9) is arranged on a transmission rod I (10), a transmission rod II (12) and the transmission rod I (10) are rotatably arranged below the transmission rod I (10), the installation block (11) is arranged at the end part of the steady flow tank main body (1), a third bevel gear (14) is arranged at the lower end of the transmission rod II (12), a fourth bevel gear (15) is arranged below the third bevel gear (14), the fourth bevel gear (15) is arranged on a threaded rod (16), the transmission rod II (16) is rotatably arranged below the transmission rod I (10), and a steady flow cleaning device is arranged on the threaded rod (16); the fan blade (7) is provided with a baffle (22) on the upper surface, the baffle (22) is semicircular, the baffle (22) is arranged on a rotating shaft rod (23), a supporting block (29) is arranged below the baffle (22), the supporting block (29) is symmetrically arranged on the inner wall of the water inlet pipe (4), the rotating shaft rod (23) is rotatably arranged on the water inlet pipe (4), the rotating shaft rod (23) is provided with a handle plate (24), and a positioning assembly is arranged on the handle plate (24); the positioning assembly consists of a positioning pin (25), a second spring (26), a limiting ring (27) and a positioning cylinder (28), wherein the positioning pin (25) is inserted into the handle plate (24), the end part of the positioning pin (25) is inserted into the positioning cylinder (28), the positioning cylinder (28) is symmetrically arranged on the side wall of the water inlet pipe (4), the second spring (26) is sleeved on the positioning pin (25), one end of the second spring (26) is provided with the limiting ring (27), and the limiting ring (27) is arranged on the positioning pin (25);
six prismatic grooves are formed in the bottom surface of the transmission rod I (10), a plug groove (121) is formed in the upper end of the transmission rod II (12), a hexagonal prism (122) is plugged in the plug groove (121), a first spring (123) is arranged below the hexagonal prism (122), the first spring (123) is arranged in the plug groove (121), limit strips (124) are symmetrically arranged on the side wall of the hexagonal prism (122), the limit strips (124) are plugged in rectangular grooves (126) formed in the transmission rod II (12), a plug pin (125) is plugged in the upper end of the transmission rod II (12), and the end portion of the plug pin (125) penetrates through the transmission rod II (12) to be plugged in the hexagonal prism (122).
2. A non-negative pressure water supply apparatus as claimed in claim 1, wherein: the cleaning device comprises a threaded ring (17), a supporting rod (18), an annular frame (19), a mounting annular groove (20), brush strips (21) and fastening bolts (211), wherein the threaded ring (17) is installed on a threaded rod (16) in a threaded mode, the supporting rod (18) is installed on the side wall of the threaded ring (17), the annular frame (19) is installed at the end portion of the supporting rod (18), the mounting annular groove (20) is formed in the annular frame (19), the brush strips (21) are installed in the mounting annular groove (20), bristles are installed on the brush strips (21), threaded holes are formed in the end portion of the mounting annular groove (20) of the annular frame (19), and the fastening bolts (211) are installed in the threaded holes in a threaded mode.
3. A non-negative pressure water supply apparatus as claimed in claim 1, wherein: the utility model discloses a water inlet pipe, including inlet pipe (4), outlet pipe (41), butt joint dish (5) are all installed on inlet pipe (4) and outlet pipe (41), install screw thread post (52) on butt joint dish (5), screw thread post (52) are provided with the multiunit, are circular even equidistance array, have seted up arc wall (51) on butt joint dish (5), arc wall (51) are provided with the multiunit.
4. A non-negative pressure water supply apparatus as claimed in claim 1, wherein: the flow stabilizing tank is characterized in that a protective frame (2) is arranged in the middle of the upper end of the flow stabilizing tank body (1), an observation plate (3) is arranged in the protective frame (2), and the observation plate (3) is a transparent glass plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216354.6A CN113914421B (en) | 2021-10-19 | 2021-10-19 | Non-negative pressure water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216354.6A CN113914421B (en) | 2021-10-19 | 2021-10-19 | Non-negative pressure water supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113914421A CN113914421A (en) | 2022-01-11 |
| CN113914421B true CN113914421B (en) | 2024-01-30 |
Family
ID=79241313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111216354.6A Active CN113914421B (en) | 2021-10-19 | 2021-10-19 | Non-negative pressure water supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113914421B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114772893B (en) * | 2022-04-13 | 2023-09-29 | 湖南大自然环保股份有限公司 | Municipal sludge drying treatment device and method |
| CN115324168B (en) * | 2022-09-07 | 2023-08-15 | 宏斯机械（上海）有限公司 | Non-negative pressure pipe network supercharging steady flow water supply equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001038317A (en) * | 1999-07-29 | 2001-02-13 | Takada Seisakusho:Kk | Device for preventing inside of water storage tank from being stained |
| CN209053155U (en) * | 2018-10-26 | 2019-07-02 | 重庆金越水务有限公司 | Non-negative pressure water service system |
| CN210713059U (en) * | 2019-08-26 | 2020-06-09 | 山东舜业压力容器有限公司 | Box type non-negative pressure water supply unit |
| CN212175931U (en) * | 2020-04-29 | 2020-12-18 | 河北寰亚泵业股份有限公司 | Non-negative pressure water supply system |
| CN112392102A (en) * | 2020-10-20 | 2021-02-23 | 彩虹（合肥）液晶玻璃有限公司 | Constant-current constant-pressure water supply control device |
| CN112728688A (en) * | 2020-12-24 | 2021-04-30 | 苏州荐欣建筑装饰工程有限公司 | Intelligent building ventilation equipment |
| CN113062402A (en) * | 2021-04-06 | 2021-07-02 | 廖寒 | Box-pump integrated frequency-conversion pressure-superposed water supply equipment |
| CN113431131A (en) * | 2021-06-23 | 2021-09-24 | 上海邦浦实业集团有限公司 | Multipurpose non-negative pressure water supply system |
-
2021
- 2021-10-19 CN CN202111216354.6A patent/CN113914421B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001038317A (en) * | 1999-07-29 | 2001-02-13 | Takada Seisakusho:Kk | Device for preventing inside of water storage tank from being stained |
| CN209053155U (en) * | 2018-10-26 | 2019-07-02 | 重庆金越水务有限公司 | Non-negative pressure water service system |
| CN210713059U (en) * | 2019-08-26 | 2020-06-09 | 山东舜业压力容器有限公司 | Box type non-negative pressure water supply unit |
| CN212175931U (en) * | 2020-04-29 | 2020-12-18 | 河北寰亚泵业股份有限公司 | Non-negative pressure water supply system |
| CN112392102A (en) * | 2020-10-20 | 2021-02-23 | 彩虹（合肥）液晶玻璃有限公司 | Constant-current constant-pressure water supply control device |
| CN112728688A (en) * | 2020-12-24 | 2021-04-30 | 苏州荐欣建筑装饰工程有限公司 | Intelligent building ventilation equipment |
| CN113062402A (en) * | 2021-04-06 | 2021-07-02 | 廖寒 | Box-pump integrated frequency-conversion pressure-superposed water supply equipment |
| CN113431131A (en) * | 2021-06-23 | 2021-09-24 | 上海邦浦实业集团有限公司 | Multipurpose non-negative pressure water supply system |
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| CN113914421A (en) | 2022-01-11 |
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