CN116290220B - Non-negative pressure water supply equipment with vibration reduction function - Google Patents
Non-negative pressure water supply equipment with vibration reduction function Download PDFInfo
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- CN116290220B CN116290220B CN202310378934.8A CN202310378934A CN116290220B CN 116290220 B CN116290220 B CN 116290220B CN 202310378934 A CN202310378934 A CN 202310378934A CN 116290220 B CN116290220 B CN 116290220B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 233
- 230000009467 reduction Effects 0.000 title claims abstract description 16
- 239000006096 absorbing agent Substances 0.000 claims abstract description 26
- 230000035939 shock Effects 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000007423 decrease Effects 0.000 claims description 16
- 239000012530 fluid Substances 0.000 description 103
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 230000006872 improvement Effects 0.000 description 9
- 238000010276 construction Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- 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
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B5/00—Use of pumping plants or installations; Layouts thereof
-
- 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
-
- 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
- E03B7/072—Arrangement of flowmeters
-
- 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
-
- 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
- E03B7/077—Arrangement of backflow preventing devices
-
- 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
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pipe Accessories (AREA)
Abstract
The invention provides non-negative pressure water supply equipment with a vibration reduction function, which comprises a water supply pipe, a steady flow tank, a water pump water inlet main pipe, a frequency conversion unit, a water pump water outlet main pipe and a water supply pipe which are connected in sequence; a shock absorber is arranged between the water pump water outlet main pipe and the water supply pipe; the shock absorber comprises a first shunt tube body and a first buffer tube body which are connected with each other, the first shunt tube body is connected with a water pump water outlet main pipe, and the first buffer tube body is connected with a water supply pipe; the inner diameters of the first shunt tube body and the first buffer tube body are equal and are larger than the inner diameter of the water supply tube; the first shunt tube body is internally provided with a first shunt plate, the inner cavity of the first shunt tube body is divided into two channels by the first shunt plate, and the cross sectional area of the two channels is gradually reduced from one end connected with the water pump water outlet main pipe to one end connected with the first buffer tube body. The non-negative pressure water supply equipment with the vibration reduction function reduces vibration and noise of a system and ensures stable operation of secondary water supply equipment.
Description
Technical Field
The invention belongs to the technical field of municipal water supply, and particularly relates to negative pressure-free water supply equipment with a vibration reduction function.
Background
The secondary pressurized water supply equipment is increasingly applied to high-rise water supply, and two ends of the non-negative pressure water supply equipment are respectively connected with a municipal pipe network and a user pipe network. When the water pump unit (comprising 1 or more water pumps) is started, the flow of the water supply equipment is suddenly increased, and the water supply pipe network and the user pipe network are impacted, so that the water supply pipe network and the user pipe network generate vibration and noise phenomena. When the water supply equipment suddenly stops pumping, the flow rate of water changes remarkably, the pipe network pressure changes sharply, the inlet and outlet of the water supply equipment repeatedly generate pressure oscillation, water hammer occurs, the pressure in the pipeline increases sharply, and the equipment and the pipeline can be damaged seriously.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the non-negative pressure water supply equipment with the vibration reduction function reduces vibration and noise of a system and ensures stable operation of secondary water supply equipment.
In order to solve the technical problems, the embodiment of the invention provides non-negative pressure water supply equipment with a vibration reduction function, which comprises a water supply pipe, a steady flow tank, a water pump water inlet main pipe, a frequency conversion unit, a water pump water outlet main pipe and a water supply pipe which are connected in sequence; a shock absorber is arranged between the water pump water outlet main pipe and the water supply pipe; the shock absorber comprises a first shunt tube body and a first buffer tube body which are connected with each other, the first shunt tube body is connected with a water pump water outlet main pipe, and the first buffer tube body is connected with a water supply pipe; the inner diameters of the first shunt tube body and the first buffer tube body are equal and are larger than the inner diameter of the water supply tube; the first shunt tube body is internally provided with a first shunt plate, the inner cavity of the first shunt tube body is divided into two channels by the first shunt plate, and the cross sectional area of the two channels is gradually reduced from one end connected with the water pump water outlet main pipe to one end connected with the first buffer tube body.
As a further improvement of the embodiment of the invention, the first flow dividing plate is provided with a first flow dividing surface and a second flow dividing surface, and the included angle between the first flow dividing surface and the interface is alpha 1 The included angle between the second flow dividing surface and the interface is alpha 2 And alpha is 1 ＞0°，α 2 ＞0°。
As a further improvement of the embodiment of the invention, alpha 1 ＝α 2 ，3°≤α 1 ≤10°，3°≤α 2 ≤10°。
As a further improvement of the embodiment of the present invention, the first diverter plate is made of a filter screen.
As a further improvement of the embodiment of the present invention, the shock absorber further includes a second shunt tube connected between the first buffer tube body and the water supply tube; the second flow dividing plate is arranged in the second flow dividing pipe body and divides the inner cavity of the second flow dividing pipe body into two channels, and the cross sectional areas of the two channels gradually decrease from one end connected with the first buffer pipe body to one end connected with the water supply pipe.
As a further improvement of the embodiment of the invention, the second flow dividing plate is provided with a third flow dividing surface and a fourth flow dividing surface, and the included angle between the interface of the third flow dividing surface and the second flow dividing plate is beta 1 The included angle between the fourth flow dividing surface and the interface of the second flow dividing plate is beta 2 And beta is 1 ＞0°，β 2 ＞0°。
As a further improvement of the embodiment of the invention, the included angle between the interface of the first flow dividing plate and the interface of the second flow dividing plate is gamma, and gamma is more than 0 degrees and less than or equal to 90 degrees.
As a further improvement of the embodiment of the invention, the interface of the first flow dividing plate is perpendicular to the interface of the second flow dividing plate.
As a further improvement of the embodiment of the present invention, the damper further includes a second buffer tube body connected between the second shunt tube body and the water supply tube.
As a further improvement of the embodiment of the present invention, the inner diameter of the second buffer tube body gradually decreases from the end connected to the second shunt tube body to the end connected to the water supply tube.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: according to the non-negative pressure water supply equipment with the vibration reduction function, the vibration absorber is arranged between the water outlet main pipe of the water pump and the water supply pipe, when the variable-frequency water pump is started, the high-pressure fluid is enabled to generate the flow dividing and remixing processes in the vibration absorber, so that the pressure of a user pipe network is improved, the impact phenomenon is effectively reduced, and the vibration and noise are reduced; when the variable-frequency water pump suddenly stops running in the running process, the backflow fluid generates mixing and subdividing flow processes in the shock absorber, and the speed is slowed down for a plurality of times, so that the impact of water hammer is slowed down, the vibration and noise phenomena of a water supply pipe network are reduced, the long-term reliable use of the water pump and the pipeline is protected, and the water supply quality is improved.
Drawings
FIG. 1 is a schematic view of a non-negative pressure water supply apparatus having a vibration damping function according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first construction of a shock absorber according to an embodiment of the present invention;
FIG. 3 is a schematic view of a second construction of a shock absorber according to an embodiment of the present invention;
fig. 4 is a left side view of a first shunt body of a shock absorber in an embodiment of the present invention;
fig. 5 is a longitudinal cross-sectional view of a first shunt body of a shock absorber in an embodiment of the present invention.
The drawings are as follows: the water pump comprises a water inlet pipe 1, a first pressure sensor 2, a vacuum suppressor 3, a steady flow tank 4, a water supply pipe 5, a shock absorber 6, a first diversion pipe body 61, a first diversion plate 611, a first buffer pipe body 62, a second diversion pipe body 63, a second diversion plate 631, a second buffer pipe body 64, a second pressure sensor 7, a water pump water outlet main pipe 8, a second butterfly valve 9, a check valve 10, a variable frequency water pump 11, a first butterfly valve 12 and a water pump water inlet main pipe 13.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
The embodiment of the invention provides non-negative pressure water supply equipment with a vibration reduction function, which is shown in fig. 1 and comprises a water supply pipe 1, a steady flow tank 4, a water pump water inlet main pipe 13, a frequency conversion unit, a water pump water outlet main pipe 8 and a water supply pipe 5 which are connected in sequence. The water inlet of the water supply pipe 1 is connected with a municipal water supply pipe network, and the water outlet of the water supply pipe 5 is connected with a user pipe network. The water inlet pipe 1 is provided with a first pressure sensor 2, and the water outlet main pipe of the water pump is provided with a second pressure sensor 7. The first pressure sensor 2 is arranged for observing the pressure of the water inlet pipe 1, and the second pressure sensor 7 is arranged for observing the pressure of the water outlet manifold of the water pump. The steady flow tank 4 is provided with a vacuum inhibitor 3. The vacuum inhibitor 3 is used for inhibiting negative pressure generated in the steady flow tank 4 and keeping the pressure balance of the municipal water supply pipeline network. The variable frequency unit comprises 2-3 groups of variable frequency water pump units which are arranged in parallel between a water inlet main pipe and a water outlet main pipe of the water pump. A plurality of groups of variable-frequency water pump units are arranged in parallel between the water inlet main pipe and the water outlet main pipe of the water pump, and are independent, so that one group of variable-frequency water pump units or a plurality of groups of variable-frequency water pump units can be selectively operated according to actual demands. The variable-frequency water pump unit comprises a water pipe, and a first butterfly valve 12, a variable-frequency water pump 11, a check valve 10 and a second butterfly valve 9 which are sequentially arranged on the water pipe. A first butterfly valve 12 is located upstream of the variable frequency water pump 11 for controlling the inflow of water to the water pipe. The variable-frequency water pump 11 operates, the second butterfly valve 9 is used for controlling the water outlet flow and pressure, and the check valve 10 is used for preventing the high-pressure water of the water pipe from flowing backwards when the variable-frequency water pump 11 stops working.
The shock absorber 6 is arranged between the water pump water outlet main pipe 8 and the water supply pipe 5, as shown in fig. 2, the shock absorber 6 comprises a first shunt pipe body 61 and a first buffer pipe body 62 which are connected with each other, the first shunt pipe body 61 is connected with the water pump water outlet main pipe 8, and the first buffer pipe body 62 is connected with the water supply pipe 5. The first shunt tube body 61 is provided with a first shunt plate 611, the first shunt plate 611 divides the inner cavity of the first shunt tube body 61 into two channels, and the cross-sectional areas of the two channels gradually decrease from the end connected with the water pump water outlet main pipe 8 to the end connected with the first buffer tube body 62. The first shunt tube body 61 and the first buffer tube body 62 are coaxial and thin-walled cylinders with equal inner diameters, and the inner cavities of the first shunt tube body 61 and the first buffer tube body 62 are communicated. The inner diameter of the first buffer tube body 62 is larger than the inner diameter of the water supply tube 5.
In the above embodiment, the first shunt tube body provided with the first shunt plate has the following functions: firstly, when the variable-frequency water pump is started and normally operates, the fluid flow rates in two channels in the first shunt tube body are gradually increased so as to improve the pressure of a user pipe network; when the variable-frequency water pump suddenly stops running, water in the user pipe network flows back to the variable-frequency unit, and the backflow fluid flowing into the first diversion pipe body gradually increases the cross section area of the backflow direction channel, so that the flow speed of the backflow fluid gradually decreases, and the impact of the backflow water body on equipment is effectively slowed down; and thirdly, when the vibration generated by the two channels propagates to the periphery, the directions of the vibration generated by the two sides of the first flow dividing plate are opposite and offset, so that the vibration in the direction perpendicular to the first flow dividing plate is smaller than the vibration generated by the single channel. The first buffer tube body has the following functions: firstly, when the variable-frequency water pump is started and normally operates, two high-pressure fluids flowing out of the first split-flow pipe body 61 enter the first buffer pipe body 62 for mixing, so that impact of the high-pressure fluids on a pipeline is effectively slowed down, and vibration and noise of a system are effectively reduced; second, since the inner diameter of the first buffer tube body 62 is larger than the inner diameter of the water supply tube 5, the flow rate of the backflow fluid is reduced, thereby effectively slowing down the speed of the fluid and reducing the action of the water hammer to protect the equipment and the pipe network.
According to the non-negative pressure water supply equipment, when water needs to be supplied to a user pipe network, the variable frequency water pump 11 in the variable frequency unit is started, pressure water supply is carried out on the basis of municipal pipe network pressure according to the requirement of a user, and pressure water supply is carried out according to the principle of compensating the pressure of difference. The water discharged from the frequency conversion unit enters a water pump water outlet main pipe, passes through the shock absorber 6 and then enters the water supply pipe 5, and finally enters the user pipe network. After the fluid with certain pressure enters the first shunt tube body 61 of the shock absorber 6, the fluid is divided into two flows by the first shunt plate 611, so that the high-pressure fluid is converted into a parallel flow mode from a serial flow mode, the two flows flow towards the first buffer tube body 62, and the flow velocity of the two flows is gradually increased due to the gradual decrease of the cross sectional areas of the two channels in the first shunt tube body in the flowing process, so that the pressure of a user pipe network is improved; meanwhile, the first dividing plate 611 may counteract vibrations of the two streams respectively generated at both sides of the first dividing plate, thereby reducing vibrations at both sides, such that the vibrations in the first dividing pipe body 61 are lower than those of the single flow path. Two high-pressure fluids flowing out of the first shunt tube body 61 enter the first buffer tube body 62, the parallel flow mode is converted into the series flow mode, the two fluids are mutually fused, vibration is absorbed, impact of the high-pressure fluid on a pipeline is effectively reduced, and vibration and noise of the whole equipment are effectively reduced. When the fluid flowing out of the first buffer tube body 62 enters the water supply pipe 5, the flow velocity is increased because the inner diameter of the water supply pipe 5 is smaller than the inner diameter of the first buffer tube body 62, and the pressure of a user pipe network is further improved. When the frequency conversion unit is stopped suddenly, water in the user pipe network flows back to the frequency conversion unit through the water supply pipe and the shock absorber. The flow rate of the reverse flow fluid is reduced because the inner diameter of the first buffer tube body 62 is larger than the inner diameter of the water supply tube 5, into the first buffer tube body 62 of the damper 6. After the backflow fluid enters the first shunt tube body 61, the flow is converted from a serial flow mode to a parallel flow mode, the backflow fluid flows in the two channels towards the water pump water outlet main pipe direction, and in the flowing process, the flow velocity of the two flows is gradually reduced due to the fact that the cross sectional areas of the two channels in the first shunt tube body are gradually increased, so that impact of the backflow fluid on equipment and pipelines is effectively relieved. Meanwhile, the first dividing plate 611 may counteract vibrations generated by two fluids respectively at both sides of the first dividing plate, thereby reducing the vibrations.
According to the non-negative pressure water supply equipment, the vibration absorber is arranged between the water pump water outlet main pipe and the water supply pipe, when the variable-frequency water pump is started and operated, the high-pressure fluid is enabled to generate the flow dividing and remixing processes in the vibration absorber, the pressure of a user pipe network is improved, the impact phenomenon is effectively relieved, and vibration and noise are reduced; when the variable-frequency water pump suddenly stops running in the running process, the backflow fluid generates mixing and subdividing flow processes in the shock absorber, and the speed is slowed down for a plurality of times, so that the impact of water hammer is slowed down, the vibration and noise phenomena of a water supply pipe network are reduced, the long-term reliable use of the water pump and the pipeline is protected, and the water supply quality is improved.
Wherein, as shown in fig. 4, the first shunt plate 611 is axially disposed along the first shunt tube body 61. The first splitter plate 611 has a first splitter surface 6111 and a second splitter surface 6112, and the interface of the first splitter plate 611 is a plane formed by the intersection line of the axis of the first splitter body and the first splitter surface and the second splitter surface. As shown in fig. 5, the longitudinal section of the first shunt body is a plane including the longitudinal cut of the axis of the first shunt body, and the longitudinal section of the first shunt plate is triangular, and the longitudinal section of the first shunt plate is perpendicular to the interface of the first shunt plate. The included angle between the first flow dividing surface and the interface is alpha 1 The included angle between the second flow dividing surface and the interface is alpha 2 And alpha is 1 ＞0°，α 2 > 0 deg.. In FIG. 5, the left side end is the end of the first split-flow tube connected with the water pump water outlet main pipe, the right side end is the end of the first split-flow tube connected with the first buffer tube, the first split-flow surface and the second split-flow surface incline gradually outwards in the flow direction, i.e. the distance between the first split-flow surface and the second split-flow surface is equal to the distance between the first split-flow tube and the water pump water outlet main pipeGradually increases toward the end of the first shunt tube body connected with the first buffer tube body. The first dividing plate 611 divides the inner cavity of the first dividing pipe body into two channels, and the cross-sectional areas of the two channels gradually decrease from the end of the first dividing pipe body connected with the water pump water outlet main pipe to the end of the first dividing pipe body connected with the first buffer pipe body. Preferably, alpha 1 ＝α 2 ，3°≤α 1 ≤10°，3°≤α 2 Less than or equal to 10 degrees. The first splitter plate 611 divides the inner cavity of the first splitter tube 61 equally into two symmetrically distributed channels, and the flow rate and the pressure of the fluid in the two channels are the same.
Preferably, the first splitter plate 611 is made of a filter screen. The fluid in the two channels separated by the first splitter plate 611 is mutually communicated through the filter screen, and the fluid near the two sides of the splitter plate are mutually fused to balance the pressure of the fluid in the two channels, so that the vibration at the two sides is balanced, the vibration is more gentle and balanced, the impact of the fluid on the rear section is slowed down, and the vibration is reduced.
As a preferred example, as shown in fig. 3, the damper 6 further includes a second shunt tube 63, and the first buffer tube 62 is not directly connected to the water supply pipe 5, but the first buffer tube 62 is connected to one end of the second shunt tube 63, and the other end of the second shunt tube 63 is connected to the water supply pipe 5. The second flow dividing plate 631 is provided in the second flow dividing body 63, the second flow dividing plate 631 divides the inner cavity of the second flow dividing body 63 into two passages, and the cross-sectional areas of the two passages gradually decrease from the end connected to the first buffer tube body 62 to the end connected to the water supply tube 5. The second shunt body 63, the first buffer tube body 62 and the first shunt body 61 are thin-walled cylinders which are coaxial and have equal inner diameters, and the inner cavities of the second shunt body 63, the first buffer tube body 62 and the first shunt body 61 are communicated.
In the above embodiment, the second flow dividing body provided with the second flow dividing plate has the following functions: when the variable-frequency water pump is started and normally operated, after the fluid accelerated by the first shunt tube body enters the two channels in the second shunt tube body, the flow speed is gradually increased further, and the pressure of a user pipe network is further improved; secondly, some of the fluid after the speed increasing of the first shunt tube body enters one channel of the second shunt tube body, and the other part of the fluid enters the other channel of the second shunt tube body, namely, one part of the fluid of each channel of the first shunt tube body 61 enters the first channel of the second shunt tube body, and the other part of the fluid enters the second channel of the second shunt tube body; in the new channel, on the one hand, two new fluids are integrated into each other to absorb vibration, and on the other hand, the vibration perpendicular to the direction of the second flow dividing plate is counteracted, so that the vibration and noise are reduced in two mutually perpendicular directions; thirdly, when the variable-frequency water pump suddenly stops running, water in the user pipe network flows back to the variable-frequency water pump, and the backflow fluid flowing into the second diversion pipe body gradually increases the cross section area of the backflow direction channel, so that the flow speed of the backflow fluid gradually decreases, and the impact of the backflow water body on equipment is effectively slowed down; and fourthly, when the vibration generated by the two channels propagates to the periphery, the directions of the vibration generated by the two sides of the second flow dividing plate are opposite and offset, so that the vibration in the direction perpendicular to the second flow dividing plate is smaller than the vibration generated by the single channel.
Wherein the second split plate 631 is axially disposed along the second split pipe 63. The second flow dividing plate 631 has the same structure as the first flow dividing plate 611. The second split plate 631 has a third split surface 6311 and a fourth split surface 6312, and the interface of the second split plate 631 is a plane formed by the intersection line of the second split pipe axis and the third split surface and the fourth split surface. The longitudinal section of the second flow dividing plate is triangular, and the longitudinal section of the second flow dividing plate is perpendicular to the interface of the second flow dividing plate. The included angle between the third flow dividing surface and the interface of the second flow dividing plate 631 is beta 1 The angle between the fourth split surface and the interface of the second split plate 631 is beta 2 And beta is 1 ＞0°，β 2 > 0 deg.. The second flow dividing plate 631 thus divides the inner cavity of the second flow dividing pipe into two passages, and the cross-sectional areas of the two passages gradually decrease from the end of the second flow dividing pipe connected to the first buffer pipe to the end of the second flow dividing pipe connected to the water supply pipe. Preferably, beta 1 ＝β 2 ，3°≤β 1 ≤10°，3°≤β 2 Less than or equal to 10 degrees. The second flow dividing plate 631 equally divides the inner cavity of the second flow dividing body 63 into two symmetrically distributed passagesThe flow and pressure of the fluid in both channels are the same. The second baffle 631 is also made of a filter screen. The fluid of two channels separated by the second splitter plate 631 is mutually communicated through the filter screen, and the fluid nearby the two sides of the splitter plate are mutually fused to balance the pressure of the fluid in the two channels and absorb vibration, so that the vibration at the two sides is balanced, the vibration is more gentle and balanced, the impact of the fluid on the rear section is slowed down, and the vibration is reduced.
Preferably, the angle between the interface of the first splitter plate 611 and the interface of the second splitter plate 631 is gamma, and 0 deg. < gamma. Ltoreq.90 deg.. It is further preferred that the interface of the first splitter plate 611 is perpendicular to the interface of the second splitter plate 631. Fig. 5 is also a top view of the second shunt body. If the first split pipe body is divided by the first split plate 611 to form the upper and lower two channels, the second split pipe body is divided by the second split plate 631 to form the front and rear two channels. The interface of the first splitter plate 611 perpendicular to the interface of the second splitter plate 631 has the following function: when the variable-frequency water pump is started and normally operates, each fluid after the speed of the first split-flow pipe body is increased, and the fluid enters into two channels of the second split-flow pipe body on average, namely, half of the fluid in each channel of the first split-flow pipe body 61 enters into the first channel of the second split-flow pipe body, and the other half of the fluid enters into the second channel of the second split-flow pipe body, namely, half of the fluid in each channel of the second split-flow pipe body is the fluid in each channel of the first split-flow pipe body. In the new channel, on the one hand, two new fluids are integrated into each other to absorb vibration, and on the other hand, the vibration perpendicular to the direction of the second flow dividing plate is counteracted, so that the vibration and noise are reduced in two mutually perpendicular directions; when the variable-frequency water pump is suddenly stopped, water in the user pipe network flows back, and vibration generated by each channel of the second flow dividing pipe 63 propagates to the periphery, the vibration directions generated by two sides of the second flow dividing plate are opposite and offset each other, so that the vibration in the direction perpendicular to the second flow dividing plate is smaller than that generated by a single pipeline; when the backflow fluid enters the first shunt tube body 61, in the new channel, on the one hand, two new fluids are merged with each other to absorb the vibration, and on the other hand, the vibrations perpendicular to the first shunt plate direction cancel each other out, so that both mutually perpendicular directions reduce the vibration and noise.
The second shunt tube 63 is arranged between the first buffer tube and the water supply pipe, and in the starting and normal operation process of the variable-frequency water pump, the fluid flowing out of the two channels of the first shunt tube 61 is temporarily mixed in the first buffer tube 62, so that vibration is further reduced, and the mixed fluid enters the second shunt tube to be distributed again, so that conditions are created for further diversion acceleration and noise and vibration reduction. When the water pump stops running, the backflow fluid flowing out of the two channels of the second shunt tube body 63 is temporarily mixed and absorbed in the first buffer tube body 62, vibration is further reduced, and the backflow fluid enters the first shunt tube body after being mixed to reduce the fluid speed again, so that the generation of water hammer phenomenon is effectively reduced, and vibration and noise are reduced.
As a preferred example, as shown in fig. 3, the damper 6 further includes a second buffer tube body 64, the second shunt tube body 63 is not directly connected to the water supply pipe 5, but the second shunt tube body 63 is connected to one end of the second buffer tube body 64, and the other end of the second buffer tube body 64 is connected to the water supply pipe 5. Preferably, the inner diameter of the second buffer tube body 64 gradually decreases from the end connected to the second shunt tube body 63 to the end connected to the water supply tube 5. The second buffer tube 64 is a hollow thin-walled cone, the inner diameter of the large end of the second buffer tube 64 is equal to the inner diameter of the second shunt tube 63, and the inner diameter of the small end of the second buffer tube is equal to the inner diameter of the water supply tube. The second buffer tube 64 functions as follows: when the variable-frequency water pump is started and normally operated, two high-pressure fluids flowing out of the second shunt pipe body 63 flow into the second buffer pipe body 64, the fluids are converted from a parallel connection form to a serial connection form for mixing, are mutually fused and absorbed, and further reduce the impact of the high-pressure fluids on the system; secondly, when the variable frequency water pump suddenly stops running, the fluid flow velocity gradually decreases due to the gradual increase of the cross-sectional area from the end connected with the water supply pipe 5 to the end connected with the second shunt pipe 63, so that the water hammer phenomenon is effectively slowed down, and the pipe network and the equipment are protected.
The working process of the non-negative pressure water supply device of the above embodiment is as follows:
when water is required to be supplied to a user pipe network, the variable-frequency water pump 11 in the variable-frequency unit is started, pressure water supply is overlapped according to the requirements of the user on the basis of the pressure of the municipal pipe network, and pressurized water supply is performed according to the principle of supplementing the difference. The water discharged from the frequency conversion unit enters a water pump water outlet main pipe, passes through the shock absorber 6 and then enters the water supply pipe 5, and finally enters the user pipe network.
After the fluid with certain pressure enters the first shunt tube body 61 of the shock absorber 6, the fluid is divided into two flows by the first shunt plate 611, so that the high-pressure fluid is converted into a parallel flow mode from a serial flow mode, the two flows flow towards the first buffer tube body 62, and the flow velocity of the two flows is gradually increased due to the gradual decrease of the cross sectional areas of the two channels in the first shunt tube body in the flowing process, so that the pressure of a user pipe network is improved. Meanwhile, when the vibration generated from each channel propagates to the periphery, the directions of the vibration generated from both sides of the first splitter plate 611 are opposite, and cancel each other, thereby reducing the amplitude of the vibration in the direction perpendicular to the first splitter plate. The fluid of two passageways is interconnected through first flow distribution plate 611 filter screen, and the fluid nearby of first flow distribution plate both sides fuses each other to the pressure of balanced fluid in the two passageways, thereby the vibration on balanced both sides makes the vibration more mild equilibrium, slows down the impact of fluid to the back end simultaneously, reduces the vibration.
Two high-pressure fluids flowing out of the first shunt tube body 61 enter the first buffer tube body 62 to be mutually fused and absorbed, the parallel flow mode is converted into the series flow mode to be mutually fused, vibration is absorbed, and conditions are created for carrying out second shunt and reducing vibration and noise, so that impact of the high-pressure fluid on a pipeline is effectively slowed down, and vibration and noise of the whole equipment are effectively reduced.
Half of the fluid from each channel of the first shunt body 61 enters the first channel of the second shunt body and the other half enters the second channel of the second shunt body (or the two channels of the second shunt body after being briefly mixed by the first buffer body 62). And the fluid in the parallel flow mode is carried out in a new channel, the fluid flow rate in each channel is gradually increased, and the pressure of a user pipe network is further improved. On the one hand, two new fluids are fused into each other to absorb vibration, on the other hand, vibration perpendicular to the direction of the second flow dividing plate 631 counteracts each other, meanwhile, the fluids of the two channels are communicated with each other through the filter screen of the second flow dividing plate 631, and the fluids near the two sides of the second flow dividing plate are fused into each other to balance the pressure of the fluids in the two channels, so that the vibration at the two sides is balanced, the vibration is more gentle and balanced, the impact of the fluid on the rear section is relieved, and the vibration is reduced. The split flow passing through the first and second split flow bodies 61 and 63 in different directions reduces vibration and noise in both directions perpendicular to each other.
When the two high-pressure fluids flowing out of the second split pipe 63 flow to the second buffer pipe 64, the fluids are converted from a parallel flow mode to a serial flow mode, and are mixed, fused and absorbed, so that the impact of the high-pressure fluid on the system is further reduced. The pressure of the user network is further increased and the water supply head of the system is increased due to the gradual decrease in the inner diameter of the second buffer tube body 64.
The high-pressure fluid sequentially passes through the parallel vibration reduction of the first shunt tube body 61, the serial vibration reduction of the first buffer tube body 62, the parallel vibration reduction of the second shunt tube body 63 in the vertical direction and the serial vibration reduction of the second buffer tube body 64, so that the vibration and noise of a three-dimensional space are effectively reduced, and the vibration and noise in the starting and running processes of the water pump are effectively reduced.
When the frequency conversion unit is stopped suddenly, water in the user pipe network flows back to the frequency conversion unit through the water supply pipe and the shock absorber. The retrograde fluid flows into the second buffer tube 64 and, as a result of the gradual increase in cross-sectional area, the retrograde flow velocity gradually decreases, reducing the velocity, noise, and vibration of the retrograde fluid for the first time.
When the backflow fluid with the first speed reduced flows to the second shunt pipe 63, the fluid is converted from a serial flow mode to a parallel flow mode, and the backflow fluid reversely flows in the two channels, and the flow velocity of the backflow fluid is gradually reduced due to the gradual increase of the cross section area of the channels, so that the impact of the backflow water body on equipment and pipelines is effectively reduced. The vibrations in the direction perpendicular to the second flow dividing plate 631 are offset each other, and simultaneously, the fluid of two channels is mutually communicated through the second flow dividing plate 631 filter screen, and the fluid nearby the both sides of second flow dividing plate is mutually fused to balance the pressure of the fluid in two channels, absorb the vibrations, thereby balance the vibrations on both sides, make the vibrations more mild balanced, slow down the impact of fluid to the back end simultaneously, reduce the vibrations.
The backflow fluid flowing out from the two channels of the second shunt body 63 is temporarily mixed in the first buffer body 62, the fluid is converted from the parallel flow mode to the serial flow mode again, the fluid is mutually fused and absorbed, and vibration and noise are reduced for the third time.
Half of each channel fluid of the second shunt body 63 enters the first channel of the first shunt body and the other half enters the second channel of the first shunt body (or the two channels of the first shunt body after being briefly mixed by the first buffer body 62). In the new channel, on the one hand, the two new fluids merge into each other to absorb vibrations, and on the other hand, vibrations in directions perpendicular to the first flow dividing plate cancel each other out, so that vibrations and noise are reduced in both mutually perpendicular directions. The fluid in the parallel flow mode flows reversely in the new channel again, and the cross section area of the channel is gradually increased, so that the flow velocity of the backflow fluid is gradually reduced, the impact of the backflow water body on equipment is effectively slowed down, meanwhile, the fluid in the two channels is mutually communicated through the first splitter plate 611 filter screen, and the fluid nearby the two sides of the first splitter plate are mutually fused to balance the pressure of the fluid in the two channels, so that the vibration at the two sides is balanced, the vibration is more gentle and balanced, the impact of the fluid on the rear section is slowed down, and the vibration is reduced.
The speed of the backflow fluid passing through the second buffer tube body 64 is reduced, the second shunt tube bodies 63 are reduced in parallel, the serial connection of the first buffer tube bodies 62 is reduced, the parallel connection of the first shunt tube bodies 61 is reduced, the vibration and noise of the three-dimensional space are effectively reduced, the water hammer impact phenomenon of the backflow fluid on the pump and the pipeline system is effectively reduced, and therefore the safe operation of equipment and the system is guaranteed.
When vibration and noise in other directions need to be reduced in the field, different gamma may be selected to achieve the desired vibration reduction function.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the specific embodiments described above, and that the above specific embodiments and descriptions are provided for further illustration of the principles of the present invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (10)
1. The non-negative pressure water supply equipment with the vibration reduction function is characterized by comprising a water supply pipe (1), a steady flow tank (4), a water pump water inlet main pipe (13), a frequency conversion unit, a water pump water outlet main pipe (8) and a water supply pipe (5) which are connected in sequence; a shock absorber (6) is arranged between the water pump water outlet main pipe (8) and the water supply pipe (5); the shock absorber (6) comprises a first shunt tube body (61) and a first buffer tube body (62) which are connected with each other, the first shunt tube body (61) is connected with a water pump water outlet main pipe (8), and the first buffer tube body (62) is connected with a water supply pipe (5); the inner diameters of the first shunt tube body (61) and the first buffer tube body (62) are equal and are larger than the inner diameter of the water supply pipe (5); be equipped with first flow distribution plate (611) in first shunt tubes body (61), first flow distribution plate (611) separates into two passageway with the inner chamber of first shunt tubes body (61), and the cross-sectional area of two passageway reduces gradually from the one end that is connected with water pump play water header pipe (8) to the one end that is connected with first buffer tube body (62).
2. The non-negative pressure water supply device according to claim 1, characterized in that the first flow dividing plate (611) has a first flow dividing surface (6111) and a second flow dividing surface (6112), the angle between the first flow dividing surface and the interface being α 1 The included angle between the second flow dividing surface and the interface is alpha 2 And alpha is 1 ＞0°，α 2 ＞0°。
3. The non-negative pressure water supply apparatus according to claim 2, wherein α 1 ＝α 2 ，3°≤α 1 ≤10°，3°≤α 2 ≤10°。
4. The non-negative pressure water supply apparatus according to claim 2, wherein the first diverter plate (611) is made of a filter screen.
5. The non-negative pressure water supply apparatus according to claim 1, wherein the damper (6) further comprises a second shunt body (63), the second shunt body (63) being connected between the first buffer tube body (62) and the water supply tube (5); a second flow dividing plate (631) is arranged in the second flow dividing pipe (63), the second flow dividing plate (631) divides the inner cavity of the second flow dividing pipe (63) into two channels, and the cross sectional areas of the two channels gradually decrease from one end connected with the first buffer pipe body (62) to one end connected with the water supply pipe (5).
6. The non-negative pressure water supply apparatus according to claim 5, wherein the second diverting plate (631) has a third diverting surface (6311) and a fourth diverting surface (6312), and an angle β is formed between the third diverting surface and an interface of the second diverting plate (631) 1 The included angle between the fourth flow dividing surface and the interface of the second flow dividing plate (631) is beta 2 And beta is 1 ＞0°，β 2 ＞0°。
7. The non-negative pressure water supply apparatus according to claim 6, wherein an angle between an interface of the first diverting plate (611) and an interface of the second diverting plate (631) is γ, and 0 ° < γ is 90 °.
8. The non-negative pressure water supply apparatus according to claim 7, wherein the interface of the first diverting plate (611) is perpendicular to the interface of the second diverting plate (631).
9. The non-negative pressure water supply apparatus according to claim 5, wherein the damper (6) further comprises a second buffer tube body (64), the second buffer tube body (64) being connected between the second shunt tube body (63) and the water supply tube (5).
10. The non-negative pressure water supply apparatus according to claim 9, wherein the inner diameter of the second buffer tube body (64) gradually decreases from the end connected to the second shunt tube body (63) to the end connected to the water supply tube (5).
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| CN202310378934.8A CN116290220B (en) | 2023-04-11 | 2023-04-11 | Non-negative pressure water supply equipment with vibration reduction function |
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| CN202310378934.8A CN116290220B (en) | 2023-04-11 | 2023-04-11 | Non-negative pressure water supply equipment with vibration reduction function |
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| CN116290220B true CN116290220B (en) | 2023-10-24 |
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| CN208503638U (en) * | 2018-07-13 | 2019-02-15 | 山东康爱制药有限公司 | Water-hammer arrester and water hammer cancellation element |
| CN210395578U (en) * | 2019-04-17 | 2020-04-24 | 中煤建工集团有限公司广东分公司 | High-rise drainage pipeline |
| CN212986417U (en) * | 2020-07-07 | 2021-04-16 | 郑州长弘商砼有限公司 | Conveying pipeline capable of reducing water hammer acting force |
| CN215211264U (en) * | 2021-06-03 | 2021-12-17 | 蓝深集团股份有限公司 | Non-negative pressure water supply equipment with water hammer protection function |
| CN115654247A (en) * | 2022-09-22 | 2023-01-31 | 江苏金烨钛业有限公司 | High leakproofness has and inhales buffer who shakes function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2017127703A (en) * | 2016-08-10 | 2019-02-05 | Бейджинг Хуаши Юнайтед Энерджи Технолоджи энд Девелопмент Ко., Лтд. | REDUCING VALVE AND PRESSURE REDUCTION SYSTEM |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208503638U (en) * | 2018-07-13 | 2019-02-15 | 山东康爱制药有限公司 | Water-hammer arrester and water hammer cancellation element |
| CN210395578U (en) * | 2019-04-17 | 2020-04-24 | 中煤建工集团有限公司广东分公司 | High-rise drainage pipeline |
| CN212986417U (en) * | 2020-07-07 | 2021-04-16 | 郑州长弘商砼有限公司 | Conveying pipeline capable of reducing water hammer acting force |
| CN215211264U (en) * | 2021-06-03 | 2021-12-17 | 蓝深集团股份有限公司 | Non-negative pressure water supply equipment with water hammer protection function |
| CN115654247A (en) * | 2022-09-22 | 2023-01-31 | 江苏金烨钛业有限公司 | High leakproofness has and inhales buffer who shakes function |
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