CN210509764U - Isobaric pressure difference augmented flow control system - Google Patents
Isobaric pressure difference augmented flow control system Download PDFInfo
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- CN210509764U CN210509764U CN201920885082.0U CN201920885082U CN210509764U CN 210509764 U CN210509764 U CN 210509764U CN 201920885082 U CN201920885082 U CN 201920885082U CN 210509764 U CN210509764 U CN 210509764U
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Abstract
The utility model discloses an isobaric difference current gain control system, pipe network system divide into operation net and load net, installs venturi type jet pump at the load net front end, and venturi type jet pump's entry linkage operation net's outlet conduit, venturi type jet pump's exit linkage load net's inlet channel, venturi type jet pump's sunction inlet connection load net's return water pipeline. The utility model discloses can solve heating power pipe network hydraulic unbalance, improve heating power pipe network load, reduce heating power pipe network power consumption, reduce heating power pipe network system heat loss, improve heating power pipe network water supply or heating efficiency.
Description
Technical Field
The utility model relates to a water supply and heat supply technique specifically says, relates to an isobaric difference current increase control system.
Background
The Venturi tube is a device for measuring a fluid pressure difference, and is classified into a built-in Venturi tube and a plug-in Venturi tube according to its structure. The method has good effect in the measurement of combustion-supporting air, cold air and gas of hot blast stoves of steel plants (blast furnace gas, coke oven gas and converter gas) and the measurement of primary air and secondary air large-diameter and low-flow-rate pipelines of boilers of thermal power plants. The method solves the problem of accurate measurement of various gas flows of low pressure, large pipe diameter and low flow velocity in the existing industrial enterprises. The fluid measuring device has wide measuring range and is convenient to install. The unique structure design and the data processing method have strict fluid mechanics basis and carry out real flow calibration in a national large-scale key wind tunnel laboratory.
FIG. 1 is a schematic diagram of the operation of a prior art pipe network system; fig. 2 is a schematic diagram showing the distribution of a pipe network system in the prior art.
The pipe network system includes: the operation net of water supply end and the load net of load end, return water pipeline 2 and water supply pipeline 1 are linked together, and water supply pipeline 1 is provided with valve 3. The water return pipeline 2 and the water supply pipeline 1 at the water supply end form a pressure difference delta Pn at the water return end and the water outlet end of the operation net end corresponding to different users.
The existing heat supply system belongs to a secondary pipe network, wherein a heat supply end is a primary pipe network, and a user end is a secondary pipe network. The pipe network system forms heat supply loss at two ends of heat exchange points of a heat exchange station, a unit building, a unit and a heat user, and heat supply is unbalanced due to different loads, so that heat supply efficiency is influenced.
In a word, the existing pipe network system for water supply and heat supply can not realize the hydraulic balance adjustment of the regional network, so that the load is low, the power consumption and the heat consumption are high, and the water supply efficiency and the heat supply efficiency are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem who solves provides an isobaric difference current increase control system, can solve heating power pipe network water conservancy unbalance, improves heating power pipe network load, reduces heating power pipe network power electricity consumption, reduces heating power pipe network system heat loss, improves heating power pipe network water supply or heating efficiency.
The technical scheme is as follows:
a pipe network system is divided into an operation network and a load network, and a Venturi type jet pump is installed at the front end of the load network.
Further, the load net is divided into: the Venturi type jet pump is arranged at the front end of the first-level net, the second-level net, the third-level net, the fourth-level net or the fifth-level net.
Furthermore, the inlet of the Venturi type jet pump is connected with a water outlet pipeline of the operation net, the outlet of the Venturi type jet pump is connected with a water inlet pipeline of the load net, and the suction inlet of the Venturi type jet pump is connected with a water return pipeline of the load net.
Further, the venturi-type jet pump compensates for the pressure difference of the various branches of the operating net by means of a return line.
Further, the venturi-type jet pump includes: inlet, suction chamber, mixing chamber, diffuser; the inlet and the suction inlet are respectively connected to the suction chamber, the mixing chamber and the diffuser are sequentially connected, the front end of the inlet is provided with a nozzle, the nozzle is positioned in the suction chamber, and the nozzle is opposite to the mixing chamber.
The utility model discloses technical effect includes:
the utility model discloses can solve heating power pipe network hydraulic unbalance, improve heating power pipe network load, reduce heating power pipe network power consumption, reduce heating power pipe network system heat loss, improve heating power pipe network water supply or heating efficiency.
Drawings
FIG. 1 is a schematic diagram of the operation of a prior art pipe network system;
FIG. 2 is a schematic distribution diagram of a prior art pipe network system;
FIG. 3 is a schematic diagram of the operation of the pipe network system of the present invention;
FIG. 4 is a schematic distribution diagram of the pipe network system of the present invention;
fig. 5 is a schematic structural view of the venturi jet pump of the present invention.
Detailed Description
The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
As shown in fig. 3, it is a working schematic diagram of the pipe network system of the present invention; as shown in fig. 4, it is a distribution diagram of the pipe network system of the present invention; fig. 5 is a schematic structural view of the venturi jet pump of the present invention.
The pipe network system is divided into an operation network and a load network. The utility model discloses in, at the front end of the load net of pipe network system, install venturi type jet pump. A venturi-type jet pump is a device that connects an operating net and a load net.
The inlet 1 of the Venturi type jet pump is connected with a water outlet pipeline of the operation net, the outlet 2 of the Venturi type jet pump is connected with a water inlet pipeline of the load net, and the suction inlet 3 of the Venturi type jet pump is connected with a water return pipeline of the load net. The inlet 1 and the suction inlet 3 are connected to the suction chamber 4, the mixing chamber 5 and the diffuser 6 are sequentially connected, the nozzle 7 is arranged at the front end of the inlet 1, the nozzle 7 is positioned in the suction chamber 4, and the nozzle 7 is opposite to the mixing chamber 5.
The flow rate of the water flowing from the inlet 1 is F1, the higher the water flow speed, the lower the pressure of the suction chamber 4 (almost vacuum) due to the action of the nozzle 7, the faster the water flow speed, the cold water flow is sucked from the suction port 3 by the suction chamber 4, the flow rate is F2, F1 is F2 due to the design, the hot water flow and the cold water flow are fully mixed in the mixing chamber 5 and enter the diffuser 6, the water flow speed is reduced, the pressure at the outlet 2 is increased, the flow rate at the outlet 2 is F, and F1+ F2.
Due to the nozzle 7, a pressure difference is formed at the inlet 1 for the water supply and return pipes, and the pressure difference at each inlet 1 in the travelling net is equal.
The isobaric pressure difference flow increasing control method comprises the following specific steps:
step 1: the operation network of the pipe network system utilizes the water pump to send the water in the water supply pipeline to each branch pipe network on the operation network, the branch pipe network sends the water into the inlet 1 of the Venturi type jet pump, the outlet 2 of the Venturi type jet pump sends the water into the water inlet pipeline of the load network;
step 2: water flows through the load and then enters the water return pipeline of the running net from the water return pipeline, part of water in the water return pipeline enters the suction inlet 3 of the Venturi type jet pump again, and the flow of the load net is increased by the Venturi type jet pump through the flow of the water return pipeline.
The flow rate of the outlet 2 is equal to the sum of the flow rates of the inlet 1 and the suction inlet 3.
The Venturi type jet pump enables the pressure difference delta Pn of the water outlet end of each branch (operation net) of the water network system to be consistent (or equal), reduces the water flow of the operation net, reduces the water flow speed, further reduces the on-way resistance of the load net, enables the front end pressure of the Venturi type jet pump to be balanced, and solves the problem of hydraulic unbalance of the operation pipe network. The running power of the water pump is reduced because the water flow speed of the running net is reduced, thereby saving electric energy. The flow of the running network is reduced, the temperature difference is increased, and the heat transmitted by the network is ensured to be unchanged. (Q-F1 X.DELTA.T, Q representing heat, F1 representing inlet flow, DELTA.T representing temperature difference)
The Venturi type jet pump increases the flow F of the outlet (running net) and the size of the outlet flow F is the sum of the inlet flow F1 and the inlet flow F2, so that the outlet flow F is doubled compared with the inlet flow F1, and under the condition that the temperature difference is not changed, the heat of a user is increased, the heat supply efficiency is improved, the heat waste is reduced, and the heat is saved.
After the venturi type jet pump is installed on the pipe network system, the pipe network system is divided into multistage loads. In the preferred embodiment of the present invention, the load net is divided into five stages: one-level net, second grade net, tertiary net, level four net, five-level net, the front end at one-level net, second grade net, tertiary net, level four net or five-level net is installed to the venturi jet pump, and the user net divide into the level four load: a first-stage load (heat exchange station), a second-stage load (unit building), a third-stage load (unit) and a fourth-stage load (user).
When the venturi type jet pump is installed on the first-level network, the venturi type jet pump is installed at the front end of the first-level load, namely, the venturi type jet pump is installed on the first-level network, namely, the venturi type jet pump is installed between a heat source and a heat exchange station or in the heat exchange station, so that the heat supply load of a thermal power plant can be improved, the heat supply area is enlarged, and the heat supply balance is realized among all the heat exchange stations.
The Venturi type jet pump is arranged on the secondary net, namely at the position of a hot water outlet of the heat exchange station. The branch lines for installing the Venturi type jet pump form an independent whole without interfering the whole pipe network system, and the load carried by the Venturi type jet pump is large under the condition. A plurality of branch lines are formed in the heat exchange station, the pressure difference delta Pn of the inlet (running network) of each branch pipe network tends to be consistent (or equal), the water flow of the running network is reduced, the water flow speed is reduced, the on-way resistance of the pipe network is further reduced, the pressure of the front end of the Venturi type jet pump is balanced, and the problem of water power unbalance of the running network is solved. Because the water flow speed of the running pipe network is reduced, the running power of the water pump is reduced, and therefore electric energy is saved. The flow of the running network is reduced, the temperature difference is increased, and the heat transmitted by the network is ensured to be unchanged. (Q-f 1X Δ T, Q represents heat, f1 represents inlet flow, Δ T represents temperature difference)
The venturi-type ejector pump causes the outlet (user network) flow F to increase, so that the outlet flow F is the sum of the inlet flow F1 and the inlet flow F2, i.e. the flow output from the heat exchange station increases, which corresponds to an increase in the heating load of the heat exchange station. It can be seen that the outlet flow F is doubled compared with the inlet flow F1, and then under the condition that the temperature difference is not changed, the heat quantity delivered by the heat exchange station is increased, that is, the heat exchange station can provide more heat quantity, so that the heat supply load is increased, the heat supply efficiency is also improved, the heat waste is reduced, and the heat quantity is saved.
The Venturi type jet pump is arranged on the three-level network, namely on a main heat supply pipeline in front of the whole unit building. Each unit building forms an independent whole, and the interference is not interfered or is small during the operation of the system, so that the stable operation of the system is ensured. The pipeline of the external network of the heat exchange station forms a plurality of branch lines, the pressure difference delta Pn of the inlet (running network) of each branch pipeline network tends to be consistent (or equal), the water flow of the running network is reduced, and meanwhile, the water flow speed is reduced, so that the on-way resistance of the pipeline network is further reduced, the pressure at the front end of the Venturi type jet pump is balanced, and the problem of the hydraulic unbalance of the running network is solved. Because the water flow speed of the running pipe network is reduced, the running power of the water pump is reduced, and therefore electric energy is saved. The flow of the running network is reduced, the temperature difference is increased, and the heat transmitted by the network is ensured to be unchanged. (Q-f 1X Δ T, Q represents heat, f1 represents inlet flow, Δ T represents temperature difference)
The venturi jet pump causes an increase in the outlet (user net) flow F, so that the magnitude of the outlet flow F is the sum of the inlet flow F1 and the inlet flow F2, i.e. the flow into the cell floor increases. Therefore, the outlet flow F is doubled compared with the inlet flow F1, so that under the condition that the temperature difference is not changed, the heat entering the unit building is increased by the formula, more heat can be provided for users, the heating efficiency is improved, the heat waste is reduced, and the heat is saved.
The venturi-type jet pump is installed on the quaternary network, namely on the front heating pipeline of each unit. Each unit forms an independent whole, and the interference is not or slightly small during the operation of the system, so that the stable operation of the system is ensured.
Make each unit pipeline form many branches, each branch pipe network entrance (operation net) pressure differential delta Pn tends to unanimity (or equals), reduces operation net water flow, and the velocity of water flow reduces simultaneously, has further reduced pipe network on-the-way resistance for venturi type jet pump front end pressure is balanced, thereby has solved the problem of operation net hydraulic unbalance. Because the water flow speed of the running pipe network is reduced, the running power of the water pump is reduced, and therefore electric energy is saved. The flow of the running network is reduced, the temperature difference is increased, and the heat transmitted by the network is ensured to be unchanged. (Q-f 1X Δ T, Q represents heat, f1 represents inlet flow, Δ T represents temperature difference)
The venturi jet pump causes an increase in the outlet (forming the user net) flow F, so that the magnitude of the outlet flow F is the sum of the inlet flow F1 and the inlet flow F2, i.e. the flow into the cell increases. It can be seen from this that the outlet flow F is doubled compared with the inlet flow F1, and then under the condition that the temperature difference is not changed, as can be seen from the above formula, the heat entering the unit is increased, i.e. more heat can be provided for the user, the heating efficiency is improved, the heat waste is reduced, and the heat is saved.
The venturi jet pump is installed on the five-level network, namely on the front heat supply pipeline of each household user. Each unit forms an independent whole, and the interference is not or slightly small during the operation of the system, so that the stable operation of the system is ensured.
The pressure difference delta Pn of each branch inlet (forming an operation network) tends to be consistent (or equal), the water flow of the operation network is reduced, and meanwhile, the water flow speed is reduced, so that the on-way resistance of the pipe network is further reduced, the pressure at the front end of the Venturi type jet pump is balanced, and the problem of water power unbalance of the operation network is solved. Because the water flow speed of the running pipe network is reduced, the running power of the water pump is reduced, and therefore electric energy is saved. The flow of the running network is reduced, the temperature difference is increased, and the heat transmitted by the network is ensured to be unchanged. (Q-F1 X.DELTA.T, Q representing heat, F1 representing inlet flow, DELTA.T representing temperature difference)
The venturi jet pump causes an increase in the outlet (forming the user net) flow F, so that the outlet flow F is of a magnitude which is the sum of the inlet flow F1 and the inlet flow F2, i.e. the flow into the domestic user increases. Therefore, the outlet flow F is doubled compared with the inlet flow F1, so that under the condition that the temperature difference is not changed, the formula shows that the heat entering the family user is increased, more heat can be provided for the user, the heating efficiency is improved, the heat waste is reduced, and the heat is saved.
The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (3)
1. The isobaric difference flow-increasing control system is characterized in that a pipe network system is divided into an operation network and a load network, and a Venturi type jet pump is installed at the front end of the load network; the inlet of the Venturi type jet pump is connected with a water outlet pipeline of the running net, the outlet of the Venturi type jet pump is connected with a water inlet pipeline of the load net, and the suction inlet of the Venturi type jet pump is connected with a water return pipeline of the load net; the venturi-type jet pump includes: inlet, suction chamber, mixing chamber, diffuser; the inlet and the suction inlet are respectively connected to the suction chamber, the mixing chamber and the diffuser are sequentially connected, the front end of the inlet is provided with a nozzle, the nozzle is positioned in the suction chamber, and the nozzle is opposite to the mixing chamber.
2. The isobaric pressure difference flow-increasing control system according to claim 1, characterized in that the load network is divided into: the Venturi type jet pump is arranged at the front end of the first-level net, the second-level net, the third-level net, the fourth-level net or the fifth-level net.
3. The isobaric pressure-difference flow-increasing control system according to claim 1, characterized in that the venturi jet pump uses a return line to compensate the pressure difference of the various branches of the operating net.
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| CN201920885082.0U CN210509764U (en) | 2019-06-12 | 2019-06-12 | Isobaric pressure difference augmented flow control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013453A (en) * | 2020-09-22 | 2020-12-01 | 天津大学 | Regional heating system integrating pipe network classification and intelligent control and transformation method |
| CN115034133A (en) * | 2022-06-01 | 2022-09-09 | 浙江英集动力科技有限公司 | Jet pump heat supply system implementation method based on information physical fusion |
-
2019
- 2019-06-12 CN CN201920885082.0U patent/CN210509764U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013453A (en) * | 2020-09-22 | 2020-12-01 | 天津大学 | Regional heating system integrating pipe network classification and intelligent control and transformation method |
| CN115034133A (en) * | 2022-06-01 | 2022-09-09 | 浙江英集动力科技有限公司 | Jet pump heat supply system implementation method based on information physical fusion |
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Address after: 9-906, 9th Floor, Jingkong Building, No. 57 Lushan Road, Huangdao District, Qingdao, Shandong Province, 266000 Patentee after: Qingdao Hairui Intelligent Technology Co.,Ltd. Address before: 266000 Shenghai Road North Feiyu Road East, Huangdao District, Qingdao City, Shandong Province Patentee before: Qingdao Hairui Intelligent Engineering Co.,Ltd. |
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