Branch pipeline for adjusting flow through centrifugal pump

Abstract

The utility model discloses a branch pipeline utilizing a centrifugal pump to adjust flow, which comprises a main water tank, a water outlet pipe is arranged at the bottom of the main water tank, the side face of the water outlet pipe is connected with a water outlet branch pipe through a centrifugal pump, and a return pipe is connected between the water outlet branch pipe and the upper end of the main water tank. According to the utility model, the combination of the return pipe and the flow velocity sensor is introduced, so that unstable water flow can be automatically guided back to the main water tank at the initial stage of starting of the centrifugal pump, and the damage to the water outlet branch pipe caused by water flow impact is effectively avoided. By means of the design, the aging speed of the pipeline is remarkably reduced, the service life of the pipeline is prolonged, and the maintenance cost and the water cut-off time caused by pipeline damage are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, in particular to a branch pipeline which utilizes a centrifugal pump to adjust flow. Background Art

[0002] In the field of fluid transmission and control, centrifugal pumps have become an indispensable key equipment in many industrial and commercial systems due to their high efficiency, wide range of flow and pressure regulation capabilities. For example, the existing centrifugal pump system, such as the integrated drainage pump station equipment disclosed in the Chinese utility model patent with application number 202323538354.5, controls the aqueous solution to enter the centrifugal pump for drainage treatment through the sub-control switch, thus realizing the extraction and distribution of the aqueous solution.

[0003] With existing technologies, the speed of a centrifugal pump is very unstable when it is just started. The unstable speed will cause pipeline vibration, which can easily accelerate the aging and damage of the pipeline. In addition, in cold environments, pipeline icing is also a major challenge facing the fluid transmission system.

[0004] In view of the above technical background, the utility model aims to provide a branch pipeline that utilizes a centrifugal pump to regulate flow. By introducing a combination of a reflux pipe and a flow rate sensor, as well as the design of an electric heating device, it not only solves the problem of unstable flow when the centrifugal pump is started, but also improves the system's cold resistance and safety, providing a more reliable and efficient solution for the field of fluid transmission and control. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a branch pipeline that uses a centrifugal pump to adjust the flow rate to solve the above problem.

[0006] To achieve the above-mentioned purpose, the utility model discloses a branch pipeline for regulating flow rate by using a centrifugal pump, comprising a main water tank, a water outlet pipe is provided at the bottom of the main water tank, a water outlet branch pipe is connected to the side of the water outlet pipe via a centrifugal pump, a return pipe is connected between the water outlet branch pipe and the upper end of the main water tank, a branch pipe valve and a return pipe valve are respectively installed on the water outlet branch pipe and the return pipe, and a flow rate sensor is installed on the return pipe valve.

[0007] Preferably, an electric heating device is installed outside the centrifugal pump.

[0008] Preferably, the electric heating device comprises a shell fixed to the outside of the centrifugal pump and an electric heating wire fixed to the inner wall of the shell.

[0009] Preferably, the water outlet branch pipe is installed with a water pressure sensor.

[0010] Preferably, a manual valve is installed at the other end of the water outlet branch pipe connected to the centrifugal pump.

[0011] Preferably, the main water tank is connected to a water inlet pipe, and the water inlet pipe is installed with a variable frequency water pump.

[0012] Preferably, a water level sensor is installed in the main water tank.

[0013] Preferably, a controller is fixedly installed in the main water tank.

[0014] Compared with the prior art, the utility model has the following benefits:

[0015] 1. The utility model introduces a combination of a return pipe and a flow rate sensor, which can automatically guide the unstable water flow back to the main water tank at the initial start-up of the centrifugal pump, effectively avoiding damage to the outlet branch pipe caused by water flow impact. This design significantly reduces the aging speed of the pipeline, extends the service life of the pipeline, and reduces the maintenance cost and water outage time caused by pipeline damage.

[0016] 2. Aiming at the problem that water pipes are prone to freezing in cold environments, the utility model is equipped with an electric heating device. The device can be activated when the outlet branch pipe freezes, and the water in the centrifugal pump is heated and pumped into the outlet branch pipe to achieve rapid ice melting. At the same time, combined with the real-time monitoring and adjustment function of the water pressure sensor, the stability of the water pressure during the ice melting process is ensured, and system damage caused by excessive water pressure is prevented. This design not only ensures the normal operation of the water supply system, but also improves the system's cold resistance and safety.

[0017] 3. In order to ensure that there is always enough water supply in the main water tank, the utility model is equipped with a variable frequency water pump and a water level sensor. The water level sensor can monitor the water level in the main water tank in real time, and automatically start the variable frequency water pump to replenish water when the water level drops to the set threshold. This design not only realizes the automatic management of water supply, but also realizes energy-saving and efficient water replenishment operation through the precise control of the variable frequency water pump. In addition, the automatic water replenishment function also ensures the continuity and stability of the water supply system, avoiding the problem of water supply interruption caused by insufficient water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the utility model.

[0021] Figure 3 This is a schematic diagram of the connection structure of the electrical module of the utility model.

[0022] In the figure: 1. Main water tank; 2. Water outlet pipe; 3. Centrifugal pump; 4. Water outlet branch pipe; 5. Return pipe; 6. Branch pipe valve; 7. Return pipe valve; 8. Flow rate sensor; 9. Electric heating device; 91. Shell; 92. Electric heating wire; 10. Water pressure sensor; 11. Manual valve; 12. Water inlet pipe; 13. Frequency conversion water pump; 14. Water level sensor; 15. Controller. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-3 The specific implementation modes of the present utility model are further described in detail. Example

[0024] A branch pipeline for regulating flow by a centrifugal pump comprises a main water tank 1, a water outlet pipe 2 is fixedly provided at the bottom of the main water tank 1, and a water outlet branch pipe 4 is connected to the side of the water outlet pipe 2 via a centrifugal pump 3. Specifically, the water inlet of the centrifugal pump 3 is flange-connected to the water outlet pipe 2, the water outlet of the centrifugal pump 3 is flange-connected to the water outlet branch pipe 4, and the other end of the water outlet branch pipe 4 is connected to a site requiring water supply. When in use, water is first added to the main water tank 1, and then an external power supply of the centrifugal pump 3 is turned on. Through the high-speed rotation of the impeller of the centrifugal pump 3, the water is squeezed to the periphery of the impeller by the action of centrifugal force and discharged from the outlet to the water outlet branch pipe 4, and then transported to the site requiring water supply through the water outlet branch pipe 4.

[0025] It is understandable that the centrifugal pump 3 has a low cost and has the characteristics of large flow and stable pressure. For places with stable demand, the centrifugal pump 3 is commonly used. However, the speed of the centrifugal pump 3 gradually increases when it is just started. The unstable speed means that the speed and direction of the water flow are also constantly changing, which will produce instantaneous water flow impact in the water pipe, accelerating the aging and damage of the pipeline.

[0026] In order to reduce the impact on the system when the centrifugal pump 3 is started, a return pipe 5 is connected between the water outlet branch pipe 4 and the upper end of the main water tank 1. The water outlet branch pipe 4 and the return pipe 5 are respectively installed with a branch pipe valve 6 and a return pipe valve 7. The return pipe valve 7 is installed with a flow rate sensor 8. When the water outlet branch pipe 4 needs water supply, we can first open the return pipe valve 7 and close the branch pipe valve 6. During the start-up and acceleration process of the centrifugal pump 3, the water discharged by it returns to the main water tank 1 through the return pipe 5. During the acceleration process, the flow rate sensor 8 monitors the flow rate in the return pipe 5. When the flow rate tends to be stable, the return pipe valve 7 is closed and the branch pipe valve 6 is opened, so that the water flow can enter the water outlet branch pipe 4 at a relatively stable speed, thereby reducing the impact on the water outlet branch pipe 4.

[0027] A manual valve 11 is installed at the other end of the water outlet branch pipe 4 connected to the centrifugal pump 3, which is used to control the opening and closing of the water outlet branch pipe 4 at the end where water supply is required.

[0028] In order to realize the automated operation of the above process, the main water tank 1 is fixedly installed with a controller 15, the flow rate sensor 8 is connected to the controller 15, the branch pipe valve 6 and the return pipe valve 7 are electric valves. When in use, the external power supply of the centrifugal pump 3 is started and the voltage is set through the controller 15 to realize the speed control of the impeller of the centrifugal pump 3, and the flow rate of the water in the return pipe 5 is monitored by the flow rate sensor 8. When the flow rate is stable, the return pipe valve 7 is closed by the controller 15 while the branch pipe valve 6 is opened to realize stable water supply. Example

[0029] The structure of the second embodiment is roughly the same as that of the first embodiment, except that:

[0030] An electric heating device 9 is installed on the outside of the centrifugal pump 3. As we know, when the temperature reaches below zero, it is a common problem that the water pipes freeze. When the water pipes freeze, not only will the system be unable to supply water normally, but in severe cases, it will also cause the water pipes to burst, causing the system to crash. Through the setting of the electric heating device 9, when the outlet branch pipe 4 freezes, the centrifugal pump 3 is first heated by the electric heating device 9, and then the centrifugal pump 3 is started and the return pipe valve 7 and the branch pipe valve 6 are opened at the same time. In this way, the hot water in the centrifugal pump 3 will be continuously sent to the outlet branch pipe 4, and the ice in the outlet branch pipe 4 will gradually melt, and the excess water will automatically be discharged into the main water tank 1 through the return pipe valve 7, which plays a role of pressure relief to prevent the centrifugal pump 3 from being overloaded due to the blockage of the outlet branch pipe 4. The return pipe valve 7 here actually plays the role of a bypass valve.

[0031] The electric heating device 9 includes a shell 91 fixed to the outside of the centrifugal pump 3 and an electric heating wire 92 fixed to the inner wall of the shell 91 . The electric heating wire 92 is connected to the controller 15 .

[0032] Furthermore, the water outlet branch pipe 4 is installed with a water pressure sensor 10, and the water pressure sensor 10 is connected to the controller 15 for monitoring the water pressure of the water outlet branch pipe 4. As mentioned above, in the process of melting ice cubes, the return pipe valve 7 and the branch pipe valve 6 are opened at the same time, and the return pipe valve 7 acts as a bypass valve. When hot water continuously enters the water outlet branch pipe 4 and causes excessive water pressure, the flow of the return pipe 5 can be appropriately increased through the return pipe valve 7 to reduce the pressure on the water outlet branch pipe 4. Example

[0033] The structure of the third embodiment is substantially the same as that of the first embodiment and the second embodiment, except that:

[0034] The main water tank 1 is connected to a water inlet pipe 12 , and a variable frequency water pump 13 is installed on the water inlet pipe 12 . The variable frequency water pump 13 is connected to a controller 15 .

[0035] A water level sensor 14 is installed in the main water tank 1 , and the water level sensor 14 is connected to the controller 15 . It should be noted that the water level in the main water tank 1 should be higher than the height of the centrifugal pump 3 , so that the shell of the centrifugal pump 3 is always filled with water.

[0036] During the water supply process, the water level sensor 14 is used to monitor the water level in the main water tank 1 . When the water level drops to the setting of the controller 15 , the controller 15 controls the variable frequency water pump 13 to start and automatically replenish the main water tank 1 with water.

[0037] In summary, the working principle of the branch pipeline for adjusting flow rate by using a centrifugal pump in the utility model is as follows:

[0038] When the system needs water supply, the centrifugal pump 3 is first started through the controller 15. Since the speed of the centrifugal pump 3 gradually increases at the initial start-up, in order to avoid instantaneous impact on the water outlet branch pipe 4, the system is designed with a return pipe 5. At the initial start-up of the centrifugal pump 3, the return pipe valve 7 is opened and the branch pipe valve 6 is closed, so that the water discharged by the centrifugal pump 3 flows back to the main water tank 1 through the return pipe 5, forming a closed loop. In this process, the flow rate sensor 8 monitors the water flow rate in the return pipe 5 in real time, and transmits the data to the controller 15. When the controller 15 determines that the flow rate has stabilized, that is, the centrifugal pump 3 reaches a stable working state, it automatically closes the return pipe valve 7 and opens the branch pipe valve 6 at the same time, so that the water flows into the water outlet branch pipe 4 at a stable speed and supplies the target site;

[0039] In cold environments, in order to prevent the water outlet branch pipe 4 from freezing and affecting the water supply, the system is equipped with an electric heating device 9. The device consists of a shell 91 fixed to the outside of the centrifugal pump 3 and a built-in electric heating wire 92, and the heating is controlled by the controller 15. When the water outlet branch pipe 4 freezes, the controller 15 will start the electric heating device 9 to heat the centrifugal pump 3, and open the return pipe valve 7 and the branch pipe valve 6 at the same time. The heated water is pumped out through the centrifugal pump 3 and enters the water outlet branch pipe 4, and the ice cubes are gradually melted by the temperature of the hot water. The excess water flows back to the main water tank 1 through the return pipe 5 to achieve circulating heating and ice melting. During this process, the water pressure sensor 10 monitors the water pressure of the water outlet branch pipe 4 in real time to prevent the water pressure from being too high due to the injection of hot water. If the water pressure exceeds the set threshold, the controller 15 will automatically adjust the opening of the return pipe valve 7 to increase the reflux volume to balance the water pressure;

[0040] In order to ensure that there is always enough water in the main water tank 1, the system is also equipped with a variable frequency water pump 13 and a water level sensor 14. The variable frequency water pump 13 is used to connect to the main water supply pipeline, and the water level sensor 14 monitors the water level in the main water tank 1 in real time and feeds the data back to the controller 15. When the water level drops to the minimum water level set by the controller 15, the controller 15 will automatically start the variable frequency water pump 13 to replenish water into the main water tank 1 through the water inlet pipe 12.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A branch pipeline using a centrifugal pump to adjust the flow, characterized in that: The invention comprises a main water tank (1), wherein a water outlet pipe (2) is provided at the bottom of the main water tank (1), a side of the water outlet pipe (2) is connected to a water outlet branch pipe (4) via a centrifugal pump (3), a return pipe (5) is connected between the water outlet branch pipe (4) and the upper end of the main water tank (1), the water outlet branch pipe (4) and the return pipe (5) are respectively installed with a branch pipe valve (6) and a return pipe valve (7), and the return pipe valve (7) is installed with a flow rate sensor (8).

2. A branch pipeline for regulating flow rate by using a centrifugal pump according to claim 1, characterized in that: An electric heating device (9) is installed outside the centrifugal pump (3).

3. A branch pipeline for regulating flow rate by using a centrifugal pump according to claim 2, characterized in that: The electric heating device (9) comprises a housing (91) fixed to the outside of the centrifugal pump (3) and an electric heating wire (92) fixed to the inner wall of the housing (91).

4. A branch pipeline for regulating flow rate by using a centrifugal pump according to claim 2, characterized in that: The water outlet branch pipe (4) is installed with a water pressure sensor (10).

5. A branch pipeline for regulating flow rate by using a centrifugal pump according to claim 1, characterized in that: A manual valve (11) is installed at the other end of the water outlet branch pipe (4) connected to the centrifugal pump (3).

6. A branch pipeline for regulating flow rate by using a centrifugal pump according to claim 1, characterized in that: The main water tank (1) is connected to a water inlet pipe (12), and a variable frequency water pump (13) is installed on the water inlet pipe (12).

7. A branch pipeline for regulating flow rate by using a centrifugal pump according to claim 6, characterized in that: A water level sensor (14) is installed in the main water tank (1).

8. A branch pipeline for regulating flow rate by using a centrifugal pump according to any one of claims 1 to 7, characterized in that: The main water tank (1) is fixedly mounted with a controller (15).

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