Fluid circulation system with high-low pressure conversion function

Abstract

The utility model discloses a fluid circulation system with a high-low pressure conversion function, which comprises a water supply pipe, a water return pipe and using equipment, one end of the water supply pipe is sequentially connected with a pipeline filter, a pressure reducing valve and a water inlet end of the using equipment, and one end of the water return pipe is sequentially connected with a check valve, a circulating pump and a water outlet end of the using equipment. And the other end of the water supply pipe and the other end of the water return pipe are connected. The utility model solves the problem that the pressure and flow of the fluid in the high-pressure pipeline and the use equipment are incompatible.

Description

Technical Field

[0001] This utility model relates to the field of circulation pipeline technology, specifically to a fluid circulation system with high and low pressure switching function. Background Technology

[0002] In fluid transport systems, it is sometimes necessary to introduce high-pressure fluids into the equipment being used. To ensure the fluid flow rate, the circulating fluid pressure in the system is higher than the operating pressure of the equipment being used, so the equipment cannot use it directly. Moreover, although the return water pressure in the high-pressure circulating pipeline is lower than the supply water pressure, it is still higher than the operating pressure of the equipment being used. The fluid needs to undergo a high-pressure-low-pressure-high-pressure change process as it flows through the equipment being used. Although the operating pressure of the equipment is low, the flow rate requirement is high. Therefore, a high-low pressure conversion structure needs to be designed in the circulating system to ensure that the pressure and flow rate in the pipeline meet the operating requirements of the circulating system and the equipment being used. Utility Model Content

[0003] This invention provides a fluid circulation system with high and low pressure conversion function, which solves the problem of incompatibility between the pressure and flow rate of fluids in high-pressure pipelines and equipment.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] A fluid circulation system with high and low pressure switching function includes a water supply pipe, a water return pipe, and a user device. One end of the water supply pipe is connected in sequence to a pipeline filter, a pressure reducing valve, and the water inlet of the user device. One end of the water return pipe is connected in sequence to a check valve, a circulation pump, and the water outlet of the user device. The other ends of the water supply pipe and the other end of the water return pipe are connected to a circulation pipeline.

[0006] Furthermore, a manual valve is connected between the filter and the water supply pipe.

[0007] Furthermore, a manual valve is connected between the check valve and the return water pipe.

[0008] Furthermore, the water supply pressure of the water supply pipe is 0.4-0.6 MPa, the return water pressure of the return water pipe is 0.38-0.58 MPa, and the operating pressure of the equipment is less than 0.3 MPa.

[0009] Furthermore, the self-priming pressure of the circulating pump is 0.05-0.25 MPa.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This invention can effectively and safely apply equipment with low pressure requirements but high flow rate requirements to high-pressure fluid circulation systems, ensuring stable system operation and extending equipment service life. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the principle of the circulation system of this utility model;

[0014] In the diagram: 1-Filter, 2-Pressure reducing valve, 3-Check valve, 4-Circulation pump, 5-Manual valve one, 6-Manual valve two, 7-Water supply pipe, 8-Water return pipe, 9-Equipment in use. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0017] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0018] As shown in the figure, a fluid circulation system with high and low pressure switching function includes a water supply pipe 7, a return water pipe 8, and a user device 9. One end of the water supply pipe 7 is connected in sequence to a manual valve 5, a pipeline filter 1, a pressure reducing valve 2, and the inlet of the user device 9. One end of the return water pipe 8 is connected in sequence to a manual valve 6, a check valve 3, a circulation pump 4, and the outlet of the user device 9. The other ends of the water supply pipe 7 and the return water pipe 8 are connected to a circulation pipeline. The manual valves 5 and 6 facilitate later maintenance. The pipeline filter 1 is used to remove impurities from the fluid, prevent blockage and equipment wear, and protect the pressure reducing valve 2 and the circulation pump 4. The circulation pump 4 provides fluid power to the user device 9. The user device 9 is located before the inlet of the circulation pump 4. The self-priming force of the circulation pump 4 can increase the fluid pressure after the point of use, maintaining the flow rate requirement and return water pressure of the user device 9. The check valve 3 is used to prevent reverse flow of fluid and avoid backflow of high-pressure water into the user device 9 after the circulation pump 4 stops.

[0019] In one specific implementation, this application is used in a centralized chilled water circulation system. The supply water pressure of the supply pipe 7 is 0.4-0.6 MPa, the return water pressure of the return water pipe 8 is 0.38-0.58 MPa, and the connected equipment 9 is a tank cooling jacket with a pressure requirement of <0.28 MPa. The self-priming force of the circulation pump 4 is 0.05-0.25 MPa. Before the high-pressure fluid flows into the equipment 9 through the supply water pipe 7, the pressure reducing valve 2 reduces the pressure of the high-pressure fluid (supply water pressure) to a pressure suitable for the use of the equipment 9. Then, it flows out of the equipment 9, and the self-priming force of the circulation pump 4 raises the fluid pressure to match the return water pressure of the return water pipe 8. The circulation pump 4 and the pressure reducing valve 2 work together to ensure that the equipment 9 obtains a stable flow rate and pressure in the high-pressure circulation pipeline.

[0020] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A fluid circulation system with high and low pressure switching function, characterized in that: It includes a water supply pipe (7), a return water pipe (8), and a device (9). One end of the water supply pipe (7) is connected in sequence to a pipe filter (1), a pressure reducing valve (2), and the inlet of the device (9). One end of the return water pipe (8) is connected in sequence to a check valve (3), a circulation pump (4), and the outlet of the device (9). The other end of the water supply pipe (7) and the other end of the return water pipe (8) are connected to a circulation pipeline.

2. The fluid circulation system with high and low pressure switching function according to claim 1, characterized in that: A manual valve (5) is connected between the pipeline filter (1) and the water supply pipe (7).

3. The fluid circulation system with high and low pressure switching function according to claim 1, characterized in that: A manual valve 2 (6) is connected between the check valve (3) and the return water pipe (8).

4. The fluid circulation system with high and low pressure switching function according to claim 1, characterized in that: The water supply pressure of the water supply pipe (7) is 0.4-0.6 MPa, the return pressure of the return water pipe (8) is 0.38-0.58 MPa, and the operating pressure of the equipment (9) is less than 0.3 MPa.

5. The fluid circulation system with high and low pressure switching function according to claim 4, characterized in that: The self-priming pressure of the circulating pump (4) is 0.05-0.25 MPa.

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