Water supply pump set with differential pressure self-checking function

Abstract

A water supply pump set with a differential pressure self-checking function comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline and the second pipeline are each provided with a water inlet end and a water outlet end, one end of the second pipeline is connected with an inlet end communicating pipe, and the other end of the second pipeline is connected with an outlet end communicating pipe. One end of the inlet end communicating pipe is connected with the water inlet end of the first pipeline, the other end of the inlet end communicating pipe is connected with the water inlet end of the third pipeline, one end of the outlet end communicating pipe is connected with the water outlet end of the first pipeline, and the other end of the outlet end communicating pipe is connected with the water outlet end of the third pipeline. The first pipeline is connected with a first water pump, the third pipeline is connected with a second water pump, the first pipeline is provided with a first electric butterfly valve, the third pipeline is provided with a third electric butterfly valve, the inlet end communicating pipe and the outlet end communicating pipe are respectively provided with a standby electric butterfly valve, and the first pipeline, the second pipeline and the third pipeline are respectively provided with a self-checking differential pressure instrument. The pressure control device is convenient to control and realizes real-time monitoring of pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of water supply pumps, in particular to a water supply pump group with a pressure difference self-checking function. Background Art

[0002] The assembly of a general pump unit is divided into the front end of the pump, the rear end of the pump, the front end components, valves, Y-type filters, shock absorbers, and the rear end components of the pump, shock absorbers, check valves, and valves. When the water source flows to the front end of the pump unit, the pressure at the front end of the pump must have the minimum inlet pressure - NPSH, otherwise the pressure in the pump is lower than the vaporization pressure of the conveyed liquid, resulting in cavitation. The water source is transported to a distant place through the power of the pump unit to achieve water resource distribution and hydraulic application.

[0003] Although the liquid is transported to other places through the power source generated by the pump group, the assembly of the pump group, the selection of accessories, the number of filters at the front end, and the diameter of the flange interface, if the selection is incorrect or the installation is wrong, the entire pump group will be irreversibly damaged. The combination between the pump group and the accessories is connected by flanges, and the hardware must be inspected before assembly. In actual use, at the front end of the pump group, there is often unclean water with a lot of impurities and sediments. When passing through the Y-type filter, the relatively large sediment can be effectively intercepted, but at the same time it will reduce the water flow and the minimum inlet pressure. If it is in this state for a long time, the cavitation of the water pump will be very serious and it will bring safety hazards. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a water supply pump group with a pressure difference self-checking function.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A water supply pump group with a pressure difference self-checking function comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline and the second pipeline both have a water inlet end and a water outlet end, one end of the second pipeline is connected to an inlet connecting pipe, the other end of the second pipeline is connected to an outlet connecting pipe, one end of the inlet connecting pipe is connected to the water inlet end of the first pipeline, and the other end is connected to the water inlet end of the third pipeline, one end of the outlet connecting pipe is connected to the water outlet end of the first pipeline, and the other end is connected to the water outlet end of the third pipeline, a first water pump is installed on the first pipeline, a spare water pump is installed on the second pipeline, a second water pump is installed on the third pipeline, a first electric butterfly valve is provided on the first pipeline, a third electric butterfly valve is provided on the third pipeline, spare electric butterfly valves are respectively provided on the inlet connecting pipe and the outlet connecting pipe, and self-checking pressure difference instruments are provided on the first pipeline, the second pipeline and the third pipeline.

[0007] The self-testing pressure difference instrument on the first pipeline is located between the first water pump and the water inlet end of the first pipeline, the self-testing pressure difference instrument on the second pipeline is located between the standby water pump and the inlet connecting pipe, and the self-testing pressure difference instrument on the third pipeline is located between the second water pump and the water inlet end of the third pipeline.

[0008] Shock absorbers are arranged on the first pipeline, the second pipeline and the third pipeline.

[0009] The shock absorber on the first pipeline is located on one side of the first water pump, the shock absorber on the second pipeline is located on one side of the standby water pump, and the shock absorber on the third pipeline is located on one side of the second water pump.

[0010] The first pipeline, the second pipeline and the third pipeline are all provided with filters.

[0011] A first electric butterfly valve is respectively arranged at the water inlet end and the water outlet end of the first pipeline, and a third electric butterfly valve is respectively arranged at the water inlet end and the water outlet end of the third pipeline.

[0012] The self-checking pressure difference instrument comprises a pressure sensor and a pressure gauge. The pressure sensor is connected to the pressure gauge. A self-checking pressure difference instrument is respectively arranged at two ends of the filter.

[0013] The pressure sensor is communicatively connected to an external control terminal.

[0014] The liquid (water source) reaches the front end of the pump group, and the pump group provides the power source to deliver the liquid to the distant target location. Whether the liquid flows smoothly through the pump group is detected by the self-checking pressure difference device in real time, and the pressure difference data is compared in real time to make the flow rate of the liquid reach the best state, and also ensure the minimum inlet pressure at the front end of the pump to reduce cavitation. Automated real-time monitoring reduces equipment maintenance costs and personnel misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the first implementation method of the water inlet and outlet of the utility model;

[0017] Figure 3 This is a schematic diagram of the second implementation method of the water inlet and outlet of the utility model;

[0018] Figure 4 This is a schematic diagram of the third implementation method of the water inlet and outlet of the utility model;

[0019] Figure 5 This is a schematic diagram of a fourth implementation method of the water inlet and outlet of the utility model.

[0020] Reference numerals:

[0021] Spare electric butterfly valves 1, 2, 12, 14; third electric butterfly valves 3, 11; self-testing differential pressure instrument 4; filter 5; shock absorber 6; third water pump 7; elbow 8; auxiliary shock absorber 9; stop valve 10; spare water pump 13, first electric butterfly valves 15, 17; first water pump 16; first pipeline 18; second pipeline 19; third pipeline 20; water inlet connecting pipeline 21; water outlet connecting pipeline 22. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present utility model, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] like Figure 1As shown, a water supply pump group with a pressure difference self-checking function includes a first pipeline 18, a second pipeline 19 and a third pipeline 20, the first pipeline 18 and the second pipeline 19 both have a water inlet end and a water outlet end, one end of the second pipeline 19 is connected to an inlet end connecting pipe 21, and the other end of the second pipeline 19 is connected to an outlet end connecting pipe 22, one end of the inlet end connecting pipe 21 is connected to the water inlet end of the first pipeline 18, and the other end is connected to the water inlet end of the third pipeline 20, one end of the outlet end connecting pipe 22 is connected to the water outlet end of the first pipeline 18, and the other end is connected to the water outlet end of the third pipeline 20. The first pipeline 18 is connected to the water outlet end of the pipeline 20, the first water pump 16 is installed on the first pipeline 18, the second pipeline 19 is installed with a spare water pump 13, the third pipeline 20 is installed with a second water pump 7, the first pipeline 18 is provided with a first electric butterfly valve 17, the third pipeline 20 is provided with a third electric butterfly valve 3, the inlet end connecting pipe 21 is provided with a spare electric butterfly valve 1 and a spare electric butterfly valve 2, the outlet end connecting pipe 22 is provided with a spare electric butterfly valve 12 and a spare electric butterfly valve 14, and the first pipeline 18, the second pipeline 19 and the third pipeline 20 are all provided with a self-checking pressure difference instrument 4.

[0026] The self-testing pressure difference instrument on the first pipeline is located between the first water pump and the water inlet end of the first pipeline, the self-testing pressure difference instrument on the second pipeline is located between the standby water pump and the inlet connecting pipe, and the self-testing pressure difference instrument on the third pipeline is located between the second water pump and the water inlet end of the third pipeline.

[0027] Shock absorbers 6 are provided on the first pipeline 18, the second pipeline 19 and the third pipeline 20. The shock absorber on the first pipeline 18 is located on one side of the first water pump, the shock absorber on the second pipeline is located on one side of the standby water pump, and the shock absorber on the third pipeline is located on one side of the second water pump. The shock absorbers can reduce the vibration generated during the operation of each water pump.

[0028] The first pipeline 18, the second pipeline 19 and the third pipeline 20 are all provided with a filter 5, and the filter 5 is Y-shaped. The self-test differential pressure instrument includes a pressure sensor and a pressure gauge, the pressure sensor is connected to the pressure gauge, and a self-test differential pressure instrument is respectively provided at both ends of the filter, and the pressure sensor is communicatively connected to the external control end.

[0029] At the front and back ends of the Y-type filter, pressure sensors are added for real-time monitoring. When the water flow passes through, the pressure sensor extracts the values ​​before and after for comparison. If the comparison value is within 0.05Mpa, it is a normal state. When the comparison value exceeds 0.05Mpa, it is an abnormal state, and it is transmitted to the water supply system control cabinet in real time to make an abnormal alarm. Automated real-time monitoring reduces equipment maintenance costs and personnel misjudgment. An early warning device can also be added to not only improve the stability of the pump group, but also visually visualize the liquid flow dynamics at the front end of the pump through the pressure gauge.

[0030] For better control, a first electric butterfly valve 17 is provided at the water inlet end of the first pipeline 18, and a first electric butterfly valve 15 is provided at the water outlet end; a third electric butterfly valve 3 is provided at the water inlet end of the third pipeline 20, and a third electric butterfly valve 11 is provided at the water outlet end.

[0031] In addition, elbows 8 may be provided at the water outlets of the first pipeline, the second pipeline and the third pipeline, and water stop valves 10 may be connected thereto. Auxiliary shock absorbers 9 and other devices may also be provided to ensure the stability and reliability of the connection.

[0032] Each component is connected by flange bolts and nuts. To reduce disassembly and assembly during maintenance, the pressure difference at the front end of the pump is automatically monitored online in real time, and electronic technology is fully applied to industrial upgrades. It solves the problem of abnormal failures of water supply pump stations due to maintenance, failure, and excessive blockage of water impurities, improves the stability of water supply, and provides strong protection for factories, life, and production.

[0033] The utility model has different working modes.

[0034] like Figure 2 As shown, when the liquid (water source) starts from the water inlet end of the first pipeline 18, passes through the first electric butterfly valve 17, the self-test pressure difference instrument 4 on the first pipeline, the Y-type filter 5 on the first pipeline, the shock absorber 6 on the first pipeline, the first water pump 16, and the first electric butterfly valve 15, and flows out at the water outlet end of the first pipeline 18, the backup electric butterfly valve 1 and the backup electric butterfly valve 14 are in a closed state; Figure 3 As shown, when the first water pump 16 fails and stops, the control system will respond quickly, opening the backup electric butterfly valve 1 and the backup electric butterfly valve 14 on the connecting pipeline 21, and the backup water pump 13 will start to cut in the water supply immediately, while closing the first electric butterfly valve 17, the first electric butterfly valve 15, the backup electric butterfly valve 2 and the backup electric butterfly valve 12, and water will be discharged from the water outlet end of the first pipeline 18 to achieve uninterrupted water supply.

[0035] like Figure 4 As shown, the liquid (water source) starts from the water inlet end of the third pipeline 20, passes through the third electric butterfly valve 3, the self-test pressure difference instrument on the third pipeline, the Y-type filter on the third pipeline, the shock absorber 6 on the third pipeline, the second water pump 7, and the third electric butterfly valve 11, and is discharged at the water outlet end of the third pipeline. The standby electric butterfly valve 2 and the standby electric butterfly valve 12 are in a closed state; refer to Figure 5 When the third water pump 7 fails and stops, the control system will respond quickly, open the standby electric butterfly valve 2 and the standby electric butterfly valve 12, and the standby water pump 13 will start to supply water immediately, while closing the third electric butterfly valve 3, the third electric butterfly valve 11, the standby electric butterfly valve 1 and the standby electric butterfly valve 14, and water will be discharged from the water outlet of the third pipeline 20 to achieve uninterrupted water supply.

[0036] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water supply pump set with pressure difference self-checking function, characterized in that: The utility model comprises a first pipeline, a second pipeline and a third pipeline, wherein the first pipeline and the second pipeline both have a water inlet end and a water outlet end, one end of the second pipeline is connected to an inlet connecting pipe, the other end of the second pipeline is connected to an outlet connecting pipe, one end of the inlet connecting pipe is connected to the water inlet end of the first pipeline, and the other end is connected to the water inlet end of the third pipeline, one end of the outlet connecting pipe is connected to the water outlet end of the first pipeline, and the other end is connected to the water outlet end of the third pipeline, a first water pump is installed on the first pipeline, a spare water pump is installed on the second pipeline, a second water pump is installed on the third pipeline, a first electric butterfly valve is arranged on the first pipeline, a third electric butterfly valve is arranged on the third pipeline, spare electric butterfly valves are arranged on the inlet connecting pipe and the outlet connecting pipe respectively, and a self-checking pressure difference instrument is arranged on the first pipeline, the second pipeline and the third pipeline.

2. The water supply pump set with pressure difference self-checking function according to claim 1 is characterized in that: The self-testing pressure difference instrument on the first pipeline is located between the first water pump and the water inlet end of the first pipeline, the self-testing pressure difference instrument on the second pipeline is located between the standby water pump and the inlet connecting pipe, and the self-testing pressure difference instrument on the third pipeline is located between the second water pump and the water inlet end of the third pipeline.

3. The water supply pump set with pressure difference self-checking function according to claim 1, characterized in that: Shock absorbers are arranged on the first pipeline, the second pipeline and the third pipeline.

4. The water supply pump set with pressure difference self-checking function according to claim 1, characterized in that: The shock absorber on the first pipeline is located on one side of the first water pump, the shock absorber on the second pipeline is located on one side of the standby water pump, and the shock absorber on the third pipeline is located on one side of the second water pump.

5. The water supply pump set with pressure difference self-checking function according to claim 1, characterized in that: The first pipeline, the second pipeline and the third pipeline are all provided with filters.

6. The water supply pump set with pressure difference self-checking function according to claim 1, characterized in that: A first electric butterfly valve is respectively arranged at the water inlet end and the water outlet end of the first pipeline, and a third electric butterfly valve is respectively arranged at the water inlet end and the water outlet end of the third pipeline.

7. The water supply pump set with pressure difference self-checking function according to claim 5, characterized in that: The self-checking pressure difference instrument comprises a pressure sensor and a pressure gauge. The pressure sensor is connected to the pressure gauge. A self-checking pressure difference instrument is respectively arranged at two ends of the filter.

8. The water supply pump set with pressure difference self-checking function according to claim 7, characterized in that: The pressure sensor is communicatively connected to an external control terminal.

Images