Pressure-regulating water supply system

Abstract

The utility model relates to the technical field of pure water supply, and discloses a pressure regulating water supply system which comprises a water tank, a water conveying pipeline, a water pump, a water outlet pipeline, a temperature sensor and a frequency converter. A water outlet of the water pump is provided with a flexible connector used for being connected with one end of the water outlet pipeline, the other end of the water outlet pipeline is provided with a plurality of water using ports, the water using ports are provided with pressure sensors, and the water pump, the pressure sensors, the temperature sensor and the frequency converter are electrically connected. The frequency converter is used for controlling the rotating speed of a motor in the water pump, and the detection end of the temperature sensor is located in the water pump and used for monitoring the temperature of the motor in the water pump. The water pump has the advantages that the rotating speed of the motor in the water pump can be adjusted according to the actual flushing pressure requirement of the PCB, meanwhile, the temperature of the motor in the water pump can be monitored, and the water pump is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of pure water supply, in particular to a pressure regulating water supply system. Background Art

[0002] In the prior art, when producing PCB boards, it is necessary to use a water pump to deliver pure water to rinse the surface of the PCB boards on the production line. When the water pressure is insufficient, the surface of the PCB boards cannot be rinsed clean. When the water pressure is too high, it will impact the circuits on the PCB boards, causing irreversible damage to the PCB boards, affecting the normal use of the PCB boards. When the existing water supply system delivers pure water, the power rating of the water pump, that is, the speed and pressure are fixed. When the specifications of the PCB boards produced on the production line change, when the flushing pressure required for the PCB boards to be flushed is large, the water pressure cannot be adjusted and cannot meet the production line requirements; when the flushing pressure required for the PCB boards to be flushed is small, the water pressure cannot be adjusted, which can easily damage the PCB boards. In addition, when the water pump is supplying water for a long time, the motor inside the water pump is prone to heat up, and the motor is easily damaged, causing damage to the water pump. Utility Model Content

[0003] The purpose of the utility model is to provide a pressure-regulated water supply system, which can adjust the speed of the motor in the water pump according to the actual flushing pressure requirement of the PCB board, and at the same time, monitor the temperature of the motor in the water pump to avoid damage to the water pump.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a pressure-regulated water supply system, including a water tank, a water supply pipeline, a water pump, a water outlet pipeline, a temperature sensor and a frequency converter, wherein the water tank is used to provide pure water, the water tank is connected to one end of the water supply pipeline, the other end of the water supply pipeline is connected to the water inlet of the water pump, the water outlet of the water pump is provided with a flexible joint for connecting to one end of the water outlet pipeline, the other end of the water outlet pipeline is provided with a plurality of water use ports, the water use port is provided with a pressure sensor, the water pump, the pressure sensor, the temperature sensor and the frequency converter are electrically connected, the frequency converter is used to control the speed of the motor in the water pump, and the detection end of the temperature sensor is located in the water pump for monitoring the temperature of the motor in the water pump.

[0005] Furthermore, a check valve is connected between the flexible joint and the water outlet pipe.

[0006] Furthermore, the pressure sensor is connected to a pressure gauge for displaying pressure parameters.

[0007] Furthermore, the water supply pipe extends into the water tank, and the distance between the end of the water supply pipe and the bottom of the water tank is less than or equal to 15 mm.

[0008] Furthermore, the water tank is also provided with a water inlet interface for connecting with external pure water supply equipment.

[0009] Furthermore, valves are provided on the plurality of water use ports.

[0010] Furthermore, the frequency converter is provided with a display screen for displaying power supply parameters, pressure parameters and temperature parameters.

[0011] Furthermore, the flexible joint comprises a flexible body, an inner liner and a flange, the outer walls at both ends of the flexible body are sleeved with the flanges, and the inner wall of the flexible body is fitted with the inner liner.

[0012] Compared with the prior art, the pressure-regulated water supply system of the utility model embodiment has the following beneficial effects: a frequency converter is provided, and a pressure sensor is provided at the water supply port, and the water pump, pressure sensor, temperature sensor and frequency converter are electrically connected. The frequency converter can control the motor speed in the water pump according to the pressure demand of the water supply port, and adjust the pressure of the water supply port. It can be used for flushing PCB boards of different specifications, and has strong versatility. At the same time, the temperature sensor can monitor the temperature of the motor in the water pump in real time to avoid damage to the water pump caused by overheating of the motor. In addition, a soft joint is provided, and when the water pump shakes during operation, the soft joint can slow down the vibration to avoid severe vibration of the water supply port. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural principle diagram of the pressure regulating water supply system of the utility model embodiment;

[0014] Figure 2 It is a structural schematic diagram of a flexible joint of a pressure regulating water supply system according to an embodiment of the utility model.

[0015] In the figure, 1. water tank; 11. water inlet interface; 2. water delivery pipeline; 3. water pump; 4. water outlet pipeline; 41. water use port; 5. temperature sensor; 6. frequency converter; 61. display screen; 7. flexible joint; 71. flexible body; 72. lining; 73. flange; 8. pressure sensor; 81. pressure gauge; 9. check valve. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices and elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] like Figure 1 As shown, a pressure regulating water supply system according to a preferred embodiment of the utility model comprises a water tank 1, a water delivery pipeline 2, a water pump 3, a water outlet pipeline 4, a temperature sensor 5 and a frequency converter 6. Among them, the water tank 1 is used to provide pure water. The water tank 1 is connected to one end of the water supply pipe 2, and the other end of the water supply pipe 2 is connected to the water inlet of the water pump 3. Since the water pump 3 is driven by an internal motor, the motor will shake during operation. In order to avoid severe shaking at the water port 41 of the water outlet pipe 4, a soft joint 7 for connecting to one end of the water outlet pipe 4 is provided at the water outlet of the water pump 3. In order to achieve simultaneous cleaning of PCB boards of the same specification, a plurality of water ports 41 are provided at the other end of the water outlet pipe 4. The plurality of water ports 41 are arranged in parallel. In order to control the pressure of each water port 41, a pressure sensor 8 is provided at the water port 41. The water pump 3, the pressure sensor 8, the temperature sensor 5 and the frequency converter 6 are electrically connected. The frequency converter 6 is used to control the motor speed in the water pump 3, and then adjust the water pressure at the water port 41. The detection end of the temperature sensor 5 is located in the water pump 3, which is used to monitor the temperature of the motor in the water pump 3 to avoid overheating of the motor.

[0019] In this embodiment, in order to prevent the motor in the water pump 3 from turning over, a check valve 9 is connected between the flexible joint 7 and the water outlet pipe 4, and the check valve 9 can also slow down the decrease of water pressure. Further, in order to facilitate reading the pressure parameters of the pressure sensor 8, a pressure gauge 81 for displaying the pressure parameters is connected to the pressure sensor 8.

[0020] In this embodiment, in order to facilitate the extraction of pure water in the water tank 1, the water delivery pipe 2 extends into the water tank 1, and the distance between the end of the water delivery pipe 2 and the bottom of the water tank 1 is less than or equal to 15 mm. In order to facilitate the supply of pure water in the water tank 1, a water inlet interface 11 is also provided on the water tank 1 for connecting with an external pure water supply device. In this embodiment, in order to facilitate the individual control of the opening of each water port 41, valves are provided on the multiple water ports 41, and the valves can control the water outflow of the water ports 41.

[0021] Furthermore, in this embodiment, since the pressure sensor 8, the temperature sensor 5, and the water pump 3 are all electrically connected to the frequency converter 6, in order to facilitate the display of the working parameters of the frequency converter 6, the pressure sensor 8, the temperature sensor 5, and the water pump 3, the frequency converter 6 is provided with a display screen 61 for displaying power supply parameters, pressure parameters, temperature parameters, and the speed of the motor. The parameters can be adjusted according to actual production needs.

[0022] Further, in order to facilitate the design of the structure of the flexible joint 7, refer to Figure 2 In this embodiment, the flexible joint 7 includes a flexible body 71, an inner lining 72 and a flange 73. The outer walls of both ends of the flexible body 71 are sleeved with flanges 73, and the inner wall of the flexible body 71 is fitted with an inner lining 72. The flexible body 71 is generally made of rubber material and has a certain elasticity. The inner lining 72 is used to support the flexible body 71 to prevent the flexible body 71 from excessive deformation. The flange 73 is used to quickly connect with the water outlet of the water pump 3 and the water outlet pipe 4.

[0023] The working process of the utility model is as follows: when the water pressure at the water port 41 is relatively low, the pressure sensor 8 sends a voltage signal to the frequency converter 6, so that the output frequency of the frequency converter 6 increases, thereby increasing the motor speed in the water pump 3, thereby increasing the water pressure at the water port 41. When the water pressure at the water port 41 is relatively high, the pressure sensor 8 feeds back an electrical signal to the frequency converter 6, so that the frequency converter 6 reduces the output frequency, thereby reducing the speed of the water pump 3. Through the signal feedback between the frequency converter 6 and the pressure sensor 8, the water pressure at the water port 41 given by the water pump 3 fluctuates slightly within the set value. When the motor shakes when it rotates, the flexible joint 7 can well achieve the effect of shock absorption.

[0024] In summary, the embodiment of the utility model provides a pressure-regulated water supply system, which is provided with a frequency converter 6, and a pressure sensor 8 is provided at the water port 41. At the same time, the water pump 3, the pressure sensor 8, the temperature sensor 5 and the frequency converter 6 are electrically connected. The frequency converter 6 can control the motor speed in the water pump 3 according to the pressure demand of the water port 41, and adjust the pressure of the water port 41. It can be used for flushing PCB boards of different specifications, and has strong versatility. At the same time, the temperature sensor 5 can monitor the temperature of the motor in the water pump 3 in real time to avoid damage to the water pump 3 caused by overheating of the motor. In addition, a soft joint 7 is provided. When the water pump 3 shakes during operation, the soft joint 7 can slow down the vibration to avoid severe vibration of the water port 41.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A pressure regulating water supply system, characterized in that: It includes a water tank, a water supply pipeline, a water pump, a water outlet pipeline, a temperature sensor and a frequency converter, the water tank is used to provide pure water, the water tank is connected to one end of the water supply pipeline, the other end of the water supply pipeline is connected to the water inlet of the water pump, the water outlet of the water pump is provided with a flexible joint for connecting to one end of the water outlet pipeline, the other end of the water outlet pipeline is provided with a plurality of water use ports, the water use port is provided with a pressure sensor, the water pump, the pressure sensor, the temperature sensor and the frequency converter are electrically connected, the frequency converter is used to control the speed of the motor in the water pump, the detection end of the temperature sensor is located in the water pump, and is used to monitor the temperature of the motor in the water pump.

2. The pressure regulating water supply system according to claim 1, characterized in that: A check valve is connected between the flexible joint and the water outlet pipe.

3. The pressure regulating water supply system according to claim 1, characterized in that: The pressure sensor is connected with a pressure gauge for displaying pressure parameters.

4. The pressure regulating water supply system according to claim 1, characterized in that: The water delivery pipe extends into the water tank, and the distance between the end of the water delivery pipe and the bottom of the water tank is less than or equal to 15 mm.

5. The pressure regulating water supply system according to claim 1, characterized in that: The water tank is also provided with a water inlet interface for connecting with external pure water supply equipment.

6. The pressure regulating water supply system according to claim 1, characterized in that: Valves are provided on the plurality of water use ports.

7. The pressure regulating water supply system according to claim 1, characterized in that: The frequency converter is provided with a display screen for displaying power supply parameters, pressure parameters and temperature parameters.

8. The pressure regulating water supply system according to claim 1, characterized in that: The flexible joint comprises a flexible body, an inner liner and a flange. The outer walls at both ends of the flexible body are sleeved with the flanges, and the inner wall of the flexible body is fitted with the inner liner.

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