Production type uninterrupted constant pressure water supply device

Abstract

The utility model relates to water supply device technical field especially, it relates to a kind of production type uninterrupted constant-pressure water supply device, it mainly includes: incoming flow main pipe, first branch pipe, first constant-pressure water supply unit, second branch pipe, second constant-pressure water supply unit, drain main pipe, drain branch pipe, pressure sensor and controller and so on several parts;Controller continuously receives the pipe network pressure feedback of pressure sensor, and the signal is compared with internal preset parameter and PID operation, and then accurate control instruction is sent to first constant-pressure water supply unit and second constant-pressure water supply unit, finally realizes the intelligent management to multiple working conditions, ensures the continuous stability of water supply pressure.

Description

Technical Field

[0001] This utility model relates to the field of water supply device technology, and in particular to a production-type uninterrupted constant pressure water supply device. Background Technology

[0002] In continuous production enterprises such as machining, it is common for multiple pieces of equipment to use water simultaneously or asynchronously. Because the production cycles of each piece of equipment are inconsistent, the instantaneous flow rate of the water supply network fluctuates frequently. At the same time, such production processes have extremely high requirements for the continuity of water flow and the stability of water supply pressure, thus creating a sharp contradiction.

[0003] However, traditional variable frequency pump systems lack closed-loop automatic adjustment capabilities based on pipeline pressure, making it impossible to effectively respond to such dynamic loads, resulting in fluctuations in water supply pressure and making it difficult to meet high-standard process requirements.

[0004] To address the aforementioned issues, existing technologies commonly employ a "constant pressure tank + variable frequency pump" urban constant pressure water supply solution. While this solution can achieve basic constant pressure, it reveals a series of inherent defects in continuous industrial production scenarios: First, its pump switching (pump reversal) logic adopts a "stop the main pump first, then start the standby pump" mode, resulting in a significant delay in the standby pump's startup and causing substantial fluctuations in water supply pressure. Second, when the main pump abnormally stops, the standby pump cannot be quickly and automatically activated, and the slow response severely impacts production continuity. Furthermore, if pump reversal is performed manually, two skilled workers are required to operate the system, which not only incurs high labor costs but also still leads to pressure fluctuations due to coordination errors. Utility Model Content

[0005] The purpose of this invention is to provide a production-type uninterrupted constant pressure water supply device to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] Production-type uninterrupted constant pressure water supply system includes:

[0008] The main inlet pipe is connected at one end to the production water supply.

[0009] The first branch pipe has one end connected to the other end of the main inlet pipe;

[0010] The first constant pressure water supply unit is installed on the first branch pipe;

[0011] The second branch pipe has one end connected to the other end of the main inlet pipe and is arranged in parallel with the first branch pipe;

[0012] The second constant pressure water supply unit is installed on the second branch pipe;

[0013] The main drain pipe has one end connected to the other end of the first branch pipe and the second branch pipe, and the other end connected to the drain branch pipe.

[0014] A pressure sensor is installed on the main drain pipe;

[0015] The controller is electrically connected to the pressure sensor, the first constant pressure water supply unit, and the second constant pressure water supply unit.

[0016] Optionally, the controller is preset with a target pressure value, a redundant pressure lower limit, and a pressure setting increment. The first constant pressure water supply unit and the second constant pressure water supply unit are respectively connected to the target pressure value, the redundant pressure lower limit, and the pressure setting increment signal.

[0017] Optionally, the first constant pressure water supply unit includes:

[0018] The first water supply pump is installed on the first branch pipe;

[0019] The first frequency converter is electrically connected to the first water supply pump and controller.

[0020] Optionally, the second constant pressure water supply unit includes:

[0021] The second water supply pump is installed on the second branch pipe;

[0022] The second frequency converter is electrically connected to the second water supply pump and controller.

[0023] Optionally, the number of pressure sensors is two sets.

[0024] Optionally, one set of the two pressure sensors is model Rosemount 3051GP2A2B21AHR5, and the other set is model EJA430E.

[0025] Optionally, the controller has a preset pressure deviation threshold, and the pressure deviation threshold and the target pressure value are associated with the two sets of pressure sensors.

[0026] Optionally, it also includes a storage container, through which the inlet main is connected to the production water supply.

[0027] Optionally, a level gauge is installed inside the storage container, and the level gauge is electrically connected to the controller.

[0028] Optionally, local pressure gauges are installed on the first branch pipe and the second branch pipe respectively.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] Under normal constant pressure water supply conditions, a closed-loop control system is formed by a pressure sensor, a controller, and a first constant pressure water supply unit and / or a second constant pressure water supply unit to achieve real-time adjustment of the pipeline pressure, effectively respond to changes in flow rate, and maintain a dynamic constant water supply pressure.

[0031] In the seamless fault switching mode, the controller uses the "redundant pressure lower limit" as the fault criterion. Once the pressure of the first constant pressure water supply unit drops to this threshold, the second constant pressure water supply unit is immediately started and the load is quickly taken over from zero speed frequency. This achieves seamless switching when the first constant pressure water supply unit fails, ensuring the continuity of water supply.

[0032] During the smooth pump reversal process, the controller temporarily increases the pressure setpoint of the standby unit (the second constant pressure water supply unit) by a small increment, allowing it to start operating first and gradually take over the load. Simultaneously, it monitors the frequency of the original operating unit (the first constant pressure water supply unit), and shuts it down once it drops to a preset low-speed threshold. Finally, the second constant pressure water supply unit is restored to the target pressure value. This entire process achieves "start first, then stop, smooth load transfer," completely avoiding pressure fluctuations and human error inherent in traditional pump reversal methods.

[0033] The above three operating conditions form a complete technical closed loop, jointly constructing a highly stable, highly reliable, and intelligent constant pressure water supply solution. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall structure of this application.

[0036] Figure label:

[0037] 1. Main inlet pipe; 2. First branch pipe;

[0038] 31. First water supply pump; 32. First frequency converter;

[0039] 4. Second division of responsibilities;

[0040] 51. Second water supply pump; 52. Second frequency converter;

[0041] 6. Drainage main pipe; 7. Pressure sensor; 8. Controller; 9. Storage container; 10. Level gauge; 11. Local pressure gauge. Detailed Implementation

[0042] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0043] Given the inherent defects exposed by the existing urban constant pressure water supply scheme that commonly adopts "constant pressure gas tank + variable frequency pump".

[0044] like Figure 1 As shown in the figure, this utility model embodiment provides a production-type uninterrupted constant pressure water supply device, which mainly includes: an inlet main pipe 1, a first branch pipe 2, a first constant pressure water supply unit, a second branch pipe 4, a second constant pressure water supply unit, an outlet main pipe 6, an outlet branch pipe (not shown in the figure), a pressure sensor 7, and a controller 8.

[0045] The main inlet pipe 1 is connected to the production water supply, and the first branch pipe 2 is connected to the main inlet pipe 1, on which the first constant pressure water supply unit is installed.

[0046] The second branch pipe 4 is parallel to the first branch pipe 2 and is connected to the inlet main pipe 1. A second constant pressure water supply unit is installed on it.

[0047] The main drain pipe 6 is connected to the first branch pipe 2 and the second branch pipe 4, and a pressure sensor 7 is installed on it.

[0048] One end of the drainage branch pipe is connected to the main drainage pipe 6, and the other end is connected to each water-using equipment.

[0049] The controller 8 is electrically connected to the pressure sensor 7, the first constant pressure water supply unit and the second constant pressure water supply unit, and has preset parameters including the target pressure value, the lower limit of the redundant pressure and the pressure setting increment.

[0050] During operation, the controller 8 continuously receives pipeline pressure feedback from the pressure sensor 7, compares the signal with internal preset parameters and performs PID calculations, and then sends precise control commands to the first constant pressure water supply unit and the second constant pressure water supply unit, ultimately achieving intelligent management of various working conditions and ensuring continuous and stable water supply pressure.

[0051] Specifically, the first constant pressure water supply unit mainly includes several parts such as the first water supply pump 31 and the first frequency converter 32.

[0052] The first water supply pump 31 is installed on the first branch pipe 2, and the first motor inside it is electrically connected to the first frequency converter 32. The first frequency converter 32 is electrically connected to the controller 8.

[0053] During operation, the controller 8 compares the pipeline pressure signal fed back by the pressure sensor 7 with the set target pressure value. Based on the deviation, it calculates the deviation using a built-in PID control algorithm and outputs a control signal to the first frequency converter 32. The first frequency converter 32 adjusts the frequency and voltage of its output power supply accordingly, thereby changing the operating speed of the first motor. When the pressure signal value fed back by the pressure sensor 7 is lower than the set target pressure value, the controller 8 instructs the first frequency converter 32 to increase its output frequency, and the first water supply pump 31 to increase its water supply, causing the pipeline pressure to rise. Conversely, when the pressure signal value fed back by the pressure sensor 7 is higher than the set target pressure value, the controller instructs the first frequency converter 32 to decrease its output frequency, and the first water supply pump 31 to decrease its water supply, causing the pipeline pressure to drop. Through this closed-loop control, a dynamic constant water supply pressure is ultimately achieved.

[0054] The second constant pressure water supply unit mainly includes: the second water supply pump 51 and the second frequency converter 52, etc.

[0055] The second water supply pump 51 is installed on the second branch pipe 4, and the second motor inside it is electrically connected to the second frequency converter 52. The second frequency converter 52 is electrically connected to the controller 8.

[0056] Similarly, the controller 8 compares the pipeline pressure signal fed back by the pressure sensor 7 with the set target pressure value, calculates the deviation using its built-in PID control algorithm, and then outputs a control signal to the second frequency converter 52. The second frequency converter 52 adjusts the frequency and voltage of its output power supply accordingly, thereby changing the operating speed of the second motor. When the pressure signal value fed back by the pressure sensor 7 is lower than the set target pressure value, the controller 8 instructs the second frequency converter 52 to increase its output frequency, and the second water supply pump 51 to increase its water supply, causing the pipeline pressure to rise again; conversely, when the pressure signal value fed back by the pressure sensor 7 is higher than the set target pressure value, the controller instructs the second frequency converter 52 to decrease its output frequency, and the second water supply pump 51 to decrease its water supply, causing the pipeline pressure to drop. Through this closed-loop control, the dynamic constant water supply pressure is ultimately achieved.

[0057] Specifically, the constant pressure water supply device in this embodiment mainly includes the following three operating conditions:

[0058] Under normal constant pressure water supply conditions: Controller 8 designates the first constant pressure water supply unit as the main unit and puts it into operation. Its first frequency converter 32 drives the first water supply pump 31 and adjusts the frequency in real time according to the feedback from the pressure sensor 7 to independently maintain the constant pressure of the pipeline network. The second constant pressure water supply unit is in hot standby mode.

[0059] Seamless fault switching operation: When the main unit (first constant pressure water supply unit) suddenly stops due to a fault, the pressure in the main drain pipe 6 begins to drop. The controller 8 monitors this pressure in real time through the pressure sensor 7. Once the value drops to the preset redundant pressure lower limit, it determines that the main unit has failed and immediately sends a start command to the standby unit (second constant pressure water supply unit). The second frequency converter 52 of the standby unit drives the second water supply pump 51 to rapidly increase its frequency from zero speed until it takes over the entire load and restores the pipeline pressure to the target pressure value, thereby achieving uninterrupted water supply.

[0060] Disruptive Pump Switching Operation: When a proactive switching of operating units is required, the operator issues a "pump switching" command to controller 8. Controller 8 then executes the disruptive switching logic: First, it temporarily increases the internal pressure setpoint of the standby unit (second constant pressure water supply unit) by a small increment (e.g., target pressure value + 0.01MPa), i.e., the pressure setpoint increment. The standby unit then begins to operate at a higher frequency, outputting a higher pressure water flow to the pipeline network and gradually taking on the main load. At the same time, the original operating unit (first constant pressure water supply unit) automatically reduces its frequency due to the reduced load. When controller 8 detects that the operating frequency of the original operating unit has dropped to a preset low-speed threshold (e.g., 25Hz), it controls it to shut down. Subsequently, controller 8 restores the pressure setpoint of the currently operating unit (second constant pressure water supply unit) to the target pressure value. Throughout the entire process, the pipeline pressure remains stable within the target pressure value or slightly higher than the target pressure value, achieving a smooth and disruptive switching between operating units (first constant pressure water supply unit, second constant pressure water supply unit).

[0061] Furthermore, in this embodiment, there are two sets of pressure sensors 7. That is, a redundant configuration of one in use and one on standby is adopted. Both sets of sensors are installed on the drain manifold 6 and are electrically connected to the controller 8.

[0062] The controller 8 continuously compares the readings of the two sets of pressure sensors 7. When the primary sensor experiences a fault such as disconnection, drift, or failure, causing its reading to deviate significantly from that of the backup sensor beyond the allowable range, the controller 8 can immediately and automatically switch to the backup sensor, using its reading as the feedback basis for constant pressure control, thereby maintaining continuous and stable control and achieving online maintenance (i.e., troubleshooting without shutting down the system).

[0063] Specifically, the controller 8 has a preset pressure deviation threshold (e.g., 0.02 MPa). When the difference between the readings of the primary sensor and the backup sensor continuously exceeds this threshold, a switching action is triggered. For example, if the target pressure value is 0.5 MPa, and the reading of the primary sensor suddenly changes to 0.4 MPa while the reading of the backup sensor remains at 0.5 MPa, the difference of 0.1 MPa is greater than the threshold of 0.02 MPa. The controller 8 will immediately determine that the primary sensor is inaccurate and automatically switch to the backup sensor.

[0064] Of course, besides the methods described above, the switching between the primary and backup sensors can also be achieved through manual operation. The specific operation method is existing technology and will not be elaborated upon in this embodiment. Preferably, in this embodiment, one set of pressure sensors 7 is a Rosemount 3051GP2A2B21AHR5, and the other set of pressure sensors 7 is an EJA430E.

[0065] Furthermore, the constant pressure water supply device in this embodiment also includes a storage container 9, and the inlet main pipe 1 is connected to the production water supply through the storage container 9. The storage container 9 is configured as a storage container for dynamic buffering and stabilizing system pressure, and its operation involves continuous and real-time water inflow and outflow.

[0066] The storage container 9 effectively absorbs pressure fluctuations in the pipeline network caused by instantaneous changes in production water consumption, creating a buffer time for the smooth response of the first and / or second constant pressure water supply units, thereby significantly reducing the frequent start-up and shutdown of the first and / or second constant pressure water supply units. This not only ensures extreme stability of the water supply pressure but also reduces the losses of the first and second constant pressure water supply units, extends their service life, and achieves energy-saving operation.

[0067] Furthermore, a level gauge 10 is installed inside the storage container 9, which is electrically connected to the controller 8. The controller 8 collects the level data of the level gauge 10 in real time, compares the level data with a preset safety threshold, and executes corresponding protective commands when the level is abnormal, such as performing an alarm or other actions when the level is low or high.

[0068] Furthermore, local pressure gauges 11 are installed on the first branch pipe 2 and the second branch pipe 4 respectively. These local pressure gauges 11 do not participate in automatic control but serve as offline calibration devices for manual inspection. Maintenance personnel can periodically compare their readings with the remote readings of the pressure sensor 7, thereby enabling early detection of abnormalities and planned maintenance in case of subtle drift or failure to trigger an electrical alarm in the pressure sensor 7. This manual inspection method, together with the automatic control system comprised of the pressure sensor 7, controller 8, first constant pressure water supply unit, and second constant pressure water supply unit, forms a redundant design, creating a multi-layered guarantee of "automatic monitoring as the primary method and manual calibration as a supplementary method," further enhancing the long-term reliability of the constant pressure water supply device.

[0069] It is important to note that in this embodiment, the pressure parameter design (redundant lower pressure limit for seamless fault switching, and pressure set increment for disturbance-free pump reversal) in both seamless fault switching and disturbance-free pump reversal scenarios is a strategic trade-off. The design intent is to completely avoid the drastic pressure fluctuations and even production interruptions caused by "stopping the main pump before starting the standby pump" or "the standby pump's inability to quickly and automatically engage when the main pump fails," as is common in existing technologies. These minor disturbances do not substantially affect the constant pressure requirements of the production process and are necessary and optimized control measures to achieve higher levels of reliability and continuity.

[0070] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A production-type uninterrupted constant pressure water supply device, characterized in that, include: The main inlet pipe is connected at one end to the production water supply. The first branch pipe has one end connected to the other end of the main inlet pipe; A first constant pressure water supply unit is installed on the first branch pipe; a second branch pipe has one end connected to the other end of the main inlet pipe and is connected in parallel with the first branch pipe; a second constant pressure water supply unit is installed on the second branch pipe; a main outlet pipe has one end connected to the other end of the first and second branch pipes and the other end connected to a drain branch pipe; a pressure sensor is installed on the main outlet pipe; and a controller is electrically connected to the pressure sensor, the first constant pressure water supply unit, and the second constant pressure water supply unit.

2. The production-type uninterrupted constant pressure water supply device according to claim 1, characterized in that, The controller is preset with a target pressure value, a redundant pressure lower limit, and a pressure setting increment. The first constant pressure water supply unit and the second constant pressure water supply unit are respectively connected to the target pressure value, the redundant pressure lower limit, and the pressure setting increment signal.

3. The production-type uninterrupted constant pressure water supply device according to claim 1, characterized in that, The first constant pressure water supply unit includes: a first water supply pump, which is installed on the first branch pipe; and a first frequency converter, which is electrically connected to the first water supply pump and the controller.

4. The production-type uninterrupted constant pressure water supply device according to claim 1 or 3, characterized in that, The second constant pressure water supply unit includes: a second water supply pump, installed on the second branch pipe; and a second frequency converter, electrically connected to the second water supply pump and the controller.

5. The production-type uninterrupted constant pressure water supply device according to claim 2, characterized in that, The pressure sensors are in two sets.

6. The production-type uninterrupted constant pressure water supply device according to claim 5, characterized in that, One of the two sets of pressure sensors is model Rosemount 3051GP2A2B21AHR5, and the other is model EJA430E.

7. The production-type uninterrupted constant pressure water supply device according to claim 5, characterized in that, The controller has a preset pressure deviation threshold, and the pressure deviation threshold and the target pressure value are associated with the two sets of pressure sensors.

8. The production-type uninterrupted constant pressure water supply device according to claim 1, characterized in that, It also includes a storage container, through which the inlet main pipe is connected to the production water supply.

9. The production-type uninterrupted constant pressure water supply device according to claim 8, characterized in that, A level gauge is installed inside the storage container, and the level gauge is electrically connected to the controller.

10. The production-type uninterrupted constant pressure water supply device according to claim 1, characterized in that, Local pressure gauges are installed on the first branch pipe and the second branch pipe respectively.

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