Integrated water supply pressurizing, pressure stabilizing and noise reducing device and control method

Abstract

The application relates to an integrated water supply pressurizing, pressure stabilizing and noise reducing device and a control method, which comprises a base, two groups of centrifugal pumps symmetrically arranged on the base, a sliding cover soundproof cover arranged on the centrifugal pump, two groups of constant pressure devices and an adjusting mechanism provided with a threaded rod and a positioning block, a telescopic rod provided with a position feedback switch, a rotary encoder arranged at the outer end of the threaded rod, and a programmable logic controller electrically connected with the position feedback switch, the centrifugal pump frequency converter, the constant pressure device and the differential pressure transmitter. When the positioning block is clamped into the positioning groove, the constant pressure device operates at the designed pressure; when the positioning block is separated from the positioning groove, the time limit is reached; the encoder identifies three gear opening degrees of the soundproof cover to switch the pump group and the constant pressure mode; the programmable logic controller predicts the water load sliding average in the previous 30 minutes, starts the constant pressure device to supplement air in advance for 30-60 seconds, and dynamically tracks. The application has the beneficial effects that the air supplement is actively predicted, the high-rise water supply end pressure fluctuation is reduced, and the noise reduction and maintenance convenience are considered.

Description

Technical Field

[0001] This invention relates to the field of water supply engineering pressurization equipment, specifically to an integrated water supply pressurization, stabilization, and noise reduction device and control method. Background Technology

[0002] Pipeline pressurization is a common technique in water transportation, such as for water supply in high-rise buildings, where it is necessary to transport fluids to higher elevations. Centrifugal pumps are the most common modern pipeline pressurization technology. Their basic principle involves connecting an impeller to a motor; the rotating impeller transfers kinetic energy to the liquid, increasing its velocity and pressure. Under centrifugal force, the liquid is discharged from the center outwards, thus achieving transportation.

[0003] Existing pipeline booster devices mostly rely solely on centrifugal pumps for pressurization, resulting in poor pressure stabilization. Water pressure fluctuates and weakens during transport, leading to insufficient pressure at the end of the supply line and failing to meet the stable water supply needs of high-rise buildings. Furthermore, centrifugal pumps generate significant noise during operation, polluting the surrounding environment and potentially impacting the health and well-being of workers. While some existing water supply systems incorporate soundproofing structures, these are often fixed and cannot be easily opened or closed. This makes maintenance and repair of the centrifugal pump extremely inconvenient, requiring the removal of the soundproofing structure and increasing maintenance costs.

[0004] More importantly, in the existing publicly available water supply systems, the opening and closing of the soundproof enclosure, the start and stop of the constant pressure equipment, and the air injection action of the air pump are mostly independent subsystems. The soundproof enclosure only exists as a noise shielding component and is not related to the pressure stabilization safety chain. The constant pressure equipment is mostly passively replenished with air after the pressure has dropped, resulting in a delayed response. During maintenance, it is necessary to manually stop the pump, depressurize, and then open the enclosure, which is a cumbersome process and is prone to the risk of pressurized operation due to misoperation.

[0005] Therefore, it is very necessary to provide an integrated water supply pressurization, stabilization, and noise reduction device and control method to solve the above-mentioned technical problems. Summary of the Invention

[0006] Based on the above description, the present invention provides an integrated water supply pressurization, stabilization, and noise reduction device and control method to solve the problems of poor pressure stabilization effect and inconvenient maintenance caused by the non-adjustable soundproof cover in the prior art water supply pressurization device.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: An integrated water supply pressurization, stabilization and noise reduction device includes a base, two sets of centrifugal pumps symmetrically arranged on the base, a sound insulation cover slidably connected to the base and covering the centrifugal pumps, two sets of constant pressure devices and an adjustment mechanism arranged on the base. The adjustment mechanism includes a housing connected to the bottom of the base and a threaded rod rotatably connected to the housing. Both ends of the threaded rod are threadedly connected to threaded slides. The two threaded slides are respectively connected to the two sound insulation covers. A turntable is connected to the threaded rod. The turntable is located on the outside of the housing. A telescopic rod is connected to the outside of the housing. A positioning block is connected to the telescopic rod. The positioning block is engaged with the turntable in the locked position. The telescopic rod is equipped with a position feedback switch, which is electrically connected to a programmable logic controller (PLC). The PLC is electrically connected to the frequency converters of the two sets of constant pressure equipment and the two centrifugal pumps.

[0008] Furthermore, the position feedback switch is configured as follows: When the positioning block engages with the positioning slot, the programmable logic controller allows the constant pressure device to operate at the designed outlet pressure. run; When the positioning block disengages from the positioning slot, the programmable logic controller limits the maximum air injection pressure of the constant pressure device to [value missing]. .

[0009] Furthermore, the outer end of the threaded rod is provided with a rotary encoder, and the positioning groove also includes a first inspection position A and an overhaul position C. The rotary encoder is configured to: feed back the opening degree of the soundproof cover to the programmable logic controller according to the position of the positioning block and the positioning groove. The programmable logic controller switches the start-stop modes of the two centrifugal pumps and the single-machine / cooperative mode of the constant pressure equipment according to the opening degree.

[0010] Furthermore, the centrifugal pump input end is connected to an inlet pipe, the centrifugal pump output end is connected to a delivery pipe, and the delivery pipe is connected to an outlet pipe. Differential pressure transmitters are installed upstream and downstream of the constant pressure equipment delivery pipe on the outlet pipe. The differential pressure transmitters are electrically connected to the programmable logic controller (PLC). The differential pressure transmitters are configured to cause the PLC to predict the water load using a sliding average based on the water load curve of the previous 30 minutes, and to start the constant pressure equipment 30-60 seconds in advance, maintaining the pressure inside the capsule-type pressure tank at a certain level. .

[0011] Furthermore, the output end of the constant pressure device is connected to a one-way valve, the output end of the one-way valve is connected to a pressure tank, and the output end of the pressure tank is connected to a pressure relief solenoid valve.

[0012] Furthermore, the soundproof cover consists of a damping sound-absorbing layer and a sound-insulating steel plate layer from the inside out.

[0013] Furthermore, the housing is connected to two slide rods, which are symmetrically arranged on both sides of the threaded rod. Each threaded slide has a slider at both ends, and the sliders on both sides are slidably connected to the two slide rods respectively.

[0014] On the one hand, an integrated water supply pressurization, stabilization, and noise reduction control method is provided, applied to an integrated water supply pressurization, stabilization, and noise reduction device as described in any of the above claims, comprising the following steps: S1 detects whether the positioning block is stuck in the positioning groove through the position feedback switch on the telescopic rod, and outputs the soundproof cover locking signal to the programmable logic controller; S2 The programmable logic controller sets the maximum air injection pressure limit of the constant pressure device according to the soundproof cover locking signal: the upper limit is when the positioning block is engaged in the positioning groove. The upper limit when the positioning block disengages from the positioning slot is ; S3 reads the rotation angle of the turntable through the rotary encoder and determines the opening degree of the soundproof cover based on the position of the positioning block inserted into the positioning groove: Fully closed operating position: Both centrifugal pumps are in hot standby mode, and the upstream and downstream differential pressure transmitters obtain... At that time, the two constant pressure devices work together to increase the pressure. Standalone operation; Single-sided semi-open maintenance position: The centrifugal pump on the corresponding side is unloaded and stopped, the outlet check valve is locked, and a single unit on the other side is subjected to constant pressure. Low-pressure operation; Double-sided fully open overhaul position: both pumps are completely stopped, and the constant pressure equipment is switched to pressure-maintaining standby mode; The programmable logic controller (PLC) in S4 continuously samples the pressure of the outlet pipe from the differential pressure transmitter. By overlaying the water load curve of the previous 30 minutes into a moving average, the pressure drop trend in the next 5 minutes is predicted. If the predicted drop is greater than... Then, start the air pump 30-60 seconds in advance to inject air into the capsule-type pressure tank, so that... , and according to Dynamic tracking.

[0015] Furthermore, the programmable logic controller predicts in step S4 that the pressure will rise back to [a certain level]. Turn off the air pump and open the pressure relief solenoid valve to balance the air pressure in the tank.

[0016] Furthermore, the moving average described in step S4 uses a weighted sliding window with a window width of 30 min. Sampling points closer to the current time have greater weights, and the weighting function is an exponential function. .

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. The opening and closing of the soundproof enclosure is upgraded from a simple maintenance operation to an integral work chain node deeply bound to the pressure stabilization safety interlock and pump group operation mode. This creates an adaptive operation closed loop between the soundproof enclosure, centrifugal pump, regulating mechanism, constant pressure equipment, differential pressure transmitter and programmable logic controller, effectively avoiding the safety risks caused by high-pressure gas injection when the enclosure is not closed. 2. Through real-time monitoring and linkage of dual independent constant pressure devices and pressure gauges, one or two constant pressure devices can work together to increase and stabilize the pressure according to the degree of insufficient water pressure in the outlet pipe, so as to realize the graded adjustment of water supply pressure, meet the continuous and stable water supply pressure requirements of high-rise buildings, and avoid insufficient water pressure or excessive fluctuations. 3. By using the weighted moving average prediction of differential pressure transmitter and preceding water load curve, the pressure stabilization method is changed from "replenishing after the drop" to "replenishing before the drop" with proactive prediction. The air pump is started 30-60 seconds in advance, so that the pressure fluctuation at the end of the high-rise water supply can be controlled within ±0.01MPa. 4. The soundproof enclosure adopts a double-layer composite structure with wedge-shaped sound-absorbing wedges, which effectively blocks the high-frequency noise generated by the centrifugal pump during operation and reduces pollution to the surrounding environment. With the cooperation of the threaded rod and threaded slide in the adjustment mechanism, as well as the guiding effect of the slide rod and slider, the opening and closing state of the soundproof enclosure can be flexibly adjusted. The centrifugal pump can be inspected without disassembling the structure, which greatly improves the convenience of maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an integrated water supply pressurization, stabilization, and noise reduction device without a programmable logic controller, provided in an embodiment of the present invention. Figure 2 This is a front view of the integrated water supply pressurization, stabilization, and noise reduction device without a programmable logic controller, as provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of an integrated water supply pressurization, stabilization, and noise reduction device with a pressure tank, provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of an integrated water supply pressurization and noise reduction device with a partial soundproof cover provided in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point Q; Figure 6This is a schematic diagram of the structure of an integrated water supply pressurization, stabilization, and noise reduction device with a partial housing provided in an embodiment of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point W; Figure 8 This is a schematic diagram of the internal structure of the soundproof cover in an integrated water supply pressurization and noise reduction device provided in an embodiment of the present invention; Figure 9 This is an enlarged structural schematic diagram of the turntable in an integrated water supply pressurization, stabilization, and noise reduction device provided in an embodiment of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: 1. Base; 2. Centrifugal pump; 21. Inlet pipe; 22. Delivery pipe; 23. Outlet pipe; 3. Soundproof enclosure; 31. Damping sound-absorbing layer; 32. Soundproof steel plate layer; 4. Constant pressure equipment; 41. Check valve; 42. Pressure tank; 43. Pressure relief solenoid valve; 5. Adjustment mechanism; 51. Housing; 52. Threaded rod; 53. Threaded slide; 54. Turntable; 541. Positioning groove; 55. Telescopic rod; 56. Positioning block; 57. Slide rod; 58. Slider; 6. Position feedback switch; 7. Programmable logic controller; 8. Rotary encoder; 9. Differential pressure transmitter. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0022] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0023] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0024] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0025] Example 1: like Figures 1 to 9 As shown, an integrated water supply pressurization, stabilization, and noise reduction device includes a base 1, two sets of centrifugal pumps 2 symmetrically arranged on the base 1, a soundproof cover 3 slidably connected to the base 1 and covering the centrifugal pumps 2, two sets of constant pressure devices 4 arranged on the base 1, and an adjustment mechanism 5. The adjustment mechanism 5 includes a housing 51 connected to the bottom of the base 1 and a threaded rod 52 rotatably connected to the housing 51. Threaded slides 53 are threaded to both ends of the threaded rod 52. The two threaded slides 53 are respectively connected to the two soundproof covers 3. A turntable 54 is connected to the threaded rod 52. The turntable 54 is located outside the housing 51. A telescopic rod 55 is connected to the outside of the housing 51. A positioning block 56 is connected to the telescopic rod 55. The positioning block 56 is engaged with the turntable 54 in the locked position. A pneumatic pump is installed inside the constant pressure device 4 to pump out gas. The telescopic rod 55 is equipped with a position feedback switch 6, which is electrically connected to a programmable logic controller 7. The programmable logic controller 7 is electrically connected to the frequency converters of the two sets of constant pressure devices 4 and the two centrifugal pumps 2.

[0026] In the above embodiment, the position feedback switch 6 is configured as follows: When the positioning block 56 engages with the positioning slot 541, the programmable logic controller 7 allows the constant pressure device 4 to operate at the designed outlet pressure. run; Among them, design export pressure The formula is: ; in: The density of water; It is the acceleration due to gravity; The required head for high-rise buildings; This refers to the head loss along the pipeline. This is the minimum pressure required at the point of water use. When the positioning block 56 disengages from the positioning groove 541, the programmable logic controller 7 limits the maximum air injection pressure of the constant pressure device 4 to [value missing]. This is to avoid the risk of resonance noise and accidental contact caused by high-pressure airflow in the unsealed state of the tank.

[0027] In the above embodiment, the outer end of the threaded rod 52 is provided with a rotary encoder 8, and the positioning groove 541 further includes a first inspection position A and a major overhaul position C. The rotary encoder 8 is configured to: feed back the opening degree of the soundproof cover 3 to the programmable logic controller 7 according to the position of the positioning block 56 and the positioning groove 541; the programmable logic controller 7 switches the start-stop modes of the two centrifugal pumps 2 and the single-machine / cooperative mode of the constant pressure device 4 according to the opening degree; preferably, the pump group and constant pressure mode are switched in three levels.

[0028] In some embodiments, the centrifugal pump 2 has an inlet pipe 21 connected to its input end and a delivery pipe 22 connected to its output end. An outlet pipe 23 is connected to the delivery pipe 22. Differential pressure transmitters 9 are installed upstream and downstream of the delivery pipe 22 on the outlet pipe 23. The differential pressure transmitters 9 are electrically connected to the programmable logic controller 7. The differential pressure transmitters 9 are configured to cause the programmable logic controller 7 to make a moving average prediction based on the water load curve of the previous 30 minutes, and to start the constant pressure device 4 30-60 seconds in advance, maintaining the pressure inside the capsule pressure tank at a certain level. .

[0029] In some embodiments, the output end of the constant pressure device 4 is connected to a one-way valve 41, the output end of the one-way valve 41 is connected to a pressure tank 42, and the output end of the pressure tank 42 is connected to a pressure relief solenoid valve 43.

[0030] In some embodiments, the soundproof cover 3 consists of a damping sound-absorbing layer 31 and a sound-insulating steel plate layer 32 from the inside out.

[0031] In this embodiment, the soundproof cover 3 consists of a damping sound-absorbing layer 31 and a sound-insulating steel plate layer 32 from the inside to the outside. The inner wall of the soundproof cover 3 is provided with a wedge-shaped sound-absorbing wedge at the incident angle of high-frequency noise.

[0032] In some embodiments, the housing 51 is connected to two slide rods 57, which are symmetrically arranged on both sides of the threaded rod 52. Each threaded slide 53 has a slider 58 connected to both ends, and the sliders 58 on both sides are slidably connected to the two slide rods 57 respectively.

[0033] In some embodiments, the turntable 54 is provided with a main running groove (default soundproof cover closed position), maintenance position A and overhaul position C in sequence along the circumferential direction on its outer periphery; taking the position of the turntable 54 when the soundproof cover 3 is fully closed as the zero-degree reference, when the positioning block 56 rotates 60° clockwise or counterclockwise with the turntable 54 and is engaged in maintenance position A, the threaded rod 52 drives the two soundproof covers 3 to slide in opposite directions, so that the centrifugal pump 2 on one side radially retracts to make room for maintenance; when the positioning block 56 rotates 180° and is engaged in overhaul position C, the two soundproof covers 3 retract to the extreme positions at both ends of the threaded rod 52, realizing full opening on both sides.

[0034] In the above embodiments, when the soundproof cover 3 is in a fully closed state, the absolute zero position of the turntable 54 serves as the physical reference for all angle calculations. When the positioning block 56 engages with the "maintenance position A" on the outer periphery of the turntable 54, the threaded rod 52 drives the soundproof cover 3 to retract a certain distance to both sides, so that the centrifugal pump 2 on one side is completely exposed to the external space to meet the daily maintenance or fault repair needs of a single device. The preferred angle is 60°. When the positioning block 56 engages with the "overhaul position C" on the outer periphery of the turntable 54, the soundproof cover 3 at both ends of the threaded rod 52 slides to the end of the mechanical stroke, and the two covers completely retract from the installation area of ​​the centrifugal pump 2. The preferred angle is 180°.

[0035] On the one hand, an integrated water supply pressurization, stabilization, and noise reduction control method is provided, applied to an integrated water supply pressurization, stabilization, and noise reduction device as described in any of the above claims, comprising the following steps: S1 detects whether the positioning block 56 is stuck in the positioning groove 541 by the position feedback switch 6 on the telescopic rod 55, and outputs the soundproof cover 3 locking signal to the programmable logic controller 7. The programmable logic controller 7 (S2) sets the maximum air injection pressure limit of the constant pressure device 4 according to the locking signal of the soundproof cover 3: the upper limit is when the positioning block 56 is engaged in the positioning groove 541. When the positioning block 56 disengages from the positioning groove 541, the upper limit is ; S3 reads the rotation angle of the turntable 54 through the rotary encoder 8, and determines the opening degree of the soundproof cover according to the position of the positioning block 56 inserted into the positioning groove 541: Fully closed operating position: Both centrifugal pumps 2 are in hot standby, and the upstream and downstream differential pressure transmitters 9 obtain... At that time, the two constant pressure devices 4 work together to increase the pressure. Standalone operation; Single-sided semi-open maintenance position: The centrifugal pump on the corresponding side is unloaded and stopped, the outlet check valve is locked, and a single unit on the other side is subjected to constant pressure. Low-pressure operation; Double-sided fully open overhaul position: both pumps are completely stopped, and the constant pressure equipment is in 4-way pressure-maintaining standby mode; The programmable logic controller 7 (S4) continuously samples the pressure of the outlet pipe 23 according to the differential pressure transmitter 9. By overlaying the water load curve of the previous 30 minutes into a moving average, the pressure drop trend in the next 5 minutes is predicted. If the predicted drop is greater than... Then, start the air pump 30-60 seconds in advance to inject air into the capsule-type pressure tank, so that... , and according to Dynamic tracking.

[0036] In some embodiments, the programmable logic controller 7 predicts the pressure will rise to [a certain level] in step S4. Turn off the air pump and open the pressure relief solenoid valve to balance the air pressure in the tank.

[0037] In some embodiments, the moving average in step S4 uses a weighted sliding window with a window width of 30 min. Sampling points closer to the current time have greater weights, and the weighting function is an exponential function. .

[0038] In this embodiment, the weighting function is an exponential function. The formula is: , ; in: The current moment; The sampling time is within the window.

[0039] Example 2: An embodiment of the present invention provides an integrated water supply pressurization, stabilization, and noise reduction device, comprising a base 1, two sets of centrifugal pumps 2 symmetrically arranged on the upper end of the base 1, a soundproof cover 3 slidably connected to the upper surface of the base 1, an inlet pipe 21 and a delivery pipe 22 connected to the output end of the centrifugal pumps 2, an outlet pipe 23 connected to the end of the delivery pipe 22, a constant pressure device 4 arranged on the upper end of the base 1, two sets of constant pressure devices 4, a conveying pipe connected between the bottom of the constant pressure device 4 and the outlet pipe 23, and a valve arranged outside the conveying pipe; an adjusting mechanism 5 is used to adjust the position of the soundproof cover 3, and the adjusting mechanism 5 is connected to the soundproof cover 3.

[0040] The constant pressure device 4, valves, and centrifugal pump 2 are all existing equipment and will not be described in detail here. The soundproof enclosure 3 is installed outside the centrifugal pump 2 to block the noise generated by the centrifugal pump 2 during operation from polluting the environment. The constant pressure device 4 is used to boost and stabilize the pressure when the pressure decreases during water delivery by the centrifugal pump 2, facilitating water supply to high-rise buildings. The two constant pressure devices 4 operate independently. A set of differential pressure transmitters 9 is installed on the outlet pipe 23, one upstream and one downstream of the delivery pipe, for real-time monitoring of pipeline pressure drop. When the pressure difference... At that time, two constant pressure devices work together to increase the pressure; when At that time, a single machine can meet the requirements.

[0041] The adjustment mechanism 5 includes a housing 51 mounted on the bottom of the base 1. Two sliding rods 57 are fixedly connected inside the housing 51, and a slider 58 is slidably connected to the outside of the sliding rods 57. The upper end of the slider 58 is fixedly connected to the bottom of the soundproof cover 3. A threaded rod 52 is rotatably connected to the inner wall of the housing 51, and two threaded carriages 53 are threadedly connected to the outside of the threaded rod 52. A connecting rod is fixedly connected between the side wall of the threaded carriage 53 and the side wall of the slider 58. A turntable 54 is provided at the end of the threaded rod 52, and multiple positioning slots 541 are spaced apart on the outside of the turntable 54, including a running position, a first maintenance position A, and a major overhaul position C. A telescopic rod 55 is provided on the outside of the housing 51, and a positioning block 56 is fixedly connected to the output end of the telescopic rod 55. The outside of the positioning block 56 is adapted to the inner wall of the positioning slot 541. The external threads of the threaded rod 52 are symmetrically arranged, allowing the two threaded carriages 53 to move closer or further apart.

[0042] The telescopic rod 55 is equipped with a position feedback switch 6. The signal indicating whether the positioning block 56 is engaged in the positioning groove 541 is sent to the programmable logic controller 7. The programmable logic controller 7 is also electrically connected to the frequency converters of the two centrifugal pumps 2, the air pumps in the two sets of constant pressure equipment 4, and the valves of the delivery pipes. Thus, the positioning block 56 not only serves as a mechanical limiter to restrict the sliding displacement of the cover, but is also deeply coupled with the pressure stabilizing safety chain: when the positioning block 56 is engaged in the positioning groove 541 and the soundproof cover 3 is fully closed, the programmable logic controller 7 allows the air pumps to operate at the designed outlet pressure. Operation; when the positioning block 56 disengages from the positioning slot 541, i.e., when the cover is half-open or fully open, the programmable logic controller 7 automatically limits the maximum air injection pressure of the air pump to [value missing]. This is to avoid the risk of resonance noise and accidental contact caused by high-pressure airflow in the unsealed state of the tank.

[0043] More importantly, a rotary encoder 8 is provided at the outer end of the threaded rod 52. The rotary encoder 8 feeds back the opening degree of the soundproof cover 3 to the programmable logic controller 7 based on the slot position of the positioning block 56. The programmable logic controller 7 then switches the start / stop modes of the two centrifugal pumps 2 and the single / cooperative mode of the constant pressure device 4 accordingly: in the fully closed operation position, the two pumps are in hot standby mode, and the differential pressure transmitter 9 obtains... Dual constant pressure equipment with 4-stage coordinated pressurization. When operating as a single unit; when one side is in the half-open maintenance position, the centrifugal pump on the corresponding side is unloaded and stopped, the outlet check valve is locked, and the other side is operated with a single unit under constant pressure. Low pressure operation is used to ensure safe operation of the pump body by maintenance personnel; both pumps are stopped when both sides are fully open for overhaul, and the constant pressure equipment is switched to pressure-maintaining standby mode.

[0044] The air pump inside the constant pressure device 4 does not directly inject water into the outlet pipe 23, but instead injects air into the bladder-type air tank 42 via a one-way valve 41. The air tank 42 and the outlet pipe 23 are isolated by the one-way valve 41 and the pressure relief solenoid valve 43. The programmable logic controller 7 predicts the water load using a sliding average based on the water load curve of the differential pressure transmitter 9 30 minutes in advance, and starts the air pump 30-60 seconds in advance. , ; And based on Dynamically track pressure change trends to achieve proactive pressure stabilization. When a pressure rebound is predicted... When necessary, turn off the air pressure pump and open the pressure relief solenoid valve 43 to balance the air pressure inside the tank.

[0045] The soundproof enclosure 3 has a double-layer composite structure, with an inner damping and sound-absorbing layer 31 and an outer sound-insulating steel plate layer 32. The inner wall of the enclosure is provided with wedge-shaped sound-absorbing wedges at the incident angle of high-frequency noise to further improve the high-frequency noise attenuation effect. Support legs 5 are fixedly connected to the four corners of the lower end of the base 1 to provide stable support for the entire device.

[0046] The implementation steps of this plan are as follows: First, install the centrifugal pump 2 on the base 1, and install the soundproof cover 3 on the outside of the centrifugal pump 2. Connect the outlet pipe 23 to the delivery pipe and the output end of the centrifugal pump 2. When using the centrifugal pump 2 to transport water, if the pressure gauge or differential pressure transmitter 9 outside the outlet pipe 23 shows insufficient water pressure, open the valve on the delivery pipe and use the air pressure pump in the constant pressure device 4 to inject air into the capsule-type air pressure tank 42. The air pressure pump works to inject gas into the water flow or increase the pressure in the pipeline, thereby further increasing the water pressure.

[0047] The rotary encoder 8 reads the rotation angle of the turntable 54, and the programmable logic controller 7 automatically determines the opening of the soundproof enclosure and switches the operating mode according to the position of the positioning block 56 inserted into the positioning slot 541, without manual intervention. The differential pressure transmitter 9 uses the weighted moving average of the water load curve from the previous 30 minutes to predict the pressure drop trend in the next 5 minutes. The air pump is started 30-60 seconds before the actual pressure drop to pre-replenish air, keeping the pressure fluctuation at the high-rise water supply terminal within ±0.01MPa, meeting the stable water supply needs of high-rise buildings.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated water supply pressurization, stabilization, and noise reduction device, characterized in that, The device includes a base (1), two centrifugal pumps (2) symmetrically arranged on the base (1), a soundproof cover (3) slidably connected to the base (1) and covering the centrifugal pumps (2), two constant pressure devices (4) arranged on the base (1) and an adjustment mechanism (5). The adjustment mechanism (5) includes a housing (51) connected to the bottom of the base (1) and a threaded rod (52) rotatably connected to the housing (51). Both ends of the threaded rod (52) are threadedly connected to threaded slides (53). The two threaded slides (53) are respectively connected to the two soundproof covers (3). A turntable (54) is connected to the threaded rod (52). The turntable (54) is located outside the housing (51). A telescopic rod (55) is connected to the outside of the housing (51). A positioning block (56) is connected to the telescopic rod (55). The positioning block (56) is engaged with the turntable (54) in the locked position. The telescopic rod (55) is equipped with a position feedback switch (6), which is electrically connected to a programmable logic controller (7). The programmable logic controller (7) is electrically connected to the frequency converters of the two sets of constant pressure devices (4) and the two centrifugal pumps (2).

2. The integrated water supply pressurization, stabilization, and noise reduction device according to claim 1, characterized in that, The position feedback switch (6) is configured as follows: When the positioning block (56) engages with the positioning slot (541), the programmable logic controller (7) allows the constant pressure device (4) to operate at the designed outlet pressure. run; When the positioning block (56) disengages from the positioning slot (541), the programmable logic controller (7) limits the maximum air injection pressure of the constant pressure device (4) to [value missing]. .

3. The integrated water supply pressurization, stabilization, and noise reduction device according to claim 1, characterized in that, The outer end of the threaded rod (52) is provided with a rotary encoder (8), and the positioning groove (541) also includes an inspection position (A) and an overhaul position (C). The rotary encoder (8) is configured to: feed back the opening degree of the soundproof cover (3) to the programmable logic controller (7) according to the position of the positioning block (56) and the positioning groove (541). The programmable logic controller (7) switches the start-stop modes of the two centrifugal pumps (2) and the single-machine / cooperative mode of the constant pressure device (4) according to the opening degree.

4. The integrated water supply pressurization, stabilization, and noise reduction device according to claim 1, characterized in that, The centrifugal pump (2) has an inlet pipe (21) connected to its input end and a delivery pipe (22) connected to its output end. A delivery pipe (23) is connected to the delivery pipe (22). Differential pressure transmitters (9) are installed upstream and downstream of the delivery pipe (22) on the delivery pipe (23). The differential pressure transmitters (9) are electrically connected to the programmable logic controller (7). The differential pressure transmitters (9) are configured to: enable the programmable logic controller (7) to predict the water load using a sliding average based on the water load curve of the previous 30 minutes, and to start the constant pressure device (4) 30-60 seconds in advance, maintaining the pressure inside the capsule pressure tank at a certain level. .

5. The integrated water supply pressurization, stabilization, and noise reduction device according to claim 4, characterized in that, The constant pressure device (4) is connected to a one-way valve (41) at its output end, and a pressure tank (42) is connected to the output end of the one-way valve (41). A pressure relief solenoid valve (43) is connected to the output end of the pressure tank (42).

6. The integrated water supply pressurization, stabilization, and noise reduction device according to claim 1, characterized in that, The soundproof cover (3) consists of a damping sound-absorbing layer (31) and a sound-insulating steel plate layer (32) from the inside to the outside.

7. The integrated water supply pressurization, stabilization, and noise reduction device according to claim 1, characterized in that, The housing (51) is connected to two slide rods (57). The two slide rods (57) are symmetrically arranged on both sides of the threaded rod (52). Each threaded slide (53) has a slider (58) connected to both ends. The sliders (58) on both sides are slidably connected to the two slide rods (57) respectively.

8. An integrated water supply pressurization, stabilization, and noise reduction control method, applied to the integrated water supply pressurization, stabilization, and noise reduction device described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1 detects whether the positioning block (56) is stuck in the positioning groove (541) by the position feedback switch (6) on the telescopic rod (55), and outputs the soundproof cover (3) locking signal to the programmable logic controller (7). The programmable logic controller (7) of S2 sets the maximum air injection pressure limit of the constant pressure device (4) according to the locking signal of the soundproof cover (3): the upper limit is when the positioning block (56) is inserted into the positioning groove (541). When the positioning block (56) disengages from the positioning groove (541), the upper limit is ; S3 reads the rotation angle of the turntable (54) through the rotary encoder (8) and determines the opening degree of the soundproof cover according to the position of the positioning block (56) inserted into the positioning groove (541): Fully closed operating position: both centrifugal pumps (2) are in hot standby, and the upstream and downstream differential pressure transmitters (9) obtain... At that time, the two constant pressure devices (4) work together to increase the pressure. Standalone operation; Single-sided semi-open maintenance position: The centrifugal pump on the corresponding side is unloaded and stopped, the outlet check valve is locked, and a single unit on the other side is subjected to constant pressure. Low-pressure operation; Double-sided fully open overhaul position: both pumps are stopped, and the constant pressure equipment (4) is switched to pressure-maintaining standby; The programmable logic controller (7) of S4 continuously samples the pressure of the outlet pipe (23) according to the differential pressure transmitter (9). By overlaying the water load curve of the previous 30 minutes into a moving average, the pressure drop trend in the next 5 minutes is predicted. If the predicted drop is greater than... Then, start the air pump 30-60 seconds in advance to inject air into the capsule-type pressure tank, so that... , and according to Dynamic tracking.

9. The integrated water supply pressurization, stabilization, and noise reduction control method according to claim 8, characterized in that, The programmable logic controller (7) predicts the pressure will rise to [a certain level] in step S4. Turn off the air pump and open the pressure relief solenoid valve to balance the air pressure in the tank.

10. The integrated water supply pressurization, stabilization, and noise reduction control method according to claim 8, characterized in that, The moving average described in step S4 uses a weighted moving window with a window width of 30 min. Sampling points closer to the current time have greater weights, and the weighting function is an exponential function. .

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