Optimized water supply system

Abstract

The utility model discloses an optimized water supply system, relates to the technical field of water supply optimization, and aims to solve the problem that the output pressure of an existing common pressure reducing valve does not change along with the output flow. An optimized water supply system comprises a main valve of a pressure reducing valve and a pilot valve, a pressure sensor and a flow sensor are arranged on an output pipeline of the main valve of the pressure reducing valve, a remote pressure sensor is further arranged on the most disadvantageous water distribution point, and a flow adjusting valve is arranged on an input pipeline of the main valve of the pressure reducing valve. The pressure sensor and the flow sensor are electrically connected with the controller; the pilot valve comprises a servo motor; and the controller is electrically connected with the servo motor. According to the optimized water supply system, the output pressure of a common pressure reducing valve can be changed along with the output flow, the output pressure is low when the flow is small, the situation that a pipeline system bears high pressure all the time regardless of the flow is avoided, and therefore the water leakage rate and the pipe explosion rate are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water supply optimization, in particular to an optimized water supply system. Background Art

[0002] The water pressure in the main water pipe is much higher than the actual water pressure required by the user. Therefore, when supplying water to users in a certain area, a pressure reducing valve must be used to reduce the high pressure before the valve. The water pressure after the pressure reduction must ensure that the most unfavorable water distribution point (generally the highest or farthest user) has appropriate water pressure to ensure that each water fixture has the required water consumption. Since the flow rate of water in the pipeline is high during peak water consumption, the flow resistance is large and the required water pressure is high. Conversely, the required water pressure is low during low water consumption. Because the flow rate fluctuates greatly within a day, the water supply pressure varies greatly. The water pressure during peak water consumption is often the highest water pressure in a day. The output pressure of an ordinary pressure reducing valve is set according to the highest water pressure within a day or a period of time, and the output pressure remains unchanged regardless of the peak or low water consumption. In this way, during low water consumption, such as early morning or late at night, the entire pipeline system is subjected to this high pressure, which increases the leakage and burst rate of the pipeline system, especially the low-level pipelines and valves. The higher the water pressure, the greater the leakage and the higher the probability of bursting. Utility Model Content

[0003] The utility model solves the problem that the output pressure of the existing common pressure reducing valve does not change with the output flow rate, and proposes an optimized water supply system, which can make the output pressure of the common pressure reducing valve change with the output flow rate. When the flow rate is small, the output pressure is low, which avoids the pipeline system always being subjected to high pressure regardless of the flow rate, thereby reducing the leakage and pipe burst rate.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes a main valve and a pilot valve of a pressure reducing valve, a pressure sensor and a flow sensor are arranged on the output pipeline of the main valve of the pressure reducing valve, a flow regulating valve is arranged on the input pipeline of the main valve of the pressure reducing valve, and the pressure sensor and the flow sensor are both electrically connected to a controller; the pilot valve includes a servo motor; the controller is electrically connected to the servo motor, and the controller also inputs the relationship data of "flow-output pressure" and the water pressure range data of the most unfavorable water supply point.

[0005] The technical solution mainly includes a main valve, a pilot valve, a flow regulating valve, a pressure sensor, a flow sensor and a controller of a pressure reducing valve. The pressure sensor and the flow sensor can send the collected corresponding signals to the controller, and the controller can control the operation of the servo motor to adjust the output pressure.

[0006] The servo motor is installed on the top of the upper valve cover, and the pilot valve includes a reducer connected to the servo motor. A ball nut is screwed on the output screw of the reducer, and two tightening nuts are screwed on the lower end of the output screw. The tightening nuts can limit the downward movement distance of the ball nut, and the upward movement distance of the ball nut is limited by the end of the reducer.

[0007] The pilot valve also includes a positioning screw. The outer sleeve surface of the ball nut is provided with a longitudinal groove a. The pin at the top of the positioning screw is movably matched with the longitudinal groove a.

[0008] In the present technical solution, since the longitudinal groove a and the matching positioning screw are provided on the outer sleeve surface of the ball nut, when the output screw rod rotates, the ball nut can only move up and down but cannot rotate.

[0009] A diaphragm is arranged between the upper valve cover and the end surface of the lower valve body of the pilot valve, and the outer edge of the diaphragm is pressed between the upper valve cover and the end surface of the lower valve body of the pilot valve by a plurality of screws.

[0010] A pressure regulating spring is arranged between the gasket above the diaphragm and the shoulder end surface of the ball nut.

[0011] In the technical solution, under the drive of the servo motor, the pressure of the pressure-adjusting spring on the diaphragm can be increased or decreased.

[0012] The pressure sensor and the flow sensor are both connected to the controller via wires, and the controller is connected to the servo motor via wires.

[0013] The pressure reducing valve supplies water to a plurality of water distribution points, and a remote pressure sensor is arranged at the most unfavorable water distribution point among the plurality of water distribution points, and the remote pressure sensor is electrically connected to the controller.

[0014] In this technical solution, by collecting the pressure at the most unfavorable water distribution point, it is ensured that the water pressure at the most unfavorable water distribution point is within a set range.

[0015] The utility model can bring the following beneficial effects:

[0016] The utility model relates to an optimized water supply system, which can make the output pressure of an ordinary pressure reducing valve vary with the output flow rate. When the flow rate is small, the output pressure is low, thereby avoiding the pipeline system always being subjected to high pressure regardless of the flow rate, thereby reducing the leakage and pipe burst rate; the technical solution of the utility model is applicable to various types of pressure reducing valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a pressure reducing valve in the prior art;

[0018] Figure 2It is a schematic diagram of the overall structural connection of an optimized water supply system of the utility model;

[0019] Figure 3 It is a structural schematic diagram of an optimized pilot valve of a water supply system of the utility model;

[0020] in,

[0021] 1. Main valve, 2. Valve core, 3. Needle valve, 4. Control chamber, 5. Pilot valve of prior art, 6. Stop valve, 7. Pilot valve, 8. Flow control valve, 9. Pressure sensor, 10. Flow sensor, 11. Controller, 12. Remote pressure sensor, 13. Servo motor, 14. Reducer, 15. Ball nut, 16. Pressure regulating spring, 17. Outlet screw, 18. Tightening nut, 19. Diaphragm, 21. Positioning screw, 22. Upper valve cover, 23. Sliding valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described here is only an embodiment of the utility model, which is only used to explain the utility model and does not limit the protection scope of the utility model. All other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the utility model.

[0023] refer to Figure 1 It is a 200X type pressure reducing valve commonly used in the art, including a main valve 1, a valve core 2, a needle valve 3, a control chamber 4, a pilot valve 5 of the prior art, a stop valve 6 and a number of connecting pipes. Its detailed structure and working principle are prior art and will not be described in detail here.

[0024] The output pressure of the above-mentioned pressure reducing valve is set according to the highest water pressure in a day or a period of time, and the output pressure remains unchanged regardless of the peak or trough of water usage. In this way, when the water usage is low, such as in the early morning or late at night, the entire pipeline system is subjected to this high pressure, which increases the leakage and burst rate of the pipeline system, especially the low-level pipelines and valves. The higher the water pressure, the greater the leakage and the higher the chance of bursting.

[0025] because Figure 1 The output pressure of the pressure reducing valve structure is constant, and this embodiment is improved and optimized on the basis of the pressure reducing valve structure to achieve the purpose of the utility model.

[0026] This embodiment proposes an optimized water supply system, and its overall schematic diagram can be referred to Figure 2, including a main valve 1 of a pressure reducing valve, a pilot valve 7, a flow regulating valve 8, a pressure sensor 9, a flow sensor 10 and a controller 11. Different from the pilot valve 5 of the prior art, the pilot valve 7 here is a pilot valve with an improved structure, which will be described in more detail later. The controller 11 is a prior art, which can receive the signal of the sensor and adjust the pilot valve 7 according to the signal of the sensor, thereby adjusting the output pressure of the main valve 1 of the pressure reducing valve.

[0027] refer to Figure 2 A pressure sensor 9 and a flow sensor 10 are connected to the output pipeline of the main valve 1 of the pressure reducing valve in sequence, and a flow regulating valve 8 is connected to the input pipeline of the main valve 1 of the pressure reducing valve.

[0028] More specifically, the pressure sensor 9 and the flow sensor 10 are electrically connected to the controller 11 , and the controller 11 is also electrically connected to the servo motor 13 . The servo motor 13 is disposed on the top of the upper valve cover 22 .

[0029] refer to Figure 3 , is the structure of the pilot valve 7 in this embodiment, the structure of the lower half is the same as the pilot valve 5 in the prior art, and the main modification is made to the structure of the upper part.

[0030] In addition to the above-mentioned servo motor 13, the pilot valve 7 also includes a reducer 14, which is connected to the servo motor. Furthermore, the reducer 14 is provided with an output shaft screw 17, and the output shaft screw 17 can be screwed together with the ball nut 15; in addition, the lower end of the output shaft screw 17 is also screwed together with two tightening nuts 18.

[0031] In the embodiment of the above technical solution, a servo motor 13 with a reducer 14 is vertically installed on the top of the upper valve cover 22, the output shaft screw 17 of the reducer 14 is screwed with the ball nut 15, and a corresponding tightening nut 18 is provided at the lower end of the output shaft screw 17, and the tightening nut 18 can limit the downward movement distance of the ball nut 15, and the upward movement distance of the ball nut 15 is limited by the end of the reducer 14.

[0032] Furthermore, the pilot valve 7 also includes a positioning screw 21, the pin at the top of the positioning screw 21 can be inserted into the longitudinal groove a and movably matched with the longitudinal groove a, and the longitudinal groove a is arranged on the outer sleeve surface of the ball nut 15, and the longitudinal groove a is a through groove.

[0033] In the embodiment of the above technical solution, since the longitudinal groove a and the matching positioning screw 21 are provided on the outer sleeve surface of the ball nut 15, when the output shaft screw 17 rotates, the ball nut 15 can only move up and down but cannot rotate.

[0034] refer to Figure 3 The pilot valve 7 further comprises a diaphragm 19 , the outer edge of which is pressed between the upper valve cover 22 and the end surface of the lower valve body of the pilot valve 7 by a plurality of screws.

[0035] A corresponding pressure regulating spring 16 is arranged between the shoulder end surface of the ball nut 15 and the washer above the diaphragm 19 .

[0036] In the embodiment of the above technical solution, under the drive of the servo motor 13, the pressure of the pressure regulating spring 16 on the diaphragm 19 can be increased or decreased.

[0037] The center lines of the above-mentioned parts in the pilot valve 7 are all on the same vertical line as the center line of the slide valve 23 after assembly.

[0038] refer to Figure 2 As for the specific connection mode between the pressure sensor 9 and the flow sensor 10 and the controller 11, they are all connected through wires; as for the connection mode between the controller 11 and the servo motor 13, they are also connected through wires.

[0039] The output pipe of the main valve 1 of the pressure reducing valve can supply water to multiple water distribution points. Figure 2 , including water distribution points B1, B2, B3...Bn, among which there is the most unfavorable water distribution point Bn; the water supply system must ensure that the most unfavorable water distribution point has the necessary minimum water pressure at any time of water supply, so a remote pressure sensor 12 is set at the most unfavorable water distribution point Bn, and the remote pressure sensor 12 can be electrically connected to the controller 11 in a wired or wireless manner, and send the collected pressure signal to the controller 11. In this embodiment, the most unfavorable water distribution point is generally the highest or farthest user.

[0040] In the embodiment of the above technical solution, the water pressure at the most unfavorable water distribution point is collected to ensure that the water pressure at the most unfavorable water distribution point is within a set range.

[0041] refer to Figures 1 to 3 , the regulation principle of the water supply system of this embodiment is described in detail.

[0042] The "flow-output pressure" characteristics of a water supply system depend on many factors, such as season, length of pipes, number of water users, leakage and the location of the most unfavorable distribution point.

[0043] Therefore, before water supply, it is necessary to determine the relationship between "flow rate - output pressure" at each time period within 24 hours of each season in the water supply system. This data is usually determined by historical data or empirical data; if it cannot be determined, then it can only be determined by actual detection. During actual detection, for different flow rates, the servo motor 13 is adjusted to ensure that the output pressure reaches an appropriate water pressure at the most unfavorable water distribution point. It should be noted that the water pressure at the most unfavorable water distribution point should not be too high and should be the minimum water pressure to ensure the water consumption of each water appliance. Otherwise, the output pressure of the pressure reducing valve will be greatly increased.

[0044] The obtained "flow rate - output pressure" data is stored in the controller 11 as the basis for automatic adjustment. The "flow rate - output pressure" data curve can be simplified into two parallel lines with a distance of △P2 (△P2 is the allowable fluctuation range of the output pressure) and a certain upward slope, and then stored in the controller 11.

[0045] During the water supply process, the actual flow rate is periodically collected and detected by the flow sensor 10. If the flow rate Qn is detected at the Nth time point and compared with Qn-1 detected at the previous time point, and if Qn < Qn-1, then the controller 11 sends a signal to the servo motor 13 to reduce the pressure of the pressure regulating spring 16 on the diaphragm 19, and the opening of the valve port V2 of the pilot valve 7 becomes smaller. In this way, the amount of water discharged from the control chamber 4 of the main valve to the downstream decreases, the water pressure in the control chamber 4 increases, the spool 2 moves downward, and the opening of the main valve port V1 becomes smaller. Due to the throttling and pressure reduction effect, the output pressure P2 decreases to the set value.

[0046] If the flow rate Qn+1 detected at the (N + 1)th time point continues to decrease, that is, Qn+1 < Qn, then the pressure regulating spring 16 moves further in the same direction, and the output pressure P2 further decreases to the set value; if Qn+1 > Qn, then the servo motor rotates in reverse, the pressure of the pressure regulating spring 16 on the diaphragm increases, and the output pressure P2 increases to the set value.

[0047] In this way, through periodic flow rate detection, the flow rate value at each time point is compared with the previous flow rate value, so that the output pressure P2 is automatically adjusted according to the "flow rate - output pressure" requirements stored in the controller 11.

[0048] At the same time, the set output pressure is compared with the actual output pressure. If the actual output pressure deviates greatly from the set output pressure, the servo motor 13 can finely adjust the actual output pressure to bring it back within the set range.

[0049] The controller inputs the relationship data of "flow-output pressure" and the water pressure range data of the most unfavorable water supply point. In order to ensure the lowest water pressure of the most unfavorable water distribution point Bn, when the water pressure of the most unfavorable water distribution point Bn is outside the set range, the controller 11 adjusts the output pressure through the servo motor 13 according to the detection signal of the remote pressure sensor 12 to ensure that the water pressure of the most unfavorable water distribution point Bn returns to the set range. In addition, the controller 11 also includes a memory, which can record the "Q-P2-P BN "Values, namely the flow rate, output pressure and the pressure of the most unfavorable water distribution point Bn, provide data sources for precise regulation.

Claims

1. An optimized water supply system, characterized in that: The invention comprises a main valve (1) of a pressure reducing valve and a pilot valve (7); a pressure sensor (9) and a flow sensor (10) are arranged on the output pipeline of the main valve (1) of the pressure reducing valve; a flow regulating valve (8) is arranged on the input pipeline of the main valve (1) of the pressure reducing valve; the pressure sensor (9) and the flow sensor (10) are both electrically connected to a controller (11); the pilot valve (7) comprises a servo motor (13); the controller (11) is electrically connected to the servo motor (13); the controller (11) also inputs "flow-output pressure" relationship data and water pressure range data of the most unfavorable water supply point; the pressure reducing valve supplies water to a plurality of water distribution points; a remote pressure sensor (12) is arranged at the most unfavorable water distribution point among the plurality of water distribution points; the remote pressure sensor (12) is electrically connected to the controller (11).

2. An optimized water supply system according to claim 1, characterized in that: The servo motor (13) is mounted on the top of a valve cover (22) on the pilot valve (7). The pilot valve (7) comprises a reducer (14) connected to the servo motor (13). A ball nut (15) is screwed onto an output screw rod (17) of the reducer (14). Two tightening nuts (18) are screwed onto the lower end of the output screw rod (17).

3. An optimized water supply system according to claim 2, characterized in that: The pilot valve (7) further comprises a positioning screw (21), the outer sleeve surface of the ball nut (15) is provided with a longitudinal groove a, and a pin at the top end of the positioning screw (21) is movably matched with the longitudinal groove a.

4. An optimized water supply system according to claim 2 or 3, characterized in that: A diaphragm (19) is arranged between the upper valve cover (22) and the end surface of the lower valve body of the pilot valve (7), and the outer edge of the diaphragm (19) is pressed between the upper valve cover (22) and the end surface of the lower valve body of the pilot valve (7) by a plurality of screws.

5. An optimized water supply system according to claim 4, characterized in that: A pressure regulating spring (16) is arranged between the gasket above the diaphragm (19) and the shoulder end surface of the ball nut (15).

6. An optimized water supply system according to claim 1, 2 or 3, characterized in that: The pressure sensor (9) and the flow sensor (10) are both connected to a controller (11) via wires, and the controller (11) is connected to a servo motor (13) via wires.

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