CN201554067U - A hydraulic automatic control pipe network superimposed pressure water supply equipment - Google Patents

Abstract

The utility model discloses a hydraulic automatic control pipe network superimposed pressure water supply equipment, mainly comprising water inlet hydraulic water level control valves (4-1, 4-2), water level control devices (6), regulating water tanks (7), hydraulic switches Valve (10), pressure transmitter (18), electric control cabinet (20) and pressurized water pump (16). Described hydraulic switching valve (10) is mainly made of flange valve seat (10-1), flange tee (10-2), flange valve cover (10-3), soft rubber film (10-4) and The gravity gate (10-5) is formed; the water level control device (6) is formed by an open small water tank (6-1) and a siphon water level control pipe (6-2). The utility model is characterized in that: automatic hydraulic control is adopted, which overcomes the drawbacks of electrical automatic control, which is easy to be disturbed by human beings and has low safety and reliability; on the premise of ensuring the water safety of users, it is helpful to improve the adjustment ability of the pipe network and promote the balance of the pipe network Water supply: use normal pressure regulating water tank instead of pressure buffer tank or pressure buffer water tank, which greatly saves production cost.

Description

A hydraulic automatic control pipe network superimposed pressure water supply equipment

technical field

The utility model relates to a hydraulic automatic control pipe network superimposed pressure water supply equipment, in particular to a complete set of water supply equipment including a normal pressure regulating water tank, a pressurized water pump and an automatic control device, which is used for secondary pressurization of domestic and production water supply.

Background technique

Pipe network superimposed pressure water supply equipment, also known as non-negative pressure water supply equipment, has been gradually popularized and applied in municipal water supply pipe networks due to its advantages of superimposed pressure and energy saving. However, this type of equipment currently has the following technical deficiencies:

1. The flow rate of the pressurized water pump must meet the user's water consumption requirements at any time, which is much larger than the usual high-level water tank water supply method, which will inevitably aggravate the contradiction between supply and demand during the peak water consumption period of the pipe network, and endanger the safe water use of other surrounding users. Therefore, Such equipment is required, when the water supply pressure of the pipe network is lower than the set value, the valve on the suction pipe must be closed, and water cannot be directly drawn from the pipe network. At this time, because the adjusted water volume of the buffer water tank or buffer water tank supporting the equipment is too small, it will be used up within half an hour, and it is impossible to ensure the user's water safety. For users with uninterrupted water supply, such as hospitals, important institutions and buildings This type of equipment cannot be used in high-standard residential areas. The practice of adding atmospheric water storage tanks to achieve water safety makes the composition of the entire set of equipment complicated and repetitive, which greatly increases production costs.

2. The function of the buffer water tank or the buffer water tank is equivalent to that of the normal pressure regulating water tank, but it must be manufactured according to the conditions of pressure bearing, and the production cost is 5 to 10 times that of the normal pressure water tank, which is a waste of resources and is out of production Considering the cost, the buffer water tank or the buffer water tank adopts a relatively small capacity, which cannot ensure the user's water consumption requirements.

3. When the water supply pressure of the pipe network is lower than the predetermined value, a pressure sensor and an electric actuator must be used to close the valve on the water pump suction pipe. This electric control method has the disadvantages of high degree of human intervention and low safety and reliability. The drive may make the user indifferent to whether the control function can be performed normally, or even the valve cannot be closed due to human failure, and this kind of failure is usually not easy to be found.

4. When the pipe network implements a water supply mechanism that guarantees the minimum water supply pressure, the "no negative pressure" function does not have any promotion significance for the safe water supply of the pipe network, and becomes an unnecessary decoration, or even a hidden danger that endangers safe water supply.

5. The operation of such equipment will aggravate the contradiction between the supply and demand of the pipe network, it is impossible to promote the balanced water supply of the pipe network, and the best energy-saving effect cannot be achieved on the whole.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a hydraulic automatic control pipe network superimposed water supply equipment, which includes a complete set of hydraulic automatic control device, regulating water tank and pressurized water pump, used for daily life and The secondary pressurization of production water supply can ensure the water safety of users and alleviate the tension between supply and demand in the peak water consumption of the pipeline network, promote the balanced water supply of the pipeline network, and help to improve the economic efficiency of the pipeline network operation as a whole.

The technical scheme of the above-mentioned technical problem that the utility model solves is:

A hydraulic automatic control pipe network superimposed water supply equipment, including hydraulic water level control valves 4-1, 4-2, regulating water tank 7, pressurized water pump 16, water inlet main pipe 1 and water outlet pipe 17, the water inlet main pipe 1 Connect with one end of the water inlet pipe 2-1 of the water tank and one end of the connecting pipe 8 of the hydraulic switch valve 10 respectively; Throttle orifice 3-1, hydraulic water level control valve 4-1 and ball float valve 5-1 are set, and ball float valve 5-1 is placed in the open small water tank 6-1 of water level control device 6, and water level control device 6 has two The two are identical in structure except for the siphon water level control pipe 6-2; the open small water tank 6-1 is arranged on the upper part of the regulating water tank 7; the other end of the connecting pipe 8 of the hydraulic switching valve 10 is connected to the hydraulic switching valve The water inlet 10-14 of 10 is connected, and the water outlet 10-15 of the hydraulic switch valve 10 is connected with the connecting pipe 9 of the hydraulic switch valve 10, and the connecting pipe 9 is connected with the suction pipe 14 of the pressurized water pump 16, and the outlet of the pressurized water pump 16 is connected to the Water pipe 17; a U-shaped pipe is connected downward at the horizontal section of the connecting pipe 9 of the hydraulic switch valve 10, and the other end of the U-shaped pipe is connected with the water inlet pipe 2-2 of the water tank, and is arranged sequentially on the water inlet pipe 2-2 of the water tank according to the direction of water flow Throttle orifice 3-2, hydraulic water level control valve 4-2 and ball float valve 5-2, ball float valve 5-2 is placed in the small open water tank 6-1; The pressure pipe 11 communicates with the back pressure hole 10-10 on the hydraulic switching valve 10, and the back pressure pipe 11 is provided with a solenoid valve 12;

The above-mentioned hydraulic switching valve 10 is composed of flange valve seat 10-1, flange tee 10-2, flange valve cover 10-3, soft rubber membrane 10-4, gravity gate 10-5, bolt 10-6, sealing Gasket 10-7 and sealing ring 10-12 are composed, in the vertical order from bottom to top, flange valve seat 10-1, sealing ring 10-12, flange tee 10-2, soft rubber membrane 10-4 and the flange bonnet 10-3 are docked in pairs, the flange between the flange valve seat 10-1 and the flange tee 10-2, the method of the flange tee 10-2 and the flange bonnet 10-3 The flanges are tightly fixed with bolts, the water inlet 10-14 on the flange valve seat 10-1 faces downward, the water outlet 10-15 on the flange tee 10-2 is in the horizontal direction; the lower end surface of the gravity gate 10-5 Paste the gasket 10-7, and the upper end uses the bolt 10-6 to tightly fix the soft rubber membrane 10-4 and the gravity gate 10-5.

平。The above-mentioned water level control device 6 is composed of an open small water tank 6-1 and a siphon water level control pipe 6-2. The siphon water level control pipe 6-2 is composed of pipe sections with different inner diameters. Smaller U-shaped tubes, the radial cross-sectional shape of the U-shaped tubes is not limited to a circle, and the inner diameter is not greater than 20mm when a circle is used; there is a height difference between the two ends of the siphon water level control pipe 6-2, and the higher end extends into the open In the small water tank 6-1, the lower end stretches into the regulating water tank 7, the semicircular top of the U-shaped pipe is higher than the upper edge of the open small water tank 6-1, and the upper edge of the open small water tank 6-1 is elevated and adjust the water level of the water tank 7

flat.

The number of the above-mentioned siphon water level control pipes 6-2 is greater than 4 and not less than 2, and they are connected in parallel with each other, and are connected by a connecting piece 6-3, and the passage 6-4 in the connecting piece 6-3 makes the siphon water level control pipe 6 Two-to-two communication in -2.

The above-mentioned hydraulic on-off valve 10 can also be used in other fluid media besides the water fluid medium.

The above-mentioned water level control device 6 can also be used for other liquid fluid media besides the water fluid medium.

The main features of the utility model compared with the prior art are:

1. The utility model adopts the hydraulic automatic control mode instead of the electrical automatic control mode, and uses the interaction of water pressure and gravity to automatically control the opening and closing of the hydraulic switch valve. Human intervention is not allowed in the working state, and the structure is simple, safe and reliable.

2. The switch of the water inlet hydraulic water level control valve of the utility model uses the water level control device to control the water level with a large drop, so that the peak water consumption of the pipe network is staggered during the water inlet period of the water tank, and the adjustment capacity of the water tank is fully utilized to greatly improve the adjustment ability of the pipe network , and effectively reduce the number of switching operations, reduce the wear probability of valve parts, and play a role in prolonging the service life.

3. The utility model combines the energy-saving advantages of the superimposed water supply equipment of the pipe network with the improvement of the adjustment ability of the pipe network. It can alleviate the tension between supply and demand of the municipal water supply pipe network during the peak period of water supply while realizing uninterrupted water supply, and meet the water consumption of users. Under the premise of the requirements, promote the balanced water supply of the pipe network to achieve the overall best energy-saving benefits.

4. The utility model adopts the normal pressure regulating water tank to replace the pressure buffer tank or the pressure buffer water tank, which greatly saves the production cost compared with the same period of last year.

Explanatory drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the water level control device of the present invention.

Fig. 3 is a structural schematic diagram of the utility model adopting more than two siphon water level control pipes connected in parallel.

Fig. 4 is a structural schematic diagram of the hydraulic switching valve of the present invention in an open state.

Fig. 5 is a structural schematic diagram of the closed state of the hydraulic switching valve of the present invention.

Among Fig. 1: main water inlet pipe 1, water tank inlet pipe 2-1, 2-2, throttling orifice plate 3-1, 3-2, hydraulic water level control valve 4-1, 4-2, ball float valve 5-1, 5-2, water level control device 6, regulating water tank 7, hydraulic switching valve connecting pipes 8, 9, hydraulic switching valve 10, back pressure pipe 11, solenoid valve 12, pressure relief pipe 13, water pump suction pipe 14, check valve 15 , pressurized water pump 16, outlet pipe 17, pressure transmitter 18, electrical control circuit 19, electric control cabinet 20, water level elevation

Among Fig. 2 and Fig. 3: open small water tank 6-1, siphon water level control pipe 6-2, connecting piece 6-3, channel 6-4, water level elevation

In Figure 4 and Figure 5: flange valve seat 10-1, flange tee 10-2, flange valve cover 10-3, soft rubber membrane 10-4, gravity gate 10-5, bolt 10-6, seal Pad 10-7, positive pressure chamber 10-8, back pressure chamber 10-9, back pressure hole 10-10, pressure relief hole 10-11, sealing ring 10-12, sealing surface 10-13, water inlet 10-14 , outlet 10-15.

Detailed ways

The following drawings and an embodiment of the utility model further describe the utility model.

1. Equipment system composition

A hydraulic automatic control pipe network superimposed water supply equipment, which is used for secondary pressurization of domestic and production water supply in municipal water supply pipe networks.

As shown in Figures 1 to 5: the main water inlet pipe 1 is divided into two routes, one of which passes through the water tank inlet pipe 2-1, the regulating water tank 7, the water pump suction pipe 14, the pressurized water pump 16, and the water outlet pipe 17 to the user. A throttling orifice 3-1, a hydraulic water level control valve 4-1 and a ball float valve 5-1 are arranged in sequence according to the water flow direction on the water tank inlet pipe 2-1, and the ball float valve 5-1 is placed in the small open water tank 6-1. Used to control the switch of the hydraulic water level control valve 4-1; the other way is connected to the water pump suction pipe 14 through the hydraulic switch valve connecting pipe 8, the hydraulic switch valve 10, and the power switch valve connecting pipe 9, and then through the pressurized water pump 16, the outlet Water pipe 17 to user. The water pump suction pipe 14 is provided with a check valve 15, and a U-shaped pipe is connected downward from the force switch valve connecting pipe 9 horizontal section, and the other end of the U-shaped pipe is connected with the water tank inlet pipe 2-2, and the water tank inlet pipe 2-2 The throttle orifice 3-2, the hydraulic water level control valve 4-2 and the floating ball valve 5-2 are arranged sequentially according to the water flow direction. The floating ball valve 5-2 is placed in the small open water tank 6-1 to control the hydraulic water level control. Switching of valve 4-2. A back pressure pipe 11 is connected to the back pressure hole 10-10 on the hydraulic switch valve 10 from the connecting pipe 8 of the hydraulic switch valve, and the back pressure pipe 11 is provided with a solenoid valve 12 . Connect the pressure relief pipe 13 from the pressure relief hole 10-11 on the hydraulic switching valve 10 to communicate with the atmosphere.

2. Workflow

According to Fig. 1～Fig. 5 and above-mentioned, the working process of the present utility model is as follows:

1. When the water supply pressure of the pipe network is higher than the set value, the incoming water enters the hydraulic switch valve 10 through the water inlet main pipe 1 and the hydraulic switch valve connecting pipe 8, and the water pressure acts on the gravity gate 10-5. When the water pressure is greater than the gravity When the weight of the gate 10-5 is lifted, the gravity gate 10-5 is lifted, and the hydraulic switch valve 10 is opened, and the water passes through the water inlet 10-14, the positive pressure chamber 10-8, the water outlet 10-15, and the force switch valve. After the connecting pipe 9 and the water pump suction pipe 14 enter the pressurized water pump 16 for pressurization, they are sent to the user through the water outlet pipe 17 .

During the lifting process of the gravity gate 10-5, the space of the back pressure chamber 10-9 is compressed, and the internal air is released from the pressure relief hole 10-11 and discharged into the atmosphere through the pressure relief pipe 13.

液压水位控制阀4-1、4-2自动关闭时停止。水泵吸水管14上的止回阀15用于阻止水流进入调节水箱7，根据水位差的关系，此时管网供水水压远高于调节水箱7水面，迫使止回阀15处在关闭状态，调节水箱7的水不可能进入加压水泵16。When the equipment is running for the first time, the pipe network water is injected into the regulating water tank 7 through the water tank inlet pipes 2-1 and 2-2 at the same time until the water surface reaches the water level

Stop when hydraulic water level control valve 4-1, 4-2 closes automatically. The check valve 15 on the water pump suction pipe 14 is used to prevent water from entering the regulating water tank 7. According to the relationship of water level difference, the water supply pressure of the pipe network is much higher than the water level of the regulating water tank 7 at this time, forcing the check valve 15 to be in a closed state. It is impossible to adjust the water in the water tank 7 to enter the pressurized water pump 16 .

2. During the peak water consumption period of the pipe network, the water supply pressure is lower than the set value. Since the water pressure is lower than the gravity, the gravity gate 10-5 of the hydraulic switch valve 10 falls back down, and the sealing gasket 10-7 on the end face and the flange valve seat 10 The sealing surfaces 10-13 on -1 are closed, the hydraulic switch valve 10 is closed, water cannot flow through and enter the pressurized water pump 16, and the pressurized water pump 16 then transfers to draw water from the regulating water tank 7, and the check valve 15 is adjusting Water tank 7 water surface and pressurized water pump 16 suction force are opened under the pressure difference effect that forms. The gravity gate 10-5 increases the space of the back pressure chamber 10-9 to generate negative pressure during the falling process. Under the action of the pressure difference, the atmosphere flows back into the back pressure chamber 10 from the pressure relief hole 10-11 through the pressure relief pipe 13. -9 within. Use the pressure relief pipe 13 to control the return flow of the atmosphere, so that the pressure in the back pressure chamber 10-9 can be gently changed to act as a delay buffer, thereby avoiding the water hammer impact in the water pipe caused by the too fast closing action of the gravity gate 10-5, and at the same time avoiding The impact damages the valve parts due to the excessive descending speed. Connect the U-shaped pipe downwards from the hydraulic switching valve connecting pipe 9 horizontal sections and then connect with the water tank inlet pipe 2-2, and utilize the water sealing effect of the U-shaped pipe to stop air from entering the pressurized water pump 16 through this.

The weight of the gravity gate 10-5 is related to the set value of the water supply pressure of the pipe network, and is directly proportional to the level of the set value.

3. Regulating water tank 7

时，水位控制装置6上的虹吸水位控制管6-2内开始形成虹吸放水，开式小水箱6-1内的水被抽排至调节水箱7，直至开式小水箱6-1内的水面下降到水位

空气从虹吸水位控制管6-2端口进入破坏虹吸为止，此时浮球阀5-2回落，液压水位控制阀4-2被打开但处在无水可进的状态；调节水箱7的水面继续下降到水位

时，液压水位控制阀4-1被另一组水位控制装置6以同上的方式打开，管网水开始进入调节水箱7，直到水面恢复上升至水位

时、小部分水从上沿溢流进入开式小水箱6-1托起浮球阀5-2以关闭液压水位控制阀4-1为止，完成对调节水箱7的补水；当调节水箱7的水面下降到水位

与

之间，适逢管网水压恢复上升高于设定值，水力开关阀10重新被打开，此时液压水位控制阀4-2已处在打开状态，管网水即流经此进入调节水箱7，直至水面恢复上升到水位

液压水位控制阀4-2自动关闭完成补水为止。There are two sets of water level control devices 6 inside the adjusting water tank 7. Except for the different lengths of the pipe sections of the siphon water level control pipe 6-2, the other structures are the same, and are used to control different switch water levels and open the hydraulic water level control valve 4 in good time. -1, 4-2 replenish water to the regulating water tank 7. Under the situation of constantly extracting water, the water level of regulation water tank 7 descends to water level

At this time, the siphon water level control pipe 6-2 on the water level control device 6 begins to form a siphon to discharge water, and the water in the small open water tank 6-1 is pumped to the regulating water tank 7 until the water surface in the small open water tank 6-1 drop to water level

Air enters from the port of the siphon water level control pipe 6-2 until the siphon is destroyed. At this time, the float valve 5-2 falls back, and the hydraulic water level control valve 4-2 is opened but in a state where there is no water to enter; the water level of the adjustment water tank 7 continues to drop to water level

, the hydraulic water level control valve 4-1 is opened by another group of water level control devices 6 in the same manner as above, and the pipe network water begins to enter the regulating water tank 7 until the water surface recovers and rises to the water level

When, a small portion of water enters the open small water tank 6-1 from the upper edge overflow and holds up the float valve 5-2 so as to close the hydraulic water level control valve 4-1, so as to complete the replenishment of the regulating water tank 7; when the water level of the regulating water tank 7 drop to water level

and

In between, when the water pressure of the pipe network recovers and rises higher than the set value, the hydraulic switch valve 10 is opened again, and the hydraulic water level control valve 4-2 is already in the open state, and the pipe network water flows through it into the regulating water tank 7. Until the water surface recovers and rises to the water level

The hydraulic water level control valve 4-2 is automatically closed until the water replenishment is completed.

与两者之差所产生的容量，该容量大小根据管网用水高峰时段用户的用水量确定，以使调节水箱7的补水时段与管网用水高峰时段错开，又确保水力开关阀10关闭时用户的用水量需求。Adjust the adjustment capacity of the water tank 7 to be the water level

and The capacity produced by the difference between the two is determined according to the water consumption of the user during the peak water consumption period of the pipe network, so that the replenishment period of the water tank 7 is staggered from the peak water consumption period of the pipe network, and the user's water consumption is ensured when the hydraulic switch valve 10 is closed. water demand.

The adjustment capacity of the adjustment water tank 7 can also be flexibly determined according to the needs of users.

两者之差所产生的容量。When the fluctuation of the water supply pressure of the pipe network does not cause the hydraulic water level control valve 4-2 to open and close frequently (generally≯6 times/h), the corresponding water level control device 6 can be canceled, and the adjustment capacity of the water tank 7 is adjusted to the water level at this time. and

The capacity produced by the difference between the two.

Regulating water tank 7 can be provided with ultraviolet sterilizing device according to user's requirement, is controlled by electric control cabinet 20 and carries out water disinfection process regularly or irregularly.

4. Water level control device 6

水从上沿溢流进入开式小水箱6-1内淹没上端管口空气不能排出为止，使虹吸水位控制管6-2内上半部分形成封闭的空气柱，空气柱两端存在液气交界面，其中一端交界面在上端管段内，另一端在U形管内，两者处在同一高度位置上。此时，浮球阀5-2、5-2浮起处在关闭状态，调节水箱7停止进水；当从调节水箱7抽取水时，持续下降的水面促使虹吸水位控制管6-2内空气柱两端液气交界面不断上下改变相对位置，上端管段内的交界面上升，U形管内的交界面下降，由于上端管段内径较U形管内径大，故U形管内交界面的下降速度要大于上管口内交界面的上升速度，速度之比为两者内径平方的反比，在开式小水箱6-1内的水面高度基本保持不变的前提下，与调节水箱7的水面高差不断加大。当达到最大高差时虹吸水位控制管6-2内液气交界面上升通过顶端转为下降直至形成虹吸放水，开式小水箱6-1内的水通过虹吸水位控制管6-2排入调节水箱7，浮球阀5-1、5-2回落打开液压水位控制阀4-1、4-2，水箱恢复进水。该最大高差产生的容量即为调节水箱7的调节容量，最大高差值即为浮球阀5-1、5-2的开关水位差。When adjusting the water intake of the water tank 7, the rising water surface first submerges the lower nozzle of the siphon water level control pipe 6-2, and forces the air in the pipe to be discharged from the upper nozzle until the water surface rises to the water level

Water overflows from the upper edge into the open small water tank 6-1 until the upper nozzle is submerged and the air cannot be discharged, so that the upper part of the siphon water level control pipe 6-2 forms a closed air column, and there is a liquid-gas exchange at both ends of the air column. Interface, where one end of the interface is in the upper pipe section, and the other end is in the U-shaped pipe, both of which are at the same height. At this time, the float valve 5-2, 5-2 floats and is in a closed state, and the regulating water tank 7 stops water intake; The relative position of the liquid-gas interface at both ends changes continuously up and down, the interface in the upper pipe section rises, and the interface in the U-shaped pipe decreases. Since the inner diameter of the upper pipe section is larger than that of the U-shaped pipe, the falling speed of the interface in the U-shaped pipe is faster than that of the U-shaped pipe. The rising speed of the interface in the upper pipe mouth, the ratio of the speed is the inverse ratio of the square of the inner diameters of the two. Under the premise that the water surface height in the open small water tank 6-1 remains basically unchanged, the water surface height difference with the adjustment water tank 7 is constantly increasing. big. When the maximum height difference is reached, the liquid-gas interface in the siphon water level control tube 6-2 rises and passes through the top to turn down until a siphon is formed to release water, and the water in the open small water tank 6-1 is discharged into the siphon water level control tube 6-2 for adjustment. Water tank 7, ball float valve 5-1, 5-2 fall back and open hydraulic water level control valve 4-1, 4-2, and water tank resumes water intake. The capacity produced by the maximum height difference is the adjustment capacity of the regulating water tank 7, and the maximum height difference is the switch water level difference of the float valves 5-1, 5-2.

In order to ensure that the water flow in the pipe is in a full flow state, the inner diameter of the U-shaped pipe of the siphon water level control pipe 6-2 is not greater than 20mm, generally 3-4mm is more suitable, and an excessively large inner diameter will make the siphon water level control pipe 6-2 A horizontal liquid-air interface occurs within the top, preventing siphon formation. The inner diameter of the lower pipe section of the siphon water level control pipe 6-2 is not less than the inner diameter of the U-shaped pipe. When a larger inner diameter is adopted, the liquid-gas interface in the pipe can be accelerated in due course to move through the top of the siphon water level control pipe 6-2 to promote siphon formation.

In order to increase the siphon drainage flow, more than 4 and no less than 2 siphon water level control pipes 6-2 can also be used in parallel. The function of the connecting piece 6-3 is: when one of them forms a siphon to discharge water, it will pass through the channel 6-4 Produce suction on other strips, promote the formation of siphon and achieve common drainage.

When the float valve 5-2,5-2 was in the open state, the outgoing water could not directly enter the open small water tank 6-1.

5. According to user requirements, when it is necessary to rotate the water supply from the pipe network and the regulating water tank 7, the electric control cabinet 20 realizes automatic control or manual control through programming on the electric control cabinet 20. The pressure is passed into the back pressure chamber 10-9 from the back pressure hole 10-10 on the hydraulic switching valve 10 through the back pressure pipe 11, and acts on the soft rubber membrane 10-4, which is in contact with the water pressure of the positive pressure chamber 10-8. Relatively offset, the gravity gate 10-5 just falls back and closes under the action of gravity, and now the pressurized water pump 16 can only extract the water of the regulating water tank 7; The pressure pipe 13 is released to the atmosphere, and the gravity gate 10-5 is pushed to open by the water pressure of the positive pressure chamber 10-8, and the water supply to the pressurized water pump 16 is resumed by the pipe network. The inner diameter of the pressure relief pipe 13 is generally not greater than 10 mm, and not greater than one-fifth of the inner diameter of the back pressure pipe 11 .

Solenoid valve 12 also can use the valve of manual opening and closing instead.

6. Throttle orifice 3-1, 3-2

The throttling orifice plates 3-1 and 3-2 play the role of regulating pressure and throttling, prolonging the time for adjusting the water intake of the water tank 7 in a timely manner, and helping to improve the regulating ability of the pipe network. The orifice size of the orifice is related to the flow rate, the adjustment capacity of the water tank and the set value of the water supply pressure of the pipe network, and is determined after hydraulic calculation.

7. Pressurized water pump 16 and operation control

The operation of the pressurized water pump 16 is automatically controlled by the pressure transmitter 18 and the electric control cabinet 20. It adopts the constant pressure and frequency conversion water supply operation mode. In addition to the above control functions, the electric control cabinet 20 also includes phase loss, undervoltage, and short circuit. , overload and high and low water level alarms and other conventional safety protection functions.

The water pump operates in a soft start mode, and the check valve on the water outlet pipe of the water pump has a slow closing function to suppress the transient flow in the pipeline and prevent water hammer from occurring.

Both the pressure transmitter 18 and the electric control cabinet 20 can be purchased from the market according to usage requirements.

3. Selection calculation

It is mainly to determine the adjustment capacity of the water tank 7 and the water flow rate, the weight of the gravity gate 10-5 of the hydraulic switch valve 10, the switch water level difference of the water level control device 6, and the orifice diameters of the throttle orifice plates 3-1 and 3-2 .

1. Regulating water tank 7

The adjustment capacity V _d is calculated according to the following formula

V _d =KT _h Q _h (1)

Where V _d - adjustment capacity, m ³

T _h - the time staggered from the peak water consumption of the pipe network, h

Q _h - design hour water consumption, m ³ /h

K-safety factor, take 1.0～1.1

The T _h value is determined according to the peak water consumption period of the pipe network in summer, generally about 2 hours. When the water intake time of the water tank does not need to be completely staggered from the peak water consumption of the pipe network, it can be determined according to user needs.

The water tank inlet flow Q _j is calculated according to the following formula

Q _j =T _h Q _h /T _j (2)

In the formula, Q _j - water flow rate, m ³ /h

T _j - interval time between water consumption peaks in the pipe network, h

The value of T _j is determined according to the time interval between two adjacent water consumption peaks of the pipeline network in summer, generally about 6 hours.

When the water intake time of the water tank does not need to be completely staggered with the peak water consumption of the pipe network, or the water tank 7 whose capacity has been determined is adjusted, the water tank inflow flow Q _j ′ is calculated according to the following formula

Q _j '=Q _h -V _j '/(KT _j ) (3)

In the formula, Q _j ′-influent flow rate, m ³ /h

V _j ′-adjustment capacity, m ³

2. Gravity gate 10-5

Gravity gate 10-5 weight W _z is calculated according to the following formula

W _z = πp _j d _j ² /40 (4)

In the formula, W _z - weight of gravity gate 10-5 including bolt 10-6 and gasket 10-7, kg

p _j - water supply pressure setting value of pipe network, mPa

π-pi, 3.14

d _j - calculated inner diameter of water inlet 10-14 of hydraulic on-off valve 10, mm

40-unit conversion constant

3. Water level control device 6 switch water level difference

The switch water level difference H is related to the inner diameter and shape of the siphon water level control pipe 6-2, and there is the following relationship

H＝H _s d _s ² /d _u ² +πD _u /2 (5)

In the formula, H-switch water level difference, mm

H _s - the height of the upper pipe section, mm

d _s - the inner diameter of the upper pipe section, mm

d _u - inner diameter of U-shaped tube, mm

D _u - U-shaped tube semi-circular diameter, mm, D _u is generally taken as 20 ~ 30mm

In formula (5), the value of H _s should meet the requirements of floating ball valves 5-1 and 5-2 to complete the switching action by floating up and down, and the value of H _s is generally about 100mm. Generally, H, H _s , D _u and d _u are known, and d _s can be obtained by formula (5).

4. Throttle orifice 3-1, 3-2 and others

The orifice diameters of the throttling orifice plates 3-1 and 3-2, the type selection of the pressurized water pump 16 and the size of the pipeline are all determined after relevant hydraulic calculations are carried out according to the water supply and drainage design manual.

Four. Conclusion

The role of superimposed water supply equipment in the pipe network is relay pressurization, which is in a local subordinate position, and its energy-saving effect should be positioned from the overall perspective of the pipe network. The balanced water supply of the pipe network generally has the lowest energy consumption, which is a necessary condition for the efficient and energy-saving operation of the pipe network. Only on the premise that it is conducive to the balanced water supply of the pipe network, the superimposed water supply equipment can realize the role change from "impossible" to "promote". , Alleviate the contradiction between supply and demand, and fundamentally eliminate the hidden dangers of safe water supply, in order to lay the technical foundation for large-scale application in the pipeline network, and to truly and comprehensively exert the energy-saving effect of stacked water supply equipment to achieve a win-win situation for supply and demand.

In more than 600 cities in my country, more than two-thirds of the water shortages, the main reason for this prominent contradiction between supply and demand is often not the total supply can not meet the total demand, but the peak of water use, the proportion of domestic water consumption This is especially true for larger cities. Under such circumstances, blindly adding and expanding water plants not only requires a huge investment and a long cycle, but also cannot effectively use water resources and cause waste of strategic resources. Obviously, it is not a good way to solve the contradiction between supply and demand. Improving the adjustment ability of the water supply network itself and promoting the balanced water supply of the network can greatly alleviate the contradiction between supply and demand, and even completely solve the water shortage situation. It is also a good and economical and feasible method. Obviously, the current operation mode of superimposed water supply equipment will exacerbate the contradiction between supply and demand of the pipe network, causing users to install more such equipment helplessly, entering a vicious circle, which in essence results in increased energy consumption and waste of resources, and should be stopped Or strictly limit the use in the pipe network.

The utility model is a new type of superimposed water supply equipment that fully meets the requirements of the water supply and drainage design specifications. Its innovative, safe and reliable hydraulic automatic control method can realize the fundamental transformation from being unable to promote the balanced water supply of the pipe network, and is in the leading position in technology. The status is energy-saving equipment in the true sense, and it is an upgraded product of pipe network superimposed water supply equipment.

Claims (4)

1. pressure-superposed water supplying facility of hydraulic power automatic control pipe network, comprise hydraulic water level control valve (4-1) (4-2), regulating tank (7), pressure pump (16), water inlet manifold (1) and outlet pipe (17), it is characterized in that described water inlet manifold (1) is connected with an end of the tube connector (8) of end of tank inlet pipe (2-1) and waterpower switch valve (10) respectively; The other end of described tank inlet pipe (2-1) is connected regulating tank (7) top, set gradually restricting orifice (3-1), hydraulic water level control valve (4-1) and float valve (5-1) on the tank inlet pipe (2-1), float valve (5-1) is placed in the little water tank of open type (6-1) of water-level control apparatus (6), water-level control apparatus (6) has two, and it is identical that both remove priming level control valve 6-2 external structure; The little water tank of open type (6-1) is arranged on regulating tank (7) internal upper part; The other end of the tube connector (8) of described waterpower switch valve (10) is connected with the water inlet (10-14) of waterpower switch valve (10), the delivery port (10-15) of waterpower switch valve (10) connects the tube connector (9) of waterpower switch valve (10), tube connector (9) is connected with the suction water pipe (14) of pressure pump (16), and pressure pump (16) outlet connects outlet pipe (17); Horizontal segment at the tube connector (9) of waterpower switch valve (10) picks out the U-shaped pipe downwards, the U-shaped pipe other end is connected with tank inlet pipe (2-2), upward set gradually restricting orifice (3-2), hydraulic water level control valve (4-2) and float valve (5-2) by water (flow) direction at tank inlet pipe (2-2), float valve (5-2) is placed in the little water tank of open type (6-1); Pick out back pressure pipe (11) from waterpower switch valve tube connector (8) and be communicated with back pressure hole (10-10) on the waterpower switch valve (10), back pressure pipe (11) is provided with electromagnetic valve (12); Relief hole (10-11) on the waterpower switch valve (10) connects relief tube (13) and communicates with atmosphere.

2. pressure-superposed water supplying facility of hydraulic power automatic control pipe network according to claim 1, it is characterized in that, described waterpower switch valve (10) is by flange valve seat (10-1), all flanged tee (10-2), flange valve gap (10-3), soft rubber film (10-4), weight brake (10-5), bolt (10-6), sealing mat (10-7) and sealing ring (10-12) constitute, by vertical from down to up in proper order, flange valve seat (10-1), sealing ring (10-12), all flanged tee (10-2), soft rubber film (10-4) and flange valve gap (10-3) dock in twos, between the flange of flange valve seat (10-1) and all flanged tee (10-2), closely fixing between the flange of all flanged tee (10-2) and flange valve gap (10-3) with bolt, water inlet (10-14) on the flange valve seat (10-1) down, the delivery port (10-15) on all flanged tee (10-2) is a horizontal direction; Sealing mat (10-7) is pasted in weight brake (10-5) lower surface, and the upper end is closely fixing with soft rubber film (10-4) and weight brake (10-5) with bolt (10-6).

3. pressure-superposed water supplying facility of hydraulic power automatic control pipe network according to claim 1, it is characterized in that, described water-level control apparatus (6) is made of little water tank of open type (6-1) and priming level control valve (6-2), priming level control valve (6-2) is made up of the pipeline section of different inner diameters, two ends are the bigger pipeline section of internal diameter, the centre is the less U-shaped pipe of internal diameter, and the radially section configuration of U-shaped pipe is not limited to circle, and internal diameter is not more than 20mm when adopting circle; There is difference in height at priming level control valve (6-2) two ends, a higher end stretches in the little water tank of open type (6-1), a lower end stretches in the regulating tank (7), the semi-circular top of U-shaped pipe exceeds the upper edge of the little water tank of open type (6-1), the water level of the upper edge absolute altitude of the little water tank of open type (6-1) and regulating tank (7)

Flat.

4. pressure-superposed water supplying facility of hydraulic power automatic control pipe network according to claim 3, it is characterized in that, the bar number of described priming level control valve (6-2) greater than 4, be no less than 2, parallel with one another, adopt connectedness (6-3) to be communicated with, the passage (6-4) in the connectedness (6-3) makes in the priming level control valve (6-2) and communicates in twos.

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