WO2013044529A1

WO2013044529A1 - Booster pump and reverse osmosis system applying same

Info

Publication number: WO2013044529A1
Application number: PCT/CN2011/080621
Authority: WO
Inventors: 孙茂华
Original assignee: 深圳市莱德士科技有限公司
Priority date: 2011-09-28
Filing date: 2011-10-10
Publication date: 2013-04-04
Also published as: TWI520771B; TW201313304A; CN102330648A; CN102330648B

Abstract

Disclosed are a booster pump and a reverse osmosis system applying the same. The booster pump comprises a housing (10), a left-hand pressurized water cylinder (20) and a right-hand pressurized water cylinder (30) placed symmetrically at the two ends of the housing (10), and a reversing mechanism (4) placed between the left-hand pressurized water cylinder (20) and the right-hand pressurized water cylinder (30), the reversing mechanism (4) pushing a valve rod support (42) and a valve rod by means of drive springs (451, 452) and thereby reversing the direction. By using the pressure from the water supply itself and the pressure energy in the water recovered from the reverse osmosis, the booster pump and the reverse osmosis system applying same automatically pressurize the water and maintain their own operation, without the need for electrical energy, and with low raw water consumption.

Description

Booster pump and reverse osmosis system using the same

Technical field

The invention belongs to the technical field of household pure water treatment equipment production, and more particularly to a booster pump that does not need electricity and a reverse osmosis system that uses the booster pump.

Background technique

The use of small reverse osmosis systems to manufacture household pure water devices is becoming more and more common in the market. In this system, an ultra-low pressure reverse osmosis membrane element is functioning. In order to meet the requirements of the membrane element, the inlet raw water pressure should be Between 4 and 6 Kgf/cm ² , but in China and most countries and regions of the world, the pressure on municipal tap water is not so high. Therefore, in this small system, there must be a supercharger to pressurize the tap water. Enter the reverse osmosis unit.

At present, the most commonly used in the market is an electric diaphragm pump, which is driven by a DC motor to drive an axial diaphragm pump to pressurize the tap water. The general installation of the whole system is shown in Figure 1, which includes The reverse osmosis unit 100' neutralizes the electric booster pump 200' pressurized by the reverse osmosis unit 100' and the power adapter, solenoid valve 300', pure water pressure tank 400', MCU controller 500', water level sensing The device 600' has a wastewater ratio of 700' (ie, a solenoid restrictor valve).

Since the booster pump is driven by a motor, this has the following drawbacks:

(1) Waterway and circuit must be installed at the same time, which causes the system to have both waterway and circuit. The system control is more complicated. It requires sensor/MCU/actuator to control the on/off of waterway and circuit. It is not convenient to control and install. And the failure rate is high;

(2) The system needs electric energy for operation, which is not only harmful to environmental protection, but also cannot work if the system is out of power;

(3) During the operation of the system, the pressure of the pure water pressure tank gradually increases, the back pressure increases, the water output of pure water decreases, and the flow rate of the wastewater is almost unchanged, thus the raw water consumed by the unit water production increases;

(4) The cost of the system itself and the operating cost of the system are both high.

Thus, replacing the supercharging system of the reverse osmosis system with a device that does not require electric drive is an improved direction. However, existing similar booster pumps that are not used, such as reciprocating hydraulic cylinders, reciprocating cylinders, pneumatic diaphragm pumps, etc., are directly pushed by the piston to the valve stem of the control valve when the piston is moved to the extreme position during the commutation process. When the piston moves at a low speed, the inertia of the valve stem is not enough to push itself over the middle position of the valve. At this time, the internal water flow of the valve is short-circuited or broken, and the piston has no pressure to drive it to move, so that it is easy to stop or even jam and cause the whole The organization stopped and could not operate.

technical problem

The technical problem to be solved by the present invention is to provide a booster pump, which aims to solve the problem that the built-in reversing mechanism is prone to stealing and the booster pump cannot operate, and the booster pump does not need electricity.

Technical solution

In order to solve the above technical problem, the technical solution adopted by the present invention is to provide a booster pump including a casing, a left hydraulic cylinder and a right hydraulic cylinder symmetrically disposed at two ends of the casing, and disposed at the same a reversing mechanism between the left hydraulic cylinder and the right hydraulic cylinder;

The left hydraulic cylinder is divided into a first left pressure chamber and a second left pressure chamber by a left diaphragm, and the left hydraulic cylinder is further provided with a left piston and a set of left water pressure disposed on the left piston a cylinder sleeve; the right hydraulic cylinder is divided into a first right pressure chamber and a second right pressure chamber by a right diaphragm, and the right hydraulic cylinder is further provided with a right piston and a sleeve sleeved on the right piston Right water cylinder liner;

The reversing mechanism is disposed between the left hydraulic cylinder and the right hydraulic cylinder, and includes: two left reversing valves respectively connected to the first left pressure chamber and the second left pressure chamber, Two right reversing valves, a valve stem bracket and a push rod that can transmit the thrust of the left piston and the right piston, respectively, connected to the first right pressure chamber and the second right pressure chamber;

The left reversing valve and the right reversing valve are two-position three-way valves, and the two left reversing valves and the two right reversing valves are disposed on the valve stem bracket and respectively disposed on a left reversing direction Inside the valve body and a right reversing valve body;

The left and right ends of the push rod are respectively inserted on the left piston and the right piston, and a left drive spring and a right drive spring are respectively disposed on the left and right segments of the push rod; a valve stem bracket is disposed between the left drive spring and the right drive spring and is slidable to the left or right on the push rod by the driving of the left drive spring and the right drive spring;

An elastic stop assembly is also disposed between the housing and the valve stem bracket.

Further, the left hydraulic cylinder is enclosed by a left end cover and a left hydraulic cylinder, and the left hydraulic cylinder is sleeved on the left hydraulic cylinder sleeve, and the left end of the left piston a right piston cap is further disposed; the right hydraulic cylinder is enclosed by a right end cap and a right hydraulic cylinder, and the right hydraulic cylinder is sleeved on the right hydraulic cylinder sleeve, A right piston cap is also provided at the right end of the right piston.

Specifically, the left diaphragm is press-fitted on the left hydraulic cylinder through a left diaphragm pressure ring, and the left diaphragm is pressed on the right hydraulic cylinder through a right diaphragm pressure ring.

Specifically, the elastic stop assembly is provided as two sets, each of the elastic blocking assemblies includes a roller, a movable stop, an elastic component and a gland, and the two rollers are disposed on the valve stem bracket and Located above and below the push rods respectively, the movable block abuts against the roller, and the pressure cover is disposed on the housing and presses the elastic member against the movable block.

Further, a first left sealing ring is disposed between the left hydraulic cylinder and the left end cover, and a first right sealing ring is disposed between the right hydraulic cylinder and the right end cover; A second left sealing ring is disposed between the piston and the left hydraulic cylinder sleeve, and a second right sealing ring is disposed between the right piston and the right hydraulic cylinder sleeve.

The beneficial effect of the booster pump provided by the present invention is that the booster pump of the present invention automatically pressurizes water and maintains its own operation by utilizing the pressure of the tap water itself and recovering the pressure energy in the reverse osmosis wastewater. The reversing mechanism realizes the reversing by pushing the valve stem bracket and the valve stem by the driving spring to replace the valve stem of the conventional design which directly pushes the control valve through the piston itself, so that during the reciprocating motion of the left and right reciprocating pistons, Since the movement of the valve stem bracket is driven by the left and right drive springs, even if the left and right pistons do not move, the energy stored during the compression of the drive spring is sufficient to continue to drive the valve stem bracket to open the elastic blocking assembly and cross the middle of the valve. Position, to achieve the purpose of reversing valve reversing, and this reversing process is very fast, very reliable, completely avoiding the occurrence of stealing, as long as there is suitable water pressure conditions, the entire booster pump mechanism does not need a motor The drive is automatically maintained by the mechanical pressure of the water.

The technical problem to be solved by the present invention is to provide a reverse osmosis system, which aims to solve the problems that the supercharging device needs to use electricity to bring about water channels and circuits in the system, resulting in complicated system control, high cost and no green environmental protection. .

In order to solve the above technical problem, the technical solution adopted by the present invention is to provide a reverse osmosis system including a reverse osmosis unit and a supercharging device, and the pressurizing device is supercharged as described above. a first left pressure chamber of the booster pump is connected to the raw water inlet and the water inlet of the reverse osmosis unit through a left reversing valve, and the second left pressure chamber of the booster pump passes through another The left reversing valve is connected to the waste water outlet of the reverse osmosis unit and the drain of the system, and the first right pressure chamber of the booster pump passes through the right reversing valve and the raw water inlet and the reverse osmosis unit The water inlet is connected, and the second right pressure chamber of the booster pump is connected to the waste water outlet of the reverse osmosis unit and the drain of the system through another of the right reversing valves.

Further, a pressure limiting valve is further disposed on the pipeline of the booster pump.

Further, the utility model further comprises a pure water pressure tank and a three-way pipe, wherein the three ports of the three-way pipe are respectively connected with the pure water outlet of the reverse osmosis unit, the pure water pressure tank and the faucet.

Further, the method further includes a pressure-controlled four-face valve, wherein the first water inlet and the first water outlet of the pressure-controlled four-face valve are respectively connected to the raw water inlet and the pressure limiting valve, and the second of the pressure-controlled four-sided valve The water inlet and the second water outlet are respectively connected to the pure water outlet of the reverse osmosis unit and the three-way pipe.

Further, a pre-filter is further disposed between the raw water inlet and the pressure-controlled four-face valve, and a post filter is further disposed between the tee and the faucet.

Beneficial effect

The beneficial effects of the reverse osmosis system provided by the present invention are as follows: the supercharging device of the reverse osmosis system of the present invention adopts the above-mentioned boosting pump which can automatically and continuously operate under the pressure of the water body itself, without supplying electric energy thereto, as long as the raw water The inlet pressure of more than 0.1 MPa can make the whole reverse osmosis system operate normally. Therefore, the initial installation of the entire reverse osmosis system only needs to install the waterway, and only one pressure control valve is needed to control the opening and closing of the waterway, and the sensor is avoided. The use of /MCU/executive components, etc., not only makes the installation and control of the system relatively simple, but also greatly reduces the failure rate of the equipment. Secondly, the operation of the entire reverse osmosis system does not require electricity, and it is very green, even in the event of power failure. It can also operate normally; in addition, the reverse osmosis system consumes less raw water, and the flow ratio of waste water and purified water is basically kept constant, thereby saving raw water consumption; finally, the cost of the reverse osmosis system itself and the cost of operation are low. It is very beneficial to promote it in ordinary families.

DRAWINGS

1 is a schematic structural diagram of a conventional reverse osmosis system;

2 is a schematic structural diagram of a reverse osmosis system according to an embodiment of the present invention;

3 is a schematic exploded view of a booster pump according to an embodiment of the present invention;

4 is a vertical cross-sectional structural view of a booster pump according to an embodiment of the present invention along a longitudinal center line;

5 is a schematic cross-sectional structural view of a booster pump according to an embodiment of the present invention along a longitudinal center line;

6 is a schematic perspective structural view of a booster pump according to an embodiment of the present invention;

7 is a schematic structural view of a reversing mechanism in a booster pump according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a working principle of a booster pump according to an embodiment of the present invention; FIG.

9 is a schematic diagram 1 of an operation principle of a reverse osmosis system according to an embodiment of the present invention;

FIG. 10 is a second schematic diagram of the operation principle of the reverse osmosis system according to an embodiment of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to Figures 3 to 7 and Figure 9, the booster pump provided by the present invention will now be described.

Referring first to FIG. 3, the booster pump includes a housing 10, a left hydraulic cylinder 20 and a right hydraulic cylinder 30, and a reversing mechanism 4. The left hydraulic cylinder 20 and the right hydraulic cylinder 30 are completely structurally and fully sized. Similarly, the symmetry is disposed at the two ends of the casing 10, and the reversing mechanism 4 is disposed between the left hydraulic cylinder 20 and the right hydraulic cylinder 30;

The left hydraulic cylinder 20 is partitioned into a first left pressure chamber 201 and a second left pressure chamber 202 through a left diaphragm 23, and a left piston 24 is disposed in the left hydraulic cylinder 20 and is disposed on the left piston 24 The upper left hydraulic cylinder liner 26; symmetrical to the structure in the left hydraulic cylinder 20, the right hydraulic cylinder 30 is partitioned into a first right pressure chamber 301 and a second right pressure chamber 302 through a right diaphragm 33, The right hydraulic cylinder 30 is further provided with a right piston 34 and a right hydraulic cylinder sleeve 36 sleeved on the right piston 34;

Referring to FIG. 3 to FIG. 5 and FIG. 7 and FIG. 9 , the reversing mechanism 4 is disposed in the casing 10 and located between the left hydraulic cylinder 20 and the right hydraulic cylinder 30 . The reversing mechanism 4 includes: two left reversing valves 401, two right reversing valves 402, a valve stem bracket 42 and a push rod 43; two left reversing valves 401 and the first left pressure chamber 201 and The second left pressure chamber 202 is connected, and the two right reversing valves 402 are respectively connected to the first right pressure chamber 301 and the second right pressure chamber 302; the left reversing valve 401 and the right reversing valve 402 are two. The three-way valve may be a shuttle valve or a ball valve. The valve stem 411 of the two left reversing valve 401 and the valve stem 412 of the two right reversing valves 402 are disposed on the valve stem bracket 42 and respectively disposed on the left side. Reversing the valve body 441 and the right reversing valve body 442; of course, each hydraulic cylinder is connected to the interface 101 that is open to the outside of the housing 10 after being connected to the corresponding reversing valve;

The left and right ends of the push rod 43 are respectively inserted on the left piston 24 and the right piston 34, and the push rod 43 can transmit thrust between the left piston 24 and the right piston 34. And a left drive spring 451 and a right drive spring 452 are respectively disposed on the left and right sections of the push rod 43; the valve stem bracket 42 is located between the left drive spring 451 and the right drive spring 452, and Under the driving action of the left driving spring 451 and the right driving spring 452, it can slide to the left or right on the push rod 43; when the left piston 24 moves, the left driving spring 451 or the right piston 34 is compressed to compress the right driving spring. 452, thereby giving the valve stem bracket 42 a driving force, while the left and right pistons do not directly push the valve stem bracket 42;

A resilient stop assembly 46 is also disposed between the housing 10 and the valve stem bracket 42.

The booster pump provided by the invention can automatically pressurize the water by utilizing the pressure of the tap water itself and the pressure energy in the recovered reverse osmosis waste water; the specific operation process is as follows: see Fig. 8, when the water pressure from the outside to the first left is When water is injected into the cylinder 201, the water pressure generates a rightward thrust to the left piston 24 to move to the right side, and the right piston 34 also moves to the right together under the push of the push rod 43, due to the valve stem bracket 42 It is slidably disposed on the push rod 43, so that the valve stem bracket 42 does not follow the push rod 42. As shown in Fig. 8a, when the left piston 24 just starts moving, the amount of compression of the left drive spring 451 is small, and the generated elastic force is insufficient. Having the stem bracket 42 lift the resilient stop assembly 46 up against the resistance of the resilient stop assembly 46 to the stem bracket 42 at this stage, the stem bracket 42 and the reversing valve stem disposed thereon remain Without moving, the direction of the water flow in the booster pump remains unchanged, the left piston 24 continues to move forward; the left drive spring 25 continues to be compressed, see Figure 8b; when the left piston 24 moves to a certain position, the left drive spring 24 is compressed When the amount is large enough, the elastic potential of its accumulation The generated spring force is sufficient to drive the valve stem bracket 42 to push the elastic stop assembly 46 and move to the other side of the elastic stop assembly 46, while driving the valve stems together to move over the intermediate position of the reversing valve to complete the water flow change. Until the right limit position of the valve stem bracket 42 is reached, see Fig. 8c; when the reversing valve completes the commutation, the water flow direction changes, the right piston 34 starts to push the push rod 43 and the left piston 24 moves to the left, and its operation process The foregoing process of moving to the left is the same, but the direction is opposite; during the reciprocating cyclic motion of the piston, since the movement of the valve stem bracket 42 is driven by the left and right driving springs, even the left and right pistons are not Movement, the energy stored during the compression of the drive spring is also sufficient to continue pushing the valve stem bracket 42 to push the elastic barrier assembly 46 over the intermediate position of the valve. This commutation process is very rapid and very reliable, completely avoiding the sneak stop phenomenon. The occurrence of the booster pump is automatically maintained by the mechanical pressure of the water without the need of the motor drive as long as there is a suitable water pressure condition.

Further, referring to FIG. 3 to FIG. 5 , as one embodiment of the booster pump provided by the present invention, the left hydraulic cylinder 20 is enclosed by a left end cap 21 and a left hydraulic cylinder 22 . The left water pressure cylinder 22 is sleeved on the left hydraulic cylinder liner 26, and the left end of the left piston 24 is provided with a left piston cap 25; symmetrical to the structure in the left hydraulic cylinder 20, the right water The right cylinder 31 is enclosed by a right end cylinder 31 and a right hydraulic cylinder 32. The right hydraulic cylinder 32 is sleeved on the right hydraulic cylinder sleeve 36, and the right piston 34 is also provided with a right piston. Cap 35. In the embodiment, the hydraulic cylinder is directly enclosed by the end cover and the hydraulic cylinder, so as to save material, the piston cap is arranged on the piston, and the piston assembly is formed by the two, and the entire piston can be enlarged on the one hand. The contact area between the component and the diaphragm is such that the force of the diaphragm is uniformly distributed on the surface of the diaphragm to protect the diaphragm. On the other hand, it is more convenient to make the piston into a hollow structure than the integral molding. Achieve the role of saving materials and reducing the weight of equipment.

Further, referring to any one of FIG. 3 to FIG. 5 , as one embodiment of the booster pump provided by the present invention, the left diaphragm 23 is pressed by the left diaphragm pressure ring 27 to the left water pressure cylinder. On the body 22, the left diaphragm 33 is press-fitted to the right hydraulic cylinder 32 via a right diaphragm pressure ring 37. The pressure ring type fixing method makes the diaphragm firmly fixed on the hydraulic cylinder, and has high tolerance to pressure and is not easy to fall off.

Further, referring to FIG. 3 and FIG. 4 , as one embodiment of the booster pump provided by the present invention, the elastic stop assembly 46 is provided as two sets, and each of the elastic blocking assemblies 46 includes a roller 461 and an activity. A stopper 462, an elastic member 463 and a gland 464 are disposed on the valve stem bracket 43 and respectively located above and below the push rod 43. The movable stopper 462 and the roller 461 are respectively Abutment, the gland 464 is disposed on the housing 10 and presses the elastic member 462 against the movable block 462. In the present embodiment, the elastic member 463 is preferably a compression spring, and a spring piece, a high elastic rubber member or the like may be selected. The two rollers 461 are mounted on the valve stem bracket 42. When the valve stem bracket 42 is moved left and right, the spring is driven. Under the pushing action, the roller 461 hits and pushes the blocking of the two movable stoppers 462 provided on the casing 10. Since the elastic force of the elastic portion 463 acts against the movable stopper 462, the valve stem bracket 42 must obtain sufficient thrust. In order to push the movable stopper 462 away and move to the other side of the movable stopper 462, the design structure is ingenious and reasonable, so that the reversing action of the reversing mechanism is quick and reliable.

Further, referring to FIG. 3 , as a specific implementation manner of the booster pump provided by the present invention, a first left seal ring 28 is disposed between the left water pressure cylinder 22 and the left end cover 21, A first right sealing ring 38 is disposed between the right hydraulic cylinder 32 and the right end cover 31, and functions to prevent water from leaking to the outside of the pump body between the end cover and the hydraulic cylinder; the left piston A second left sealing ring 29 is disposed between the right hydraulic piston sleeve 26 and the right water pressure cylinder sleeve 36, and a second right sealing ring 39 is disposed between the right piston 34 and the right hydraulic cylinder sleeve 36. The water pressure cylinder sleeve functions to prevent water from leaking into the pump body. In this embodiment, the first left seal ring 28, the second left seal ring 29, the first right seal ring 38 and the second right seal ring 39 are preferably rubber parts, of course, between the piston and the water pressure cylinder sleeve There may be other sealing methods between the cover and the hydraulic cylinder, such as sealing with a sealant, but the sealing effect and service life are not as good as the sealing ring, and it is not conducive to the installation and disassembly between the components.

In addition, as shown in FIG. 3 to FIG. 6 , as a specific embodiment of the booster pump provided by the present invention, a base 110 is further disposed under the casing 10 . To facilitate the installation and placement of the pump body.

The invention also provides a reverse osmosis system. Referring to FIG. 2, FIG. 9 and FIG. 10, the reverse osmosis system includes a reverse osmosis unit 100 and a supercharging device 200, and the pressurizing device 200 is the above described boost pump. The first left pressure chamber 201 of the booster pump is connected to the raw water inlet 111 and the water inlet 101 of the reverse osmosis unit 100 through a left reversing valve 401, and the second left pressure chamber 202 of the boost pump passes another A left reversing valve 401 is connected to the waste water outlet 103 of the reverse osmosis unit 100 and the drain port 222 of the system, and the first right pressure chamber 301 of the booster pump passes through the right reversing valve 402 and the raw water. The inlet 111 is connected to the water inlet 101 of the reverse osmosis unit 100, and the second right pressure chamber 302 of the booster pump passes through the other right reversing valve 402 and the waste water outlet 103 and system of the reverse osmosis unit 100. The drain port 222 is connected. Since the reversing valve is a two-way three-way "OR" gate valve, each pressure chamber is connected to the two nozzles through the reversing valve, but can only communicate with one of the nozzles at the same time, such as the second left pressure chamber. 202 is connected to the waste water outlet 103 of the reverse osmosis unit 100 and the drain port 222 of the system through another of the left reversing valve 401, but at the same time, the second left pressure chamber 202 or the wastewater of the reverse osmosis unit 100 The outlets 103 are in communication or communicate with the system's drain 222 rather than at the same time.

The reverse osmosis system provided by the present invention has a boosting device 200 which is automatically operated continuously by the pressure of the water body itself as described above, and does not need to supply electric energy as long as the inlet water pressure of the raw water is greater than 0.1 MPa. The system can work normally, so the initial installation of the system only needs to install the waterway, and only one pressure control valve is needed to control the opening and closing of the waterway, avoiding the use of the sensor/MCU/actuator, etc., not only the installation and control of the system. It is relatively simple, and it also greatly reduces the failure rate of the equipment; the entire reverse osmosis system does not require electricity, is very green, and can operate normally even in the event of a power outage; in addition, the reverse osmosis system consumes less raw water. The flow ratio of wastewater and purified water is basically kept constant, which can save the consumption of raw water. Finally, the cost of the reverse osmosis system itself and the cost of operation are low, which is very beneficial for popularization in ordinary households.

For the connection between the booster pump and the reverse osmosis unit, please refer to FIG. 2, FIG. 9 and FIG. 10, four independent hydraulic chambers (ie, the first left pressure chamber 201, the second left pressure chamber 202, and the first right pressure chamber 301). The second right pressure chamber 302) is respectively connected with four motorized two-position three-way valves (ie, two left reversing valves 401 and two right reversing valves 402), and finally connected to the water inlet 101 of the reverse osmosis unit 100, The waste water outlet 103, the raw water inlet 111, and the drain 222 of the system. The working process is described as follows:

With the generation of pure water, under the pressure of the raw water (ie, tap water), the left and right pistons move to the right, the raw water enters the first left pressure chamber 201, and the second left pressure chamber 202 is discharged in a manner close to zero pressure. The waste water, the raw water in the first right pressure chamber 301 enters the reverse osmosis unit 100, and the high pressure waste water of the reverse osmosis unit 100 flows into the second right pressure chamber 302. At a position close to the right limit, the stems of the four shuttle valves are at Under the action of the accumulated pressure of the spring, it moves to the right, and the whole waterway completes the reversing. After the reversal, the raw water pressure drives the piston to move to the left, the raw water enters the first right pressure chamber 301, and the second right pressure chamber 302 approaches the zero pressure. The waste water is discharged, the raw water in the first left pressure chamber 201 enters the reverse osmosis unit 100, and the high pressure waste water of the reverse osmosis unit 100 flows into the second left pressure chamber 202 until reaching the vicinity of the left limit position, and the shuttle valve is reversed again, thereby completing A work cycle.

Referring to Figures 9 and 10, the pure water production capacity of the reverse osmosis system of the present invention is illustrated by calculation below.

The first left pressure chamber 201 is connected to the raw water inlet 111 and has a pressure P0; the second left pressure chamber 202 is connected to the system drain 222, the pressure is substantially 0; and the second right pressure chamber 302 is connected to the reverse osmosis unit 100. The outlet 103 is at a pressure P2; the first right pressure chamber 301 is connected to the water inlet 101 of the reverse osmosis unit 100, and the pressure is P1;

For the left and right diaphragms, the pressure calculation can be characterized by the equivalent area S. Approximately, S can be calculated by: S = π × (D ² + d1 ² ) / 8; (where D is the left hydraulic cylinder 22 Or the inner diameter of the right hydraulic cylinder 32, d ₁ is the left piston cap 25 or has the outer diameter of the piston cap 35, and d ₂ is the outer diameter of the left piston 24 or the right piston 34) the first left pressure chamber 201 and the first right Pressure area of the pressure chamber 301: S ₂₀₁ = S ₃₀₁ = S ;

The pressure area of the second left pressure chamber 202 and the second right pressure chamber 303: S ₂₀₂ = S ₃₀₂ = S - π × d ₂ ² / 4;

Take the initial state of the piston right shift as an example:

The thrust of the left piston 24 to the right: F1 = P ₀ × S _{201 -} 0 × S ₂₀₂ = P ₀ × S;

Thrust to the left of the right piston 34: F ₂ = P ₁ × S _{301 -} P ₂ × S ₃₀₂ = P ₁ × S - P ₂ × (S - π × d ₂ ² / 4)

= (P _{1 -} P ₂ ) × S + P ₂ × π × d ₂ ² / 4 ;

Since the water flows through the reverse osmosis unit 100, the pressure loss is small, ignoring the loss therein, assuming P ₁ = P ₂ = P, so F ₂ = P × π × d ₂ ² / 4;

If the friction during the piston movement is not counted, F ₁ =F ₂ , P ₀ ×S=P×π×d ₂ ² /4 in the equilibrium state;

Theoretical supercharging ratio: R _P = P / P ₀ = 4 × S / (π × d ₂ ² );

Assume that in the initial state, the left and right pistons move to the right by the distance X,

Raw water flow (volume) flowing into the water inlet of the reverse osmosis unit 100: S ₂₀₁ × X = S × X;

Waste water flow (volume) flowing out of the wastewater outlet of the reverse osmosis unit 100:

S ₃₀₂ × X = (S - π × d ₂ ² / 4) × X;

Pure water flow rate: S ₂₀₁ × X - S ₃₀₂ × X = (S _{201 -} S ₃₀₂ ) × X = π × d ₂ ² × X / 4;

Theoretical wastewater/pure water ratio:

R _W =(S - π × d ₂ ² /4) / (π × d ₂ ² × X / 4) = 4 × S / (π × d ₂ ² ) - 1 = R _P -1;

Assume that the operating frequency of the reciprocating motion of the piston is f (in minutes/minute), and the piston stroke is L; theoretical pure water production capacity: V = (π × d ₂ ² / 4) × 2 × F × L = π × d ₂ ² ×f×L/2;

In fact, due to the friction of the piston movement and the flow of water, the control valve also consumes part of the thrust, so the actual pressure ratio is smaller than R _P . There is a leak at the moment of commutation of the control valve, and the entire device is also slightly leaked, so the actual wastewater ratio is larger than R _W , and the pure water production is lower than V.

Specific embodiment calculation:

In the design of a specific embodiment, the relevant parameters are as follows:

D = 5 cm; d ₁ = 3.8 cm; d ₂ = 2.5 cm; F = 30 times / minute; L = 1.2 cm;

Calculated: S = 15.5 cm2; R _P = 3.15; R _W = 2.15; V = 350 ml / min (approximately 130 gallons / day);

If the tap water inlet pressure reaches 1.5Kgf/cm ² , the pressure can reach 4.7 Kgf/cm ² after pressurization, and the pressure or flow rate can meet the standard reverse osmosis that drives a rated water production of 50 gallons per day or 100 gallons per day. Membrane element.

Further, referring to FIG. 2, as a specific embodiment of the reverse osmosis system provided by the present invention, a pressure limiting valve 300 is further disposed on the pipeline of the raw water entering the booster pump. In the present embodiment, the water pressure entering the booster pump is limitedly controlled by providing the pressure limiting valve 300, so that the booster pump operates smoothly and protects the inside of the booster pump.

Further, referring to FIG. 2, as a specific embodiment of the reverse osmosis system provided by the present invention, a pure water pressure tank 400 and a three-way pipe 500 are also included, and the three ports of the three-way pipe 500 are respectively The pure water outlet 102 of the reverse osmosis unit 100, the pure water pressure tank 400, and the faucet 900 are connected. Thus, the pure water from the reverse osmosis unit 100 flows into the pure water pressure tank 400 for storage, and the faucet 900 is in communication with the pure water pressure tank 400 through the tee tube 500. When the faucet 900 is discharged outward, the pure water The water pressure inside the pressure tank 400 will be reduced. When the water pressure is reduced to a certain extent, the rice permeation system will operate by setting a device such as a pressure control valve to continue to produce pure water and enter the pure water pressure tank. 400 is added and stored.

Further, referring to FIG. 2, as a specific implementation manner of the reverse osmosis system provided by the present invention, a pressure control four-face valve 600 is further included, and the first water inlet 601 and the first water outlet of the pressure control four-sided valve 600 are further included. 602 is respectively connected to the raw water inlet 111 and the pressure limiting valve 300. The second water inlet 603 and the second water outlet 604 of the pressure controlled four-sided valve 600 are respectively connected with the pure water outlet 102 of the reverse osmosis unit 100. The tees 500 are connected. The pressure-controlled four-face valve 600 can actuate and seal the passage according to the change of the water flow pressure in the water inlet and outlet passages thereof, and control the inlet and outlet water by the mechanical pressure of the tap water and the pure water; in the embodiment, the pressure-controlled four-sided valve 600 is provided according to the pure The water pressure in the water pressure tank 400 automatically controls the water flow entering the reverse osmosis unit 100, and does not need to be connected to the power source, and the system can still work normally under the power failure state; due to the application of the four-sided valve, the system removes the low pressure switch and rinses The solenoid valve and the water inlet solenoid valve avoid the problem that the system cannot operate due to the failure of the electronic device, which greatly reduces the failure rate of the device and reduces the cost.

Further, still referring to FIG. 2 , as a specific implementation manner of the reverse osmosis system provided by the present invention, a pre-filter 700 is further disposed between the raw water inlet 111 and the pressure-controlled four-sided valve 600. A post filter 800 is further disposed between the tee 500 and the faucet 900. Specifically, to increase the effect of the pre-filter, the pre-filter 700 may include a PP cotton filter 701 and an activated carbon filter 702. Among them, the PP cotton filter 701 as a primary filter can remove particulate matter impurities such as sediment and rust in the tap water, and the PP cotton filter core has the advantages of long service life and low price; and the activated carbon filter 702 can adsorb the pre-stage filtration. The residual chlorine that cannot be removed prevents the reverse osmosis membrane from being oxidatively degraded, and also adsorbs pollutants such as small molecules and organic substances leaking from the former stage, and has obvious adsorption and removal on odor, colloid and pigment, heavy metal ions, etc. in the water. effect.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A booster pump, comprising: a casing, a left hydraulic cylinder and a right hydraulic cylinder symmetrically disposed at two ends of the casing, and the left hydraulic cylinder and the right hydraulic cylinder Reversing mechanism between

The left hydraulic cylinder is divided into a first left pressure chamber and a second left pressure chamber by a left diaphragm, and the left hydraulic cylinder is further provided with a left piston and a set of left water pressure disposed on the left piston a cylinder sleeve; the right hydraulic cylinder is divided into a first right pressure chamber and a second right pressure chamber by a right diaphragm, and the right hydraulic cylinder is further provided with a right piston and a sleeve sleeved on the right piston Right water cylinder liner;

The reversing mechanism is disposed between the left hydraulic cylinder and the right hydraulic cylinder, and includes: two left reversing valves respectively connected to the first left pressure chamber and the second left pressure chamber, Two right reversing valves, a valve stem bracket and a push rod that can transmit the thrust of the left piston and the right piston, respectively, connected to the first right pressure chamber and the second right pressure chamber;

The left reversing valve and the right reversing valve are two-position three-way valves, and the two left reversing valves and the two right reversing valves are disposed on the valve stem bracket and respectively disposed on a left reversing direction Inside the valve body and a right reversing valve body;

The left and right ends of the push rod are respectively inserted on the left piston and the right piston, and a left drive spring and a right drive spring are respectively disposed on the left and right segments of the push rod; a valve stem bracket is disposed between the left drive spring and the right drive spring and is slidable to the left or right on the push rod by the driving of the left drive spring and the right drive spring;

An elastic stop assembly is also disposed between the housing and the valve stem bracket.
The booster pump according to claim 1, wherein the left hydraulic cylinder is enclosed by a left end cover and a left hydraulic cylinder, and the left hydraulic cylinder is sleeved on the left. a left piston cap is disposed on the left end of the left piston; the right hydraulic cylinder is enclosed by a right end cap and a right hydraulic cylinder, and the right hydraulic cylinder is sleeved On the right hydraulic cylinder sleeve, a right piston cap is further disposed at a right end of the right piston.
The booster pump according to claim 2, wherein the left diaphragm is pressed against the left hydraulic cylinder by a left diaphragm pressure ring, and the left diaphragm is pressed by a right diaphragm pressure ring. The right water pressure cylinder is on the body.
The booster pump according to any one of claims 1 to 3, wherein the elastic stopper assembly is provided as two sets, and each of the elastic blocking assemblies includes a roller, a movable stopper, an elastic member, and a pressure cover, the two rollers are disposed on the valve stem bracket and respectively located above and below the push rod, the movable block abuts against the roller, and the pressure cover is disposed on the housing And pressing the elastic member against the movable block.
The booster pump according to claim 4, wherein a first left sealing ring is disposed between the left hydraulic cylinder and the left end cover, and the right hydraulic cylinder and the right end cover a first right sealing ring is disposed between the left piston and the left hydraulic cylinder liner, and a second left sealing ring is disposed between the right piston and the right hydraulic cylinder sleeve. Sealing ring.
A reverse osmosis system comprising a reverse osmosis unit and a pressurization device, wherein the pressurization device is the booster pump according to any one of claims 1 to 5, the first of the booster pump a left pressure chamber is connected to the raw water inlet and the water inlet of the reverse osmosis unit through a left reversing valve, and the second left pressure chamber of the booster pump passes through the other of the left reversing valve and the reverse osmosis The waste water outlet of the unit is connected to the drain port of the system, and the first right pressure chamber of the booster pump is connected to the raw water inlet and the water inlet of the reverse osmosis unit through a right reversing valve, the booster pump The second right pressure chamber is connected to the waste water outlet of the reverse osmosis unit and the drain of the system through another of the right reversing valves.
The reverse osmosis system according to claim 6, wherein the raw water entering the pipe of the booster pump is further provided with a pressure limiting valve.
The reverse osmosis system according to claim 7, further comprising a pure water pressure tank and a three-way pipe, wherein the three ports of the three-way pipe and the pure water outlet of the reverse osmosis unit are respectively The pure water pressure tank and faucet are connected.
The reverse osmosis system according to claim 8, further comprising a pressure-controlled four-face valve, wherein the first water inlet and the first water outlet of the pressure-controlled four-sided valve are respectively associated with the raw water inlet and the pressure limiting The valve is connected, and the second water inlet and the second water outlet of the pressure control four-face valve are respectively connected to the pure water outlet of the reverse osmosis unit and the three-way pipe.
The reverse osmosis system according to claim 9, wherein a pre-filter is further disposed between the raw water inlet and the pressure-controlled four-face valve, and the tee is further disposed between the faucet and the faucet. Rear filter.