A split flow balancing valve

Abstract

The application relates to a shunt balance valve, which comprises a shell, a pure water outlet, a pure water inlet and a backflow port arranged on the shell, a water outlet cavity arranged in the shell, a water overflow diaphragm arranged in the water outlet cavity, the water overflow diaphragm can separate the water outlet cavity into a first water outlet cavity and a second water outlet cavity, the first water outlet cavity is communicated with the pure water outlet, the second water outlet cavity is respectively communicated with the backflow port and the pure water inlet, and a first water passing hole for communicating the first water outlet cavity and the second water outlet cavity is arranged on the water overflow diaphragm. The above scheme can realize that the pure water is kept under pressure and backflow, the pressure of the backflow is lower than the shutdown pressure of the pure water machine, the water outlet amount can be ensured during water pumping, the excess pure water is backflowed, when the water pumping is stopped, the backflow is closed and the pure water machine is stopped by using the pure water pressure, and the backflow amount can be automatically adjusted to meet the use of the pure water machine with different pure water fluxes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water supply, in particular to a shunt balance valve. BACKGROUND

[0002] The heating water supply system of general water tankless instant pipeline machine includes water tankless instant pipeline machine and large flux water tankless pure water machine, the pure water flux of large flux water tankless storage tank pure water machine is generally greater than 1L / min, the instant pipeline machine is usually 350-400ml / min in the out hot water due to power limit, the stop action of pure water machine is controlled by pressure switch, due to the water supply quantity is greater than demand, the excess pure water has no place to overflow limit, the water outlet pressure of pure water machine is once higher than the pressure of pure water machine pressure switch off action, will make pure water machine stop, with the instant pipeline machine constantly carries out pumping operation, the water outlet pressure of pure water machine is lower than the pressure of pure water machine pressure switch off action, pure water machine is started again, this will lead to pure water machine cannot work normally (frequent start, stop).

[0003] Therefore, it is necessary to design a shunt balance valve, which can be used between water tankless instant pipeline machine and large flux water tankless pure water machine, in the process of pipeline machine pumping, pure water machine supplies water to pipeline machine, and excess pure water flows back to the water inlet end of pure water machine, when the pipeline machine stops pumping, the backflow is closed by using pure water pressure and the pure water machine stops working, and when the same pipeline machine is used with pure water machines of different pure water flux, the backflow can be automatically adjusted to avoid frequent start and stop. SUMMARY

[0004] The present application overcomes the shortcomings of the prior art and provides a shunt balance valve, which can realize pure water backflow under pressure, the pressure of backflow under pressure is lower than the stop pressure of pure water machine, in the process of pumping, the water supply can be ensured, and excess pure water flows back, when pumping stops, the backflow is closed by using pure water pressure and the pure water machine stops working, and the backflow can be automatically adjusted to meet the use of pure water machines of different pure water flux.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is: a shunt balance valve, comprising a shell, the shell is provided with a pure water outlet, a pure water inlet and a backflow port, the shell is provided with a water outlet cavity, the shell is provided with an overflow diaphragm in the water outlet cavity, the overflow diaphragm can separate the water outlet cavity into a first water outlet cavity and a second water outlet cavity, the first water outlet cavity is communicated with the pure water outlet, the second water outlet cavity is communicated with the backflow port and the pure water inlet respectively, the overflow diaphragm is provided with a first water passing hole for communicating the first water outlet cavity and the second water outlet cavity, when the pure water outlet has no water, the overflow diaphragm blocks the backflow port; when the pure water outlet has water, the pressure of the first water outlet cavity is reduced, the overflow diaphragm moves away from the backflow port under the action of water pressure, and the backflow port is opened; when the water inflow of the pure water inlet increases, the overflow diaphragm moves away from the backflow port under the action of pressure, the opening degree of the backflow port increases, and the backflow amount increases; when the water inflow of the pure water inlet decreases, the overflow diaphragm moves close to the backflow port under the action of pressure, the opening degree of the backflow port decreases, and the backflow amount decreases.

[0006] By adopting the above scheme, in actual application, the shunt balance valve is used in combination with a negative pressure valve and a pressure reducing valve, the pure water outlet is connected with a pipeline machine through the negative pressure valve, the water pumping of the pipeline machine can open the negative pressure valve, the pure water outlet has water, the water flows into the pipeline machine through the negative pressure valve, the water pumping amount of the pipeline machine determines the opening degree of the negative pressure valve, thereby determining the water amount of the pure water outlet, the water passing flux of the negative pressure valve is slightly larger than the first water passing hole flux, when the negative pressure valve has water, the overflow diaphragm can be reliably lifted, the pure water inlet is connected with the water outlet end of a pure water machine, the backflow port is connected with the water inlet end of the pure water machine through the pressure reducing valve, the outlet pressure of the pressure reducing valve is set to be lower than the shutdown pressure of the pure water machine, the backflow port is connected with the water outlet end of the pressure reducing valve, a one-way valve needs to be arranged between the backflow port and the pressure reducing valve, so as to prevent tap water from entering the pure water area, the pure water backflow has a certain pressure, so that the water pressure of the water inlet end of the pure water machine is lower than the shutdown pressure of the pure water machine, and the pure water backflow is more smooth,

[0007] I. When the second water outlet cavity has water pressure and the pure water outlet has no water, the water flow passes through the first water passing hole to balance the pressure of the first water outlet cavity and the second water outlet cavity, the pressure receiving area of the overflow diaphragm close to the first water outlet cavity is larger than the pressure receiving area of the overflow diaphragm close to the second water outlet cavity, the overflow diaphragm blocks the backflow port, and the pure water machine is in standby state;

[0008] II. When the external pipeline machine pumps water, the pure water outlet has water, the pressure of the first water outlet cavity is reduced, the pressure of the second water outlet cavity is greater than that of the first water outlet cavity, the overflow diaphragm moves away from the backflow port under the action of pressure, and the backflow port is opened; at this time, the pressure of the second water outlet cavity is reduced, the pure water machine starts water production work, the pure water flows into the first water outlet cavity through the first water passing hole, and flows out from the pure water outlet; when the pure water supply amount is greater than the water pumping amount of the pipeline machine, the excess water amount backflows through the backflow port, and the water pressure of the second water outlet cavity is lower than the shutdown pressure of the pure water machine during backflow, so that the pure water machine does not stop.

[0009] Three, when the pipeline machine pumping more, pure water outlet water, the first water chamber pressure is less than the pressure of the second water chamber, because the first water hole has a certain resistance, overflow diaphragm to away from the direction of the reflux port expansion and movement, although the opening of the reflux port increases, but the reflux port has a certain pressure, pure water backflow or even no backflow;

[0010] Four, when the pipeline machine pumping less, pure water outlet water, the first water chamber pressure rises, overflow diaphragm automatically to the direction of the reflux port expansion and movement, at this time the reflux port is still in the open state, the excess water can still be backflow through the reflux port;

[0011] Five, when the external pipeline machine stops pumping, pure water outlet no water, the first water chamber pressure rises, overflow diaphragm automatically to the direction of the reflux port expansion and movement, and close the reflux port, the pressure of the second water chamber rises to the shutdown pressure of the pure water machine, the pure water machine stops working;

[0012] Six, when the same pipeline machine is used with different pure water flux pure water machine, because the water yield of the pipeline machine is constant, at this time when the large pure water flux pure water machine is used, the water inlet flow of the pure water inlet increases, the overflow diaphragm is away from the reflux port under the action of pressure, the opening of the reflux port increases, the reflux increases; when the small pure water flux pure water machine is used, the water inlet flow of the pure water inlet decreases, the overflow diaphragm is close to the reflux port under the action of pressure, the opening of the reflux port decreases, the reflux decreases, and the reflux can be automatically adjusted;

[0013] Seven, when the water pump of a single pipeline machine pumps water, the opening of the reflux port has met the excess pure water backflow, the water pressure of the second water chamber is lower than the shutdown pressure of the pure water machine, and the pure water machine will not stop;

[0014] It can realize the backflow of pure water under pressure, the pressure of the backflow under pressure is lower than the shutdown pressure of the pure water machine, in the process of pumping, the water yield can be guaranteed, the excess pure water can be backflowed, when the pumping is stopped, the reflux is closed by using the pure water pressure and the pure water machine is stopped working, and the reflux can be automatically adjusted to meet the use of pure water machines with different pure water flux.

[0015] The further setting of the application is that the first water hole is provided with a flow regulating assembly, the flow regulating assembly comprises a flow regulating column, the flow regulating column is fixedly arranged in the water outlet chamber, the end of the flow regulating column is inserted into the first water hole, and the outer side wall of the flow regulating column and the inner wall of the first water hole form a water flow channel. With the increase of the water flow of the pure water outlet, the pressure difference between the first water chamber and the second water chamber becomes larger, the overflow diaphragm gradually moves away from the reflux port, the water flow of the first water hole gradually becomes larger, and the water yield is increased.

[0016] Through the above scheme, the size of the first water passing hole determines the water passing amount, when the overflow diaphragm gradually moves away from the backflow port, the straightening column gradually leaves the first water passing hole, the size of the first water passing hole gradually increases, thereby the water passing amount of the first water passing hole gradually increases; when the overflow diaphragm gradually moves close to the backflow port, the straightening column gradually inserts into the first water passing hole, the size of the first water passing hole gradually decreases, thereby the water passing amount of the first water passing hole gradually decreases, during the process of pumping water by the pipeline machine, the water output can be automatically adjusted according to the water pumping amount,

[0017] I. The water output of the pure water outlet is determined by the water pumping pump and the negative pressure valve of the pipeline machine, the larger the water pumping amount is, the larger the opening degree of the negative pressure valve is, the larger the water output of the pure water outlet is, the overflow diaphragm moves and stretches in the direction away from the backflow port under the pressure, the size of the first water passing hole increases, thereby the water passing amount of the first water passing hole increases, and the overflow diaphragm reaches the balance state; at this time, although the opening degree of the backflow port increases, the backflow port has a certain pressure, and the pure water has little backflow or even no backflow;

[0018] II. When the water pumping pump of the pipeline machine pumps less water, the opening degree of the negative pressure valve is smaller, the water output of the pure water outlet is smaller, the pressure of the first water outlet cavity increases, the overflow diaphragm automatically moves and stretches in the direction close to the backflow port, the size of the first water passing hole decreases, thereby the water passing amount of the first water passing hole decreases, and the overflow diaphragm reaches the balance state, at this time, the backflow port is still in the open state, and the excess water amount backflows through the backflow port;

[0019] III. When the pure water outlet is connected with multiple pipeline machines through the negative pressure valve, and the water pumps of the multiple pipeline machines pump water, the opening degree of the negative pressure valve increases, the water output of the pure water outlet increases, the overflow diaphragm automatically moves and stretches in the direction away from the backflow port, the size of the first water passing hole gradually increases, thereby the water passing amount of the first water passing hole increases, the opening degree of the backflow port increases, the backflow is automatically reduced or even no backflow, thereby the working condition of the one-drag-many pipeline machines is met.

[0020] Further provided in the application is that the overflow diaphragm is fixedly connected with an overflow framework, the overflow framework is located on the side of the overflow diaphragm away from the backflow port, the side of the overflow framework facing the overflow diaphragm is provided with a convex column, the convex column penetrates through the overflow diaphragm, and the first water passing hole is arranged on the convex column, and the size of the first water passing hole gradually increases from the end away from the straightening column to the end close to the straightening column.

[0021] Through the above scheme, the overflow diaphragm is connected and matched with the overflow framework, and since the size of the first water passing hole gradually increases from the end away from the straightening column to the end close to the straightening column, when the overflow diaphragm moves and stretches in the direction away from the backflow port, the water passing channel increases, and the water passing amount increases, and the structure is simple and reasonable.

[0022] A further feature of the present invention is that: a rectifier plate is fixedly installed on the outer shell at the second water outlet cavity, the rectifier column is fixedly or integrally installed on the rectifier plate, and a second water passage hole for water supply is provided on the rectifier plate.

[0023] By adopting the above scheme, multiple first water passage holes can be set on the overflow diaphragm, and multiple rectifier columns are set on the corresponding rectifier plate. The rectifier plate will not affect the water flow, and the structure is simple and the design is reasonable.

[0024] A further feature of the present invention is that it includes a return spring, which is placed at the first water outlet cavity. One end of the return spring abuts against the inner wall of the first water outlet cavity, and the other end of the return spring abuts against the overflow frame. The return spring can drive the overflow diaphragm to extend and retract towards the side closer to the return port.

[0025] By adopting the above solution, the return spring plays the role of assisting the overflow diaphragm in returning to its original position, ensuring stable installation and a reasonable design.

[0026] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0029] Figure 3 for Figure 2 A magnified structural diagram of part A;

[0030] Figure 4 This is a schematic diagram of the rectifier plate structure;

[0031] Figure 5 This is a schematic diagram of a single water pump pumping water.

[0032] Figure 6 This is a schematic diagram showing the pumping status of multiple water pumps. Detailed Implementation

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] like Figures 1-6As shown, a shunt balance valve includes a housing 1, the housing 1 is provided with a pure water outlet 11, a pure water inlet 12 and a backflow port 13, the housing 1 is provided with a water outlet cavity, the housing 1 is provided with an overflow diaphragm 2 in the water outlet cavity, the edge sealing part of the overflow diaphragm 2 can adopt radial interference sealing or axial compression sealing, the overflow diaphragm 2 can separate the water outlet cavity into a first water outlet cavity 141 and a second water outlet cavity 142, the first water outlet cavity 141 is communicated with the pure water outlet 11, the second water outlet cavity 142 is communicated with the backflow port 13 and the pure water inlet 12 respectively, the overflow diaphragm 2 is provided with a first water passing hole 311 for communicating the first water outlet cavity 141 and the second water outlet cavity 142, when the pure water outlet 11 has no water outlet, the overflow diaphragm 2 blocks the backflow port 13; when the pure water outlet has water outlet, the pressure of the first water outlet cavity 141 decreases, the overflow diaphragm 2 moves in the direction away from the backflow port 13 under the action of water pressure, and the backflow port 13 is opened; when the water inflow of the pure water inlet 12 increases, the overflow diaphragm 2 moves away from the backflow port 13 under the action of pressure, the opening degree of the backflow port 13 increases, and the backflow increases; when the water inflow of the pure water inlet 12 decreases, the overflow diaphragm 2 moves close to the backflow port 13 under the action of pressure, the opening degree of the backflow port 13 decreases, and the backflow decreases.

[0035] In the embodiment, a flow regulating assembly for adjusting the water passing flow of the first water passing hole 311 is further included, the flow regulating assembly includes a flow regulating column 41, the flow regulating column 41 is fixedly arranged in the water outlet cavity, the end of the flow regulating column 41 is inserted into the first water passing hole 311, and the outer side wall of the flow regulating column 41 and the inner wall of the first water passing hole 311 form a water passing channel 312, as the water outlet flow of the pure water outlet 11 increases, the pressure difference between the first water outlet cavity 141 and the second water outlet cavity 142 becomes larger, the overflow diaphragm 2 gradually moves away from the backflow port 13, and the water passing flow of the first water passing hole 311 gradually becomes larger, thereby increasing the water outlet flow.

[0036] In the embodiment, the overflow diaphragm 2 is fixedly connected with an overflow framework 3, the fixing mode can be clamping or inserting, the overflow framework 3 is located at the side of the overflow diaphragm 2 away from the backflow port 13, the side of the overflow framework 3 facing the overflow diaphragm 2 is provided with a convex column 31, the convex column 31 penetrates through the overflow diaphragm 2, and the first water passing hole 311 is arranged on the convex column 31, the diameter of the first water passing hole 311 gradually increases from the end away from the flow regulating column 41 to the end close to the flow regulating column 41.

[0037] In the embodiment, the housing 1 is fixedly provided with a flow regulating plate 4 at the second water outlet cavity 142, the flow regulating column 41 is fixedly or integrally arranged on the flow regulating plate 4, and the flow regulating plate 4 is provided with a second water passing hole 42 for water flow. Of course, the flow regulating column 41 can also be directly fixedly or integrally arranged on the housing 1.

[0038] In the embodiment, the return spring 5 is arranged at the first water outlet cavity 141, one end of the return spring 5 is arranged against the inner wall of the first water outlet cavity 141, and the other end of the return spring 5 is arranged against the overflow skeleton 3, and the return spring 5 can drive the overflow diaphragm 2 to move towards the side close to the backflow port 13. Of course, the return spring can not be used, and the overflow diaphragm is in a deformed state when assembled, and the deformed return force of the overflow diaphragm can drive the overflow diaphragm to move towards the side close to the backflow port.

[0039] Working principle:

[0040] I. When the second water outlet cavity 142 has water pressure, the pure water outlet 11 has no water outlet, the water flow passes through the first water passing hole 311 to balance the pressure of the second water outlet cavity 142 and the first water outlet cavity 141, the pressure receiving area of the overflow diaphragm 2 close to the first water outlet cavity 141 is greater than the pressure receiving area of the overflow diaphragm 2 close to the second water outlet cavity 142, the overflow diaphragm 2 blocks the backflow port 13, and the pure water machine is in standby state;

[0041] II. When the external pipeline machine pumps water, the pure water outlet 11 has water outlet, the pressure of the first water outlet cavity 141 is reduced, the pressure of the second water outlet cavity 142 is greater than that of the first water outlet cavity 141, the overflow diaphragm 2 moves away from the backflow port 13, and the backflow port 13 is opened. At this time, the pressure of the second water outlet cavity 142 is reduced, the pure water machine starts to work, the pure water flows into the first water outlet cavity 141 through the first water passing hole 311, and flows out from the pure water outlet 11. When the pure water supply is greater than the pumping capacity of the pipeline machine, the excess water flows back through the backflow port 13, and the water pressure of the second water outlet cavity 142 is lower than the shutdown pressure of the pure water machine, so the pure water machine will not stop;

[0042] III. The water outlet capacity of the pure water outlet 11 is determined by the pumping capacity of the external pipeline machine and the negative pressure valve. The greater the pumping capacity, the greater the opening degree of the external negative pressure valve, and the greater the water outlet capacity of the pure water outlet 11. The pressure of the first water outlet cavity 141 is less than that of the second water outlet cavity 142. Due to the certain resistance of the first water passing hole 311, the overflow diaphragm 2 moves away from the backflow port 13, the diameter of the first water passing hole 311 increases, the pure water flow increases, and the balance is automatically reached. At this time, although the opening degree of the backflow port 13 increases, the backflow port 13 has a certain pressure, and the pure water has little backflow or even no backflow.

[0043] Four, when the external pipeline machine pump pumping less, the opening of the external negative pressure valve is smaller, the water outlet 11 of the pure water outlet is smaller, the first water outlet chamber 141 pressure rises, the overflow diaphragm 2 automatically stretches and contracts to the direction of the close return port 13, the first water hole 311 diameter becomes smaller, the amount of pure water through the first water hole 311 becomes smaller, the overflow diaphragm 2 reaches the balance state, at this time the return port 13 is still in the open state, the excess water through the return port 13 backflow, the second water outlet chamber 142 water pressure is lower than the shutdown pressure of the pure water machine, the pure water machine will not stop;

[0044] Five, when the external pipeline machine pump stops pumping, the external negative pressure valve is closed, the pure water outlet 11 has no water, the first water outlet chamber 141 pressure rises, the overflow diaphragm 2 automatically stretches and contracts to the direction of the close return port 13, and closes the return port 13, the pressure of the second water outlet chamber 142 rises to the shutdown pressure of the pure water machine, and the pure water machine stops working;

[0045] Six, when a single water pump pumps, the opening of the return port 13 has met the excess pure water backflow; when the pure water outlet 11 is connected with multiple pipeline machines through the external negative pressure valve, the opening of the external negative pressure valve increases, the water outlet of the pure water outlet 11 increases, the overflow diaphragm 2 automatically stretches and contracts to the direction away from the return port 13, the diameter of the first water hole 311 gradually increases, thereby increasing the water flow of the first water hole 311, the opening of the return port 13 increases, and there is the pressure of the return port 13, the backflow is automatically reduced or even not backflow, thereby meeting the use condition of the one-dragging multiple pipeline machines.

[0046] The above examples are only preferred specific embodiments of the present application, and the usual changes and replacements made by those skilled in the art within the technical solution range of the present application are all included in the protection scope of the present application.

Claims

1. A split flow balancing valve comprising a housing, characterized by: The shell is provided with a pure water outlet, a pure water inlet and a backflow port, and an outlet cavity is arranged in the shell. An overflow diaphragm is arranged in the outlet cavity. The edge sealing part of the overflow diaphragm can adopt a radial interference seal or an axial compression seal. The overflow diaphragm can separate the outlet cavity into a first outlet cavity and a second outlet cavity. The first outlet cavity is in communication with the pure water outlet, and the second outlet cavity is in communication with the backflow port and the pure water inlet, respectively. A first water passing hole for communicating the first outlet cavity and the second outlet cavity is arranged on the overflow diaphragm. When the pure water outlet has no water outlet, the overflow diaphragm blocks the backflow port. When the pure water outlet has water outlet, the pressure of the first outlet cavity decreases, and the overflow diaphragm moves away from the backflow port under the action of water pressure, thereby opening the backflow port. When the water inlet flow of the pure water inlet increases, the overflow diaphragm moves away from the backflow port under the action of pressure, the opening degree of the backflow port increases, and the backflow increases. When the water inlet flow of the pure water inlet decreases, the overflow diaphragm moves close to the backflow port under the action of pressure, the opening degree of the backflow port decreases, and the backflow decreases.

2. A split-balance valve according to claim 1, characterized in that: The flow regulating assembly for adjusting the water passing flow of the first water passing hole is further included. The flow regulating assembly includes a flow regulating column which is fixedly arranged in the outlet cavity. The end of the flow regulating column is inserted into the first water passing hole. The water passing channel is formed between the outer side wall of the flow regulating column and the inner wall of the first water passing hole. As the water outlet flow of the pure water outlet increases, the pressure difference between the first outlet cavity and the second outlet cavity increases, the overflow diaphragm gradually moves away from the backflow port, and the water passing flow of the first water passing hole gradually increases, thereby increasing the water outlet flow.

3. A split-balance valve according to claim 2, wherein: The overflow diaphragm is fixedly connected with an overflow framework. The overflow framework is located on the side of the overflow diaphragm away from the backflow port. The side of the overflow framework facing the overflow diaphragm is provided with a convex column which penetrates through the overflow diaphragm. The first water passing hole is arranged on the convex column. The diameter of the first water passing hole gradually increases from the end away from the flow regulating column to the end close to the flow regulating column.

4. A split-balance valve according to claim 2 or 3, characterised in that: The shell is fixedly provided with a flow regulating plate at the second outlet cavity. The flow regulating column is fixedly or integrally arranged on the flow regulating plate. The flow regulating plate is provided with a second water passing hole for water flow.

5. A split-balance valve according to claim 3, wherein: The reset spring is further included. The reset spring is arranged at the first outlet cavity. One end of the reset spring abuts against the inner wall of the first outlet cavity, and the other end of the reset spring abuts against the overflow framework. The reset spring can drive the overflow diaphragm to move away from or close to the backflow port.

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