Waterway control valve

Abstract

The utility model discloses a waterway control valve which comprises a valve element assembly and a flush valve body with a first water inlet and a first water outlet, a first water passing hole is formed between the first water inlet and the first water outlet, and the valve element assembly comprises a first floating body used for opening and closing the first water passing hole. The two sides of the first floating body are a water inlet side and a balance cavity side respectively, the first floating body is provided with a balance hole channel, a non-return piece with a one-way water passing function is arranged in the balance hole channel, and the non-return piece is movably arranged in the balance hole channel so as to be used for opening and closing communication between the water inlet side and the balance cavity side. By means of the non-return piece which is arranged in the balance hole channel and has the one-way water passing function, the anti-siphon function is achieved, under the cooperation of the valve element assembly, water at the first water inlet is drained quickly, the maximum instantaneous flow can be achieved in a short time, and flushing and water saving can be achieved; rapid descending and slow closing can be achieved, destructive water hammers can be prevented, and noise is reduced; and meanwhile, the uniformity of high-pressure and low-pressure flow is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of control valves, specifically to a water circuit control valve. Background Technology

[0002] Flushing valves are widely used in toilets for controlling the flushing process. Current concealed flushing valves are small, resulting in a small internal water flow chamber. This small size makes it difficult to reach maximum water flow in a short time, and the flushing force remains weak over time, leading to a small maximum instantaneous flow that fails to meet national standards. Furthermore, when the water supply is interrupted or the water pressure is low, the sudden drop in pressure within the pipes can create negative pressure under the influence of external air pressure. This negative pressure can cause water in the toilet's inlet valve to siphon back into the mains water supply, contaminating the mains water pipes. Therefore, current toilet inlet valves typically have an anti-siphon design.

[0003] Currently, most toilets use one of two flushing methods: 1. Using a check valve: The flushing valve directly connects to the water supply. When the water supply is interrupted, backflow may occur, causing water pollution. Although check valves are now installed on the inlet pipe, this structure is installed on a large-diameter inlet pipe, resulting in high overall manufacturing costs. 2. Using a vacuum breaking valve: Such as the Chinese invention patent (application number: 201810734440.8, invention name: vacuum breaker for preventing siphoning under negative pressure). Its overall structure is more complex, the manufacturing cost is high, it is difficult to assemble, and the yield rate is low.

[0004] In view of this, the inventors of this case conducted in-depth research on the above-mentioned problems, which led to the creation of this case. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a water circuit control valve.

[0006] To achieve the above objectives, this utility model adopts the following technical solution:

[0007] A water circuit control valve, installed in a concealed box, includes a flushing valve body having a first inlet and a first outlet, and a valve core assembly disposed within the flushing valve body. A first water passage is formed between the first inlet and the first outlet. The valve core assembly includes a first float for opening and closing the first water passage. One side of the first float is the inlet side, and the other side is the balance chamber side. A balance channel is provided on the first float to connect the inlet side and the balance chamber side. A check valve with a one-way water flow function is disposed within the balance channel. The check valve is movably disposed within the balance channel to open and close the connection between the inlet side and the balance chamber side.

[0008] Preferably, the two ends of the balancing channel have a first limiting member to prevent the anti-reverse member from disengaging from the balancing channel along the inlet side and a second limiting member to prevent the anti-reverse member from disengaging from the balancing channel along the balancing cavity side.

[0009] Preferably, the diameter of the check valve is smaller than the diameter of the balance channel, the end of the check valve facing the inlet is tapered, the end facing the balance cavity is cylindrical, and the end face of the first limiting member that is in contact with the check valve is tapered.

[0010] Preferably, the inlet end of the balancing channel is provided with a filtration device for filtration.

[0011] Preferably, it further includes a flow regulating component for adjusting the water flow rate. One end of the flow regulating component is fixedly connected to the flushing valve body, and the other end extends into the balance channel. The diameter of the flow regulating component is smaller than the diameter of the balance channel. The first float drives the balance channel to slide and engage with the flow regulating component.

[0012] Preferably, the flow regulating component is a frustum-shaped body with a gradually increasing cross-section, the diameter of the flow regulating component gradually increases from one end of the balance chamber to the other end of the inlet, and its outer side wall forms an inclined wall.

[0013] Preferably, the valve also includes a cover fixedly connected to the flushing valve body. The valve core assembly further includes a first sealing member snapped onto the end of the first float facing the balance chamber and a second sealing member snapped onto the end of the first float facing the inlet. The first sealing member is sealed together with the lower surface of the cover to form a water pressure balance chamber, and the outlet end of the balance channel is connected to the water pressure balance chamber.

[0014] Preferably, the flushing valve body is provided with a control switch that controls the connection or disconnection between the first water inlet and the first water outlet, and the connection or disconnection between the first water inlet and the water pressure balance chamber by opening and closing.

[0015] Preferably, the control switch is a solenoid valve with a second inlet and a second outlet. The cover is provided with an inlet channel, an outlet channel, and a guide hole connected to the inlet channel. The guide hole is connected to the water pressure balance chamber. The other end of the inlet channel is connected to the second inlet. The two ends of the outlet channel are respectively connected to the first outlet and the second outlet.

[0016] Preferably, a second water passage is formed between the second water inlet and the second water outlet, and the solenoid valve includes a second float for opening and closing the second water passage, the second float being disposed below the second water passage.

[0017] By adopting the aforementioned design scheme, the beneficial effects of this utility model are:

[0018] 1. With the help of the check valve with one-way water flow function in the balance channel, the water in the first inlet is discharged quickly and can reach the maximum instantaneous flow in a short time, which can both clean and save water.

[0019] 2. The check valve with one-way water flow function has an anti-siphon function;

[0020] 3. The filter screen can remove impurities from tap water;

[0021] 4. After the valve core assembly slides together, the balance channel and the flow regulating component slide up and down to adjust the flow channel opening. The flow regulating component makes the water flow smoothly. Moreover, when the structure is closed, it can achieve rapid descent and slow closure, which can prevent destructive water hammer and reduce noise. At the same time, it can adjust the uniformity of high and low pressure flow. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This utility model Figure 1 A cross-sectional view of AA under siphon conditions generated by the inlet valve;

[0024] Figure 3 This utility model Figure 1 A cross-sectional view of AA with the water inlet valve in the water inlet state;

[0025] Figure 4 This utility model Figure 1 A cross-sectional view of BB in the siphon state generated by the inlet valve;

[0026] Figure 5 This utility model Figure 4 A magnified view of a section at point A in the middle;

[0027] Figure 6 This utility model Figure 4 A magnified view of a section at point B in the middle;

[0028] Figure 7 This is a partial view of the present invention;

[0029] Figure 8 This is a partial view of the present invention from another angle;

[0030] In the diagram: 1. Concealed box; 2. Flushing valve body; 2. First inlet; 21. First outlet; 22. First through hole; 23. Cover; 3. Inlet channel; 31. Outlet channel; 32. Guide hole; 33. First seal; 41. Second seal; 42. First float; 43. Balance channel; 431. First limiter; 432. Second limiter; 433. Check valve; 44. Water pressure balance chamber; 45. Filter screen; 46. Flow regulator; 47. Regulating channel; 471. Solenoid valve; 5. Second inlet; 51. Second outlet; 52. Second through hole; 53. Second float; 54. Top cover; 6. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1 to 8

[0033] A water circuit control valve is installed in a concealed box 1. It includes a cover 3, a flushing valve body 2 having a first water inlet 21 and a first water outlet 22, and a valve core assembly disposed in the flushing valve body 2. A first water passage hole 23 is formed between the first water inlet 21 and the first water outlet 22. The cover 3 is disposed above the valve core assembly and the first water passage hole 23. The cover 3 is fixedly connected to the flushing valve body 2 by screws.

[0034] The valve core assembly includes a first seal 41, a second seal 42, and a first float 43 for opening and closing the first water passage 23. One side of the first float 43 is the water inlet side, and the other side is the balance chamber side. The first seal 41 is engaged with the end of the first float 43 facing the balance chamber side, and the second seal 42 is engaged with the end of the first float 43 facing the water inlet side. It is worth noting that in this embodiment, the first seal 41 is a U-shaped rubber gasket. The first seal 41 can also be a straight rubber gasket or an L-shaped rubber gasket, but in terms of sealing effect, the U-shaped rubber gasket has a better sealing effect. The second seal 42 is a rubber gasket.

[0035] The first float 43 is provided with a balance channel 431 connecting the inlet side and the balance chamber side. A check valve 44 with one-way water flow function is provided in the balance channel 431. The check valve 44 is movably disposed in the balance channel 431 to open and close the connection between the inlet side and the balance chamber side. The first sealing member 41 is sealed to the lower surface of the cover 3 to form a water pressure balance chamber 45. The outlet end of the balance channel 431 is connected to the water pressure balance chamber 45.

[0036] Furthermore, the two ends of the balancing channel 431 have a first limiting member 432 to prevent the anti-reverse member 44 from disengaging from the balancing channel 431 along the inlet side and a second limiting member 433 to prevent the anti-reverse member 44 from disengaging from the balancing channel 431 along the balancing cavity side.

[0037] Specifically, the diameter of the check valve 44 is smaller than the diameter of the balance channel 431. The end of the check valve 44 facing the water inlet is tapered, and the end facing the balance cavity is cylindrical. The first limiting member 432 is provided with a tapered surface that fits against the tapered check valve 44. After the solenoid valve 5 (described in detail later) is operated, water from the tap water pipe flows in from the first water inlet 21. The water pressure moves the valve core assembly from the water inlet side to the balance cavity side, thereby opening the first water passage 23. This allows water from the tap water pipe to flow from the first water inlet 21 to the first water outlet 22 connected to the toilet water pipe, thus achieving flushing.

[0038] Furthermore, a filter device for filtration is provided at the water inlet end of the balance channel 431. In this embodiment, the filter device can be a filter screen 46. Since tap water usually contains impurities, the filter screen 46 can filter them. When the water flows through the balance channel 431 and enters the solenoid valve 5, the impurities are filtered out by the filter screen 46.

[0039] Furthermore, this embodiment also includes a flow regulating component 47 for adjusting the water flow rate. One end of the flow regulating component 47 is fixedly connected to the flushing valve body 2, and the other end extends into the balance channel 431. The diameter of the flow regulating component 47 is smaller than the diameter of the balance channel 431. The first float 43 drives the balance channel 431 to slide and engage with the flow regulating component 47.

[0040] The flow regulating element 47 is a frustum-shaped cone with a gradually increasing cross-section. The diameter of the flow regulating element 47 gradually increases from the end on the balance chamber side to the end on the inlet side, and its outer wall forms an inclined wall. When the solenoid valve 5 is opened, the valve core assembly moves from the inlet side to the balance chamber side, forming a regulating flow channel 471 between the balance channel 431 and the inclined wall of the flow regulating element 47. Water flows through the balance channel 431 and the regulating flow channel 471 to regulate the opening degree of the flow regulating element 47. Since the flow rate and pressure are limited by the distance between the balance channel 431 and the inclined wall of the flow regulating element 47 (i.e., the width of the regulating flow channel 471), the gradually increasing cross-section of the flow regulating element 47 allows for rapid descent and slow closure when closed, preventing destructive water hammer and reducing noise.

[0041] Furthermore, the flushing valve body 2 is equipped with a control switch that controls the connection or disconnection between the first inlet 21 and the first outlet 22, and between the first inlet 21 and the water pressure balance chamber 45. The control switch is a solenoid valve 5 with a second inlet 51 and a second outlet 52. It is worth noting that the solenoid valve 5 in this embodiment can be a control valve such as that in Chinese Utility Model Patent (application number 201510570282.3, utility model name: a water circuit control valve assembly), which will not be described in detail here.

[0042] The cover 3 is provided with a top cover 6 fixedly connected by screws. A water inlet channel 31, a water outlet channel 32 and a guide hole 33 connected to the water inlet channel 31 are formed between the cover 3 and the top cover 6. The other end of the water inlet channel 31 is connected to the second water inlet 51. The two ends of the water outlet channel 32 are connected to the first water outlet 22 and the second water outlet 52, respectively.

[0043] Preferably, a second water passage hole 53 is formed between the second inlet 51 and the second outlet 52, and the solenoid valve 5 includes a second float 54 for opening and closing the second water passage hole 53 (application number 201510570282.3, utility model name: valve core kit 2 in a water circuit control valve assembly). When the solenoid valve 5 is opened, the second float 54 moves downward, and the water from the second inlet 51 flows directly to the second outlet 52.

[0044] Of course, the solenoid valve 5 in this embodiment also includes a water inlet channel, a second water pressure balance chamber, an iron core sealing rubber, a pressure relief nozzle, a drainage channel, a pressure relief nozzle, a pressure relief hole, a pressure relief water flow channel, a bushing, and a flow passage, etc. The structure and function of these components will not be described in detail here.

[0045] Therefore, the water circuit connection relationship in this utility model is as follows: the first water inlet 21 is connected to the water pressure balance chamber 45 through the balance channel 31, the water pressure balance chamber 45 is connected to the water inlet channel 31 through the guide hole 33, the water inlet channel 31 is connected to the second water inlet 52, the second water outlet 52 is connected to the first water outlet 22, the first water inlet 21 is not connected to the first water outlet 22 through the valve core assembly, and the second water inlet 51 is not connected to the second water outlet 52 through the second float 54.

[0046] When the solenoid valve 5 is opened, the valve body assembly and the check valve 44 rise respectively, and the water in the first inlet 21 flows from the first through hole 23 to the first outlet 22, thus fully opening the large water circuit for flushing; (the iron core sealing rubber in the solenoid valve 5 disengages from the pressure relief nozzle, the drainage channel is open, and the water in the water pressure balance chamber flows into the drainage channel in the pressure relief nozzle through the guide hole on the diaphragm cover, then flows sequentially through the drainage channel to the pressure relief hole and the pressure relief water flow channel, and then flows through the pressure relief water flow channel...) The water flows through the flow hole of the bushing and finally to the second outlet 52. At this time, due to the pressure relief of the water pressure balance chamber, a significant pressure difference is formed between the pressure of the water pressure balance chamber and the inlet pressure. The pressure in the water pressure balance chamber is less than the inlet pressure of the second inlet 51. Driven by the inlet pressure, the second float 54 moves downward, connecting the second inlet 51 and the second outlet 52, thus fully opening the small water passage. (See application number 201510570282.3 for details of this usage.)

[0047] When solenoid valve 5 is closed, the solenoid valve core rises, and the sealing rubber of the core blocks the drainage channel of the pressure relief nozzle. At the same time, a small portion of water flows into the water pressure balance chamber through the inlet channel to increase the pressure. The water in the water pressure balance chamber has nowhere to drain, and the pressure in the water pressure balance chamber gradually increases, gradually pushing the second float 54 upward until it closes the second inlet 52. At the same time, the water in the water pressure balance chamber 45 has nowhere to drain, and the pressure in the water pressure balance chamber 45 gradually increases, gradually pushing the valve core assembly and check valve 44 downward until it closes the first inlet 21, thus achieving the purpose of closing the water circuit.

[0048] By adopting the aforementioned design scheme, the beneficial effects of this utility model are:

[0049] 1. By installing a check valve 44 with a one-way water flow function in the balance channel 431, the water in the first inlet 21 is discharged quickly with the cooperation of the valve core assembly, and can reach the maximum instantaneous flow in a short time, which can both clean and save water.

[0050] 2. The check valve 44, which has a one-way water flow function, has an anti-siphon function;

[0051] 3. Filter screen 46 can filter out impurities from tap water;

[0052] 4. After the valve core assembly slides together, the balance channel 431 and the flow regulating component 47 slide together up and down to adjust the opening of the flow channel 471. The flow regulating component 47 makes the water flow smoothly. Moreover, when the structure is closed, it can achieve rapid descent and slow closure, which can prevent the generation of destructive water hammer and reduce noise. At the same time, it can adjust the uniformity of high and low pressure flow.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water circuit control valve, installed in a concealed box, comprising a flushing valve body having a first inlet and a first outlet, and a valve core assembly disposed within the flushing valve body, wherein a first water passage hole is formed between the first inlet and the first outlet, characterized in that: The valve core assembly includes a first float for opening and closing the first water passage. One side of the first float is the water inlet side, and the other side is the balance chamber side. The first float is provided with a balance channel connecting the water inlet side and the balance chamber side. A check valve with a one-way water flow function is provided in the balance channel. The check valve is movably disposed in the balance channel to open and close the connection between the water inlet side and the balance chamber side.

2. A water circuit control valve according to claim 1, characterized in that: The two ends of the balancing channel have a first limiting member to prevent the anti-reverse component from disengaging from the balancing channel along the inlet side and a second limiting member to prevent the anti-reverse component from disengaging from the balancing channel along the balancing cavity side.

3. A water circuit control valve according to claim 2, characterized in that: The diameter of the anti-reverse component is smaller than the diameter of the balance channel. The end of the anti-reverse component facing the water inlet is tapered, and the end facing the balance cavity is cylindrical. The end face of the first limiting component that is in contact with the anti-reverse component is tapered.

4. A water circuit control valve according to claim 1, characterized in that: The inlet end of the balance channel is equipped with a filtration device for filtration.

5. A water circuit control valve according to claim 1, characterized in that: It also includes a flow regulating component for adjusting water flow rate. One end of the flow regulating component is fixedly connected to the flushing valve body, and the other end extends into the balance channel. The diameter of the flow regulating component is smaller than the diameter of the balance channel. The first float drives the balance channel to slide and engage with the flow regulating component.

6. A water circuit control valve according to claim 5, characterized in that: The flow regulating component is a frustum-shaped body with a gradually increasing cross-section. The diameter of the flow regulating component gradually increases from one end of the balance chamber to the other end of the inlet, and its outer side wall forms an inclined wall.

7. A water circuit control valve according to claim 1, characterized in that: It also includes a cover that is fixedly connected to the flushing valve body. The valve core assembly also includes a first sealing member that is engaged at the end of the first float facing the balance chamber and a second sealing member that is engaged at the end of the first float facing the inlet. The first sealing member is sealed together with the lower surface of the cover to form a water pressure balance chamber. The outlet end of the balance channel is connected to the water pressure balance chamber.

8. A water circuit control valve according to claim 7, characterized in that: The flushing valve body is equipped with a control switch that controls the connection or disconnection between the first water inlet and the first water outlet, as well as the connection or disconnection between the first water inlet and the water pressure balance chamber, by opening and closing.

9. A water circuit control valve according to claim 8, characterized in that: The control switch is a solenoid valve with a second inlet and a second outlet. The cover is provided with an inlet channel, an outlet channel and a guide hole connected to the inlet channel. The guide hole is connected to the water pressure balance chamber. The other end of the inlet channel is connected to the second inlet. The two ends of the outlet channel are respectively connected to the first outlet and the second outlet.

10. A water circuit control valve according to claim 9, characterized in that: A second water passage is formed between the second water inlet and the second water outlet. The solenoid valve includes a second float for opening and closing the second water passage, and the second float is disposed below the second water passage.

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