CN212616578U - Water return valve and water supply system - Google Patents
Water return valve and water supply system Download PDFInfo
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- CN212616578U CN212616578U CN202020282969.3U CN202020282969U CN212616578U CN 212616578 U CN212616578 U CN 212616578U CN 202020282969 U CN202020282969 U CN 202020282969U CN 212616578 U CN212616578 U CN 212616578U
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Abstract
The utility model discloses a return valve and water supply system. The water return valve comprises a valve body with a flow channel, a water return one-way valve, a driving piece and an elastic piece, wherein the flow channel comprises a first flow channel, a second flow channel and a third flow channel, the first flow channel and the second flow channel are arranged at intervals, and the third flow channel is communicated with the first flow channel and the second flow channel; the backwater check valve is arranged in a third flow passage and comprises a blocking piece movably arranged in the third flow passage, and the blocking piece is provided with a first position for blocking the third flow passage and a second position for opening the third flow passage; the driving piece is rotatably arranged in the flow passage; the elastic piece is used for enabling the plugging piece to have the tendency of returning to the first position through the driving piece. Thus, a novel water return valve is provided.
Description
Technical Field
The utility model relates to a zero cold water supply technical field, in particular to return valve and water supply system.
Background
The water supply system, such as a water supply system of a water heater or a water supply system of a wall-mounted boiler, is used for providing water for users, and generally comprises a gas heating device (such as a gas water heater or a wall-mounted boiler), a cold water pipe, a hot water pipe, a water mixing device and a water outlet end, wherein the water outlet end is connected with the gas heating device through the cold water pipe, the hot water pipe and the water mixing device.
In the related art, in order to make the water supply system have a zero-cold-water function, a return valve having a return check valve is generally added to the water supply system, and the return valve is connected to a cold water pipe and a hot water pipe to form a return water path in the water supply system. In the above water supply system, the return check valve usually closes the return valve and the return waterway by a compression spring sleeved on the plugging piece.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a new return valve structure.
The utility model provides a return valve, include:
the valve body is provided with a flow passage, and the flow passage comprises a first flow passage, a second flow passage and a third flow passage, wherein the first flow passage and the second flow passage are arranged at intervals, and the third flow passage is communicated with the first flow passage and the second flow passage;
the backwater check valve is arranged in a third flow passage and comprises a plugging piece movably arranged in the third flow passage, and when the plugging piece is positioned at a first position, the backwater check valve closes the third flow passage; when the blocking piece is located at the second position, the backwater check valve opens the third flow passage;
the driving piece is rotatably arranged in the flow channel, the driving piece is positioned on one side of the blocking piece, which faces the second flow channel, and one end of the driving piece is rotatably matched with the blocking piece; and
the one end fixed connection of elastic component in the valve body, the other end of elastic component connect in the other end of driving piece, the elastic component is used for passing through the driving piece makes the shutoff piece has the trend that resets to the first position.
Optionally, the backwater check valve further comprises a valve casing with two open ends, the valve casing is arranged in the third flow passage in a sealing mode, the blocking piece is movably arranged in the valve casing, and in the first position, the blocking piece blocks the valve casing.
Optionally, the internal face of valve casing is equipped with that the sealing ring is protruding, the one end of shutoff piece is equipped with shutoff portion during the first position, shutoff portion shutoff in the sealing ring is protruding, so that shutoff piece shutoff valve casing.
Optionally, the blocking portion includes an insertion portion and an abutting portion, the insertion portion is inserted into the inner side of the sealing ring protrusion in the first position, and the abutting portion abuts against a side portion of the sealing ring protrusion facing the second flow passage.
Optionally, a water passing channel is arranged on the inner wall surface of the valve housing, and in the second position, the water passing channel is communicated with the first flow channel and the second flow channel.
Optionally, the water passing channel is arranged on one side of the sealing ring protrusion facing the second flow channel.
Optionally, the backwater check valve further comprises a valve cover with a water through hole, the valve cover is arranged on an opening of the valve casing close to the second flow channel, a guide support hole is further formed in the valve cover, and the blocking piece is movably arranged in the guide support hole.
Optionally, the valve cover is further provided with a guide ring sleeve located at the periphery of the guide support hole, and the blocking piece is movably arranged in the guide ring sleeve.
Optionally, during the movement of the blocking piece from the first position to the second position, the component force of the acting force of the elastic piece on the driving piece in the movable direction of the blocking piece is gradually reduced.
Optionally, the elastic member is an extension spring.
Optionally, the extension spring is disposed in the second flow channel, a fixing position of the extension spring in the second flow channel and a rotation axis of the driving member are respectively located at two opposite sides of the blocking member, and the rotation axis of the driving member is located at one side of the fixing position, which faces the first flow channel.
Optionally, during the movement of the blocking piece from the first position to the second position, an included angle between the extension spring and the driving piece is gradually reduced; and/or the presence of a gas in the gas,
the plugging piece moves from the first position to the second position, the driving piece rotates for a preset angle, and the preset angle is greater than or equal to 25 degrees and less than or equal to 60 degrees; and/or the presence of a gas in the gas,
the driving piece comprises a rotating portion, and a pressing section and a driving section which are connected to two ends of the rotating portion respectively, the pressing section is rotatably matched with the plugging piece, the driving section is connected with the extension spring, and the length of the pressing section is smaller than that of the driving section.
Optionally, one end of the driver abuts an end of the closure.
Optionally, an abutting recess is formed in a side surface, facing the blocking piece, of the driving piece, and the blocking piece abuts against the abutting recess.
Optionally, the water return valve further includes a mounting seat having a water flowing channel, the mounting seat is installed in the second flow channel, the water flowing channel of the mounting seat is communicated with the third flow channel, the driving member is rotatably installed on the mounting seat, and the elastic member is fixedly connected to the mounting seat.
Optionally, the drive member is rod-shaped; and/or the presence of a gas in the gas,
in the process that the plugging piece moves from the first position to the second position, the component force of the acting force of the elastic piece on the driving piece in the movable direction of the plugging piece is increased firstly and then reduced, or is reduced firstly and then unchanged, or is reduced firstly and then increased.
The utility model discloses still provide a water supply system, include:
a gas heating device;
the water outlet end is connected with the gas heating device through a cold water pipe, a hot water pipe and a water mixing device; and
the water return valve has a first flow passage connected to the hot water pipe and a second flow passage connected to the cold water pipe.
Optionally, the gas heating device is a gas water heater or a gas wall-hanging stove.
The utility model discloses still provide a water supply system, include:
a gas heating device;
the water outlet end is connected with the gas heating device through a cold water pipe, a hot water pipe and a water mixing device;
the water return valve is characterized in that a second flow passage of the water return valve is connected to the cold water pipe; and
and one end of the water return pipe is connected to the hot water pipe, and the other end of the water return pipe is connected to the first flow channel of the water return valve.
The utility model discloses the wet return valve, when the water pressure differential value of first runner and second runner increases to a certain threshold value, water in the first runner can promote the shutoff piece to move to the second position from the primary importance to open the third runner (open the wet return valve promptly), so that water can flow at return water route inner loop, preheat in order realizing circulating the water in hot-water line etc. with realizing zero cold water. After preheating is completed, the elastic piece can drive the driving piece to rotate so as to enable the plugging piece to reset to the first position through the driving piece.
Furthermore, the utility model discloses still can design through factors such as the position to the position of the position, the type of elastic component and the rotation portion of driving piece to open the condition (if drive plugging piece removes required water pressure) to the plugging piece and control, with the suitability that improves the wet return.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of a unified embodiment of the water supply system of the present invention;
FIG. 2 is a schematic structural view of another embodiment of the water supply system of the present invention;
FIG. 3 is a schematic structural view of an embodiment of the water return valve of the present invention; wherein the blocking member is in a first position;
FIG. 4 is a schematic view of the water return valve of FIG. 3 in an open state;
FIG. 5 is a schematic view of the water return valve of FIG. 3 in a fully open state; wherein the blocking member is in the second position;
FIG. 6 shows the tension F of the tension spring during the movement of the block piece from the first position to the second positionTension forceIs shown in exploded schematic view.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that if the embodiments of the present invention are described with reference to "first", "second", etc., the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.
The utility model provides a return valve and water supply system.
As shown in fig. 1 and 2, the water return valve 100 is used in a water supply system 1000, that is, the water supply system 1000 includes the water return valve 100, so that the water supply system 1000 has a zero cold water function, and the water return valve 100 will be described in detail below with reference to the structure of the water supply system 1000. Optionally, the water supply system 1000 is a water heater water supply system 1000 (including but not limited to a gas water heater system) or a wall-hanging stove water supply system 1000, etc.
In an embodiment of the present invention, as shown in fig. 1 and 2, the water supply system 1000 further includes a gas heating device 200, a cold water pipe 300, a hot water pipe 400, a water mixing device 600, a water outlet 700, a water return valve 100, and the like, wherein the water outlet 700 is connected to the gas heating device 200 through the cold water pipe 300, the hot water pipe 400, and the water mixing device 600; the return valve 100 is installed in a water path of the water supply system 1000 to form a return water path for providing the water supply system 1000 with a zero-cold water function.
Specifically, as shown in fig. 1 and 2, the gas heating device 200 has a cold water inlet (not shown) and a hot water outlet (not shown), and the water mixing device 600 has a hot water inlet, a cold water inlet, and a mixed water outlet. Wherein, one end and the cold water inlet of the cold water pipe 300 are both connected (i.e. communicated) with a water supply pipe (such as a tap water pipe, etc.), and the other end of the cold water pipe 300 is communicated with the cold water inlet; one end of the hot water pipe 400 is communicated with the hot water outlet, the other end is communicated with the hot water inlet, and the mixed water outlet is communicated with the water outlet end 700.
Optionally, the gas heating apparatus 200 includes a water inlet pipe 210, the cold water inlet is communicated with the water supply pipe through the water inlet pipe 210, and the cold water pipe 300 is communicated with the water inlet pipe 210.
Optionally, the gas heating apparatus 200 further comprises a water outlet pipe 220, and the hot water outlet is communicated with the hot water pipe 400 through the water outlet pipe 220.
Optionally, the water outlet end 700 may be a shower or a faucet.
Optionally, the water outlet end 700 may be provided in plurality.
Optionally, the mixing device 600 is a mixing valve or other mixing device with similar function to the mixing valve.
Alternatively, the gas heating device 200 is a gas water heater (including but not limited to an instant heating type gas water heater or a thermal storage type gas water heater) or a wall-mounted gas stove, and the gas water heater is taken as an example for description below.
In an embodiment of the present invention, as shown in fig. 3 to 5, the water return valve 100 includes a valve body 10, a water return check valve 20, a driving member 80, and an elastic member 90.
As shown in fig. 3 to 5, the valve body 10 has a flow passage, and the flow passage includes a first flow passage 11 and a second flow passage 12 which are arranged at an interval, and a third flow passage 13 which communicates the first flow passage 11 with the second flow passage 12.
As shown in fig. 3 to 5, the backwater check valve 20 is disposed in the third flow channel 13, the backwater check valve 20 includes a blocking member 21 movably disposed in the third flow channel 13, the blocking member 21 has a first position and a second position, and when the blocking member 21 is located at the first position, the backwater check valve 20 closes the third flow channel 13 (i.e., the backwater check valve 20 is opened); when the blocking piece 21 is located at the second position, the backwater check valve 20 opens the third flow channel 13 (i.e. the backwater check valve 20 is closed). It will be appreciated that the first position is an initial position of the closure 21 and the second position is generally an end position of the closure 21 in its movable direction, the closure 21 being movable within the third flow passage 13 to effect a transition between the first and second positions. And the second position may be selected as an equilibrium position which changes (slightly) when the water pressure balance of the water supply system 1000 changes; of course, in other embodiments, the second position can be set to a fixed position by designing the position-limiting structure.
The backwater check valve 20 is used for allowing the water in the first flow passage 11 to flow to the second flow passage 12 through the third flow passage 13 after the backwater check valve 20 is opened (i.e., when the blocking piece 21 is at the second position), and for preventing the water in the second flow passage 12 from flowing to the first flow passage 11.
As shown in fig. 3 to 5, the driving member 80 is rotatably disposed in the flow passage, the driving member 80 is located on a side of the blocking member 21 facing the second flow passage 12, and one end of the driving member 80 is rotatably engaged with the blocking member 21. In this manner, the movement of the block piece 21 can be driven by rotating the driving member 80.
As shown in fig. 3 to 5, one end of the elastic member 90 is connected to the valve body 10, the other end of the elastic member 90 is connected to the other end of the driving member 80, and the elastic member 90 is used for making the blocking member 21 have a tendency to return to the first position by the driving member 80. Specifically, the elastic element 90 elastically limits the plugging element 21 at the first position through the driving element 80.
In the present embodiment, the second position is located on the side of the first position facing the second flow channel 12.
It will be appreciated that when the difference between the water pressures in the first flow passage 11 and the second flow passage 12 increases to a threshold value (it will be understood that the threshold value may be greater than 0, but 0 is not excluded), the water in the first flow passage 11 will flow into the third flow passage 13 to urge the blocking member 21 to move from the first position to the second position to open the third flow passage 13, so that the water in the first flow passage 11 flows into the second flow passage 12. When the difference between the water pressures in the first flow passage 11 and the second flow passage 12 decreases, the elastic member 90 can drive the driving member 80 to rotate, so that the blocking member 21 is reset to the first position by the driving member 80.
The operation of the return valve 100 will be described in detail below with reference to the structure of the water supply system 1000.
In an embodiment of the water supply system 1000, the water supply system 1000 is not provided with the water return pipe 500; as shown in fig. 1, the first flow channel 11 is connected to a heat exchange pipe, and the second flow channel 12 is connected to a cold water pipe 300. When the outlet end 700 has a plurality of parts, the water return valve 100 is disposed at the most distal outlet end 700.
Specifically, one end of the second flow passage 12 is communicated with a cold water inlet through a cold water pipe 300, and the other end of the second flow passage 12 is communicated with the water inlet pipe 210 through the cold water pipe 300; one end of the first flow passage 11 is communicated with the hot water inlet through a hot water pipe 400, and the other end of the first flow passage 11 is communicated with the hot water outlet through the hot water pipe 400. Thus, a water return waterway may be formed among the water outlet pipe 220, the hot water pipe 400, the first flow passage 11, the third flow passage 13, the second flow passage 12, the cold water pipe 300, the water inlet pipe 210, and the like, i.e., the water return valve 100 is disposed in the water return waterway.
As shown in fig. 1, the gas heating apparatus 200 further includes a water circulating pump 800, the water circulating pump 800 is disposed in the water return waterway, and the water circulating pump 800 is configured to drive water to flow in the water return waterway. Alternatively, as shown in fig. 1, the circulation water pump 800 is disposed between the heat exchanger of the gas heating apparatus 200 and the cold water pipe 300. Further, the water circulation pump 800 is disposed on the water inlet pipe 210, and the water circulation pump 800 is also used for sucking cold water.
Specifically, as shown in fig. 3, when the outlet end 700 uses cold water alone, the cold water flows out from the outlet end 700 through the second flow channel 12 and the mixing valve, and at this time, although the water pressure of the second flow channel 12 decreases, the blocking member 21 is still limited at the first position under the action of the elastic member 90, so as to continuously close the third flow channel 13, so as to prevent the hot water in the first flow channel 11 from flowing from the third flow channel 13 to the second flow channel 12.
When the water supply system 1000 uses the zero-cold-water function for preheating, as shown in fig. 4 and 5, the circulating water pump 800 may push water in the return water channel to flow, so that the water pressure in the first channel 11 is increased, so that the difference between the water pressure in the first channel 11 and the water pressure in the second channel 12 is increased, and when the water pressure difference between the first channel 11 and the second channel 12 is increased to a certain threshold, the water in the first channel 11 may flow into the third channel 13, so as to push the blocking piece 21 to move from the first position to the second position (the blocking piece 21 pushes the driving piece 80 to rotate, and the driving piece 80 drives the elastic piece 90 to elastically move), so as to open the third channel 13, so that the water in the first channel 11 flows into the second channel 12, so that the water circulates and flows in the return water channel, so as to preheat the water in the hot water pipe 400 and the like in a circulating manner, so as to realize zero-cold water. After the preheating is completed, the elastic member 90 may drive the driving member 80 to rotate, so as to reset the blocking member 21 to the first position by the driving member 80, so as to close the water return valve 100 and the water return path.
Of course, the above water return valve 100 can also be used in the water supply system 1000 having the water return pipe 500, specifically, in another embodiment of the water supply system 1000 of the present invention, as shown in fig. 2, the water supply system 1000 includes the water return pipe 500, one end of the water return pipe 500 is connected to the hot water pipe 400, the other end is connected to one end of the first flow channel 11, and the other end of the first flow channel 11 is blocked (e.g. blocked by an end cover). The second flow passage 12 is connected to the water inlet pipe 210 of the gas heating apparatus 200 or the cold water pipe 300, and optionally, the second flow passage 12 is connected to the water inlet pipe 210 of the gas heating apparatus 200; specifically, one end of the second flow channel 12 is communicated with the water inlet through the water inlet pipe 210, and the other end of the second flow channel 12 is communicated with the cold water pipe 300 through the water inlet pipe 210. Optionally, the water return valve 100 is disposed near the gas heating apparatus 200. In this embodiment, when the outlet end 700 has a plurality of water return pipes 500, the water return pipe is connected to the farthest outlet end 700.
Thus, a water return path may be formed between the water outlet pipe 220, the hot water pipe 400, the water return pipe 500, the first flow path 11, the third flow path 13, the second flow path 12, the water inlet pipe 210, and the heat exchanger of the gas heating apparatus 200, that is, the water return valve 100 may be disposed in the water return path.
In this embodiment, as shown in fig. 2, the gas heating apparatus 200 further includes a water circulating pump 800, the water circulating pump 800 is disposed in the water return waterway, and the water circulating pump 800 is configured to drive water to flow in the water return waterway. When the water supply system 1000 uses the zero-cold-water function for preheating, as shown in fig. 4 and 5, the circulating water pump 800 may push water in the return water channel to flow, so that the water pressure in the first channel 11 is increased, so that the difference between the water pressure in the first channel 11 and the water pressure in the second channel 12 is increased, and when the water pressure difference between the first channel 11 and the second channel 12 is increased to a certain threshold, the water in the first channel 11 may flow into the third channel 13, so as to push the blocking piece 21 to move from the first position to the second position (the blocking piece 21 pushes the driving piece 80 to rotate, and the driving piece 80 drives the elastic piece 90 to elastically move), so as to open the third channel 13, so that the water in the first channel 11 flows into the second channel 12, so that the water circulates and flows in the return water channel, so as to preheat the water in the hot water pipe 400 and the like in a circulating manner, so as to realize zero-cold water. After the preheating is completed, the elastic member 90 may drive the driving member 80 to rotate, so that the blocking member 21 is reset to the first position by the driving member 80 to close the water return valve 100 and the water return path.
It is understood that in the above embodiment, the first flow passage 11 is a hot water end of the water return valve 100, and the second flow passage 12 is a cold water end of the water return valve 100.
The utility model discloses return water valve 100, increase to a certain threshold value (can understand that this threshold value is optional to be greater than 0, but also do not exclude 0) at the water pressure differential value of first runner 11 and second runner 12, water in the first runner 11 can promote shutoff piece 21 and move to the second position (shutoff piece 21 promotes driving piece 80 and rotates to drive elastic component 90 elastic motion) from the primary importance to open third runner 13 (open return water valve 100 promptly), so that water can flow at return water route inner loop, in order to realize circulating preheating to the water in hot-water line 400 etc., in order to realize zero cold water. After the preheating is completed, the elastic member 90 may drive the driving member 80 to rotate, so that the blocking member 21 is reset to the first position by the driving member 80 to close the water return valve 100 and the water return path.
Furthermore, the present invention can also be designed by factors such as the position and type of the elastic member 90 and the position of the rotation axis of the driving member 80, so as to control the opening condition of the blocking member 21 (e.g., the water pressure required for driving the blocking member 21 to move) to improve the applicability of the water return valve 100.
In order to better embody the technical effects of the following aspects of the present invention, the present invention further provides a drawback of the scheme that the water return valve 100 adopts a "compression spring sleeved on the blocking member to close the water return valve", that is, when the water outlet end 700 uses cold water alone, the water pressure of the second flow channel 12 decreases, and the water pressure difference between the first flow channel 11 and the second flow channel 12 increases, so that the water in the first flow channel 11 may push the blocking member 21 to move from the first position to the second position to partially open the third flow channel 13, so that the hot water in the hot water pipe 400 and the first flow channel 11 may flow into the third flow channel 13 and the second flow channel 12 (so that the gas heating device 200 may be started); if the problem is solved by increasing the elastic coefficient of the compression spring, the return water valve 100 is more seriously stopped when preheating because of the increase of the elastic coefficient of the spring, and finally the return water waterway circulation flow is lower, so that the preheating time of the water supply system 1000 is prolonged, and the adaptability is poor.
And the utility model discloses return water valve 100 designs through factors such as the position to elastic component 90 and/or the position of the rotation portion 81 of driving piece 80, then can solve above problem well.
Further, as shown in fig. 6, during the movement of the blocking member 21 from the first position to the second position, the component of the force of the elastic member 90 on the driving member 80 in the movable direction of the blocking member 21 is gradually reduced. So, can increase the required pressure of shutoff piece 21 when first position removes, can increase the threshold value, can increase the cracking pressure that the wet return 100 opened, thereby when the 700 exclusive uses cold water of play water end, can avoid wet return 100 to open, thereby can prevent hot water in hot-water line 400 of water supply system 1000 from passing through wet return 100 and getting into cold water pipe 300, thereby can realize the effect of preventing the cross-watering, thereby can avoid gas heating device 200 false start, thereby can improve water supply system 1000's performance. Furthermore, in the preheating process, since the component force of the acting force of the elastic member 90 on the driving member 80 in the movable direction of the blocking member 21 is gradually reduced in the process that the blocking member 21 moves from the first position to the second position, the opening resistance after the blocking member 21 is opened can be made small, so that the opening degree of the water return valve 100 can be secured, the shut-off phenomenon can be reduced, and the performance of the water supply system 1000 can be secured.
That is, through the above arrangement, the thrust required when the return valve 100 is opened may be made large to prevent the return valve 100 from being opened by mistake, and the thrust required after opening is reduced to ensure the opening degree of the return valve 100, so that the performance of the water supply system 1000 may be improved.
Further, as shown, the driving member 80 is rod-shaped. As such, not only the structure of the driving member 80 can be simplified, but also the design of the return valve 100 is facilitated.
Optionally, the driving member 80 is hollow or hollowed out. Thus, water can flow in the flow passage conveniently.
Of course, in other embodiments, the driving member 80 can be provided in other shapes, such as a plate shape.
Further, as shown in the figure, the driving member 80 includes a rotating portion 81, and a pressing section 82 and a driving section 83 respectively connected to two ends of the rotating portion 81.
The rotating portion 81 is provided with a rotating shaft or a rotating hole, so that the driving member is rotatably disposed in the flow channel.
The pressing section 82 is rotatably engaged with the plugging member 21 to drive the plugging member 21 to move when the driving member 80 rotates, or to drive the driving member to rotate when the plugging member 21 moves.
Alternatively, the rotating portion 81 may or may not have distinct features.
Further, as shown in fig. 3-5, the elastic member 90 is an extension spring 90. In this way, the block piece 21 can have a tendency to return to the first position by the pulling force of the tension spring 90.
Specifically, the extension spring 90 is disposed in the second flow passage 12, and the fixed position of the extension spring 90 in the second flow passage 12 is disposed on the side of the rotation axis of the driving member 80 away from the first flow passage. Thus, the design can be simplified.
Further, as shown in fig. 3 to 5, the fixing position of the extension spring 90 in the second flow passage 12 and the rotation axis of the driving member 80 are located on opposite sides of the blocking member 21, respectively, and the rotation axis of the driving member 80 is located on the side of the fixing position facing the first flow passage 11.
Specifically, in the state shown in fig. 3, the fixed position of the extension spring 90 in the second flow passage 12 is located above the block piece 21, the rotational axis of the driving member 80 is located below the block piece 21, and the rotational axis of the driving member 80 is located on the left side of the fixed position. In this embodiment, the upper end of the extension spring 90 is (rotatably) fixed in the second flow passage 12, and the lower end of the extension spring 90 is (rotatably) connected to the lower end of the driving member 80.
In this way, it is convenient to realize that the component of the force of the elastic member 90 on the driving member 80 in the movable direction of the blocking member 21 is gradually reduced during the movement of the blocking member 21 from the first position to the second position.
In this embodiment, as shown in fig. 3 to 6, during the movement of the blocking element 21 from the first position to the second position, the included angle between the extension spring 90 and the driving element 80 (specifically, the driving section 83) is gradually decreased, so that the component of the force of the elastic element 90 on the driving element 80 in the movable direction of the blocking element 21 is gradually decreased during the movement of the blocking element 21 from the first position to the second position.
In particular, fig. 6 shows the tension force F of the tension spring 90 during the movement of the block piece 21 from the first position to the second positionTension forceWherein the tensile force of the tension spring 90 is decomposed into a centripetal force FCentripetal directionAnd tangential force FCutting machineCentripetal force FCentripetal directionDirected toward the axis of rotation of the drive member 80, tangential force FCutting machineWith centripetal force FCentripetal directionVertical, tangential force FCentripetal directionCan represent a change in the component of the force of the resilient member 90 on the actuating member 80 in the direction in which the closing member 21 is movable. The pull rodThe angle between the extension spring 90 and the drive section 83, available as tension FTension forceWith centripetal force FCentripetal directionIs represented by the angle theta ofCutting machineSintheta-fraForce of。
Referring to fig. 3-5, during the movement of the blocking member 21 from the first position to the second position, the included angle θ will decrease from large to small, and although the extension spring 90 will be elongated, the decrease of the included angle θ will result in FCutting machineWhen the thrust force is reduced, the thrust force required when the water return valve 100 is opened/opened is large, the thrust force required after the opening is reduced, and the opening resistance is gradually reduced. Thus, the required thrust is reduced through the angle change of the extension spring 90 (i.e. the tension spring), and the effects of large opening pressure and small resistance after opening are realized.
Specifically, the blocking piece 21 moves from the first position to the second position, and the driving piece 80 rotates by a preset angle, where the preset angle is greater than or equal to 25 degrees and less than or equal to 60 degrees.
More specifically, the preset angle is optionally greater than or equal to 35 degrees and less than or equal to 50 degrees.
In this embodiment, the preset angle is 40 degrees; when the plugging piece 21 is located at the first position, the included angle θ can be selected to be 45 degrees, and when the plugging piece 21 is located at the second position, the included angle θ can be selected to be 5 degrees.
Further, as shown in fig. 3-5, the length of the pressing section 82 is smaller than the length of the driving section 83. Thus, the requirement for the extension spring 90 can be reduced so as to increase the thrust force and the like required when the return valve 100 is opened.
Optionally, the first flow channel 11 is a direct flow channel.
Optionally, the second flow channel 12 is a straight flow channel.
Optionally, the third flow channel 13 is a straight flow channel.
Of course, in other embodiments, the elastic member 90 may be configured in other structural forms, for example, in another embodiment of the elastic member 90, the elastic member 90 is a compression spring, and at this time, the compression spring may be disposed on a side of the driving member 80 facing the first flow channel 11, and an included angle between the compression spring and the driving member 80 (specifically, the driving section 83) is an obtuse angle or an acute angle, and a detailed structure thereof is not repeated herein.
Further, as shown in fig. 3 to 5, one end (specifically, the pressing section 82) of the driving member 80 abuts against the end of the plugging member 21, so that the one end of the driving member 80 is rotatably engaged with the plugging member 21. In this way, the connection between the drive element 80 and the closure element 21 can be simplified.
Further, as shown in fig. 3 to 5, one end (specifically, the pressing section 82) of the driving member 80 is provided with an abutting recess 821 toward the side of the block piece 21, and the block piece 21 abuts in the abutting recess 821. In this way, one end (specifically, the pressing section 82) of the driving member 80 and the blocking member 21 are prevented from being separated from each other during the rotation of the driving member 80, so that the reliability of the water return valve 100 can be improved.
Of course, the rotatable engagement between one end (specifically, the pressing section 82) of the driving member 80 and the plugging member 21 can also be achieved by other forms, such as one end (specifically, the pressing section 82) of the driving member 80 and one of the plugging members 21 are provided with a long sliding hole, and the other is provided with a rotating shaft, and the rotating shaft is rotatably installed in the long sliding hole; for another example, one end (specifically, the pressing section 82) of the driving element 80 is provided with a long sliding groove towards the side surface of the plugging element 21, a side wall surface of the long sliding groove is provided with a limit groove, a sliding portion is convexly provided on the circumferential surface of the plugging element 21, an end portion of the plugging element is provided in the long sliding groove, and the sliding portion is slidably provided in the limit groove; and so on.
Further, as shown in fig. 3 to 5, the water return valve 100 further includes a mounting seat 29 having a water flow passage (not shown), the mounting seat 29 is installed in the second flow passage 12, the water flow passage of the mounting seat 29 is communicated with the third flow passage 13, the driving member 80 is rotatably installed on the mounting seat 29, and the fixed position of the extension spring 90 is set on the mounting seat 29. That is, the upper end of the extension spring 90 is fixedly connected to the mounting seat 29.
Specifically, the mounting seat 29 is provided with a structure, such as a rotating shaft or a rotating hole, which is rotatably engaged with the driving member 80. In one embodiment, the rotating portion of the driving member 80 is provided with a rotating shaft, and the mounting seat 29 is provided with a rotating hole rotatably engaged with the rotating shaft; as another example, in another embodiment, the rotating portion of the driving member 80 is provided with a rotating hole, and the mounting seat 29 is provided with a rotating shaft rotatably engaged with the rotating hole; for another embodiment, a first rotation hole is formed on the rotation portion of the driving member 80, a second rotation hole is correspondingly formed on the mounting seat 29, and the rotation shaft sequentially passes through the first rotation hole and the second rotation hole to enable the driving member 80 to be rotatably mounted on the mounting seat 29; and so on.
Therefore, the direct arrangement of an assembly structure in the flow channel can be avoided, and the driving member 80 and the extension spring 90 can be mounted on the mounting seat 29 and then mounted in the flow channel together, so that the mounting of the water return valve 100 can be simplified, and the production efficiency can be improved.
The specific structure of the mounting seat 29 is not limited herein, as long as it does not affect the circulation of water in the flow channel, and the mounting seat can be set by a person skilled in the art as required.
Further, as shown in fig. 3-5, the backwater check valve 20 further includes a valve housing 22 with two open ends, the valve housing 22 is sealingly mounted (fixed) in the third flow passage 13, the blocking member 21 is movably disposed in the valve housing 22, and in the first position, the blocking member 21 blocks the valve housing 22 to block the third flow passage 13.
Thus, a structure for sealing engagement with the blocking member 21 can be avoided from being directly provided in the third flow passage 13, thereby simplifying the structure. Of course, in other embodiments, a structure that sealingly engages with the blocking element 21 may also be provided directly in the third flow channel 13.
Further, as shown in fig. 3 to 5, a sealing ring protrusion 221 is disposed on an inner wall surface of the valve housing 22, a blocking portion 211 is disposed at one end of the blocking member 21, and in the first position, the blocking portion 211 blocks the sealing ring protrusion 221, so that the blocking member 21 blocks the valve housing 22.
Specifically, as shown in fig. 3 to 5, the blocking portion 211 includes an insertion portion 2111 and an abutment portion 2112, and in the first position, the insertion portion 2111 is inserted (sealed) into the inside of the seal ring protrusion 221, and the abutment portion 2112 abuts against the side portion of the seal ring protrusion 221 facing the second flow channel 12. Therefore, on one hand, the sealing effect can be improved; on the other hand, when the block piece 21 is at the first position, the water in the third flow passage 13 pushes the block piece 21 by acting on the insertion portion 2111, and after the block piece 21 moves, the water in the third flow passage 13 can also act on the abutment portion 2112 to push the block piece 21, so that the effects of a large thrust force required when the return valve 100 is opened/opened, a small thrust force required after the opening, and a gradual reduction in opening resistance can be further achieved.
Alternatively, the area of the side surface of the abutment portion 2112 facing the first flow passage 11 is larger than or equal to the area of the side surface of the insertion portion 2111 facing the first flow passage 11.
Optionally, the threshold is greater than or equal to 0.04MPa and less than or equal to 0.06 MPa.
Optionally, a sealing ring is sleeved outside the insertion portion 2111.
Optionally, a sealing ring is sleeved outside the valve housing 22.
Optionally, the side of the sealing ring protrusion 221 facing the first flow passage 11 is a cambered surface.
Further, as shown in fig. 3 to 5, a water passage is provided on an inner wall surface of the valve housing 22, and in the second position, the water passage communicates the first flow passage 11 and the second flow passage 12, so that the backwater check valve 20 opens the third flow passage 13.
Specifically, the water passage is disposed on one side of the sealing ring protrusion 221 facing the second flow channel 12. The water passage may be a through hole penetrating the wall of the valve housing 22 or a groove formed in the inner wall of the valve housing 22.
Further, as shown in fig. 3 to 5, the backwater check valve 20 further includes a valve cover 23 having a water through hole (not shown), the valve cover 23 is disposed at an opening of the valve housing 22 near the second flow passage 12, the valve cover 23 is further provided with a guide support hole (not shown), and the blocking member 21 is movably disposed in the guide support hole. In this manner, the block piece 21 can be movably provided in the third flow passage 13.
Further, as shown in fig. 3 to 5, the valve cover 23 is further provided with a guide collar 232 at a periphery of the guide support hole, and the blocking member 21 is movably provided in the guide collar 232. In this way, the movement stability of the block piece 21 can be improved.
Further, as shown in fig. 3 to 5, the valve body 10 is further provided with an installation port (not shown) communicating with the second flow channel 12, and the installation port is arranged corresponding to a flow channel port of the third flow channel 13, so that the backwater check valve 20 can be installed in the third flow channel 13 through the installation port. Thus, the difficulty of installing the return check valve 20 can be reduced.
Specifically, the water return valve 100 further includes a sealing cover 70a, and the sealing cover 70a is detachably installed in the installation opening.
Alternatively, the valve body 10 is provided with a mounting protrusion corresponding to the mounting opening, and a jackscrew passes through the mounting protrusion to mount the sealing cover 70a in the mounting opening.
Further, as shown in fig. 3 to 5, the water return valve 100 further includes a filter screen 60, and the filter screen 60 is disposed at the flow passage inlet of the first flow passage 11.
Of course, in other embodiments of the water return valve 100 of the present invention, it is also possible to: in the process that the blocking piece 21 moves from the first position to the second position, the component force of the acting force of the elastic piece 90 on the driving piece 80 in the movable direction of the blocking piece 21 is increased firstly and then reduced, or is reduced firstly and then unchanged, or is reduced firstly and then increased, and the like, so that the thrust required when the water return valve 100 is opened is larger, and the water return valve 100 is prevented from being opened by mistake; the thrust required after the opening is reduced to secure the opening degree of the return valve 100, so that the performance of the water supply system 1000 can be improved. In addition, the scheme of reducing first and then keeping unchanged and the scheme of reducing first and then increasing can also avoid the overlarge opening degree of the water return valve 100. In addition, in this embodiment, the structure of the backwater check valve 20 and other structures of the backwater valve 100 can refer to the above embodiments, and need not be described in detail herein.
The utility model discloses still provide a water supply system, include:
a gas heating device;
the water outlet end is connected with the gas heating device through a cold water pipe, a hot water pipe and a water mixing device; and
and a first flow passage of the water return valve is connected to the hot water pipe, and a second flow passage of the water return valve is connected to the cold water pipe.
This water return valve's concrete structure refers to above-mentioned embodiment, because the utility model discloses water supply system has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, no longer gives unnecessary details here.
Wherein, the gas heating device is a gas water heater or a gas wall-hanging stove.
The utility model discloses still provide a water supply system, include:
a gas heating device;
the water outlet end is connected with the gas heating device through a cold water pipe, a hot water pipe and a water mixing device;
the second flow passage of the water return valve is connected to the cold water pipe; and
and one end of the water return pipe is connected to the hot water pipe, and the other end of the water return pipe is connected to the first flow channel of the water return valve.
This water return valve's concrete structure refers to above-mentioned embodiment, because the utility model discloses water supply system has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, no longer gives unnecessary details here.
Wherein, the gas heating device is a gas water heater or a gas wall-hanging stove.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (19)
1. A water return valve, comprising:
the valve body is provided with a flow passage, and the flow passage comprises a first flow passage, a second flow passage and a third flow passage, wherein the first flow passage and the second flow passage are arranged at intervals, and the third flow passage is communicated with the first flow passage and the second flow passage;
the backwater check valve is arranged in a third flow passage and comprises a plugging piece movably arranged in the third flow passage, and when the plugging piece is positioned at a first position, the backwater check valve closes the third flow passage; when the blocking piece is located at the second position, the backwater check valve opens the third flow passage;
the driving piece is rotatably arranged in the flow channel, the driving piece is positioned on one side of the blocking piece, which faces the second flow channel, and one end of the driving piece is rotatably matched with the blocking piece; and
the one end fixed connection of elastic component in the valve body, the other end of elastic component connect in the other end of driving piece, the elastic component is used for passing through the driving piece makes the shutoff piece has the trend that resets to the first position.
2. The return valve of claim 1, further comprising a valve housing open at both ends, said valve housing being sealingly mounted in said third flow passage, said blocking member being movably disposed in said valve housing, said blocking member blocking said valve housing in said first position.
3. The water return valve according to claim 2 wherein said valve housing is provided with a sealing ring protrusion on an inner wall surface thereof, and said blocking member is provided with a blocking portion at one end thereof, and said blocking portion blocks said sealing ring protrusion in said first position, so that said blocking member blocks said valve housing.
4. The water return valve according to claim 3, wherein the blocking portion includes an insertion portion that is inserted into an inner side of the sealing ring protrusion in the first position, and an abutting portion that abuts against a side portion of the sealing ring protrusion facing the second flow passage.
5. The water return valve according to claim 3 wherein a water passage is provided in an inner wall surface of said valve housing, said water passage communicating said first and second flow passages in said second position.
6. The water return valve according to claim 5 wherein said water passage is provided on a side of said sealing ring convex toward said second flow passage.
7. The return valve as claimed in claim 3, wherein the return check valve further comprises a valve cover having a water passing hole, the valve cover being provided at an opening of the valve housing adjacent to the second flow passage, the valve cover further having a guide support hole, the blocking member being movably provided in the guide support hole.
8. The water return valve according to claim 7 wherein said valve cover further includes a guide collar disposed around a periphery of said guide support hole, said blocking member being movably disposed in said guide collar.
9. The water return valve according to any one of claims 1 through 8 wherein the component force of the urging force of said elastic member to said driving member in the direction in which said blocking member is movable gradually decreases during the movement of said blocking member from said first position to said second position.
10. The water return valve according to claim 9 wherein said elastic member is an extension spring.
11. The water return valve according to claim 10 wherein said extension spring is disposed in said second flow passage, and a fixed position of said extension spring in said second flow passage and a rotational axis of said driving member are respectively located on opposite sides of said blocking member, and a rotational axis of said driving member is located on a side of said fixed position facing said first flow passage.
12. The water return valve of claim 11 wherein the angle between said extension spring and said driving member decreases as said blocking member moves from said first position to said second position; and/or the presence of a gas in the gas,
the plugging piece moves from the first position to the second position, the driving piece rotates for a preset angle, and the preset angle is greater than or equal to 25 degrees and less than or equal to 60 degrees; and/or the presence of a gas in the gas,
the driving piece comprises a rotating portion, and a pressing section and a driving section which are connected to two ends of the rotating portion respectively, the pressing section is rotatably matched with the plugging piece, the driving section is connected with the extension spring, and the length of the pressing section is smaller than that of the driving section.
13. The water return valve according to claim 11 wherein one end of said driving member abuts an end of said blocking member.
14. The water return valve according to claim 13 wherein said driving member is provided with an abutment recess on a side thereof facing said blocking member, said blocking member abutting in said abutment recess.
15. The water return valve according to any one of claims 1 through 8 further comprising a mounting block having a water flow passage, wherein the mounting block is mounted in the second flow passage, wherein the water flow passage of the mounting block is in communication with the third flow passage, wherein the driving member is rotatably mounted on the mounting block, and wherein the elastic member is fixedly attached to the mounting block.
16. The water return valve according to any one of claims 1 through 8 wherein said driving member is rod-shaped; and/or the presence of a gas in the gas,
in the process that the plugging piece moves from the first position to the second position, the component force of the acting force of the elastic piece on the driving piece in the movable direction of the plugging piece is increased firstly and then reduced, or is reduced firstly and then unchanged, or is reduced firstly and then increased.
17. A water supply system, comprising:
a gas heating device;
the water outlet end is connected with the gas heating device through a cold water pipe, a hot water pipe and a water mixing device; and
a water return valve according to any one of claims 1 to 16 having a first flow path connected to the hot water pipe and a second flow path connected to the cold water pipe.
18. The water supply system of claim 17, wherein the gas heating device is a gas water heater or a gas wall-hanging stove.
19. A water supply system, comprising:
a gas heating device;
the water outlet end is connected with the gas heating device through a cold water pipe, a hot water pipe and a water mixing device;
the water return valve according to any one of claims 1 to 16, wherein a second flow passage of the water return valve is connected to a cold water pipe; and
and one end of the water return pipe is connected to the hot water pipe, and the other end of the water return pipe is connected to the first flow channel of the water return valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020282969.3U CN212616578U (en) | 2020-03-09 | 2020-03-09 | Water return valve and water supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020282969.3U CN212616578U (en) | 2020-03-09 | 2020-03-09 | Water return valve and water supply system |
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| CN212616578U true CN212616578U (en) | 2021-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375345A (en) * | 2020-03-09 | 2021-09-10 | 芜湖美的厨卫电器制造有限公司 | Water return valve and water supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375345A (en) * | 2020-03-09 | 2021-09-10 | 芜湖美的厨卫电器制造有限公司 | Water return valve and water supply system |
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