Water flow switch

Abstract

The utility model discloses a water flow switch arranged on a water flow pipeline. The water flow switch comprises a supporting piece, an inductance coil and a hydrodynamic assembly. The supporting piece is installed on the water flow pipeline and at least partially located in the water flow pipeline. The inductance coil is installed in the area outside the inner wall of the water flow pipeline, and the area inside the inner wall of the water flow pipeline is used for water flow to flow. The hydrodynamic assembly is installed on the supporting piece and moves under the action of water flow passing through the area where the water flow switch is located on the water flow pipeline so as to change the relative position of the hydrodynamic assembly and the inductance coil, and therefore electric signals in a circuit where the inductance coil is located can be changed. The water flow switch judges whether the water flow switch is turned on or not according to the principle that electric signals in a circuit where the inductance coil is located can be changed by changing the relative position of the hydrodynamic assembly and the inductance coil during movement.

Description

Technical Field

[0001] The utility model belongs to the technical field of switches, and in particular relates to a water flow switch that can be used in an intelligent pump. Background Art

[0002] A water flow switch is a controller used for controlling water circulation, water inflow and outflow, water pump switching, and solenoid valve on / off. It's a sensor that converts water flow into an on / off electrical signal when a certain flow rate is reached. Existing water flow switches rely on the interaction between a magnet and a magnetically controlled switch. During operation, the magnet is placed in the water for extended periods to separate water from electricity. However, magnets are highly susceptible to attracting impurities in the water. This prolonged absorption of impurities by the magnet can cause the water flow switch to malfunction, causing significant user problems. Utility Model Content

[0003] The purpose of the utility model is to provide a water flow switch with a new structure which does not rely on the interaction between a magnet and a magnetically controlled switch.

[0004] The technical solution of the utility model is:

[0005] A water flow switch is provided on a water flow pipeline; the water flow switch comprises:

[0006] a support member, the support member being mounted on the water flow pipeline and at least partially located in the water flow pipeline;

[0007] an inductor coil, the inductor coil being installed in an area outside the inner wall of the water flow pipeline, wherein the area inside the inner wall of the water flow pipeline is an area for water flow;

[0008] A hydraulic component is installed on the support member. The hydraulic component moves under the action of the water flow passing through the area where the water flow switch is located on the water flow pipeline, so as to change the relative position with the inductor coil and cause the electrical signal in the circuit where the inductor coil is located to change.

[0009] In a water flow switch in a preferred embodiment, the component in the water-powered assembly for changing the electrical signal in the circuit where the inductor coil is located by changing its relative position with the inductor coil is a stainless steel induction piece.

[0010] In a water flow switch in a preferred embodiment, the support member is provided with a through hole, and the water flows in the through hole when flowing through the area where the water flow switch is located on the water flow pipeline;

[0011] The hydrodynamic component includes an elastic part and an induction part. The elastic part is provided between the induction part and the support part. The induction part blocks the through hole under the elastic force of the elastic part. When the water pressure on the induction part is greater than the elastic force of the elastic part, the induction part moves under the action of the water flow to open the through hole. When the water pressure on the induction part is less than the elastic force of the elastic part, the induction part moves to close the through hole under the action of the elastic part. When the induction part moves, the relative position with respect to the induction coil changes, thereby changing the electrical signal in the circuit where the induction coil is located.

[0012] In a water flow switch in a preferred embodiment, the support member comprises a support plate, and the through hole is provided on the support plate;

[0013] The hydrodynamic assembly further includes a connecting member, the connecting member passing through the through hole and having two ends thereof extending out of the surface of the support plate; one end of the connecting member located downstream of the water flow is connected to the sensing member, and one end of the connecting member located upstream of the water flow is connected to a limiting member;

[0014] The elastic member is provided between the limiting member and the support plate, and the elastic member is used to provide elastic force to press the sensing member onto the support plate, and when the sensing member is pressed onto the support plate, the sensing member closes the through hole on the support plate; the limiting member is also used to cooperate with the support plate to limit the displacement of the connecting member in the downstream direction of the water flow driven by the sensing member.

[0015] In a water flow switch in a preferred embodiment, a plurality of through holes are provided on the support plate, and the plurality of through holes include a first through hole and at least one second through hole, the connecting member passes through the first through hole, and the second through hole is provided on the circumferential outside of the first through hole.

[0016] In a water flow switch of a preferred embodiment, the support member includes a support plate, and the through hole is provided on the support plate; the sensing member is located on one side of the support plate, and when the sensing member is pressed against the support plate under the action of the elastic member, the sensing member closes the through hole on the support plate;

[0017] The side of the sensing member facing the support plate is the first side of the sensing member, and the side of the sensing member facing away from the support plate is the second side of the sensing member;

[0018] The hydrodynamic assembly further comprises a buffer seal ring, an annular groove is provided on the inner side wall of the buffer seal ring, and the edges of the sensor are all embedded in the annular groove;

[0019] The portion of the buffer seal ring located on the first side of the sensing element is a sealing portion; when the sensing element is pressed against the support plate under the action of the elastic member, the edges of the sensing element are pressed against the support plate through the sealing portion;

[0020] The portion of the buffer seal ring located on the second side of the sensing element is a buffer portion, which is used to buffer the sensing element when it overcomes the elastic force of the elastic element under the action of water flow and moves away from the support plate and is about to collide with other components.

[0021] In a preferred embodiment, the water flow switch is provided on an L-shaped water flow pipeline, the L-shaped water flow pipeline having a first channel and a second channel, the first end of the first channel being an inlet end of the L-shaped water flow pipeline, the second end of the first channel being a mounting end, the first end of the second channel being in communication with the first channel from a side direction of the first channel, and the second end of the second channel being an outlet end of the L-shaped water flow pipeline;

[0022] The support member and the hydrodynamic assembly enter the first channel from the mounting end; an inner wall of the first channel has an abutment surface facing the mounting end;

[0023] The water flow switch also includes a mounting member, which is fixedly mounted on the L-shaped water flow pipeline or fixedly mounted outside the L-shaped water flow pipeline and on other components whose relative position with the L-shaped water flow pipeline remains unchanged; at least a portion of the mounting member enters the first channel from the mounting end and presses the support member to be fixed on the abutment surface.

[0024] In a water flow switch in a preferred embodiment, a mounting groove is provided on the portion of the mounting member extending into the first channel, the mounting groove is not connected to the first channel and the second channel, and the inductor coil is installed in the mounting groove.

[0025] In a water flow switch in a preferred embodiment, the water dynamic component includes a rotor and a sensing element;

[0026] The rotor is rotatably connected to the support member, and the rotor is configured to rotate under the action of the water flow when water flows through the area where the rotor is located in the water flow pipeline; the induction member is connected to the outer wall of the rotating shaft of the rotor;

[0027] The inductor is located outside the circumference of the rotor. When the inductor rotates with the rotation of the rotor, the position of the inductor relative to the inductor changes periodically, causing the electrical signal in the circuit where the inductor is located to change to form a pulse signal.

[0028] In a water flow switch in a preferred embodiment, the sensing member is a plate member, and the sensing member is extended outwardly along the radial direction of the rotating shaft of the rotor;

[0029] The hydrodynamic assembly includes a plurality of the induction elements, and the plurality of the induction elements are evenly distributed around the circumference of the rotating shaft of the rotor.

[0030] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0031] The water flow switch provided by this utility model determines whether the water flow switch is open by utilizing the principle that the change in the relative position of the hydraulic assembly and the inductor coil during movement causes a change in the electrical signal in the circuit containing the inductor coil. Furthermore, when the component of the hydraulic assembly that causes the change in the electrical signal in the circuit containing the inductor coil by changing its relative position with the inductor coil is made of a metal material such as stainless steel, copper, or aluminum that does not absorb or react with impurities in water, the service life of the water flow switch can be effectively extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those skilled in the art. The accompanying drawings are only for illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0033] Figure 1 This is a schematic structural diagram of a water flow switch in Example 1 (wherein the mounting member and the inductor are not shown);

[0034] Figure 2 and Figure 3 This is a schematic structural diagram of a support member in Example 1;

[0035] Figure 4 This is a schematic diagram of the assembly of a connecting member, a limiting member, and an elastic member in Example 1;

[0036] Figure 5 This is a schematic structural diagram of a sensing element in Example 1;

[0037] Figure 6 This is a schematic structural diagram of a buffer seal ring in Example 1;

[0038] Figure 7 This is a cross-sectional schematic diagram of a buffer seal ring in Example 1;

[0039] Figure 8 This is a schematic structural diagram of a mounting member in Example 1;

[0040] Figure 9This is an overall appearance diagram of a water flow switch in Example 1 when installed on an L-shaped water flow pipeline;

[0041] Figure 10 This is a schematic diagram of the assembly between an L-shaped water flow pipeline and a mounting member in Example 1;

[0042] Figure 11 Schematic cross-sectional view of an L-shaped water flow pipeline in Example 1;

[0043] Figure 12 This is a schematic structural diagram of an inductor coil in Example 1;

[0044] Figure 13 This is a schematic diagram of the overall structure of a rotor and an induction component in Example 2;

[0045] Figure 14 Schematic diagram of the installation position of the inductor coil in Example 2.

[0046] Description of reference numerals:

[0047] 1: Inductor coil;

[0048] 2: Support member; 2-1: Support plate; 2-1-1: First through hole; 2-1-2: Second through hole; 2-2: Annular side wall; 2-2-1: Flow hole; 2-3: Annular protrusion; 2-4: Second annular protrusion;

[0049] 3: Sensing element (in Example 1); 3-1: Threaded hole;

[0050] 4: elastic parts;

[0051] 5: Mounting piece; 5-0: Mounting slot; 5-1: Mounting plate; 5-2: Raised structure; 5-3: Positioning protrusion;

[0052] 6: Connector; 6-1: External thread;

[0053] 7: limiter;

[0054] 8: Buffer seal ring; 8-1: Annular groove; 8-2: Sealing part; 8-3: Buffer part;

[0055] 9: seal;

[0056] 10: L-shaped water flow pipe; 10-1: first channel; 10-1-1: first section; 10-1-2: second section; 10-1-3: abutment surface; 10-2: second channel; 10-3: mounting flange;

[0057] 11: rotor; 11-1: rotating shaft;

[0058] 12: Sensing element (in Example 2). DETAILED DESCRIPTION

[0059] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0060] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0061] The core of the present utility model is to provide a water flow switch, which is arranged on a water flow pipeline. The water flow switch includes a support 2, an inductor 1, and a hydraulic assembly. The support 2 is installed on the water flow pipeline and is at least partially located inside the water flow pipeline. The inductor 1 is installed in an area outside the inner wall of the water flow pipeline, wherein the area inside the inner wall of the water flow pipeline is the area for water flow. The hydraulic assembly is installed on the support 2. The hydraulic assembly moves under the influence of the water flow passing through the area where the water flow switch is located on the water flow pipeline, thereby changing its relative position with the inductor 1 and causing the electrical signal in the circuit where the inductor 1 is located to change.

[0062] The circuit containing the inductor coil 1 can be an inductive proximity switch circuit, comprising an LC oscillator circuit, a signal trigger, and a switching amplifier. In this embodiment, the inductor coil 1 is the coil of the oscillator circuit. When the component in the hydraulic assembly, which is used to change the electrical signal in the circuit containing the inductor coil 1 by changing its relative position with the inductor coil 1, approaches the high-frequency variable magnetic field generated by the inductor coil 1, hysteresis and eddy current losses occur, thereby reducing the energy of the LC oscillator circuit and thus reducing oscillation. When the signal trigger detects this reduction, it converts it into a switching signal, thereby determining whether the water flow switch is on. The circuit containing the inductor coil 1 can also be another circuit, for example, where the inductor coil 1 forms a current loop with a power supply, a resistor, or the like. When the component in the hydraulic assembly, which is used to change the electrical signal in the circuit containing the inductor coil 1 by changing its relative position with the inductor coil 1, approaches the inductor coil 1, the current and voltage in the inductor coil 1 will change accordingly. The changes in current and voltage can be used to determine whether the current switch is on. Therefore, the present invention does not limit the specific design of the circuit containing the inductor coil 1.

[0063] The water flow switch of the present invention uses the principle that the change in the relative position of the water-dynamic component and the inductor 1 during movement causes the electrical signal in the circuit where the inductor 1 is located to change, to determine whether the water flow switch is turned on.

[0064] Furthermore, when the component in the water-powered assembly that is used to change the electrical signal in the circuit where the inductor coil 1 is located by changing the relative position of the inductor coil 1 is made of metal materials such as stainless steel, copper, and aluminum that do not absorb impurities in the water and are not easy to react with impurities in the water, the service life of the water flow switch can be effectively extended.

[0065] The following provides a variety of specific embodiments around the core creative ideas of the present invention; however, it should be noted that the following embodiments are not limitations of the present invention.

[0066] Example 1

[0067] See Figures 1 to 12 This embodiment provides a water flow switch disposed on a water flow pipeline. A support member 2 is mounted on the water flow pipeline and is at least partially located within the water flow pipeline. The area within the inner wall of the water flow pipeline is used for water flow, and the inductor coil 1 is mounted in an area outside the inner wall of the water flow pipeline, that is, the inductor coil 1 does not come into contact with the water flow. The hydraulic component is mounted on the support member 2, and the hydraulic component moves under the influence of the water flow passing through the area of ​​the water flow switch on the water flow pipeline, thereby changing its relative position with the inductor coil 1 and causing the electrical signal in the circuit where the inductor coil 1 is located to change.

[0068] Specifically, support member 2 is provided with a through-hole, through which water flows when passing through the area of ​​the water flow switch on the water flow pipeline. The hydraulic assembly includes an elastic member 4 and a sensor 3. The elastic member 4 is disposed between the sensor 3 and support member 2. The sensor 3 blocks the through-hole under the elastic force of the elastic member 4. When the water pressure on the sensor 3 is greater than the elastic force of the elastic member 4, the sensor 3 moves under the action of the water flow to open the through-hole. When the water pressure on the sensor 3 is less than the elastic force of the elastic member 4, the sensor 3 moves under the action of the elastic member 4 to close the through-hole. As the sensor 3 moves, its relative position with respect to the inductor 1 changes, causing the electrical signal in the circuit in which the inductor 1 is located to change.

[0069] The water flow switch of this embodiment is further described below.

[0070] The water flow switch in this embodiment is arranged on an L-shaped water flow pipe. Figures 9 to 11 As shown, the L-shaped water flow pipeline 10 has a first channel 10-1 and a second channel 10-2. The first end of the first channel 10-1 is the inlet end of the L-shaped water flow pipeline 10, and the second end of the first channel 10-1 is the installation end; the first end of the second channel 10-2 is connected to the first channel 10-1 from the side of the first channel 10-1, and the second end of the second channel 10-2 is the outlet end of the L-shaped water flow pipeline 10.

[0071] The inner wall of the first channel 10-1 has an abutment surface 10-1-3 facing the mounting end. Specifically, a step is formed on the inner wall of the first channel 10-1, and the end surface of the step serves as the abutment surface 10-1-3. The first channel 10-1 is divided into two sections, separated by the end surface of the step: a first section 10-1-1 near the inlet end of the L-shaped water flow conduit 10, and a second section 10-1-2 near the mounting end. The diameter of the first section 10-1-1 is smaller than that of the second section 10-1-2. The abutment surface 10-1-3 is an annular structure. The inner wall of the first section 10-1-1 is connected to the inner edge of the annular structure of the abutment surface 10-1-3, and the inner wall of the second section 10-1-2 is connected to the outer edge of the annular structure of the abutment surface 10-1-3.

[0072] The support member 2 and the hydrodynamic assembly enter the first channel 10-1, and the entire support member 2 and the hydrodynamic assembly are located in the first channel 10-1. Figures 1 to 3As shown, the support member 2 includes a support plate 2-1 and an annular side wall 2-2. The support plate 2-1 has a first surface and a second surface that are arranged opposite to each other, wherein the first surface faces the abutting surface 10-1-3 and the second surface faces the mounting end. The edges of the second surface of the support plate 2-1 protrude toward the mounting end to form the annular side wall 2-2. The support plate 2-1 is provided with the above-mentioned through hole, and the openings at both ends of the through hole are respectively opened on the first surface and the second surface of the support plate 2-1; the annular side wall 2-2 is provided with a flow hole 2-2-1, and the openings at both ends of the flow hole 2-2-1 are respectively opened on the inner side wall and the outer side wall of the annular side wall 2-2. The water flows into the first channel 10-1 (specifically, the first section 10-1-1 of the first channel 10-1) from the inlet end, then enters the inner space of the annular side wall 2-2 through the through hole, and then reaches the outer space of the annular side wall 2-2 through the flow hole 2-2-1, that is, reaches the second section 10-1-2 of the first channel 10-1, and finally enters the second channel 10-2 and flows out from the output end.

[0073] The water flow switch also includes a mounting member 5, which is fixedly mounted on the L-shaped water flow conduit 10 or on another component external to the L-shaped water flow conduit 10 that maintains a constant relative position to the L-shaped water flow conduit 10. At least a portion of the mounting member 5 extends from the mounting end into the first passage 10-1 and presses the support member 2 against the abutment surface 10-1-3.

[0074] Furthermore, the portion of the mounting member 5 that extends into the first channel 10-1 is provided with a mounting groove 5-0. Mounting groove 5-0 is not connected to the first channel 10-1 or the second channel 10-2. The inductor 1 is mounted within mounting groove 5-0 to achieve water-to-electricity separation. Simultaneously, the inductor 1 can be positioned as close as possible to the sensing member 3. This allows, if the circuit in which the inductor 1 resides employs an inductive proximity switch, the movement of the sensing member 3 toward the inductor 1 under the influence of water flow further reduces the energy in the LC oscillating circuit, further reducing the oscillation and making the signal trigger easier to identify.

[0075] Specifically, the mounting member 5 includes a mounting plate 5-1 and a raised structure 5-2. The mounting plate 5-1 is located outside the first channel 10-1, and the surface of the mounting plate 5-1 facing the first channel 10-1 abuts against the end face corresponding to the mounting end in the L-shaped water flow pipeline 10. The relative positions of the mounting plate 5-1 and the L-shaped water flow pipeline 10 are fixed. Furthermore, a mounting flange 10-3 can be formed on the outside of the end of the pipe wall corresponding to the mounting end in the L-shaped water flow pipeline 10. The end face of the first section 10-1-1 of the mounting flange 10-3 facing away from the first channel 10-1 is flush with the end face corresponding to the mounting end in the L-shaped water flow pipeline 10, and together abuts against the surface of the mounting plate 5-1. Mounting holes are respectively provided on the mounting flange 10-3 and the mounting plate 5-1, so that the mounting member 5 can be fixedly mounted on the L-shaped water flow pipeline 10 by fasteners such as bolts.

[0076] The protruding structure 5-2 is arranged on the surface of the mounting plate 5-1 facing the first channel 10-1, the protruding structure 5-2 extends into the first channel 10-1, and the circumferential outer wall of the protruding structure 5-2 is adapted to the inner wall of the second section 10-1-2 of the first channel 10-1, thereby limiting the circumferential freedom of the mounting member 5 and the L-shaped water flow pipeline 10.

[0077] When the mounting member 5 is fixedly mounted on the L-shaped water flow pipe 10, the surface of the raised structure 5-2 facing the first section 10-1-1 of the first channel 10-1 is pressed against the end surface of the annular side wall 2-2 of the support member 2 facing the mounting end, thereby pressing and fixing the support member 2 against the abutment surface 10-1-3. Furthermore, a positioning protrusion 5-3 can be provided on the surface of the raised structure 5-2 facing the first section 10-1-1 of the first channel 10-1. The positioning protrusion 5-3 extends into the interior of the annular side wall 2-2, and the circumferential outer wall of the positioning protrusion 5-3 is adapted to the inner wall of the annular side wall 2-2, thereby achieving positioning between the mounting member 5 and the support member 2.

[0078] The hydrodynamic assembly includes the aforementioned sensing element 3, the aforementioned elastic element 4, a connecting element 6, and a limiting element 7. The connecting element 6 is provided with a through hole, and its two ends extend out of the first and second surfaces of the support plate 2-1, respectively. Of the two ends of the connecting element 6 extending out of the first and second surfaces of the support plate 2-1, the end located downstream of the water flow is connected to the sensing element 3, and the end located upstream of the water flow is connected to the limiting element 7.

[0079] An elastic member 4 is provided between the limiting member 7 and the support plate 2-1. The elastic member 4 is used to provide elastic force to press the sensing member 3 onto the support plate 2-1, and when the sensing member 3 is pressed onto the support plate 2-1, the sensing member 3 closes the through hole on the support plate 2-1. The limiting member 7 is also used to cooperate with the support plate 2-1 to limit the displacement of the connecting member 6 in the downstream direction of the water flow driven by the sensing member 3. More specifically, the connecting member 6 is a rod structure, and the connecting member 6 and the limiting member 7 can be made into one piece. The end of the connecting member 6 used for connecting to the sensing member 3 can be provided with an external thread 6-1, and a corresponding threaded hole 3-1 is provided on the sensing member 3. The connecting member 6 and the sensing member 3 are connected by threads. The elastic member 4 can be a compression spring. The compression spring is sleeved on the connecting member 6, with one end abutting against the surface of the limiting member 7 facing the installation end, and the other end abutting against the first surface of the support plate 2-1.

[0080] The support plate 2-1 may be provided with multiple through holes, including a first through hole 2-1-1 and at least one second through hole 2-1-2. The connector 6 passes through the first through hole 2-1-1, and the second through hole 2-1-2 is provided circumferentially outside the first through hole 2-1-1. In this embodiment, preferably, the support plate 2-1 includes three second through holes 2-1-2, which are evenly distributed along the circumference of the first through hole 2-1-1.

[0081] The component in the water-operated assembly that alters the electrical signal in the circuit containing the inductor 1 by changing its relative position with the inductor 1, known as the induction element 3, can be made of stainless steel or other metals such as copper and aluminum. Metals like stainless steel will not absorb or react with impurities in the water, effectively extending the life of the water flow switch.

[0082] The side of the sensing member 3 facing the support plate 2-1 is called the first side of the sensing member 3, and the side of the sensing member 3 facing away from the support plate 2-1 is called the second side of the sensing member 3. Preferably, the hydrodynamic assembly further comprises a buffer seal ring 8, an annular groove 8-1 is provided on the inner side wall of the buffer seal ring 8, and the edges of the sensing member 3 are all embedded in the annular groove 8-1. The portion of the buffer seal ring 8 located on the first side of the sensing member 3 is the sealing portion 8-2; when the sensing member 3 is pressed against the support plate 2-1 under the action of the elastic member 4, the edges of the sensing member 3 are pressed against the support plate 2-1 through the sealing portion 8-2, so that when the sensing member 3 is pressed against the support plate 2-1, it can further ensure sealing and ensure that the through hole is completely closed. The portion of the buffer seal 8 located on the second side of the sensing element 3 is the buffer portion 8-3. This portion is used to cushion the flow when the sensing element 3, under the action of the water flow, overcomes the elastic force of the elastic member 4 and moves away from the support plate 2-1, potentially colliding with another component (specifically, the surface of the positioning protrusion 5-3 facing the first section 10-1-1 of the first channel 10-1 in this embodiment). The buffer seal 8 can be made of rubber or silicone.

[0083] Preferably, a sealing member 9 can be provided between the support plate 2-1 and the abutment surface 10-1-3, so that water flowing from the first section 10-1-1 of the first channel 10-1 into the second section 10-1-2 can only pass through the through-holes in the support plate 2-1. Specifically, an annular protrusion 2-3 can be provided on the first surface of the support plate 2-1, extending into the first section 10-1-1 of the first channel 10-1. The sealing member 9 can be a sealing ring, which is sleeved on the outer wall of the annular protrusion 2-3, so that the sealing ring is mounted on the support member 2. When the support plate 2-1 is pressed and fixed on the abutment surface 10-1-3, the two ends of the sealing ring respectively abut the abutment surface 10-1-3 and the first surface of the support plate 2-1 located outside the annular protrusion 2-3. The through-holes in the support plate 2-1 are provided on the portion of the support plate 2-1 located inside the annular protrusion 2-3, and the elastic member 4 is located inside the annular protrusion 2-3. Furthermore, an annular protrusion 2-4 is also provided on the second surface of the support plate 2-1 at a position relative to the aforementioned annular protrusion 2-3. For the sake of distinction, the annular protrusion 2-4 on the second surface of the support plate 2-1 is referred to as the second annular protrusion 2-4. The provision of the second annular protrusion 2-4 can optimize the structure of the support member 2.

[0084] Example 2

[0085] See Figure 13 and Figure 14This embodiment provides a water flow switch disposed on a water flow pipeline. A support member 2 is mounted on the water flow pipeline and is at least partially located within the water flow pipeline. The area within the inner wall of the water flow pipeline is used for water flow, and the inductor coil 1 is mounted in an area outside the inner wall of the water flow pipeline, that is, the inductor coil 1 does not come into contact with the water flow. The hydraulic component is mounted on the support member, and the hydraulic component moves under the influence of the water flow passing through the area of ​​the water flow switch on the water flow pipeline, thereby changing its relative position with the inductor coil 1 and causing the electrical signal in the circuit where the inductor coil 1 is located to change.

[0086] Specifically, the hydrodynamic assembly includes a rotor 11 and an inductor 12. Rotor 11 is rotatably connected to a support member and is configured to rotate when water flows through the area of ​​the water pipeline where rotor 11 is located. Inductor 12 is connected to the outer wall of the rotating shaft 11-1 of rotor 11. An inductor 1 is located circumferentially outside rotor 11. As inductor 12 rotates with rotor 11, its position relative to inductor 1 changes periodically, causing the electrical signal in the circuit containing inductor 1 to change, generating a pulse signal.

[0087] That is, in the water flow switch provided in this embodiment, when water flows into the water flow pipe area where the water flow switch is located, the water flow will drive the rotor 11 to rotate, thereby driving the induction member 12 to rotate around the axis of the rotation axis 11-1 of the rotor 11, so that the position of the induction member 12 and the induction coil 1 will change periodically, which will cause the electrical signal in the circuit where the induction coil 1 is located to also change periodically, thereby forming a pulse signal, which can reflect that there is always water flowing through the water flow switch; when the water flow stops flowing in, the rotor 11 stops rotating, the induction member 12 also stops rotating, the position of the induction member 12 and the induction coil 1 no longer changes, and the electrical signal in the circuit where the induction coil 1 is located no longer changes, which reflects that there is no water flowing through the water flow switch at this time.

[0088] Preferably, the sensing member 12 is a plate member and extends outwardly in the radial direction of the rotation axis 11-1 of the rotor 11. The hydrodynamic assembly includes a plurality of sensing members 12, which are evenly distributed around the circumference of the rotation axis 11-1 of the rotor 11. In this embodiment, the hydrodynamic assembly includes four sensing members 12, which are evenly distributed around the circumference of the rotation axis 11-1 of the rotor 11, forming a "cross" shape. In this embodiment, the sensing member 12 and the rotor 11 are preferably manufactured integrally. Of course, in other embodiments, the sensing member 12 and the rotor 11 can also be manufactured separately and then connected together by welding or other methods, which is not limited here.

[0089] Preferably, the component in the water-actuated assembly that changes the electrical signal in the circuit containing the inductor 1 by changing its relative position with the inductor 1, namely the induction element 12, can be made of stainless steel, i.e., a stainless steel plate. Stainless steel, when made of a material that does not absorb or react with impurities in water, can effectively extend the life of the water flow switch.

[0090] The sensing element 12 is mounted on the rotor 11. There are no specific limitations on how the rotor 11 is mounted within the water flow conduit via the support member. For example, a structure similar to that of the water flow conduit, support member 2, and mounting member 5 in Example 1 can be employed. Grooves are provided on the surface of the support plate 2-1 facing the mounting end and on the end surface of the positioning protrusion 5-3 facing the abutment surface 10-1-3. The ends of the rotating shaft 11-1 of the rotor 11 abut the bottom surfaces of these two grooves, respectively. The outer sidewalls of the rotating shaft 11-1 are also aligned with the inner sidewalls of the two grooves. Constrained by these grooves, the rotating shaft 11-1 has only one degree of freedom: rotation along its axis.

[0091] The inductor 1 is preferably arranged on the circumference of the rotor 11 and needs to be arranged outside the inner wall of the water flow pipe. The specific position of the inductor 1 is not limited, for example, it can be Figure 14 An installation groove for installing the inductor coil 1 is provided at the position indicated by a on the outer wall of the intermediate water flow pipeline.

[0092] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they will still fall within the scope of protection of the present invention.

Claims

1. A water flow switch, characterized in that: Set on the water flow pipeline, the water flow switch includes: a support member, the support member being mounted on the water flow pipeline and at least partially located in the water flow pipeline; an inductor coil, the inductor coil being installed in an area outside the inner wall of the water flow pipeline, wherein the area inside the inner wall of the water flow pipeline is an area for water flow; A hydraulic component is installed on the support member. The hydraulic component moves under the action of the water flow passing through the area where the water flow switch is located on the water flow pipeline, so as to change the relative position with the inductor coil and cause the electrical signal in the circuit where the inductor coil is located to change.

2. The water flow switch according to claim 1, characterized in that: The component in the hydraulic assembly used to change the electrical signal in the circuit where the inductor coil is located by changing its relative position with the inductor coil is a stainless steel induction piece.

3. The water flow switch according to claim 1 or 2, characterized in that: The support member is provided with a through hole, and the water flows in the through hole when flowing through the area where the water flow switch is located on the water flow pipeline; The hydrodynamic component includes an elastic part and an induction part. The elastic part is provided between the induction part and the support part. The induction part blocks the through hole under the elastic force of the elastic part. When the water pressure on the induction part is greater than the elastic force of the elastic part, the induction part moves under the action of the water flow to open the through hole. When the water pressure on the induction part is less than the elastic force of the elastic part, the induction part moves to close the through hole under the action of the elastic part. When the induction part moves, the relative position with respect to the induction coil changes, thereby changing the electrical signal in the circuit where the induction coil is located.

4. The water flow switch according to claim 3, characterized in that: The support member comprises a support plate, and the through hole is provided on the support plate; The hydrodynamic assembly further includes a connecting member, the connecting member passing through the through hole and having two ends thereof extending out of the surface of the support plate; one end of the connecting member located downstream of the water flow is connected to the sensing member, and one end of the connecting member located upstream of the water flow is connected to a limiting member; The elastic member is provided between the limiting member and the support plate, and the elastic member is used to provide elastic force to press the sensing member onto the support plate, and when the sensing member is pressed onto the support plate, the sensing member closes the through hole on the support plate; the limiting member is also used to cooperate with the support plate to limit the displacement of the connecting member in the downstream direction of the water flow driven by the sensing member.

5. The water flow switch according to claim 4, characterized in that: The support plate is provided with a plurality of through holes, the plurality of through holes including a first through hole and at least one second through hole, the connecting member passes through the first through hole, and the second through hole is provided on the circumferential outside of the first through hole.

6. The water flow switch according to claim 3, characterized in that: The support member includes a support plate, and the through hole is provided on the support plate; the sensing member is located on one side of the support plate, and when the sensing member is pressed against the support plate under the action of the elastic member, the sensing member closes the through hole on the support plate; The side of the sensing member facing the support plate is the first side of the sensing member, and the side of the sensing member facing away from the support plate is the second side of the sensing member; The hydrodynamic assembly further comprises a buffer seal ring, an annular groove is provided on the inner side wall of the buffer seal ring, and the edges of the sensor are all embedded in the annular groove; The portion of the buffer seal ring located on the first side of the sensing element is a sealing portion; when the sensing element is pressed against the support plate under the action of the elastic member, the edges of the sensing element are pressed against the support plate through the sealing portion; The portion of the buffer seal ring located on the second side of the sensing element is a buffer portion, which is used to buffer the sensing element when it overcomes the elastic force of the elastic element under the action of water flow and moves away from the support plate and is about to collide with other components.

7. The water flow switch according to claim 3, characterized in that: The water flow switch is arranged on an L-shaped water flow pipeline, and the L-shaped water flow pipeline has a first channel and a second channel. The first end of the first channel is the inlet end of the L-shaped water flow pipeline, the second end of the first channel is the installation end, the first end of the second channel is connected to the first channel from the side of the first channel, and the second end of the second channel is the outlet end of the L-shaped water flow pipeline; The support member and the hydrodynamic assembly enter the first channel from the mounting end; an inner wall of the first channel has an abutment surface facing the mounting end; The water flow switch also includes a mounting member, which is fixedly mounted on the L-shaped water flow pipeline or fixedly mounted outside the L-shaped water flow pipeline and on other components whose relative position with the L-shaped water flow pipeline remains unchanged; at least a portion of the mounting member enters the first channel from the mounting end and presses the support member to be fixed on the abutment surface.

8. The water flow switch according to claim 7, characterized in that: A mounting groove is provided on the portion of the mounting member extending into the first channel. The mounting groove is not communicated with the first channel and the second channel, and the inductor coil is installed in the mounting groove.

9. The water flow switch according to claim 1 or 2, characterized in that: The hydrodynamic assembly includes a rotor and an induction component; The rotor is rotatably connected to the support member, and the rotor is configured to rotate under the action of the water flow when water flows through the area where the rotor is located in the water flow pipeline; the induction member is connected to the outer wall of the rotating shaft of the rotor; The inductor is located outside the circumference of the rotor. When the inductor rotates with the rotation of the rotor, the position of the inductor relative to the inductor changes periodically, causing the electrical signal in the circuit where the inductor is located to change to form a pulse signal.

10. The water flow switch according to claim 9, characterized in that: The induction member is a plate member, and the induction member is extended outward along the radial direction of the rotating shaft of the rotor; The hydrodynamic assembly includes a plurality of the induction elements, and the plurality of the induction elements are evenly distributed around the circumference of the rotating shaft of the rotor.

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