CN115560122A - Water pipe valve for limiting highest temperature of water flow and working method thereof - Google Patents

Abstract

The invention discloses a water pipe valve for limiting the highest temperature of water flow and a working method thereof, relating to the technical field of valves and comprising a shell; the rubber hose is arranged in the shell, heat transfer rubber which is in contact with the rubber hose is arranged outside the rubber hose, and the heat transfer rubber is connected with a shape memory alloy spring; the valve core mechanism comprises shape memory alloy curved sheets and a filtering component, one ends of the shape memory alloy curved sheets are enclosed to form a closed end, and the other ends of the shape memory alloy curved sheets are connected with the filtering component; the two core penetrating rods are symmetrically arranged on two sides of the rubber hose; the two magnets penetrate through the core bar, and the magnetic poles at the opposite sides of the two magnet blocks are opposite; the electromagnet mechanism comprises coils, an iron core, a gate and a power supply, wherein the two coils, the power supply and the gate are connected in series through a conducting wire to form a loop, and the gate is driven by a shape memory alloy spring. The invention can realize that the valve is automatically closed when the water temperature is too high and is automatically opened when the water temperature is proper while filtering water.

Description

Water pipe valve for limiting highest temperature of water flow and working method thereof

Technical Field

The invention relates to the technical field of valves, in particular to a water pipe valve for limiting the highest temperature of water flow and a working method thereof.

Background

At present, in the aspects of life and industry such as solar water heaters, floor heating, ground source heat pumps, industrial waste heat and wastewater and the like, the flow and the purity of hot water are all required to be controlled. However, most of the existing systems for controlling water flow to be closed and water purifying devices are separated and are installed at water inlets, and common angle valves in the market need manual on-off control, are inconvenient to use, are not provided with a water temperature measuring instrument and an on-off device according to water temperature control, cannot be automatically disconnected when the water temperature reaches a certain overhigh temperature, are easy to cause scalding accidents, and can also influence the service life of the valves due to high temperature.

Therefore, it is an urgent need to solve the problem of providing a valve capable of filtering water and closing when the water temperature reaches a certain temperature.

Disclosure of Invention

In view of this, the present invention provides a water pipe valve for limiting the highest temperature of water flow and a working method thereof, which aims to solve the problems in the background art, and can monitor the water temperature while filtering water, and automatically close the valve when the water temperature is too high, and automatically open the valve when the water temperature is suitable.

On one hand, the invention provides a water pipe valve for limiting the highest temperature of water flow, which specifically adopts the following technical scheme:

a water line valve for limiting maximum water flow temperature, comprising:

a housing;

the rubber hose is arranged in the shell, the two ends of the rubber hose are respectively connected with a water inlet pipe and a water outlet pipe, filter plates are arranged inside the water inlet pipe and the water outlet pipe, heat transfer rubber which is in contact with the rubber hose is arranged outside the rubber hose, and a shape memory alloy spring is connected to the heat transfer rubber;

the valve core mechanism is arranged inside the rubber hose and comprises a plurality of shape memory alloy curved pieces and a filtering component, one end of each of the plurality of shape memory alloy curved pieces is enclosed to form a closed end, and the other end of each of the plurality of shape memory alloy curved pieces is connected with the filtering component;

the two core penetrating rods are symmetrically arranged on two sides of the rubber hose, the middle parts of the two core penetrating rods are lower than two ends, and the two ends of each core penetrating rod are respectively connected with the shell on the corresponding side;

two magnet blocks are arranged, the two magnet blocks can be slidably arranged on the core penetrating rod on two sides of the rubber hose in a penetrating mode, and magnetic poles on opposite sides of the two magnet blocks are opposite;

the electromagnet mechanism comprises two coils, an iron core, a gate and a power supply, wherein the two coils are arranged at two ends of the core penetrating rod respectively, the iron core is arranged in each coil in a penetrating mode, the two coils, the power supply and the gate are connected in series through a conducting wire to form a loop, and the gate is driven by the shape memory alloy spring to be switched on and off.

Furthermore, the filtering component comprises a nanometer water purification film and an activated carbon adsorption net, the nanometer water purification film is in an umbrella-shaped structure, one end, far away from the closed end, of the shape memory alloy curved piece is connected with the nanometer water purification film, and the activated carbon adsorption net is arranged on the nanometer water purification film.

Furthermore, the activated carbon adsorption net is divided into a disc-shaped structure and a sector-shaped structure, the activated carbon adsorption net in the disc-shaped structure is arranged in the middle of the nanometer water purification film, the activated carbon adsorption nets in the sector-shaped structure are multiple, and the activated carbon adsorption nets in the sector-shaped structure are arranged on the periphery of the activated carbon adsorption net in the disc-shaped structure in an annular array mode and are respectively connected with the nanometer water purification film.

Furthermore, two ends of the rubber hose are respectively connected with the water inlet pipe and the water outlet pipe through bayonets.

On the other hand, the invention also provides a working method of the water pipe valve for limiting the highest temperature of water flow, which specifically adopts the following technical scheme:

a working method of a water pipe valve for limiting the highest water flow temperature comprises the following steps:

s10, water is introduced into the water inlet pipe, when the temperature of hot water in the rubber hose reaches the minimum expansion temperature at which the shape memory alloy spring and the shape memory alloy bent piece deform, the heat transfer rubber transfers the temperature inside the rubber hose to the shape memory alloy spring, the shape memory alloy spring extends and deforms to disconnect the gate, the magnet block is separated from the coil, the magnet block slides to the position of the rubber hose along with the core penetrating rod, the shape memory alloy bent piece straightens and deforms and moves towards the direction of the filter plate in the water inlet pipe, the magnet blocks with opposite magnetic poles on two opposite surfaces attract each other to enable the rubber hose to be extruded and closed, and the valve is in a closed state to prevent the hot water in the rubber hose from flowing;

s20, when the temperature of hot water in the rubber hose is reduced to the minimum expansion temperature at which the shape memory alloy spring and the shape memory alloy curved piece deform, the heat transfer rubber transfers the temperature inside the rubber hose to the shape memory alloy spring, then the shape memory alloy spring contracts to deform, so that the gate is closed, the magnet block and the coil attract each other, the shape memory alloy curved piece moves towards the direction of the filter plate in the water outlet pipe under the action of gravity, the shape memory alloy curved piece contracts to deform to recover the original shape, the rubber hose is supported, the filter assembly is supported on the inner wall of the rubber hose, the filter assembly works, and the valve is in an open state;

and S30, when the water temperature rises to the minimum expansion and contraction temperature of the deformation of the shape memory alloy spring and the shape memory alloy bent piece again, repeating the steps S10 and S20, and circulating in sequence to achieve the purposes of purifying water and controlling hot water at a certain preset temperature to pass through.

According to the technical scheme, the water pipe valve for limiting the highest temperature of water flow and the working method thereof are characterized in that the shape memory alloy bent piece and the filtering component are arranged in the rubber hose, the heat transfer rubber is arranged outside the rubber hose, the coil and the magnet block are respectively arranged on two sides of the rubber hose, the shape memory alloy spring is arranged on a circuit, the heat transfer rubber can sense the temperature of the water flow in the rubber hose and transmit the temperature to the shape memory alloy spring, the induction monitoring effect on the temperature of the water flow is realized, the on-off of the circuit is controlled by the shape memory alloy spring according to the change of the temperature, the two magnet blocks can be controlled to be adsorbed on the coil or the rubber hose, the on-off of the valve is realized, when the valve is in an opening state, the shape memory alloy bent piece in the rubber hose shrinks and deforms under the temperature of the water in the rubber hose, the shape memory alloy bent piece supports the rubber hose and supports the filtering component in the rubber hose, the filtering effect on the hot water flowing through the rubber hose is realized, and the valve is automatically closed when the water temperature is high and is suitable for being automatically opened.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a water pipe valve for limiting the maximum temperature of water flow according to the present invention in an open state;

FIG. 2 is a schematic structural diagram of a state when a water pipe valve for limiting the highest temperature of water flow provided by the invention is closed;

FIG. 3 is a schematic view of the natural state of the shape memory alloy curved piece of the present invention;

FIG. 4 is a schematic structural view of a curved shape memory alloy plate according to the present invention in a straightened state;

FIG. 5 is a schematic structural view of a shape memory alloy spring, a gate and a heat transfer rubber provided by the present invention;

FIG. 6 is a schematic structural view of the core bar and the magnet block provided by the present invention;

FIG. 7 is a schematic diagram of an electromagnet mechanism provided by the present invention;

fig. 8 is a schematic structural view of the rubber hose and the heat transfer rubber provided by the present invention.

Wherein: 1 is a filter plate; 2 is a water inlet pipe; 3 is a shape memory alloy spring; 4 is a gate; 5 heat transfer rubber; 6 is a rubber hose; 7 is a lead; 8 is a nano water purifying film; 9 is an activated carbon adsorption net; 10 is a shape memory alloy curved sheet; 11 is a core penetrating rod; 12 is a magnet block; 13 is a coil; 14 is a bayonet; 15 is an iron core; 16 is a shell; 17 is a power supply; 18 is a snap bolt; and 19 is a water outlet pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In one aspect, referring to fig. 1 to 8, an embodiment of the present invention discloses a water pipe valve for limiting a maximum temperature of water flow, including: the device comprises a shell 16, a rubber hose 6, a valve core mechanism, a core penetrating rod 11, a magnet block 12 and an electromagnet mechanism.

The housing 16 is made of an alloy material, and the side length of the housing 16 is 300mm to 500mm, preferably 400mm.

The rubber hose 6 is arranged in the shell 16, the two ends of the rubber hose 6 are respectively connected with the water inlet pipe 2 and the water outlet pipe 19, the filter plates 1 are arranged inside the water inlet pipe 2 and the water outlet pipe 19, the heat transfer rubber 5 which is in contact with the rubber hose 6 is arranged outside the rubber hose 6, and the shape memory alloy spring 3 is connected on the heat transfer rubber 5; the inner diameter of the rubber hose 6 is 30mm to 100mm, the free length of the shape memory alloy spring 3 is 30mm to 50mm, and the free length of the shape memory alloy spring 3 is preferably 45mm.

The rubber is a typical amorphous polymer because of high elasticity during the use process, and a uniform compact ordered crystal structure or charge carriers required by heat transfer hardly exist in a rubber matrix, so that the heat conduction performance of the rubber is poor. The rubber is a poor conductor of heat and electricity, and in order to improve the heat-conducting property of the rubber, metal or inorganic filler with high heat conductivity is adopted to fill the rubber, namely the heat-transfer rubber; the thermal conductivity of the heat transfer rubber depends on the synergistic effect of rubber and heat-conducting filler, and the existing heat transfer rubber comprises but is not limited to heat-conducting silicone rubber, heat-conducting butadiene rubber, heat-conducting natural rubber, heat-conducting nitrile rubber and the like; preferably, the heat transfer rubber can be selected from heat-conducting nitrile rubber; in the invention, the heat transfer rubber is arranged on the outer wall of the rubber hose in a contact manner, so that the temperature of water flow in the rubber hose can be instantly transferred to the shape memory alloy spring; the shape memory alloy spring 3 is made by winding CuZnAl memory alloy wire, utilizes the two-way memory effect of the shape memory alloy, is a temperature sensing driving element which can automatically stretch and retract along with the change of temperature, takes hot water as a heat source, the stretching temperature is 80-95 ℃, the free state, namely 45mm at low temperature (room temperature), the stretching state, namely 200mm at high temperature (80-95 ℃), and the water inlet pipe 2 and the water outlet pipe 19 both adopt PVC pipes. In other embodiments, according to the controlled water temperature, the shape memory alloy spring 3 made of other materials can be selected; the heat transfer rubber and the shape memory alloy spring are jointly adopted to sense and respond the temperature of water flow in the rubber hose, so that the water temperature monitoring effect is achieved.

The valve core mechanism is arranged inside the rubber hose 6 and comprises a plurality of shape memory alloy curved pieces 10 and a filtering component, wherein one ends of the plurality of shape memory alloy curved pieces 10 are enclosed to form a closed end, and the other ends of the plurality of shape memory alloy curved pieces 10 are connected with the filtering component; the thickness of the shape memory alloy curved piece 10 is 5 mm-10 mm, the length is 15 mm-25 mm, preferably, the thickness of the shape memory alloy curved piece 10 is 8mm, the length is 20mm, the material of the shape memory alloy curved piece 10 is the same as that of the shape memory alloy spring 3, in the embodiment, the shape memory alloy curved piece 10 is arranged into four pieces, and one end of each four pieces of shape memory alloy curved piece 10 is encircled to form a square closed end. The other end of the four-piece shape memory alloy curved piece 10 is a free end, and the free end is connected with the filter assembly.

The number of the core penetrating rods 11 is two, the two core penetrating rods 11 are symmetrically arranged on two sides of the rubber hose 6, the middle parts of the two core penetrating rods 11 are lower than two ends, and two ends of each core penetrating rod 11 are respectively connected with the shell 16 on the corresponding side; the diameter of the core penetrating rod 11 is 10 mm-20 mm, and preferably, the diameter of the core penetrating rod 11 is 15mm.

Two magnet blocks 12 are arranged, the two magnet blocks 12 are slidably arranged on the core penetrating rods 11 at two sides of the rubber hose 6 in a penetrating way, and the magnetic poles at the opposite sides of the two magnet blocks 12 are opposite; the magnet block 12 has a length of 30mm to 100mm, a width of 10mm to 50mm, and a thickness of 10mm to 30mm.

The electromagnet mechanism comprises coils 13, iron cores 15, a gate 4 and a power supply 17, wherein the number of the coils 13 is two, the two coils 13 are respectively arranged at two ends of a core penetrating rod 11, the iron cores 15 are arranged in each coil 13 in a penetrating mode, the two coils 13, the power supply 17 and the gate 4 are connected in series through a conducting wire 7 to form a loop, the gate 4 is driven through a shape memory alloy spring 3 to achieve the on-off of the loop, and the winding number of the coils 13 can be specifically adjusted according to the size of required magnetic force.

It should be noted that: because the expansion temperature of the materials of the shape memory alloy spring 3 and the shape memory alloy curved piece 10 is 80-95 ℃, warm water flowing out of the valve needs to be controlled to be below 80 ℃, when the temperature in the rubber hose 6 reaches 80 ℃, the heat transfer rubber 5 transfers the sensed water temperature in the rubber hose 6 to the shape memory alloy spring 3, the shape memory alloy spring 3 and the shape memory alloy curved piece 10 are both subjected to extension deformation, when the shape memory alloy spring 3 is subjected to extension deformation, the gate 4 breaks a loop, the magnet block 12 is separated from the coil 13, the magnet block 12 slides to two sides of the rubber hose 6 along with the core penetrating rod 11, meanwhile, the shape memory alloy curved piece 10 in the rubber hose 6 is also subjected to extension deformation, the natural bending shape is changed into a straightening state, the shape memory alloy curved piece 10 moves towards the direction of the filter plate 1 in the water inlet pipe 2 under the extrusion of the two magnet blocks 12, finally the two magnet blocks 12 extrude and close the rubber hose 6, the valve is in a closed state, and hot water exceeding 80 ℃ in the rubber hose 6 is prevented from flowing through, the hot water is further used for a long time, and the service life of the water pipe is influenced. When the water temperature in the rubber hose 6 is reduced to 80 ℃ from more than 80 ℃, the heat transfer rubber 5 transfers the water temperature sensed in the rubber hose 6 to the shape memory alloy spring 3, the shape memory alloy spring 3 and the shape memory alloy curved piece 10 are contracted and deformed from an extension state to a natural state, the gate 4 closes a loop, the magnet block 12 and the coil 13 are mutually attracted, the shape memory alloy curved piece 10 moves towards the filter plate 1 in the water outlet pipe 19 under the action of gravity, the shape memory alloy curved piece 10 is contracted and deformed to recover to an original state, the rubber hose 6 is supported, the filter assembly is supported on the inner wall of the rubber hose 6, the filter assembly is operated to filter water, and the valve is in an open state; meanwhile, when the temperature of water in the rubber hose 6 is lower than 80 ℃, the shape memory alloy spring 3 and the shape memory alloy curved piece 10 are in an original state, the gate 4 loop is in a closed state, the magnet block 12 and the coil 13 are mutually attracted, the shape memory alloy curved piece 10 is in a bent state and supports the rubber hose 6, so that the filtering component is supported on the inner wall of the rubber hose 6 in an opened state, the filtering component works to filter water, and the valve is in an opened state; that is to say, when the water temperature in the rubber hose 6 is reduced from 80 ℃ to 80 ℃ or below 80 ℃, the valve is in an open state, the filter assembly is in a spreading state, the water flow in the rubber hose 6 is filtered, and the water temperature flowing out from the valve is ensured to be below 80 ℃, so as to ensure the normal use of hot water, wherein the specific positions of the filter plates 1 in the water inlet pipe 2 and the water outlet pipe 19 are specifically set according to requirements, when the shape memory alloy curved piece 10 moves towards the water inlet pipe 2, the filter plate 1 in the water inlet pipe 2 plays a role in blocking the shape memory alloy curved piece 10, and when the shape memory alloy curved piece 10 descends under the action of gravity, the filter plate 1 in the water outlet pipe 19 plays a role in blocking the shape memory alloy curved piece 10.

Referring to fig. 3 and 4, in the present embodiment, preferably, the filtering assembly includes a nanometer water purifying film 8 and an activated carbon adsorption net 9, the nanometer water purifying film 8 is in an umbrella-shaped structure, one end of the plurality of shape memory alloy curved pieces 10 away from the closed end is connected to the nanometer water purifying film 8, and the activated carbon adsorption net 9 is disposed on the nanometer water purifying film 8. Wherein, the specification of the nanometer water purifying film 8 is 30 mm-100 mm.

Referring to fig. 3 and 4, in the present embodiment, preferably, the activated carbon adsorption net 9 is divided into a disc-shaped structure and a fan-shaped structure, the activated carbon adsorption net 9 in the disc-shaped structure is disposed in the middle of the nano water purification film 8, a plurality of activated carbon adsorption nets 9 in the fan-shaped structure are disposed around the activated carbon adsorption net 9 in the disc-shaped structure in an annular array manner, and are respectively connected to the nano water purification film 8. Specifically, the active carbon adsorption net 9 is the otter board, a plurality of meshs have on the otter board, the adsorption carbon is filled in the meshs, set up the active carbon adsorption net 9 interval of a plurality of fan-shaped structures on nanometer water purification film 8, the nanometer water purification film 8 of being convenient for is supported by shape memory alloy bent piece 10 and opens for the umbrella structure supports in the inside of rubber hose 6, when shape memory alloy bent piece 10 is for straightening the state, nanometer water purification film 8 is the umbrella structure that draws in, the edge of nanometer water purification film 8 and the inner wall separation of rubber hose 6.

Referring to fig. 8, in the present embodiment, both ends of the rubber hose 6 are connected with the water inlet pipe 2 and the water outlet pipe 19 through the bayonets 14, respectively. Specifically, a snap bolt 18 is provided at the bayonet 14, and both ends of the rubber hose 6 are respectively connected with the water inlet pipe 2 and the water outlet pipe 19 through the snap bolt 18.

On the other hand, the invention also provides a working method of the water pipe valve for limiting the highest temperature of water flow, which specifically adopts the following technical scheme:

a working method of a water pipe valve for limiting the highest water flow temperature comprises the following steps:

s10, water is introduced into the water inlet pipe 2, when the temperature of hot water in the rubber hose 6 reaches the minimum expansion temperature at which the shape memory alloy spring 3 and the shape memory alloy curved piece 10 deform, the heat transfer rubber 5 transfers the temperature in the rubber hose 6 to the shape memory alloy spring 3, the shape memory alloy spring 3 extends and deforms to disconnect the gate 4, the magnet block 12 is separated from the coil 13, the magnet block 12 slides to the soft rubber pipe along with the core penetrating rod 11, the shape memory alloy curved piece 10 straightens and deforms and moves towards the direction of the filter plate 1 in the water inlet pipe 2, the two magnet blocks 12 with opposite magnetic poles attract each other, the rubber hose 6 is extruded and closed, the valve is in a closed state, and the hot water in the rubber hose 6 is prevented from flowing;

s20, when the temperature of hot water in the rubber hose 6 is reduced to the minimum expansion temperature at which the shape memory alloy spring 3 and the shape memory alloy curved piece 10 deform, the heat transfer rubber 5 transfers the temperature in the rubber hose 6 to the shape memory alloy spring 3, then the shape memory alloy spring 3 contracts and deforms, so that the gate 4 is closed, the magnet block 12 and the coil 13 attract each other, the shape memory alloy curved piece 10 moves towards the filter plate 1 in the water outlet pipe 19 under the action of gravity, the shape memory alloy curved piece 10 contracts and deforms to recover to the original shape, the rubber hose 6 is supported, the filter assembly is supported on the inner wall of the rubber hose 6, the filter assembly works, and the valve is in an open state;

and S30, when the water temperature rises to the minimum expansion and contraction temperature of the deformation of the shape memory alloy spring 3 and the shape memory alloy bent piece 10 again, repeating the steps S10 and S20, and circulating in sequence to achieve the purposes of purifying water and controlling hot water at a certain preset temperature to pass through.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. A water line valve for limiting maximum water flow temperature, comprising:

a housing;

the rubber hose is arranged in the shell, the two ends of the rubber hose are respectively connected with a water inlet pipe and a water outlet pipe, filter plates are arranged inside the water inlet pipe and the water outlet pipe, heat transfer rubber which is in contact with the rubber hose is arranged outside the rubber hose, and a shape memory alloy spring is connected to the heat transfer rubber;

the valve core mechanism is arranged inside the rubber hose and comprises a plurality of shape memory alloy curved pieces and a filtering component, one end of each of the plurality of shape memory alloy curved pieces is enclosed to form a closed end, and the other end of each of the plurality of shape memory alloy curved pieces is connected with the filtering component;

the two core penetrating rods are symmetrically arranged on two sides of the rubber hose, the middle parts of the two core penetrating rods are lower than two ends, and two ends of each core penetrating rod are respectively connected with the shell on the corresponding side;

two magnet blocks are arranged, the two magnet blocks can be slidably arranged on the core penetrating rod on two sides of the rubber hose in a penetrating mode, and magnetic poles on opposite sides of the two magnet blocks are opposite;

the electromagnet mechanism comprises two coils, an iron core, a gate and a power supply, wherein the two coils are arranged at two ends of the core penetrating rod respectively, the iron core is arranged in each coil in a penetrating mode, the two coils, the power supply and the gate are connected in series through a conducting wire to form a loop, and the gate is driven by the shape memory alloy spring to be switched on and off.

2. The water pipe valve for limiting the highest temperature of water flow according to claim 1, wherein the filtering assembly comprises a nanometer water purifying film and an activated carbon adsorption net, the nanometer water purifying film has an umbrella-shaped structure, one end of the shape memory alloy curved piece, which is far away from the closed end, is connected with the nanometer water purifying film, and the activated carbon adsorption net is arranged on the nanometer water purifying film.

3. The water pipe valve for limiting the maximum temperature of water flow according to claim 2, wherein the activated carbon adsorption net is divided into a disc structure and a fan structure, the disc structure of the activated carbon adsorption net is arranged in the middle of the nanometer water purification film, a plurality of fan structures of the activated carbon adsorption net are arranged, and a plurality of fan structures of the activated carbon adsorption net are arranged on the periphery of the disc structure of the activated carbon adsorption net in an annular array and are respectively connected with the nanometer water purification film.

4. The water pipe valve for limiting the maximum temperature of water flow according to claim 1, wherein both ends of the rubber hose are respectively connected with the water inlet pipe and the water outlet pipe through bayonets.

5. A method for operating a water pipe valve for limiting the maximum temperature of water flow, which is characterized in that the water pipe valve for limiting the maximum temperature of water flow according to any one of the claims 1-4 is used, and comprises the following steps:

s10, water is introduced into the water inlet pipe, when the temperature of hot water in the rubber hose reaches the minimum expansion temperature at which the shape memory alloy spring and the shape memory alloy curved sheet deform, the heat transfer rubber transfers the temperature inside the rubber hose to the shape memory alloy spring, the shape memory alloy spring extends and deforms to break the gate, the magnet block is separated from the coil, the magnet block slides to the position of the rubber hose along with the core penetrating rod, the shape memory alloy curved sheet straightens and deforms and moves towards the direction of the filter plate in the water inlet pipe, the two magnet blocks with opposite magnetic poles on opposite surfaces attract each other to enable the rubber hose to be extruded and closed, and the valve is in a closed state to prevent the hot water in the rubber hose from flowing;

s20, when the temperature of hot water in the rubber hose is reduced to the minimum expansion temperature at which the shape memory alloy spring and the shape memory alloy curved piece deform, the heat transfer rubber transfers the temperature inside the rubber hose to the shape memory alloy spring, then the shape memory alloy spring contracts to deform, so that the gate is closed, the magnet block and the coil attract each other, the shape memory alloy curved piece moves towards the direction of the filter plate in the water outlet pipe under the action of gravity, the shape memory alloy curved piece contracts to deform to recover the original shape, the rubber hose is supported, the filter assembly is supported on the inner wall of the rubber hose, the filter assembly works, and the valve is in an open state;

and S30, when the water temperature rises to the minimum expansion and contraction temperature of the deformation of the shape memory alloy spring and the shape memory alloy bent piece again, repeating the steps S10 and S20, and circulating in sequence to achieve the purposes of purifying water and controlling hot water at a certain preset temperature to pass through.

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