A magnetic steel temperature-limiting control valve

Abstract

The present invention discloses a magnetic steel temperature-limiting control valve, which comprises a valve body, a valve core arranged in the valve body, a temperature-sensitive soft magnetic body and a hard magnetic body sleeved on the valve core, and a spring arranged between the temperature-sensitive soft magnetic body and the hard magnetic body; a drain channel is axially formed in the valve core, and the drain channel is communicated with the water inlet and the water outlet of the valve body; the temperature-sensitive soft magnetic body can slide relative to the valve core, and the hard magnetic body is fixedly connected with the valve body. The temperature-sensitive soft magnetic body and the hard magnetic body can have a magnetic force effect, and the temperature-sensitive soft magnetic body can block the communication between the water inlet of the valve body and the drain channel. Since a pure mechanical temperature-limiting control method is adopted, there is no need to additionally arrange a plurality of electronic components for electrical control, the cost is low, it is safer and more reliable, false alarms or malfunctions will not occur, and the service life is longer.

Description

Technical Field

[0001] The present invention relates to the field of liquid control valves, and particularly to a magnetic steel temperature-limiting control valve. Background Art

[0002] Currently, the control valves on the market mainly achieve temperature electrical control through temperature sensors and electromagnetic coils. Such control valves require electronic control board program control, and electronic products are prone to detection failure, false alarms, etc. during long-term use. Moreover, there are a series of deficiencies such as complex structure, high cost, and large volume.

[0003] It can be seen that the existing technology still needs to be improved. Summary of the Invention

[0004] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a magnetic steel temperature-limiting control valve, aiming to solve the technical problems of existing control valves caused by electrical control by using a pure mechanical automatic temperature control structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A magnetic steel temperature-limiting control valve includes a valve body, a valve core disposed in the valve body, a temperature-sensitive soft magnetic body and a hard magnetic body sleeved on the valve core, and an elastic member disposed between the temperature-sensitive soft magnetic body and the hard magnetic body; a drainage channel is axially formed in the valve core, and the drainage channel is communicated with the water inlet and outlet of the valve body; the temperature-sensitive soft magnetic body can slide relative to the valve core, and the hard magnetic body is fixedly connected to the valve body; a magnetic force can act between the temperature-sensitive soft magnetic body and the hard magnetic body, and the temperature-sensitive soft magnetic body can block the communication between the water inlet of the valve body and the drainage channel.

[0007] The valve body includes an upper housing and a lower housing disposed at the bottom of the upper housing. The water inlet is disposed on the side wall of the upper housing, and the water outlet is disposed on the lower housing.

[0008] The valve core includes a fixed part, an interface part, and a guiding cylinder connected in sequence from top to bottom. A limiting shoulder is disposed at the top of the guiding cylinder. The inner cavity of the upper housing is divided into a cylindrical first cavity and a second cavity. The diameter of the first cavity is smaller than that of the second cavity. A step is formed between the first cavity and the second cavity, and the height of the step is flush with the bottom surface height of the limiting shoulder. An annular sealing pad is disposed at the top of the temperature-sensitive soft magnetic body, and the annular sealing pad can be pressed against the bottom surface of the limiting shoulder and the step.

[0009] The temperature-sensitive soft magnet includes a first circular ring portion and a second circular ring portion which are integrally provided. The second circular ring portion is provided at the bottom of the first circular ring portion, and the outer diameter of the second circular ring portion is smaller than that of the first circular ring portion. The annular sealing gasket is provided at the top of the second circular ring portion; the elastic member is a spring, the spring is sleeved on the second circular ring portion, one end of the spring abuts against the bottom surface of the first circular ring portion, and the other end abuts against the top of the hard magnet.

[0010] The fixing portion includes a connecting column and a sealing column. An installation hole for the connecting column to pass through is formed in the upper housing. A first sealing ring is sleeved on the sealing column, and the first sealing ring is used to block liquid from passing between the sealing column and the inner wall of the upper housing.

[0011] A second sealing ring is sleeved on the guiding cylinder, and the second sealing ring is used to block liquid from passing between the guiding cylinder and the inner wall of the lower housing.

[0012] The drainage channel includes a first drainage hole formed on the side wall of the interface portion, a second drainage hole arranged along the axial direction of the interface portion, and a third drainage hole axially penetrating through the guiding portion. The first drainage hole, the second drainage hole, and the third drainage hole are sequentially communicated.

[0013] The upper housing and the lower housing are connected by threads, and the hard magnet is fixedly connected to the top of the lower housing.

[0014] Beneficial effects:

[0015] The present invention provides a magnetic steel temperature-limiting control valve. The drainage channel is arranged in the valve core. The temperature-sensitive soft magnet in the magnetic steel changes its magnetic state as the water temperature rises, and accordingly attracts or separates from the hard magnet in the magnetic steel, so as to control the connection or disconnection between the water inlet of the valve body and the drainage channel. Compared with the existing control valves, the magnetic steel temperature-limiting control valve has a more compact structure and a smaller volume; since it adopts a pure mechanical temperature-limiting control method, there is no need to additionally install multiple electronic components for electrical control, with low cost, higher safety and reliability, no false alarms or malfunctions will occur, and the service life is longer. Description of the drawings

[0016] Figure 1 It is a schematic structural diagram of the magnetic steel temperature-limiting control valve provided by the present invention in the open state.

[0017] Figure 2 It is a schematic structural diagram of the magnetic steel temperature-limiting control valve provided by the present invention in the closed state.

[0018] Figure 3 It is a schematic structural diagram of the valve core in the magnetic steel temperature-limiting control valve provided by the present invention. Detailed implementation manners

[0019] The present invention provides a magnetic steel temperature-limiting control valve. To make the objectives, technical solutions and effects of the present invention clearer and more definite, the following further describes the present invention in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0020] Please refer to Figures 1-3 , the present invention provides a magnetic steel temperature-limiting control valve, which includes a valve body 1, a valve core 2 arranged in the valve body, a temperature-sensitive soft magnet 3 and a hard magnet 4 sleeved on the valve core, and an elastic member 5 arranged between the temperature-sensitive soft magnet 3 and the hard magnet 4; a drain channel 6 is axially opened in the valve core, and the drain channel 6 is communicated with the water inlet 11 and the water outlet 12 of the valve body 1; the temperature-sensitive soft magnet 3 can slide relative to the valve core 2, and the hard magnet 4 is fixedly connected to the valve body 2; a magnetic force action can occur between the temperature-sensitive soft magnet 3 and the hard magnet 4 (the two magnets attract or repel each other), and the temperature-sensitive soft magnet 3 can block the communication between the water inlet 11 of the valve body and the drain channel 6. Here, the magnetic steel refers to the structural combination of the temperature-sensitive soft magnet and the hard magnet.

[0021] In this embodiment, the elastic member is a spring, and a magnetic attraction action can occur between the temperature-sensitive soft magnet 3 and the hard magnet 4. The water inlet 11 of the magnetic steel temperature-limiting control valve is connected to the water tank 8. When the water temperature in the water tank 8 is lower than the Curie temperature value initially set by the temperature-sensitive soft magnet 3, the temperature-sensitive soft magnet 8 has magnetism, a magnetic attraction action occurs between the temperature-sensitive soft magnet 3 and the hard magnet 4, and the temperature-sensitive soft magnet 2 overcomes the elastic force of the spring 5 and is attracted to the hard magnet 4. The communication between the water inlet of the valve body 1 and the drain channel is unobstructed, and the water in the water tank flows through the water inlet 11, the drain pipe 6, and the water outlet 12 in sequence and then is discharged (the path is shown in Figure 1as shown by the arrow); as the water in the water tank 8 is continuously heated and its temperature rises, the temperature-sensitive soft magnet 3 in the water flow is also heated and its temperature rises. When the temperature of the temperature-sensitive soft magnet 3 gradually reaches or exceeds its Curie temperature, the temperature-sensitive soft magnet 3 is demagnetized by heating (completely loses its magnetism), and the elastic force of the spring 5 pushes the temperature-sensitive soft magnet 3 to move axially along the valve body 1, so that the temperature-sensitive soft magnet 3 moves away from the hard magnet 4, and the temperature-sensitive soft magnet 3 blocks the communication between the water inlet 11 of the valve body 1 and the drain channel 6, preventing the water in the water tank 8 from draining away. It can be seen that the magnetic steel temperature-limiting control valve provided by the present invention has a compact structure and a small volume. Since it adopts a pure mechanical temperature-limiting control method, compared with the existing control valves, it does not need to additionally install multiple electronic components for electrical control, has a low cost, is safer and more reliable, will not have false alarms or malfunctions, and has a longer service life. In practical applications, the magnetic steel temperature-limiting control valve can be applied to electrical appliances such as water heaters to play a role in restricting the discharge of overheated water and protecting against overheating for the human body to prevent users from being scalded. It should be noted that the technical solution provided by the present invention is not only applicable to water, but also applicable to other liquids. The change of the liquid object does not change the essence of the technical solution of the present invention and also falls within the protection scope of the present invention.

[0022] In another embodiment, the elastic member is a tension spring, and the two ends of the tension spring are respectively fixedly connected to the temperature-sensitive soft magnet and the hard magnet, and a magnetic repulsive force can occur between the temperature-sensitive soft magnet and the hard magnet. When the water temperature in the water tank is lower than the Curie temperature value initially set by the temperature-sensitive soft magnet, the temperature-sensitive soft magnet has magnetism, and a magnetic repulsive force occurs between the temperature-sensitive soft magnet and the hard magnet, and the temperature-sensitive soft magnet overcomes the tension of the tension spring and moves away from the hard magnet, and the communication between the water inlet of the valve body and the drain channel is unobstructed, and the water in the water tank flows through the water inlet, the drain pipe, and the water outlet in sequence and then is discharged; as the water in the water tank is continuously heated and its temperature rises, the temperature-sensitive soft magnet in the water flow is also heated and its temperature rises. When the temperature of the temperature-sensitive soft magnet gradually reaches or exceeds its Curie temperature, the temperature-sensitive soft magnet is demagnetized by heating (completely loses its magnetism), and the tension of the tension spring pulls the temperature-sensitive soft magnet to move axially along the valve body, so that the temperature-sensitive soft magnet approaches the hard magnet, and at the same time the temperature-sensitive soft magnet blocks the communication between the water inlet of the valve body and the drain channel, preventing the water in the water tank from draining away.

[0023] Specifically, the valve body 1 includes an upper housing 13 and a lower housing 14 provided at the bottom of the upper housing. The water inlet 11 is provided on the side wall of the upper housing 13, and the water outlet 12 is provided on the lower housing 14.

[0024] Further, the valve core 2 includes a fixing part 21, an interface part 22, and a guiding cylinder 23 connected in sequence from top to bottom. A limiting shoulder 23.1 is provided at the top of the guiding cylinder 2. The inner cavity of the upper housing 13 is divided into a cylindrical first cavity 13.1 and a second cavity 13.2. The diameter of the first cavity 13.1 is smaller than that of the second cavity 13.2. A step 16 is formed between the first cavity 13.1 and the second cavity 13.2. The height of this step 16 is flush with the bottom surface height of the limiting shoulder 23.1. An annular sealing gasket 7 is provided at the top of the temperature-sensitive soft magnet 3. When the temperature-sensitive soft magnet is demagnetized, the spring 5 pushes the temperature-sensitive soft magnet 3 upward, and the annular sealing gasket 7 is pressed against the bottom surface of the limiting shoulder 23.1 and the step 16, effectively blocking the leakage of liquid from between the limiting shoulder 23.1 and the inner wall of the upper housing 13 into the drainage channel 6, completely blocking the communication between the water outlet 11 and the drainage channel 6, and ensuring the sealing performance of the control valve in the current-limiting state.

[0025] Preferably, the temperature-sensitive soft magnet 3 includes a first ring part 3.1 and a second ring part 3.2 integrally arranged. The second ring part 3.2 is arranged at the bottom of the first ring part 3.1. The outer diameter of the second ring part 3.2 is smaller than that of the first ring part 3.1. The annular sealing gasket is arranged at the top of the second ring part; the elastic member is a spring. The spring 5 is sleeved on the second ring part 3.2. One end of the spring 5 abuts against the bottom surface of the first ring part 3.1, and the other end abuts against the top of the hard magnet 4. The spring 5 is sleeved on the second ring part 3.2, always ensuring that the spring 5 is between the first ring part 3.1 and the hard magnet 4, preventing the spring from shifting and loosening, and ensuring the uniform force of the spring on the temperature-sensitive soft magnet.

[0026] Specifically, see Figure 3 The fixing part 21 includes a connecting column 21.1 and a sealing column 21.2. An installation hole 15 for the connecting column to pass through is provided on the upper housing 13. The connecting column can be connected to an external fixing structure, facilitating the installation of the control valve; a first sealing ring 8 is sleeved on the sealing column. The first sealing ring 8 is located between the outer wall of the sealing column 21.2 and the inner wall of the upper housing 13. By providing the first sealing ring 8, the leakage of liquid from the installation hole 15 to the outside of the valve body can be prevented, ensuring the sealing performance inside the valve body. For the convenience of installing and positioning the first sealing ring, a first card slot for installing the first sealing ring is provided on the sealing column.

[0027] To prevent the leakage of liquid from between the outer wall of the guiding cylinder 23 and the inner wall of the lower housing 14, a second sealing ring 9 is sleeved on the guiding cylinder. The second sealing ring is located between the guiding cylinder 23 and the lower housing 14. For the convenience of installing and positioning the second sealing ring, a second card slot for installing the second sealing ring is provided on the guiding cylinder.

[0028] In this embodiment, see Figure 3, the drainage channel 6 includes a first drainage hole 61 opened on the side wall of the interface portion, a second drainage hole 62 arranged along the axial direction of the interface portion, and a third drainage hole 63 axially penetrating the guiding portion. The first drainage hole 61, the second drainage hole 62, and the third drainage hole 63 are communicated in sequence. The drainage channel makes full use of the internal space of the valve core, eliminating the need for an additional drainage channel, thus making the structure of the control valve more compact and smaller in volume.

[0029] Preferably, the upper housing 13 and the lower housing 14 are connected by threads, facilitating disassembly and assembly; the hard magnet 4 is fixedly connected (such as by gluing) to the top of the lower housing 14.

[0030] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A magnetic steel temperature-limiting control valve, characterized in that, It includes a valve body, a valve core arranged in the valve body, a temperature-sensitive soft magnet and a hard magnet sleeved on the valve core, and an elastic member arranged between the temperature-sensitive soft magnet and the hard magnet; a drainage channel is axially formed in the valve core, and the drainage channel is communicated with the water inlet and the water outlet of the valve body; the temperature-sensitive soft magnet can slide relative to the valve core, and the hard magnet is fixedly connected to the valve body; the temperature-sensitive soft magnet and the hard magnet can generate a magnetic force, and the temperature-sensitive soft magnet can block the communication between the water inlet of the valve body and the drainage channel; the valve body includes an upper shell and a lower shell arranged at the bottom of the upper shell, the water inlet is arranged on the side wall of the upper shell, and the water outlet is arranged on the lower shell; the valve core includes a fixed part, an interface part and a guiding cylinder which are sequentially connected from top to bottom, a limiting shoulder is arranged at the top of the guiding cylinder, the inner cavity of the upper shell is divided into a cylindrical first cavity and a second cavity, the diameter of the first cavity is smaller than that of the second cavity, a step is formed between the first cavity and the second cavity, the height of the step is flush with the bottom surface height of the limiting shoulder, and an annular sealing gasket is arranged at the top of the temperature-sensitive soft magnet, and the annular sealing gasket can be pressed against the bottom surface of the limiting shoulder and the step; the temperature-sensitive soft magnet includes a first ring part and a second ring part which are integrally arranged, the second ring part is arranged at the bottom of the first ring part, the outer diameter of the second ring part is smaller than that of the first ring part, and the annular sealing gasket is arranged at the top of the first ring part; the elastic member is a spring, the spring is sleeved on the second ring part, one end of the spring is pressed against the bottom surface of the first ring part, and the other end is pressed against the top of the hard magnet; the upper shell and the lower shell are connected by threads, and the hard magnet is fixedly connected to the top of the lower shell.

2. The magnet steel temperature-limiting control valve according to claim 1, wherein The fixed part includes a connecting column and a sealing column, an installation hole for the connecting column to pass through is formed in the upper shell, and a first sealing ring is sleeved on the sealing column, and the first sealing ring is used to block the liquid from passing between the sealing column and the inner wall of the upper shell.

3. The magnetic steel temperature-limiting control valve according to claim 2, wherein, A second sealing ring is sleeved on the guiding cylinder, and the second sealing ring is used to block the liquid from passing between the guiding cylinder and the inner wall of the lower shell.

4. The magnet steel temperature limit control valve according to claim 1, characterized in that, The drainage channel includes a first drainage hole formed on the side wall of the interface part, a second drainage hole arranged axially along the interface part, and a third drainage hole axially penetrating the guiding part, and the first drainage hole, the second drainage hole and the third drainage hole are sequentially communicated.

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