Temperature control flow valve

Abstract

The utility model discloses a temperature control flow valve, which belongs to the technical field of valves, and comprises a valve body, a valve core, a temperature control valve core, a temperature control valve core, a temperature control valve core, a temperature control valve core and a temperature control valve core, and is characterized in that the valve body comprises a water inlet, a water outlet and a fluid passage; the adjusting part is arranged in the fluid channel and is close to the water outlet, and a liquid flow channel is formed in the adjusting part; the valve element is arranged in the fluid channel and comprises a base and a valve rod, a liquid passing hole communicated with the fluid channel is formed in the valve element, and a conical abutting part used for abutting against the fluid channel is arranged at the end, close to the adjusting piece, of the valve rod; the spring assembly comprises a memory alloy spring and a reset spring which are arranged on the two sides of the base respectively, and the spring assembly is configured to sense the temperature of fluid in the fluid channel so as to drive the valve element to be close to or away from the adjusting piece. Compared with the prior art, the temperature control flow valve is low in cost, high in sensitivity and accurate in flow control.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and in particular relates to a temperature-controlled flow valve. Background Technology

[0002] In industrial and civil applications, temperature-controlled flow valves, as control valves that automatically adjust the flow rate based on the temperature of the flowing medium, are widely used in various equipment and systems.

[0003] However, traditional temperature-controlled flow valves have some problems in practical applications. Traditional temperature-controlled flow valves mostly use temperature sensors and solenoid valves to control flow, which is costly and requires the circuitry to be installed inside the fluid, posing safety hazards. Furthermore, solenoid valves can only have two states, on and off, resulting in a sawtooth curve in the temperature change of the controlled medium, failing to achieve smooth and precise flow control and affecting system stability and performance. In addition, traditional temperature-controlled flow valves have a slow response speed and cannot adapt to temperature changes in a timely manner, causing lag in flow valve regulation and affecting the overall system efficiency and effectiveness. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a temperature control flow valve with fast response speed and precise flow control.

[0005] The technical solution of this utility model is:

[0006] This utility model provides a temperature-controlled flow valve, comprising:

[0007] The valve body includes an inlet and an outlet, and a fluid passage disposed between the inlet and the outlet;

[0008] An adjusting component is disposed within the fluid channel and near the outlet, and the adjusting component is provided with a liquid flow channel;

[0009] A valve core, disposed within the fluid channel, includes a base and a valve stem. The valve core is provided with a liquid passage hole communicating with the fluid channel, and the valve stem is provided with a tapered abutment portion at one end near the adjusting member for abutting against the liquid flow channel.

[0010] The spring assembly includes a shape memory alloy spring and a return spring respectively disposed on both sides of the base. The spring assembly is configured to sense the fluid temperature in the fluid channel to drive the valve core closer to or away from the regulating member.

[0011] Furthermore, when the fluid temperature is higher than the reference value, the reset spring is disposed between the valve body and the valve core, and the shape memory alloy spring is disposed between the valve core and the adjusting member.

[0012] Furthermore, when the fluid temperature is lower than the reference value, the shape memory alloy spring is disposed between the valve body and the valve core, and the reset spring is disposed between the valve core and the adjusting member.

[0013] Furthermore, the orthographic projection of the conical contact portion in the water flow direction is greater than the orthographic projection of the liquid flow channel.

[0014] Furthermore, the taper of the tapered abutment portion ranges from 45° to 60°.

[0015] Furthermore, the adjusting member includes a connecting side facing the conical abutment portion, and the connecting side is provided with a guide portion that matches the shape of the conical abutment portion.

[0016] Furthermore, the valve core is provided with a one-sided opening channel that communicates with the liquid flow channel. The one-sided opening channel is open on the side facing the water inlet and closed on the side facing the water outlet.

[0017] Furthermore, the liquid passage is provided on the valve stem, and the liquid passage is connected to the fluid channel via the single-sided opening channel.

[0018] Furthermore, the diameter of the fluid flow channel is larger than the diameter of the single-sided opening channel.

[0019] Furthermore, the valve body is provided with an extension wall extending into the fluid passage, the extension wall being configured to provide support for the spring assembly.

[0020] The beneficial technical effects of this utility model are:

[0021] This novel temperature-controlled flow valve, employing a spring assembly consisting of a shape memory alloy spring and a return spring, can sense changes in fluid temperature within the fluid channel and drive the valve core closer to or away from the regulating component, thereby enabling sensitive and precise control of fluid flow. This design eliminates the need for an external power supply and complex electrical control system, reducing costs and safety hazards. Simultaneously, the conical contact portion abuts against the fluid flow channel, allowing the valve core to more accurately control the flow rate during movement, improving regulation precision and avoiding the sawtooth-shaped temperature changes caused by the on / off switching of traditional solenoid valves. Furthermore, the rapid response of the shape memory alloy spring to temperature changes enhances the response speed of the temperature-controlled flow valve, enabling it to adapt to temperature changes promptly, reducing regulation lag, and improving the overall efficiency and effectiveness of the system. Moreover, this temperature-controlled flow valve has a simple structure, is easy to maintain and replace components, possesses good reliability and adaptability, and can operate stably in various working environments. Attached Figure Description

[0022] Figure 1 This is an exploded view of the structure of the temperature control flow valve conforming to the preferred embodiment of this utility model;

[0023] Figure 2 yes Figure 1 Cross-sectional view of a medium-temperature controlled flow valve;

[0024] Figure 3 yes Figure 1 A schematic diagram of the valve core structure.

[0025] Explanation of reference numerals in the attached figures:

[0026] Temperature-controlled flow valve 100, valve body 10, fluid channel 11, extension wall 12, through hole 13, inlet 14, outlet 15, valve core 20, base 21, protrusion 211, liquid passage groove 212, valve stem 22, liquid passage hole 221, single-sided opening channel 23, conical abutment part 24, adjusting part 30, liquid flow channel 31, guide part 32, sealing ring 33, spring assembly 40, shape memory alloy spring 41, return spring 42. Detailed Implementation

[0027] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0028] Please see Figures 1 to 3 As shown, this utility model provides a temperature-controlled flow valve 100, including a valve body 10, a valve core 20, an adjusting component 30, and a spring assembly 40. The spring assembly 40 includes a return spring 42 and a shape memory alloy spring 41.

[0029] The valve body 10, serving as the supporting structure for the entire temperature-controlled flow valve 100, includes an inlet 14 and an outlet 15, as well as a fluid channel 11 disposed between the inlet 14 and the outlet 15. The fluid channel 11 is a passageway for fluid to flow into. Optionally, the inner surface of the fluid channel 11 is smooth to reduce resistance during fluid flow.

[0030] Furthermore, the valve body 10 is provided with an extension wall 12 extending into the fluid channel 11, and the extension wall 12 is provided with a through hole 13 so that fluid can enter the fluid channel 11 of the valve body 10 through the through hole 13. The extension wall 12 provides support at one end of the spring assembly 40, ensuring the stable operation of the spring assembly 40.

[0031] The adjusting member 30 is positioned in the fluid channel 11 near the outlet 15. A liquid flow channel 31 for liquid outflow is provided on the adjusting member 30. By providing the liquid flow channel 31 on the adjusting member 30, the volume of the temperature-controlled flow valve 100 can be effectively reduced. By setting the adjusting member 30, the compression space of the return spring 42 and the shape memory alloy spring 41 is changed, adjusting their force balance, thereby regulating the fitting relationship between temperature and flow rate. Furthermore, when the pressure within the liquid flow channel 31 is high, it generates a certain hydraulic force on the valve core 20, altering the initial force balance of the return spring 42 and the shape memory alloy spring 41. By rotating the adjusting member 30, the influence of the hydraulic force on the force balance of the spring assembly 40 can be counteracted.

[0032] Specifically, the valve body 10 is provided with an internal thread, and the adjusting member 30 is provided with an external thread that matches the internal thread. By setting the internal and external threads, the installation position of the adjusting member 30 is changed, thereby changing the force balance between the return spring 42 and the shape memory alloy spring 41, and thus adjusting the fitting relationship between temperature and flow rate, that is, controlling the flow rate according to the temperature.

[0033] Furthermore, a sealing ring 33 is provided between the adjusting member 30 and the valve body 10 to improve the sealing performance of the temperature control flow valve 100 and improve the flow control accuracy.

[0034] The valve core 20 is disposed within the fluid channel 11 and includes a base 21 and a valve stem 22.

[0035] The base 21 has several outwardly extending protrusions 211, which abut against the cavity wall of the fluid channel 11. Preferably, the surface of the protrusion 211 that abuts against the cavity wall is an arc-shaped surface that matches the cavity wall, thereby reducing the friction between the valve core 20 and the cavity wall and improving the sliding performance of the valve core 20 in the fluid channel 11.

[0036] A fluid passage 212 is formed between two adjacent protrusions 211. The valve core 20 is provided with a fluid passage hole 221 that communicates with the fluid channel 11. By providing the fluid passage 212, some of the fluid in the fluid channel 11 can flow out quickly through the fluid passage 212, thereby being quickly sensed by the shape memory alloy spring 41, improving the sensitivity of the temperature control flow valve 100.

[0037] Furthermore, the valve core 20 is provided with a one-sided opening channel 23. This one-sided opening channel 23 is connected to the liquid flow channel 31, wherein the one-sided opening channel 23 is open on the side facing the inlet 14 and closed on the side facing the outlet 15. This arrangement allows some fluid to flow out through the one-sided opening channel 23, increasing the total flow rate of the thermostatic flow meter and facilitating flow rate adjustment.

[0038] Furthermore, the liquid passage 221 is disposed on the valve stem 22, and the liquid passage 221 is connected to the fluid channel 11 via the one-sided opening channel 23. This arrangement allows the fluid to enter the one-sided opening channel 23 from the liquid flow channel 31, and then flow through the liquid passage 221 to the shape memory alloy spring 41. The shape memory alloy spring 41 can more directly sense the temperature change of the fluid, thereby improving the accuracy and speed of temperature sensing.

[0039] In other words, in this embodiment, the fluid in the temperature-controlled flow valve 100 has two different flow paths from the inlet 14 to the outlet 15. When the fluid enters from the inlet 14, part of the fluid can flow directly to the regulating member 30 through the liquid passage 212, while the other part flows to the regulating member 30 through the single-sided opening channel 23 and the liquid passage 221. Both parts of the fluid must flow out through the liquid flow channel 31 on the regulating member 30. This arrangement enables more flexible and precise flow control, increases the fluid flow rate, and helps improve the response speed and regulation accuracy of the temperature-controlled flow valve 100, allowing it to adapt to changes in fluid temperature more quickly and accurately, ensuring stable operation of the system within the set temperature range.

[0040] In addition, the liquid passage 212 can prevent a large amount of fluid from impacting the base 21, thus avoiding changes in the position of the valve core 20 due to fluid impact, thereby maintaining the force balance between the spring assemblies 40, improving the stability and reliability of the thermostatic flow meter and improving the adjustment accuracy.

[0041] Furthermore, the orifice diameter of the liquid flow channel 31 is larger than that of the single-sided opening channel 23. This configuration improves the flow regulation range of the temperature-controlled flow meter, enhances the flexibility and adaptability of flow regulation, and enables the temperature-controlled flow valve 100 to achieve precise control over a wider flow range, better meeting the flow requirements of different application scenarios.

[0042] The valve stem 22 has a conical abutment portion 24 at one end near the adjusting member 30 for abutting against the liquid flow channel 31. By providing the conical abutment portion 24, the cone can be partially inserted into the liquid flow channel 31, increasing the fitting degree between the effective flow rate and temperature changes. The conical abutment portion 24 can more precisely control the opening of the liquid flow channel 31, thereby achieving fine-tuning of the flow rate. When the temperature changes, the conical abutment portion 24 can make the matching between flow rate and temperature more accurate.

[0043] Furthermore, the conical abutment portion 24 is in the direction of water flow ( Figure 2The orthographic projection of the conical abutment 24 (in the direction of the arrow shown) is larger than the orthographic projection of the fluid flow channel 31. This arrangement ensures that the conical abutment 24 effectively covers the entire opening area of ​​the fluid flow channel 31, thereby achieving more precise flow control. When the conical abutment 24 moves towards the fluid flow channel 31, its larger orthographic projection can more comprehensively block or guide fluid flow, reducing the possibility of fluid leakage from the edge of the fluid flow channel 31 and improving the valve's sealing performance and adjustment accuracy.

[0044] Furthermore, the taper of the conical contact portion 24 ranges from 45° to 60°. By changing the taper of the conical contact portion 24, a larger flow rate variation can be achieved within the same movement range of the valve core 20. This broadens the operating range of the temperature control flow valve 100, enabling it to effectively regulate flow rate over a wider temperature range and meet the needs of different application scenarios.

[0045] Furthermore, the outer surface of the conical abutment portion 24 is a slope, preferably an arc-shaped slope. When the liquid temperature is high, the cooperation between the shape memory alloy spring 41 and the return spring 42 enables precise adjustment of the liquid flow rate, quickly responding to temperature changes and further improving the accuracy of flow control.

[0046] Furthermore, the adjusting member 30 includes a connecting side facing the conical abutment portion 24, and the connecting side is provided with a guide portion 32 that matches the shape of the conical abutment portion 24. By providing the guide portion 32, the conical abutment portion 24 is provided with precise positioning and guidance, achieving more effective flow control and improving the adjustment accuracy and response speed of the temperature control flow valve 100.

[0047] The spring assembly 40 includes a shape memory alloy spring 41 and a return spring 42 respectively disposed on both sides of the base 21. The spring assembly 40 is configured to sense the fluid temperature within the fluid channel 11 to drive the valve core 20 closer to or further away from the regulating member 30. By configuring the spring assembly 40, the temperature-controlled flow valve 100 can respond to temperature changes and automatically adjust the flow rate, thus achieving reliable flow rate adjustment based on actual temperature and pressure with a more sensitive temperature response speed and control accuracy, without the need for any external power supply or control signal.

[0048] The shape memory alloy spring 41 is made of an alloy material with shape memory effect. Its grains are austenitic at high temperatures, exhibiting high shear modulus and elastic modulus; and martensitic at low temperatures, exhibiting lower shear modulus and elastic modulus. Because the elastic force of the shape memory alloy spring 41 is several times greater at high temperatures than at low temperatures, it can sense external temperature and respond accordingly. Since the shape memory alloy spring 41 has a force sensitivity of up to 0.1℃ to liquid temperature, it can respond to a temperature difference of 0.1℃. Furthermore, its response speed to rapid changes in liquid temperature is as high as 0.2 seconds. Therefore, the temperature-controlled flow valve 100 of this invention can quickly and accurately adjust the flow rate based on temperature changes, improving the response speed of the temperature-controlled flow valve 100.

[0049] Since the shape memory alloy spring 41 can have a fatigue life of up to one million or even ten million cycles and is resistant to general acid and alkali corrosion, it is suitable for long-life and corrosive working environments. Therefore, it can significantly improve the service life of the temperature control flow valve 100 and reduce maintenance costs.

[0050] The spring assembly 40 has two mounting methods.

[0051] When the fluid temperature is higher than the reference value, the reset spring 42 is disposed between the valve body 10 and the valve core 20, and the shape memory alloy spring 41 is disposed between the valve core 20 and the adjusting member 30. Figure 2 As shown, when the temperature is higher and the flow rate is greater: the return spring 42 is placed on the inlet 14 side, and the shape memory alloy spring 41 is placed on the outlet 15 side. The higher the temperature, the greater the elastic force of the shape memory alloy spring 41, and the valve core 20 is pushed towards the inlet 14 by the shape memory alloy spring 41. The gap between the conical abutment portion 24 of the valve core 20 and the liquid flow channel 31 of the regulating member 30 will be larger, and the flow rate will also be greater. Conversely, when the temperature decreases, the force of the shape memory alloy spring 41 weakens, and the valve core 20 is pushed towards the outlet 15 by the return spring 42. The gap between the conical abutment portion 24 of the valve core 20 and the liquid flow channel 31 of the regulating member 30 will decrease, and the flow rate will also decrease.

[0052] When the fluid temperature is below a reference value, the shape memory alloy spring 41 is positioned between the valve body 10 and the valve core 20, and the return spring 42 is positioned between the valve core 20 and the regulating member 30. That is, the lower the temperature and the higher the flow rate, the more the shape memory alloy spring 41 is positioned on the inlet 14 side, and the return spring 42 is positioned on the outlet 15 side. The higher the temperature, the greater the elastic force of the shape memory alloy spring 41, pushing the valve core 20 towards the regulating member 30. This reduces the gap between the conical portion of the valve core 20 and the fluid flow channel 31 of the regulating member 30, thus decreasing the flow rate. Conversely, when the temperature decreases, the force of the shape memory alloy spring 41 weakens, pushing the valve core 20 towards the inlet 14, increasing the gap between the conical abutment portion 24 of the valve core 20 and the fluid flow channel 31 of the regulating member 30, thus increasing the flow rate.

[0053] Furthermore, by fitting the stiffness of the shape memory alloy spring 41 under high and low temperature conditions, the temperature control flow valve 100 can meet the comprehensive requirements of water pressure, flow rate and temperature in different application scenarios by simply replacing the shape memory alloy spring 41, the return spring 42 and the adjusting component 30, without changing the basic structure. The structure is simple, the cost is low and the applicability is strong.

[0054] In summary, the temperature-controlled flow valve 100 of this invention, through a spring assembly 40 composed of a shape memory alloy spring 41 and a return spring 42, can sense changes in the fluid temperature within the fluid channel 11 and drive the valve core 20 to move closer to or away from the regulating component 30, thereby enabling sensitive and precise control of the fluid flow rate. This design eliminates the need for an external power supply and a complex electrical control system, reducing costs and safety hazards. Simultaneously, the conical abutment portion 24 abuts against the liquid flow channel 31, allowing the valve core 20 to more precisely control the flow rate during movement, improving regulation accuracy and avoiding the sawtooth temperature changes caused by the on / off switching of traditional solenoid valves. Furthermore, because the shape memory alloy spring 41 responds rapidly to temperature changes, it enhances the response speed of the temperature-controlled flow valve 100, enabling timely adaptation to temperature changes, reducing regulation lag, and improving the overall efficiency and effectiveness of the system. Moreover, the temperature-controlled flow valve 100 has a simple structure, is easy to maintain and replace components, possesses good reliability and adaptability, and can operate stably in different working environments.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A temperature-controlled flow valve, characterized in that, include: The valve body includes an inlet and an outlet, and a fluid passage disposed between the inlet and the outlet; An adjusting component is disposed within the fluid channel and near the outlet, and the adjusting component is provided with a liquid flow channel; A valve core, disposed within the fluid channel, includes a base and a valve stem. The valve core is provided with a liquid passage hole communicating with the fluid channel, and the valve stem is provided with a tapered abutment portion at one end near the adjusting member for abutting against the liquid flow channel. The spring assembly includes a shape memory alloy spring and a return spring respectively disposed on both sides of the base. The spring assembly is configured to sense the fluid temperature in the fluid channel to drive the valve core closer to or away from the regulating member.

2. The temperature-controlled flow valve according to claim 1, characterized in that, When the fluid temperature is higher than the reference value, the reset spring is disposed between the valve body and the valve core, and the shape memory alloy spring is disposed between the valve core and the adjusting member.

3. The temperature-controlled flow valve according to claim 1, characterized in that, When the temperature of the fluid is lower than the reference value, the shape memory alloy spring is disposed between the valve body and the valve core, and the reset spring is disposed between the valve core and the adjusting member.

4. The temperature-controlled flow valve according to claim 1, characterized in that, The orthographic projection of the conical contact portion in the direction of water flow is greater than the orthographic projection of the liquid flow channel.

5. The temperature-controlled flow valve according to claim 1, characterized in that, The taper of the tapered abutment portion ranges from 45° to 60°.

6. The temperature-controlled flow valve according to claim 1, characterized in that, The adjusting member includes a connecting side facing the tapered abutment portion, and the connecting side is provided with a guide portion that matches the shape of the tapered abutment portion.

7. The temperature-controlled flow valve according to claim 1, characterized in that, The valve core is provided with a single-sided opening channel that is connected to the liquid flow channel. The single-sided opening channel is open on the side facing the water inlet and closed on the side facing the water outlet.

8. The temperature-controlled flow valve according to claim 7, characterized in that, The liquid passage is provided on the valve stem, and the liquid passage is connected to the fluid channel through the single-sided opening channel.

9. The temperature-controlled flow valve according to claim 7, characterized in that, The diameter of the fluid flow channel is larger than the diameter of the single-sided opening channel.

10. The temperature-controlled flow valve according to claim 7, characterized in that, The valve body is provided with an extension wall extending into the fluid passage, the extension wall being configured to provide support for the spring assembly.

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