Temperature control safety valve

Abstract

The utility model discloses a temperature control safety valve, which belongs to the technical field of valves, and comprises a valve body, a valve core, a valve core and a valve core, 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 blocking protrusion is arranged at the end, away from the base, of the valve rod; the adjusting part is arranged in the fluid channel and is close to the valve rod, and the adjusting part is provided with a drainage channel matched with the blocking protrusion; the memory alloy spring is arranged outside the valve rod in a sleeving mode, one end of the memory alloy spring abuts against the base, and the other end of the memory alloy spring abuts against the adjusting piece; the memory alloy spring is configured to sense the temperature of fluid flowing out of the liquid passing hole and can drive the valve element to move in the direction away from the adjusting piece. Compared with the prior art, the temperature control safety valve is good in sealing performance, high in sensitivity and accurate in temperature control.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, especially relate to a temperature control safety valve. BACKGROUND

[0002] In industrial and civil fields, temperature control safety valves, as a kind of key safety protection device, are widely applied to various equipment and systems. Its main function is to automatically discharge when system temperature is too high to prevent safety accidents caused by temperature too high of equipment or system.

[0003] However, the existing temperature control safety valve still has some problems and deficiencies in practical application. For example, the sealing performance of part of temperature control safety valve is difficult to guarantee, and leakage phenomenon is prone to occur, which not only reduces the operation efficiency of equipment, but also can lead to safety hazards. In addition, the sensitivity of some temperature control safety valves is not high enough, and cannot respond to temperature changes in time, leading to not being able to discharge rapidly when temperature is too high, and not being able to effectively protect equipment and system. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model provides a temperature control safety valve with simple structure, sensitive adjustment and accurate temperature control.

[0005] The technical scheme of the utility model is:

[0006] The utility model provides a temperature control safety valve, which comprises:

[0007] A valve body has a fluid passage;

[0008] A valve core is arranged in the fluid passage and comprises a base and a valve rod, the valve core is provided with a liquid passage hole communicating with the fluid passage, and the valve rod is provided with a plugging protrusion at an end away from the base;

[0009] An adjusting part is arranged in the fluid passage and is arranged close to the valve rod, and the adjusting part is provided with a discharge channel matched with the plugging protrusion;

[0010] A memory alloy spring is sleeved outside the valve rod, one end of the memory alloy spring abuts against the base, and the other end of the memory alloy spring abuts against the adjusting part; the memory alloy spring is configured to sense the temperature of fluid flowing out of the liquid passage hole and can drive the valve core to move away from the adjusting part.

[0011] Further, a reset spring is arranged in the fluid passage, located on a side of the base away from the memory alloy spring, and has a tendency to drive the valve core to move close to the adjusting part.

[0012] Further, the valve body is provided with an extension wall extending to the fluid channel, one end of the reset spring abuts against the extension wall, and the other end abuts against the base.

[0013] Further, a first sealing ring is sleeved on the blocking protrusion.

[0014] Further, the valve core is provided with a one-sided opening channel, which is communicated with the fluid channel on the side away from the adjusting member.

[0015] Further, the liquid passing hole is arranged on the valve rod, and the liquid passing hole is communicated with the fluid channel through the one-sided opening channel.

[0016] Further, the aperture of the leakage channel is smaller than the aperture of the one-sided opening channel.

[0017] Further, from the direction of the valve rod to the adjusting member, the cross-sectional area of the blocking protrusion first decreases and then increases.

[0018] Further, a second sealing ring is arranged between the adjusting member and the valve body.

[0019] Further, the valve body is provided with an internal thread, and the adjusting member is provided with an external thread matched with the internal thread.

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

[0021] The temperature control safety valve of the utility model, by setting the leakage channel on the adjusting member, and setting the blocking protrusion matched with the leakage channel on the valve rod, the blocking protrusion of the valve core is closely matched with the adjusting member, and the leakage channel is closed, the risk of fluid leakage is reduced, the operation efficiency and safety of the system are improved, and since the direction of the blocking protrusion and the leakage channel is consistent with the flow direction of the fluid, when the fluid enters the temperature control safety valve, the thrust of the fluid can make the blocking protrusion connected with the leakage channel more closely, and the sealing performance is improved more. By setting the liquid passing hole on the valve rod, and sleeving the memory alloy spring on the valve rod, through the memory alloy spring, the temperature change of the fluid is sensed, when the temperature is too high, the valve core can be automatically driven to move away from the adjusting member, so that the leakage channel is opened, and timely leakage is realized, the safety accidents caused by the high temperature of equipment or system are effectively prevented, and the safety of equipment and personnel is ensured. The temperature control safety valve of the utility model has the advantages of simple structure, good sealing performance, fast response speed, and reliability and stability in high temperature environment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structure explosion map of the temperature control safety valve of the preferred embodiment of the utility model;

[0023] Figure 2 yes Figure 1 Cross-sectional view of a medium-temperature controlled safety 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 safety valve 100, valve body 10, fluid passage 11, extension wall 12, through hole 13, valve core 20, base 21, valve stem 22, liquid passage hole 23, single-sided opening channel 24, blocking protrusion 25, first sealing ring 26, memory alloy spring 30, reset spring 40, adjusting component 50, venting channel 51, second sealing ring 52. 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 control safety valve 100, including a valve body 10, a valve core 20, an adjusting component 50, a memory alloy spring 30, and a return spring 40.

[0029] The valve body 10 serves as the supporting structure for the entire temperature-controlled safety valve 100, and its interior is provided with a fluid channel 11 that penetrates the valve body 10 and allows fluid to flow in. 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. The extension wall 12 provides support at one end of the return spring 40, ensuring that the return spring 40 works stably.

[0031] The valve body 10 is provided with an internal thread that matches the external thread on the adjusting member 50, which makes it easy to change the installation position of the adjusting member 50, thereby changing the temperature setting of the temperature control safety valve 100 and improving the applicability of the temperature control safety valve 100.

[0032] The valve core 20 is disposed within the fluid channel 11 and includes a base 21 and a valve stem 22. The base 21 slides against the cavity wall of the fluid channel 11, thereby providing a stable support point for the valve core 20 and preventing unnecessary displacement of the valve core 20 during movement.

[0033] The valve core 20 is provided with a liquid passage hole 23 that communicates with the fluid channel 11. By providing the liquid passage hole 23, the fluid in the fluid channel 11 can flow out through the liquid passage hole 23 and be sensed by the shape memory alloy spring 30. This allows the shape memory alloy spring 30 to sense changes in fluid temperature in a timely manner, thereby driving the valve core 20 to move within the fluid channel 11 according to the temperature change, improving the response speed of the temperature control safety valve 100 and increasing the discharge rate.

[0034] In this embodiment, the valve core 20 is provided with a one-sided opening channel 24. This one-sided opening channel 24 is open on one side of the base 21 and closed on one side of the valve stem 22. That is, the one-sided opening channel 24 is connected to the fluid channel 11 on the side away from the adjusting member 50. This arrangement ensures that the fluid can only flow through a specific path. Since the one-sided opening channel 24 is closed on the valve stem 22 side, when the fluid flows through, the impact force of the fluid impacts the valve stem 22, making the blocking protrusion 25 on the valve stem 22 connect more tightly with the venting channel 51 on the adjusting member 50, thereby effectively improving the sealing performance of the temperature control safety valve 100.

[0035] Furthermore, the liquid passage 23 is disposed on the valve stem 22, and the liquid passage 23 is connected to the fluid channel 11 via the one-sided opening channel 24. This arrangement ensures that after the fluid enters the one-sided opening channel 24 from the fluid channel 11, it can only flow to the shape memory alloy spring 30 through the liquid passage 23. The shape memory alloy spring 30 can more directly sense the temperature change of the fluid, thereby improving the accuracy and speed of temperature sensing. This ensures that the valve can respond to temperature changes in a timely manner, achieve rapid discharge, and protect system safety.

[0036] Furthermore, the single-sided opening channel 24 on the valve core 20 allows fluid to flow from the larger area fluid channel 11 to the smaller area single-sided opening channel 24, thereby causing a large amount of fluid to impact the base 21, thus improving the sealing performance between the valve core 20 and the regulating component 50.

[0037] In other embodiments, instead of providing a separate single-sided opening channel 24, the liquid passage 23 may be located on the base 21 near the cavity wall, so that fluid passes through the liquid passage 23 on the base 21 and comes into contact with the shape memory alloy spring 30. This invention does not limit this aspect.

[0038] Furthermore, the valve stem 22 has a blocking protrusion 25 on the side away from the base 21 to block the leakage channel 51 on the regulating member 50. The shape and size of the blocking protrusion 25 match the leakage channel 51 on the regulating member 50 to ensure a tight fit under normal operating conditions, closing the leakage channel 51 and preventing fluid leakage.

[0039] Furthermore, a first sealing ring 26 is fitted on the blocking protrusion 25, thereby increasing the sealing between the valve core 20 and the adjusting member 50 and improving the sealing performance of the temperature control safety valve 100.

[0040] Furthermore, from the valve stem 22 to the adjusting member 50, the cross-sectional area of ​​the blocking protrusion 25 first decreases and then increases. That is, the blocking protrusion 25 has a structure that is large at both ends and small in the middle. With this configuration, on the one hand, the larger ends can be tightly connected to the discharge channel 51, and on the other hand, the smaller middle part can cooperate with the first sealing ring 26 to seal the discharge channel 51, thereby significantly improving the sealing performance of the temperature control safety valve 100.

[0041] The regulating member 50 is used to set the temperature threshold of the temperature-controlled safety valve 100. It is disposed within the fluid channel 11 and near the valve stem 22. That is, the regulating member 50 is located at the end in the fluid flow direction. A venting channel 51 is provided on the regulating member 50 for venting. By providing the venting channel 51 on the regulating member 50, the space of the temperature-controlled safety valve 100 can be rationally arranged and effectively utilized. The venting channel 51 allows for timely venting when the temperature is too high.

[0042] Furthermore, the aperture of the discharge channel 51 is smaller than that of the single-sided opening channel 24. This arrangement allows fluid to flow from the larger area fluid channel 11 into the smaller area discharge channel 51 at a faster flow rate, thus enabling rapid fluid discharge, improving discharge efficiency, and enhancing the safety performance of the temperature-controlled safety valve 100. Additionally, considering the fluid dynamics, pressure multiplied by area, a smaller aperture in the discharge channel 51 results in a smaller effective sealing area. Consequently, the fluid pressure required to push the valve core 20 away from the regulating element 50 is also smaller. This allows the shape memory alloy spring 30 to quickly push the valve core 20 away from the regulating element 50, ensuring the discharge function while increasing the sensitivity of the valve core 20's movement, enabling the valve core 20 to respond more rapidly to temperature changes.

[0043] Preferably, the orifice diameter of the venting channel 51 is 1.5mm to 3mm. By rationally designing the orifice diameter of the venting channel 51, the sealing performance and venting timeliness of the temperature control safety valve 100 can be improved.

[0044] The shape memory alloy spring 30 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 30 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 30 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 safety valve 100 of this invention can react quickly and accurately to temperature changes, improving the safety of the temperature-controlled safety valve 100.

[0045] A shape memory alloy spring 30 is sleeved around the valve stem 22, enabling it to quickly sense the temperature of the fluid flowing out of the liquid passage 23 on the valve stem 22, thus achieving a rapid response to temperature and pressure. One end of the shape memory alloy spring 30 abuts against the base 21, and the other end abuts against the adjusting member 50. The shape memory alloy spring 30 is configured to sense the temperature of the fluid flowing out of the liquid passage 23 and can drive the valve core 20 to move away from the adjusting member 50. This configuration allows the shape memory alloy spring 30 to quickly drive the valve core 20 away from the adjusting member 50 when its elasticity changes at high temperatures, thereby quickly opening the discharge channel 51.

[0046] Because memory springs can have a fatigue life of up to millions or even tens of millions of cycles and are resistant to general acid and alkali corrosion, they are suitable for long-life and corrosive working environments. Therefore, they can significantly improve the service life of the temperature control safety valve 100 and reduce maintenance costs.

[0047] Furthermore, the temperature-controlled safety valve 100 also includes a return spring 40. The return spring 40 is disposed within the fluid channel 11, located on the side of the base 21 opposite to the shape memory alloy spring 30, and has a tendency to drive the valve core 20 towards the adjusting member 50. By providing the return spring 40, the temperature-controlled safety valve 100 is kept in a normally closed sealed state under normal conditions. Furthermore, the return spring 40 also gives the blocking protrusion 25 of the valve core 20 a tendency to move towards the discharge channel 51, thereby improving the sealing performance of the temperature-controlled safety valve 100.

[0048] One end of the return spring 40 abuts against the extension wall 12, and the other end abuts against the base 21. That is, the return spring 40 and the shape memory alloy spring 30 are respectively disposed on both sides of the base 21, and work together to achieve precise control of temperature and pressure.

[0049] Furthermore, the valve body 10 is provided with an internal thread, and the adjusting member 50 is provided with an external thread that matches the internal thread. The internal and external threads allow the adjusting member 50 to move relative to the valve body 10. By adjusting the position of the adjusting member 50 within the valve body 10, the compression of the return spring 40 is changed, thereby adjusting the elastic force of the return spring 40 and setting the opening temperature of the temperature-controlled safety valve 100.

[0050] Since the temperature control safety valve 100 remains closed under normal conditions, the elasticity (i.e., compression distance) of the shape memory alloy spring 30 is fixed. By fine-tuning the position of the adjusting element 50, only the compression stroke and elasticity of the return spring 40 will be affected. Therefore, changes in temperature or pressure can be addressed by adjusting the adjusting element 50.

[0051] Furthermore, a second sealing ring 52 is provided between the adjusting member 50 and the valve body 10 to improve the sealing performance of the temperature control safety valve 100.

[0052] Furthermore, when dealing with different requirements for diameter, water pressure, discharge flow rate, and temperature, this utility model can achieve the goal of matching the comprehensive requirements of the temperature control safety valve 100 for diameter, water pressure, discharge flow rate, and temperature in different application scenarios by simply replacing the shape memory alloy spring 30, the return spring 40, and the adjusting component 50, without changing the basic structure. The structure is simple, the cost is low, and the applicability is strong.

[0053] In summary, the temperature-controlled safety valve 100 of this utility model, by providing a discharge channel 51 on the adjusting component 50 and a blocking protrusion 25 on the valve stem 22 that matches the discharge channel 51, allows the blocking protrusion 25 of the valve core 20 to fit tightly with the adjusting component 50, closing the discharge channel 51, reducing the risk of fluid leakage, and improving the system's operating efficiency and safety. Furthermore, since the directions of the blocking protrusion 25 and the discharge channel 51 are consistent with the fluid flow direction, when fluid enters the temperature-controlled safety valve 100, the thrust of the fluid allows the blocking protrusion 25 to connect more tightly with the discharge channel 51, further improving the sealing performance. By providing a liquid passage hole 23 on the valve stem 22 and sleeved with a shape memory alloy spring 30 on the valve stem 22, the shape memory alloy spring 30 senses changes in fluid temperature. When the temperature is too high, it can automatically drive the valve core 20 to move away from the adjusting component 50, opening the discharge channel 51 for timely discharge, effectively preventing safety accidents caused by excessive temperature in equipment or systems, and ensuring the safety of equipment and personnel. The temperature-controlled safety valve 100 of this invention has a simple structure, good sealing performance, fast response speed, and high reliability and stability under high-temperature environments. At normal temperatures, the blocking protrusion 25 extends into the discharge channel 51 and cooperates with the first sealing ring 26, thereby improving the sealing performance of the temperature-controlled safety valve 100. When the temperature is high, the shape memory alloy spring 30 can quickly influence temperature changes, and due to the small orifice of the discharge channel 51, it can quickly drive the valve core 20 to move away from the regulating element 50, thereby achieving rapid discharge and improving the safety of the temperature-controlled safety valve 100.

[0054] 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 safety valve, characterized in that, include: The valve body has a fluid passage; A valve core, disposed within the fluid channel, includes a base and a valve stem. The valve core has a liquid passage hole communicating with the fluid channel, and the valve stem has a blocking protrusion at the end away from the base. An adjusting element is disposed within the fluid channel and near the valve stem, and the adjusting element is provided with a venting channel that matches the blockage protrusion; A shape memory alloy spring is sleeved on the valve stem, with one end abutting against the base and the other end abutting against the adjusting member; the shape memory alloy spring is configured to sense the temperature of the fluid flowing out of the liquid passage and can drive the valve core to move away from the adjusting member.

2. The temperature-controlled safety valve according to claim 1, characterized in that, It also includes a return spring, which is disposed within the fluid channel, located on the side of the base away from the shape memory alloy spring, and has a tendency to drive the valve core to move closer to the regulating member.

3. The temperature-controlled safety valve according to claim 2, characterized in that, The valve body is provided with an extension wall extending into the fluid channel, one end of the return spring abuts against the extension wall, and the other end abuts against the base.

4. The temperature-controlled safety valve according to claim 1, characterized in that, A first sealing ring is fitted onto the blocking protrusion.

5. The temperature-controlled safety valve according to claim 1, characterized in that, The valve core is provided with a single-sided opening channel, which is connected to the fluid channel on the side opposite to the regulating member.

6. The temperature-controlled safety valve according to claim 5, 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.

7. The temperature-controlled safety valve according to claim 5, characterized in that, The diameter of the discharge channel is smaller than the diameter of the single-sided opening channel.

8. The temperature-controlled safety valve according to claim 7, characterized in that, From the valve stem to the adjusting member, the cross-sectional area of ​​the blocking protrusion first decreases and then increases.

9. The temperature-controlled safety valve according to claim 1, characterized in that, A second sealing ring is provided between the adjusting component and the valve body.

10. The temperature-controlled safety valve according to claim 1, characterized in that, The valve body is provided with an internal thread, and the adjusting component is provided with an external thread that matches the internal thread.

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