A single-use temperature sensing valve for a thermally sensitive memory spring

Abstract

The utility model discloses a kind of straw temperature control valve of one-way effect temperature sensing memory spring, belong to water cup straw temperature control valve technical field.It includes valve body and valve core, and the cavity with water inlet hole and water outlet passage are equipped in valve body;Valve core includes plugging member and one-way effect temperature sensing memory spring.When ambient temperature is not lower than preset temperature, spring is heated and elongated, drives plugging member to move up and close water outlet passage;When temperature is lower than preset temperature, spring stops elongation, plugging member falls under the action of gravity, opens passage.The utility model realizes the reliable temperature control function of high-temperature automatic locking, low-temperature automatic opening with low-cost one-way memory spring, effectively solve the problem of high cost caused by using double memory spring in prior art, simple structure, safe and practical, conducive to promotion.

Description

Technical Field

[0001] This utility model belongs to the technical field of temperature control valves for water cup straws, and particularly relates to a straw temperature control valve with a single-pass temperature-sensing memory spring. Background Technology

[0002] A common safety issue with straw cups is that when hot water is inside and the lid is sealed, the straw passage is closed. Shaking the cup at this time will generate a large amount of steam. When the cup is opened to drink water, the straw passage is opened, and the steam pressure will force the hot water out of the straw at high speed, which can cause scalding accidents.

[0003] To address the aforementioned issues, existing straw cups generally incorporate anti-splash structures, primarily in two ways: First, a venting and pressure-relief structure is used, requiring the pressure to be released before opening the lid, or a constant pressure valve is installed that automatically releases pressure when the pressure inside the cup becomes too high. Second, a temperature control valve is used, which remains closed when the temperature exceeds a set level (e.g., 50 degrees Celsius), preventing users from drinking directly from the straw. The straw can only be opened when the water temperature is below the set level, thus preventing scalding accidents. For example, patent application number 201710250413.9, entitled "Anti-splash Straw Valve and Straw and Water Cup Equipped with It," describes a temperature-controlled clamp that deforms the straw body to cut off or open the flow. This clamp is a spring made of shape memory alloy, holding the straw body with clamping arms. It tightens the clamp at high temperatures and loosens it at lower temperatures. This type of temperature-controlled clamp uses a double-stroke shape memory spring, making it very expensive and hindering its widespread adoption. Summary of the Invention

[0004] To address the high cost issue of the existing technology, the purpose of this invention is to provide a single-pass temperature-sensing memory spring-loaded straw temperature control valve with a reasonable structure, low cost, and suitability for widespread application.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A straw temperature control valve with a single-acting temperature-sensing memory spring includes a valve body and a valve core. The valve body has a hollow cavity with several water inlet holes on its side wall. The upper end of the cavity is a connecting part that connects to the straw, and the connecting part has a water outlet channel. The valve core is located in the cavity and is used to open or close the water outlet channel. It includes at least a sealing element and a single-acting temperature-sensing memory spring. The sealing element moves vertically within the cavity. The single-acting temperature-sensing memory spring is placed between the sealing element and the bottom wall of the cavity. When the ambient temperature is not lower than a preset temperature, the single-acting temperature-sensing memory spring is heated and elongates, driving the sealing element to move upward and close the water outlet channel, thus being in a closed state. When the ambient temperature is lower than the preset temperature, the single-acting temperature-sensing memory spring stops elongating and retracts under the gravity of the sealing element, thus opening the water outlet channel.

[0007] Preferably, the valve body includes a housing and a bottom cover; the housing is vertically continuous and consists of a connecting part and a body from top to bottom, with the inner diameter of the connecting part being smaller than the inner diameter of the body; the water inlet is located on the side wall of the body; the bottom cover is detachably connected to the lower opening of the body, and the body and the bottom cover together form a cavity; a single-pass temperature-sensing memory spring is placed between the sealing element and the bottom cover.

[0008] Preferably, the bottom cover extends into the cavity and is provided with a guide post coaxial with the water outlet channel; the guide post has an axially arranged guide hole; the sealing component is umbrella-shaped and includes a plug and a guide rod from top to bottom, the outer diameter of the guide rod is adapted to the inner diameter of the guide hole, and the guide rod moves up and down in the guide hole; a one-way effective temperature-sensing memory spring is sleeved on the outside of the guide post, and its two ends abut against the plug and the bottom cover respectively.

[0009] Preferably, the guide hole is through the top and bottom, and the lower end of the guide rod is detachably connected to a T-shaped limiting component. The plug and the limiting component limit the valve core 2 vertically within the guide hole.

[0010] Preferably, the guide rod and the limiting component are made of food-grade metal; the guide rod and the limiting component are connected by threads; and the sealing component is made of food-grade elastic sealing material and is located at the top of the guide rod.

[0011] As a preferred embodiment, a return spring is also provided between the limiting component and the bottom cover; when the ambient temperature is not lower than the preset temperature, the elastic force of the one-way effective temperature-sensing memory spring is greater than that of the return spring; when the ambient temperature is lower than the preset temperature, the combined force of the return spring and the valve core gravity is greater than that of the one-way effective temperature-sensing memory spring.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. Replacing expensive double-stroke memory springs with low-cost single-stroke temperature-sensing springs significantly reduces product costs and facilitates market promotion; 2. The structure is reasonably designed, using the spring's thermal expansion to drive the valve core to close, and relying on the valve core's own gravity to achieve reset and reopening, ensuring reliable operation; the use of a reset spring to assist in reset and reopening further improves the functionality and reliability. 3. The valve core guiding structure is stable and is prevented from falling off by limiting components, thus improving product lifespan and safety; 4. Key components are made of food-grade materials, ensuring safe and hygienic use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional exploded structural diagram of the present invention.

[0014] Figure 2 This is a cross-sectional view of the present invention when it is in the open state.

[0015] Figure 3 This is a cross-sectional view of the present invention when it is in the closed state. Detailed Implementation

[0016] To make the technical solution of this utility model clearer, the following description is in conjunction with the appendix. Figures 1 to 3 This specification provides a detailed description of the present invention. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the scope of protection of the present invention.

[0017] This utility model is a single-pass temperature-sensing memory spring suction pipe temperature control valve, including valve body 1 and valve core 2, wherein the valve core 2 is movable in the cavity 10 of valve body 1 and is used to open and close the water outlet channel at the upper end of valve body 1.

[0018] Specifically, the valve core 2 includes at least a sealing element 21 and a one-way temperature-sensing memory spring 22; the sealing element 21 moves vertically within the cavity 10; the one-way temperature-sensing memory spring 22 is placed between the sealing element 21 and the bottom wall of the cavity 10. Specifically, the valve body 1 includes a housing 11 and a bottom cover 12; the housing 11 is vertically continuous and consists of a connecting part 111 and a body 112 from top to bottom, and the inner diameter of the connecting part 111 is smaller than the inner diameter of the body 112; the side wall of the body 112 is provided with several water inlet holes 113; the connecting part 111 is tubular and has a water outlet channel for connecting with a suction pipe; the bottom cover 12 is detachably connected to the lower opening of the body 112 (it can be connected by threads or snaps, etc.), and the body 112 and the bottom cover 12 together form a cavity 10; a single-pass temperature-sensing memory spring 22 is placed between the sealing part 21 and the bottom cover 12.

[0019] Specifically, the bottom cover 12 has a guide post 121 extending axially into the cavity 10 from the middle, and is coaxially arranged with the water outlet channel. The guide post 121 has an axially arranged guide hole 122. The sealing member 21 is umbrella-shaped and includes a plug 211 and a guide rod 212 from top to bottom. The outer diameter of the guide rod 212 is adapted to the inner diameter of the guide hole 122, and the guide rod 212 moves up and down in the guide hole 122. The one-way effective temperature-sensing memory spring 22 is sleeved on the outside of the guide post 121, and its two ends abut against the plug 211 and the bottom cover 12, respectively.

[0020] Specifically, the guide hole 122 is open from top to bottom, and the lower end of the guide rod 212 is detachably connected to a T-shaped limiting member 213. The limiting member 213 and the sealing member 21 limit the valve core 2 from top to bottom to prevent it from falling out of the guide hole 122.

[0021] Specifically, in order to increase the weight of the valve core 2 and facilitate the retraction of the single-acting temperature-sensing memory spring 22, the guide rod 212 and the limiting member 213 are made of food-grade metal materials, such as stainless steel, copper, and titanium, and are connected by threads; the sealing member 21 is made of food-grade elastic sealing material, such as silicone or TPE, and is located at the top of the guide rod 212 (it can be connected by rubber coating or detachable method).

[0022] Specifically, a reset spring (not shown in the attached diagram) can be provided between the limiting member 213 and the bottom cover 12, which is more conducive to the reset and retraction of the one-way temperature-sensing memory spring 22. However, in high-temperature environments, the one-way temperature-sensing memory spring 22 can overcome the elastic force of the reset spring to drive the sealing member 21 to move upward and close the water outlet channel. In low-temperature environments, the restoring force of the reset spring can assist the one-way temperature-sensing memory spring 22 to reset and retract and drive the sealing member 21 to move downward and open the water outlet channel, making the function more reliable.

[0023] The working principle of a single-stroke thermal memory spring: This type of spring is usually made of shape memory alloys, such as nitinol. It is based on the shape memory effect of the material and its unique solid-solid phase transformation characteristics. The driving force comes from the drastic changes in crystal structure and mechanical properties during the transformation between the austenitic and martensitic phases. At high temperatures (when the alloy is in the austenitic phase), it retains (memorizes) an original shape (in this example, the extended state) -> at low temperatures, it can be easily deformed (cooling causes a martensitic phase transformation, transforming into the martensitic phase, which is soft and highly deformable) -> upon heating, it strongly recovers its original shape (the material undergoes a reverse martensitic phase transformation, transforming back from the martensitic phase to the austenitic phase, and it spontaneously and strongly recovers to the original shape initially set at the high temperature) -> After cooling, it retains its original shape (unless external force is applied again to deform it; in this embodiment, the external force comes from the gravity of the valve core 2 and the restoring force of the return spring). The price of a dual-stage temperature-sensing memory spring is 5-10 times or even more than that of a single-stage temperature-sensing memory spring. The purchase price of each dual-stage temperature-sensing memory spring is 20-30 yuan, while the purchase price of a single-stage temperature-sensing memory spring is only 2-3 yuan, which is nearly 10 times the price difference, and the cost difference is very large.

[0024] When in use, if the ambient temperature (water temperature) is not lower than the preset temperature (e.g., 50 degrees), the one-way effect temperature-sensing memory spring (22) will extend due to heat, driving the sealing component (21) to move upward to close the water outlet channel. The reset spring will be compressed and in the closed state. If the ambient temperature (water temperature) is lower than the preset temperature (e.g., 50 degrees), the one-way effect temperature-sensing memory spring (22) will stop extending (i.e., there is no or only a weak force tending to extend). At this time, under the combined action of the gravity of the sealing component (21) and the restoring force of the reset spring, it will reset and retract, opening the water outlet channel and being in the open state.

[0025] The above description is merely a specific example of this utility model and does not constitute any limitation on this utility model. Obviously, those skilled in the art, after understanding the content and principle of this utility model, may make various modifications and changes in form and details without departing from the principle and structure of this utility model. However, these modifications and changes based on the concept of this utility model are still within the protection scope of the claims of this utility model.

Claims

1. A single-stroke temperature-sensing memory spring-loaded straw temperature control valve, comprising a valve body (1) and a valve core (2), characterized in that: The valve body (1) has a hollow cavity (10) inside. The side wall of the cavity (10) is provided with several water inlet holes (113). The upper end of the cavity (10) is a connecting part (111) connected to the suction pipe, and the connecting part (111) is provided with a water outlet channel. The valve core (2) is located in the cavity (10) for opening or closing the water outlet channel, and includes at least a sealing element (21) and a one-way effective temperature-sensing memory spring (22). The sealing element (21) moves vertically within the cavity (10); A single-pass temperature-sensing memory spring (22) is placed between the sealing element (21) and the bottom wall of the cavity (10); When the ambient temperature is not lower than the preset temperature, the one-way effective temperature-sensing memory spring (22) is heated and elongates, driving the sealing component (21) to move upward and close the water outlet channel, and is in the closed state; when the ambient temperature is lower than the preset temperature, the one-way effective temperature-sensing memory spring (22) stops elongating, and is reset and retracted under the gravity of the sealing component (21), and the water outlet channel is opened and is in the open state.

2. The straw temperature control valve with a single-stroke temperature-sensing memory spring according to claim 1, characterized in that: The valve body (1) includes a housing (11) and a bottom cover (12); The shell (11) is open from top to bottom, and from top to bottom it consists of a connecting part (111) and a body (112), and the inner diameter of the connecting part (111) is smaller than the inner diameter of the body (112); The water inlet (113) is located on the side wall of the body (112); The bottom cover (12) is detachably connected to the lower opening of the body (112), and the body (112) and the bottom cover (12) together form a cavity (10). A single-pass temperature-sensing memory spring (22) is placed between the sealing element (21) and the bottom cover (12).

3. The straw temperature control valve with a single-stroke temperature-sensing memory spring according to claim 2, characterized in that: The bottom cover (12) extends into the cavity (10) and is provided with a guide post (121) coaxial with the water outlet channel. The guide post (121) has an axially arranged guide hole (122); The sealing component (21) is umbrella-shaped and includes a plug (211) and a guide rod (212) from top to bottom. The outer diameter of the guide rod (212) is matched with the inner diameter of the guide hole (122), and the guide rod (212) moves up and down in the guide hole (122). A single-pass temperature-sensing memory spring (22) is sleeved on the outside of the guide post (121), and its two ends abut against the plug (211) and the bottom cover (12) respectively.

4. The straw temperature control valve with a single-stroke temperature-sensing memory spring according to claim 3, characterized in that: The guide hole (122) is open from top to bottom, and the lower end of the guide rod (212) is detachably connected to a T-shaped limiting member (213). The plug (211) and the limiting member (213) limit the valve core 2 to the top and bottom within the guide hole (122).

5. The straw temperature control valve with a single-stroke temperature-sensing memory spring according to claim 4, characterized in that: The guide rod (212) and the limiting member (213) are made of food-contact metal. The guide rod (212) and the limiting member (213) are connected by threads; The sealing element (21) is made of food-contact elastic sealing material and is located at the top of the guide rod (212).

6. The straw temperature control valve with a single-stroke temperature-sensing memory spring according to claim 4, characterized in that: A reset spring is also provided between the limiting member (213) and the bottom cover (12); When the ambient temperature is not lower than the preset temperature, the elastic force of the single-pass temperature-sensing memory spring (22) is greater than that of the return spring. When the ambient temperature is lower than the preset temperature, the combined force of the reset spring force and the gravity of the valve core (2) is greater than the force of the single-pass temperature-sensing memory spring (22).

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