A temperature-controlled blowout-prevention valve for a straw cup

Abstract

The utility model discloses a temperature control blowout prevention valve for straw cup, including the hollow inside cavity that is equipped with in casing, and upper and lower through -going water inlet and water outlet are equipped with, the tubular structure of flexible material is made for pipe body, and it is located in the inner chamber of casing and is connected with water inlet and water outlet, the valve core is located in the inner chamber of casing for drive pipe body deformation to cut off or conduct pipe body, the valve core includes the second spring and extruding block of setting in the one side of pipe body, the second spring is one -way temperature sensing memory spring, and its one end is in contact with casing, and the other end is connected with extruding block, when water temperature is higher than setting temperature, the second spring unfolds and elongates and pushes extruding block to extrude to pipe body to make pipe body deformation cut off water flow, when water temperature is lower than setting temperature, the second spring stops to pipe body and exerts force, and pipe body elasticity natural reset recovers the on -state, and push extruding block and move outward reset, and second spring restores to be in compression state simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of water cup technology, and in particular relates to a temperature-controlled anti-spray valve for straw cups. 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] The purpose of this invention is to provide a temperature-controlled anti-spray valve for straw cups, which uses a single-stroke memory spring, resulting in lower cost and making it suitable for widespread application.

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

[0006] A temperature-controlled anti-spray valve for a straw cup includes a hollow housing with an inner cavity and an inlet and outlet running vertically through it; a flexible tubular structure is located within the inner cavity of the housing and connected to the inlet and outlet; a valve core is located within the inner cavity of the housing to deform the tubular structure to either stop or allow water flow; the valve core includes a second spring and a compression block located on one side of the tubular structure; the second spring is a one-way temperature-sensing memory spring, with one end contacting the housing and the other end connected to the compression block; when the water temperature is higher than the set temperature, the second spring extends and pushes the compression block against the tubular structure to deform it and stop water flow; when the water temperature is lower than the set temperature, the second spring stops applying force to the tubular structure, the tubular structure elastically returns to its original position and resumes its conductive state, and pushes the compression block outward to reset, while the second spring returns to its compressed state.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: By adopting the above technical solution, the second spring is set as a single-pass temperature-sensing memory spring on one side of the pipe body, and a compression block is connected to the second spring. When the water temperature is high, the second spring can unfold and extend to push the compression block to compress the pipe body to stop the water flow; when the water temperature drops, the second spring stops applying force to the pipe body, and because the pipe body itself has a flexible restoring force, it can push the compression block to move outward and reset, and the second spring will return to its original compression. At the same time, the pipe body itself naturally returns to the conductive state. Under this structure, the use of a single-pass memory spring results in lower cost and is suitable for widespread application.

[0008] Preferably, the valve core also includes a first spring and a reset push rod; the first spring is located on the opposite side of the pipe body from the second spring; the first spring is a reset spring, with one end abutting against the housing and the other end connected to the reset push rod; the reset push rod has a clearance hole in the middle to avoid the pipe body; the squeezing block is in contact with the reset push rod; when the water temperature is higher than the set temperature, the second spring unfolds and extends to push the squeezing block against the pipe body to deform the pipe body and stop the water flow, while the first spring is compressed and stores energy; when the water temperature is lower than the set temperature, under the elastic restoring force of the first spring, the reset push rod pushes the squeezing block away from the pipe body to restore the pipe body to its natural conduction state, while the second spring returns to its compressed state.

[0009] By adopting the above technical solution, the first spring is set as a reset spring and is positioned opposite the second spring on the other side of the pipe body and connected to the reset push rod. In this structure, after the water temperature drops, the first spring can push the squeezing block away from the pipe body through the reset push rod under the action of restoring force so as to restore its natural conductivity and recompress the second spring. The first spring can further ensure the reset of the squeezing block and the second spring. Moreover, by setting an avoidance hole in the middle of the reset push rod, the squeezing of the pipe body is avoided during the back-and-forth movement of the reset push rod.

[0010] Preferably, the extrusion block has a wedge-shaped extrusion head at one end corresponding to the tube body.

[0011] By adopting the above technical solution, it is easier to cut off the flow and seal the pipe body by setting a wedge-shaped extrusion head.

[0012] Preferably, the end of the extrusion block corresponding to the second spring is provided with a connecting post; there is an abutment plate between the connecting post and the extrusion head; the reset push rod abuts against the abutment plate.

[0013] By adopting the above technical solution, the connecting column is set to facilitate connection with the second spring; the abutment plate is set to facilitate contact with the reset push rod, so that the reset push rod can push the squeezing block during reset.

[0014] Preferably, the housing includes a first housing and a second housing that are detachably connected; the first housing has a first receiving cavity for accommodating the first spring; the opening of the first receiving cavity has a stop block that abuts against the tube body, and the stop block is also placed in a clearance hole; the second housing has a second receiving cavity for accommodating the second spring.

[0015] By adopting the above technical solution, the shell is set to be detachable for easy disassembly and assembly; the first and second receiving cavities are set to facilitate the placement of the first and second springs; a stop is set so that when the extrusion block extrudes the tube, the stop on the other side of the extrusion block can block the tube from retracting, ensuring that the tube is squeezed and the flow is interrupted.

[0016] Preferably, the first housing is provided with several hooks on the top and bottom; the second housing is provided with corresponding fastening holes; the hooks and fastening holes are fastened together.

[0017] By adopting the above technical solution, the combination of hooks and snap holes facilitates detachable connection.

[0018] Preferably, the opening of the first receiving cavity is provided with a locking part; the stop block is provided with a corresponding locking part; the locking part is limited within the locking part.

[0019] By adopting the above technical solution, the combination of the box locking part and the locking part makes it easy to limit the setting of the stop block.

[0020] Preferably, the second housing is provided with several water-permeable holes.

[0021] By adopting the above technical solution, water permeable holes are provided to facilitate water flow into the second receiving cavity and direct contact with the second spring, so that it can sense the water temperature.

[0022] Preferably, the lower end of the second housing is provided with a lower connecting pipe that is inserted into the lower end of the pipe body to form a water inlet; the upper end of the second housing is provided with an upper connecting pipe that is inserted into the upper end of the pipe body to form a water outlet.

[0023] By adopting the above technical solution, the upper and lower connecting pipes facilitate connection and fixation with the pipe body.

[0024] Preferably, the upper end of the upper connecting tube extends out of the housing.

[0025] By adopting the above technical solution, the upper end of the upper connecting tube extends out of the shell, making it easy to connect with the straw. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0027] Figure 2 This is a three-dimensional exploded structural diagram of the present invention.

[0028] Figure 3This is a cross-sectional view of the pipe when it is in a conductive state.

[0029] Figure 4 This is a cross-sectional structural diagram of the pipe body when the water flow is stopped.

[0030] Figure 5 yes Figure 3 A schematic diagram of the cross-sectional structure along line A.

[0031] Figure 6 This is a three-dimensional structural diagram of the first shell. Detailed Implementation

[0032] To make the technical solution of this utility model clearer, the following description is in conjunction with the appendix. Figures 1 to 6 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.

[0033] This utility model is a temperature-controlled anti-spray valve for straw cups, including a shell 1, a tube 2 and a valve core. The shell 1 is hollow and has an inlet and an outlet running vertically through it. The tube 2 is made of flexible material and has a tubular structure. It is located in the inner cavity of the shell 1 and is connected to the inlet and outlet. The valve core is located in the inner cavity of the shell 1 and is used to drive the tube 2 to deform in order to stop or open the tube 2.

[0034] In one embodiment, the valve core includes a first spring 3 and a second spring 4 disposed on both sides of the tube body 2. The first spring 3 is a return spring, with one end abutting against the housing 1 and the other end connected to a return push rod 5. The second spring 4 is a single-pass temperature-sensing memory spring, which can extend and recover in an environment higher than the set temperature (such as 50° or 55°). One end abuts against the housing 1 and the other end is connected to a squeezing block 6. The squeezing block 6 is in contact with and connected to the return push rod 5. When the water temperature in the cup is higher than the set temperature, the second spring 4 extends and pushes the squeezing block 6 to squeeze the tube body 2 to deform the tube body 2 and stop the water flow. At this time, the first spring 3 is compressed and stores energy. When the water temperature drops to the set temperature, under the elastic restoring force of the first spring 3, the return push rod 5 pushes the squeezing block 6 away from the tube body 2 to restore the tube body 2 to its natural conductive state. At this time, the second spring 4 is also restored to the compressed state.

[0035] In one embodiment, since the pipe body 2 itself is made of a flexible material with elastic restoring force, the valve core only needs to be provided with a second spring 4 and a compression block 6 on one side of the pipe body 2, and the pipe body 2 is clamped between the housing 1 and the compression block 6; the second spring 4 is a one-way temperature-sensing memory spring, one end of which abuts against the housing 1, and the other end is connected to the compression block 6; when the water temperature is higher than the set temperature, the second spring 4 unfolds and extends to push the compression block 6 to compress the pipe body 2 so that the pipe body 2 deforms and stops the water flow; when the water temperature is lower than the set temperature, the second spring 4 stops applying force to the pipe body 2, and the pipe body 2 naturally resets under the elastic restoring force to restore the conduction state, and pushes the compression block 6 to move outward to reset, while the second spring 4 returns to the compressed state.

[0036] The working principle of a single-stroke temperature-sensing memory spring: This spring is typically made of shape memory alloys, such as nitinol. It is based on the material's shape memory effect 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, spontaneously and strongly restoring 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 first spring 3). The price of a dual-pass temperature-sensing memory spring is 5-10 times or even more than that of a single-pass temperature-sensing memory spring. For example, the second spring 4 used in this embodiment would cost 20-30 yuan per spring if a dual-pass temperature-sensing memory spring were used, while a single-pass temperature-sensing memory spring would only cost 2-3 yuan, a price difference of nearly 10 times, resulting in a very large cost difference.

[0037] In one embodiment, the extrusion block 6 is provided with a wedge-shaped extrusion head 61 at one end corresponding to the tube body 2, and a connecting post for connecting the second spring 4 at the other end. There is an abutment plate 62 between the extrusion head 61 and the connecting post, and the reset push rod 5 abuts against the abutment plate 62.

[0038] In one embodiment, the reset push rod 5 is provided with a clearance hole 51 for the tube body 2 to pass through and avoid, so that the reset push rod 5 will not squeeze the tube body 2 during movement. One end of the reset push rod 5 is provided with a connecting post for connecting the first spring 3, and the other end is in contact with the abutment plate 62.

[0039] In one embodiment, the housing 1 includes a first housing 11 and a second housing 12 that are detachably connected. In this embodiment, a snap-fit ​​connection is adopted. Specifically, the first housing 11 is provided with a plurality of hooks 111 on the top and bottom, and the second housing 12 is provided with corresponding snap-fit ​​holes 121. The hooks 111 and the snap-fit ​​holes 121 are snapped together.

[0040] In one embodiment, the first housing 11 is provided with a first receiving cavity 112 for accommodating the first spring 3; the second housing 12 is provided with a second receiving cavity 122 for accommodating the second spring 4; and the opening of the first receiving cavity 112 is provided with a snap-fit ​​portion 113, and a stop block 7 is snapped on the snap-fit ​​portion 113 for blocking the tube body 2, and the stop block 7 is provided in the clearance hole 51 of the reset push rod 5; specifically, the stop block 7 is provided with a locking portion 71 corresponding to the snap-fit ​​portion 113; the locking portion 71 is limited within the snap-fit ​​portion 113.

[0041] In one embodiment, the second housing 12 is provided with a plurality of water-permeable holes 125, so that water can enter the second receiving cavity 122 and come into contact with the second spring 4, so that the second spring 4 can directly contact the water source to sense the water temperature.

[0042] In one embodiment, the lower end of the second housing 12 is provided with a lower connecting pipe 123 which is inserted into the lower end of the pipe body 2 to form a water inlet; the upper end of the second housing 12 is provided with an upper connecting pipe 124 which is inserted into the upper end of the pipe body 2 to form a water outlet; and the upper end of the upper connecting pipe 124 extends out of the housing 1 and can be used to connect a straw.

Claims

1. A temperature-controlled anti-spray valve for a straw cup, comprising: The shell (1) is hollow inside and has an inner cavity, and has an inlet and an outlet through the top and bottom; The tube body (2) is a tubular structure made of flexible material, which is located in the inner cavity of the shell (1) and connected to the inlet and outlet. The valve core, located in the inner cavity of the housing (1), is used to drive the pipe body (2) to deform in order to cut off or open the pipe body (2). Its features are: The valve core includes a second spring (4) and a compression block (6) disposed on one side of the tube body (2); The second spring (4) is a single-pass temperature-sensing memory spring. One end of it is in contact with the shell (1), and the other end is connected to a compression block (6). When the water temperature is higher than the set temperature, the second spring (4) unfolds and extends to push the squeezing block (6) to squeeze the pipe body (2) so that the pipe body (2) deforms and stops the water flow; When the water temperature is lower than the set temperature, the second spring (4) stops applying force to the pipe (2), the pipe (2) elastically resets and returns to the conductive state, and pushes the squeezing block (6) to move outward and reset. At the same time, the second spring (4) returns to the compressed state.

2. The temperature-controlled anti-spray valve for a straw cup according to claim 1, characterized in that: The valve core also includes a first spring (3) and a reset push rod (5); The first spring (3) is located on the opposite side of the tube body (2) and the second spring (4); The first spring (3) is a return spring, one end of which abuts against the housing (1), and the other end is connected to a return push rod (5). The reset push rod (5) has a clearance hole (51) in the middle to avoid the tube body (2); The compression block (6) is in contact with the reset push rod (5); When the water temperature is higher than the set temperature, the second spring (4) unfolds and extends to push the squeezing block (6) to squeeze the pipe body (2) so that the pipe body (2) deforms and stops the water flow. At the same time, the first spring (3) is compressed and stores energy. When the water temperature is lower than the set temperature, under the elastic restoring force of the first spring (3), the reset push rod (5) pushes the squeezing block (6) away from the pipe body (2) so that the pipe body (2) returns to the state of natural conduction, and at the same time the second spring (4) returns to the state of compression.

3. A temperature-controlled anti-spray valve for a straw cup according to claim 2, characterized in that: The extrusion block (6) is provided with a wedge-shaped extrusion head (61) at one end corresponding to the tube body (2).

4. A temperature-controlled anti-spray valve for a straw cup according to claim 3, characterized in that: The end of the extrusion block (6) corresponding to the second spring (4) is provided with a connecting post; A contact plate (62) is placed between the connecting column and the extrusion head (61). The reset push rod (5) comes into contact with the abutment plate (62).

5. A temperature-controlled anti-spray valve for a straw cup according to claim 2, characterized in that: The housing (1) includes a first housing (11) and a second housing (12) that are detachably connected; The first housing (11) is provided with a first receiving cavity (112) for receiving the first spring (3); The opening of the first receiving cavity (112) is provided with a stop (7) that blocks the tube body (2), and the stop (7) is also placed in the clearance hole (51); The second housing (12) is provided with a second receiving cavity (122) for accommodating the second spring (4).

6. A temperature-controlled anti-spray valve for a straw cup according to claim 5, characterized in that: The first housing (11) is provided with several hooks (111) on the top and bottom. The second housing (12) is provided with a corresponding fastening hole (121); The hook (111) and the fastening hole (121) are fastened together.

7. A temperature-controlled anti-spray valve for a straw cup according to claim 5, characterized in that: The opening of the first receiving cavity (112) is provided with a snap-fit ​​part (113). The stop block (7) is provided with a corresponding locking part (71); The locking part (71) is limited within the locking part (113).

8. A temperature-controlled anti-spray valve for a straw cup according to claim 5, characterized in that: The second shell (12) is provided with several water-permeable holes (125).

9. A temperature-controlled anti-spray valve for a straw cup according to claim 5, characterized in that: The lower end of the second housing (12) is provided with a lower connecting pipe (123) which is inserted into the lower end of the pipe body (2) to form a water inlet; The upper end of the second housing (12) is provided with an upper connecting pipe (124) which is inserted into the upper end of the pipe body (2) to form a water outlet.

10. A temperature-controlled anti-spray valve for a straw cup according to claim 9, characterized in that: The upper end of the upper connecting pipe (124) extends out of the housing (1).

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