A pot cover capable of preventing steam from flowing back

Abstract

The utility model discloses a kind of steam water backflow prevention's pot cover, pot cover body, pot cover body includes upper cover body and lower cover body, lower cover body and upper cover body between fixed installation have installation cylinder, installation cylinder inside has installation cavity, installation cylinder lateral wall is equipped with the gas outlet pipe that is communicated with installation cavity, gas outlet pipe is inclined upward and extends to upper cover body surface, installation cavity inside slidingly connected has lifting column, lifting column is equipped with steam passage, installation cylinder bottom is equipped with the bottom support of lifting column is supported, bottom support is equipped with through-hole, the gas inlet end of steam passage is located in through-hole in orthographic projection, when steam pressure in pot is larger, lifting column slides along installation cavity, make gas passage and gas outlet pipe communicate, steam in pot is discharged outward from steam passage through gas outlet pipe. Compared with prior art, the utility model has the advantages that the lifting column can automatically adjust the steam pressure in the pot, without the need for user operation, effectively avoiding the problem of liquid overflow in the pot due to untimely operation.

Description

Technical Field

[0001] This utility model relates to the field of cookware technology, and in particular to a pot lid that prevents steam water backflow. Background Technology

[0002] A pot lid is a round object that covers the opening of a pot. It is used to prevent heat loss from the pot and to isolate the pot from the outside environment, as well as to prevent liquid from splashing out. Traditional pot lids have vents on the pot body to prevent the lid from being lifted by the expansion of steam and causing water to overflow from the edge of the lid. However, in actual use, the water vapor inside the pot will liquefy and flow back into the pot from the vents along the inner wall of the lid. When the liquid flows back, it will bring food residues on the lid back into the pot, affecting the taste of the food.

[0003] To address this, pot lids designed to prevent steam backflow have emerged on the market, such as the Chinese utility model patent CN218528458U, entitled "A Multi-Proof Pot Lid for Preventing Overflow, Steam Backflow, and Rebound." This pot lid comprises a noodle cooker body and a multi-proof lid, with an anti-overflow component installed inside. The top surface of the lid body has a through hole and a vent, and the bottom is connected to a connecting block with a threaded rod. A pressure plate is fixed to the bottom end of the threaded rod, and a collection groove is movably installed above the pressure plate. A removable outlet plug is located at the bottom of the collection groove. The anti-overflow component consists of a fixed tube, a movable column, a fixed ring, a spring, a base plate, a vent plug, and a connecting hole. By moving the movable column downwards, the base plate moves downwards, causing the vent plug to disengage from the vent hole, allowing high-temperature steam to escape from the vent hole and preventing liquid from overflowing from the pot.

[0004] However, this design still has some inconveniences in practical use. First, the user needs to manually lower the movable column each time based on the high-temperature expansion inside the pot, which is rather cumbersome. Second, if the user does not operate in time, the high-temperature steam can easily cause the lid to be lifted, resulting in the liquid inside the pot splashing out from the edge of the lid. Utility Model Content

[0005] This invention addresses the problem that the pot body requires manual adjustment of the movable column by the operator according to the condition inside the pot, which is cumbersome and can easily cause liquid to splash out from the edge of the lid if not adjusted in time. The technical problem to be solved by this invention is to provide a pot lid that prevents steam water backflow to solve the above problems.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: It includes a pot lid body, which comprises an upper lid and a lower lid. The lower lid has a mounting cylinder whose upper end is fixed to the upper lid. The mounting cylinder has a mounting cavity. An exhaust pipe communicating with the mounting cavity is provided on the side wall of the mounting cylinder. The exhaust pipe is inclined upwards, and its upper end extends to the surface of the upper lid. A lifting column is slidably connected within the mounting cavity. A steam channel is provided within the lifting column. A support base is provided at the bottom of the mounting cylinder to support the lifting column. A through hole is provided on the support base to connect the pot to the mounting cavity. The orthographic projection of the air inlet of the steam channel is located within the through hole. When the steam pressure inside the pot is low, the air outlet of the steam channel is not connected to the exhaust pipe. When the steam pressure inside the pot is high, the lifting column slides along the mounting cavity, thereby driving the exhaust channel to connect with the exhaust pipe, and the steam inside the pot is discharged outwards from the steam channel through the exhaust pipe.

[0007] A further preferred embodiment of this utility model is: a spring is provided inside the mounting cavity, one end of the spring abuts against the lifting column, and the other end abuts against the bottom surface of the upper cover.

[0008] A further preferred embodiment of this utility model is: the mounting cavity is provided with two symmetrically arranged guide protrusions, and the lifting column is provided with two guide grooves that respectively cooperate with the two guide protrusions.

[0009] A further preferred embodiment of this utility model is that the upper and lower ends of the mounting cylinder are respectively fixed to the middle of the upper cover and the lower cover.

[0010] A further preferred embodiment of this utility model is: the gas outlet pipe has two pipes, which are symmetrically arranged on both sides of the mounting cylinder, and the steam channel has two gas outlet ends, which are located directly below the lower ends of the two gas outlet pipes.

[0011] A further preferred embodiment of this utility model is that the steam channel includes a vertical channel and two branch channels, which together form a Y-shaped steam channel.

[0012] A further preferred embodiment of this utility model is that the slopes of the two air outlet pipes are respectively equal to the slopes of the branch channels connected to them when the lifting column rises.

[0013] A further preferred embodiment of this utility model is: a water collection pipe is provided on the side of the air outlet pipe near the mounting cylinder, which communicates with the water collection pipe and extends downward into the lower cover body, and a water collection bottle is threadedly connected to the lower end of the water collection pipe.

[0014] A further preferred embodiment of this utility model is that the edge at the connection between the water collection pipe and the air outlet pipe has a downwardly recessed water guiding surface.

[0015] A further preferred embodiment of this utility model is as follows: the upper surface of the upper cover is provided with a handle, the handle connecting end is provided with a connecting seat, the connecting seat is detachably connected to the upper cover, the connecting seat is provided in the mounting groove corresponding to the mounting cavity, the upper cover is provided with a mounting hole that connects the mounting groove and the mounting cavity, the mounting cavity is provided with a spring, one end of the spring abuts against the lifting column, and the other end abuts against the bottom of the mounting groove.

[0016] Compared with existing technologies, this invention has the following advantages: An outlet pipe communicating with the mounting cavity is provided on the side wall of the mounting cylinder; a lifting column is slidably installed inside the mounting cavity; and a steam channel is provided inside the lifting column. When the steam pressure inside the pot is low, the outlet of the steam channel is not connected to the outlet pipe, avoiding unnecessary steam discharge; when the steam pressure inside the pot is high, the lifting column automatically rises, connecting the steam channel with the outlet pipe, allowing steam to be discharged. This automatic adjustment mechanism can automatically adjust the connection state between the steam channel and the outlet pipe according to the steam pressure inside the pot, eliminating the need for manual operation of the moving column, simplifying the usage process, reducing the user's operational burden, and effectively preventing liquid overflow from the pot due to untimely operation. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a top view of the present invention;

[0020] Figure 3 This utility model Figure 2 Cross-sectional view at point BB when the steam passage is not connected to the outlet pipe;

[0021] Figure 4 This utility model Figure 2 Cross-sectional view at point BB when the middle steam passage is connected to the outlet pipe;

[0022] Figure 5 This is an exploded view of the present invention.

[0023] In the diagram: 1. Pot lid body; 21. Upper lid body; 212. Mounting hole; 22. Lower lid body; 3. Mounting cylinder; 31. Mounting cavity; 32. Bottom support; 33. Through hole; 34. Guide ridge; 4. Steam outlet pipe; 41. Water guide surface; 5. Lifting column; 51. Steam passage; 511. Vertical passage; 512. Branch passage; 52. Guide groove; 6. Spring; 7. Water collection pipe; 8. Water collection bottle; 9. Handle; 10. Connecting seat; 101. Mounting groove. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0025] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures. Example 1

[0026] This embodiment mainly describes a pot lid that prevents steam backflow, as detailed below:

[0027] like Figures 1 to 5As shown, a pot lid for preventing steam backflow includes a lid body 1, which is composed of an upper lid 21 and a lower lid 22. A cavity exists between the upper lid 21 and the lower lid 22, and their edges are sealed together. An mounting cylinder 3 is fixed to the lower lid 22, with its upper end connected to the upper lid 21. The mounting cylinder 3 has a mounting cavity 31 inside. An exhaust pipe 4 is provided on the side wall of the mounting cylinder 3, tilting upwards and extending its upper end to the surface of the upper lid 21. A lifting column 5 is slidably connected within the mounting cavity 31, with a clearance fit between the lifting column 5 and the mounting cavity 31. A steam channel 51 is provided inside the lifting column 3. A base 32 is provided at the bottom of the mounting cylinder 3, with a through hole 33 on the base 32 connecting the inside of the pot to the mounting cavity 31. The inlet end of the steam channel 51 is projected into the through hole 33. Steam inside the pot can enter the steam channel 51 through the inlet end of the steam channel 51 via the through hole 33. When the steam pressure inside the pot is low, the outlet of the steam channel 51 is not connected to the outlet pipe 4, and the steam inside the pot cannot be discharged. However, when the steam pressure inside the pot is high, the lifting column 5 slides upward along the mounting cavity 31 under the action of the steam pressure inside the pot, connecting the steam channel 51 with the outlet pipe 4, and the steam inside the pot is discharged outward from the steam channel 51 through the outlet pipe 4. This structural design can automatically adjust the steam discharge according to the steam pressure inside the pot, without manual operation, effectively avoiding the problem of liquid overflow inside the pot due to untimely operation. At the same time, the inclined outlet pipe 4 design utilizes the upward trend of steam, allowing the steam to flow more smoothly during discharge and reducing the resistance during steam discharge. This not only improves the venting performance of the pot lid but also reduces the accumulation of pressure inside the pot, further optimizing the use effect of the pot lid.

[0028] like Figure 3 , Figure 4 and Figure 5 As shown, a spring 6 is installed inside the mounting cavity 31. One end of the spring 6 abuts against the lifting column 5, and the other end abuts against the bottom surface of the upper cover 21. The spring 6 provides a downward elastic support force to the lifting column 5, allowing it to stably maintain its initial position when the steam pressure inside the pot is low. The steam outlet of the steam channel 51 is not connected to the steam outlet pipe 4, thus preventing disorderly steam discharge when the pressure inside the pot is low. When the steam pressure inside the pot increases, the steam pressure overcomes the elastic force of the spring 6 and the weight of the lifting column 5, pushing the lifting column 5 upward, connecting the steam channel 51 with the steam outlet pipe 4, and enabling steam discharge. The spring 6 not only improves the stability of the pot lid but also enhances its sensitivity and response speed to changes in steam pressure. When the steam pressure inside the pot decreases, it helps the lifting column 5 to quickly reset, ensuring the normal use of the pot lid.

[0029] like Figure 5As shown, the mounting cavity 31 is also equipped with two symmetrically arranged guide protrusions 34, and the lifting column 5 is equipped with two guide grooves 52 that cooperate with the guide protrusions 34. The guide protrusions 34 and guide grooves 52 can guide the sliding of the lifting column 5, ensuring that the lifting column 5 moves smoothly and steadily up and down in the mounting cavity 31, and preventing it from tilting or getting stuck during the sliding process. This guiding structure makes the pot lid more reliable during use, extends the service life of the pot lid, and also improves the sealing performance and the effect of preventing steam backflow of the pot lid.

[0030] Specifically, the upper and lower ends of the mounting cylinder 3 are fixed to the middle of the upper cover 21 and the lower cover 22, respectively. This structural design allows the mounting cylinder 3 to be centrally positioned within the lid body 1, enabling it to evenly bear the pressure of the steam inside the pot and ensuring the overall structural stability of the lid. Simultaneously, the central positioning of the mounting cylinder 3 facilitates the connection between the steam channel 51 and the vent pipe 4, ensuring that steam can be smoothly discharged from the pot, further optimizing the lid's anti-steam-water backflow function. Furthermore, the design of fixing the mounting cylinder 3 to the middle of the lid body 1 makes the overall structure of the lid more compact and aesthetically pleasing, while also facilitating the installation and use of the lid.

[0031] like Figure 3 and Figure 4 As shown, there are two steam outlet pipes 4, symmetrically arranged on both sides of the mounting cylinder 3. The steam channel 51 has two steam outlet ends, located directly below the lower ends of the two steam outlet pipes 4. When the lifting column 5 rises, the two steam outlet ends of the steam channel 51 connect with the two steam outlet pipes 4 on the corresponding sides. This symmetrical arrangement of the steam outlet pipes 4 and steam channel 51 allows the steam in the pot to be discharged more evenly, avoiding excessive local pressure caused by concentrated steam discharge. At the same time, the symmetrical structural design also makes the pot lid more stable during use.

[0032] Specifically, the steam passage 51 includes a vertical passage 511 and two branch passages 512, which together form a Y-shaped steam passage 51. The Y-shaped steam passage 51 allows steam to be more evenly distributed into the two branch passages 512 after entering the steam passage 51, further improving the steam discharge efficiency.

[0033] Specifically, the slopes of the two exhaust pipes 4 are equal to the slopes of the branch channels 512 connected to the rising column 5 as it rises. This design allows the branch channels 512 of the steam channel 51 to connect more smoothly with the exhaust pipes 4 during the rising of the rising column 5, avoiding steam accumulation or obstructed flow at the connection point due to slope mismatch. This ensures that steam can be discharged more smoothly from the steam channel 51 through the exhaust pipes 4, further improving steam discharge efficiency.

[0034] Specifically, a water collection pipe 7 is provided on the side of the vent pipe 4 near the mounting cylinder 3, and is connected to it. The water collection pipe 7 extends downward and passes through the lower cover 22, and a water collection bottle 8 is threadedly connected to the lower end of the water collection pipe 7. The water collection pipe 7 and the water collection bottle 8 can collect some of the condensed steam water discharged from the vent pipe 4, so that the water after steam liquefaction can be collected in the water collection bottle 8, preventing the water after steam liquefaction from flowing back into the pot and affecting the taste of the food. At the same time, the threaded connection between the water collection bottle 8 and the water collection pipe 7 makes the water collection bottle 8 easy to disassemble and clean, making it convenient for users to clean and replace it regularly.

[0035] Specifically, the edge at the connection between the water collecting pipe 7 and the steam outlet pipe 4 has a downwardly recessed water guiding surface 41. The design of the water guiding surface 41 can guide the steam water condensed from the steam outlet pipe 4, so that the steam water can flow more smoothly to the water collecting pipe 7 when passing through the connection between the water collecting pipe 7 and the steam outlet pipe 4, thereby further improving the steam water collection efficiency and further enhancing the anti-steam water backflow effect of the lid.

[0036] The working principle is as follows:

[0037] Initial state: When the steam pressure inside the pot is low, the lifting column 5 is in the lower position inside the mounting cavity 31. At this time, the steam outlet of the steam channel 51 is not connected to the steam outlet pipe 4. The steam inside the pot enters the mounting cavity 31 through the through hole 33 on the bottom support 32, but because the steam channel 51 is not connected to the steam outlet pipe 4, the steam cannot be discharged and can only accumulate inside the mounting cavity 31.

[0038] Increased steam pressure: As the temperature inside the pot rises, the steam pressure gradually increases. When the steam pressure reaches a certain value, the steam pressure will overcome the gravity of the lifting column 5 and the elastic force of the spring 6, pushing the lifting column 5 to slide upward along the mounting cavity 31.

[0039] Steam passage 51 is connected to exhaust pipe 4: During the ascent of the lifting column 5, the steam passage 51 inside it gradually aligns with the exhaust pipe 4. When the lifting column 5 rises to a certain position, the exhaust port of the steam passage 51 is fully connected to the exhaust pipe 4. At this time, the steam in the pot is discharged through the following path: the steam in the pot enters the steam passage 51 through the through hole 33 on the bottom support 32, and enters the exhaust pipe 4 from the exhaust port of the steam passage 51. Finally, the steam is discharged outside the pot through the exhaust pipe 4 in an upward inclined direction.

[0040] To prevent steam water backflow: the vent pipe 4 is set at an upward angle, and a water collection pipe 7 is provided on the side of the vent pipe 4 near the mounting cylinder 3. The edge of the water collection pipe 7 and the vent pipe 4 has a downward-concave water guiding surface 41. When steam is discharged, the liquefied water droplets will flow into the water collection bottle 8 through the water collection pipe 7, preventing the water droplets from flowing back into the pot.

[0041] Steam pressure decreases: When the steam pressure inside the pot decreases, the lifting column 5 gradually descends under the action of gravity and the elastic force of the spring 6, and the steam outlet of the steam channel 51 gradually disconnects from the steam outlet pipe 4. At this time, the steam inside the pot can no longer be discharged, and the pressure inside the pot gradually returns to equilibrium. Example 2

[0042] The difference between Embodiment 2 and Embodiment 1 is the addition of a handle 9 and improvements to the mounting position of the spring 6, such as... Figure 3 , Figure 4 and Figure 5 As shown, the upper surface of the upper cover 21 is provided with a handle 9, and the connecting end of the handle 9 is provided with a connecting seat 10. The connecting seat 10 is detachably connected to the upper cover 21 and is located in the mounting groove 101 corresponding to the mounting cavity 31. The upper cover 21 is provided with a mounting hole 212 that connects the mounting groove 101 and the mounting cavity 31. A spring 6 is provided inside the mounting cavity 31. One end of the spring 6 abuts against the lifting column 5, and the other end abuts against the bottom of the mounting groove 101. The handle 9 facilitates the user's picking up and placing of the pot lid. The detachable connection between the connecting seat 10 and the upper cover 21 allows the handle 9 to be disassembled and replaced as needed, improving the pot lid's service life and practicality. At the same time, the design of the mounting groove 101 and the mounting hole 212 provides space for the installation and fixing of the spring 6, allowing the spring 6 to stably abut against the lifting column 5 and the bottom of the mounting groove 101, providing stable elastic support for the lifting column 5, thereby ensuring the normal operation of the pot lid and further improving its performance and reliability. The aforementioned detachable connection can be achieved by fixing the connecting seat 10 to the upper cover 21 with screws, or by having external threads on the outer wall of the mounting groove 101 and internal threads on the inner wall of the mounting cylinder 3, with the connecting seat 10 being fixed by engaging the internal threads of the mounting groove 101 with the internal threads of the mounting cylinder 3. This detachable connection between the connecting seat 10 and the upper cover 21 facilitates the removal of the lifting column 5 and spring 6 during cleaning, making it easier to clean the mounting cylinder 3 and the lifting column 5.

[0043] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] The above provides a detailed description of the steam-water backflow prevention pot lid provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The above description of the embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A pot lid that prevents steam backflow, comprising a pot lid body, characterized in that: The pot lid body includes an upper lid and a lower lid. The lower lid has a mounting cylinder fixed to the upper lid at its upper end. The mounting cylinder has a mounting cavity. The side wall of the mounting cylinder is provided with a vent pipe communicating with the mounting cavity. The vent pipe is inclined upward and its upper end extends to the surface of the upper lid. A lifting column is slidably connected in the mounting cavity. The lifting column has a steam channel. The bottom of the mounting cylinder has a support for the lifting column. The support has a through hole that connects the pot to the mounting cavity. The orthographic projection of the air inlet of the steam channel is located in the through hole. When the steam pressure in the pot is low, the air outlet of the steam channel is not connected to the vent pipe. When the steam pressure in the pot is high, the lifting column slides along the mounting cavity, thereby driving the vent channel to connect with the vent pipe. The steam in the pot is discharged from the steam channel through the vent pipe.

2. The pot lid for preventing steam backflow according to claim 1, characterized in that: A spring is provided inside the mounting cavity. One end of the spring abuts against the lifting column, and the other end abuts against the bottom surface of the upper cover.

3. The pot lid for preventing steam backflow according to claim 1, characterized in that: The mounting cavity is provided with two symmetrically arranged guide protrusions, and the lifting column is provided with two guide grooves that respectively cooperate with the two guide protrusions.

4. A pot lid for preventing steam backflow according to claim 1, characterized in that: The upper and lower ends of the mounting cylinder are fixed to the middle of the upper cover and the lower cover, respectively.

5. A pot lid for preventing steam backflow according to claim 4, characterized in that: The gas outlet pipe has two pipes, which are symmetrically arranged on both sides of the mounting cylinder. The steam channel has two gas outlet ends, which are located directly below the lower ends of the two gas outlet pipes.

6. A pot lid for preventing steam backflow according to claim 5, characterized in that: The steam passage includes a vertical passage and two branch passages, which together form a Y-shaped steam passage.

7. A pot lid for preventing steam backflow according to claim 6, characterized in that: The slopes of the two air outlet pipes are equal to the slopes of the branch channels connected to them when the rising column rises.

8. A pot lid for preventing steam backflow according to any one of claims 1 to 7, characterized in that: The air outlet pipe is provided with a water collection pipe on the side near the mounting cylinder, which is connected to the water collection pipe and extends downward into the lower cover. The lower end of the water collection pipe is threadedly connected to a water collection bottle.

9. A pot lid for preventing steam backflow according to claim 8, characterized in that: The edge at the connection between the water collection pipe and the air outlet pipe has a downwardly recessed water guiding surface.

10. A pot lid for preventing steam backflow according to claim 1, characterized in that: The upper surface of the upper cover is provided with a handle, and the handle connection end is provided with a connecting seat. The connecting seat is detachably connected to the upper cover. The connecting seat is provided in the mounting groove corresponding to the mounting cavity. The upper cover is provided with a mounting hole that connects the mounting groove and the mounting cavity. A spring is provided in the mounting cavity. One end of the spring abuts against the lifting column, and the other end abuts against the bottom of the mounting groove.

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