Built-in measuring cup cover

Abstract

The invention relates to the technical field of packaging, in particular to the technical field of liquid quantitative packaging. A built-in measuring cup cover is connected to a packaging container and comprises a cover body, a built-in measuring cup and a valve. The built-in measuring cup is provided with an accommodating space with designed capacity for quantification, and the accommodating space is independent of the internal space of the packaging container; the valve is arranged between the built-in measuring cup and the packaging container, the valve is driven to be opened or closed through the cover or a driving part arranged outside the cover, and communication or separation of the inner space of the packaging container and the containing space of the built-in measuring cup is achieved. During use, the whole packaging inversion valve is opened, liquid in a packaging container flows into the containing space of the built-in measuring cup, then the packaging inversion valve is closed, and the liquid with the specified volume can be obtained by opening the upper cover; the quantitative effect is achieved through cooperation of the built-in measuring cup and the valve, use is convenient, and the problem that an external measuring cup is not sanitary enough in use can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, in particular to the technical field of liquid quantitative packaging, and in particular to a built-in measuring cup cover. Background Art

[0002] Liquid quantitative packaging is widely used in daily necessities, food, condiments, medicines and other fields, bringing many conveniences to people's lives.

[0003] The more common liquid quantitative packaging currently on sale is a packaging with an external measuring cup, that is, a measuring cup is placed outside the lid of the packaging container. When using the liquid product, remove the external measuring cup, open the bottle cap, pour the liquid into the external measuring cup for a certain amount, and then use it. This quantitative packaging form is simple, but there is a problem that cannot be ignored, that is, after the consumer uses the measuring cup, the measuring cup needs to be cleaned and then buckled back to the outside of the lid of the packaging container, and it needs to be cleaned every time it is used. Otherwise, the residual liquid will not only contaminate the outer packaging, but will also affect the next use due to problems such as the growth of microorganisms in the measuring cup, thereby causing health risks. Therefore, although the packaging of these external measuring cups is simple in form, the use process is cumbersome, especially when going out or traveling, when the conditions for cleaning are not available, it will cause obvious problems for consumers to use such products, and the consumer experience is not good.

[0004] Currently, there is a lack of a liquid quantitative packaging that has both quantitative functions and is easy to use and hygienic, and its technical solution is not too complicated. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a built-in measuring cup to solve at least one of the above technical problems.

[0006] In order to achieve the above object, the present invention provides a built-in measuring cup connected to a packaging container, characterized in that it includes a cover, a built-in measuring cup and a valve; The built-in measuring cup has a designed accommodating space for quantitative measurement, and its accommodating space and the internal space of the packaging container are two independent spaces; The valve is arranged between the built-in measuring cup and the packaging container, and is used to realize the connection or separation between the internal space of the packaging container and the accommodating space of the built-in measuring cup. The valve is driven to open or close by the cover or a driving part arranged outside the cover, and the driving mode is either rotation, pressing, or toggling.

[0007] Further preferably, the cover comprises an upper cover and a lower cover, and the valve is a rotary valve, comprising a valve seat and a valve core, and the valve is driven by rotating the upper cover or a driving part arranged outside the upper cover to realize opening and closing.

[0008] Further preferably, the rotary valve is arranged at the bottom of the built-in measuring cup, the valve seat is annular, the valve core and the valve seat are coaxially arranged, and the valve seat and the valve core are each provided with at least one liquid passage. When the valve seat and the valve core rotate relative to each other, the liquid passages are aligned or staggered with each other. When aligned, the valve is opened, and when staggered, the valve is closed.

[0009] Further preferably, the lower end surface of the valve seat is provided with a positioning protrusion or notch, and the valve core is provided with a positioning notch or protrusion, the two cooperate with each other to limit the rotation position of the valve core, so that the liquid through port on the valve core and the liquid through port on the valve seat can be exactly aligned or staggered; the inner wall of the valve seat is provided with a limiting protrusion to limit the axial sliding of the valve core.

[0010] Further preferably, the valve core connecting portion provided on the valve core and the upper cover connecting portion provided on the upper cover or the driving portion provided on the upper cover are detachably connected to each other.

[0011] Further preferably, the valve also includes a gravity valve connected in series with the rotary valve, and when the bottle cap is in a vertical upright position or a position close to a vertical upright position, the gravity valve is closed, and when the bottle cap is in other positions including tilted or inverted, the gravity valve is opened.

[0012] Further preferably, the gravity valve is composed of a sealing surface and a sealing weight portion arranged at the bottom of the annular valve seat, the sealing weight portion is spherical, cylindrical, conical, wedge-shaped, or a combination of the above shapes, and the sealing weight portion is made of one or a combination of several materials selected from plastic, metal, glass, and ceramic.

[0013] Further optionally, the cover includes an upper cover and a lower cover, and the valve is an axial sliding valve, which is composed of a valve seat arranged at the bottom of the built-in measuring cup, a coaxially arranged valve core and an elastic element. The valve core connecting part arranged on the valve core is detachably connected to the upper cover connecting part or the driving part, and the valve core and the valve seat are driven to produce axial relative displacement by pressing or toggling the driving part to achieve opening and closing.

[0014] Further preferably, the end face of the upper cover is a flexible convex surface that is easily deformed, and the driving part is arranged in the flexible convex surface. When pressing force is applied, the driving part moves axially downward, driving the upper cover connecting part to drive the valve core to move axially downward, so that a relative displacement is generated between it and the valve seat, and the valve opens; when the pressing force on the driving part is removed, the valve core is reset under the action of the elastic element, and the valve closes.

[0015] Further preferably, the valve seat is annular, a liquid port is provided on the annular valve seat, and the valve core is piston-shaped; in the initial state of the valve, the valve core is above the liquid port and forms a barrier with the upper part of the annular valve seat, and the valve is closed; in the triggered state of the valve, the valve core is in the middle and lower part of the liquid port, and the valve is open.

[0016] Beneficial effect: The present invention properly controls the timing of connection and isolation between the internal space of the packaging container and the accommodating space of the built-in measuring cup through the arrangement of the built-in measuring cup and the valve, so that when the entire package is inverted, the valve is open, and the liquid in the packaging container flows into the accommodating space of the built-in measuring cup for a certain amount; when the package is placed upright, the valve is closed, and the quantified liquid is stored in the accommodating space of the built-in measuring cup; then, the quantified liquid can be obtained by opening the upper cover, which is easy to use and can well solve the problem of unhygienic use of an external measuring cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] In the attached picture: Figure 1 It is a cross-sectional view of a specific embodiment 1 of the present invention; Figure 2 It is a rotational sectional view and a cross-sectional view of a specific embodiment 2 of the present invention; Figure 3 It is an exploded view from above of a specific embodiment 2 of the present invention; Figure 4 It is a top exploded view of specific embodiment 2 of the present invention; Figure 5 It is a cross-sectional view of a specific embodiment 3 of the present invention; Figure 6 It is a cross-sectional view of specific embodiment 4 of the present invention.

[0019] Among them: 1 is an upper cover, 1.6 is a flexible convex surface, 1.8 is an upper cover connecting part, 2 is a lower cover, 3 is a valve, 3.1 is a valve seat, 3.2 is a valve seat liquid port, 3.3 is a positioning protrusion, 3.4 is a sealing surface, 3.5 is a positioning notch, 3.6 is a valve core, 3.7 is a valve core liquid port, 3.8 is a valve core connecting part, 3.9 is a limiting protrusion, 5 is a packaging container, 6 is a built-in measuring cup, 7 is a driving part, 7.8 is a driving connecting part, 8 is an elastic element, and 9 is a sealing weight part. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments in this application and the features therein may be combined with each other; the described embodiments are only embodiments of a part of the present invention, rather than all of the embodiments; the following description of the embodiments is merely illustrative, to facilitate a better understanding of the present invention, and does not constitute an improper limitation of the present invention; in addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0021] The series of embodiments of the present application and the features contained therein can be applied to various quantitative packaging solutions, such as daily necessities, food, condiments, medicines and other fields. Through the cooperation of the built-in measuring cup and the valve, when the entire package is inverted, the valve is opened, and the liquid in the packaging container flows into the accommodating space of the built-in measuring cup for a certain amount. Then, when the entire package is placed upright, the valve is closed, and the quantitative liquid can be obtained by opening the upper cover. It is easy to use and can well solve the problem of inconvenient use of external measuring cups. The series of embodiments of the present application can also be applied to any other scenarios that require quantitative packaging that can be foreseen in the future.

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] See also Figure 1 , Specific embodiment 1, a built-in measuring cup cover, connected to the packaging container 5, includes an upper cover 1, a lower cover 2, a built-in measuring cup 6 and a valve 3; the built-in measuring cup 6 and the lower cover 2 are integrated, and of course as a change of design, they can also be separated. The built-in measuring cup 6 has a accommodating space of designed capacity for quantitative measurement, and the accommodating space of the built-in measuring cup 6 and the internal space of the packaging container 5 are two independent spaces; the valve 3 is located between the built-in measuring cup 6 and the packaging container 5, and is used to realize the connection or isolation between the internal space of the packaging container 5 and the accommodating space of the built-in measuring cup 6.

[0024] The valve 3 is a rotary valve, comprising a valve seat 3.1 and a valve core 3.6. The valve 3 is driven by rotating a driving part 7 outside the upper cover 1 to realize opening and closing.

[0025] The rotary valve 3 is arranged at the bottom of the built-in measuring cup 6, the valve seat 3.1 is annular, the valve core 3.6 and the valve seat 3.1 are coaxially arranged, the valve seat 3.1 is provided with at least one valve seat liquid through port 3.2, and the valve core 3.6 is also provided with at least one valve core liquid through port 3.7. When the valve seat 3.1 and the valve core 3.6 rotate relative to each other, the liquid through ports are aligned or staggered with each other. When aligned, the valve is opened, and when staggered, the valve is closed.

[0026] The lower end surface of the annular valve seat 3.1 is also provided with a positioning protrusion 3.3, which cooperates with the positioning notch 3.5 provided on the valve core 3.6 to limit the rotation position of the valve core 3.6 so that the liquid through hole 3.7 on the valve core 3.6 and the liquid through hole 3.2 on the annular valve seat 3.1 can be exactly aligned or staggered. The inner wall of the upper edge of the valve seat 3.1 is provided with a limiting protrusion 3.9 to limit the axial sliding range of the valve core 3.6.

[0027] The valve core connection part 3.8 provided on the valve core 3.6 and the driving part 7 provided on the upper cover 1 are detachably connected to each other through the driving connection part 7.8. The valve core 3.6 can be driven to rotate by rotating the driving part 7 to realize the opening or closing of the rotary valve 3.

[0028] In this embodiment, the rotary valve 3 is driven by the driving part 7 disposed outside the upper cover. When the product needs to be used, the driving part 7 is rotated to the open position, and then the entire package is turned upside down. After the built-in measuring cup 6 is filled with liquid, the driving part 7 is rotated to the closed position, and then the package is placed upright and the upper cover is opened to obtain the quantitative liquid product. After use, the upper cover can be closed without any cleaning work, which is convenient and hygienic.

[0029] See also Figures 2 to 4 , Specific embodiment 2, a built-in measuring cup cover, connected to the packaging container 5, includes an upper cover 1, a lower cover 2, a built-in measuring cup 6 and a valve 3; the built-in measuring cup 6 and the lower cover are integrated, and of course as a change of design, they can also be separated, the built-in measuring cup 6 has a accommodating space of designed capacity for quantitative measurement, and its accommodating space and the internal space of the packaging container 5 are two independent spaces; the valve 3 is arranged between the built-in measuring cup 6 and the packaging container 5, and is used to realize the connection or isolation between the internal space of the packaging container 5 and the accommodating space of the built-in measuring cup 6.

[0030] The valve 3 is a rotary valve, comprising a valve seat 3.1 and a valve core 3.6, and the valve is driven by rotating the upper cover to open and close.

[0031] The rotary valve is arranged at the bottom of the built-in measuring cup, the valve seat 3.1 is annular, the valve core 3.6 and the valve seat 3.1 are coaxially arranged, the valve seat 3.1 is provided with at least one valve seat liquid through port 3.2, and the valve core 3.6 is also provided with at least one valve core liquid through port 3.7. When the valve seat 3.1 and the valve core 3.7 rotate relative to each other, the liquid through ports are aligned or staggered with each other, the valve is opened when aligned, and the valve is closed when staggered.

[0032] The lower end surface of the annular valve seat 3.1 is also provided with a positioning protrusion 3.3, and a positioning notch 3.5 is provided on the valve core, which cooperate with each other to limit the rotation position of the valve core 3.6, so that the valve core liquid through port 3.7 on the valve core 3.6 and the valve seat liquid through port 3.2 on the annular valve seat 3.1 can be exactly aligned or staggered. The inner wall of the upper edge of the annular valve seat 3.1 is provided with a limiting protrusion 3.9 to limit the axial sliding range of the valve core 3.6.

[0033] The valve core connection part 3.8 provided on the valve core 3.6 is detachably connected to the upper cover connection part 1.8 provided on the upper cover 1. The valve core 3.6 is driven to rotate by rotating the upper cover 1, thereby realizing the opening or closing of the rotary valve.

[0034] The valve 3 also includes a gravity valve connected in series with the rotary valve. When the bottle cap is in a vertical or nearly vertical position, the gravity valve is closed. When the bottle cap is in other positions including tilted or inverted, the gravity valve is opened.

[0035] The gravity valve is composed of a sealing surface 3.4 arranged at the bottom of the annular valve seat 3.1 and a sealing weight portion 9. The sealing weight portion 9 of this embodiment is spherical. Of course, the sealing weight portion 9 can also be spherical, cylindrical, conical, wedge-shaped, or a combination of the above shapes. The sealing weight portion 9 is made of one or a combination of several materials such as plastic, metal, glass, and ceramic.

[0036] In this embodiment, the valve core 3.6 is driven to rotate by the rotation of the upper cover 1. When the upper cover 1 is covered, the rotary valve 3 is in an open state, and when the upper cover 1 is opened, the rotary valve 3 is in a closed state. When the product needs to be used, the entire package only needs to be inverted, and the gravity valve automatically opens. At this time, since the upper cover is covered, the rotary valve is also in an open state, and the accommodation space of the built-in measuring cup 6 is connected to the internal space of the packaging container 5, and the liquid product flows to the accommodation space of the built-in measuring cup 6. After the built-in measuring cup 6 is filled with liquid, the entire package is placed upright, and the gravity valve is automatically closed at this time, and the quantitative liquid product remains in the built-in measuring cup 6. At this time, the upper cover is opened to pour out the liquid product. Although the gravity valve will open in this state, since the upper cover is in an open state, the rotary valve is closed, so that the quantitative liquid product can be easily obtained. After use, the upper cover can be covered, and no cleaning work is required. The opening and closing of the valve during the entire use process are automatic, and no additional operation by consumers is required, and the use experience is better.

[0037] See also Figure 5 , Specific embodiment 3, a built-in measuring cup cover, connected to the packaging container 5, includes an upper cover 1, a lower cover 2, a built-in measuring cup 6 and a valve 3; the built-in measuring cup 6 and the lower cover are integrated, of course, as a variation of the design can also be separated, the built-in measuring cup 6 has a accommodating space of designed capacity for quantitative measurement, and its accommodating space and the internal space of the packaging container 5 are two independent spaces; the valve 3 is arranged between the built-in measuring cup 6 and the packaging container 5, and is used to realize the connection or separation between the internal space of the packaging container 5 and the accommodating space of the built-in measuring cup 6.

[0038] The valve 3 is an axial sliding valve, which is composed of a valve seat 3.1 arranged at the bottom of the built-in measuring cup 6, a coaxially arranged valve core 3.6 and an elastic element 8. The valve core connecting part 3.8 and the driving part connecting part 7.8 arranged on the valve core 3.6 are detachably connected to each other. The valve core 3.6 and the valve seat 3.1 are driven to produce relative displacement by turning the driving part 7 to achieve opening and closing.

[0039] The valve seat 3.1 is annular, and a valve seat liquid passage 3.2 is provided on the annular valve seat 3.1. The valve core 3.6 is piston-shaped. In the initial state of the valve 3, the valve core 3.6 is located above the valve seat liquid passage 3.2, forming a barrier with the upper part of the annular valve seat 3.1, and the valve 3 is closed. When the valve 3 is in the triggered state, the valve core 3.6 is located in the middle and lower part of the valve seat liquid passage 3.2, and the valve 3 is opened.

[0040] In this embodiment, the axial slide valve 3 is driven by the driving connection part 7.8 provided at the lower part of the driving part 7. When the product needs to be used, the driving part 7 only needs to be turned to the open position, and then the entire package is turned upside down. After the built-in measuring cup 6 is filled with liquid, the driving part 7 is turned to the closed position, and then the package is placed upright and the upper cover is opened to obtain the quantitative liquid product. After use, the upper cover can be closed without any cleaning work, which is convenient and hygienic.

[0041] See also Figure 6 , Specific embodiment 4, a built-in measuring cup cover, connected to the packaging container 5, includes an upper cover 1, a lower cover 2, a built-in measuring cup 6 and a valve 3; the built-in measuring cup 6 and the lower cover are integrated, and of course as a change of design, they can also be separated, the built-in measuring cup 6 has a accommodating space of designed capacity for quantitative measurement, and its accommodating space and the internal space of the packaging container 5 are two independent spaces; the valve 3 is arranged between the built-in measuring cup 6 and the packaging container 5, and is used to realize the connection or partition between the internal space of the packaging container 5 and the accommodating space of the built-in measuring cup 6.

[0042] The valve 3 is an axial sliding valve, which is composed of a valve seat 3.1 arranged at the bottom of the built-in measuring cup 6, a coaxially arranged valve core 3.6 and an elastic element 8. The valve core 3.6 is provided with a valve core connecting part 3.8 which is detachably connected to the upper cover connecting part 1.8. The valve core 3.6 and the valve seat 3.1 are driven to produce relative displacement by pressing the driving part 7 to achieve opening and closing.

[0043] The end face of the upper cover 1 is a flexible convex surface 1.6 that is easily deformed. The driving part 7 is arranged in the flexible convex surface 1.6. When a pressing force is applied, the driving part 7 moves axially downward, driving the upper cover connecting part 1.8 to drive the valve core 3.6 to move axially downward, so that a relative displacement is generated between it and the valve seat 3.1, and the valve opens; when the pressing force on the driving part 7 is removed, the valve core 3.6 is reset under the action of the elastic element 8, and the valve closes.

[0044] The valve seat 3.1 of this embodiment is annular, and a liquid through port 3.2 is provided on the annular valve seat 3.1, and the valve core 3.6 is piston-shaped; in the initial state of the valve 3, the valve core 3.6 is located above the valve seat liquid through port 3.2, and forms a barrier with the upper part of the annular valve seat 3.1, and the valve 3 is closed; when the valve 3 is in the trigger position, the valve core 3.6 is located in the middle and lower part of the valve seat liquid through port 3.2, and the valve 3 is open.

[0045] In this embodiment, the axial slide valve 3 is driven by the driving part 7 arranged in the flexible convex surface. When the product needs to be used, the driving part 7 is pressed down, and then the whole package is turned upside down. After the built-in measuring cup 6 is filled with liquid, the driving part 7 is released and reset, and then the package is placed upright and the upper cover is opened to obtain the quantitative liquid product. After use, the upper cover can be closed without any cleaning work, which is convenient and hygienic.

[0046] In summary, it can be seen from several embodiments that as long as the built-in measuring cup and various types of valves are cleverly designed and properly matched, the timing of the connection and separation between the internal space of the packaging container and the accommodating space of the built-in measuring cup is controlled, so that the valve is opened when the entire package is inverted, the liquid product in the packaging container can flow into the accommodating space of the built-in measuring cup, and the valve is closed in time when the package is placed upright, and the quantitative liquid is stored in the accommodating space of the built-in measuring cup, and then the upper cover is opened to obtain the quantitative product, and the design purpose can be achieved. In particular, the setting of the gravity valve in series makes it almost unnecessary for consumers to intervene in the opening and closing of the valve, achieving complete automation and greatly improving the consumer experience. Each of the above embodiments includes or partially includes these technical features, that is, as long as these technical features are reasonably combined or selectively used or partially used, many different implementation cases can be designed to achieve the purpose of convenient use, and the problem of unhygienic use of external measuring cups is well solved, thereby improving the consumer experience.

[0047] The above are only optional implementation modes of the present invention. It should be pointed out that, for ordinary technicians in this technical field, it is possible to make several improvements and modifications based on the principles of the present invention without making any creative work. All other embodiments obtained thereby should be regarded as within the scope of protection of the present invention.

Claims

1. A built-in measuring cup cover connected to a packaging container, characterized in that: Includes lid, built-in measuring cup and valve; The built-in measuring cup has a designed accommodating space for quantitative measurement, and its accommodating space and the internal space of the packaging container are two independent spaces; The valve is arranged between the built-in measuring cup and the packaging container, and is used to realize the connection or separation between the internal space of the packaging container and the accommodating space of the built-in measuring cup. The valve is driven to open or close by the cover or a driving part arranged outside the cover, and the driving mode is either rotation, pressing, or toggling.

2. A built-in measuring cup cover according to claim 1, characterized in that: The cover comprises an upper cover and a lower cover, and the valve is a rotary valve, comprising a valve seat and a valve core. The valve is driven by rotating the upper cover or a driving part arranged outside the upper cover to realize opening and closing.

3. A built-in measuring cup cover according to claim 2, characterized in that: The rotary valve is arranged at the bottom of the built-in measuring cup, the valve seat is annular, the valve core and the valve seat are coaxially arranged, and the valve seat and the valve core are each provided with at least one liquid passage. When the valve seat and the valve core rotate relative to each other, the liquid passages are aligned or staggered with each other. When aligned, the valve is opened, and when staggered, the valve is closed.

4. A built-in measuring cup cover according to claim 3, characterized in that: The lower end surface of the valve seat is provided with a positioning protrusion or notch, and the valve core is provided with a positioning notch or protrusion, which cooperate with each other to limit the rotation position of the valve core so that the liquid through hole on the valve core and the liquid through hole on the valve seat can be exactly aligned or staggered; the inner wall of the valve seat is provided with a limiting protrusion to limit the axial sliding of the valve core.

5. A built-in measuring cup cover according to any one of claims 2 to 4, characterized in that: The valve core connecting portion arranged on the valve core and the upper cover connecting portion arranged on the upper cover or the driving portion arranged on the upper cover are connected to each other in a detachable manner.

6. A built-in measuring cup cover according to claim 5, characterized in that: The valve also includes a gravity valve connected in series with the rotary valve. When the bottle cap is in a vertical or nearly vertical position, the gravity valve is closed, and when the bottle cap is in other positions including tilted or inverted, the gravity valve is opened.

7. A built-in measuring cup cover according to claim 6, characterized in that: The gravity valve is composed of a sealing surface and a sealing weight portion arranged at the bottom of the annular valve seat. The sealing weight portion is spherical, cylindrical, conical, wedge-shaped, or a combination of the above shapes. The sealing weight portion is made of one or a combination of several materials such as plastic, metal, glass, and ceramic.

8. The built-in measuring cup cover according to claim 1, characterized in that: The cover comprises an upper cover and a lower cover, and the valve is an axial sliding valve, which is composed of a valve seat arranged at the bottom of the built-in measuring cup, a coaxially arranged valve core and an elastic element. The valve core connecting part arranged on the valve core is detachably connected to the upper cover connecting part or the driving part, and the valve core and the valve seat are driven to produce axial relative displacement by pressing or toggling the driving part to achieve opening and closing.

9. A built-in measuring cup cover according to claim 8, characterized in that: The end face of the upper cover is a flexible convex surface that is easily deformed. The driving part is arranged in the flexible convex surface. When pressing force is applied, the driving part moves axially downward, driving the upper cover connecting part to drive the valve core to move axially downward, so that a relative displacement is generated between it and the valve seat, and the valve opens; when the pressing force on the driving part is removed, the valve core is reset under the action of the elastic element, and the valve closes.

10. A built-in measuring cup cover according to claim 8 or 9, characterized in that: The valve seat is annular, a liquid passage is arranged on the annular valve seat, and the valve core is piston-shaped; in the initial state of the valve, the valve core is located above the liquid passage and forms a barrier with the upper part of the annular valve seat, and the valve is closed; in the triggered state of the valve, the valve core is located in the middle and lower part of the liquid passage, and the valve is open.

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