Valve structure

Abstract

The invention provides a valve structure, and relates to the technical field of gas cylinder valves. A temperature sensing element is arranged in a mounting shell, the two ends of the temperature sensing element are connected with a pushing assembly and a sealing valve correspondingly, pushing force generated by the pushing assembly acts on the sealing valve, and opening or closing of a discharging channel in a valve body is manually controlled; the temperature sensing element can sense the temperature, when the temperature reaches a set value, the temperature sensing element breaks and loses efficacy, the sealing valve is opened, gas is discharged through the discharging channel, and the high-temperature discharging function is achieved, so that the valve structure integrates the manual discharging function and the high-temperature discharging function, and the double function is achieved through the size of one valve; the volume of the valve is saved, and the technical problem that in the prior art, performance and functions of the valve are lost due to a traditional method for solving the volume of the cylinder valve is solved.

Description

Technical Field

[0001] The invention relates to the technical field of gas cylinder valves, and in particular to a valve structure. Background Art

[0002] Hydrogen energy has become the most promising new green energy in the 21st century due to its high efficiency and environmental protection. However, the subsequent hydrogen and liquid hydrogen storage, transportation, vehicle operation technology, and unguaranteed safety performance have seriously hindered its large-scale development. Currently, the most common hydrogen storage method used in the hydrogen energy industry is to use gas cylinders to store hydrogen. Providing stable pressure and flow of hydrogen to the reactor through valves and pipeline systems is one of the problems facing the hydrogen energy industry at this stage.

[0003] Currently, hydrogen cylinder valves are in the development and research stage in vehicle-mounted hydrogen storage systems. Their main function is to ensure that the fuel cell stack obtains a stable hydrogen environment. In order to reduce the overall volume, the valve needs to be designed to be as small as possible.

[0004] However, the traditional method to solve the volume of bottle valves is to reduce the structural size or reduce the valve function. Reducing the structural size, whether reducing the wall thickness or reducing the size of the valve, will cause a relative decrease in valve performance. If the valve function is reduced, the safety of the valve will be greatly reduced. Summary of the invention

[0005] The object of the present invention is to provide a valve structure to alleviate the technical problem that the traditional method of solving the volume of bottle valves in the prior art causes the loss of valve performance and function.

[0006] The valve structure provided by the present invention comprises: a valve body, a sealing valve, a mounting shell, a temperature sensing element and a driving assembly;

[0007] One end of the sealing valve extends into the mounting shell and is movable in the mounting shell, and the other end of the sealing valve extends into the valve body, and the sealing valve is used to block the discharge channel in the valve body;

[0008] The temperature sensing element is arranged in the installation shell, and the temperature sensing element is configured to be able to rupture or melt due to heat. One end of the temperature sensing element is connected to the sealing valve, and the pushing component extends into the installation shell and is connected to the other end of the temperature sensing element. The pushing component is used to drive the sealing valve to retract or extend from the installation shell to control the opening or closing of the discharge channel in the valve body.

[0009] In an alternative embodiment,

[0010] The pushing assembly includes a push rod and a base;

[0011] The base is arranged in the installation shell, one end of the push rod extends into the installation shell and is connected with the base, and the other end of the push rod extends out of the installation shell.

[0012] In an alternative embodiment,

[0013] The mounting housing has a first through hole and a second through hole that are interconnected;

[0014] The push rod is threadedly connected to the hole wall of the first through hole;

[0015] The base and the sealing valve slide in the second through hole.

[0016] In an alternative embodiment,

[0017] The aperture of the first through hole is smaller than the aperture of the second through hole, so that a step surface is formed at the connection between the first through hole and the second through hole, and the step surface is used to abut against the base to prevent the base (520) and the temperature sensing element (400) from sliding out of the installation shell (300).

[0018] In an alternative embodiment,

[0019] A first clamping groove is provided on a side of the base away from the push rod, the first clamping groove opening toward the temperature sensing element;

[0020] The sealing valve is provided with a second clamping groove opening toward the temperature sensing element;

[0021] Two ends of the temperature sensing element extend into the first clamping groove and the second clamping groove respectively.

[0022] In an alternative embodiment,

[0023] A first buffer pad is arranged in the first clamping groove, a second buffer pad is arranged in the second clamping groove, and two ends of the temperature sensing element are respectively in contact with the first buffer pad and the second buffer pad.

[0024] In an alternative embodiment,

[0025] The sealing valve comprises a first valve segment, a second valve segment and a third valve segment connected in sequence;

[0026] The valve body has a first sealing hole connected to the discharge channel, and the conical sealing surface formed at the end of the first valve section extends into the first sealing hole to block the discharge channel;

[0027] The third valve segment extends into the installation shell, and the outer surface of the third valve segment is recessed in the radial direction to form a waterproof installation groove, the waterproof installation groove is used to install a waterproof ring, and the waterproof ring is connected to the inner wall of the installation shell by interference fit;

[0028] The outer diameter of the first valve segment is smaller than the outer diameter of the second valve segment;

[0029] The outer diameter of the second valve segment is smaller than the outer diameter of the third valve segment.

[0030] In an alternative embodiment,

[0031] The valve structure also includes a blocking ring and a sealing ring;

[0032] The outer surface of the first valve section is recessed in the radial direction to form a sealing installation groove, the blocking ring and the sealing ring are both arranged in the sealing installation groove, and the blocking ring is located on the side of the sealing ring away from the end face of the sealing ring subjected to medium force.

[0033] In an alternative embodiment,

[0034] The bottom of the sealing installation groove has a sealing slope, and the inner ring of the blocking ring has a blocking ring slope. When the first valve section is subjected to medium force, the sealing ring pushes the blocking ring so that the blocking ring slope moves along the sealing slope until the blocking ring slope fits with the sealing slope, and the outer circumference of the blocking ring fits with the inner wall of the valve housing to prevent the sealing ring from being squeezed out.

[0035] In an alternative embodiment,

[0036] The valve structure also includes an elastic member;

[0037] The elastic member is sleeved on the second valve section;

[0038] The valve body has a second sealing hole connected to the first sealing hole, the first sealing hole (110) and the second sealing hole (120) are coaxially arranged, and the aperture of the second sealing hole (120) is larger than the aperture of the first sealing hole (110), and a connecting surface is formed at the connection between the first sealing hole (110) and the second sealing hole (120), one end of the elastic member abuts against the connecting surface, and the other end of the elastic member abuts against the third valve section, and the elastic member is configured to enable the sealing valve to have a movement tendency toward moving closer to the pushing assembly.

[0039] The valve structure provided by the present invention has a temperature sensing element arranged in an installation shell, and two ends of the temperature sensing element are respectively connected to a pushing assembly and a sealing valve. The pushing force generated by the pushing assembly acts on the sealing valve, and the opening or closing of the discharge channel in the valve body is manually controlled. The valve structure has a manual discharge function, and the temperature sensing element can sense the temperature. When the temperature reaches a set value, the temperature sensing element ruptures and fails, the sealing valve opens, and the gas is discharged through the discharge channel. The valve structure has a high-temperature discharge function, so that the valve structure has the functions of manual discharge and high-temperature discharge, and completes double functions with the volume of one valve, which saves the valve volume and alleviates the technical problem of the traditional method of solving the volume of the bottle valve in the prior art causing the loss of valve performance and function. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of the overall structure of a valve structure provided by an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of the structure of the housing installed in the valve structure provided in an embodiment of the present invention;

[0043] Figure 3 A schematic structural diagram of an enlarged installation view of a sealing valve in a valve structure provided in an embodiment of the present invention;

[0044] Figure 4 A schematic diagram of the enlarged structure of the installation of the blocking ring and the sealing ring in the valve structure provided in an embodiment of the present invention.

[0045] Icon: 100-valve body; 110-first sealing hole; 120-second sealing hole; 130-third sealing hole; 140-discharge channel; 200-sealing valve; 210-first valve section; 211-sealing installation groove; 212-sealing slope; 220-second valve section; 230-third valve section; 231-second clamping groove; 232-second buffer pad; 233-waterproof ring; 300-installation shell; 310-first through hole; 320-second through hole; 400-temperature sensing element; 500-pushing assembly; 510-push rod; 520-base; 521-first clamping groove; 522-first buffer pad; 600-blocking ring; 610-blocking ring slope; 700-sealing ring; 800-elastic member. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] like Figure 1 As shown, the valve structure provided in this embodiment includes: a valve body 100, a sealing valve 200, a mounting shell 300, a temperature sensing element 400 and a pushing assembly 500; the valve body 100 is provided with a discharge channel 140 and a valve mounting hole, the valve mounting hole is connected to the discharge channel 140, one end of the sealing valve 200 extends into the valve mounting hole, the sealing valve 200 can block the discharge channel 140, move in the valve mounting hole, and control the opening or closing of the discharge channel 140.

[0048] The other end of the sealing valve 200 extends into the mounting housing 300 and can move in the mounting housing 300 . The mounting housing 300 serves to limit the moving direction of the sealing valve 200 .

[0049] The temperature sensing element 400 is arranged in the installation shell 300. The temperature sensing element 400 is configured to be able to rupture or melt due to heat. One end of the temperature sensing element 400 is connected to the sealing valve 200, and the pushing component 500 extends into the installation shell 300 and is connected to the other end of the temperature sensing element 400. Specifically, the temperature sensing element 400 is a glass temperature sensing element. The temperature sensing element 400 senses temperature changes more quickly. When a fire occurs in a gas cylinder or a cylinder valve, the temperature sensing element 400 absorbs heat and the temperature rises rapidly. After reaching a certain temperature, it automatically ruptures and disconnects the connection between the pushing component 500 and the sealing valve 200, so that the sealing valve 200 opens the discharge channel 140, so that the gas can flow out quickly, realizing the high-temperature automatic discharge function; the temperature sensing element 400 can also be set to an alloy material, which automatically melts after reaching a certain temperature. Temperature sensing elements of different materials are selected according to actual conditions.

[0050] The two ends of the temperature sensing element 400 are respectively connected to the pushing component 500 and the sealing valve 200. The driving force generated by the pushing component 500 directly acts on the temperature sensing element 400, thereby driving the sealing valve 200 to retract or extend into the mounting shell 300 to control the opening or closing of the discharge channel 140 in the valve body 100, thereby realizing the manual discharge function.

[0051] The valve structure provided in the present embodiment has a temperature sensing element 400 arranged in the mounting shell 300, and the two ends of the temperature sensing element 400 are respectively connected to the pushing assembly 500 and the sealing valve 200, and the pushing force generated by the pushing assembly 500 acts on the sealing valve 200, and the opening or closing of the discharge channel 140 in the valve body 100 is manually controlled, and has a manual discharge function. The temperature sensing element 400 can sense the temperature. When the temperature reaches the set value, the temperature sensing element 400 ruptures and fails, the sealing valve 200 opens, and the gas is discharged through the discharge channel 140, and has a high-temperature discharge function, so that the valve structure has the functions of manual discharge and high-temperature discharge, and completes double functions with the volume of one valve, which saves the valve volume and alleviates the technical problem of the traditional method of solving the volume of the bottle valve body 100 in the prior art causing the loss of valve performance and function.

[0052] On the basis of the above embodiments, in an optional implementation manner, the pushing assembly 500 in the valve structure provided in this embodiment includes a push rod 510 and a base 520; the base 520 is arranged in the mounting shell 300, and the base 520 can slide in the mounting shell 300, one end of the push rod 510 extends into the mounting shell 300 and is connected to the base 520, and the other end of the push rod 510 extends out of the mounting shell 300. The staff uses the end of the push rod 510 extending out of the mounting shell 300 to control the movement of the push rod 510, thereby driving the sealing valve 200 to move and control the opening or closing of the discharge channel 140.

[0053] It should be noted that the push rod 510 and the base 520 can be set as a split structure, that is, the end of the push rod 510 extending into the mounting housing 300 abuts against the base 520. Figure 1 For example, when the push rod 510 is rotated in the forward direction, the push rod 510 moves to the right, pushing the base 520 to move toward the direction close to the discharge channel 140, thereby driving the sealing valve 200 to block the discharge channel 140. When the push rod 510 is rotated in the reverse direction, the push rod 510 moves to the left, and the high-pressure gas in the discharge channel 140 pushes the sealing valve 200 to move to the left, driving the temperature sensing element 400 and the base 520 to move to the left together, and the discharge channel 140 is opened.

[0054] like Figure 2 As shown, in an optional embodiment, the mounting shell 300 has a first through hole 310 and a second through hole 320 that are interconnected; the push rod 510 is threadedly connected to the hole wall of the first through hole 310, and by screwing the push rod 510, the rotational force is converted into a driving force, driving the base 520 and the sealing valve 200 to slide in the second through hole 320.

[0055] It should be noted that when manual discharge is required, the push rod 510 is rotated to move the push rod 510 in the direction of extending out of the mounting shell 300. Since the internal gas of the discharge channel 140 acts on the conical surface at the end of the sealing valve 200, the gas pushes the sealing valve 200 to move in the direction of extending into the mounting shell 300, and the discharge channel 140 opens.

[0056] In an optional embodiment, the aperture of the first through hole 310 is smaller than the aperture of the second through hole 320, so that a step surface is formed at the connection between the first through hole 310 and the second through hole 320, and the outer diameter of the base 520 is larger than the aperture of the first through hole 310. When the push rod 510 and the base 520 are a split structure, when the high-pressure gas in the discharge channel 140 pushes the sealing valve 200 to move to the left, the step surface can resist the base 520, limit the movement range of the base 520, and thereby prevent the base 520 and the temperature sensing element 400 from slipping out of the mounting shell 300.

[0057] It should be noted that when the base 520 and the push rod 510 are an integrated structure, the provision of the step surface can also prevent the push rod 510 from being screwed out of the mounting housing 300 .

[0058] In an optional embodiment, a side of the base 520 away from the push rod 510 is provided with a first clamping groove 521 opening toward the temperature sensing element 400; the sealing valve 200 is provided with a second clamping groove 231 opening toward the temperature sensing element 400; and both ends of the temperature sensing element 400 extend into the first clamping groove 521 and the second clamping groove 231 respectively.

[0059] Specifically, a circular protrusion is formed on one side of the base 520 away from the push rod 510 and extends in a direction away from the push rod 510. The circular protrusion surrounds a first clamping groove 521, and a first buffer pad 522 can be optionally set in the first clamping groove 521. The end of the sealing valve 200 close to the temperature sensing element 400 is recessed inward to form a second clamping groove 231, and a second buffer pad 232 can be optionally set in the second clamping groove 231. The two ends of the temperature sensing element 400 are respectively abutted against the first buffer pad 522 and the second buffer pad 232.

[0060] like Figure 3As shown, in an optional embodiment, the sealing valve 200 includes a first valve segment 210, a second valve segment 220 and a third valve segment 230 connected in sequence; the outer diameter of the first valve segment 210 is smaller than the outer diameter of the second valve segment 220; the outer diameter of the second valve segment 220 is smaller than the outer diameter of the third valve segment 230, and the valve body 100 has a first sealing hole 110, a second sealing hole 120 and a third sealing hole 130, and the first sealing hole 110 is communicated with the discharge channel 140, The first valve segment 210 moves in the first sealing hole 110, and the conical sealing surface formed at the end of the first valve segment 210 extends into the first sealing hole 110 to block the discharge channel 140. The second valve segment 220 is located in the second sealing hole 120, and the mounting shell 300 is inserted into the third sealing hole 130. In addition, the outer surface of the mounting shell 300 has an external thread section, and the inner wall of the third sealing hole 130 has an internal thread section, so that the mounting shell 300 is threadedly connected to the third sealing hole 130.

[0061] The third valve section 230 extends into the installation shell 300, and the outer surface of the third valve section 230 is recessed in the radial direction to form a waterproof installation groove, and the waterproof installation groove is used to install a waterproof ring 233. The waterproof ring 233 can be specifically set as an O-ring. The waterproof ring 233 is connected to the inner wall of the installation shell 300 by interference fit to prevent gas and liquid from entering the interior of the installation shell 300 along the gap between the third valve section 230 and the inner wall of the installation shell 300.

[0062] like Figure 4 As shown, in an optional embodiment, the valve structure also includes a blocking ring 600 and a sealing ring 700; the outer surface of the first valve section 210 is recessed in the radial direction to form a sealing installation groove 211, and the blocking ring 600 and the sealing ring 700 are both arranged in the sealing installation groove 211, and the blocking ring 600 is located on the side of the sealing ring 700 away from the end face of the sealing ring 700 subjected to medium force.

[0063] Specifically, when the high pressure gas acts on the conical surface at the end of the first valve segment 210, Figure 4For example, the first valve section 210 is pushed to move leftward, and the first valve section 210 pushes the end face of the sealing ring 700 subjected to medium force to move leftward, and the blocking ring 600 prevents the sealing ring 700 from escaping from the sealing installation groove 211. It should be noted that the end face subjected to medium force is specifically a side face of the sealing ring 700 close to the discharge channel 140. In an optional embodiment, the bottom of the sealing installation groove 211 has a sealing slope 212, and the inner ring of the blocking ring 600 has a blocking ring slope 610. When the first valve section 210 is subjected to medium force, the sealing ring 700 pushes the blocking ring 600 so that the blocking ring slope 610 moves along the sealing slope 212 until the blocking ring slope 610 fits with the sealing slope 212, and the outer circumference of the blocking ring 600 fits with the inner wall of the valve housing to prevent the sealing ring 700 from being squeezed out.

[0064] Specifically, when high-pressure gas acts on the first valve segment 210, the medium force pushes the first valve segment 210 to move, and the blocking ring 600 and the sealing ring 700 form a high-pressure sealing pair that resists the medium force. Under the pressure load, the sealing ring 700 tends to overflow into the gap during the squeezing process between the inner wall of the valve body 100 and the wall of the first valve segment 210. At this time, under the push of the sealing ring 700, the blocking ring slope 610 on the blocking ring 600 moves along the sealing slope 212 like climbing a slope to fill the gap until the blocking ring slope 610 is completely fitted with the sealing slope 212, and the outer circumference of the blocking ring 600 is fitted with the inner wall of the valve body 100. The blocking ring 600 forms a complete support for the sealing ring 700 to prevent the sealing ring 700 from being squeezed out, thereby achieving reliable sealing under high pressure.

[0065] In an optional embodiment, the valve structure also includes an elastic member 800, which is specifically configured as a compression spring, and the elastic member 800 is sleeved on the second valve segment 220; the first sealing hole 110 and the second sealing hole 120 are coaxially arranged, and the aperture of the second sealing hole 120 is larger than the aperture of the first sealing hole 110, and a connecting surface is formed at the connection between the first sealing hole 110 and the second sealing hole 120, one end of the elastic member 800 is connected to the connecting surface, and the other end of the elastic member 800 is connected to the third valve segment 230, and the elastic member 800 is configured to enable the sealing valve 200 to have a movement tendency toward moving toward the push assembly 500. When manual discharge is required, the push rod 510 is screwed to move the push rod 510 in the direction of extending out of the mounting shell 300. Due to the action of the internal gas in the discharge channel 140 and the elastic force of the elastic member 800, the gas pushes the sealing valve 200 to move in the direction of extending into the mounting shell 300, and the discharge channel 140 is opened.

[0066] The valve structure provided in this embodiment integrates the manual relief valve and the high-temperature relief valve, and finally completes the double function with the volume of one valve; the variable diameter structure of the mounting housing 300 can prevent the problem of the push rod 510 being screwed out due to misoperation of the manual relief valve, that is: when the operator screws it out too much, the step surface will prevent the base 520 from being sprayed with gas and causing danger.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve structure, characterized in that: include: A valve body (100), a sealing valve (200), a mounting housing (300), a temperature sensing element (400) and a pushing assembly (500); One end of the sealing valve (200) extends into the mounting shell (300) and is movable in the mounting shell (300), and the other end of the sealing valve (200) extends into the valve body (100), and the sealing valve (200) is used to block the discharge channel (140) in the valve body (100); The temperature sensing element (400) is arranged in the installation shell (300), and the temperature sensing element (400) is configured to be able to rupture or melt when heated. One end of the temperature sensing element (400) is connected to the sealing valve (200), and the pushing component (500) extends into the installation shell (300) and is connected to the other end of the temperature sensing element (400). The pushing component (500) is used to drive the sealing valve (200) to retract into or extend out of the installation shell (300) to control the discharge channel (140) in the valve body (100) to be opened or closed.

2. The valve structure according to claim 1, characterized in that: The pushing assembly (500) comprises a push rod (510) and a base (520); The base (520) is arranged in the installation shell (300), one end of the push rod (510) extends into the installation shell (300) and is connected to the base (520), and the other end of the push rod (510) extends out of the installation shell (300).

3. The valve structure according to claim 2, characterized in that: The mounting housing (300) has a first through hole (310) and a second through hole (320) which are communicated with each other; The push rod (510) is threadedly connected to the hole wall of the first through hole (310); The base (520) and the sealing valve (200) slide in the second through hole (320).

4. The valve structure according to claim 3, characterized in that: The aperture of the first through hole (310) is smaller than the aperture of the second through hole (320), so that a step surface is formed at the connection between the first through hole (310) and the second through hole (320), and the step surface is used to abut against the base (520) to prevent the base (520) and the temperature sensing element (400) from sliding out of the mounting shell (300).

5. The valve structure according to claim 2, characterized in that: A first clamping groove (521) opening toward the temperature sensing element (400) is provided on a side of the base (520) away from the push rod (510); The sealing valve (200) is provided with a second clamping groove (231) opening toward the temperature sensing element (400); Two ends of the temperature sensing element (400) extend into the first clamping groove (521) and the second clamping groove (231) respectively.

6. The valve structure according to claim 5, characterized in that: A first buffer pad (522) is arranged in the first clamping groove (521), a second buffer pad (232) is arranged in the second clamping groove (231), and two ends of the temperature sensing element (400) are respectively in contact with the first buffer pad (522) and the second buffer pad (232).

7. The valve structure according to claim 1, characterized in that: The sealing valve (200) comprises a first valve segment (210), a second valve segment (220) and a third valve segment (230) which are connected in sequence; The valve body (100) has a first sealing hole (110) communicating with the discharge channel (140); a conical sealing surface formed at the end of the first valve section (210) extends into the first sealing hole (110) to block the discharge channel (140); The third valve section (230) extends into the installation shell (300), and the outer surface of the third valve section (230) is recessed in the radial direction to form a waterproof installation groove, and the waterproof installation groove is used to install a waterproof ring (233), and the waterproof ring (233) is connected to the inner wall of the installation shell (300) by interference fit; The outer diameter of the first valve segment (210) is smaller than the outer diameter of the second valve segment (220); The outer diameter of the second valve segment (220) is smaller than the outer diameter of the third valve segment (230).

8. The valve structure according to claim 7, characterized in that: The valve structure further comprises a blocking ring (600) and a sealing ring (700); The outer surface of the first valve section (210) is recessed in a radial direction to form a sealing installation groove (211), the blocking ring (600) and the sealing ring (700) are both arranged in the sealing installation groove (211), and the blocking ring (600) is located on a side of the sealing ring (700) away from an end face of the sealing ring (700) subjected to medium force.

9. The valve structure according to claim 8, characterized in that: The bottom of the sealing installation groove (211) has a sealing slope (212), and the inner ring of the blocking ring (600) has a blocking ring slope (610). When the first valve section (210) is subjected to a medium force, the sealing ring (700) pushes the blocking ring (600) to make the blocking ring slope (610) move along the sealing slope (212) until the blocking ring slope (610) fits with the sealing slope (212), and the outer circumference of the blocking ring (600) fits with the inner wall of the valve housing to prevent the sealing ring (700) from being squeezed out.

10. The valve structure according to claim 7, characterized in that: The valve structure further comprises an elastic member (800); The elastic member (800) is sleeved on the second valve section (220); The valve body (100) has a second sealing hole (120) connected to the first sealing hole (110), the first sealing hole (110) and the second sealing hole (120) are coaxially arranged, and the aperture of the second sealing hole (120) is larger than the aperture of the first sealing hole (110), and a connecting surface is formed at the connection between the first sealing hole (110) and the second sealing hole (120), one end of the elastic member (800) abuts against the connecting surface, and the other end of the elastic member (800) abuts against the third valve section (230), and the elastic member (800) is configured to enable the sealing valve (200) to have a movement tendency toward moving closer to the pushing assembly (500).

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