Vertical exhaust valve

Abstract

The utility model relates to the technical field of valves, and discloses a vertical exhaust valve which comprises a valve body, a valve seat, a float bowl and a valve needle assembly, an exhaust port is formed in the top end of the valve body, and a water inlet is formed in the bottom end of the valve body; the valve seat is arranged in the exhaust port in a penetrating manner and is sealed with the inner wall of the exhaust port; the float bowl is located in the valve body and can move in the valve body in the vertical direction, the float bowl is provided with a through hole, the through hole is communicated with the water inlet and the exhaust port, and a part of the structure of the valve seat extends into the through hole; the valve needle assembly is arranged in the through hole, the floating cylinder can abut against the valve needle assembly, the valve needle assembly is elastically connected with the valve seat through an elastic element, the valve needle assembly can block or open the center through hole of the valve seat, the floating cylinder can abut against the valve needle assembly when descending so that the valve needle assembly can incline, and the valve needle assembly opens the center through hole. When the water level drops, the central through hole is obliquely and laterally opened through the valve needle assembly, force needed for opening and closing the valve needle assembly is small, exhaust is more flexible, and the service life of the elastic element is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a vertical exhaust valve. Background Art

[0002] The principle adopted by the exhaust valve is mainly that when there is gas overflow in the system, the gas will climb up along the pipeline and finally gather at the highest point of the system. And the exhaust valve is generally installed at the highest point of the system. When the gas enters the valve cavity of the exhaust valve and gathers at the upper part of the exhaust valve, as the gas in the valve increases, the pressure rises. When the gas pressure is greater than the system pressure, the gas will cause the water surface in the cavity to drop, and the floating cylinder will drop along with the water level, opening the exhaust port; when the gas is discharged, the water level rises, and the floating cylinder also rises accordingly, closing the exhaust port.

[0003] The vertical exhaust valve in the prior art is a commonly used exhaust valve. A valve seat, a valve needle and a floating cylinder are arranged in the valve body of the vertical exhaust valve. The valve seat is arranged in the exhaust hole of the valve body, the floating cylinder is arranged in the valve body, the valve needle is arranged in the floating cylinder and is connected with the floating cylinder, and the valve needle and the valve seat are elastically connected through an elastic element. When the gas pressure is greater than the system pressure, the water level drops, and the floating cylinder drives the valve needle to move downward along the vertical direction to open the exhaust valve for exhaust. The force required for opening and closing the vertical exhaust valve is relatively large, and it is necessary to overcome the elastic force of the elastic element, and the deformation of the elastic element is relatively large, reducing the service life of the elastic element. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a vertical exhaust valve, which solves the technical problems that the force required for opening and closing the valve needle in the prior art is relatively large, and the deformation of the elastic element is relatively large, reducing the service life of the elastic element.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a vertical exhaust valve, comprising:

[0007] A valve body, the top of which is provided with an exhaust port, and the bottom of which is provided with a water inlet;

[0008] A valve seat, which is inserted into the exhaust port and is sealed with the inner wall of the exhaust port;

[0009] A floating cylinder, the floating cylinder is located in the valve body and can float in the valve body along the vertical direction. The floating cylinder is provided with a through hole, the through hole is communicated with the water inlet and the exhaust port, and a part of the structure of the valve seat extends into the through hole;

[0010] The valve needle assembly is arranged in the through hole. The float can abut against the valve needle assembly. The valve needle assembly is elastically connected to the valve seat through an elastic element. The valve needle assembly can block or open the central through hole of the valve seat. When the float descends, it can abut against the valve needle assembly to make the valve needle assembly tilt, and the valve needle assembly opens the central through hole.

[0011] In the valve body of the vertical exhaust valve, there are a valve seat, a float and a valve needle assembly. The float floats vertically in the valve body. The valve needle assembly is arranged in the through hole of the float. The valve needle assembly is elastically connected to the valve seat through an elastic element. The valve needle assembly can block or open the central through hole of the valve seat. When the float descends, it can abut against the valve needle assembly to make the valve needle assembly tilt, so as to open the central through hole. When the vertical exhaust valve is in use, when the water level drops, the central through hole is opened laterally by the tilt of the valve needle assembly. The force required for the opening and closing of the valve needle assembly is relatively small, the exhaust is more flexible, and the service life of the elastic element is prolonged.

[0012] As a preferred solution of the above vertical exhaust valve, a convex structure is arranged in the through hole. When the float descends, the convex structure abuts against the valve needle assembly to make the valve needle assembly tilt, and the valve needle assembly opens the central through hole.

[0013] The arrangement of the convex structure can make the valve needle assembly tilt by the float abutting against the valve needle assembly as the water level drops, so as to open the central through hole of the valve seat.

[0014] As a preferred solution of the above vertical exhaust valve, the float includes an upper float and a lower float. There is a gap between the upper float and the lower float, and the upper float and the lower float are connected by a connecting structure. The through hole includes a first through hole arranged in the upper float and a second through hole arranged in the lower float. A part of the structure of the valve seat extends into the first through hole, and the second through hole is communicated with the water inlet;

[0015] The valve needle assembly is located in the gap, and a part of the structure of the valve needle assembly extends into the first through hole. The convex structure is arranged at the bottom of the first through hole.

[0016] The structure of this float is designed quite ingeniously. When the water level rises, the float will not affect the valve needle assembly from blocking the central through hole of the valve seat; when the water level drops, the valve needle assembly is tilted laterally by the convex structure abutting against the valve needle assembly to open the central through hole of the valve seat.

[0017] As a preferred solution of the above vertical exhaust valve, the valve needle assembly includes:

[0018] A valve needle, the top of which extends into the first through hole and is connected to the valve seat through the elastic element;

[0019] A plug, which is installed on the valve needle and can block the central through-hole;

[0020] A holding member, which is installed at the bottom end of the valve needle. The convex structure can abut against the holding member to incline the valve needle.

[0021] The valve needle assembly includes a valve needle, a plug and a holding member. The valve needle serves as a supporting structure for the plug and the holding member. The plug is used to block the central through-hole of the valve seat. The holding member can cooperate with the convex structure to incline the valve needle to open the central through-hole. The structure of this valve needle assembly is simple and easy to manufacture.

[0022] As a preferred solution of the above vertical exhaust valve, the holding member is in a frustum structure, the diameter of the frustum structure gradually increases from top to bottom, and the convex structure can abut against the side wall of the frustum structure.

[0023] The convex structure can abut against the side wall of the frustum structure. The diameter of the frustum structure gradually increases from top to bottom. During the descending process of the float, the side wall of the frustum structure is pressed, so that the frustum structure inclines smoothly.

[0024] As a preferred solution of the above vertical exhaust valve, the first through-hole includes: a guiding hole and a penetrating hole. The guiding hole and the penetrating hole are communicated. The penetrating hole is located between the guiding hole and the second through-hole. A guiding structure is arranged at the top of the valve body, and the guiding structure extends into the guiding hole and is in guiding cooperation with the guiding hole;

[0025] Part of the structures of the valve seat and the valve needle assembly extend into the penetrating hole.

[0026] The cooperation between the guiding hole and the guiding structure can guide the lifting of the float and prevent the float from moving in the horizontal plane; the arrangement of the penetrating hole provides an installation space for the valve seat and the valve needle assembly.

[0027] As a preferred solution of the above vertical exhaust valve, the guiding structure is in a wedge shape, and the aperture of the guiding hole gradually decreases from top to bottom.

[0028] The wedge-shaped guiding structure can play a good guiding role in the lifting of the float and avoid the movement of the float in the horizontal direction.

[0029] As a preferred solution of the above vertical exhaust valve, the second through-hole is in an inverted conical structure, and the diameter of the end of the second through-hole close to the water inlet is greater than or equal to the inner diameter of the water inlet.

[0030] The above settings can prevent the floating cylinder from jumping or floating due to excessive gas flow rate or excessive pressure difference, enabling the vertical exhaust valve to exhaust smoothly and improving the reliability and stability of the vertical exhaust valve.

[0031] As a preferred solution of the above vertical exhaust valve, the convex structure is an arc-shaped structure arranged at the bottom end of the first through hole. The arc of the arc-shaped structure fits the inner wall of the first through hole, and the chord corresponding to the arc can abut against the valve needle assembly.

[0032] The convex structure is an arc-shaped structure arranged at the bottom of the first through hole, which has a simple structure and is convenient for preparation; moreover, it can also improve the structural stability of the floating cylinder.

[0033] As a preferred solution of the above vertical exhaust valve, a plurality of grooves are arranged on the outer periphery of the floating cylinder, and the grooves extend along the axial direction of the floating cylinder.

[0034] The arrangement of the grooves on the outer periphery of the floating cylinder can facilitate the upward flow of gas and enhance the upward fluidity of the gas.

[0035] Advantages of the present utility model:

[0036] The vertical exhaust valve proposed by the present utility model has a valve seat, a floating cylinder and a valve needle assembly arranged in the valve body of the vertical exhaust valve. The floating cylinder floats vertically in the valve body, the valve needle assembly is arranged in the through hole of the floating cylinder, the valve needle assembly is elastically connected with the valve seat through an elastic element, the valve needle assembly can block or open the central through hole of the valve seat, and when the floating cylinder descends, it can abut against the valve needle assembly to make the valve needle assembly tilt, so as to open the central through hole. When the vertical exhaust valve is in use, when the water level drops, the central through hole is opened laterally by the tilt of the valve needle assembly. The force required for the opening and closing of the valve needle assembly is relatively small, the exhaust is more flexible, and the service life of the elastic element is extended. Description of the drawings

[0037] Figure 1 is a schematic structural diagram of the vertical exhaust valve provided by the present utility model;

[0038] Figure 2 is Figure 1 a cross-sectional view of the vertical exhaust valve along the A-A direction;

[0039] Figure 3 is a cross-sectional view of the vertical exhaust valve provided by the present utility model when the valve needle is in an inclined state;

[0040] Figure 4 is a first schematic structural diagram of the floating cylinder provided by the present utility model;

[0041] Figure 5 is a second schematic structural diagram of the floating cylinder provided by the present utility model;

[0042] Figure 6 Yes Figure 5 Cross-sectional view of the floating cylinder along the B-B direction;

[0043] Figure 7 It is the third structural schematic diagram of the floating cylinder provided by the present utility model;

[0044] Figure 8 It is the fourth structural schematic diagram of the floating cylinder provided by the present utility model;

[0045] Figure 9 It is the fifth structural schematic diagram of the floating cylinder provided by the present utility model.

[0046] In the figure:

[0047] 1. Valve body; 11. Exhaust port; 12. Water inlet; 13. Valve bottom shell; 14. Valve cover; 141. Guide structure;

[0048] 2. Valve seat; 21. Central through hole;

[0049] 3. Floating cylinder; 30. Protrusion structure; 31. Through hole; 32. Upper floating cylinder; 321. First through hole; 3211. Guide hole; 3212. Penetrating hole; 33. Lower floating cylinder; 331. Second through hole; 34. Connection structure; 35. Groove; 36. Opening;

[0050] 4. Valve needle assembly; 41. Valve needle; 42. Plug; 43. Abuttment member;

[0051] 5. Elastic element;

[0052] 6. First sealing ring; 7. Second sealing ring. Detailed implementation manners

[0053] The following further elaborates the present utility model in detail in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0054] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0055] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0056] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0057] The vertical exhaust valve in the prior art is a commonly used exhaust valve. A valve seat, a valve needle and a float are arranged in the valve body of the vertical exhaust valve. The valve seat is arranged in the exhaust hole of the valve body, the float is arranged in the valve body, the valve needle is arranged in the float and is connected with the float. The valve needle and the valve seat are elastically connected through an elastic element. When the gas pressure is greater than the system pressure, the water level drops, and the float drives the valve needle to move downward in the vertical direction to open the exhaust valve for exhausting gas. The force required for opening and closing this vertical exhaust valve is relatively large, and it is necessary to overcome the elastic force of the elastic element, and the deformation of the elastic element is relatively large, reducing the service life of the elastic element.

[0058] To solve the above problems, as Figures 1 - 3 shown, this embodiment provides a vertical exhaust valve, which includes a valve body 1, a valve seat 2, a float 3 and a valve needle assembly 4. An exhaust port 11 is provided at the top end of the valve body 1, and a water inlet 12 is provided at the bottom end; the valve seat 2 is inserted into the exhaust port 11 and is sealed with the inner wall of the exhaust port 11; the float 3 is located in the valve body 1 and can float in the valve body 1 in the vertical direction. A through hole 31 is axially provided on the float 3, and the through hole 31 is communicated with the water inlet 12 and the exhaust port 11. A part of the structure of the valve seat 2 extends into the through hole 31; the valve needle assembly 4 is arranged in the through hole 31, the float 3 can abut against the valve needle assembly 4, the valve needle assembly 4 is elastically connected with the valve seat 2 through an elastic element 5, the valve needle assembly 4 can block or open the central through hole 21 of the valve seat 2, and when the float 3 descends, it can abut against the valve needle assembly 4 to make the valve needle assembly 4 tilt, and the valve needle assembly 4 opens the central through hole 21 (see Figure 3 ).

[0059] In the valve body 1 of the vertical exhaust valve, a valve seat 2, a floating cylinder 3, and a valve needle assembly 4 are provided. The floating cylinder 3 floats vertically within the valve body 1. The valve needle assembly 4 is disposed within the through-hole 31 of the floating cylinder 3. The valve needle assembly 4 is elastically connected to the valve seat 2 through an elastic element 5. In this embodiment, the elastic element 5 is a spring. The valve needle assembly 4 can block or open the central through-hole 21 of the valve seat 2. When the floating cylinder 3 descends, it can abut against the valve needle assembly 4 to tilt the valve needle assembly 4, thereby opening the central through-hole 21. When this vertical exhaust valve is in use, when the water level drops, the central through-hole 21 is opened laterally by tilting the valve needle assembly 4 without the need for the entire valve needle assembly 4 to move downward. The force required for the opening and closing of the valve needle assembly 4 is relatively small, the exhaust is more flexible, and the deformation of the elastic element 5 is smaller, extending the service life of the elastic element 5.

[0060] Specifically, as Figure 2 and Figure 3 shown, the valve body 1 includes a valve bottom shell 13 and a valve cover 14 installed at the upper end of the valve bottom shell 13. The bottom end of the valve bottom shell 13 is provided with a water inlet 12. The top end of the valve bottom shell 13 is open and is hermetically connected to the valve cover 14 through a first sealing ring 6. The top end of the valve cover 14 is provided with an exhaust port 11. The exhaust port 11 and the water inlet 12 are arranged vertically opposite to each other. The valve seat 2 is installed within the exhaust port 11. The valve seat 2 is hermetically connected to the exhaust port 11 through a second sealing ring 7. The valve seat 2 is axially provided with a through central through-hole 21. In this embodiment, the valve seat 2 is hermetically connected to the exhaust port 11 through two sets of second sealing rings 7 arranged vertically, enhancing the sealing effect. In other embodiments, the number of sets of the second sealing ring 7 is not limited to two, and can also be one set, three sets, or more sets.

[0061] As Figure 2 and Figure 3 shown, the floating cylinder 3 is floatingly arranged vertically within the cavity formed by the valve bottom shell 13 and the valve cover 14. As Figures 4 - 6 shown, the floating cylinder 3 includes an upper floating cylinder 32 and a lower floating cylinder 33. There is a gap between the upper floating cylinder 32 and the lower floating cylinder 33, and the upper floating cylinder 32 and the lower floating cylinder 33 are connected through a connecting structure 34. The through-hole 31 includes a first through-hole 321 provided on the upper floating cylinder 32 and a second through-hole 331 provided on the lower floating cylinder 33. A part of the structure of the valve seat 2 extends into the first through-hole 321, and the second through-hole 331 is connected to the water inlet 12; the valve needle assembly 4 is located in the gap, and a part of the structure of the valve needle assembly 4 extends into the first through-hole 321. In this embodiment, the two sides of the upper floating cylinder 32 and the lower floating cylinder 33 are respectively connected through the connecting structure 34 to form an integral structure, and two opposite openings 36 are formed between the two sets of connecting structures 34. The structural design of this floating cylinder 3 is relatively ingenious. When the water level rises, the floating cylinder 3 will not affect the valve needle assembly 4 from blocking the central through-hole 21 of the valve seat 2 (see Figure 2) When the water level drops, the buoy 3 abuts against the valve needle assembly 4, causing the valve needle assembly 4 to tilt laterally to open the central through hole 21 of the valve seat 2 (see Figure 3 ).

[0062] Furthermore, as Figure 6 shown, the first through hole 321 includes a guiding hole 3211 and a penetrating hole 3212. The guiding hole 3211 and the penetrating hole 3212 are in communication. The penetrating hole 3212 is located between the guiding hole 3211 and the second through hole 331. A guiding structure 141 is provided at the top of the valve body 1 (see Figure 2 ). The guiding structure 141 extends into the guiding hole 3211 and is in guiding cooperation with the guiding hole 3211; partial structures of the valve seat 2 and the valve needle assembly 4 extend into the penetrating hole 3212. The cooperation between the guiding hole 3211 and the guiding structure 141 can guide the lifting of the buoy 3 and prevent the buoy 3 from moving in the horizontal plane; the setting of the penetrating hole 3212 provides an installation space for the valve seat 2 and the valve needle assembly 4.

[0063] As Figure 2 shown, the guiding structure 141 is a wedge-shaped structure. As Figure 6 shown, the guiding hole 3211 is also a wedge-shaped structure, that is, the aperture of the guiding hole 3211 gradually decreases from top to bottom. The wedge-shaped guiding structure 141 can play a better guiding role in the lifting of the buoy 3 and avoid the movement of the buoy 3 in the horizontal direction.

[0064] Preferably, the second through hole 331 has an inverted conical structure, and the diameter of the end of the second through hole 331 close to the water inlet 12 is greater than or equal to the inner diameter of the water inlet 12. The above setting can prevent the buoy 3 from jumping or floating due to excessive gas flow rate or pressure difference, enabling the vertical exhaust valve to exhaust smoothly and improving the reliability and stability of the vertical exhaust valve.

[0065] As Figures 7 - 9 shown, a convex structure 30 is provided in the through hole 31. When the buoy 3 descends, it abuts against the valve needle assembly 4 through the convex structure 30 to tilt the valve needle assembly 4, and the valve needle assembly 4 opens the central through hole 21. In this embodiment, the convex structure 30 is an arc-shaped structure provided at the bottom end of the first through hole 321. The arc of the arc-shaped structure fits the inner wall of the first through hole 321, and the chord corresponding to the arc can abut against the valve needle assembly 4. The convex structure 30 is an arc-shaped structure provided at the bottom of the first through hole 321. This structure is simple and easy to prepare; moreover, it can also improve the structural stability of the buoy 3.

[0066] In other embodiments, the shape of the convex structure 30 is not limited to the bow-shaped structure, and it can also be other structures, as long as it can abut against the valve needle assembly 4 when the buoy 3 descends to tilt the valve needle assembly 4 to open the central through hole 21 of the valve seat 2. However, it should be noted that the convex structure 30 will not hinder the ascent of the buoy 3 when the buoy 3 ascends.

[0067] In this embodiment, the cavity of the valve body 1 is of a cylindrical structure, and the buoy 3 is adapted to the shape of the cavity. Preferably, a plurality of grooves 35 are provided on the outer periphery of the buoy 3, and the grooves 35 extend along the axial direction of the buoy 3. The provision of the grooves 35 on the outer periphery of the buoy 3 can facilitate the upward flow of gas and enhance the upward fluidity of the gas. In this embodiment, four grooves 35 are provided on the outer periphery of the buoy 3, and the four grooves 35 are arranged at equal intervals along the circumference of the buoy 3 to maintain the stability of the buoy 3. In other embodiments, the number of the grooves 35 is not limited to four, and it can also be one, two, three or more.

[0068] As Figure 2 shown, the valve needle assembly 4 includes a valve needle 41, a plug 42 and a holding member 43. The top end of the valve needle 41 extends into the first through hole 321 and is connected to the valve seat 2 through an elastic element 5; the plug 42 is installed on the valve needle 41, and the plug 42 can block the central through hole 21; the holding member 43 is installed at the bottom end of the valve needle 41, and the convex structure 30 can abut against the holding member 43 to tilt the valve needle 41. The valve needle assembly 4 includes a valve needle 41, a plug 42 and a holding member 43. The valve needle 41 serves as a supporting structure for the plug 42 and the holding member 43. The plug 42 is used to block the central through hole 21 of the valve seat 2, and the holding member 43 can cooperate with the convex structure 30 to tilt the valve needle 41 to open the central through hole 21. The structure of the valve needle assembly 4 is simple and easy to prepare.

[0069] Preferably, the holding member 43 is of a frustum structure, and the diameter of the frustum structure gradually increases from top to bottom. The convex structure 30 can abut against the side wall of the frustum structure. The convex structure 30 can abut against the side wall of the frustum structure. The diameter of the frustum structure gradually increases from top to bottom. When the buoy 3 descends, it presses against the side wall of the frustum structure to tilt the frustum structure smoothly and can ensure that the vertical exhaust valve opens better.

[0070] To realize the installation of the holding member 43 and the valve needle 41, in this embodiment, an external thread is provided on the circumference of the lower end of the valve needle 41, and the holding member 43 is of a nut structure. The nut structure is sleeved on the valve needle 41 and is threadedly connected to the valve needle 41. The holding member 43 is of a nut structure, and the installation and disassembly are relatively convenient.

[0071] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Vertical exhaust valve, characterized in that, Comprising: A valve body (1) having an exhaust port (11) provided at its top end and a water inlet (12) provided at its bottom end; A valve seat (2) inserted into the exhaust port (11) and sealed with the inner wall of the exhaust port (11); A float (3) located within the valve body (1) and capable of floating vertically within the valve body (1). The float (3) is provided with a through hole (31) which communicates with the water inlet (12) and the exhaust port (11). A part of the structure of the valve seat (2) extends into the through hole (31); A valve needle assembly (4) disposed within the through hole (31). The float (3) can abut against the valve needle assembly (4). The valve needle assembly (4) is elastically connected to the valve seat (2) through an elastic element (5). The valve needle assembly (4) can block or open the central through hole (21) of the valve seat (2). When the float (3) descends, it can abut against the valve needle assembly (4) to tilt the valve needle assembly (4), and the valve needle assembly (4) opens the central through hole (21).

2. The vertical exhaust valve according to claim 1, wherein A convex structure (30) is provided within the through hole (31). When the float (3) descends, the convex structure (30) abuts against the valve needle assembly (4) to tilt the valve needle assembly (4), and the valve needle assembly (4) opens the central through hole (21).

3. The vertical exhaust valve according to claim 2, wherein The float (3) includes an upper float (32) and a lower float (33). There is a gap between the upper float (32) and the lower float (33), and the upper float (32) and the lower float (33) are connected by a connecting structure (34). The through hole (31) includes a first through hole (321) provided in the upper float (32) and a second through hole (331) provided in the lower float (33). A part of the structure of the valve seat (2) extends into the first through hole (321), and the second through hole (331) communicates with the water inlet (12); The valve needle assembly (4) is located within the gap, and a part of the structure of the valve needle assembly (4) extends into the first through hole (321). The convex structure (30) is provided at the bottom of the first through hole (321).

4. The vertical exhaust valve according to claim 3, characterized in that, The valve needle assembly (4) includes: A valve needle (41) whose top end extends into the first through hole (321) and is connected to the valve seat (2) through the elastic element (5); A plug (42) installed on the valve needle (41), and the plug (42) can block the central through hole (21); A holding member (43) installed at the bottom end of the valve needle (41). The convex structure (30) can abut against the holding member (43) to tilt the valve needle (41).

5. The vertical exhaust valve according to claim 4, wherein The holding member (43) is in a frustum structure, and the diameter of the frustum structure gradually increases from top to bottom. The convex structure (30) can abut against the side wall of the frustum structure.

6. The vertical exhaust valve according to claim 3, characterized in that, The first through hole (321) includes a guiding hole (3211) and a penetrating hole (3212). The guiding hole (3211) communicates with the penetrating hole (3212). The penetrating hole (3212) is located between the guiding hole (3211) and the second through hole (331). A guiding structure (141) is provided at the top of the valve body (1). The guiding structure (141) extends into the guiding hole (3211) and is in guiding cooperation with the guiding hole (3211). Part of the structures of the valve seat (2) and the valve needle assembly (4) extend into the penetrating hole (3212).

7. The vertical exhaust valve according to claim 6, wherein The guiding structure (141) is a wedge-shaped structure, and the aperture of the guiding hole (3211) gradually decreases from top to bottom.

8. The vertical exhaust valve according to claim 3, characterized in that, The second through hole (331) is in an inverted conical structure, and the diameter of the end of the second through hole (331) close to the water inlet (12) is greater than or equal to the inner diameter of the water inlet (12).

9. The vertical exhaust valve according to claim 3, characterized in that, The convex structure (30) is an arcuate structure provided at the bottom end of the first through hole (321). The arc of the arcuate structure fits the inner wall of the first through hole (321), and the chord corresponding to the arc can abut against the valve needle assembly (4).

10. The vertical exhaust valve according to any one of claims 1-9, characterized in that, A plurality of grooves (35) are provided on the outer periphery of the float (3). The grooves (35) extend along the axial direction of the float (3).

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