Large-flow safety valve

Abstract

The utility model provides a large-flow safety valve which comprises a valve body with two through ends, a valve seat is arranged on the inner side of the first end of the valve body, a plug used for introducing gas into the valve body is arranged at the second end of the valve body, a plug cap is arranged on the outer side of the plug, a liquid drainage hole is formed in the side face of the valve body, a valve element is arranged in the valve body, and the valve element is arranged in the valve body. The space between the valve element and the plug is filled with gas to drive the valve element to move, and therefore the liquid drainage hole is opened or closed. According to the embodiment of the utility model, the adjustment of liquid feeding and discharging under the working condition of high flow can be realized, high-pressure gas is used for replacing an elastic element, the conical surface sealing position of the valve port can be uniformly stressed, and the conditions of high spring processing difficulty and fatigue fracture of the spring after multiple times of opening in the use of the traditional spring can be avoided; therefore, the safety and the reliability of a hydraulic system using the safety valve are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of valve devices, and more specifically, to a high-flow-rate safety valve. Background Technology

[0002] A safety valve is an overpressure protection device in a hydraulic system. When the pressure before the valve exceeds its predetermined opening pressure, the safety valve opens to release pressure, thereby reducing the pressure in the hydraulic system. Common safety valve structures are as follows: Figure 1 As shown, the safety valve includes a valve body 30, within which a movable valve core 20 is disposed. A spring 10 is connected to the end of the valve core 20, and the opening pressure of the valve core 20 is controlled by adjusting the preload of the spring 10. Specifically, when the pressure at the inlet of the valve body 30 reaches a predetermined opening pressure, the valve core 20 is pushed open by the pressure at the inlet to release pressure, and the liquid is discharged to the atmosphere through the drain hole of the valve body 30.

[0003] However, current high-flow safety valves have the following technical drawbacks:

[0004] Firstly, a high pressure increment is required when the valve is fully open. Specifically, with a fixed inlet pressure, the flow rate of the safety valve is mainly determined by the valve core opening degree; the larger the valve core opening, the greater the flow rate through the safety valve. However, since the valve core's opening power is entirely provided by the inlet pressure, a certain pressure increment is needed from the valve core opening overflow to the point where the valve core is fully open and meets the nominal flow rate requirement. If the valve is fully open, the pressure will be too high, increasing the hydraulic pressure on the safety valve and the hydraulic system it is in, which is detrimental to the safety of the hydraulic system.

[0005] Figure 1 The existing safety valve shown has no throttling or pressure-holding function because the drain hole on the valve body 3 is fully open before the valve core 20 opens. Therefore, when the valve core 20 opens and overflows, the high-pressure liquid reaches the chamber 30A of the valve body 30, where the pressure is close to atmospheric pressure and essentially drops to zero. Consequently, during the opening process, the area of ​​the valve core 20 pushed by the high-pressure liquid is the same as the channel area of ​​the valve seat of the valve body 30, resulting in a small area that is significantly smaller than the mating diameter between the valve core 3 and the valve body 30. Simultaneously, the opening force on the valve core 20 is the product of the high-pressure liquid pressure and the area of ​​the high-pressure liquid's action. Therefore, a higher inlet liquid pressure is required to increase the valve core opening and thus increase the safety valve flow rate. This increases the overshoot pressure of the safety valve, which is detrimental to the safety of the hydraulic system.

[0006] Secondly, the conical seal at the valve port experiences uneven spring pressure, resulting in an unreliable seal. Specifically, for example… Figure 1When the spring 10 is compressed and deformed, it will not only generate axial elastic force on the valve core 20, but also radial torsional force on the valve core 20, resulting in uneven stress on the conical sealing position of the valve port. When the valve core 20 is opened and closed repeatedly under high pressure and high flow conditions, the conical seal will wear due to uneven stress, reducing sealing reliability.

[0007] Thirdly, the springs are difficult to manufacture and have a short lifespan. Specifically, the sealing diameter of the passage in a high-flow safety valve is generally large, which requires a large spring preload, making the spring difficult to manufacture. At the same time, the spring steel wire is subjected to great stress during operation, reducing the spring's durability. Utility Model Content

[0008] To address the problems in existing technologies, such as the high increase in inlet pressure required when the valve is fully open, uneven spring pressure on the conical seal of the valve port, and the difficulty in processing and short lifespan of the spring, this utility model provides a high-flow safety valve.

[0009] In view of this, this utility model embodiment provides a high-flow safety valve, including a valve body that extends through both ends. A valve seat is provided on the inner side of the first end of the valve body, and a plug for introducing gas into the valve body is provided on the second end of the valve body. A plug cap is provided on the outer side of the plug, and a drain hole is provided on the side of the valve body. A valve core is provided in the valve body, and gas is filled between the valve core and the plug to drive the movement of the valve core, thereby opening or closing the drain hole.

[0010] In some embodiments, the plug includes a partition, a first recess is provided on a first side of the partition near the valve seat, an inflation rod is provided in the first recess, and a through hole is provided on the partition to connect the first recess and an external air source. The inflation rod is movable in the first recess along the extension direction of the valve body.

[0011] In some embodiments, the inflation rod includes a main body and an air inlet, the outer diameter of the main body is larger than the outer diameter of the air inlet and larger than the inner diameter of the gas chamber of the valve body, and the axial length of the main body is smaller than the depth of the first recess.

[0012] In some embodiments, the end of the air intake portion is provided with a first air intake channel and a second air intake channel. The first air intake channel is aligned with the extension direction of the valve body. One end of the first air intake channel is disposed on the end face of the air intake portion, and the other end is connected to one end of the second air intake channel. The second air intake channel is perpendicular to the extension direction of the valve body. The other end of the second air intake channel is disposed on the side of the air intake portion and can be closed through the inner surface of the through hole.

[0013] In some embodiments, an air intake seal is provided between the end face of the main body and the surface of the partition, and a sealing cavity is formed between the end face of the main body and the surface of the partition. A third air intake channel is provided on the main body, and the extension direction of the third air intake channel is consistent with the extension direction of the valve body. One end of the third air intake channel is connected to the sealing cavity, and the other end is provided on the end face of the main body and is connected to the gas cavity of the valve body.

[0014] In some embodiments, a second recess is provided on the second side of the partition away from the valve seat, and the plug is disposed in the second recess.

[0015] In some embodiments, the diameter of the valve core that mates with the valve body is larger than the outer diameter of the inlet channel of the valve seat.

[0016] In some embodiments, a spring is provided in the gas chamber of the valve body to increase the elastic force driving the valve core to move.

[0017] In some embodiments, the valve core moves between the valve seat and the plug, and the contact surface between the valve core and the valve seat is a conical surface or a rounded surface.

[0018] In some embodiments, a liquid inlet is provided at the first end of the valve body, and the valve seat includes a first part near the liquid inlet and a second part away from the liquid inlet. The outer diameter of the first part is larger than the outer diameter of the second part. A first step is provided on the inner surface of the first end of the valve body. The valve seat is positioned by the abutting engagement of the first part and the first step. The outer surface of the first part and the inner surface of the valve body are connected by a thread. A valve seat seal is provided between the outer surface of the second part and the inner surface of the valve body. A second step is provided on the inner surface of the valve body to limit the position of the plug.

[0019] This utility model embodiment can achieve the regulation of fluid inlet and outlet under high flow conditions. By using high-pressure gas to replace elastic elements, the force on the conical sealing position of the valve port can be uniform. It can also avoid the problems of traditional springs, such as the difficulty in spring processing and spring fatigue breakage after repeated opening, thereby improving the safety and reliability of the hydraulic system used by the safety valve.

[0020] To make the above-mentioned objects, features and advantages of the present utility model embodiments more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to illustrate the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method. The accompanying drawings, which are provided to further understand the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of an existing high-flow safety valve;

[0023] Figure 2 This is a schematic diagram of the structure of the high-flow safety valve provided in the embodiment of this utility model;

[0024] Figure 3 This is a partial structural schematic diagram of the high-flow safety valve provided in the embodiment of this utility model.

[0025] Among them, the above-mentioned appendix Figure 2 and Figure 3 The following reference numerals are included:

[0026] 1-Valve seat; 11-First part; 12-Second part; 2-Valve body; 2a-First end; 2b-Second end; 21-Flow channel through hole; 22-Liquid inlet; 23-First step; 24-Valve seat seal; 25-Drain hole; 26-Second step; 3-Valve core; 4-Inflating rod; 41-Main body; 411-Third air inlet channel; 42-Air inlet; 421-First air inlet channel; 422-Second air inlet channel; 5-Plug; 51-Separation part; 52-First recess; 53-Second recess; 54-Through hole; 55-Air inlet seal; 56-Sealing cavity; 6-Plug cap. Detailed Implementation

[0027] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of the present invention.

[0028] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0029] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0030] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0031] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0032] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0033] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0036] This utility model provides a high-flow-rate safety valve that solves the technical problems of excessively high opening pressure, unreliable conical seal, and poor spring durability in existing high-flow-rate safety valves, thereby improving the safety and reliability of the hydraulic system in which the safety valve is used. Figure 2 and Figure 3 As shown, the high-flow safety valve includes a valve body 2, which has a flow channel through hole 21. The valve body 2 forms a through structure with openings at both ends based on the flow channel through hole 21. The first end 2a of the valve body 2 is a liquid inlet 22. A valve seat 1 is provided on the inner side of the first end 2a of the valve body 2. External liquid enters into the valve seat 1 through the liquid inlet 22.

[0037] Preferably, the valve seat 1 includes a first part 11 near the liquid inlet 21 and a second part 12 away from the liquid inlet 11. The outer diameter of the first part 11 is larger than the outer diameter of the second part 12. To accommodate the structure of the valve seat 1, a first step 23 is provided on the inner surface of the first end of the valve body 2. The valve seat 1 is snapped and positioned inside the first end 2a of the valve body 2 by the abutting engagement of the first part 11 and the first step 23. Preferably, the outer surface of the first part 11 and the inner surface of the valve body 2 are connected by threads. A valve seat seal 24 is provided between the outer surface of the second part 12 and the inner surface of the valve body 2 to achieve a seal between the valve seat 1 and the valve body 2.

[0038] Furthermore, a movable valve core 3 is provided inside the valve body 2, and a drain hole 25 is provided on the side of the valve body 2. The valve core 3 can reciprocate within the valve body 2 along the extending direction of the flow passage 21 and open or close the drain hole 25 during the movement. Here, the diameter of the valve core 3 that mates with the valve body 2 is larger than the outer diameter of the inlet channel of the valve seat 1.

[0039] The contact surface between the valve core 3 and the end of the valve seat 1 is conical. A conical seal is formed between the end of the valve seat 1 and the contact surface of the valve core 3, forming a cavity A. The valve core 3 moves particularly between the end of the valve seat 1 and the second end 2b of the valve body 2. Of course, the contact surface can also be a rounded surface or other shapes suitable for sealing.

[0040] Furthermore, a plug 5 is provided at the second end 2b of the valve body 2. This plug 5 can be connected to the valve body 2 via fasteners, for example. The plug 5 is used to seal the second end 2b of the valve body 2 after high-pressure gas is introduced into it. A gas cavity is formed between the valve core 3 and the plug 5 to be filled with high-pressure gas used to regulate the movement of the valve core 3. A cap 6 is provided on the side of the plug 5 away from the valve seat 1. This cap 6 is connected to the plug 5 via threads, for example. When the valve body 2 is filled with high-pressure gas, the cap 6 can completely seal the valve body 2, ensuring a high-pressure environment within the valve body 2. When pressure needs to be increased or decreased, for example, the cap 6 can be removed from the plug 5.

[0041] Furthermore, a second step 26 is provided on the inner surface of the valve body 2. The second step 26 is used to restrict the position of the plug 5 so that the plug 5 is fixed to the second end 2b of the valve body 2.

[0042] Specifically, when external liquid enters the valve seat 1 through the inlet 22, the pressure of the liquid can push the valve core 3 to move away from the valve seat 1 to open the drain hole 25. Alternatively, the pressure of the high-pressure gas filling between the valve core 3 and the plug 5 can push the valve core 3 to move closer to the valve seat 1 to close the drain hole 25. Thus, the movement of the valve core 3 opens or closes the drain hole 25.

[0043] In this embodiment, the outer surface of the valve core 3 is tightly fitted with the inner surface of the valve seat 1, thereby achieving a sealing function. Of course, a valve core sealing element can also be provided to achieve a seal. In addition, the contact position between the valve core 3 and the drain hole 25 of the valve body 2 is a clearance fit structure.

[0044] Furthermore, an inflation rod 4 is provided on the first side of the plug 5 near the valve seat 1. This inflation rod 4 assists in pressurizing or depressurizing within the valve body 2. For example, during pressurization, after removing the plug cap 6, when an external air source introduces high-pressure gas into the gas chamber of the valve body 2 through the plug 5, the inflation rod 4 is first driven to move towards the valve seat 1. This movement of the inflation rod 4 connects the external air source with the gas chamber of the valve body 2, thereby pressurizing the gas chamber and ensuring a high-pressure environment within it, preventing leakage. Similarly, during depressurization, after removing the plug cap 6, the movement of the inflation rod 4, controlled by an external device, causes the high-pressure gas in the gas chamber to flow out from the plug 5.

[0045] Furthermore, in order to realize the inflation rod 4 on one side of the plug 5, the plug 5 includes a partition 51. A first recess 52 is provided on the first side of the partition 51 near the valve seat 1, and a second recess 53 is provided on the second side of the partition 51 away from the valve seat 1. The inflation rod 4 is disposed in the first recess 52, and the nut 6 is disposed in the second recess 53. A through hole 54 is provided on the partition 51, which can connect the first recess 52 and the second recess 53. The inflation rod 4 can reciprocate within the first recess 52 along the extension direction of the valve body 2.

[0046] Specifically, the inflatable top rod 4 includes a main body 41 and an air inlet 42. The outer diameter of the main body 41 is larger than the outer diameter of the air inlet 42. Here, the outer diameter of the main body 41 matches the inner diameter of the first recess 51, and the outer diameter of the air inlet 42 matches the inner diameter of the through hole 53. This allows the main body 41 to be disposed in the first recess 52, and the air inlet 42 to extend into the second recess 53 through the through hole 53.

[0047] Furthermore, the outer diameter of the main body 41 is larger than the inner diameter of the flow channel through hole 11, and the axial length of the main body 41 is smaller than the depth of the first recess 52, so that the inflation rod 4 can not only be confined within the first recess 52 but also reciprocate within the first recess 52.

[0048] The air intake section 42 is provided with a first air intake channel 421 and a second air intake channel 422 at its end. The first air intake channel 421 extends in the same direction as the valve body 2. One end of the first air intake channel 421 is located on the end face of the air intake section 42, and the other end is connected to one end of the second air intake channel 422. The second air intake channel 422 is perpendicular to the extension direction of the valve body 2. The other end of the second air intake channel 422 is located on the side of the air intake section 42 and can be closed through the inner surface of the through hole 54.

[0049] Furthermore, an air inlet seal 55 is provided between the end face of the main body 41 and the surface of the partition 51, and a sealing cavity 56 is formed between the end face of the main body 41 and the surface of the partition 51, thereby isolating the gas cavity of the valve body 2 from the external air source.

[0050] Furthermore, a third air intake channel 411 is provided on the main body 41. The extension direction of the third air intake channel 411 is consistent with the extension direction of the valve body 2. One end of the third air intake channel 411 is connected to the sealing cavity 56, and the other end is provided on the end face of the main body 41 and is connected to the gas cavity of the valve body 2.

[0051] In this embodiment, the plug 6 is first opened so that the high-pressure gas supplied by the external gas source can enter the air intake 42 of the inflation rod 4 through the plug 5. By pushing the air intake 42 toward the valve seat 1, the second air intake channel 422 is no longer closed, but is connected to the sealing cavity 56. In this way, the high-pressure gas enters the second air intake channel 422 from the first air intake channel 421, then enters the third air intake channel 411 through the sealing cavity 56, and finally enters the gas chamber of the valve body 2, so that the gas chamber is filled with high-pressure gas. Finally, the plug 6 is installed.

[0052] When external liquid enters the valve seat 1 through the inlet 22, the inlet pressure is greater than the opening pressure of the valve core 3, thus pushing the valve core 3 to move away from the valve seat 1. When the movement of the valve core 3 causes the drain hole 25 to fully open, the pressure in the gas chamber will continuously increase, and the valve core 3 will move closer to the inflation rod 4. When the inlet pressure decreases, the high pressure in the gas chamber reverses the pressure, driving the valve core 3 to move towards the valve seat 1, thereby gradually closing the drain hole 25.

[0053] Using high-pressure gas instead of elastic elements in the above process ensures uniform force distribution at the conical sealing surface of the valve port, preventing the spring from exerting radial torsional force on the valve core 3 and improving the reliability of the valve port seal. Furthermore, using high-pressure gas instead of elastic elements also avoids the problems associated with traditional springs, such as difficult manufacturing and fatigue breakage after repeated opening and closing.

[0054] Of course, under the premise of using high-pressure gas, a spring can also be installed in the gas chamber of the valve body 2. By installing the spring, the elastic force of the valve core 3 can be increased, so that the valve core 3 moves faster.

[0055] Based on this embodiment, large-flow inlet and outlet liquid regulation can be achieved. When the valve core 3 is in the closed state, the outlet hole 25 on the valve body 2 is blocked and closed by the valve core 3. When the valve core 3 is gradually opened under the pressure of the inlet port 22, the inlet port pressure is greater than the opening pressure of the valve core 3, thereby pushing the valve core 3 to move away from the valve seat 1, thus causing the outlet hole 25 on the valve body 2 to gradually open. The gradual opening of the outlet hole 25 on the valve body 2 has a throttling and pressure-maintaining effect compared to directly and completely opening the outlet hole 25. Therefore, when the high-pressure liquid flows through the valve seat 1 and reaches the cavity A in the valve body 2, the liquid pressure from the inlet port 22 increases the opening force on the valve core 3, thereby increasing the opening degree of the valve core 3 and significantly increasing the liquid flow rate through the large-flow safety valve. When pressure relief is needed, simply open the plug cap 6 and the high-pressure gas in the gas chamber can be relieved through the cooperation of the plug 5 and the inflation rod 4.

[0056] The embodiments disclosed herein can achieve regulation of fluid inlet and outlet under high flow conditions. By using high-pressure gas instead of elastic elements, the force on the conical sealing position of the valve port can be uniform. It can also avoid the problems of traditional springs, such as the difficulty in spring processing and spring fatigue breakage after repeated opening, thereby improving the safety and reliability of the hydraulic system used by the safety valve.

[0057] In the above embodiments of this utility model, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0058] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0059] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0060] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0061] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-flow-rate safety valve, characterized in that, The valve includes a valve body that extends through both ends. A valve seat is provided on the inner side of the first end of the valve body, and a plug for introducing gas into the valve body is provided on the second end of the valve body. A plug cap is provided on the outer side of the plug, and a drain hole is provided on the side of the valve body. A valve core is provided inside the valve body, and gas is filled between the valve core and the plug to drive the movement of the valve core, thereby opening or closing the drain hole.

2. The high-flow-rate safety valve according to claim 1, characterized in that, The plug includes a partition, a first recess is provided on the first side of the partition near the valve seat, an inflation rod is provided in the first recess, and a through hole is provided on the partition to connect the first recess and an external air source. The inflation rod can move in the first recess along the extension direction of the valve body.

3. The high-flow-rate safety valve according to claim 2, characterized in that, The inflation rod includes a main body and an air inlet. The outer diameter of the main body is larger than the outer diameter of the air inlet and larger than the inner diameter of the gas chamber of the valve body. The axial length of the main body is smaller than the depth of the first recess.

4. The high-flow-rate safety valve according to claim 3, characterized in that, The air intake section is provided with a first air intake channel and a second air intake channel at its end. The first air intake channel is aligned with the extension direction of the valve body. One end of the first air intake channel is located on the end face of the air intake section, and the other end is connected to one end of the second air intake channel. The second air intake channel is perpendicular to the extension direction of the valve body. The other end of the second air intake channel is located on the side of the air intake section and can be closed through the inner surface of the through hole.

5. The high-flow-rate safety valve according to claim 4, characterized in that, An air intake seal is provided between the end face of the main body and the surface of the partition, forming a sealing cavity between the end face of the main body and the surface of the partition. A third air intake channel is provided on the main body, and the extension direction of the third air intake channel is consistent with the extension direction of the valve body. One end of the third air intake channel is connected to the sealing cavity, and the other end is provided on the end face of the main body and is connected to the gas cavity of the valve body.

6. The high-flow-rate safety valve according to claim 2, characterized in that, A second recess is provided on the second side of the partition away from the valve seat, and the plug is disposed in the second recess.

7. The high-flow-rate safety valve according to claim 1, characterized in that, The diameter of the valve core that mates with the valve body is larger than the outer diameter of the liquid inlet channel of the valve seat.

8. The high-flow-rate safety valve according to claim 1, characterized in that, A spring is installed inside the gas chamber of the valve body to increase the elastic force driving the valve core to move.

9. The high-flow-rate safety valve according to claim 1, characterized in that, The valve core moves between the valve seat and the plug, and the contact surface between the valve core and the valve seat is a conical surface or a rounded surface.

10. The high-flow-rate safety valve according to claim 1, characterized in that, The valve body has a liquid inlet at its first end. The valve seat includes a first part near the liquid inlet and a second part away from the liquid inlet. The outer diameter of the first part is larger than the outer diameter of the second part. A first step is provided on the inner surface of the first end of the valve body. The valve seat is positioned by the abutting cooperation between the first part and the first step. The outer surface of the first part and the inner surface of the valve body are connected by threads. A valve seat seal is provided between the outer surface of the second part and the inner surface of the valve body. A second step is provided on the inner surface of the valve body to limit the position of the plug.

Images