Water-based overflow valve suitable for high-pressure large-flow working condition

Abstract

The utility model relates to the technical field of regulating valves, in particular to a water-based overflow valve suitable for high-pressure and large-flow working conditions. The water-based overflow valve comprises a valve body provided with a liquid inlet hole channel and a liquid return hole channel with the extending directions perpendicular to each other; the split type valve sleeve structure is mounted at the position where the liquid inlet hole channel is communicated with the liquid return hole channel; the valve element assembly is used for blocking the liquid inlet hole channel and the liquid return hole channel; the split type valve sleeve structure comprises a guide sleeve and a throttling seat, the guide sleeve and the throttling seat are embedded in the upper side wall and the lower side wall of the liquid return hole channel respectively, and the throttling seat is provided with a valve port communicating with the liquid inlet hole channel and the liquid return hole channel. The upper end of the valve element assembly is connected to the guide sleeve in a sliding and penetrating mode, the lower end of the valve element assembly abuts against and seals the valve port, when the pressure difference is larger than a set value, the lower end of the valve element assembly moves upwards and forms a throttling port with the valve port, and bubbles separated out of the throttling port can directly enter a liquid return hole channel through the split type valve sleeve structure.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, and in particular to a water-based overflow valve suitable for high-pressure and high-flow-rate operating conditions. Background Technology

[0002] In existing technologies, to address the cavitation effect caused by the high pressure difference before and after a liquid medium passes through a relief valve, the valve core is typically designed as a series-connected valve port structure. By cooperating with the valve sleeve to form a multi-stage throttling orifice, the pressure drop of the medium passing through the relief valve changes from a step-like drop to a more gradual transitional drop, thereby mitigating cavitation problems.

[0003] However, this structure can only mitigate the effects of cavitation, not completely eliminate its impact on the lifespan of the relief valve. In particular, when the relief valve operates under high pressure and high flow conditions, the number of bubbles precipitated at the throttling orifice increases, and these bubbles impact the valve sleeve, causing cavitation. Therefore, there is an urgent need for a relief valve that can effectively prevent cavitation. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes a water-based overflow valve suitable for high-pressure, high-flow-rate conditions, to address the problem that existing water-based overflow valves easily generate air bubbles at the throttling orifice under high-pressure, high-flow-rate conditions, and these bubbles impact the valve sleeve, causing cavitation.

[0005] This utility model provides a water-based overflow valve suitable for high pressure and high flow conditions. The water-based overflow valve includes: a valve body, which is provided with an inlet channel and a return channel that extend perpendicularly to each other.

[0006] The valve sleeve structure is split and installed at the position where the liquid inlet channel and the liquid return channel are connected;

[0007] A valve core assembly is used to block the inlet channel from the return channel;

[0008] The split valve sleeve structure includes a guide sleeve and a throttling seat respectively embedded in the upper and lower side walls of the return channel, and the throttling seat has a valve port that connects the inlet channel and the return channel.

[0009] The upper end of the valve core assembly slides through the guide sleeve, and the lower end of the valve core assembly abuts against and seals the valve port. When the pressure difference is greater than the set value, the lower end of the valve core assembly moves upward and forms a throttling orifice with the valve port.

[0010] According to the present invention, a water-based overflow valve suitable for high pressure and high flow conditions is provided, wherein from the return channel to the inlet channel, the cross-section of the valve port gradually decreases along the central axis of the inlet channel;

[0011] The valve core assembly comprises a valve rod provided with a conical end portion located at one end of the valve rod and abutting against the valve port, and the other end of the valve rod is in sliding connection with the guide sleeve.

[0012] According to the water-based overflow valve suitable for high-pressure large-flow working conditions provided by the utility model, along the central axis direction of the valve port, the side wall of the valve port is composed of a plurality of conical surfaces and cylindrical surfaces arranged alternately, and at least includes a first conical surface and a second conical surface with different cone angles.

[0013] The side wall of the conical end portion is correspondingly provided with two annular grooves for cooperating with the first conical surface and the second conical surface respectively to form a multi-stage throttling port with a step change in the flow area.

[0014] According to the water-based overflow valve suitable for high-pressure large-flow working conditions provided by the utility model, the cone angle of the first conical surface is smaller than the cone angle of the second conical surface.

[0015] According to the water-based overflow valve suitable for high-pressure large-flow working conditions provided by the utility model, the valve core assembly further comprises an elastic member arranged between the guide sleeve and the valve rod, for providing the required pre-tightening force for sealing the valve port and making the opening size of the throttling port positively related to the pressure of the liquid inlet channel.

[0016] According to the water-based overflow valve suitable for high-pressure large-flow working conditions provided by the utility model, the other end of the valve rod is provided with a mounting groove extending along the axial direction of the valve rod and having a slot opening formed in the middle of the end face of the valve rod, and the elastic member is partially embedded in the mounting groove.

[0017] According to the water-based overflow valve suitable for high-pressure large-flow working conditions provided by the utility model, further comprising a first sealing ring located between the throttling seat and the valve body.

[0018] The bottom surface of the throttling seat is provided with a circular annular first sealing groove, and the first sealing groove is arranged along the coincident central axis of the valve port, and the first sealing ring is embedded in the first sealing groove.

[0019] According to the water-based overflow valve suitable for high-pressure large-flow working conditions provided by the utility model, further comprising a second sealing ring located between the guide sleeve and the valve body.

[0020] The outer peripheral surface of the guide sleeve is provided with a circular annular second sealing groove, and the second sealing ring is embedded in the second sealing groove.

[0021] The utility model provides a water -based overflow valve suitable for high pressure big flow working condition still includes the third sealing ring between the valve stem with the guide bushing,

[0022] The outer circumferential surface of the valve stem is provided with a third sealing groove in the form of a ring, and the third sealing ring is embedded in the third sealing groove.

[0023] According to the water-based overflow valve suitable for high pressure big flow working condition provided by the utility model, the throttle seat is provided with screw holes penetrating through both ends of the outer periphery of the valve port, which are used for penetrating the screws connected with the valve body.

[0024] The above one or more technical solutions in the utility model have at least one of the following technical effects: the split type valve sleeve structure is arranged on the upper and lower side walls of the liquid return hole in a spaced manner between the guide bushing and the throttle seat, so that the bubbles separated between the valve core assembly and the throttle seat can directly enter the liquid return hole, thereby effectively avoiding bubble impact on the valve sleeve, preventing cavitation phenomenon, and greatly prolonging the service life of the water-based overflow valve.

[0025] In addition to the technical problems solved by the utility model, the technical features of the technical solutions and the advantages brought by the technical features, other technical features of the utility model and the advantages brought by the technical features will be further described with reference to the drawings, or understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or related technologies, the drawings needed in the embodiment or related technology description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0027] Figure 1 The structure schematic view of the water-based overflow valve provided by the utility model embodiment.

[0028] Figure 2 The cross-sectional view of the throttle seat provided by the utility model embodiment.

[0029] Figure 3 The cross-sectional view of the valve stem provided by the utility model embodiment.

[0030] Figure 4 The cross-sectional view of the guide bushing provided by the utility model embodiment.

[0031] REFERENCE SIGNS:

[0032] 100, valve body; 110, inlet hole; 120, return hole; 200, split valve sleeve structure; 210, guide sleeve; 211, second sealing groove; 220, throttling seat; 221, valve port; 221a, first conical surface; 221b, second conical surface; 222, first sealing groove; 223, screw hole; 300, valve core assembly; 310, valve rod; 311, conical end; 311a, annular groove; 312, mounting groove; 313, third sealing groove; 320, elastic member; 400, first sealing ring; 500, second sealing ring; 600, third sealing ring. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be clearly described below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0034] In the description of the embodiments of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0036] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature can be "above", "over" and "on" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature can be "under", "below" and "underneath" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not limited to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0038] To solve the problem that the valve sleeve of the water-based overflow valve is prone to cavitation, in the embodiments of the present application, a water-based overflow valve suitable for high-pressure and large-flow working conditions is introduced.

[0039] As shown in Figures 1 to 4 , the water-based overflow valve mainly comprises: a valve body 100, a split valve sleeve structure 200 and a valve core assembly 300.

[0040] The valve body 100 is provided with a liquid inlet channel 110 and a liquid return channel 120. The extension directions of the liquid inlet channel 110 and the liquid return channel 120 are perpendicular to each other. For example, the liquid inlet channel 110 is arranged in the vertical direction. The liquid return channel 120 is arranged in the horizontal direction.

[0041] The split valve sleeve structure 200 is installed at a position where the liquid inlet channel 110 and the liquid return channel 120 are in communication.

[0042] The valve core assembly 300 is slidably connected in the split valve sleeve structure 200, and is used to block the liquid inlet channel 110 and the liquid return channel 120.

[0043] In particular, the split valve sleeve structure 200 comprises a guide sleeve 210 and a throttling seat 220. The guide sleeve 210 and the throttling seat 220 are respectively embedded in the upper side wall and the lower side wall of the liquid return channel 120.

[0044] The throttle seat 220 is provided with a valve port 221 which communicates the liquid inlet channel 110 and the liquid return channel 120.

[0045] The upper end of the valve core assembly 300 is slidably connected to the guide sleeve 210. The lower end of the valve core assembly 300 abuts and seals the valve port 221. When the pressure difference is greater than a set value, the lower end of the valve core assembly 300 moves upward and forms a throttle port with the valve port 221.

[0046] Specifically, when the difference between the liquid pressure value in the liquid inlet channel 110 and the liquid pressure value in the liquid outlet channel is greater than a set value, the liquid pushes the valve core assembly 300 to move upward, so that a gap is formed between the valve core assembly 300 and the valve port 221, forming a throttle port for releasing liquid.

[0047] Further, the guide sleeve 210 is fixed to the valve body 100 by screws, which cooperates with the valve core assembly 300 to move up and down in the valve body 100. The throttle seat 220 is fixed to the valve body 100 by screws. The valve core assembly 300 has an initial position abutting the valve port 221 of the throttle seat 220. In addition, the valve core assembly 300 and the valve port 221 also have a pre-tightening force for sealing. When the pressure of the liquid in the liquid inlet channel 110 applied to the valve core assembly 300 exceeds the pre-tightening force, the valve core assembly 300 moves upward.

[0048] In this embodiment, the split valve sleeve structure 200 is arranged on the upper and lower side walls of the liquid return channel 120, so that the bubbles generated between the valve core assembly 300 and the throttle seat 220 can directly enter the liquid return channel 120, thereby effectively avoiding the impact of bubbles on the valve sleeve and preventing the occurrence of cavitation phenomenon, greatly prolonging the service life of the water-based overflow valve.

[0049] Based on the above embodiment, another embodiment of the utility model introduces a water-based overflow valve suitable for high-pressure and large-flow working conditions.

[0050] As shown in Figure 2 The valve port 221 is inverted conical. From the liquid return channel 120 to the liquid inlet channel 110, the cross section of the valve port 221 gradually decreases along the central axis direction of the liquid inlet channel 110.

[0051] The valve core assembly 300 includes a valve rod 310 provided with a conical end 311. The conical end 311 is located at one end of the valve rod 310. And the conical end 311 abuts the valve port 221. The other end of the valve rod 310 is slidably connected to the guide sleeve 210.

[0052] And, the taper angle of the conical end 311 is smaller than the taper angle of the side wall of the valve port 221. After being used for a period of time, the lowermost end of the conical end 311 sealingly abutting the valve port 221 is worn, and the part of the conical end 311 abutting the valve port 221 is moved downward to abut the side wall of the valve port 221, thereby ensuring good sealing performance for a long time.

[0053] Further, the side wall of the valve port 221 is composed of a plurality of taper surfaces and cylindrical surfaces arranged alternately along the central axis of the valve port 221.

[0054] And, the side wall of the valve port 221 includes at least a first taper surface 221a and a second taper surface 221b having different taper angles.

[0055] The side wall of the conical end 311 is correspondingly provided with two annular grooves 311a for cooperating with the first taper surface 221a and the second taper surface 221b, respectively, to form a multi-stage throttling port with a step change in cross-sectional area.

[0056] Specifically, the outer circumferential surface of the conical end 311 is provided with two annular grooves 311a arranged in sequence along the axial direction. The side wall of the valve port 221 is provided with a first taper surface 221a and a second taper surface 221b arranged in sequence along the axial direction.

[0057] When the conical end 311 abuts the valve port 221, the two annular grooves 311a correspond to the first taper surface 221a and the second taper surface 221b, respectively. When the conical end 311 is moved upward, three throttling ports are formed between the side wall of the conical end 311 and the side wall of the valve port 221. The cross-sectional areas of the three throttling ports increase in sequence along the axial direction of the valve port 221, thereby forming a multi-stage throttling port with a step change between the valve stem 310 and the throttling seat 220.

[0058] Therefore, by optimizing the cooperation structure of the valve stem 310 and the throttling seat 220, the liquid passing through the overflow valve can be subjected to segmented multi-stage pressure reduction processing, and the sharp step pressure drop is converted into a relatively moderate transition pressure drop, thereby reducing the bubbles generated due to cavitation effect, and greatly slowing down the damage of the water-based overflow valve due to cavitation.

[0059] Further, the taper angle of the first taper surface 221a is smaller than the taper angle of the second taper surface 221b, so that when the lowermost end of the conical end 311 sealingly abutting the valve port 221 is worn, the part of the conical end 311 abutting the valve port 221 is moved downward to abut the valve port 221, thereby ensuring that the valve stem 310 and the throttling seat 220 maintain good sealing contact for a long time.

[0060] On the basis of the above-mentioned embodiments, another embodiment of the utility model discloses a water-based overflow valve suitable for high-pressure large-flow working conditions.

[0061] The valve core assembly 300 further includes elastic member 320, which is arranged between the guide sleeve 210 and the valve rod 310, and is used to provide the pre-tightening force required for sealing the valve port 221.

[0062] Further, the other end of the valve rod 310 is provided with a mounting groove 312, which extends along the axial direction of the valve rod 310 and is formed in the middle of the end face of the valve rod 310.

[0063] On the basis of the above-mentioned embodiments, another embodiment of the utility model discloses a water-based overflow valve suitable for high-pressure large-flow working conditions.

[0064] In order to improve the sealing performance, the water-based overflow valve further includes a first sealing ring 400 located between the throttle seat 220 and the valve body 100.

[0065] Specifically, the bottom surface of the throttle seat 220 is provided with a circular annular first sealing groove 222.

[0066] Further, the water-based overflow valve further includes a second sealing ring 500 located between the guide sleeve 210 and the valve body 100.

[0067] The outer circumferential surface of the guide sleeve 210 is provided with a circular annular second sealing groove 211.

[0068] Further, the water-based overflow valve further includes a third sealing ring 600 located between the valve rod 310 and the guide sleeve 210.

[0069] The outer circumferential surface of the valve rod 310 is provided with a circular annular third sealing groove 313.

[0070] Further, the throttle seat 220 is provided with a screw hole 223 penetrating through both ends of the outer periphery of the valve port 221, which is used to pass the screw connected with the valve body 100.

[0071] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A water-based overflow valve suitable for high-pressure, high-flow-rate operating conditions, characterized in that, include: The valve body (100) is provided with an inlet channel (110) and a return channel (120) that extend perpendicularly to each other. The split valve sleeve structure (200) is installed at the position where the liquid inlet channel (110) and the liquid return channel (120) are connected; A valve core assembly (300) is used to block the inlet channel (110) from the return channel (120). The split valve sleeve structure (200) includes a guide sleeve (210) and a throttle seat (220) respectively embedded in the upper and lower side walls of the return channel (120). The throttle seat (220) has a valve port (221) that connects the inlet channel (110) and the return channel (120). The upper end of the valve core assembly (300) slides through the guide sleeve (210), and the lower end of the valve core assembly (300) abuts against and seals the valve port (221). When the pressure difference is greater than the set value, the lower end of the valve core assembly (300) moves upward and forms a throttling port with the valve port (221).

2. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to claim 1, characterized in that, From the return channel (120) to the inlet channel (110), the cross-section of the valve port (221) gradually decreases along the central axis of the inlet channel (110); The valve core assembly (300) includes a valve stem (310) with a conical end (311) located at one end of the valve stem (310) and abutting against the valve port (221), and the other end of the valve stem (310) is slidably connected to the guide sleeve (210).

3. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to claim 2, characterized in that, Along the central axis of the valve port (221), the sidewall of the valve port (221) is composed of several conical and cylindrical surfaces arranged alternately, and includes at least a first conical surface (221a) and a second conical surface (221b) with different cone angles. The conical end (311) has two annular grooves (311a) on its sidewall, which are used to cooperate with the first conical surface (221a) and the second conical surface (221b) to form a multi-stage throttling orifice with a stepped change in the intercepting area.

4. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to claim 3, characterized in that, The cone angle of the first conical surface (221a) is smaller than the cone angle of the second conical surface (221b).

5. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to any one of claims 2 to 4, characterized in that, The valve core assembly (300) also includes an elastic element (320) disposed between the guide sleeve (210) and the valve stem (310) for providing the preload required to seal the valve port (221) and for making the opening of the throttle port positively correlated with the pressure of the inlet channel (110).

6. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to claim 5, characterized in that, The other end of the valve stem (310) is provided with a mounting groove (312), the mounting groove (312) extends along the axial direction of the valve stem (310) and its opening is formed in the middle of the end face of the valve stem (310), and the elastic element (320) is partially embedded in the mounting groove (312).

7. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to claim 6, characterized in that, It also includes a first sealing ring (400) located between the throttle seat (220) and the valve body (100); The bottom surface of the throttle seat (220) is provided with a first annular sealing groove (222), the first sealing groove (222) is arranged to coincide with the central axis of the valve port (221), and the first sealing ring (400) is embedded in the first sealing groove (222).

8. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to claim 7, characterized in that, It also includes a second sealing ring (500) located between the guide sleeve (210) and the valve body (100); The outer circumferential surface of the guide sleeve (210) is provided with an annular second sealing groove (211), and the second sealing ring (500) is embedded in the second sealing groove (211).

9. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to claim 8, characterized in that, It also includes a third sealing ring (600) located between the valve stem (310) and the guide sleeve (210). The valve stem (310) has an annular third sealing groove (313) on its outer circumferential surface, and the third sealing ring (600) is embedded in the third sealing groove (313).

10. The water-based overflow valve suitable for high-pressure, high-flow-rate conditions according to claim 9, characterized in that, The throttle seat (220) has screw holes (223) extending through both ends of the valve port (221) on the outer periphery of the valve port (221) for threading screws that are connected to the valve body (100).

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