High-pressure cavitation valve

Abstract

The invention provides a high-pressure cavitation valve which comprises a valve body, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, and is characterized in that the valve body is internally provided with a mounting cavity and is provided with a flow inlet channel and a flow outlet channel; the valve cover is arranged at the upper part of the valve body and used for covering the upper side of the mounting cavity; the valve assembly comprises a valve element, a valve rod, a mounting seat, a valve seat and a throttling module, the mounting seat, the throttling module and the valve seat are sequentially arranged from top to bottom, a movable cavity of the valve element is formed in the mounting seat and the throttling module, the valve element is mounted in the movable cavity and used for acting up and down to be matched with the valve seat to open and close the valve, and the valve rod penetrates through the valve cover and then is connected with the valve element; the throttling module at least comprises two round throttling laminations which are arranged in an up-down overlapped mode, a center hole is formed in the center of each throttling lamination in a penetrating mode, a labyrinth flow channel used for reducing pressure and noise of media is formed between every two adjacent throttling laminations, and the labyrinth flow channels are not communicated with one another at the overlapped portions of the throttling laminations. The throttling module in the scheme can effectively play roles of throttling, pressure reduction and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a high-pressure cavitation valve. BACKGROUND

[0002] The traditional throttling valve for high-pressure differential working condition has a medium pressure as high as 69Mpa, a differential pressure as high as 40Mpa, and a solid-liquid-gas three-phase flow. Due to the large differential pressure, the step-by-step throttling structure (i.e. the throttling structure is composed of upper and lower throttling cavities in series) has a relatively poor pressure reduction effect. The medium can change the flow direction through the valve body and enter the valve core, which causes serious erosion of the valve body. SUMMARY

[0003] The present application provides a high-pressure cavitation valve to solve the above problems.

[0004] The present application provides a high-pressure cavitation valve, which comprises:

[0005] A valve body is provided with a mounting cavity, and an inlet channel and an outlet channel are formed in the valve body and communicate with the mounting cavity;

[0006] A valve cover is arranged on the upper part of the valve body and covers the upper side of the mounting cavity;

[0007] A valve assembly comprises a valve core, a valve rod, a mounting seat, a valve seat and a throttling module. From top to bottom, the mounting seat, the throttling module and the valve seat are arranged in sequence. The mounting seat and the throttling module are provided with a movable cavity of the valve core. The valve core is installed in the movable cavity and is used for up-down action to cooperate with the valve seat to open and close the valve. The valve rod is connected with the valve core after passing through the valve cover. The throttling module comprises at least two circular throttling laminates arranged in an overlapping manner. A center hole is formed in the center of the throttling laminate. A labyrinth flow channel for medium pressure reduction and noise reduction is formed between the adjacent two throttling laminates. The labyrinth flow channels are not communicated with each other at the overlapping parts of the laminates. The labyrinth flow channels are arranged along the radial direction of the throttling laminate, and at least two labyrinth flow channels are uniformly distributed along the circumference of the throttling laminate.

[0008] In an embodiment of the present application, the labyrinth flow channel comprises an inlet and an outlet. The inlet is located on the outside of the throttling module and communicates with the inlet channel. The outlet is located on the inner wall of the movable cavity and communicates with the movable cavity. The bottom of the movable cavity communicates with the outlet channel through the action of the valve core.

[0009] In an embodiment of the present application, when the valve opening degree of the high-pressure cavitation valve is 70% to 80%, the sum of the cross-sectional areas of the outlets of the labyrinth flow channels is greater than the minimum medium flow cross-sectional area between the valve core and the valve seat.

[0010] In an embodiment of the present application, the overlapping part of the two adjacent throttle laminates comprises a lower overlapping surface on the lower throttle laminate and an upper overlapping surface on the upper throttle laminate, and the lower overlapping surface and the upper overlapping surface are respectively provided with a labyrinth flow channel, and the labyrinth flow channels on the upper overlapping surface and the lower overlapping surface are radially staggered.

[0011] In an embodiment of the present application, the labyrinth flow channel further comprises at least two shunt hedging grooves arranged in series between the inlet and the outlet, the shunt hedging grooves are connected in series through a communication channel, and the medium flow cross-sectional area of the communication channel gradually increases from the circumference to the center; on the same labyrinth flow channel, the inlet is provided with one, and the outlet is provided with at least two, and the sum of the medium flow cross-sectional areas of the outlets is greater than the medium flow cross-sectional area of the inlet.

[0012] In an embodiment of the present application, the throttle module is provided with a protective bushing, the protective bushing is arranged on the inner wall of the mounting cavity, and an annular flow cavity is formed between the protective bushing and the throttle module, and the annular flow cavity is used for connecting the labyrinth flow channel and the inlet flow channel.

[0013] In an embodiment of the present application, the valve body is provided with a pressure relief channel, and the valve body is provided with a pressure relief assembly outside, the pressure relief channel and the annular flow cavity are connected through an assembly gap, and the pressure relief assembly is used for blocking or opening the pressure relief channel.

[0014] In an embodiment of the present application, the valve body is provided with a threaded port connected with the pressure relief assembly, the pressure relief assembly comprises a sealing pipe plug and a connecting sleeve, the sealing pipe plug is provided with a blocking part for blocking the pressure relief channel, the connecting sleeve is sleeved outside the sealing pipe plug and is threadedly connected with the threaded port, a spacing gap is arranged between the connecting sleeve and the sealing pipe plug, a stepped sealing surface is arranged between the connecting sleeve and the sealing pipe plug for cooperation, the connecting sleeve compresses and positions the sealing pipe plug through the stepped sealing surface, so that the blocking part blocks the pressure relief channel; the sealing pipe plug is provided with a pressure discharge channel for communication with the outside, and the pressure discharge channel is used for communicating and discharging pressure with the pressure relief channel after the blocking part is separated from the pressure relief channel.

[0015] In an embodiment of the present application, the valve seat is provided with an extension part extending into the outlet flow channel, and a through-flow channel is arranged along the axial direction of the extension part, and the diameter of the through-flow channel gradually increases from top to bottom.

[0016] In an embodiment of the present application, a multilayer sealing structure is arranged between the valve rod and the valve cover.

[0017] The beneficial effects of the present application: the high pressure cavitation valve provided by the present application provides installation space for the valve core, throttling module and valve seat through the installation cavity. The valve seat is arranged to cooperate with the valve core to open and close the valve, and the valve rod is arranged to drive the valve core to move up and down, thereby changing the valve opening. The throttling module is arranged to reduce the pressure, speed and noise of the medium flowing from the inlet channel, thereby reducing the erosion of the valve core and improving the service life of the valve. The flow path setting mode of the labyrinth flow channel can change the medium flow direction, increase the total length of the medium flow path, and further consume more medium energy, thereby better reducing the pressure and speed of the medium. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. It is apparent that the accompanying drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] In the drawings:

[0020] Figure 1 The structure diagram of the high pressure cavitation valve provided by an embodiment of the present application.

[0021] Figure 2 For Figure 1 The enlarged view of A in FIG.

[0022] Figure 3 For Figure 1 The enlarged view of B in FIG.

[0023] Figure 4 The structure diagram of the throttling module provided by an embodiment of the present application.

[0024] Figure 5 The upper surface diagram of the first layer of throttling laminations provided by an embodiment of the present application.

[0025] Figure 6 The lower surface diagram of the second layer of throttling laminations provided by an embodiment of the present application.

[0026] Figure 7 The upper surface diagram of the second layer of throttling laminations provided by an embodiment of the present application.

[0027] Figure 8 For Figure 7 The enlarged view of C in FIG.

[0028] Figure 9A lower surface schematic view of the third layer throttle stack provided in an embodiment of the present application.

[0029] Figure 10 An upper surface schematic view of the third layer throttle stack provided in an embodiment of the present application.

[0030] Figure 11 A lower surface schematic view of the fourth layer throttle stack provided in an embodiment of the present application.

[0031] Figure 12 An upper surface schematic view of the fourth layer throttle stack provided in an embodiment of the present application.

[0032] Figure 13 A lower surface schematic view of the fifth layer throttle stack provided in an embodiment of the present application.

[0033] Figure 14 An upper surface schematic view of the fifth layer throttle stack provided in an embodiment of the present application.

[0034] Reference signs are as follows:

[0035] valve body 1, inflow passage 101, outflow passage 102, pressure relief passage 103, horn 1031, annular flow cavity 104,

[0036] valve cover 2,

[0037] valve stem 3,

[0038] mounting seat 4,

[0039] valve core 5, connecting convex part 501, rotation stopping pin 502,

[0040] throttle module 6, movable cavity 601, throttle stack 602, first layer throttle stack 6021, second layer throttle stack 6022, third layer throttle stack 6023, fourth layer throttle stack 6024, fifth layer throttle stack 6025, connecting sleeve 603, metal inner lining 604, labyrinth flow passage 605, inlet 6051, shunt passage 6052, communication passage 6053, outlet 6054,

[0041] valve seat 7, valve seat body 701, extension 702, hard protective layer 703, outer edge table 7031, through-flow passage 704,

[0042] protective bushing 8, bushing body 801, hard inner layer 802,

[0043] pressure relief assembly 9, connecting shell 901, stepped sealing surface 9011, sealing pipe plug 902, pressure discharge passage 9021, communication hole 9022, plugging part 7023. DETAILED DESCRIPTION

[0044] The present application is described in greater detail by way of specific embodiments as follows. Those skilled in the art will readily understand other aspects and advantages of the application from the description that follows. The application may, however, be carried out in ways different than those set forth in the text without departing from the scope of the application. The description below is intended to be merely exemplary but not limiting of the present application. Thus, the scope of the present application should be determined by reasonable interpretation of the appended claims and not by the abstract thereof.

[0045] It should be understood that the drawings are schematic and that the relative dimensions of the components shown in the drawings are not necessarily to scale, and that the actual implementation of the components can vary in shape, size and proportions, and that the layout of the components can be more complex.

[0046] In the following description, numerous specific details are discussed in order to provide a thorough explanation of the embodiments of the application. It will be apparent, however, to one of ordinary skill in the art that embodiments of the application can be practiced without these specific details. In other instances, well-known structures and devices are not described in detail in order to avoid obscuring the embodiments of the application.

[0047] Please refer to Figures 1 to 14 An embodiment of the application provides a high-pressure cavitation valve, which comprises:

[0048] A valve body 1, which is provided with a mounting cavity, and an inlet flow channel 101 and an outlet flow channel 102 are formed on the valve body 1 and communicate with the mounting cavity;

[0049] A valve cover 2, which is arranged on the upper part of the valve body 1 and covers the upper side of the mounting cavity;

[0050] A valve assembly, which comprises a valve core 5, a valve rod 3, a mounting seat 4, a valve seat 7 and a throttling module 6. From top to bottom, the mounting seat 4, the throttling module 6 and the valve seat 7 are arranged in sequence. The mounting seat 4 and the throttling module 6 are provided with a movable cavity 601 of the valve core 5. The valve core 5 is arranged in the movable cavity 601 and is used for opening and closing the valve by cooperating with the valve seat 7. The valve rod 3 is connected with the valve core 5 after penetrating through the valve cover 2. The throttling module 6 comprises at least two circular throttling laminates 602 arranged in sequence. A center hole is formed in the center of the throttling laminate 602. A labyrinth flow channel 605 for pressure reduction and noise reduction of the medium is formed between the adjacent two throttling laminates 602. The labyrinth flow channels 605 are arranged along the radial direction of the throttling laminate 602, and at least two labyrinth flow channels 605 are uniformly distributed along the circumference of the throttling laminate 602.

[0051] The installation cavity is opened downward from the upper end surface of the valve body 1, and the valve cover 2 seals the upper side of the installation cavity.

[0052] In this embodiment, the installation cavity provides installation space for the valve core 5, the throttling module 6, and the valve seat 7. The valve seat 7 is configured to cooperate with the valve core 5 to open and close the valve. The valve stem 3 is configured to drive the valve core 5 to move up and down, thereby changing the valve opening. The throttling module 6 is configured to reduce the pressure, speed, and noise of the medium flowing from the inlet passage 101, thereby reducing the erosion of the valve core 5 and improving the service life of the valve. Compared with the straight flow path, the labyrinth flow path 605 changes the flow path by bending, changes the medium flow direction, increases the total length of the medium flow path, and thus consumes more medium energy, better reducing the pressure and speed of the medium.

[0053] In an exemplary embodiment, the medium of the high-pressure cavitation valve is side-in and bottom-out, so as to increase the sealing performance between the valve core 5 and the valve seat 7 by utilizing the application environment of high pressure difference of the medium. That is, the inlet passage 101 is arranged on the side wall of the valve body 1, and the outlet passage 102 is arranged at the bottom of the valve body 1.

[0054] In an exemplary embodiment, the labyrinth flow path 605 includes an inlet 6051 and an outlet 6054. The inlet 6051 is located outside the throttling module 6 and communicates with the inlet passage 101. The outlet 6054 is located on the inner wall of the movable cavity 601 and communicates with the movable cavity 601. The bottom of the movable cavity 601 communicates with the outlet passage 102 through the action of the valve core 5.

[0055] In this embodiment, the medium flows from the outside of the throttling module 6 to the inside of the throttling module 6.

[0056] In an exemplary embodiment, when the valve opening of the high-pressure cavitation valve is 70% to 80%, the sum of the cross-sectional areas of the outlets of the labyrinth flow paths 605 is greater than the minimum medium flow cross-sectional area between the valve core 5 and the valve seat 7.

[0057] In an exemplary embodiment, when the valve opening of the high-pressure cavitation valve is 70%, the valve core position is shown in FIG. 6. Figure 1

[0058] It is worth noting that the opening of the valve generally corresponds to the size of the flow of the valve. Generally, when the corresponding opening is reached, it is expected that the medium flow can meet the corresponding demand. Therefore, the sum of the cross-sectional areas of the outlets of the labyrinth flow paths 605 needs to be greater than the minimum medium flow cross-sectional area between the valve core 5 and the valve seat 7, so that the valve core 5 can act upward to make the medium flow meet the demand when the valve opening meets the demand.

[0059] ​For example, when the lower end of the valve core 5 extends into the valve seat 7 to block the valve seat 7, the valve opening degree is 0%. When the valve core 5 moves upward, the valve opening degree increases continuously.

[0060] In an exemplary embodiment, the overlapping part of the two adjacent throttle plates 602 includes a lower overlapping surface on the lower throttle plate 602 and an upper overlapping surface on the upper throttle plate 602, and the labyrinth flow channels 605 are arranged on the lower overlapping surface and the upper overlapping surface respectively, and the labyrinth flow channels 605 on the upper overlapping surface and the lower overlapping surface are arranged radially offset.

[0061] For example, the radial offset angle a between the labyrinth flow channels 605 on the upper overlapping surface and the lower overlapping surface is 30°.

[0062] It should be noted that, in order to avoid mutual interference of the media in the labyrinth flow channels 605, affecting the throttling, pressure reduction and speed reduction effect, the labyrinth flow channels 605 are arranged independently of each other. In order to facilitate processing, the labyrinth flow channels 605 are arranged on the surface of the throttle plate 602. The independent arrangement of the labyrinth flow channels 605 is achieved by the offset arrangement of the labyrinth flow channels 605 on the two adjacent throttle plates 602.

[0063] For example, the throttle module 6 further includes a connecting sleeve 603 arranged above the throttle plate 602, and the throttle plate 602 and the connecting sleeve 603 are made of hard alloy to increase the anti-erosion ability. In order to control the cost, the connecting sleeve 603 is provided with a mounting inner cavity, and a metal lining 604 is arranged in the mounting inner cavity, and the metal lining 604 is made of steel or the like. The throttle plate 602 is provided with a center hole, and the inner wall of the metal lining 604 is flush with the center hole to form the movable cavity 601 of the valve core 5.

[0064] For example, in the direction from bottom to top, the number of labyrinth flow channels 605 on the throttle plate 602 increases. The diameter of the bottom of the valve core 5 gradually decreases downward. It should be noted that due to the different heights of the upper and lower positions, the diameter of the valve core 5 changes, and the pressure of the medium changes. In order to protect the valve core 5 and reasonably control the pressure of the medium, the number of labyrinth flow channels 605 increases from bottom to top, and remains at a fixed value after increasing to a fixed value.

[0065] For example, the throttle plate 602 is provided with five layers, and in the direction from bottom to top, the number of labyrinth flow channels 605 between the two adjacent throttle plates 602 is 5, 9, 12 and 12 in turn.

[0066] For example, the throttle plate 602 is provided with five layers, and the number of labyrinth flow channels 605 arranged on the first layer, the second layer and the third layer increases in turn, and the number of labyrinth flow channels 605 arranged on the fourth layer and the fifth layer is consistent with that of the third layer.

[0067] Exemplarily, the throttle laminates 602 are provided with five layers. In the direction from bottom to top, the upper surface of the first layer of throttle laminates 6021 is provided with two labyrinth flow channels 605, the lower surface and the upper surface of the second layer of throttle laminates 6022 are both provided with three labyrinth flow channels 605, so that a total of five labyrinth flow channels 605 are provided between the first layer of throttle laminates 6021 and the second layer of throttle laminates 6022. The lower surface and the upper surface of the third layer of throttle laminates 6023 are both provided with six labyrinth flow channels 605, so that nine labyrinth flow channels 605 are formed between the second layer of throttle laminates 6022 and the third layer of throttle laminates 6023. The upper surface and the lower surface of the fourth layer of throttle laminates 6024 and the fifth layer of throttle laminates 6025 are both provided with six labyrinth flow channels 605, so that twelve labyrinth flow channels 605 are formed between the third layer of throttle laminates 6023 and the fourth layer of throttle laminates 6024 and between the fourth layer of throttle laminates 6024 and the fifth layer of throttle laminates 6025, respectively. Six labyrinth flow channels 605 are formed between the upper surface of the fifth layer of throttle laminates 6025 and the connecting sleeve 603 (the lower surface of the connecting sleeve 605 is not provided with a labyrinth flow channel 605).

[0068] It should be further noted that the number of labyrinth flow channels 605 provided on the throttle laminates 602 is different for different layers, and also to facilitate staggered distribution of the labyrinth flow channels 605 on the overlapping surface.

[0069] In an exemplary embodiment, the labyrinth flow channel 605 further comprises at least two shunt hedging grooves arranged in series between the inlet 6051 and the outlet 6054, the shunt hedging grooves are connected in series through the communication channels 6053, and the medium flow cross-sectional area of the communication channels 6053 increases sequentially from the circumference to the center; on the same labyrinth flow channel 605, the inlet 6051 is provided with one, the outlet 6054 is provided with at least two, and the sum of the medium flow cross-sectional areas of the outlets 6054 is greater than the medium flow cross-sectional area of the inlet 6051.

[0070] It should be noted that, in order to avoid blockage caused by particles in the medium, the width of the labyrinth flow channel 605 gradually increases along the flow direction of the medium, so as to reduce the possibility of blockage in the labyrinth flow channel 605. Moreover, the labyrinth flow channel 605 is provided on the surface of the throttle laminates 602, which is also convenient for cleaning the labyrinth flow channel 605.

[0071] Exemplarily, in the order from small to large, the medium flow cross-sectional area of the inlet 6051 is the smallest, the medium flow cross-sectional area of the inlet 6051 is smaller than the medium flow cross-sectional area of the shunt channel 6052, the medium flow cross-sectional area of the shunt channel 6052 is greater than or equal to the medium flow cross-sectional area of the smallest communication channel 6053, and the medium flow cross-sectional area of the outlet is greater than or equal to the medium flow cross-sectional area of the largest connecting channel.

[0072] Exemplarily, the flow distribution and balance groove comprises a flow distribution port, a flow distribution channel 6052 and a flow convergence port. The medium in the inlet 6051 is distributed into the flow distribution channel 6052 through the flow distribution port, and then converges at the flow convergence port. The medium pressure is offset by the medium at the flow convergence port, thereby reducing the medium flow rate and the scouring intensity on the valve element 5.

[0073] Exemplarily, the flow distribution channel 6052 is opposite to the flow convergence port, and the flow distribution channel 6052 is provided with two flow distribution channels 6052 which are consistent in width, depth and length.

[0074] In an exemplary embodiment, the throttling module 6 is sleeved with a protective bushing 8, the protective bushing 8 is arranged on the inner wall of the mounting cavity, and an annular flow cavity 104 is formed between the protective bushing 8 and the throttling module 6, and the annular flow cavity 104 is used for connecting the labyrinth flow channel 605 and the inflow channel 101.

[0075] In the embodiment, in order to increase the uniformity of the scouring intensity on the valve element 5, the labyrinth flow channel 605 is arranged around the valve element 5. In order to facilitate the medium to enter the labyrinth flow channel 605, the annular flow cavity 104 is arranged, so that the inlet 6051 of the labyrinth flow channel 605 is connected through the annular flow cavity 104, and the labyrinth flow channels 605 are arranged in a parallel mode. The protective bushing 8 is arranged to protect the inner wall of the mounting cavity in the valve body 1.

[0076] Exemplarily, the protective bushing 8 comprises a bushing body 801 and a hard inner layer 802, and the hard inner layer 802 is a sintered hard alloy insert which is used for protecting the bushing body 801.

[0077] In an exemplary embodiment, the valve body 1 is provided with a pressure relief channel 103, and the valve body 1 is provided with a pressure relief assembly 9. The pressure relief channel 103 and the annular flow cavity 104 are connected through an assembly gap, and the pressure relief assembly 9 is used for plugging or opening the pressure relief channel 103.

[0078] It should be noted that when the valve is offline, the stop valves at the front and rear ends of the valve need to be closed. At this time, there is residual pressure in the valve. If the valve is directly removed, it will easily cause harm to the operator. Therefore, the pressure relief channel 103 and the pressure relief assembly 9 are arranged to perform pressure relief operation after the stop valves at the front and rear ends of the valve are closed, thereby increasing the operation safety.

[0079] Exemplarily, there is an assembly gap between the protective bushing 8 and the mounting cavity, so that the internal pressure of the valve can be discharged through the pressure relief channel 103.

[0080] In an exemplary embodiment, the valve body 1 is provided with a threaded port connected to the pressure relief assembly 9, the pressure relief assembly 9 includes a sealing pipe plug 902 and a connecting sleeve 901, the sealing pipe plug 902 is provided with a blocking part 7023 for blocking the pressure relief channel 103, the connecting sleeve 901 is sleeved outside the sealing pipe plug 902 and is threadedly connected with the threaded port, a spacing gap is arranged between the connecting sleeve 901 and the sealing pipe plug 902, a stepped sealing surface 9011 is arranged between the connecting sleeve 901 and the sealing pipe plug 902 for cooperation, the connecting sleeve 901 presses and positions the sealing pipe plug 902 through the stepped sealing surface 9011, so that the blocking part 7023 blocks the pressure relief channel 103; the sealing pipe plug 902 is provided with a pressure discharge channel 9021 for communicating with the outside, the pressure discharge channel 9021 is used for communicating with the pressure relief channel 103 to discharge pressure after the blocking part 7023 is separated from the pressure relief channel 103.

[0081] When the high-pressure cavitation valve (referred to as valve) works normally, the connecting sleeve 901 is screwed in, so that the connecting sleeve 901 abuts against the stepped sealing surface 9011, and then the blocking part 7023 blocks the pressure relief channel 103. When it is needed to open the pressure relief channel 103 for pressure relief, the connecting sleeve 901 is screwed out, the stepped sealing surface 9011 between the connecting sleeve 901 and the sealing pipe plug 902 is separated, and the sealing pipe plug 902 acts outward under the pressure of the valve inside, so that the pressure relief channel 103 is opened, and then pressure relief is performed.

[0082] Illustratively, the pressure relief channel 103 is provided with a bell mouth 1031 at one end close to the threaded port, and the blocking part 7023 is a circular truncated cone arranged on the sealing pipe plug 902.

[0083] It should be noted that a gap is arranged between the connecting sleeve 901 and the sealing pipe plug 902, so that the sealing pipe plug 902 does not rotate when the connecting sleeve 901 is rotated, thereby reducing the possibility of wear of the bell mouth 1031 and the circular truncated cone.

[0084] Illustratively, the pressure discharge channel 9021 is opened along the axial direction of the sealing pipe plug 902, and a labyrinth pipe plug is in communication with the gap between the connecting sleeve 901 and the sealing pipe plug 902 at one end close to the blocking part 7023.

[0085] Illustratively, the pressure discharge channel 9021 is in communication with the gap between the connecting sleeve 901 and the sealing pipe plug 902 through a communication hole 9022, the communication hole 9022 is arranged vertically with the pressure discharge channel 9021, and is arranged at a position close to the circular truncated cone of the sealing pipe plug 902, between the circular truncated cone and the stepped sealing surface 9011.

[0086] In an exemplary embodiment, the valve seat 7 is provided with an extension 702 extending towards the outflow channel 102, and a through-flow channel 704 is formed along the axial direction of the extension 702, and the diameter of the through-flow channel 704 gradually increases in the upward direction.

[0087] It should be noted that the extension 702 is provided to protect the inner wall of the outflow channel 102 and reduce the possibility of erosion of the inner wall of the outflow channel 102. The diameter of the through-flow channel 704 gradually increases to adjust the flow rate of the medium and solve the problem of erosion caused by flashing of the medium.

[0088] Exemplarily, the valve seat 7 includes a valve seat body 701 and a hard protective layer 703, the extension 702 is provided on the valve seat body 701, a medium channel is provided in the valve seat body 701, and the hard protective layer 703 is provided in the medium channel to protect the inner wall of the medium channel. The through-flow channel 704 is formed in the hard protective layer 703, and the diameter of the through-flow channel 704 gradually increases downward by changing the thickness of the hard protective layer 703.

[0089] Exemplarily, the top of the hard protective layer 703 is stepped with the valve seat body 701, that is, the hard protective layer 703 is provided with an outer edge platform 7031 which protrudes outward, and a stepped groove is provided on the valve seat body 701 correspondingly, and the outer edge platform 7031 is matched with the stepped groove to increase the stability of the hard protective layer 703.

[0090] Exemplarily, the valve core 5 is made of hard alloy to increase the erosion resistance.

[0091] Exemplarily, the bottom end of the valve stem 3 is provided with a connecting groove, the top of the valve core 5 is provided with a connecting protrusion 501, and the connecting groove and the connecting protrusion 501 are threadedly connected to increase the connection stability therebetween, and the connecting protrusion 501 and the connecting groove are provided to support and limit the valve core 5. The valve stem 3 is made of ordinary steel or other metal materials, and the valve core 5 is made of hard metal, so that it not only meets the requirement of controlling cost, but also effectively increases the erosion resistance of the valve core 5. A stop pin 502 is provided through the outer wall of the valve stem 3 and into the valve core 5, and the stop pin 502 is welded after installation to avoid falling out and increase the connection stability. The stop pin 502 is provided to avoid relative rotation of the valve stem 3 and the valve core 5.

[0092] In an exemplary embodiment, a plurality of sealing structures are provided between the valve stem 3 and the valve cover 2.

[0093] Exemplarily, the multiple sealing structure between the valve cover 2 and the valve body 1 is realized by combining the spring energy sealing ring and the tooth-shaped combined gasket, the spring energy sealing ring is a pressure self-sealing structure, the higher the pressure is, the better the sealing effect is, and it is determined that the medium does not leak from the upper valve cover 2 and the valve body 1. The pressure self-sealing combined spring energy sealing ring and the metal wound gasket are used for double sealing at the valve seat 7, so as to ensure that the medium does not leak from the cooperation between the valve seat 7 and the valve body 1, and the leakage level of the valve can be effectively improved.

[0094] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A high-pressure cavitation valve, characterized in that: include: A valve body, wherein a mounting cavity is provided in the valve body, and an inlet channel and an outlet channel communicating with the mounting cavity are opened on the valve body; a valve cover, disposed on the upper portion of the valve body and used to cover the upper side of the installation cavity; The valve assembly includes a valve core, a valve stem, a mounting seat, a valve seat and a throttling module. From top to bottom, the mounting seat, throttling module and valve seat are arranged in sequence. The mounting seat and throttling module are provided with an active cavity of the valve core. The valve core is installed in the active cavity and is used for up and down movements to cooperate with the valve seat to open and close the valve. The valve stem is connected to the valve core after passing through the valve cover; the throttling module includes at least two circular throttling laminations arranged in an overlapping manner, and a center hole is opened through the center of the throttling lamination. A labyrinth flow channel for reducing the pressure and noise of the medium is formed between two adjacent throttling laminations, and the labyrinth flow channels are not connected to each other at the overlapping parts of each layer of throttling laminations; the labyrinth flow channel is arranged along the radial direction of the throttling lamination, and there are at least two labyrinth flow channels evenly distributed along the circumference of the formed throttling lamination.

2. The high-pressure cavitation valve according to claim 1, characterized in that: The labyrinth flow channel includes an inlet and an outlet. The inlet is located on the outside of the throttling module and is connected to the inlet channel. The outlet is located on the inner wall of the active cavity and is connected to the active cavity. The bottom of the active cavity is connected to the outlet channel through the action of the valve core.

3. The high-pressure cavitation valve according to claim 2, characterized in that: When the valve opening of the high-pressure cavitation valve is 70% to 80%, the sum of the outlet cross-sectional areas of the labyrinth flow channels is larger than the minimum medium flow cross-sectional area between the valve core and the valve seat.

4. The high-pressure cavitation valve according to claim 2, characterized in that: The overlapping parts of two adjacent throttling laminations include a lower overlapping surface located on the lower throttling lamination and an upper overlapping surface located on the upper throttling lamination. Labyrinth flow channels are respectively provided on the lower overlapping surface and the upper overlapping surface. The labyrinth flow channels on the upper overlapping surface and the lower overlapping surface are radially staggered.

5. The high-pressure cavitation valve according to claim 4, characterized in that: The labyrinth flow channel also includes at least two diversion and hedging grooves arranged in series between the inlet and the outlet, and the diversion and hedging grooves are connected in series through connecting channels. From the circumference to the center of the circle, the medium flow cross-sectional areas of the connecting channels increase one by one; on the same labyrinth flow channel, there is one inlet and at least two outlets, and the sum of the medium flow cross-sectional areas of the outlets is greater than the medium flow cross-sectional area of ​​the inlet.

6. The high-pressure cavitation valve according to claim 1, characterized in that: The outer cover of the throttling module is provided with a protective sleeve, which is arranged on the inner wall of the installation cavity and forms an annular flow cavity between the protective sleeve and the throttling module. The annular flow cavity is used to connect the labyrinth flow channel and the inlet channel.

7. The high-pressure cavitation valve according to claim 6, characterized in that: A pressure relief channel is provided on the valve body, a pressure relief assembly is provided outside the valve body, the pressure relief channel is communicated with the annular flow cavity via an assembly gap, and the pressure relief assembly is used to block or open the pressure relief channel.

8. The high-pressure cavitation valve according to claim 7, characterized in that: The valve body is provided with a threaded opening for connecting the pressure relief assembly, and the pressure relief assembly includes a sealing pipe plug and a connecting shell, and the sealing pipe plug is provided with a sealing portion for sealing the pressure relief channel, and the connecting shell is arranged outside the sealing pipe plug and is threadedly connected to the threaded opening, and a spacing gap is provided between the connecting shell and the sealing pipe plug, and a stepped sealing surface for matching is provided between the connecting shell and the sealing pipe plug, and the connecting shell presses and limits the sealing pipe plug through the stepped sealing surface so that the sealing portion blocks the pressure relief channel; a pressure discharge channel for communicating with the outside is provided in the sealing pipe plug, and the pressure discharge channel is used to communicate with the pressure relief channel to discharge pressure after the sealing portion is separated from the pressure relief channel.

9. The high-pressure cavitation valve according to claim 1, characterized in that: An extension portion is provided on the valve seat and extends into the outflow channel, and a flow channel is provided along the axial direction of the extension portion. The diameter of the flow channel gradually increases from top to bottom.

10. The high-pressure cavitation valve according to any one of claims 1 to 9, characterized in that: A multi-layer sealing structure is provided between the valve stem and the valve cover.

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