Combination valve

Abstract

A combination valve includes: a manifold block having a flow passage therein; a cover body; the valve cavity is formed in the manifold block and communicates with the flow channel; a valve core member; a driving member; the multiple valve cavities comprise the upstream side valve cavity and the downstream side valve cavity. The flow channel comprises a liquid inlet flow channel, a first section, an expansion cavity, a second section and a liquid outlet flow channel; the liquid inlet flow channel, the upstream side valve cavity, the first section, the expansion cavity, the second section, the downstream side valve cavity and the liquid outlet flow channel are sequentially communicated in series, and a certain included angle is formed between the first section and the second section, so that fluid in the first section continues to flow in the second section in the flowing direction different from that of the first section after passing through the expansion cavity; a forming opening is formed in the bottom end of the expansion cavity; a bottom plate is arranged at the bottom end of the manifold block, the bottom plate is fixedly connected with the manifold block or the cover body, a plug is arranged at the top end of the bottom plate in a matched mode, the plug can seal the forming opening, and the manifold has the advantages of being small in flow resistance, convenient to machine and good in sealing performance.

Description

Technical Field

[0001] This utility model relates to the technical field of valve structures, and in particular to a combination valve. Background Technology

[0002] Valves are primarily installed in flow path systems to control the state of fluids within those systems. However, with technological advancements, flow path systems require more functions and become more complex, leading to an increase in valve body structures and consequently, a larger space requirement. To reduce the space occupied by valve bodies, a type of combination valve exists, which integrates multiple valve bodies onto a single unit to achieve different functions.

[0003] For example, Japanese Patent Publication No. JP4319322B2 discloses an assembly method for a flow control valve and a flow control valve assembled by the assembly method. Specifically, it discloses that in the valve body, the unit block 2 constituting the basis of the valve unit 1 has an inlet 11 and an outlet 12 protruding from both ends, forming an L-shaped input flow path 13 and an output flow path 14. In addition, at the opening of the mounting surface where the input flow path 13 and the output flow path 14 are provided, a recess constituting the valve chambers 15 and 16 is formed to connect the two valve chambers 15 and 16, and a V-shaped channel 17 is formed between the valve chambers 15 and 16 to connect the valve chambers 15 and 16.

[0004] However, in the flow control valve shown in the above patent, the two valve chambers 15 and 16 are connected through the V-shaped flow channel 17. On the one hand, when the fluid flows at the corner of the V-shaped flow channel 17, the fluid will generate more severe turbulence and hinder the flow of the fluid. This will result in greater flow resistance at the corner and greater pressure loss when the fluid passes through the corner. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the defects in the prior art, thereby providing a combined valve. To achieve the above objective, this utility model adopts the following technical solution:

[0006] A combination valve, comprising:

[0007] The manifold block has internal flow channels;

[0008] The cover is installed on top of the manifold block;

[0009] A valve chamber is disposed within the manifold block and communicates with the flow channel, with the side of the valve chamber facing the cover being an opening.

[0010] The valve core component seals the opening and can move within the valve cavity to change the fluid state within the valve cavity;

[0011] a driving component at least partially installed in the cover body, the driving component being connected with the valve core component to drive the valve core component to move;

[0012] The valve cavities are provided in plurality and include upstream-side valve cavities and downstream-side valve cavities;

[0013] The flow channel includes a liquid inlet flow channel, a first section, an expansion cavity, a second section and a liquid outlet flow channel;

[0014] The liquid inlet flow channel, the upstream-side valve cavities, the first section, the expansion cavity, the second section, the downstream-side valve cavities and the liquid outlet flow channel are sequentially and serially connected, and the first section and the second section are at a certain angle, so that the fluid in the first section continues to flow in the second section in a flow direction different from that in the first section after passing through the expansion cavity;

[0015] The expansion cavity is provided with a shaped opening at the bottom end;

[0016] The manifold block is provided with a bottom plate at the bottom end, the bottom plate is fixedly connected with the manifold block or the cover body, a plug is provided at the top end of the bottom plate, and the plug can seal the shaped opening.

[0017] In the above scheme, the upstream-side valve cavities, the first section, the expansion cavity, the second section and the downstream-side valve cavities are sequentially connected in the flow direction of the fluid, so that when the fluid flows from the first section to the expansion cavity, the flow rate of the fluid will be reduced, and part of the kinetic energy of the fluid will be converted into pressure energy. Thus, the fluid can not directly impact on the inner wall of the chamber or flow channel at the turning point when the fluid turns, so as to reduce the turbulence intensity when the fluid turns, and the kinetic energy loss of the fluid is relatively small. In addition, the strong turbulence does not hinder the flow of the fluid, so that the flow resistance of the fluid is greatly increased. That is, through the arrangement of the expansion cavity, the pressure loss and flow resistance of the fluid when flowing at the connection between the first section and the second section can be effectively reduced.

[0018] Further, the expansion cavity is provided with a shaped opening at the bottom end, which is beneficial to the processing of the expansion cavity. The plug is provided at the top end of the bottom plate, so that when the bottom plate is fixedly connected with the manifold block or the cover body, the plug can seal the shaped opening. On the one hand, the fixing structure of the plug is not needed, so that the structure of the plug is simple and the installation is convenient. On the other hand, the bottom plate can support the plug, so that when the plug is sealed at the shaped opening, the plug is not easily deformed due to the impact of the fluid in the expansion cavity or the pressure fluctuation or excessive pressure in the expansion cavity, and the sealing between the plug and the shaped opening is not easily lost. Of course, the plug and the bottom plate can be integrally formed or fixedly connected, or can be separately provided, and the plug is directly pressed in the shaped opening by the bottom plate.

[0019] Preferably, the plug is provided separately from the bottom plate, and the plug is press-fitted into the shaped opening by the bottom plate in an interference fit to seal the shaped opening.

[0020] In the above scheme, the plug and the bottom plate are provided in a separate structure, so that the plug can be pre-aligned with the shaped opening during installation, and then press-fitted into the shaped opening under the push of the bottom plate, which facilitates the installation of the plug and the shaped opening. In addition, by providing the plug and the bottom plate separately, different materials can be used between the plug and the bottom plate to meet different functions of the plug and the bottom plate.

[0021] Preferably, a first annular groove recessed upward is arranged on the top wall of the shaped opening, and the first annular groove is arranged outside the expansion cavity.

[0022] The plug comprises a main body and a first annular protrusion arranged on the main body, and the first annular protrusion can be sealingly inserted into the first annular groove.

[0023] In the above scheme, through the sealing insertion fit of the first annular groove and the first annular protrusion, the sealing effect of the plug and the shaped opening can be further guaranteed, and the liquid inside the expansion cavity can be prevented from leaking from the shaped opening. At the same time, the first annular protrusion can have a thickness slightly greater than the width of the first annular groove, so that the inner and outer side walls of the first annular protrusion are in interference abutment with the inner and outer side walls of the first annular groove, and are in abutting and sealing arrangement with the inner wall of the first annular groove. Of course, the top end of the first annular protrusion can also be in abutment with the upper top wall of the first annular groove to achieve the sealing effect. Alternatively, the inner and outer side walls of the first annular protrusion are in interference abutment and sealing with the inner and outer side walls of the first annular groove, and the top end of the first annular protrusion is in sealing abutment with the upper top wall of the first annular groove, to guarantee the sealing effect of the plug.

[0024] Preferably, the plug comprises an extension portion extending from the main body to the inside of the expansion cavity, and the extension portion is in abutment with the inner wall of the expansion cavity.

[0025] The first annular protrusion, the main body and the extension portion form a second annular groove, and the top wall of the shaped opening forms a second annular protrusion radially inside the first annular groove, and the second annular protrusion can be inserted into the second annular groove.

[0026] In the above scheme, through the cooperation between the extension portion and the expansion cavity, the sealing effect of the plug can be further improved. At the same time, the cooperation between the first annular groove and the first annular protrusion, and the cooperation between the second annular groove and the second annular protrusion, can form a labyrinth seal structure, which can further increase the sealing effect of the plug on the expansion cavity.

[0027] Preferably, the extension portion is in the form of a solid columnar structure, and the extension portion is press-fitted into the inside of the expansion cavity.

[0028] In the above scheme, the extension part is a solid columnar structure and is interference-fitted with the expansion cavity, so that when the extension part is impacted by the fluid, the extension part is not prone to deformation, thereby ensuring the sealing effect between the extension part and the inner wall of the expansion cavity. That is, the interior of the extension part is not hollow, so that the side wall of the extension part is not prone to inward deformation, thereby affecting the sealing effect between the extension part and the inner wall of the expansion cavity. The solid columnar structure of the extension part can be a cylindrical structure or a frustum columnar structure.

[0029] Preferably, the top end surface of the extension part is located at the lower side of the communication opening of the first section and the second section with the expansion cavity.

[0030] In the above scheme, the extension part can avoid protruding to the communication opening to block part of the communication opening area, thereby avoiding structural dead angles at the communication opening, avoiding the accumulation or deposition of impurities at the structural dead angles, and affecting the cleanliness of the fluid. At the same time, the setting of the extension part can also effectively avoid affecting the flow effect of the fluid between the first section, the expansion cavity and the second section.

[0031] Preferably, the expansion cavity has an inclined side wall which is inclined and oppositely arranged with the bottom plate.

[0032] Part of the plug is interference-pressed between the inclined side wall and the bottom plate of the expansion cavity.

[0033] In the above scheme, part of the plug is interference-pressed between the inclined side wall and the bottom plate of the expansion cavity, so that the bottom plate can transmit the force to the plug and the inclined side wall of the expansion cavity, increase the pressing force between the plug and the inclined side wall of the expansion cavity, and ensure better sealing effect between the plug and the inner wall of the expansion cavity.

[0034] Preferably, the expansion cavity is a straight columnar chamber, the cross-sectional area and the height of the expansion cavity are greater than the diameter of the first section, and the forming opening is arranged at one end of the expansion cavity along the axis direction, thereby facilitating the machining of the expansion cavity from one end of the forming opening.

[0035] Alternatively, the expansion cavity is a circular truncated cone chamber, the minimum diameter of the cross-sectional area of the expansion cavity is greater than the diameter of the first section, and the forming opening is arranged at one end of the expansion cavity along the axis direction, thereby facilitating the machining of the expansion cavity from one end of the forming opening.

[0036] Preferably, the valve core part matched with the downstream valve cavity includes a diaphragm and a valve core, the diaphragm is arranged on the valve core ring side and is used to seal the opening part of the downstream valve cavity.

[0037] The downstream valve cavity has a valve seat and is annularly arranged at the outlet end of the second section, and the valve core can seal the valve seat to disconnect the downstream valve cavity from the second section.

[0038] In the above scheme, when the valve core in the downstream valve cavity is in the closed state, the downstream valve cavity is not communicated with the expansion cavity, thereby ensuring that the higher fluid pressure in the downstream valve cavity does not act on the diaphragm of the downstream valve, so that the diaphragm is not easily damaged in the high-pressure environment for a long time.

[0039] Preferably, the manifold block is made of resin material, and the hardness of the cover and the bottom plate is greater than the hardness of the manifold block, the cover and the bottom plate are connected by bolts, and the manifold block is compressed between the cover and the bottom plate.

[0040] And / or, the plug is made of rubber or resin material, and the hardness of the bottom plate is greater than the hardness of the plug.

[0041] In the above scheme, the manifold block is made of resin material, which can ensure that the manifold block has good corrosion resistance, but in this case, the manifold block is directly connected to the cover or the bottom plate by a bolt structure, which will cause stress to concentrate at the bolt connection, causing the manifold block to easily creep and deform. Therefore, by setting the hardness of the cover and the bottom plate to be greater than the hardness of the manifold block, the cover and the bottom plate are not easily deformed relative to the manifold block, and the cover and the bottom plate are connected by bolts between them, and the manifold block is compressed between the cover and the bottom plate. The connection between the cover, the manifold block and the bottom plate can be achieved, and the extrusion force on the manifold block will be dispersed in the contact area between the manifold block and the cover and the bottom plate, thereby avoiding stress concentration and ensuring that the manifold block is not easily deformed by creep.

[0042] By making the plug of rubber or resin material, the plug can have good corrosion resistance, and the rubber or resin can be elastically deformed to achieve better sealing effect. The hardness of the bottom plate is greater than the hardness of the plug, so that the bottom plate is not easily deformed, and the plug can be better supported to avoid deformation caused by the impact or pressure of the fluid in the expansion cavity.

[0043] Compared with the prior art, the utility model has the advantages that:

[0044] By connecting the upstream valve cavity, the first section, the expansion cavity, the second section and the downstream valve cavity in sequence along the fluid flow direction, the expansion cavity between the first section and the second section can buffer the fluid and stabilize the fluid during the process of the fluid flowing from the upstream valve cavity to the downstream valve cavity. When the fluid enters the expansion cavity from the first section, the flow rate of the fluid is reduced, so as to reduce the turbulence intensity of the fluid impacting on the inner wall of the flow channel or the chamber when turning, thereby reducing energy loss and avoiding the situation that the flow resistance of the fluid is too large due to too large turbulence intensity.

[0045] Further, the shaped opening is arranged at the bottom end of the expansion cavity, which is beneficial for the processing of the expansion cavity and the first section and the second section, and the plug is arranged at the top end of the bottom plate, so that the plug can be pressed at the shaped opening in the process of fixing the bottom plate with the manifold block or the cover, on the one hand, the fixing structure of the plug is not needed, so that the structure of the plug is simple and convenient to install, on the other hand, the bottom plate can support the plug, so that the deformation of the plug is avoided and the sealing effect is affected. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0047] Figure 1 It is a structural schematic diagram of the embodiment one of the present application.

[0048] Figure 2 It is a structural schematic diagram of the embodiment one of the present application. Figure 1 It is an enlarged schematic diagram of D1 position.

[0049] Figure 3 It is a three-dimensional structural schematic diagram of the plug of the embodiment one.

[0050] Figure 4 It is a structural schematic diagram of the manifold block, the plug and the base in the embodiment two of the present application.

[0051] Figure 5 It is a structural schematic diagram of the embodiment three provided by the present application.

[0052] Figure 6 It is a structural schematic diagram of the embodiment three provided by the present application. Figure 5 It is an enlarged schematic diagram of D2 position.

[0053] Figure 7 It is a structural schematic diagram of the embodiment four of the present application.

[0054] BRIEF DESCRIPTION OF DRAWINGS

[0055] 1, manifold block; 2, flow channel; 21, liquid inlet flow channel; 22, first section; 221, first communication port; 23, expansion cavity; 231, inclined side wall; 24, second section; 241, second communication port; 25, liquid outlet flow channel; 3, cover body; 301, driving chamber; 31, upstream side cover body; 311, first cover; 312, second cover; 32, downstream side cover body; 4, valve cavity; 41, upstream side valve cavity; 42, downstream side valve cavity; 5, valve core component; 51, upstream side valve core component; 511, upper diaphragm; 512, upper valve core; 52, downstream side valve core component; 521, diaphragm; 522, valve core; 6, driving component; 61, upstream side driving component; 611, piston; 612, first hole; 613, second hole; 614, elastic member; 62, downstream side driving component; 621, connecting rod; 622, driving sleeve rod; 7, shaped opening; 71, second annular protrusion; 8, bottom plate; 9, plug; 91, main body; 92, first annular protrusion; 93, extension; 931, top end face; 10, first annular groove; 11, second annular groove; 12, valve seat. DETAILED DESCRIPTION

[0056] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0057] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or 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; it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0059] Referring toFigures 1 to 3 The utility model embodiment provides a kind of combination valve, including manifold block 1, cover 3, valve cavity 4, valve core component 5 and driving component 6.Thereinto, the inside of manifold block 1 is provided with flow channel 2;Cover 3 is installed at the top end of manifold block 1, so that cover 3 and manifold block 1 can form the installation area of driving component 6 between;Valve cavity 4 is arranged in manifold block 1 and is communicated with flow channel 2, and the side of valve cavity 4 towards cover 3 is provided as opening portion;Valve core component 5 seals opening portion, and can be active in valve cavity 4 to change the fluid state in valve cavity 4;Driving component 6 is at least partially installed in cover 3, and driving component 6 is connected with valve core component 5, to drive valve core component 5 to move.

[0060] Specifically, cover 3 press-bonds the periphery of valve core component 5 at the periphery of opening portion, and driving component 6 is installed on cover 3, that is, driving component 6 is connected with the side of valve core assembly 5 deviating from valve cavity 4, to further realize the isolation of driving component 6 and fluid in valve core assembly 5, so that driving component 6 can drive valve core component 5 to move to change the fluid state in valve cavity 4, and will not contact with fluid in valve cavity 4 to affect fluid.

[0061] It is not difficult to understand that when the valve module in the combination valve is all open-close valve, driving component 6 drives valve core component 5 to move up at this time, and driving component 6 will drive valve core assembly 5 to move up and conduct valve cavity 4 and flow channel 2, and there is fluid flow in manifold block 1;And when driving component 6 drives valve core assembly 5 to move down and cut off valve cavity 4 and flow channel 2, there is no fluid flow in manifold block 1.Of course, in other embodiments, the valve module in the combination valve can also be flow regulating valve, back suction valve and other valve body.

[0062] For the convenience of description, with Figure 1 The "upper" marked in the direction is the upper side direction, that is, the side direction away from the bottom plate 8 is the upper side direction, so that Figure 1 The "lower" marked in the direction is the lower side direction, that is, the side direction close to the bottom plate 8 is the lower side direction.

[0063] Referring to Figure 1 Manifold block 1 is provided with two valve modules, namely upstream side valve module and downstream side valve module, to form combination valve. And each valve module includes cover 3, valve cavity 4, valve core component 5 and driving component 6, that is, cover 3, valve cavity 4, valve core component 5 and driving component 6 are provided with two.

[0064] Specifically, in the upstream side valve module, the cover 3 is set as an upstream side cover 31, the valve cavity 4 is set as an upstream side valve cavity 41, the valve core component 5 is set as an upstream side valve core component 51, and the driving component 6 is set as an upstream side driving component 61. Among them, the upstream side valve core component 51 is located in the upstream side valve cavity 41; the upstream side cover 31 is set as a split structure, specifically including a first cover 311 and a second cover 312, the first cover 311 is press-fitted on one side of the upstream side valve core component 51, and the second cover 312 is press-fitted on the upper end of the first cover 311 to form a driving cavity 301; the upstream side driving component 61 includes a piston 611, a first hole 612, a second hole 613 and an elastic element 614, the lower end of the piston 611 is connected with the upstream side valve core component 51, and is sealingly and slidingly installed in the driving cavity 301 to divide the driving cavity 301 into two parts, the first hole 612 and the second hole 613 are respectively connected with the upper part of the driving cavity 301 and the lower part of the driving cavity 301, and the elastic element 614 is located between the end face of the piston 611 and the end face of the driving cavity 301.

[0065] It is not difficult to understand that the second hole 613 is communicated with a gas source, when high-pressure gas is introduced into the lower part of the driving cavity 301 from the second hole 613, at this time, the pressure of the lower part of the driving cavity 301 increases, and will push the piston 611 to move upward, the elastic element 614 is compressed, and the upper part of the driving cavity 301 is communicated with the outside environment through the first hole 612 to balance the pressure of the upper part of the driving cavity 301. When the gas pressure of the lower part of the driving cavity 301 decreases, at this time, the elastic element 614 will push the piston 611 to move downward. During the upward and downward movement of the piston 611, the upstream side valve core component 51 will be driven to move upward and downward. Of course, in other embodiments, the upstream side valve module can also be driven by an electric or manual mode.

[0066] Specifically, in the downstream side valve module, the cover 3 is a downstream side cover 32, the valve cavity 4 is a downstream side valve cavity 42, the valve core component 5 is a downstream side valve core component 52, and the driving component 6 is set as a downstream side driving component 62. Among them, the downstream side valve core component 52 is located in the downstream side valve cavity 42; the downstream side cover 32 is set as a split structure; the downstream side driving component 62 includes a connecting rod 621 and a driving sleeve rod 622, the lower end of the connecting rod 621 is connected with the downstream side valve core component 52, the outer wall surface of the connecting rod 621 is threadedly connected with the inner wall surface of the driving sleeve rod 622, and the driving sleeve rod 622 is rotationally and matchingly connected with the downstream side cover 32.

[0067] It is understandable that the upward or downward adjustment of the connecting rod 621 can be achieved by rotating the driving sleeve rod 622, and then the upward or downward movement of the downstream valve core component 52 can be controlled. In the remaining embodiments, the downstream valve module can also have a remaining manual driving structure, or a pneumatic driving structure, or an electric driving structure to control the movement of the valve core.

[0068] Of course, in other embodiments, the combined valve can also include three, four or more valve modules, and the corresponding valve cavity 4, cover 3, valve core component 5 and driving component 6 can also be provided with three, four or more, and the remaining valve modules do not require to be arranged in series with the upstream valve module and the downstream valve module.

[0069] Referring to Figures 1 to 3 The valve core component 5 cooperating with the downstream valve cavity 42 (i.e. the downstream valve core component 52) includes a diaphragm 521 and a valve core 522, the diaphragm 521 is arranged at the ring side of the valve core 522 and is used to seal the opening of the downstream valve cavity 42; wherein the downstream valve cavity 42 has a valve seat 12, and the valve seat 12 is arranged at the outlet end of the second section 24, and the valve core 522 can seal the valve seat 12 to disconnect the downstream valve cavity 42 from the second section 24.

[0070] It is understandable that when the valve core 522 in the downstream valve cavity 42 is in the closed state, the downstream valve cavity 42 will not be communicated with the expansion chamber 23, thereby ensuring that the diaphragm 521 of the downstream valve will not be subjected to high fluid pressure inside the downstream valve cavity 42, thereby avoiding the diaphragm 521 being easily damaged due to being in a high pressure environment for a long time.

[0071] Further, the upstream valve core component 51 includes an upper diaphragm 511 and an upper valve core 512.

[0072] Referring to Figures 1 to 3 The flow channel 2 includes a liquid inlet flow channel 21, a first section 22, an expansion chamber 23, a second section 24 and a liquid outlet flow channel 25, the liquid inlet flow channel 21, the upstream valve cavity 41, the first section 22, the expansion chamber 23, the second section 24, the downstream valve cavity 42 and the liquid outlet flow channel 25 are sequentially connected in series, and the first section 22 and the second section 24 are at a certain angle, so that the fluid in the first section 22 continues to flow in the second section 24 in a different direction after passing through the expansion chamber 23.

[0073] It is understandable that during the process of fluid flowing from the first section 22 to the second section 24, the flow rate of the fluid will slow down after the fluid enters the expansion chamber 23 from the first section 22, and part of the kinetic energy will be converted into pressure energy. Thus, the fluid will not hit the side wall at the corner of the first section 22 and the second section 24 at a high flow rate, resulting in serious turbulence and causing energy loss and large flow resistance of the fluid at the corner.

[0074] Further, the bottom end of the expansion cavity 23 is provided with a shaped opening 7, and the expansion cavity 23 can be processed through the shaped opening 7, for example, injection molding or machining molding of the expansion cavity 23 is realized through the shaped opening 7.

[0075] Further, the bottom end of the manifold block 1 is provided with a bottom plate 8, which can be fixedly connected with the manifold block 1 or the cover 3, and the top end of the bottom plate 8 is provided with a plug 9 in cooperation, so that when the bottom plate 8 is fixedly connected with the manifold block 1, the plug 9 can be pressed at the shaped opening 7 and sealed.

[0076] This structure design, on the one hand, does not need to additionally set the fixing structure of the plug 9, so that the plug 9 is simple in structure and convenient to install, and on the other hand, the plug 9 can be supported by the bottom plate 8, so that when the plug 9 is sealed at the shaped opening 7, it is not affected by the fluid impact force or pressure in the expansion cavity 23, and the plug 9 itself is deformed to cause the sealing to be easily invalid.

[0077] The bottom plate 8 can be welded with the manifold block 1, or fixedly connected with the manifold block 1 through a bolt structure, or the bottom plate 8 is fixedly connected with the cover 3 through a bolt structure, and the manifold block 1 is clamped and fixed between the bottom plate 8 and the cover 3 to realize the fixed connection of the bottom plate 8 and the manifold block 1.

[0078] When the fluid in the valve body has strong corrosiveness or has high requirements for the cleanliness of the fluid, the material of the manifold block 1 can be set as a resin material, which can be PTFE, PFA and other fluororesin materials, so that the corrosion resistance of the manifold block 1 itself is high, so as not to affect the cleanliness of the fluid. However, in this case, the local pressure of the manifold block 1 itself will be prone to creep deformation, so at this time the hardness of the cover 3 and the bottom plate 8 can be set to be greater than that of the manifold block 1, so that the cover 3 and the bottom plate 8 are not prone to creep, and at this time the fixing mode of connecting the cover 3 and the bottom plate 8 through a bolt structure is selected. In this fixing mode, the manifold block 1 is pressed between the cover 3 and the bottom plate 8, and at this time the pressure receiving surface of the manifold block 1 is larger than the mode in which the bolt structure directly abuts against the manifold block 1, that is, the force on the manifold block 1 is more dispersed, so that the manifold block 1 is more not prone to creep deformation.

[0079] Among them, the plug 9 and the bottom plate 8 can be integrally formed, or fixedly connected, or separately provided.

[0080] Referring to Figures 1 to 3Preferably, the plug 9 and the bottom plate 8 are designed in a split structure, and the plug 9 is press-fitted in the forming opening 7 by the bottom plate 8 to seal the forming opening 7. In the split structure, the bottom plate 8 and the plug 9 can be machined separately, which is convenient for controlling the accuracy of the size of the plug 9, and the bottom plate 8 and the plug 9 can also be made of different materials to meet different functions.

[0081] Specifically, the plug 9 can be made of rubber or resin to realize the sealing of the forming opening 7 through elastic deformation and also have good corrosion resistance. The specific material of the plug 9 can be fluororubber, PTFE or PFA, etc. The bottom plate 8 can be made of a material with a hardness greater than that of the plug 9, such as metal or PP, PVDF, etc.

[0082] When the plug 9 is made of rubber or resin, the fluid in the expansion cavity 23 directly impacts on the plug 9, or the pressure in the expansion cavity 23 is large or changes sharply, which can easily cause the plug 9 to deform and affect the sealing effect of the plug 9 at the forming opening 7. The press-fitting of the bottom plate 8 to the plug 9 not only provides the required press-fitting force for sealing, but also supports the plug 9 to avoid deformation, thereby better guaranteeing the sealing effect of the plug 9.

[0083] Further, the split structure between the plug 9 and the bottom plate 8 can also make the actual installation more convenient. Specifically, the plug 9 is relatively difficult to install due to the relatively large resistance of the forming opening 7. Especially, the bottom plate 8 is larger than the plug 9, and if the plug 9 and the forming opening 7 are not positioned accurately during installation, the installation difficulty will be further increased. The split structure of the plug 9 and the bottom plate 8 allows the plug 9 to be aligned with the forming opening 7 in advance during installation, and then press-fitted in the forming opening 7 under the push of the bottom plate 8, which is conducive to the installation of the plug 9 and the forming opening 7, and can also avoid deformation of the plug 9 during installation, thereby guaranteeing the sealing performance of the plug 9 and the forming opening 7.

[0084] Referring to Figure 2 and Figure 3 , the top wall of the forming opening 7 is provided with a first annular groove 10 recessed upward, and the first annular groove 10 is annularly arranged outside the expansion cavity 23; the plug 9 comprises a main body 91 and a first annular protrusion 92 arranged on the main body 91, and the first annular protrusion 92 can be sealingly inserted into the first annular groove 10 to realize better sealing effect of the plug 9.

[0085] More specifically, the thickness of the first annular protrusion 92 can be slightly greater than the width of the first annular groove 10, so that the inner and outer sidewalls of the first annular protrusion 92 are press-fitted between the inner and outer sidewalls of the first annular groove 10, and the sealing effect between the first annular protrusion 92 and the first annular groove 10 is ensured by the interference fit; alternatively, the first annular protrusion 92 is axially press-fitted inside the first annular groove 10, so that the top end of the first annular protrusion 92 is in abutting sealing contact with the upper top wall of the first annular groove 10; of course, the inner and outer sidewalls of the first annular protrusion 92 can also be interference-fitted with the inner and outer sidewalls of the first annular groove 10, while the top end of the first annular protrusion 92 is in abutting sealing contact with the upper top surface of the first annular groove 10.

[0086] Further, the plug 9 includes an extension 93 extending from the main body 91 to the inside of the expansion cavity 23, and the extension 93 is in abutting contact with the inner wall of the expansion cavity 23. The abutting contact between the extension 93 and the inner wall of the expansion cavity 23 achieves further sealing, so that the plug 9 can better achieve the sealing effect and prevent the liquid in the expansion cavity 23 from leaking out of the forming opening 7.

[0087] It is worth noting that, with the top wall of the forming opening 7 (i.e., the plane where the one side port of the expansion cavity 23 is located) as a dividing line, the extension 93 is located above the plane, and the main body 91 is located below the plane.

[0088] In addition, due to the formation of the extension 93, the first annular protrusion 92, the main body 91, and the extension 93 form a second annular groove 11, and the top wall of the forming opening 7 forms a second annular protrusion 71 radially inside the first annular groove 10. The second annular protrusion 71 can be inserted into the second annular groove 11, so that the plug 9 and the forming opening 7 form a labyrinth sealing structure, which can further increase the sealing effect of the plug 9 on the expansion cavity 23.

[0089] In addition, the main body 91 itself can also abut against the top wall of the forming opening 7 to further improve the sealing effect.

[0090] Further, the extension 93 is a solid columnar structure, and the extension 93 is interference-fitted into the expansion cavity 23, so that the extension 93 is not easily deformed when subjected to the impact of the fluid, thereby ensuring the sealing effect between the extension 93 and the inner wall of the expansion cavity 23. If the extension 93 is hollow or has another structure, the extension 93 is easily deformed inwardly under the action of the fluid, which may result in poor sealing effect between the extension 93 and the inner wall of the expansion cavity 23.

[0091] Further, the expansion cavity 23 is a straight columnar cavity, the cross-sectional area and the height of the expansion cavity 23 are greater than the diameter of the first section 22, and the forming opening 7 is arranged at one end of the expansion cavity 23 along the axial direction. Thus, the expansion cavity 23 can be conveniently machined from the forming opening 7 or directly injection molded.

[0092] Referring to Figure 2 and Figure 3 , the top end surface 931 of the extension 93 is located below the first section 22 and the communication opening of the second section 24 and the expansion cavity 23.

[0093] Specifically, the communication opening includes a first communication opening 221 and a second communication opening 241, wherein the first communication opening 221 communicates the first section 22 and the expansion cavity 23, and the second communication opening 241 communicates the second section 24 and the expansion cavity 23.

[0094] Further, the center axis of the first section 22 and the center axis of the expansion cavity 23 form a certain angle, and the center axis of the second section 24 is parallel to or coincides with the center axis of the expansion cavity 23. At this time, the first communication opening 221 is located on the side of the second communication opening 241 close to the extension 93, and the top end surface 931 of the extension 93 is located below the first communication opening 221. Thus, the extension 93 can be prevented from protruding to the communication opening (specifically, the first communication opening 221) to block part of the communication opening area, and thus the structure dead angle at the communication opening can be avoided, which can prevent impurities or deposits from accumulating in the dead angle, thereby affecting the cleanliness of the fluid. At the same time, the extension 93 can also effectively prevent the setting of the blocked communication opening area from affecting the flow effect of the fluid between the first section 22, the expansion cavity 23, and the second section 24.

[0095] For ease of understanding, a reference datum plane Z is constructed, and a point A closest to the top end surface 931 of the extension 93 on the side of the first communication opening 221 is located on the reference datum plane Z, and the reference datum plane Z is parallel to the top end surface 931 of the extension 93. The top end surface 931 does not coincide with the datum plane Z, and the top end surface 931 is located on the side of the datum plane Z away from the center of the first communication opening 221.

[0096] In addition, it is also worth mentioning that, in order to facilitate installation, the edges of the extension 93, the edges of the expansion cavity 23, the edges of the 10, the edges of the 92, etc. are provided with chamfer structures. The edge size of the extension 93 can be controlled to be small, such as 1mm, 2mm, etc. during machining, which can facilitate installation and also avoid dead angles caused by chamfers. Of course, corresponding chamfer structures can also not be provided.

[0097] Embodiment Two

[0098] Referring to Figure 4The difference between this embodiment and embodiment one is that the central axis of the first section 22 and the central axis L of the expansion cavity 23, and the central axis of the second section 24 and the central axis L of the expansion cavity 23 are all at an angle.

[0099] Similarly, in this embodiment, the top end face of the extension 92 is also located below the first communication port 221 of the first section 22 and the second communication port 241 of the second section 24.

[0100] Embodiment three

[0101] Referring to Figure 5 and Figure 6 The difference between this embodiment and embodiment one is that the expansion cavity 23 is a circular truncated cone chamber, and the diameter of the expansion cavity 23 is narrow at the top and wide at the bottom.

[0102] Further, the minimum diameter of the cross-sectional area of the expansion cavity 23 is greater than the diameter of the first section 22, and the forming opening 7 is arranged at one end of the expansion cavity 23 along the axis direction.

[0103] Further, the expansion cavity 23 has an inclined side wall 231 which is inclined and arranged opposite to the bottom plate 8; and a part (specifically, the extension 93) of the plug 9 is press-fitted between the inclined side wall 231 and the bottom plate 8. At this time, the outer wall surface of the extension 93 of the plug 9 is also inclined, so that after the force of the bottom plate 8 is transmitted to the plug 9, the force has a component in the direction perpendicular to the inclined side wall 231, so that the abutting force between the inclined side wall 231 and the plug 9 can be increased, thereby improving the sealing effect between the plug 9 and the inclined side wall 231 of the expansion cavity 23.

[0104] That is, the above structure can increase the press-fitting force between the plug 9 and the inclined side wall 231 of the expansion cavity 23 by the pressing of the bottom plate 8 on the plug 9, thereby improving the sealing effect.

[0105] Thus, it can be avoided that in embodiment one, when the expansion cavity 23 is a straight cylindrical chamber, the abutting force between the plug 9 and the expansion cavity 23 is only provided by the interference fit therebetween, and the force of the bottom plate 8 on the plug 9 cannot increase the press-fitting force.

[0106] Referring to Figure 6 In order to facilitate understanding of the arrangement between the inclined side wall 231 and the bottom plate 8, a reference line L1 and a reference line L2 are constructed in the cross-sectional view, wherein L1 is perpendicular to the bottom plate 8 and passes through the lower intersection point J1 of the inclined side wall 231 and the extension 93, and L2 is perpendicular to the bottom plate 8 and passes through the upper intersection point J2 of the inclined side wall 231 and the extension 93. At this time, L1 is located on the outer side of L2 (the radial direction of the extension 93), that is, from bottom to top, the distance between the central axis of the inclined side wall 231 and the extension 93 becomes smaller and smaller.

[0107] Example four

[0108] The difference from example three is that the part of the inner wall of the expansion cavity 23 abutting against the plug 9 is in a structure of being narrow at the top and wide at the bottom, and the part of the inner wall of the expansion cavity 23 abutting against the plug 9 is in a structure of being straight and columnar at the top. Figure 7

[0109] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall belong to the scope of protection required by the present application.​

Claims

1. A combination valve, comprising: a manifold block, internally provided with a flow channel; a cover body, mounted on the top end of the manifold block; valve cavities, provided in the manifold block and communicated with the flow channel, the side of the valve cavities facing the cover body being provided as an open part; a valve core component, sealing the open part and movable in the valve cavities to change the fluid state in the valve cavities; a driving component, at least partially mounted in the cover body, the driving component being connected with the valve core component to drive the valve core component to move; characterized in that: the valve cavities are provided in plurality and include upstream-side valve cavities and downstream-side valve cavities; the flow channel includes an inlet flow channel, a first section, an expansion cavity, a second section and an outlet flow channel; the inlet flow channel, the upstream-side valve cavities, the first section, the expansion cavity, the second section, the downstream-side valve cavities and the outlet flow channel are sequentially and serially communicated, and the first section and the second section are at a certain angle, so that the fluid in the first section continues to flow in the second section in a different direction after passing through the expansion cavity; the bottom end of the expansion cavity is provided with a shaped opening; the bottom end of the manifold block is provided with a bottom plate, the bottom plate being fixedly connected with the manifold block or the cover body, the top end of the bottom plate being provided with a plug in cooperation, the plug being capable of sealing the shaped opening.

2. The combination valve of claim 1, wherein the plug and the bottom plate are provided in a split body, and the plug is press-fitted in the shaped opening by the bottom plate to seal the shaped opening.

3. The combination valve of claim 2, wherein, a first annular groove is provided on the top wall of the shaped opening and recessed upward, the first annular groove being annularly arranged outside the expansion cavity; the plug includes a main body and a first annular protrusion provided on the main body, the first annular protrusion being capable of being inserted into the first annular groove.

4. The combination valve of claim 3, wherein the plug includes an extension part extending from the main body to the inside of the expansion cavity, the extension part being abutted with the inner wall of the expansion cavity; wherein a second annular groove is formed between the first annular protrusion, the main body and the extension part, a second annular protrusion is formed on the top wall of the shaped opening radially inside the first annular groove, and the second annular protrusion is capable of being inserted into the second annular groove.

5. The combination valve of claim 4, wherein, the extension part is a solid columnar structure, and the extension part is press-fitted into the inside of the expansion cavity.

6. The combination valve of claim 5, wherein, the top end surface of the extension part is located below the communication port between the first section and the second section and the expansion cavity.

7. The combination valve of claim 2, wherein, the expansion cavity has an inclined side wall which is inclined and oppositely arranged with the bottom plate; wherein part of the plug is press-fitted between the inclined side wall and the bottom plate.

8. The combination valve of claim 2, wherein, the expansion cavity is a straight columnar cavity, the cross-sectional area and the height of the expansion cavity are greater than the diameter of the first section, and the shaped opening is arranged at one end of the expansion cavity along the axial direction; or, the expansion cavity is a circular truncated cone cavity, the minimum diameter of the cross-sectional area of the expansion cavity is greater than the diameter of the first section, and the shaped opening is arranged at one end of the expansion cavity along the axial direction.

9. The combination valve of claim 1, wherein, the valve core component matched with the downstream-side valve cavity includes a diaphragm and a valve core, the diaphragm being arranged on the ring side of the valve core and used to seal the open part of the downstream-side valve cavity; wherein the downstream-side valve cavity has a valve seat and is annularly arranged at the outlet end of the second section, and the valve core is capable of sealing the valve seat to disconnect the downstream-side valve cavity from the second section.

10. The combination valve of claim 2, wherein, The manifold block is made of resin material, and the hardness of the cover and the bottom plate is greater than the hardness of the manifold block, the cover and the bottom plate are connected by bolts, and the manifold block is compressed between the cover and the bottom plate. And / or, the plug is made of rubber or resin material, and the hardness of the bottom plate is greater than the hardness of the plug.

Images