Liquid Flow Controller

Abstract

The present invention relates to the technical field of fluid control, and more particularly, to a liquid flow controller. The liquid flow controller includes a liquid seat, a connection seat, a sealing shaft, a sealing ring, a liquid diaphragm, and a pneumatic component; the liquid seat is connected to the connection seat; the liquid diaphragm is connected to the liquid seat or the connection seat, and the liquid diaphragm and the liquid seat jointly define a liquid guiding cavity; the liquid seat is provided with a liquid inlet and a liquid outlet communicating with the liquid guiding cavity; the sealing ring is arranged at the liquid inlet, and the sealing shaft is movably arranged at the liquid inlet; the pneumatic component is connected to the connection seat and is in transmission connection with the sealing shaft; wherein, the pneumatic component is used to drive the sealing shaft to move relative to the liquid inlet so as to block or conduct the liquid inlet and the liquid guiding cavity, or change the size of the fluid passage, thereby adjusting the flow rate. This liquid flow controller is applicable to the flow rate adjustment of various fluid types, is easier to clean, and can effectively reduce the pressure fluctuation of the liquid, making the fluid flow rate at the liquid outlet more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and more particularly, to a liquid flow controller. Background Art

[0002] In low-pressure fluid control applications, there is a wide variety of fluids. For fluids with different viscosities, different flow ranges, and whether they are abrasive, it is difficult for a single flow regulating valve to be compatible with all of them. At this time, different fluid controls require different structural designs to meet the changing application requirements. However, most of the current flow controllers on the market have a single structure and are only suitable for low-viscosity fluids and non-abrasive liquids, with a very narrow application range. Moreover, there is a spring in the fluid pipeline part, making it difficult to clean. Summary of the Invention

[0003] The objectives of the present invention include, for example, providing a liquid flow controller with a simple structure, convenient use, a wide application range, suitable for flow regulation of various fluid types, a simple and smooth internal structure that is not prone to generating large shear stresses, easier to clean, and capable of effectively reducing the pressure fluctuation of the liquid, making the fluid flow rate at the liquid outlet more stable.

[0004] Embodiments of the present invention may be implemented as follows:

[0005] The present invention provides a liquid flow controller, which includes a liquid seat, a connection seat, a sealing shaft, a sealing ring, a liquid diaphragm, and a pneumatic component;

[0006] The liquid seat is connected to the connection seat; the liquid diaphragm is connected to the liquid seat or the connection seat, and the liquid diaphragm and the liquid seat jointly define a liquid guiding cavity; the liquid seat is provided with a liquid inlet and a liquid outlet that communicate with the liquid guiding cavity; the sealing ring is arranged at the liquid inlet, and the sealing shaft is movably arranged at the liquid inlet; the pneumatic component is connected to the connection seat and is in transmission connection with the sealing shaft;

[0007] Wherein, the pneumatic component is used to drive the sealing shaft to move relative to the liquid inlet, so that the sealing shaft abuts against the sealing ring, thereby blocking the liquid inlet from the liquid guiding cavity, or making the sealing shaft spaced from the sealing ring, thereby conducting the liquid inlet to the liquid guiding cavity.

[0008] In an alternative embodiment, a part of the sealing shaft extends towards the direction of the liquid guiding cavity and passes through the liquid diaphragm to be connected to the pneumatic component.

[0009] In an alternative embodiment, the pneumatic component includes a gas diaphragm and a movable member;

[0010] The connection seat is provided with a movable channel and a pressure regulating port. The gas diaphragm is arranged in the movable channel and jointly forms a pressure cavity with the inner wall of the connection seat; the pressure regulating port communicates with the pressure cavity;

[0011] The movable member is movably arranged in the movable channel, the movable member abuts against the gas diaphragm and is located on a side of the gas diaphragm close to the liquid diaphragm; the movable member is connected to the sealing shaft;

[0012] The air pressure regulating port is used to introduce gas to increase the pressure in the air pressure chamber, thereby driving the sealing shaft connected to the movable part to move toward the open liquid inlet.

[0013] In an optional embodiment, the pneumatic component further includes a reset member, which is disposed in the movable channel and connected to the movable member, and is used to allow the sealing shaft to have a tendency to move in a direction to block the liquid inlet.

[0014] In an optional embodiment, the movable member includes a spring pressure plate and a diaphragm fixing plate;

[0015] The spring pressing piece is in contact with the gas diaphragm, and the reset piece is connected with the spring pressing piece; the diaphragm fixing piece is connected with the spring pressing piece and clamps the liquid diaphragm.

[0016] In an optional embodiment, the active channel includes a first segment, a second segment and a third segment, the first segment, the second segment and the third segment are arranged in sequence from the gas diaphragm to the liquid diaphragm, and are interconnected; wherein the diameter of the second segment is smaller than the diameters of the first segment and the third segment;

[0017] The gas diaphragm is accommodated in the first segment, and the reset member is accommodated in the second segment; the spring pressing plate is movably arranged in the first segment and the second segment; part of the diaphragm fixing plate is accommodated in the second segment, and the remaining part is located in the third segment, and the part of the diaphragm fixing plate accommodated in the second segment and the spring pressing plate.

[0018] In an optional embodiment, a limiting platform is provided in the second segment, and the reset member abuts against a side of the limiting platform facing away from the liquid diaphragm.

[0019] In an optional embodiment, the portion of the diaphragm fixing plate accommodated in the second segment is provided with an abutting portion abutting against an end of the third segment facing the liquid diaphragm.

[0020] In an optional embodiment, the sealing shaft includes a first subsection and a second subsection arranged along the axial direction thereof;

[0021] The first sub-portion is used to abut against the sealing ring, and the second sub-portion is connected to the pneumatic component;

[0022] The first section is provided with a conical surface abutting against the sealing ring.

[0023] In an optional embodiment, an annular groove is formed on a side of the liquid seat facing the connecting seat, and the annular groove and the liquid diaphragm together define the liquid guiding cavity.

[0024] The beneficial effects of the embodiments of the present invention include:

[0025] The liquid flow controller includes a liquid seat, a connection seat, a sealing shaft, a sealing ring, a liquid diaphragm and a pneumatic component; the liquid seat is connected to the connection seat; the liquid diaphragm is connected to the liquid seat or the connection seat, and the liquid diaphragm and the liquid seat jointly define a liquid guiding cavity; the liquid seat is provided with a liquid inlet and a liquid outlet that communicate with the liquid guiding cavity; the sealing ring is arranged at the liquid inlet, and the sealing shaft is movably arranged at the liquid inlet; the pneumatic component is connected to the connection seat and is in transmission connection with the sealing shaft; wherein, the pneumatic component is used to drive the sealing shaft to move relative to the liquid inlet so that the sealing shaft abuts against the sealing ring, thereby blocking the liquid inlet from the liquid guiding cavity, or, making the sealing shaft and the sealing ring spaced apart, thereby making the liquid inlet communicate with the liquid guiding cavity.

[0026] The liquid flow controller has a simple structure, is convenient to use, and has a wide application range. It is suitable for the flow regulation of various fluid types. Its internal structure is simple and smooth, not easily generating large shear stresses, and is easier to clean. At the same time, it can effectively reduce the pressure fluctuation of the liquid, making the fluid flow velocity at the liquid outlet more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of the liquid flow controller in the embodiments of the present invention;

[0029] Figure 2 It is a cross-sectional view of the liquid flow controller in the embodiments of the present invention;

[0030] Figure 3 It is a cross-sectional view of the pneumatic component and the connection seat in the embodiments of the present invention;

[0031] Figure 4 It is a schematic structural diagram of the sealing shaft in the embodiments of the present invention; wherein, A is a schematic structural diagram when the conical surface of the sealing shaft is a long conical surface, and B is a schematic structural diagram when the conical surface of the sealing shaft is a short conical surface;

[0032] Figure 5 It is a cross-sectional view of the connection seat in the embodiments of the present invention.

[0033] Icons: 100 - Liquid flow controller; 110 - Liquid seat; 120 - Connecting seat; 130 - Sealing shaft; 140 - Sealing ring; 150 - Liquid diaphragm; 160 - Pneumatic component; 101 - Liquid guiding cavity; 111 - Liquid inlet; 112 - Liquid outlet; 131 - First part; 132 - Second part; 133 - Conical surface; 113 - Annular groove; 161 - Gas diaphragm; 162 - Movable part; 121 - Movable channel; 122 - Air pressure adjustment port; 102 - Air pressure cavity; 163 - Reset part; 164 - Spring pressing piece; 165 - Diaphragm fixing piece; 123 - First segment; 124 - Second segment; 125 - Third segment; 126 - Top cover; 127 - Limiting platform; 166 - Abutting part. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0036] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present invention is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0039] It should be noted that the features in the embodiments of the present invention can be combined with each other without conflict.

[0040] Please refer toFigures 1 - 3 , in this embodiment, a liquid flow controller 100 is provided. The liquid flow controller 100 includes a liquid seat 110, a connection seat 120, a sealing shaft 130, a sealing ring 140, a liquid diaphragm 150, and a pneumatic assembly 160;

[0041] The liquid seat 110 is connected to the connection seat 120; the liquid diaphragm 150 is connected to the liquid seat 110 or the connection seat 120, and the liquid diaphragm 150 and the liquid seat 110 jointly define a liquid guiding cavity 101; the liquid seat 110 is provided with a liquid inlet 111 and a liquid outlet 112 that communicate with the liquid guiding cavity 101, and the liquid inlet 111 and the liquid outlet 112 are perpendicularly arranged; the sealing ring 140 is arranged at the liquid inlet 111, and the sealing shaft 130 is movably arranged at the liquid inlet 111; the pneumatic assembly 160 is connected to the connection seat 120, and the pneumatic assembly 160 is in transmission connection with the sealing shaft 130;

[0042] Wherein, the pneumatic assembly 160 is used to drive the sealing shaft 130 to move relative to the liquid inlet 111, so that the sealing shaft 130 abuts against the sealing ring 140, thereby blocking the liquid inlet 111 from the liquid guiding cavity 101, or, making the sealing shaft 130 spaced from the sealing ring 140, thereby making the liquid inlet 111 communicate with the liquid guiding cavity 101.

[0043] Please refer to Figures 1 - 3 , the working principle of the liquid flow controller 100 is as follows:

[0044] The liquid flow controller 100 includes a liquid seat 110, a connection seat 120, a sealing shaft 130, a sealing ring 140, a liquid diaphragm 150, and a pneumatic assembly 160; wherein, the liquid seat 110 is connected to the connection seat 120; the liquid diaphragm 150 is connected to the liquid seat 110 or the connection seat 120, and the liquid diaphragm 150 and the liquid seat 110 jointly define a liquid guiding cavity 101; the liquid seat 110 is provided with a liquid inlet 111 and a liquid outlet 112 that communicate with the liquid guiding cavity 101; and the sealing ring 140 is arranged at the liquid inlet 111, and the sealing shaft 130 is movably arranged at the liquid inlet 111; the pneumatic assembly 160 is connected to the connection seat 120, and the pneumatic assembly 160 is in transmission connection with the sealing shaft 130; thus, through such a setting method, the pneumatic assembly 160 can be used to drive the sealing shaft 130 to move relative to the liquid inlet 111, and then, during the movement of the sealing shaft 130, the liquid inlet 111 is opened to communicate the liquid inlet 111 with the liquid guiding cavity 101, or the liquid inlet 111 is closed to block the liquid inlet 111 from the liquid guiding cavity 101, so that the control of the diversion flow rate of the feed inlet can be realized by controlling the movement of the sealing shaft 130;

[0045] Moreover, when setting the liquid flow controller 100, since the liquid diaphragm 150 and the liquid seat 110 are used together to define the liquid guiding cavity 101 inside it, thus, during the process of guiding the liquid, the liquid diaphragm 150 can play a role in reducing the pressure fluctuation of the liquid, and further make the fluid flow velocity at the liquid outlet 112 more stable;

[0046] Moreover, since the pneumatic component 160 is used to control the movement of the sealing shaft 130, thus, through the movement of the pneumatic component 160, the movement of the sealing shaft 130 can be accurately controlled, so that the conduction flow rate can be accurately controlled, and the number of structures located in the liquid guiding cavity 101 can be reduced, thereby optimizing the internal structure of the liquid flow controller 100, making its internal structure simple and smooth, not easily generating large shear stresses, and at the same time being easier to clean, and being applicable to the flow rate adjustment of various fluid types.

[0047] In this embodiment, in order to reduce the number of structures located in the liquid guiding cavity 101 and make the inside of the liquid guiding cavity 101 smooth and not easily generate large shear stresses, a circular groove 113 is opened on one side of the liquid seat 110 facing the connecting seat 120, and the circular groove 113 and the liquid diaphragm 150 together define the liquid guiding cavity 101.

[0048] Please refer to Figures 1 - 4 When setting the sealing shaft 130, the sealing shaft 130 includes a first part 131 and a second part 132 arranged along its axis; the first part 131 is used to abut against the sealing ring 140, and the second part 132 is connected to the pneumatic component 160; wherein, a conical surface 133 for abutting against the sealing ring 140 is provided on the first part 131. By such a setting method, the size parameters of the conical surface 133 of the first part 131 of the sealing shaft 130 can be adjusted to be suitable for the flow rate adjustment of different types of fluids. For example, in this embodiment, the sealing shaft 130 has two conical surface forms, namely a long conical surface (as shown in Figure A in Figure 4 ) and a short conical surface (as shown in Figure B in Figure 4 ), the long conical surface is responsible for the flow rate adjustment of small flow rates or low viscosities, and the short conical surface is responsible for the flow rate adjustment of high flow rates or high viscosities;

[0049] In addition, the hardness of the sealing shaft 130 can also be adjusted to make it suitable for the flow rate adjustment of different types of fluids; for example, the sealing shafts 130 with high hardness and low hardness are respectively responsible for the flow rate adjustment of abrasive liquids and ordinary liquids.

[0050] Furthermore, please refer to Figures 1 - 5In this embodiment, when the sealing shaft 130 is set, since the liquid guiding cavity 101 is formed by the liquid diaphragm 150 and the liquid seat 110, and the pneumatic component 160 and the liquid inlet 111 are distributed on opposite sides of the liquid guiding cavity 101, and the pneumatic component 160 is located outside the liquid guiding cavity 101, so that the sealing shaft 130 can be connected with the pneumatic component 160 in a transmission manner, a part of the sealing shaft 130 extends toward the direction of the liquid guiding cavity 101, and passes through the liquid diaphragm 150 to connect with the pneumatic component 160. That is, a part of the sealing shaft 130 extends toward the direction of the liquid guiding cavity 101 into the liquid guiding cavity 101, and after passing through the liquid diaphragm 150, it is connected with the pneumatic component 160 located outside the liquid guiding cavity 101; thus, through such a setting, the number of structures located in the liquid guiding cavity 101 can be reduced.

[0051] For further information, please refer to Figures 1 - 5 In this embodiment, in order to enable the pneumatic assembly 160 to drive the sealing shaft 130 to move, when the pneumatic assembly 160 is set, the pneumatic assembly 160 includes a gas diaphragm 161 and a movable part 162;

[0052] The connection seat 120 is provided with an active channel 121 and an air pressure regulating port 122. The gas diaphragm 161 is arranged in the active channel 121 and forms an air pressure chamber 102 together with the inner wall of the connection seat 120. The air pressure regulating port 122 is communicated with the air pressure chamber 102.

[0053] The movable member 162 is movably disposed in the movable channel 121 , the movable member 162 abuts against the gas diaphragm 161 , and is located on a side of the gas diaphragm 161 close to the liquid diaphragm 150 ; the movable member 162 is connected to the sealing shaft 130 ;

[0054] The air pressure regulating port 122 is used to introduce air to increase the pressure in the air pressure chamber 102 , thereby driving the sealing shaft 130 connected to the movable member 162 to move toward the direction of the open liquid inlet 111 .

[0055] Thus, in this way, it can be connected to the air pressure regulating port 122 through an external air pressure pipeline. Furthermore, by injecting gas into the air pressure chamber 102, the pressure in the air pressure chamber 102 can be increased. Thus, after the pressure in the air pressure chamber 102 increases, the volume in the air pressure chamber 102 will increase, and then the gas diaphragm 161 will deform, and the direction of its deformation is towards the liquid guiding chamber 101. Furthermore, the deformation of the gas diaphragm 161 can drive the movable member 162 in contact with the gas diaphragm 161 to move towards the liquid guiding chamber 101. Thus, during the movement of the movable member 162, the sealing shaft 130 connected to the movable member 162 can be driven to move. At this time, since the movement direction of the sealing shaft 130 driven by the movable member 162 is from the air pressure chamber 102 direction to the liquid guiding chamber 101 direction, at this time, the movement of the sealing shaft 130 will open the liquid inlet 111, that is, connect the liquid inlet 111 to the liquid guiding chamber 101. During this process, it should be noted that by adjusting the amount of gas in the introduced gas chamber, the pressure in the air pressure chamber 102 can be controlled hollowly, and then the deformation amount of the gas diaphragm 161 can be controlled, so that the movement stroke of the movable member 162 in the movement channel 121 can be controlled. Thus, the movement stroke of the sealing shaft 130 can be controlled, and then the on-off flow rate between the liquid inlet 111 and the liquid guiding chamber 101 can be adjusted.

[0056] It should also be noted that, as can be seen from the above content, by introducing gas into the air pressure chamber 102, the sealing shaft 130 can be driven to move in the direction of connecting the liquid inlet 111 to the liquid guiding chamber 101, and the on-off flow rate between the liquid inlet 111 and the liquid guiding chamber 101 can be adjusted. When the pressure in the air pressure chamber 102 decreases, in order to make the sealing shaft 130 move in the direction of blocking the liquid inlet 111, therefore, the pneumatic component 160 further includes a reset member 163. The reset member 163 is arranged in the movement channel 121 and is connected to the movable member 162. The reset member 163 is used to make the sealing shaft 130 have a tendency to move in the direction of blocking the liquid inlet 111. Thus, through the setting of the reset member 163, when the air pressure in the air pressure chamber 102 decreases, the movable member 162 can drive the sealing shaft 130 to move in the direction of the liquid guiding chamber 101 under the action of the elastic restoring force of the reset member 163, and then the liquid inlet 111 is blocked; similarly, when gas is introduced into the air pressure chamber 102 to drive the sealing shaft 130 to move in the direction of connecting the liquid inlet 111 to the liquid guiding chamber 101, the elastic force of the reset member 163 needs to be overcome.

[0057] Based on the above structural setting of the reset member 163, please refer to Figures 1 - 5, in this embodiment, the movable member 162 includes a spring pressing piece 164 and a diaphragm fixing piece 165; the spring pressing piece 164 abuts against the gas diaphragm 161, and the reset member 163 is connected to the spring pressing piece 164; the diaphragm fixing piece 165 is connected to the spring pressing piece 164 and clamps the liquid diaphragm 150. Among them, when setting the spring pressing piece 164, since the spring pressing piece 164 abuts against the gas diaphragm 161, the reset member 163 is connected to the spring pressing piece 164, and the diaphragm fixing piece 165 is connected to the spring pressing piece 164. Therefore, when connecting the sealing shaft 130 to the movable member 162, the sealing shaft 130 can be connected to the spring pressing piece 164 or the diaphragm fixing piece 165; in addition, after the pressure in the air pressure chamber 102 increases, it will cause the volume in the air pressure chamber 102 to increase, and then cause the gas diaphragm 161 to deform, and the direction of its deformation is towards the liquid guiding chamber 101. Furthermore, the deformation of the gas diaphragm 161 can drive the spring pressing piece 164 abutting against the gas diaphragm 161 to move towards the liquid guiding chamber 101, overcoming the elastic force of the reset member 163, and then driving the sealing shaft 130 connected to the spring pressing piece 164 or the diaphragm fixing piece 165 to move.

[0058] It should be noted that the size of the spring pressing piece 164 needs to be selected according to the size of the outlet liquid pressure. A larger diameter spring pressing piece 164 needs to be selected for a high outlet pressure. When setting the diaphragm fixing piece 165, in order to enable the diaphragm fixing piece 165 to clamp the liquid diaphragm 150, the diaphragm fixing piece 165 can be made in a split manner, so that the diaphragm fixing piece 165 includes multiple sub-bodies, and the multiple sub-bodies are distributed on both sides of the liquid diaphragm 150, and the sub-bodies on both sides are connected to each other, so as to be able to position and fix the liquid diaphragm 150.

[0059] Furthermore, please refer to Figures 1 - 5 , when adopting the pneumatic component 160 in the above content, in order to enable the pneumatic component 160 to move in the connection seat 120, the movable channel 121 includes a first segment 123, a second segment 124, and a third segment 125. The first segment 123, the second segment 124, and the third segment 125 are arranged in sequence from the gas diaphragm 161 to the liquid diaphragm 150 and are in communication with each other; among them, the diameter of the second segment 124 is smaller than the diameters of the first segment 123 and the third segment 125; in addition, both ends of the movable channel 121 are open, that is, the first segment 123 and the second segment 124 are open, and a top cover 126 is connected to the open end of the first segment 123. The top cover 126 is used to block the opening of the first segment 123, and the air pressure adjustment port 122 is opened on the top cover 126, and the third segment 125 is adjacent to the liquid diaphragm 150;

[0060] The gas diaphragm 161 is accommodated in the first segment 123, and the reset member 163 is accommodated in the second segment 124; the spring pressing piece 164 is movably arranged in the first segment 123 and the second segment 124; part of the diaphragm fixing piece 165 is accommodated in the second segment 124, and the remaining part is located in the third segment 125, and the part of the diaphragm fixing piece 165 accommodated in the second segment 124 and the spring pressing piece 164.

[0061] Therefore, through such a setting, the change of the pressure of the gas chamber located in the first segment 123 can drive the spring pressure plate 164 to move in the first segment 123 and the second segment 124, and then drive the diaphragm fixing plate 165 connected to the spring pressure plate 164 to move in the third segment 125, and in the process can drive the sealing shaft 130 to move.

[0062] In the foregoing content, since the reset member 163 is arranged in the second segment 124, and the reset member 163 is used to make the sealing shaft 130 have a tendency to move in the direction of blocking the liquid inlet 111, that is, the reset member 163 is used to make the spring pressure plate 164 have a tendency to move from the third segment 125 toward the first segment 123, thus, a limiting platform 127 is arranged in the second segment 124, and the reset member 163 abuts against the side of the limiting platform 127 facing away from the liquid diaphragm 150.

[0063] For further information, please refer to Figures 1 - 5 In the present embodiment, since the diaphragm fixing sheet 165 clamps the liquid diaphragm 150, in order to restrict the movement of the liquid diaphragm 150, the portion of the diaphragm fixing sheet 165 accommodated in the second segment 124 is provided with an abutting portion 166 abutting against one end of the third segment 125 toward the liquid diaphragm 150. By abutting the diaphragm fixing sheet 165 against one end of the third segment 125 toward the liquid diaphragm 150, the movement of the diaphragm fixing sheet 165 can be restricted, thereby restricting the movement of the liquid diaphragm 150.

[0064] In summary, please refer to Figures 1 - 5 , the liquid flow controller 100 has the following advantages:

[0065] Reduce the maintenance difficulty and cost of components; indirectly control the size of liquid flow by simply controlling the size of gas pressure, and the control structure is simpler, safer and more reliable;

[0066] The existing flow controller is not suitable for abrasive liquids. The liquid flow controller 100 is suitable for flow control of abrasive liquids after improving the sealing structure, and can play a role in reducing fluid pressure fluctuations to a certain extent.

[0067] In the existing flow controller, there are springs and dead corners in the fluid pipeline, which are difficult to clean thoroughly during cleaning. The cavity of the liquid flow controller 100 is smooth without dead corners and there is no return spring, which is not easy to generate large shear stress. At the same time, it is easier to clean and prevent liquid residue during cleaning;

[0068] The adjustment interval sensitivity of the conventional flow controller is fixed. The liquid flow controller 100 can achieve a high adjustment interval for different outlet pressures by selecting different sealing shafts 130, sealing rings 140, spring pressing pieces 164 and reset parts 163;

[0069] The existing flow control has a very small flow adjustment range for high-viscosity liquids such as fluids with a viscosity higher than 10,000 CPS and is basically inapplicable. The liquid flow controller 100 realizes large-flow control of high-viscosity liquids through the improvement of the sealing structure, has a wider application range, and one structure can be applied in multiple fields.

[0070] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A liquid flow controller, characterized in that: The liquid flow controller includes a liquid seat, a connection seat, a sealing shaft, a sealing ring, a liquid diaphragm and a pneumatic component; The liquid seat is connected to the connection seat; the liquid diaphragm is connected to the liquid seat or the connection seat, and the liquid diaphragm and the liquid seat jointly define a liquid guiding cavity; the liquid seat is provided with a liquid inlet and a liquid outlet communicated with the liquid guiding cavity; the sealing ring is arranged at the liquid inlet, and the sealing shaft is movably arranged at the liquid inlet; the pneumatic component is connected to the connection seat and is in transmission connection with the sealing shaft; Wherein, the pneumatic component is used to drive the sealing shaft to move relative to the liquid inlet so that the sealing shaft abuts against the sealing ring, thereby blocking the liquid inlet and the liquid guiding cavity, or, making the sealing shaft spaced from the sealing ring, thereby making the liquid inlet and the liquid guiding cavity communicate; A part of the sealing shaft extends towards the liquid guiding cavity and passes through the liquid diaphragm to be connected with the pneumatic component; The pneumatic component includes a gas diaphragm and a moving part; the connection seat is provided with a moving channel and a pressure regulating port, the gas diaphragm is arranged in the moving channel and jointly forms a pressure cavity with the inner wall of the connection seat; the pressure regulating port is communicated with the pressure cavity; the moving part is movably arranged in the moving channel, the moving part abuts against the gas diaphragm and is located on the side of the gas diaphragm close to the liquid diaphragm; the moving part is connected with the sealing shaft; wherein, the pressure regulating port is used to introduce gas to increase the pressure in the pressure cavity, thereby driving the sealing shaft connected with the moving part to move towards the direction of opening the liquid inlet; The pneumatic component further includes a reset part, the reset part is arranged in the moving channel and is connected with the moving part, and the reset part is used to make the sealing shaft have a tendency to move towards the direction of blocking the liquid inlet.

2. The liquid flow controller according to claim 1, characterized in that: The moving part includes a spring pressing piece and a diaphragm fixing piece; The spring pressing piece abuts against the gas diaphragm, and the reset part is connected with the spring pressing piece; the diaphragm fixing piece is connected with the spring pressing piece and clamps the liquid diaphragm.

3. The liquid flow controller according to claim 2, characterized in that: The moving channel includes a first section, a second section and a third section, the first section, the second section and the third section are arranged in sequence from the gas diaphragm to the liquid diaphragm and are communicated with each other; wherein, the diameter of the second section is smaller than the diameters of the first section and the third section; The gas diaphragm is accommodated in the first section, the reset part is accommodated in the second section; the spring pressing piece is movably arranged in the first section and the second section; a part of the diaphragm fixing piece is accommodated in the second section, and the rest is located in the third section, and the part of the diaphragm fixing piece accommodated in the second section is connected with the spring pressing piece.

4. The liquid flow controller according to claim 3, characterized in that: A limiting platform is arranged in the second segment, and the resetting member abuts against a side of the limiting platform which is away from the liquid diaphragm.

5. The liquid flow controller according to claim 3, characterized in that: The portion of the diaphragm fixing plate accommodated in the second segment is provided with an abutting portion abutting against an end of the third segment facing the liquid diaphragm.

6. The liquid flow controller according to any one of claims 1 to 5, characterized in that: The sealing shaft comprises a first subsection and a second subsection arranged along the axial direction thereof; The first sub-portion is used to abut against the sealing ring, and the second sub-portion is connected to the pneumatic component; Wherein, the first section is provided with a conical surface abutting against the sealing ring.

7. The liquid flow controller according to any one of claims 1 to 5, characterized in that: An annular groove is formed on one side of the liquid seat facing the connecting seat, and the annular groove and the liquid diaphragm together define the liquid guiding cavity.

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