Flow rate adjusting unit and flow rate proportional adjusting device

Abstract

The utility model relates to the technical field of flow valves, and discloses a flow adjusting unit and a flow proportion adjusting device.The flow adjusting unit comprises a valve seat, the valve seat is provided with a flow inlet and a flow outlet, a first cavity and a second cavity are formed in the valve seat, one of the first cavity and the second cavity communicates with the flow inlet, and the other of the first cavity and the second cavity communicates with the flow outlet; the valve element is arranged in the first cavity; the flow limiting piece is installed in the second cavity, the flow limiting piece is provided with a flow limiting hole, and the valve element is inserted into the flow limiting hole; the driving assembly is used for driving the valve element to be close to and away from the flow limiting piece so that the first cavity and the second cavity can be disconnected and communicated. Therefore, after the fluid flows into the flow adjusting unit, the fluid is buffered in one cavity of the valve seat, after the fluid flows through the valve element, the fluid is buffered in the other cavity of the valve seat, and finally the fluid is discharged out of the flow adjusting unit, and compared with the prior art, turbulent flow generated by the fluid in the flow adjusting unit can be reduced.

Description

Technical Field

[0001] This application relates to the field of flow valve technology, and in particular to a flow regulating unit and a flow ratio regulating device. Background Technology

[0002] In gas welding and gas cutting processes, the flame generated by mixing gas fuel with an oxidizer can be used for welding or cutting objects. The concentration of the gas fuel and oxidizer in the gas mixture directly affects the flame temperature and stability, thus influencing the welding and cutting results. Therefore, before mixing the gas fuel and oxidizer, flow control valves can be installed in the gas fuel and / or oxidizer supply lines. These valves regulate the flow rate of the gas fuel and / or oxidizer, thereby adjusting their concentration in the gas mixture.

[0003] In related technologies, existing flow control valves have a flow channel connected between the inlet and outlet of the valve seat. The valve core is located inside the valve seat and is adapted to extend into the flow channel to block or connect the flow channel. When the flow control valve is not opened to its maximum, the fluid flow path is affected by the outer wall of the valve core when the fluid flows through the valve core, which will cause turbulence in the fluid within the flow control valve. This will cause fluctuations in the flow velocity and flow direction of the fluid in the delivery pipeline. When the fluid in the delivery pipeline is fuel gas or oxidant, the existing flow control valve will result in poor flame stability after igniting the mixture of fuel gas and oxidant, thus affecting the processing effect of gas welding or gas cutting. Summary of the Invention

[0004] The purpose of this application is to reduce the turbulence generated by the fluid in existing flow control valves, reduce the fluctuation of the flow velocity and flow direction of the fluid in the transmission pipeline, and improve the transmission stability of the transmission pipeline.

[0005] To achieve the above objectives, this application provides a flow regulation unit.

[0006] This application further provides a flow rate ratio adjustment device.

[0007] The flow regulating unit according to this application includes: a valve seat having an inlet and an outlet, a first chamber and a second chamber being disposed within the valve seat, wherein one of the first chamber and the second chamber is connected to the inlet and the other is connected to the outlet; a valve core being movably disposed within the first chamber, with one end of the valve core extending toward the second chamber; a flow restrictor being installed within the second chamber, the flow restrictor having a flow restrictor hole connecting the first chamber and the second chamber, the end of the valve core extending toward the second chamber being inserted into the flow restrictor hole; and a drive assembly being drively connected to the valve core, the drive assembly being used to drive the valve core toward and away from the flow restrictor, causing the valve core to stop and separate from the inner peripheral wall of the flow restrictor hole, thereby blocking and connecting the first chamber and the second chamber.

[0008] According to the flow regulating unit of this application, after the fluid flows into the flow regulating unit, it is first buffered in one of the chambers of the valve seat, and after the fluid flows through the valve core, it is buffered in another chamber before finally being discharged from the flow regulating unit. Compared with the prior art, the turbulence generated by the fluid in the flow regulating unit can be reduced, thereby reducing the fluctuation of the flow velocity and flow direction of the fluid in the transmission pipeline, and thus improving the transmission stability of the transmission pipeline.

[0009] In some examples of this application, the end of the valve core inserted into the flow-limiting hole is provided with a tapered portion, and the end of the flow-limiting hole near the first chamber is provided with a tapered surface. The tapered portion and the tapered surface are matched and adapted to mutually abut against each other.

[0010] In some examples of this application, the first chamber is connected to the outlet, the second chamber is connected to the inlet, and the second chamber is located below the first chamber along the height direction of the flow regulating unit.

[0011] In some examples of this application, the valve seat is provided with a communication port that connects the first chamber and the second chamber, so that the first chamber and the second chamber are interconnected. Furthermore, the flow limiting element is connected to the end of the communication port facing the second chamber, and in the axial direction of the flow limiting orifice, the projection of the communication port is located within the projection of the flow limiting element, and the projection of the flow limiting orifice is located within the projection of the communication port.

[0012] In some examples of this application, the driving assembly includes: a driving member, a transmission rod, a guide seat, and a guide slider. The driving member is drivenly connected to the transmission rod. The guide seat has a guide groove. The guide slider is installed in the guide groove to guide and cooperate with the guide seat. The guide slider is fixedly connected to the valve core and is drivenly connected to the transmission rod. The driving member is used to drive the transmission rod to move the guide slider along the guide groove, so that the guide slider drives the valve core to move closer to and away from the flow restrictor.

[0013] In some examples of this application, the transmission rod is constructed as a screw, which extends into the guide groove and passes through the guide slider. The screw is driven by the driving member and can cause the guide slider to move along the axial direction of the screw.

[0014] In some examples of this application, the valve seat is provided with a connecting flow channel, one end of which is connected to the first chamber, and the other end of which is connected to the inlet or outlet corresponding to the first chamber. The connecting flow channel forms a flow port on the inner wall of the first chamber. A sealing ring is provided around the outer peripheral wall of the valve core. The sealing ring abuts against the inner wall of the first chamber to seal the first chamber and the valve core. The sealing ring is located on the side of the flow port away from the flow limiting element.

[0015] In some examples of this application, the flow restrictor is provided with a first connection hole, and the inner wall of the second chamber near the first chamber is provided with a second connection portion. Fasteners pass through the first connection hole and the second connection portion to fix the flow restrictor to the valve seat.

[0016] In some examples of this application, the second chamber forms an installation port on the outer peripheral wall of the valve seat, the installation port being disposed opposite to the flow restrictor; a cover is sealed to the installation port, the cover being used to open or close the installation port.

[0017] The flow rate proportional adjustment device according to this application includes: a mounting base; a plurality of the above-described flow rate adjustment units, the flow rate adjustment units being mounted on the mounting base; a plurality of flow rate detection elements, each of the flow rate adjustment units corresponding to at least one of the flow rate detection elements, the flow rate detection elements being disposed at the outlet of the corresponding flow rate adjustment unit, the flow rate detection elements being used to detect the outflow flow rate of the corresponding flow rate adjustment unit; and a controller, wherein the drive component of each flow rate adjustment unit and each of the flow rate detection elements are communicatively connected to the controller.

[0018] According to the flow ratio regulating device of this application, the flow ratio regulating device has multiple flow regulating units. After the fluid flows into the corresponding flow regulating unit, it is first buffered in one of the chambers of the valve seat, and after the fluid flows through the valve core, it is buffered in another chamber, and finally discharged from the flow regulating unit. Compared with the prior art, the turbulence generated by the fluid in the corresponding flow regulating unit can be reduced, thereby reducing the fluctuation of the flow velocity and flow direction of the fluid in the transmission pipeline equipped with the flow ratio regulating device, and thus improving the transmission stability of the transmission pipeline. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the flow regulation unit according to an embodiment of this application;

[0020] Figure 2 This is a bottom view of the flow regulation unit according to an embodiment of this application;

[0021] Figure 3 yes Figure 2 Sectional view at point AA;

[0022] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0023] Figure 5 This is a schematic diagram of a valve seat according to an embodiment of this application;

[0024] Figure 6 This is a cross-sectional view of the valve seat according to an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the valve core according to an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of a current limiting component according to an embodiment of this application;

[0027] Figure 9 This is a cross-sectional view of the current limiting component according to an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of the flow rate ratio adjustment device according to an embodiment of this application;

[0029] Figure 11 This is a schematic diagram of the flow ratio adjustment device according to an embodiment of this application after removing the outer cover.

[0030] In the diagram, 100 represents the flow regulation unit;

[0031] 1. Valve seat; 11. Inlet; 12. Outlet; 13. First chamber; 14. Second chamber; 15. Connecting port; 16. Connecting flow channel; 161. Flow port; 17. Second connection part; 18. Mounting port;

[0032] 2. Valve core; 21. Conical section;

[0033] 3. Flow limiting component; 31. Flow limiting orifice; 32. Conical surface; 33. First connecting hole;

[0034] 4. Drive assembly; 41. Drive component; 42. Transmission rod; 43. Guide seat; 431. Guide groove; 44. Guide slider;

[0035] 5. Sealing ring; 6. Fasteners; 7. Cover;

[0036] 1000, Flow rate proportional adjustment device; 200, Mounting base; 300, Controller; 400, Outer casing. Detailed Implementation

[0037] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0038] This application discloses a flow regulating unit 100. The flow regulating unit 100 can be used independently as a flow regulating valve, or it can be incorporated into a proportional regulating device. The proportional regulating device is composed of multiple flow regulating units 100. The proportional regulating device 1000 adjusts the opening degree of each flow regulating unit 100 to regulate the corresponding fluid flow rate, thereby achieving the technical effect of adjusting the flow ratio between different fluids. The flow regulating unit 100 can be installed in a gas delivery system or in an infusion system. When the flow regulating unit 100 is installed in the gas delivery pipeline of a gas delivery system, the fluid whose flow rate is regulated by the flow regulating unit 100 can be gas. When the flow regulating unit 100 is installed in the infusion pipeline of an infusion system, the fluid whose flow rate is regulated by the flow regulating unit 100 can be liquid.

[0039] like Figures 1-9 As shown, the flow regulating unit 100 according to an embodiment of this application includes: a valve seat 1, a valve core 2, a flow limiting element 3, and a drive assembly 4. The outer peripheral wall of the valve seat 1 is provided with an inlet 11 and an outlet 12. Both the inlet 11 and the outlet 12 are adapted to be connected to a flow pipeline. The inlet 11 is adapted to allow fluid to flow into the valve seat 1, and the outlet 12 is adapted to allow fluid to flow out of the valve seat 1. The valve seat 1 is provided with a first chamber 13 and a second chamber 14. Both the first chamber 13 and the second chamber 14 are used to store fluid. One of the first chamber 13 and the second chamber 14 communicates with the inlet 11, and the other communicates with the outlet 12. That is, the first chamber 13 communicates with the inlet 11, and the second chamber 14 communicates with the outlet 12, or as... Figure 3As shown, the second chamber 14 is connected to the inlet 11, and the first chamber 13 is connected to the outlet 12. The valve core 2 is movably disposed within the first chamber 13, and one end of the valve core 2 extends toward the second chamber 14, as shown. Figure 1 , Figure 3 As shown, the first chamber 13 forms a clearance opening on the outer peripheral wall of the valve seat 1. The clearance opening is used to avoid the valve core 2. The valve core 2 can extend out of the valve seat 1 to be connected to the drive assembly 4 for transmission.

[0040] Furthermore, the flow restrictor 3 is installed in the second chamber 14. The flow restrictor 3 has a flow restrictor hole 31 connecting the first chamber 13 and the second chamber 14. Fluid can flow between the first chamber 13 and the second chamber 14 through the flow restrictor hole 31. One end of the valve core 2 extending towards the second chamber 14 is inserted into the flow restrictor hole 31. By driving the valve core 2 to move closer to or away from the flow restrictor 3, the valve core 2 is stopped or separated from the inner peripheral wall of the flow restrictor hole 31, thereby controlling the blocking or connection between the first chamber 13 and the second chamber 14. Specifically, when the valve core 2 stops with the inner peripheral wall of the flow restrictor hole 31, the gap between the valve core 2 and the flow restrictor hole 31 is closed, and the valve core 2 can prevent the fluid from flowing between the first chamber 13 and the second chamber 14. When the valve core 2 separates from the inner peripheral wall of the flow restrictor hole 31, the gap between the valve core 2 and the flow restrictor hole 31 increases, and fluid can flow between the first chamber 13 and the second chamber 14 through the gap between the valve core 2 and the flow restrictor hole 31.

[0041] Furthermore, by adjusting the gap between the valve core 2 and the inner peripheral wall of the flow limiting hole 31, the flow area between the valve core 2 and the flow limiting hole 31 can be increased or decreased, thereby increasing or decreasing the flow rate of the fluid flowing through the limiting hole.

[0042] Alternatively, it can be understood that the valve core 2 and the flow restrictor 3 cooperate to form the flow control structure of the flow regulating unit 100. The first chamber 13 is located on one side of the flow control structure, and the second chamber 14 is located on the other side. One of the first chamber 13 and the second chamber 14 can buffer the fluid flowing before passing through the flow control structure, and the other can buffer the fluid flowing after passing through the flow control structure. The drive assembly 4 is connected to the valve core 2 in a driving connection. The drive assembly 4 is used to drive the valve core 2 to move closer to or away from the flow restrictor 3 to adjust the gap between the valve core 2 and the inner peripheral wall of the flow restrictor 31.

[0043] Therefore, by allowing the fluid to first be buffered in one of the chambers of the valve seat 1 after flowing into the flow regulating unit 100, and then buffered in another chamber after flowing through the valve core 2, before finally being discharged from the flow regulating unit 100, the turbulence generated in the flow regulating unit 100 can be reduced compared with the prior art, thereby reducing the fluctuation of the flow velocity and flow direction of the fluid in the transmission pipeline, and thus improving the transmission stability of the transmission pipeline.

[0044] like Figure 4 , Figures 7-9 As shown, in some embodiments of this application, the end of the valve core 2 inserted into the flow-limiting hole 31 may be provided with a tapered portion 21, and the end of the flow-limiting hole 31 near the first chamber 13 is provided with a tapered surface 32. The tapered portion 21 and the tapered surface 32 are matched and adapted to mutually abut against each other. The tapered portion and the tapered surface 32 are located on the same side of the flow-limiting member 3. The tapered surface 32 allows for a larger opening in the axial end wall of the flow-limiting member 3 opposite to the tapered portion, making it easier for the valve core 2 to be inserted into the flow-limiting member 3 to cooperate with it. Furthermore, by matching the tapered portion 21 with the tapered surface 32, when the tapered portion 21 abuts against the tapered surface 32, the contact area between the tapered portion and the tapered surface 32 is larger, which can fully seal the gap between the tapered portion and the tapered surface 32, thereby preventing fluid leakage from the gap between the valve core 2 and the flow-limiting member 3 after the valve core 2 and the flow-limiting member 3 block the first chamber 13 and the second chamber 14.

[0045] like Figures 3-6 As shown, in some embodiments of this application, the first chamber 13 is connected to the outlet 12, and the second chamber 14 is connected to the inlet 11. That is, during the flow of fluid through the flow regulating unit 100, the fluid first flows from the inlet 11 into the second chamber 14, then flows from the second chamber 14 through the flow-limiting orifice 31 into the first chamber 13, and finally the fluid in the first chamber 13 is discharged from the outlet 12 out of the flow regulating unit 100. Furthermore, along the height direction of the flow regulating unit 100, the second chamber 14 is located below the first chamber 13. It should be noted that the height direction of the flow regulating unit 100 can refer to... Figure 1 In the vertical direction, by setting the second chamber 14 below the first chamber 13, the fluid can flow into the first chamber 13 in an upward overflow manner during the process of the fluid flowing from the second chamber 14 to the first chamber 13. This can make the fluid in the first chamber 13 more uniform and the fluid flow smoother, thereby further reducing the turbulence generated by the fluid in the valve seat 1.

[0046] like Figure 3 , Figure 4 , Figure 6 As shown, in some embodiments of this application, the valve seat 1 is provided with a communication port 15, which connects the first chamber 13 and the second chamber 14 so that the first chamber 13 and the second chamber 14 are interconnected. The flow limiting member 3 is connected to the end of the communication port 15 facing the second chamber 14. The communication port 15 and the flow limiting member 3 are arranged opposite to each other. The communication port 15 is used to avoid the valve core 2, so that the valve core 2 can pass through the flow port to extend from the first chamber 13 into the second chamber 14 and be inserted into the flow limiting hole 31 of the flow limiting member 3.

[0047] Along the axial direction of the flow restrictor 31 (i.e. Figure 1In the vertical direction, the projection of the connecting port 15 is located within the projection of the flow restrictor 3. When the flow restrictor 3 is installed in the second chamber 14, the flow restrictor 3 can completely block the connecting port 15, and the fluid cannot flow between the first chamber 13 and the second chamber 14 through the gap between the flow restrictor 3 and the inner wall of the second chamber 14. That is, the fluid can only flow between the first chamber 13 and the second chamber 14 through the flow restrictor 31. By cooperating with the valve core 2, the flow rate between the first chamber 13 and the second chamber 14 can be controlled.

[0048] Furthermore, the projection of the flow-limiting orifice 31 is located within the projection of the flow-limiting component 3. When the valve core 2 extends from the first chamber 13 into the second chamber 14, this arrangement ensures that the valve core 2 can abut against the inner peripheral wall of the flow-limiting orifice 31, thereby further achieving the technical effect of controlling the fluid flow rate between the first chamber 13 and the second chamber 14.

[0049] like Figure 1 , Figure 2 As shown, in some embodiments of this application, the drive assembly 4 may include: a drive member 41, a transmission rod 42, a guide seat 43, and a guide slider 44. The drive member 41 is drively connected to the transmission rod 42. The guide seat 43 may be provided with a guide groove 431. The guide slider 44 is installed in the guide groove 431 to guide and cooperate with the guide seat 43. The extending direction of the guide groove 431 may be consistent with the movement direction of the valve core 2. Figure 1 In the embodiment shown, the valve core 2 along Figure 1 When moving up and down in the middle, the guide groove 431 can move along... Figure 1 The vertical extension setting.

[0050] The guide slider 44 is fixedly connected to the valve core 2, and is also connected to the transmission rod 42. The driving component 41 drives the transmission rod 42 to move the guide slider 44 along the guide groove 431, so that the guide slider 44 moves the valve core 2 closer to or away from the flow restrictor 3. By using the guide groove 431 to guide the guide slider 44, the guide slider 44 can accurately push the valve core 2 closer to or away from the flow restrictor 3.

[0051] Furthermore, one of the guide slider 44 and the guide seat 43 is provided with an anti-rotation groove and the other is provided with an anti-rotation protrusion. The anti-rotation protrusion extends into the anti-rotation groove. The cooperation between the guide slider 44 and the guide seat 43 can also limit the rotation of the valve core 2 when the transmission component drives the valve core 2 to move through the guide slider 44, thereby reducing the offset of the valve core 2 during movement and thus improving the flow control accuracy of the flow regulating unit 100.

[0052] In addition, the drive element 41 can be configured as a drive motor, and the drive motor can be equipped with an encoder, which can further improve the flow control accuracy of the flow regulating unit 100. Of course, in some embodiments, when the flow regulating unit 100 is applied to an environment with low flow control accuracy, the drive element 41 can also be a cylinder or the like.

[0053] Furthermore, the transmission rod 42 can be constructed as a screw, which extends into the guide groove 431 and passes through the guide slider 44. When the screw is driven by the drive member 41, it rotates around the central axis of the screw, thereby driving the guide slider 44 to move along the axial direction of the screw. The outer peripheral wall of the screw has an external thread structure, and the inner peripheral wall of the guide slider 44 has an internal thread structure. The external and internal thread structures cooperate with each other, thus the transmission rod 42 and the guide slider 44 together form a screw-nut mechanism. This configuration allows the guide slider 44 to move more smoothly and precisely, reducing speed fluctuations when the valve core 2 moves, thereby further reducing turbulence generated in the valve seat 1 and further improving the flow stability of the pipeline. In addition, after the opening of the flow regulating unit 100 is adjusted, the transmission rod 42 and the guide slider 44 self-lock, making it difficult for the fluid in the valve seat 1 to drive the valve core 2, thus maintaining the opening of the flow regulating unit 100 and further reducing turbulence generated in the valve seat 1.

[0054] like Figure 3 , Figure 4 As shown, in some embodiments of this application, the valve seat 1 is provided with a communicating flow channel 16, one end of which is connected to the first chamber 13, and the other end of which is connected to the inlet 11 or outlet 12 corresponding to the first chamber 13, for example in... Figure 4 In the embodiment shown, when the first chamber 13 is connected to the outlet 12, the connecting channel 16 is connected between the outlet 12 and the first chamber 13. The connecting channel 16 forms a flow port 161 on the inner wall of the first chamber 13. The fluid in the first chamber 13 is suitable to flow into the connecting channel 16 from the flow port 161 and then flow to the outlet 12.

[0055] like Figure 4 As shown, a sealing ring 5 is provided around the outer peripheral wall of the valve core 2. The sealing ring 5 abuts against the inner wall of the first chamber 13. The sealing ring 5 is used to seal the gap between the inner wall of the first chamber 13 and the valve core 2. The sealing ring 5 is located on the side of the flow port 161 away from the flow restrictor 3. In this way, when the fluid flows between the flow restrictor 31 and the flow port 161, the sealing ring 5 can prevent the fluid from leaking from the clearance port of the valve seat 1 to the outside of the valve seat 1 through the gap between the inner wall of the first chamber 13 and the valve core 2, thereby improving the sealing effectiveness of the valve seat 1.

[0056] like Figure 4 , Figure 5, Figure 8 As shown, in some embodiments of this application, the flow restrictor 3 may be provided with a first connecting hole 33, and the inner wall of the second chamber 14 near the end of the first chamber 13 (i.e., Figure 3 The upper inner wall of the second chamber 14 can be provided with a second connecting part 17. The fastener 6 passes through the first connecting hole 33 and the second connecting part 17 to fix the flow restrictor 3 to the valve seat 1. Specifically, the first connecting hole 33 can be provided with a first connecting hole, and the second connecting part 17 can be provided with a second connecting hole. Both the first connecting hole and the second connecting hole are suitable for the fastener 6 to pass through. The fastener 6 can be constructed as a bolt. After the bolt passes through the first connecting hole and the second connecting hole in sequence, it fixes the flow restrictor 3 to the inner wall of the second chamber 14 near the first chamber 13, thereby achieving the technical effect of installing the flow restrictor 3 in the second chamber 14.

[0057] like Figures 2-4 As shown, in some embodiments of this application, the second chamber 14 has an installation port 18 formed on the outer peripheral wall of the valve seat 1. The installation port 18 is disposed opposite to the flow restrictor 3. A cover 7 is sealed and installed on the installation port 18, and the cover 7 is used to open or close the installation port 18. A sealing element is provided on the outer peripheral wall of the cover 7, surrounding the installation port 18, and is used to seal the gap between the cover 7 and the side wall of the installation port 18. The cover 7 is detachably connected to the side wall of the installation port 18. By removing the cover 7 from the installation port 18, the cover 7 can open the installation port 18, thereby opening the second chamber 14. An assembly worker can then insert the flow restrictor 3 into the second chamber 14 through the installation port 18, and can install or remove the flow restrictor 3 from the installation port 18.

[0058] After the flow restrictor 3 is installed in the second chamber 14, the assembler can connect the cover 7 to the side wall of the mounting port 18. In this way, the cover 7 can close the mounting port 18 to seal the second chamber 14. When the fluid flows through the second chamber 14, it cannot leak from the mounting port 18 to the outside of the valve seat 1, thereby ensuring that the valve seat 1 has good sealing performance.

[0059] Based on this, such as Figure 10 , Figure 11 As shown, this application further discloses a flow rate proportional adjustment device 1000. According to an embodiment of this application, the flow rate proportional adjustment device 1000 includes: a mounting base 200, a plurality of flow rate adjustment units 100, a plurality of flow rate detection elements (not shown in the figure), and a controller 300. The mounting base 200 can be used as a support frame for the flow rate proportional adjustment device 1000. The flow rate adjustment units 100 are mounted on the mounting base 200, and the flow rate adjustment units 100 are the flow rate adjustment units 100 described in the above embodiment.

[0060] Each flow regulation unit 100 corresponds to at least one flow detection element, which is disposed at the outlet 12 of the corresponding flow regulation unit 100. The flow detection element is used to detect the outflow flow of the corresponding flow regulation unit 100. In some specific embodiments, the flow detection element can be constructed as a flow sensor. The driving component 4 of each flow regulation unit 100 and each flow detection element are communicatively connected to the controller 300. The controller 300 is used to control the driving component 4 of the corresponding flow regulation unit 100 to operate according to the detection signal of the flow detection element, so as to adjust the outflow flow ratio among the multiple flow regulation units 100.

[0061] Therefore, according to the flow ratio regulating device 1000 of this application, the flow ratio regulating device 1000 has multiple flow regulating units 100. After the fluid flows into the corresponding flow regulating unit 100, it is first buffered in one of the chambers of the valve seat 1, and after the fluid flows through the valve core 2, it is buffered in another chamber, and finally discharged from the flow regulating unit 100. Compared with the prior art, the turbulence generated by the fluid in the corresponding flow regulating unit 100 can be reduced, thereby reducing the fluctuation of the flow velocity and flow direction of the fluid in the transmission pipeline equipped with the flow ratio regulating device 1000, and thus improving the transmission stability of the transmission pipeline.

[0062] Furthermore, the flow rate proportional regulation device 1000 can be configured as a gas flow rate proportional regulation valve. The gas flow rate proportional regulation valve has two flow rate regulation units 100. One flow rate regulation unit 100 is used to regulate the gas flow rate, and the other flow rate regulation unit 100 is used to regulate the flow rate of the combustion-supporting agent (e.g., oxygen). By using the flow rate regulation unit 100 of the above embodiment in the gas flow rate proportional regulation valve, the turbulence generated by the gas or combustion-supporting agent in the corresponding flow rate regulation unit 100 can be reduced. This reduces the fluctuations in the flow rate and flow direction of the gas and combustion-supporting agent in the transmission pipeline equipped with the gas flow rate proportional regulation valve. The flame temperature generated after igniting the mixture of gas and combustion-supporting agent is more uniform and stable, thereby improving the processing effect of gas welding or gas cutting processes.

[0063] like Figure 9As shown, in some embodiments of this application, the flow ratio regulating device 1000 may further include an outer cover 400, which covers the outside of each component of the flow ratio regulating device 1000 and protects the components. The outer cover 400 may be provided with a communication interface, which is communicatively connected to the controller 300. External devices can be connected to the communication interface to communicate with the controller 300. The external devices can adjust the preset value of the outflow flow ratio among the multiple flow regulating units 100 of the flow ratio regulating device 1000, thereby enabling the flow ratio regulating device 1000 to adapt to different types of fluid systems.

[0064] Furthermore, a fluid indicator light can also be provided on the outer casing 400. For example, when the flow rate proportional regulating device 1000 is a gas flow rate proportional regulating valve, a gas indicator light and a combustion-supporting material indicator light can be provided on the outer casing 400. The fluid indicator light is communicatively connected to the controller 300, and the controller 300 can control the corresponding fluid indicator light to emit a light signal according to the detection signal of the flow detection element.

[0065] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A flow regulating unit, characterized in that, The application relates to a flow regulating unit. The valve seat is provided with an inlet and an outlet, and a first chamber and a second chamber are arranged in the valve seat, one of the first chamber and the second chamber is communicated with the inlet, and the other is communicated with the outlet; The valve core is movably arranged in the first chamber, and one end of the valve core extends towards the second chamber; The flow limiting member is arranged in the second chamber, and the flow limiting member has a flow limiting hole for communicating the first chamber and the second chamber, and the end of the valve core extending towards the second chamber is inserted into the flow limiting hole; The driving assembly is in transmission connection with the valve core, and the driving assembly is used for driving the valve core to approach and move away from the flow limiting member, so that the valve core is in abutment with and separated from the inner peripheral wall of the flow limiting hole, and the first chamber and the second chamber are blocked and communicated.

2. The flow regulating unit of claim 1, wherein, The end of the valve core inserted into the flow limiting hole is provided with a tapered portion, the end of the flow limiting hole close to the first chamber is provided with a tapered surface, and the tapered portion is matched with the tapered surface and is adapted to be in abutment with each other.

3. The flow regulating unit according to claim 1 or 2, characterized in that The first chamber is communicated with the outlet, the second chamber is communicated with the inlet, and the second chamber is located below the first chamber in the height direction of the flow regulating unit.

4. The flow regulating unit of claim 3, wherein, The valve seat is provided with a communication port for communicating the first chamber and the second chamber, so that the first chamber and the second chamber are communicated with each other, and the end of the flow limiting member connected to the communication port towards the second chamber is located in the projection of the flow limiting member in the axial direction of the flow limiting hole, and the projection of the flow limiting hole is located in the projection of the communication port.

5. The flow regulating unit of claim 1, wherein, The driving assembly comprises a driving member, a transmission rod, a guide seat and a guide sliding block, the driving member is in transmission connection with the transmission rod, the guide seat is provided with a guide groove, the guide sliding block is arranged in the guide groove to be in guide connection with the guide seat, the guide sliding block is fixedly connected with the valve core, and the guide sliding block is in transmission connection with the transmission rod, and the driving member is used for driving the transmission rod to drive the guide sliding block to move along the guide groove, so that the guide sliding block drives the valve core to approach and move away from the flow limiting member.

6. The flow regulating unit of claim 5, wherein, The transmission rod is in the form of a screw rod, the screw rod extends into the guide groove and passes through the guide sliding block, the screw rod is driven by the driving member, and the guide sliding block can be driven to move along the axial direction of the screw rod.

7. The flow regulating unit of claim 1, wherein, The valve seat is provided with a communication flow channel, one end of the communication flow channel is communicated with the first chamber, the other end of the communication flow channel is communicated with the inlet or the outlet corresponding to the first chamber, and the communication flow channel forms a flow port on the inner wall of the first chamber; The outer peripheral wall of the valve core is annularly provided with a sealing ring, the sealing ring is in abutment with the inner wall of the first chamber to seal the first chamber and the valve core, and the sealing ring is located on the side of the flow port away from the flow limiting member.

8. The flow regulating unit of claim 1, wherein, The flow limiting member is provided with a first connecting hole, the second chamber is provided with a second connecting part near the inner wall of one end of the first chamber, and a fastener passes through the first connecting hole and the second connecting part to fix the flow limiting member to the valve seat.

9. The flow regulating unit of claim 1, wherein, The second chamber forms a mounting opening on the outer peripheral wall of the valve seat, and the mounting opening is arranged opposite to the flow limiting member. A cover is sealingly mounted on the mounting opening, and the cover is used to open or close the mounting opening.

10. A flow proportioning device, characterized by The installation seat comprises: a plurality of flow regulating units according to any one of claims 1-9, which are installed on the installation seat; a plurality of flow detecting members, each of which corresponds to at least one flow regulating unit, and each of which is arranged at the outflow opening of the corresponding flow regulating unit, and is used to detect the outflow of the corresponding flow regulating unit; a controller, and the drive assembly of each flow regulating unit and each flow detecting member are in communication connection with the controller. ​

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