Flow guiding device in batch machining for polishing fluid in inner flow channels of different specifications

Abstract

The utility model discloses a flow guiding device in batch machining for polishing fluid in inner flow channels of different specifications. The flow guiding device comprises a main flow channel, the input end of the flow dividing piece is connected with the output end of the main flow channel; n first flow channels with different inner diameters, wherein the input ends of the N first flow channels are jointly connected to the N output ends of the shunting piece; the input end of the nth throttling element is connected with the output end of the nth first flow channel; and the input end of the nth second flow channel is connected with the output end of the nth throttling element. The flow guiding device for batch machining has the technical advantages of being high in structural applicability, efficient in machining, free of damage to matrix structures, free of heat affected zones, high in polished surface quality and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of precision machining of parts, in particular to a diversion device in batch machining of fluid polishing of internal flow channels with different specifications. Background Art

[0002] Machining burrs, sintered particles adhered to the internal flow channels during femtosecond laser machining, bonded powders on the surface of additive manufacturing internal flow channels, etc. will all affect the service performance and safety of parts: when the fluid flowing through the internal flow channels rubs against the surface layer at high speed to cause burrs, adhered residue particles or bonded powders to fall off, they will become redundant substances and diffuse everywhere with the fluid, or block the oil circuit or cause mechanical wear failures, thus causing major safety accidents; the rough inner surface is likely to become a fatigue crack source during long-term use, and in the case of a high-temperature oil circuit system, carbon deposition is also likely to occur; the tool marks, inflection point sharp corners or tool joint steps on the surface of the machined flow channels, and the "step" phenomenon on the surface of the internal flow channels machined by femtosecond laser and additive manufacturing will all cause turbulence, eddy currents and a sharp increase in the fluid frictional resistance during the fluid movement process, and even cause the fluid to get out of control, generate vibrations and reduce the service life of the parts. The rough surface will also cause a large number of cavitation bubbles in the fluid, affecting combustion and hydraulic power, and even causing cavitation corrosion; in summary, when machining the surface of bifurcated and intersecting internal flow channels by technologies such as precision machining, femtosecond / water jet / long pulse laser machining, electric discharge machining, additive manufacturing (3D printing), etc., there will be adverse problems such as burrs, bonded powders, sintered particles and other residues, rough surfaces and remelting layers, and certain surface finishing technologies need to be adopted to eliminate these adverse effects before the performance requirements of the product can be met. By consulting domestic and foreign existing patents and technologies, when the inner diameter of the part's internal flow channel is relatively large (>3 mm) and the length-diameter ratio is relatively small (<100:1), the abrasive flow technology can be used for polishing. When the inner diameter of the part's internal flow channel is relatively small (<3 mm) and the length-diameter ratio is relatively large (>100:1), the water-based two-phase flow technology can be used for polishing. Structures between the two, such as a relatively large inner diameter (>3 mm) and a relatively large length-diameter ratio (>100:1) or a relatively small inner diameter (<3 mm) and a relatively small length-diameter ratio (<100:1), can use a composite process of water-based two-phase flow and abrasive flow for polishing.

[0003] Both water-based two-phase flow and abrasive flow are fluid polishing methods. The main difference is that the polishing medium of water-based two-phase flow consists of freely flowing water-based and abrasive particles. The polishing medium has a low viscosity and is easy to pass through micro-fine and large aspect ratio internal channels. The polishing medium of abrasive flow is composed of abrasive particles wrapped in a viscous colloid, and the polishing medium is easy to extrude and grind the shorter and thicker channels. Currently, the existing technologies and patents for fluid polishing mainly focus on polishing single internal channel components independently, and unidirectional or bidirectional polishing methods can be adopted. That is, the polishing medium enters from one port of a single-pass internal channel to achieve polishing in one direction of a single pass, or the polishing medium enters alternately from two ports of a single-pass internal channel to achieve reciprocating polishing in two directions. However, there are difficulties in batch processing of fluid polishing for internal channel components of different specifications or in one-time unified processing of all channels of components integrating different specifications of internal channels. The reason is that after the fluid is split by a flow divider valve, since the fluid always spontaneously prefers to pass through the path with the lowest flow resistance, and the caliber, aspect ratio or local variable characteristics of each internal channel are different, the flow rate, flow rate and pressure of the fluid polishing medium distributed in each internal channel are uneven, resulting in good polishing effects in some channels, over-polishing in some channels, and weak or even unpolished effects in some channels. Separately polishing each internal channel one by one often has a serious adverse impact on the processing efficiency.

[0004] So far, after reviewing existing patents and technologies at home and abroad, there is no effective method for batch processing of fluid polishing for internal channel components of different specifications or for one-time unified processing of all channels of components integrating different specifications of internal channels. With the extensive application of advanced manufacturing processes such as precision machining, femtosecond / water jet / long pulse laser machining, electrical discharge machining and additive manufacturing (3D printing) in the field of complex internal channel processing, and the requirements of high-end equipment for the performance and safety of such components, there is an urgent need to develop new technical means to solve the problems of batch processing of fluid polishing for internal channel components of different specifications or for one-time unified processing of all channels of components integrating different specifications of internal channels. However, there are difficulties in the existing known fluid polishing technologies for batch polishing methods of internal channels of different specifications, thus greatly restricting the efficiency and industrial wide application of fluid polishing technologies. Summary of the Utility Model

[0005] In order to solve the above problems existing in the prior art, the present utility model provides a flow guiding device in the batch processing of fluid polishing for internal channels of different specifications. The technical problems to be solved by the present utility model are realized through the following technical solutions:

[0006] The present utility model provides a flow guiding device in the batch processing of fluid polishing for internal channels of different specifications. The flow guiding device in the batch processing includes:

[0007] Main flow channel;

[0008] A flow splitter, the input end of the flow splitter is connected to the output end of the main flow channel;

[0009] N first flow channels with different inner diameters, the input ends of the N first flow channels are commonly connected to the N output ends of the flow splitter, and N is an integer greater than or equal to 2;

[0010] N throttling components, the input end of the nth throttling component is connected to the output end of the nth first flow channel, where 1 ≤ n ≤ N;

[0011] N second flow channels with different inner diameters, the input end of the nth second flow channel is connected to the output end of the nth throttling component.

[0012] In a possible implementation manner of the present utility model, the inner diameter of the nth first flow channel is equal to the outer diameter of the nth second flow channel, and the inner diameter of the nth second flow channel and the inner diameter of the inner flow channel of the part satisfy d is the inner diameter of the nth second flow channel, is the inner diameter of the nth inner flow channel of the part.

[0013] In a possible implementation manner of the present utility model, the throttling component includes a proportional valve.

[0014] In a possible implementation manner of the present utility model, the maximum flow channel inner diameter of the nth proportional valve is greater than the inner diameter of the nth second flow channel, and satisfies D = (1.11 - 1.25)d, where D is the maximum flow channel inner diameter of the nth proportional valve, and d is the inner diameter of the nth second flow channel.

[0015] In a possible implementation manner of the present utility model, the ratio of the maximum flow channel inner diameter of the nth proportional valve to the aspect ratio of the nth second flow channel satisfies D = b·m, where D is the maximum flow channel inner diameter of the nth proportional valve, m is the aspect ratio of the nth second flow channel, and b is the first proportional coefficient after eliminating the unit, and the value range of b is 0.03 - 0.16.

[0016] In a possible implementation manner of the present utility model, the maximum flow channel inner diameter of the nth proportional valve and the roughness of the nth second flow channel satisfy D is the maximum flow channel inner diameter of the nth proportional valve, is the roughness of the nth second flow channel, and c is the second proportional coefficient after eliminating the unit, and the value range of c is 0.2 - 0.8.

[0017] In a possible implementation manner of the present utility model, the feed flow rate of the main flow channel and the maximum throttling flow rates of the N proportional valves satisfy Q 总 > Q1 + Q2 +...... + Q n ...... + QN , where Q 总 is the feed flow rate of the total flow channel, and Q n is the maximum throttling flow rate of the nth proportional valve. In a possible implementation manner of the present utility model, Q 总 = k(Q1 + Q2 +......+ Q n ......+ Q N ), where k = 1.15 - 1.28.

[0018] In a possible implementation manner of the present utility model, the feed pressure of the total flow channel and the throttling flow rates of the N proportional valves satisfy is the throttling flow rate of the nth proportional valve, a is the third proportionality coefficient after eliminating the unit, and the value range of a is 0.05 - 0.2.

[0019] In a possible implementation manner of the present utility model, the set throttling flow rate of the nth proportional valve satisfies where is the inner diameter of the inner flow channel of components of different specifications, e is the proportionality coefficient after eliminating the unit, and the value of e is 1.05 - 1.1.

[0020] In a possible implementation manner of the present utility model, the throttling flow rate of the nth proportional valve satisfies where is the inner diameter of the inner flow channel of the nth part, e is the fourth proportionality coefficient after eliminating the unit, and the value of e is 1.05 - 1.1.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] In the mass production processing guiding device provided by the present utility model, polishing medium is input through the total flow channel, and then the polishing medium is shunted by the shunt member. After shunting, the polishing medium enters N first flow channels with different inner diameters respectively. Each first flow channel is connected to a throttling member, and each throttling member is connected to a second flow channel. Thus, the size of the flow channel can be controlled by the throttling member, so that the polishing medium flows into the inner flow channel of the part according to the set ratio to polish the inner flow channel of the part. The mass production processing guiding device provided by the present utility model has many technical advantages such as high structural applicability, high processing efficiency, no damage to the matrix tissue, no heat affected zone, and high polishing surface quality. It is a green and low-carbon environmental protection device without dust, low noise, and no chemical pollution.

[0023] The utility model realizes that after the polishing medium is pushed out of the material cylinder, a device design of adding a flow dividing valve and a proportional valve first is adopted to give priority to dividing the polishing medium into multiple fluid streams before entering the ports of internal flow channel parts of different specifications and connecting with each port of the internal flow channel, innovating the flow dividing law in fluid polishing. The total pressure is calculated by combining the calibers of internal flow channels of different specifications, and the proportional valve is used to keep the flow rate of the polishing medium at each port of the internal flow channel locked, so as to finally realize the synchronous polishing of internal flow channels of different specifications at one time and the same polishing effect. It solves the problems of batch processing of fluid polishing of internal flow channel parts of different specifications or unified processing of all flow channels of parts integrating internal flow channels of different specifications at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] The drawings here are incorporated into the specification and form a part of this specification. These drawings show the embodiments conforming to the present utility model and are used together with the specification to illustrate the technical solutions of the present utility model.

[0026] Figure 1 FIG. 1 is a schematic structural diagram of a diversion device in the batch processing of fluid polishing of internal flow channels of different specifications provided by an embodiment of the present utility model;

[0027] Figure 2 FIG. 2 is a schematic structural diagram of another diversion device in the batch processing of fluid polishing of internal flow channels of different specifications provided by an embodiment of the present utility model.

[0028] Reference numerals in the drawings:

[0029] Total flow channel - 1; Flow dividing part - 2; First flow channel - 3; Throttling part - 4; Second flow channel - 5. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Based on this, please refer to Figure 1 , Figure 1The structural schematic diagram of a diversion device in the batch processing of fluid polishing for internal channels with different specifications provided by an embodiment of the present utility model. An embodiment of the present utility model provides a diversion device in the batch processing of fluid polishing for internal channels with different specifications. The diversion device in the batch processing includes:

[0031] The main flow channel 1;

[0032] A flow splitting member 2, the input end of the flow splitting member 2 is connected to the output end of the main flow channel 1;

[0033] N first flow channels 3 with different inner diameters, the input ends of the N first flow channels 3 are commonly connected to the N output ends of the flow splitting member 2, and N is an integer greater than or equal to 2;

[0034] N throttling members 4, the input end of the nth throttling member 4 is connected to the output end of the nth first flow channel 3, where 1 ≤ n ≤ N;

[0035] N second flow channels 5 with different inner diameters, the input end of the nth second flow channel 5 is connected to the output end of the nth throttling member 4.

[0036] In this embodiment, the diversion device in the batch processing inputs the polishing medium through the main flow channel 1, and then the polishing medium is split by the flow splitting member 2. After splitting, the polishing medium enters the N first flow channels 3 with different diameters respectively. Each first flow channel 3 is connected to a throttling member 4, each throttling member 4 is connected to a second flow channel 5, and each second flow channel 5 is connected to the internal flow channels of parts with different specifications. The internal flow channels of parts are the internal flow channels that need to be polished by the polishing medium. Thus, the flow rate of the flow channel can be controlled by the throttling member 4, so that the polishing medium flows out through the second flow channel 5 according to the set ratio. This embodiment aims at flow channels with different specifications, different diameters, different structures, and different flow resistances. By adding throttling members in front of each flow channel to control the upper limit of the flow rate of the polishing medium entering each flow channel, combined with the flow rate locking function of the proportional valve after processing for a period of time, the problem that the internal flow channels of parts with a large initial diameter and low flow resistance become better and better with polishing, while the internal flow channels of parts with a small diameter and large flow resistance become worse and worse with polishing is solved, so that each flow channel has the same and excellent surface roughness after being polished.

[0037] Optionally, the inner diameter of the nth first flow channel 3 is equal to the outer diameter of the nth second flow channel 5, and the inner diameter of the nth second flow channel 5 and the inner diameter of the internal flow channel of the part satisfy d is the inner diameter of the nth second flow channel 5, is the inner diameter of the nth internal flow channel of the part. The reason for such a setting is that if the inner diameter d of the second flow channel 5 is equal to or less than the inner diameter of the internal flow channel of the part Then, due to the constraint of the smaller diameter of the second flow channel 5, the polishing medium preferentially polishes and wears the second flow channel 5, while the polishing efficiency of the inner flow channel of the part is relatively low or even unable to polish. Through engineering tests, it is known that when this occurs, it can enable the polishing medium to effectively polish the inner flow channel of the part. If d is too large, the pressure on the port of the inner flow channel of the part is too high, which will cause over-polishing and flaring deformation at the port of the inner flow channel of the part.

[0038] Preferably, the difference between the inner diameter of the first flow channel 3 and the inner diameter of the second flow channel 5 is equal to twice the wall thickness of the second flow channel 5.

[0039] Preferably, the material of the first flow channel 3 includes stainless steel.

[0040] Preferably, the material of the second flow channel 5 includes stainless steel or a hose. Stainless steel is applicable to the batch processing of fluid polishing of inner flow channel parts of different specifications. When the second flow channel 5 is replaced with a hose, it is also applicable to the one-time all-processing of all flow channels of parts integrating different specifications of inner flow channels.

[0041] Optionally, the throttling member 4 includes a proportional valve, which is composed of a proportional solenoid valve and a flow valve. It uses a proportional solenoid valve to replace the manual adjustment device of the throttle valve or speed control valve, and adjusts the opening of the throttle valve by inputting an electric signal to regulate the flow rate of the system. When an electric signal is input, the throttle valve is balanced by the interaction of the push rod and the spring at the left end of the valve core under the electromagnetic force of the proportional solenoid valve. At this time, the corresponding throttle opening is a certain value. When different signal currents are input, there are different throttle openings.

[0042] Optionally, the maximum flow channel inner diameter of the nth proportional valve (i.e., the flow channel inner diameter of the proportional valve when the flow rate is the largest) is greater than the diameter of the nth second flow channel 5, and satisfies D = (1.11 - 1.25)d, where D is the maximum flow channel inner diameter of the nth proportional valve and d is the inner diameter of the nth second flow channel. The reason for this setting is that if the maximum flow channel inner diameter D controlled by the proportional valve is equal to or less than d, the polishing medium will preferentially polish and wear the proportional valve due to the constraint of the smaller diameter of the proportional valve, and the polishing efficiency of the inner flow channel of the part is relatively low or even unable to polish. Through engineering tests, it is known that when D = (1.11 - 1.25)d, it can enable the polishing medium to effectively polish the inner flow channel of the part. If D is too large, the second flow channel 5 will cause too much pressure on the port of the inner flow channel of the part, and the second flow channel 5 will cause over-polishing and flaring deformation at the port of the inner flow channel of the part.

[0043] Optionally, the ratio of the maximum flow channel inner diameter of the nth proportional valve to the aspect ratio of the nth second flow channel 5 satisfies D = b·m, where D is the maximum flow channel inner diameter of the nth proportional valve, m is the aspect ratio of the nth second flow channel, and b is the first proportionality coefficient after removing the unit. The value range of b is 0.03 to 0.16. The reason for this setting is that the larger the aspect ratio of the second flow channel 5, the longer the flow channel, and the worse the flow resistance and passability of the polishing medium. Therefore, when the aspect ratio is larger, the inner diameter of the flow channel controlled by the proportional valve should be correspondingly reduced to enhance the variable cross-section pressure increase degree of the polishing medium flowing from the first flow channel 3 into the proportional valve, but still be larger than the inner diameter d of the second flow channel 5. Through engineering tests, it is known that when D = b·m and the value range of b is 0.03 to 0.16, it is possible to avoid the situation where the larger the aspect ratio of the second flow channel 5 and the longer the flow channel, the worse the flow resistance and passability of the polishing medium, resulting in a reduction in polishing efficiency.

[0044] Optionally, the maximum flow channel inner diameter of the nth proportional valve and the roughness of the nth second flow channel 5 satisfy is the roughness of the nth second flow channel 5, and c is the second proportionality coefficient after removing the unit. The value range of c is 0.2 to 0.8. The reason for this setting is that as the roughness of the second flow channel 5 increases, it is necessary to increase the maximum flow channel inner diameter of the proportional valve and the upper limit of the controlled flow rate in order to enable the polishing medium entering the inner flow channel of the part to generate sufficient pressure on the wall surface for efficient polishing. Through engineering tests, it is known that when the value range of c is 0.2 to 0.8, it can not only meet the efficient polishing of the inner flow channel of the part, but also avoid the over-polishing phenomenon at the flow port.

[0045] Optionally, the feed flow rate of the total flow channel 1 and the maximum throttling flow rates of the N proportional valves satisfy:

[0046] Q 总 >Q1+Q2+......+Q n ......+Q N where Q 总 is the feed flow rate of the total flow channel, and Q n is the maximum throttling flow rate of the nth proportional valve.

[0047] Furthermore, Q 总 =k(Q1+Q2+......+Q n ......+Q N ), where k = 1.15 to 1.28. The reason for this setting is that there will be pressure loss when the polishing medium flows through the proportional valve. Therefore, it is necessary to reduce the total flow rate (total inner diameter) of all proportional valves to compensate for the pressure loss of the polishing medium flowing from the first flow channel 3 into the proportional valve, so as to achieve effective polishing of the inner flow channel of the part.

[0048] Optionally, the feed pressure of the total flow channel 1 and the set throttling flow rates of the N proportional valves satisfy where Q n * is the throttling flow rate of the nth proportional valve, a is the third proportionality coefficient after eliminating the unit, and the value range of a is 0.05 to 0.2. The reason for this setting is that the internal flow channels of parts with a large initial diameter and low flow resistance get better with polishing, so the throttling flow rate of the proportional valve needs to be set lower to reduce the polishing effect, while the internal flow channels of parts with a small initial diameter and high flow resistance get worse with polishing, so the throttling flow rate of the proportional valve needs to be set higher to enhance the polishing effect. Finally, under the given total feed pressure, the polishing medium can achieve a consistent surface roughness polishing effect on the internal flow channels of different parts.

[0049] Furthermore, the set throttling flow rate of the nth proportional valve satisfies where is the inner diameter of the internal flow channel of the nth component, e is the fourth proportionality coefficient after eliminating the unit, and the value range of e is 1.05 to 1.1. The reason for this setting is that the internal flow channels of parts with a large initial diameter and low flow resistance get better with polishing, so the throttling flow rate of the proportional valve needs to be set lower to reduce the polishing effect, while the internal flow channels of parts with a small initial diameter and high flow resistance get worse with polishing, so the throttling flow rate of the proportional valve needs to be set higher to enhance the polishing effect. Finally, under the given total feed pressure, the polishing medium can achieve a consistent surface roughness polishing effect on the internal flow channels of different parts. Therefore, the set throttling flow rate of the proportional valve is inversely proportional to the inner diameter of the internal flow channels of parts with different specifications.

[0050] Optionally, the flow splitter 2 includes a flow splitting valve. A flow splitting valve is a mechanical device used to divide a fluid or gas from one inlet into two or more outlets. The working principle of the flow splitting valve is based on the pressure difference of the fluid or gas. When the fluid enters the flow splitting valve through the inlet, it encounters a movable valve, which can be adjusted manually or automatically. The movement of the valve changes the connection mode between the inlet and the outlets, resulting in the splitting of the fluid or gas to different outlets.

[0051] Optionally, the value range of N is 3 - 20. For example, see Figure 2 , where the value of N is 3.

[0052] In view of the deficiencies of the prior art, the present utility model proposes the internal flow path shunt law under fluid polishing based on the design and engineering tests of the laws of fluid motion distribution and diversion. The total pressure and branch flow rate required for the polishing medium at each port are obtained. Through the device design of adding a shunt valve and a proportional valve after the polishing medium is pushed out of the material cylinder, the polishing medium is preferentially shunted into multiple streams of fluid before entering the ports of internal flow path components of different specifications and connected to each port of the internal flow path. Based on the shunt law, combined with the inner diameters of internal flow paths of different specifications, the total polishing medium pressure and the throttling flow rate required to be set for each proportional valve are calculated. Through the throttling effect of the proportional valve, batch processing of fluid polishing of internal flow path components of different specifications at one time is finally realized, as well as one-time all-round processing of all flow paths of components integrating internal flow paths of different specifications. The problem of batch processing of fluid polishing of internal flow path components of different specifications is solved.

[0053] In the batch processing of the present utility model, the diversion device overcomes the drawbacks of various existing internal flow path surface finishing technologies, fills the gap in the effective polishing method for internal flow path components of different specifications or components integrating internal flow paths of different specifications, and solves the key post-processing problem restricting the engineering application of advanced processes such as additive manufacturing in the high-end equipment field. This technology belongs to the physical polishing technology and has many technical advantages such as high structural applicability, high processing efficiency, no damage to the matrix tissue, no heat affected zone, and high polishing surface quality. It is a green, low-carbon and environmentally friendly device without dust, low noise and no chemical pollution.

[0054] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present utility model. Therefore, the "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present utility model, the magnitude of the serial numbers of the above steps / processes does not mean the sequence of execution, and the execution sequence of each step / process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present utility model. The serial numbers of the embodiments of the present utility model above are only for description and do not represent the advantages or disadvantages of the embodiments.

[0055] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including such element.

[0056] As described above, the above is only the implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should be covered within the protection scope of the present utility model.

Claims

1. A flow guide device for batch processing of fluid polishing of internal flow channels of different specifications, characterized in that: The flow guiding device in the batch processing comprises: Total flow channel; A flow divider, the input end of which is connected to the output end of the main flow channel; N first flow channels with different inner diameters, the input ends of the N first flow channels being commonly connected to the N output ends of the flow divider, where N is an integer greater than or equal to 2; N throttling elements, an input end of the nth throttling element is connected to an output end of the nth first flow channel, 1≤n≤N; N second flow channels with different inner diameters, the input end of the nth second flow channel being connected to the output end of the nth throttling element; Wherein, the throttling element comprises a proportional valve; The maximum flow channel inner diameter of the nth proportional valve is larger than the inner diameter of the nth second flow channel, and satisfies D=(1.11~1.25)d, where D is the maximum flow channel inner diameter of the nth proportional valve, and d is the inner diameter of the nth second flow channel.

2. The flow guiding device in batch processing according to claim 1, characterized in that: The inner diameter of the nth first flow channel is equal to the outer diameter of the nth second flow channel, and the inner diameter of the nth second flow channel satisfies the inner diameter of the flow channel in the part. d is the inner diameter of the nth second flow channel, is the inner diameter of the flow channel in the nth part.

3. The flow guiding device in batch processing according to claim 2, characterized in that: The ratio of the maximum inner diameter of the flow channel of the nth proportional valve and the length-to-diameter ratio of the nth second flow channel satisfies D=b·m, where D is the maximum inner diameter of the flow channel of the nth proportional valve, m is the length-to-diameter ratio of the nth second flow channel, and b is the first proportional coefficient after eliminating the unit, and the numerical range of b is 0.03 to 0.

16.

4. The flow guiding device in batch processing according to claim 2, characterized in that: The maximum flow channel inner diameter of the nth proportional valve and the roughness of the nth second flow channel satisfy D is the maximum flow channel inner diameter of the nth proportional valve, is the roughness of the nth second flow channel, c is the second proportional coefficient after eliminating the unit, and the value range of c is 0.2 to 0.

8.

5. The flow guiding device in batch processing according to claim 2, characterized in that: The feed flow rate of the total flow channel and the maximum throttling flow rate of the N proportional valves meet Q 总 >Q1+Q2+......+Q n ......+Q N , where Q 总 is the feed flow rate of the total flow channel, Q n is the maximum throttling flow of the nth proportional valve.

6. The flow guiding device for batch processing according to claim 5, characterized in that: Q 总 =k(Q1+Q2+......+Q n ......+Q N ),k=1.15~1.28。 7. The flow guiding device in batch processing according to claim 2, characterized in that: The feed pressure of the total flow channel and the throttling flow of the N proportional valves meet is the throttling flow of the nth proportional valve, a is the third proportional coefficient after eliminating the unit, and the value range of a is 0.05 to 0.

2.

8. The flow guiding device for batch processing according to claim 7, characterized in that: The throttling flow of the nth proportional valve satisfy in, is the inner diameter of the flow channel in the nth part, e is the fourth proportional coefficient after eliminating the unit, and the value of e is 1.05~1.1.

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