Device for polishing inner flow channel structures in batches through fluid

Abstract

The utility model relates to a device for polishing internal flow channel structures in batches by adopting fluid, which comprises a main input pipeline, a plurality of branch output pipelines connected with the main input pipeline through a flow divider valve, and internal flow channel structures connected with the output ends of the branch output pipelines. The inner sectional area of the branch output pipelines is the same, and the inner sectional area of the main input pipeline is larger than or equal to the sum of the inner sectional areas of the branch output pipelines. A throttle valve is arranged on each branch output pipeline; a flow limiting runner is arranged in the throttling valve, and the inner sectional area of the flow limiting runner is larger than or equal to the inner sectional area of the inner runner structure. According to the inner runner structure, the flow divider valve and the throttling valve are arranged, so that the pressure or flow of the polishing medium entering each inner runner structure is stable, constant and consistent, and the consistent polishing effect is achieved on inner runner structure parts of the same specification.

Description

Technical Field

[0001] The utility model belongs to the technical field of parts precision machining, and in particular relates to a device for batch polishing an inner flow channel structure using fluid. Background Art

[0002] Parts with internal flow channel structures are widely used in aerospace, shipbuilding, nuclear, automotive, mold and other industrial fields. In particular, parts related to fluid power systems often have complex internal flow channel structures with bifurcations and intersections. The internal flow channel structure plays a role in transporting, exchanging or applying hydraulic pressure to gas and liquid fluids.

[0003] The process technologies for processing the inner flow channel include precision machining, femtosecond / water-conducting / long-pulse laser processing, electrospark machining and additive manufacturing (3D printing). Except for additive manufacturing technology, other single processes require combined processing, and all have processing defects that affect the surface roughness of the inner flow channel to varying degrees. Therefore, it is necessary to polish the fine-machined surface of the inner flow channel. However, the inner flow channel structural parts usually also have batch characteristics. The inner flow channel structural parts of the same specifications have consistency requirements for materials, calibers, aspect ratios and local deformation characteristics. When the fluid polishing technology is used to batch polish the inner flow channel structural parts of the same specifications, different polishing effects will be formed in different inner flow channels. At present, there is no effective solution to solve the difference in polishing consistency in fluid batch polishing. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a device for batch polishing the inner flow channel structure using fluid. The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] The utility model provides a device for batch polishing an inner flow channel structure using fluid, comprising: a total input pipeline, the total input pipeline is connected to a plurality of branch output pipelines through a diverter valve, the output ends of the plurality of branch output pipelines are all connected to the inner flow channel structure; the inner cross-sectional areas of the plurality of branch output pipelines are the same, the inner cross-sectional area of ​​the total input pipeline is ≥ the sum of the inner cross-sectional areas of the plurality of branch output pipelines; a throttle valve is arranged on each branch output pipeline; a limited flow channel is arranged in the throttle valve, and the inner cross-sectional area of ​​the limited flow channel is ≥ the inner cross-sectional area of ​​the inner flow channel structure.

[0006] In one embodiment of the present invention, the inner cross-sectional areas of the inner flow channel structures correspondingly connected to the plurality of branch output pipelines are all the same.

[0007] In one embodiment of the utility model, the diverter valve includes a main pipe port and a plurality of branch pipe ports, the main pipe port is connected to a main input pipeline, and each branch pipe port is respectively connected to a branch output pipeline; the inner cross-sectional area of ​​the main pipe port of the diverter valve is ≥ the sum of the inner cross-sectional areas of the plurality of branch pipe ports of the diverter valve.

[0008] In one embodiment of the utility model, the internal cross-sectional area of ​​the total pipe opening of the diverter valve is ≥ k1 times the sum of the internal cross-sectional areas of several branch pipe openings of the diverter valve; wherein k1 is the first coefficient, and the value range of the first coefficient k1 is 1.2-1.5.

[0009] In one embodiment of the present utility model, the inner cross-sectional area of ​​the branch pipe opening of the diverter valve is the same as the inner cross-sectional area of ​​the connected branch output pipeline.

[0010] In one embodiment of the present invention, the inner cross-sectional area of ​​the branch output pipeline is greater than or equal to the inner cross-sectional area of ​​the inner flow channel structure.

[0011] In one embodiment of the present invention, the inner cross-sectional area of ​​the branch output pipeline is k2 times the inner cross-sectional area of ​​the inner flow channel structure; wherein k2 is the second coefficient; and the value range of the second coefficient k2 is 1.08 to 1.25.

[0012] In one embodiment of the present invention, the inner cross-sectional area of ​​the flow limiting channel is k3 times the inner cross-sectional area of ​​the inner channel structure; wherein k3 is the third coefficient; and the value range of the third coefficient k3 is 1.05 to 1.18.

[0013] In one embodiment of the present invention, the feed pressure of the total input pipeline is k4 times the sum of the inner cross-sectional areas of a plurality of inner flow channel structures; wherein k4 is the fourth coefficient; and the fourth coefficient k4 is 0.065.

[0014] In one embodiment of the present utility model, when the outlet flow rate of the inner flow channel structure increases by 5%, the feed pressure of the total input pipeline increases by 10%.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model adopts a device for batch polishing of inner flow channel structures using fluids, and a total input pipeline is connected to a plurality of branch output pipelines via a diverter valve, and a throttle valve is provided on each branch output pipeline, so that the pressure or flow of the polishing medium entering each inner flow channel structure is stable, constant and consistent, thereby achieving a consistent polishing effect for inner flow channel structure components of the same specification.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a device for batch polishing an inner flow channel structure using fluid provided in an embodiment of the utility model.

[0019] Icon: 10-Main input pipeline; 20-Diverter valve; 30-Branch output pipeline; 40-Throttle valve; DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, a device for batch polishing an inner flow channel structure using fluid according to the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] The above and other technical contents, features and effects of the utility model are clearly presented in the following detailed description of the specific implementation mode in conjunction with the accompanying drawings. Through the description of the specific implementation mode, the technical means and effects adopted by the utility model to achieve the predetermined purpose can be more deeply and specifically understood. However, the attached drawings are only for reference and explanation, and are not used to limit the technical solution of the utility model.

[0022] The process technologies for processing the inner flow channel include precision machining, femtosecond / water-guided / long-pulse laser machining, electrospark machining and additive manufacturing, among which, the inner flow channel processed by precision machining will produce burrs, sharp corners of inflection points or tool steps; the inner flow channel surface processed by femtosecond laser will produce adhered residue particles and surface "step" effect; the inner flow channel surface processed by femtosecond / water-guided / long-pulse laser and electrospark will produce remelting layers to varying degrees; additive manufacturing technology has process characteristics such as temperature gradient and layer-by-layer forming in the process of forming parts, resulting in semi-sintered or bonded powder particles and surface "step" effect on the surface of the inner flow channel. The above processing defects will affect the performance and safety of the inner flow channel structural parts, and surface finishing technology needs to be used to process the inner flow channel.

[0023] Fluid polishing technology is one of the better surface finishing technologies available. It has a good effect when polishing the inner flow channel structure parts individually, but it will bring serious adverse effects on processing costs, equipment quantity, processing efficiency, power consumption and economy. If fluid polishing technology is used for batch processing of inner flow channel parts of the same specifications, there are also limitations, which are mainly reflected in the poor consistency of polishing quality and the difference in polishing quality, that is, there are always some inner flow channels with good polishing effects, and some inner flow channels with weak polishing effects or even unable to be polished. The fundamental reason is that there are still certain errors in the initial surface quality, roughness and dimensional accuracy of the inner flow channel structure parts of the same specifications. During batch processing, the polishing medium needs to be diverted in each inner flow channel, and the error will cause the flow rate of the polishing medium in each inner flow channel to be different. Taking the polishing of two inner flow channels of the same specifications as an example, the polishing medium is divided into two streams through a tee and enters the two inner flow channels respectively. The diameter of one of the inner flow channels is slightly larger, so the flow resistance is lower, and the polishing medium flows more smoothly in it, and naturally obtains a slightly higher polishing effect than the other inner flow channel. As polishing progresses, the flow resistance of the inner flow channel with low flow resistance will further decrease. Since the fluid always spontaneously passes through the path with the lowest flow resistance first, the inner flow channel with low flow resistance will be polished very well or even over-polished at first, while the polishing effect of the other inner flow channel will become weaker and weaker until it cannot be polished.

[0024] In view of this, a device is needed that can control the flow velocity or flow rate distribution in a plurality of internal flow channels. It is easy to understand that while controlling the flow velocity or flow rate, the pressure distribution will also be controlled.

[0025] Embodiment 1

[0026] like Figure 1 As shown, this embodiment provides a device for batch polishing an inner flow channel structure using fluid, including: a main input pipeline 10, a diverter valve 20, a plurality of branch output pipelines 30 and a plurality of throttle valves 40.

[0027] In this embodiment, the main input pipeline 10 is connected to a plurality of branch output pipelines 30 via a diverter valve 20 , the output ends of the plurality of branch output pipelines 30 are connected to an inner flow channel structure, and a throttle valve 40 is provided on each branch output pipeline 30 .

[0028] The principle is as follows: the polishing medium enters from the main input pipeline 10, is diverted to several branch output pipelines 30 through the diverter valve 20, and then flows into the inner flow channel structure from the branch output pipeline 30 for polishing, wherein the diverter valve 20 and the throttle valve 40 play the role of controlling the flow rate of the polishing medium flowing into each inner flow channel structure to ensure that the flow rate is stable, constant and consistent, thereby achieving a consistent polishing effect for the inner flow channel structure components of the same specifications.

[0029] It is easy to understand that there is a correlation between flow rate, flow rate and pressure, so the following only uses flow rate as a parameter related to polishing quality or effect for explanation, and the formula is:

[0030] P0=Q0·πr 2 0;(1)

[0031] Q0=v0·πr 2 0;(2)

[0032] Among them, P0 is pressure; Q0 is flow rate; r0 is the radius of the inner section of the pipe; v0 is flow velocity.

[0033] In this embodiment, the inner cross-sectional areas of the plurality of branch output pipelines 30 are the same, the inner cross-sectional area of ​​the total input pipeline 10 is ≥ the sum of the inner cross-sectional areas of the plurality of branch output pipelines 30, and the inner cross-sectional areas of the inner flow channel structures correspondingly connected to the plurality of branch output pipelines 30 are the same, and the formula is:

[0034] A 10 ≥A 31 +A 32 +A 33 +...+A 3n ; (3)

[0035] A 31 =A 32 =A 33 =... =A 3n ; (4)

[0036] A * 1=A * 2=A * 3 = ... = A * n ; (5)

[0037] Among them, A 10 is the internal cross-sectional area of ​​the total input pipeline 10, A 31 ~A 3n A is the inner cross-sectional area of ​​the first to the nth branch output pipelines 30; * 1~A * n are the inner cross-sectional areas of the first to the nth inner flow channel structures, respectively;

[0038] Furthermore, the diverter valve 20 includes a main pipe port and several branch pipe ports, the main pipe port is connected to the main input pipeline 10, each branch pipe port is respectively connected to a branch output pipeline 30, and the inner cross-sectional area of ​​the branch pipe port of the diverter valve 20 is the same as the inner cross-sectional area of ​​the connected branch output pipeline 30.

[0039] Furthermore, the internal cross-sectional area of ​​the total pipe opening of the diverter valve 20 is ≥ the sum of the internal cross-sectional areas of the plurality of branch pipe openings of the diverter valve 20, and the formula is:

[0040] A 20 ≥A 21 +A 22 +A 23 +...+A 2n ; (6)

[0041] A 21 =A 22 =A 23 =... =A 2n ; (7)

[0042] Among them, A 20 A is the internal cross-sectional area of ​​the main pipe opening of the diverter valve 20; 21 ~A 2n They are the inner cross-sectional areas of the first to nth branch pipe openings of the diverter valve 20 , and the inner cross-sectional areas of the first to nth branch pipe openings of the diverter valve 20 are the same.

[0043] The principle is that the fluid polishing technology mainly relies on the pressure and flow grinding of the abrasive particles in the polishing medium on the wall of the inner flow channel for polishing. The polishing medium is diverted through the diverter valve 20 and flows into several branch output pipelines 30 respectively, and flows into several inner flow channel structures accordingly. The internal cross-sectional areas of the several inner flow channel structures are the same. Since the total input pipeline 10 is directly connected to the main pipe port of the diverter valve 20, the internal cross-sectional areas of the total input pipeline 10 and the main pipe port of the diverter valve 20 are also the same.

[0044] When the polishing medium enters the main pipe opening of the diverter valve 20, if the inner cross-sectional area A of the main pipe opening of the diverter valve 20 is 20 If the area of ​​the polishing medium is smaller than the sum of the inner cross-sectional areas of the branch pipe openings of the diverter valve 20, the pressure and flow rate of the polishing medium are mainly concentrated at the main pipe opening of the diverter valve 20. The main pipe opening serves as the input end of the polishing medium for the subsequent pipeline. The pressure of the polishing medium at this position is the highest. At this time, reducing the cross-sectional area will cause the flow rate to increase accordingly, so that the polishing medium mainly polishes the main pipe opening rather than the subsequent internal flow channel structure.

[0045] Preferably, the inner cross-sectional area A of the total pipe opening of the diverter valve 20 is 20 It should also meet the following requirements:

[0046] A 20 ≥k1(A 21 +A 22 +A 23 +...+A 2n ); (8)

[0047] Wherein, k1 is the first coefficient, and the value range of the first coefficient k1 is 1.2 to 1.5.

[0048] That is, the internal cross-sectional area of ​​the total pipe opening of the diverter valve 20 is ≥ k1 times the sum of the internal cross-sectional areas of several branch pipe openings of the diverter valve 20 .

[0049] The principle is that the main pipe port of the diverter valve 20 is connected to the main input pipeline 10, and the internal cross-sectional areas of the two are the same. The main pipe port of the diverter valve 20 is connected to a plurality of branch pipe ports, each of which is connected to a branch output pipeline 30 and has the same internal cross-sectional area as the branch output pipeline 30. It is easy to understand that the sum of the internal cross-sectional areas of the branch pipe ports is smaller than the internal cross-sectional area of ​​the main pipe port. This reduction is conducive to compensating for the attenuation of pressure and flow rate caused by the resistance along the pipeline when the polishing medium flows along the pipeline. However, the sum of the internal cross-sectional areas of the branch pipe ports cannot be too small, because when the sum of the internal cross-sectional areas of the branch pipe ports is too small, it will obviously limit the upper limit of the internal cross-sectional area of ​​the polishing inner flow channel structure, that is, it will make it difficult to achieve the polishing process of the inner flow channel structure with a larger diameter.

[0050] In an optional embodiment, the inner cross-sectional area of ​​the branch output pipeline 30 is greater than or equal to the inner cross-sectional area of ​​the inner flow channel structure, and the formula is:

[0051] A3′ n ≥A * ' n ; (9)

[0052] Among them, A3′ n A is the inner cross-sectional area of ​​any branch output pipeline 30; * ' n is the inner cross-sectional area of ​​any inner flow channel structure.

[0053] Preferably, the inner cross-sectional area A3′ of any branch output pipeline 30 is n It should also meet the following requirements:

[0054] A3′ n =k2·A * ' n ; (10)

[0055] Wherein, k2 is the second coefficient, and the value range of the second coefficient k2 is 1.08 to 1.25;

[0056] That is, the inner cross-sectional area of ​​the branch output pipeline 30 is k2 times the inner cross-sectional area of ​​the inner flow channel structure.

[0057] The principle is that if the inner cross-sectional area of ​​the branch output pipeline 30 is only equal to the inner cross-sectional area of ​​the inner flow channel structure, when the polishing medium flows along the pipeline, the pressure and flow rate attenuation caused by the resistance along the pipeline will affect the polishing efficiency of the inner flow channel structure, resulting in failure to achieve efficient polishing and better polishing effect, that is, in the inner flow channel structure, the polishing medium needs to maintain high pressure and high speed to achieve efficient polishing. Therefore, the inner cross-sectional area of ​​the branch output pipeline 30 needs to be larger than the inner cross-sectional area of ​​the inner flow channel structure, but it cannot be too large, otherwise it will cause the port of the inner flow channel structure to be over-polished, deformed, or even form a bell mouth.

[0058] In this embodiment, a flow-limiting channel is provided in the throttle valve 40 , and the inner cross-sectional area of ​​the flow-limiting channel is ≥ the inner cross-sectional area of ​​the inner channel structure.

[0059] Preferably, the inner cross-sectional area of ​​the flow-limiting channel should also satisfy:

[0060] A4′ n =k3·A * ' n ; (11)

[0061] A 41 =A 42 =A 43 =... =A 4n (12)

[0062] Among them, A4′ n is the inner cross-sectional area of ​​the flow-limiting passage of any throttle valve 40; k3 is the third coefficient; the value range of the third coefficient k3 is 1.05 to 1.18; A 41 ~A 4n They are the inner cross-sectional areas of the flow-limiting passages of the first to the nth throttle valves 40 , respectively.

[0063] That is, the inner cross-sectional area of ​​the flow-limiting channel is k3 times the inner cross-sectional area of ​​the inner channel structure. The principle is to reduce the pressure of the polishing medium and the loss of flow velocity by increasing the inner cross-sectional area to achieve higher polishing efficiency.

[0064] In this embodiment, there is a proportional relationship between the feed pressure of the total input pipeline 10 and the sum of the inner cross-sectional areas of each inner flow channel structure, and the formula is:

[0065] P = k4(A 41 +A 42 +A 43 +...+A 4n ); (13)

[0066]

[0067] Wherein, P is the feed pressure of the total input pipeline 10; k4 is the fourth coefficient, and the fourth coefficient k4 is 0.065; r n ′ is the radius of the inner cross section of the flow restriction passage of any throttle valve 40 .

[0068] That is, the feed pressure of the total input pipeline 10 is k4 times the sum of the inner cross-sectional areas of the plurality of inner flow channel structures.

[0069] In an optional embodiment, limiting the flow through the throttle valve 40 can avoid the problem of inconsistent polishing degree when batch processing multiple inner flow channel structures of the same specification, but as the polishing proceeds, the caliber of the inner flow channel structure will become larger, so the flow rate of the polishing medium dispersed to each inner flow channel structure will decrease accordingly, and the flow rate will also increase accordingly, resulting in a decrease in polishing efficiency. Therefore, when the outlet flow rate of the inner flow channel structure increases by 5%, the feed pressure of the total input pipeline 10 needs to be increased by about 10%. In other words, in terms of polishing efficiency, when the polishing efficiency decreases by 20% to 25% (polishing efficiency is measured in thinning amount per minute), the feed pressure of the total input pipeline 10 needs to be increased accordingly.

[0070] Taking the component 1# with three inner flow channel structures of the same specifications as an example, the inner cross-sectional radius of the inner flow channel structure is 5mm±0.05, and the inner cross-sectional area of ​​the inner flow channel structure is about 78.5mm 2 , taking the third coefficient k3 = 1.10, the inner cross-sectional area of ​​the flow-limiting passage of the throttle valve 40 is 86.35 mm 2 ; Taking the second coefficient k2=1.15, the inner cross-sectional area of ​​the branch output pipeline 30 is 90.275mm, and the inner cross-sectional area of ​​the branch pipe port of the diverter valve 20 is also 90.275mm; further, taking the first coefficient k1=1.3, the inner cross-sectional area of ​​the total pipe port of the diverter valve 20 is 352.0725mm. According to the approximate values ​​of each inner cross-sectional area, the corresponding parts are selected, and the total input pipeline 10, the diverter valve 20, the branch output pipeline 30 and the throttle valve 40 are installed in sequence. The feed pressure of the total input pipeline 10 is set to 15.3MPa, the polishing time is 3h, and the device for batch polishing the inner flow channel structure using fluid in this embodiment is used for polishing. The surface roughness of the three inner flow channel structures obtained is 2.34, 2.32 and 2.33 respectively, the polishing degree is basically the same, and the polishing consistency is good.

[0071] For comparison, component 2# having three inner flow channel structures of the same specifications was used. Its structure and inner cross-sectional dimensions were the same as those of component 1#, and the same processing conditions were set, i.e., the feed pressure of the total input pipeline 10 was 15.3 MPa, and the polishing time was 3 h. However, the device for batch polishing the inner flow channel structures using fluid in this embodiment was not used. The surface roughness of the three inner flow channel structures obtained were 1.87, 2.55 and 4.96, respectively.

[0072] It can be seen that the device of this embodiment for batch polishing inner flow channel structures using fluid has a good effect on improving the quality and consistency of fluid polishing of inner flow channel structures of the same specifications.

[0073] The utility model adopts a device for batch polishing of inner flow channel structures using fluids, and a total input pipeline is connected to a plurality of branch output pipelines via a diverter valve, and a throttle valve is provided on each branch output pipeline, so that the pressure or flow of the polishing medium entering each inner flow channel structure is stable, constant and consistent, thereby achieving a consistent polishing effect for inner flow channel structure components of the same specification.

[0074] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant is intended to cover non-exclusive inclusion, so that the article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or device including the elements. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The orientation or position relationship indicated by "up", "down", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model 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 cannot be understood as a limitation to the utility model.

[0075] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A device for batch polishing an inner flow channel structure using a fluid, characterized in that: include: A main input pipeline (10), wherein the main input pipeline (10) is connected to a plurality of branch output pipelines (30) via a diverter valve (20), and output ends of the plurality of branch output pipelines (30) are all connected to an internal flow channel structure; The inner cross-sectional areas of the plurality of branch output pipelines (30) are the same, and the inner cross-sectional area of ​​the total input pipeline (10) is greater than or equal to the sum of the inner cross-sectional areas of the plurality of branch output pipelines (30); A throttle valve (40) is provided on each of the branch output pipelines (30); a limited flow channel is provided in the throttle valve (40), and the internal cross-sectional area of ​​the limited flow channel is greater than or equal to the internal cross-sectional area of ​​the internal flow channel structure.

2. The device for batch polishing inner flow channel structure using fluid according to claim 1, characterized in that: The inner cross-sectional areas of the inner flow channel structures correspondingly connected to the plurality of branch output pipelines (30) are all the same.

3. The device for batch polishing inner flow channel structure using fluid according to claim 1, characterized in that: The diverter valve (20) comprises a main pipe port and a plurality of branch pipe ports, the main pipe port is connected to the main input pipeline (10), and each of the branch pipe ports is respectively connected to one of the branch output pipelines (30); The internal cross-sectional area of ​​the total pipe opening of the diverter valve (20) is greater than or equal to the sum of the internal cross-sectional areas of the plurality of branch pipe openings of the diverter valve (20).

4. The device for batch polishing inner flow channel structure using fluid according to claim 3, characterized in that: The internal cross-sectional area of ​​the total pipe opening of the diverter valve (20) is ≥ k1 times the sum of the internal cross-sectional areas of a plurality of branch pipe openings of the diverter valve (20); Here, k1 is a first coefficient, and the value range of the first coefficient k1 is 1.2 to 1.

5.

5. The device for batch polishing inner flow channel structure using fluid according to claim 3, characterized in that: The inner cross-sectional area of ​​the branch pipe opening of the diverter valve (20) is the same as the inner cross-sectional area of ​​the connected branch output pipeline (30).

6. The device for batch polishing inner flow channel structure using fluid according to claim 5, characterized in that: The inner cross-sectional area of ​​the branch output pipeline (30) is greater than or equal to the inner cross-sectional area of ​​the inner flow channel structure.

7. The device for batch polishing inner flow channel structure using fluid according to claim 6, characterized in that: The inner cross-sectional area of ​​the branch output pipeline (30) is k2 times the inner cross-sectional area of ​​the inner flow channel structure; Among them, k2 is the second coefficient; the value range of the second coefficient k2 is 1.08 to 1.

25.

8. The device for batch polishing inner flow channel structure using fluid according to claim 7, characterized in that: The inner cross-sectional area of ​​the flow-limiting channel is k3 times the inner cross-sectional area of ​​the inner flow channel structure; Among them, k3 is the third coefficient; the value range of the third coefficient k3 is 1.05 to 1.

18.

9. The device for batch polishing inner flow channel structure using fluid according to claim 1, characterized in that: The feed pressure of the total input pipeline (10) is k4 times the sum of the inner cross-sectional areas of the plurality of inner flow channel structures; Among them, k4 is the fourth coefficient; the fourth coefficient k4 is 0.

065.

10. The device for batch polishing inner flow channel structure using fluid according to claim 9, characterized in that: When the outlet flow rate of the inner flow channel structure increases by 5%, the feed pressure of the total input pipeline (10) increases by 10%.

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