Low-flow-resistance liquid supply adjusting structure

Abstract

The utility model relates to the technical field of centralized liquid supply, in particular to a low-flow-resistance liquid supply adjusting structure which comprises a first liquid supply pipe, a second liquid supply pipe and a connecting pipe, the connecting pipe is provided with a basic pipe body and a variable-diameter pipe body, the variable-diameter pipe body is fixedly connected to one end of the basic pipe body, flanges are fixedly connected to the outer side of the variable-diameter pipe body and the outer side of the basic pipe body, and the flanges are fixedly connected to the outer side of the variable-diameter pipe body. The end, away from the reducing pipe body, of the basic pipe body penetrates through a flange fixedly connected to the basic pipe body to form an insertion section. The inner side of the basic pipe body insertion section is fixedly connected with a throttling plate. By optimizing the connection between the connecting pipe and the liquid supply pipe and arranging the reducing part, the situation of sharp change of the section of the flow channel is relieved, the volume of a static pressure area is also occupied by the arrangement of the reducing part, therefore, the kinetic energy loss of the stock solution in the flowing process is reduced, the flow resistance of the liquid supply adjusting structure is reduced, and the burden of the liquid supply pump is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of centralized liquid supply, and in particular to a low flow resistance liquid supply regulating structure. Background Art

[0002] The liquid supply regulating structure is an indispensable component in the centralized liquid supply system. The throttle hole is a common liquid supply regulating component. In the centralized liquid supply system, the throttle hole is set to destroy the laminar flow of the fluid in the original pipeline and transform it into turbulent flow, so that the fluid in the liquid supply pipeline is fully mixed.

[0003] The existing throttle hole assembly generally includes a hollow connector with two ends that can be connected to the liquid supply pipe, a throttle plate is arranged inside the hollow connector, and a throttle hole is opened on the throttle plate. As shown in the Chinese utility model patent applications with publication numbers CN219571236U and CN206669209U, after the adjustment assembly is connected to the two liquid supply pipes, the connection between the liquid supply pipe and the hollow connector will cause the flow channel to change, and the fluid in the liquid supply pipe directly hits the outer edge area of ​​the throttle plate, which will cause kinetic energy loss of the fluid in the liquid supply pipe, which is manifested as a large flow resistance of the liquid supply adjustment structure, thereby increasing the burden on the liquid supply pump. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present application provides a low flow resistance liquid supply regulating structure. The embodiment of the present application alleviates the situation of sudden change of flow channel cross section by optimizing the connection between the connecting pipe and the liquid supply pipe and setting a reducing portion. The setting of the reducing portion also occupies the volume of the static pressure zone, thereby reducing the kinetic energy loss of the original liquid during the flow process, reducing the flow resistance of the liquid supply regulating structure, and thus reducing the burden on the liquid supply pump.

[0005] The above application objectives of this application are achieved through the following technical solutions:

[0006] A low flow resistance liquid supply regulating structure comprises a first liquid supply pipe, a second liquid supply pipe and a connecting pipe, wherein the connecting pipe comprises a basic pipe body and a reducing pipe body, wherein the reducing pipe body is fixedly connected to one end of the basic pipe body, flanges are fixedly connected to the outer sides of the reducing pipe body and the basic pipe body, and an end of the basic pipe body away from the reducing pipe body passes through the flange fixedly connected to the basic pipe body to form an insertion section;

[0007] A throttle plate is fixedly connected to the inner side of the insertion section of the basic tube body, a throttle hole is opened on the throttle plate, a first fixing ring for fixing the basic tube body is fixedly connected to the end of the throttle plate away from the variable diameter tube body, the first fixing ring is fixedly connected to the inner side of the insertion section of the basic tube body, the inner side of the end of the insertion section away from the variable diameter tube body has a reducing portion, the diameter of the reducing portion gradually increases along the direction from the variable diameter tube body to the basic tube body, the inner side surface of the first fixing ring is coplanar with the inner curved surface of the reducing portion, and the inner curved surface of the reducing portion intersects with the end face of the throttle plate away from the variable diameter tube body;

[0008] In the assembled state, the first liquid supply pipe and the second liquid supply pipe are respectively connected to the basic pipe body and the reducer pipe body of the connecting pipe through flanges, and the basic pipe body insertion section is plugged into the inner side of the first liquid supply pipe.

[0009] Optionally, the first fixing ring is a condensed mass formed by cooling down the melted welding material during the process of welding the throttle plate to the inner side of the insertion section.

[0010] Optionally, a second fixing ring for fixing the basic tube body is fixed to one side of the throttle plate close to the variable diameter tube body, and the inner edge line of the end face of the second fixing ring close to the throttle plate is not tangent to or intersects with any edge line of the throttle hole.

[0011] Optionally, the second fixing ring is a condensed mass formed when the melted welding material cools down during the welding of the throttle plate on the inner side of the insertion section.

[0012] Optionally, the inner diameter of the second fixing ring gradually increases along the direction where the throttle plate approaches the variable diameter tube body.

[0013] Optionally, the inner diameter of the end of the basic tube body close to the variable diameter tube body is consistent with the inner diameter of the portion of the basic tube body intercepted by the throttle plate.

[0014] Optionally, the diameter of the variable diameter tube body gradually increases in a direction in which the variable diameter tube body moves away from the basic tube body.

[0015] In summary, this application has the following beneficial technical effects:

[0016] The embodiment of the present application alleviates the situation of sudden change in flow channel cross-section by optimizing the connection between the connecting pipe and the liquid supply pipe and setting a reducing portion. The setting of the reducing portion also occupies the volume of the static pressure zone, thereby reducing the kinetic energy loss of the original liquid during the flow process, reducing the flow resistance of the liquid supply regulating structure, and thus reducing the burden on the liquid supply pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional schematic diagram of a throttle plate and a pipeline in the prior art;

[0018] Figure 2 It is a schematic diagram of a throttle plate obstructing a raw liquid flow path in the prior art;

[0019] Figure 3 It is a schematic diagram of the speed of the raw liquid during its travel and the static pressure zone generated by the raw liquid before passing through the throttle plate in the prior art;

[0020] Figure 4 It is an assembly schematic diagram of an implementation method of the present application;

[0021] Figure 5 is a schematic diagram of a connecting pipe according to an embodiment of the present application;

[0022] Figure 6 This is a schematic diagram of processing of a diameter reducing portion in one embodiment of the present application;

[0023] Figure 7 It is a schematic diagram of the static pressure zone generated by the raw liquid after passing through the throttle plate in the prior art;

[0024] Figure 8 It is a schematic diagram of a second fixing ring according to an embodiment of the present application.

[0025] Figure numerals: 10, liquid supply pipe 1; 20, liquid supply pipe 2; 30, connecting pipe; 31, basic pipe body; 32, reducing pipe body; 33, insertion section; 34, throttle plate; 35, throttle hole; 36, first fixing ring; 37, second fixing ring. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the accompanying drawings.

[0027] In order to more clearly understand the technical solution presented in the embodiments of the present application, a brief introduction is first given to the composition and specific usage scenarios of the existing liquid supply regulating structure.

[0028] In the centralized liquid supply system in the chemical industry and the centralized liquid supply system in the machining industry, a liquid supply regulating structure with a throttling orifice plate is commonly used. The proportioned liquid chemical raw materials or the proportioned machining coolant are supplied to specific production equipment through the liquid supply pipeline. The raw liquid in the liquid supply pipe will change from laminar flow to turbulent flow after passing through the throttling orifice plate, so that the proportioned raw liquid is always in a good mixed state;

[0029] Since the stock liquid has been mixed before being transported, the throttling orifice plate is only set to avoid the problem of uneven mixing caused by the different densities of the components in the stock liquid. Under ideal conditions, the stock liquid in the liquid supply pipeline is in a laminar state before and after passing through the throttling plate, and is in a turbulent state only when passing through the throttling plate to fully mix the stock liquid. Except for the kinetic energy dissipation caused by the change in the flow state of the stock liquid, there is no other kinetic energy dissipation. The aforementioned ideal environment can effectively reduce the kinetic energy loss of the stock liquid during transportation and reduce the burden on the liquid supply pump;

[0030] However, after the existing liquid supply regulating assembly with a throttle plate is installed on the liquid supply pipe, the liquid supply pipe will first pass through the connection between the liquid supply regulating assembly and the liquid supply pipe before passing through the throttle plate. The aforementioned connection will cause the flow channel to change, thereby converting part of the dynamic pressure of the fluid into static pressure. The existing throttle plate is generally perpendicular to the central axis of the connecting pipe of the liquid supply regulating assembly. The raw liquid directly hits the throttle plate, further converting part of the dynamic pressure of the fluid into static pressure, increasing the kinetic energy dissipation of the raw liquid, and increasing the burden on the liquid supply pump;

[0031] Specifically, if Figure 1 , Figure 2 and Figure 3 As shown, Figure 1 It is a cross-sectional diagram of the pipeline, and its cutting plane is perpendicular to the central axis of the pipeline. When the fluid hits the throttle plate, the impact Figure 2 The kinetic energy dissipation of the raw liquid at the outer edge shown by the shadow part of the middle throttle plate is more serious. From the perspective of the raw liquid flow direction, Figure 3 As shown, Figure 3 It is a schematic diagram of the velocity of liquid flowing in the pipe. The velocities v1, v2, v3, and v4 in the figure increase in sequence. Figure 3 Two static pressure areas are marked in Figure 2 In the shaded part, the original liquid loses kinetic energy here because the flow channel cross-section changes drastically. The reason for the kinetic energy dissipation at the connection between the liquid supply regulating component and the liquid supply pipe is also as mentioned above.

[0032] In order to solve the above technical problems, refer to Figure 4 and Figure 5 The embodiment of the present application provides a low flow resistance liquid supply regulating structure, including a connecting pipe 30, a liquid supply pipe 10 and a liquid supply pipe 20, wherein the liquid supply pipe 10 is used to supply liquid to the connecting pipe 30, and the liquid supply pipe 20 is used to receive the original liquid passing through the connecting pipe 30. In the assembled state, the liquid supply pipe 10 and the liquid supply pipe 20 are respectively fixedly connected to the two ends of the connecting pipe 30;

[0033] The connecting pipe 30 comprises a basic pipe body 31 and a reducing pipe body 32. The reducing pipe body 32 is fixedly connected to one end of the basic pipe body 31. Flanges are fixedly connected to the outer sides of the reducing pipe body 32 and the basic pipe body 31. One end of the basic pipe body 31 away from the reducing pipe body 32 passes through the flange fixedly connected to the basic pipe body 31 to form an insertion section 33. In the assembled state, the insertion section 33 of the basic pipe body 31 is inserted into the liquid supply pipe 10. The flange on the outer side of the liquid supply pipe 10 abuts against the flange on the basic pipe body 31, and the flange on the outer side of the liquid supply pipe 20 abuts against the flange on the reducing pipe body 32.

[0034] A throttle plate 34 is fixedly connected to the inner side of the insertion section 33 of the basic tube body 31, and a throttling hole 35 is opened on the throttle plate 34. A first fixing ring 36 for fixing the basic tube body 31 is fixedly connected to the end of the throttle plate 34 away from the reducer tube body 32. The fixing ring is fixedly connected to the inner side of the insertion section 33 of the basic tube body 31. The inner side of the end of the insertion section 33 away from the reducer tube body 32 has a reducing portion. The diameter of the reducing portion gradually increases in the direction from the reducer tube body 32 to the basic tube body 31. The inner side surface of the fixing ring is coplanar with the inner curved surface of the reducing portion, and the inner curved surface of the reducing portion intersects with the end face of the throttle plate 34 away from the reducer tube body 32.

[0035] The following is a further introduction based on specific usage scenarios.

[0036] When in use, the operator installs the connecting pipe 30 equipped with the throttle plate 34 between the liquid supply pipe 1 10 and the liquid supply pipe 2 20, ensuring that the insertion section 33 of the connecting pipe 30 is inserted only into the liquid supply pipe 1 10.

[0037] After the liquid supply pipe 10 and the liquid supply pipe 2 20 are connected to the connecting pipe 30 through the flange, the operator can turn on the liquid supply pump to supply liquid to each production device.

[0038] The raw liquid enters the connecting tube 30 through the liquid supply tube 10. Since the insertion section 33 of the connecting tube 30 is inserted into the liquid supply tube 10, and the inner side of the insertion section 33 of the connecting tube 30 has a gradually expanding reducing portion, the flow path of the raw liquid when entering the connecting tube 30 changes more evenly, the situation of sudden change of the flow path cross section is improved, and the kinetic energy dissipation of the raw liquid flow is reduced;

[0039] In the embodiment of the present application, the diameter-changing portion includes a diameter-changing ring on the side of the throttle plate 34 away from the diameter-changing tube body 32, and the diameter-changing portion is substantially filled with Figure 3 The static pressure area shown in the figure occupies the volume of the static pressure area of ​​the raw liquid, so that when the raw liquid flows, the kinetic energy of the raw liquid caused by hitting the throttle plate 34 is converted into a ratio of static pressure, thereby reducing the kinetic energy dissipation of the raw liquid flow.

[0040] In general, the embodiment of the present application alleviates the situation of sudden change in flow channel cross-section by optimizing the connection between the connecting pipe 30 and the liquid supply pipe and setting a reducing portion. The setting of the reducing portion also occupies the volume of the static pressure zone, thereby reducing the kinetic energy loss of the original liquid during the flow process and reducing the burden on the liquid supply pump.

[0041] It should be noted that when installing the liquid supply pipe 10 and the liquid supply pipe 2 20 , they should be sealed with the connecting pipe 30 .

[0042] In some possible implementations of the embodiments of the present application, the basic tube body 31 and the reducing tube body 32 are integrally formed, and one end of the seamless tube with continuous and consistent outer diameters and inner diameters is expanded to form a connecting tube 30 having the basic tube body 31 and the reducing tube body 32.

[0043] Reference Figure 6 In the embodiment of the present application, the first fixing ring 36 is a condensed block formed by cooling the melted welding material during the welding of the throttle plate 34 on the inner side of the insertion section 33. The reducing portion can be formed by first welding the throttle plate 34 and the insertion section 33, and then using a boring tool to cut the weld and the inner side of the insertion section 33 to form a gradually expanding reducing portion. In this way, the throttle plate 34 can be fixed more firmly by welding, and the subsequent cutting can also make the weld smoother and eliminate the uneven stress part, while also making the weld and the inner side of the basic tube body 31 merge more smoothly.

[0044] From the above perspective, in the embodiment of the present application, the diameter-changing portion substantially includes a weld formed after the welding material solidifies, that is, the first fixing ring 36. While fixing the throttle plate 34 more firmly, the first fixing ring 36 does not cause much influence on the flow channel.

[0045] As a feasible specific implementation method of the present application embodiment, refer to Figure 8 A second fixing ring 37 for fixing the basic tube body 31 is fixedly connected to one side of the throttle plate 34 close to the reducer tube body 32. The second fixing ring 37 may be a condensed block formed after the melted welding material cools down during the welding of the throttle plate 34 to the inner side of the insertion section 33. The inner edge of the end face of the second fixing ring 37 close to the throttle plate 34 is not tangent to or intersects with any edge of the throttling hole 35, that is, the second fixing ring 37 does not obstruct the throttling hole 35.

[0046] Combined with a specific usage scenario, such as Figure 7 As shown, Figure 7 It can be found that except Figure 3 In addition to the static pressure area in the throttle plate 34, the end of the throttle plate 34 close to the reducer tube 32 also has a static pressure area. After the fluid passes through the throttle plate 34, Figure 7 The flow rates of the two static pressure zones shown in FIG. 1 are approximately equal to the background flow rate v1. The kinetic energy of the stock solution is partially converted into pressure potential energy here, thereby dissipating the kinetic energy of the stock solution. In this embodiment, Figure 7 A second fixed ring 37 formed by welding is arranged at the position shown in the middle static pressure zone, which not only strengthens the stability of the throttle plate 34, but also occupies Figure 7 The position shown in the middle static pressure area, thereby reducing the kinetic energy dissipation of the raw liquid;

[0047] In actual use, the welding here can be followed by lathe processing to change the surface roughness of the weld formed by welding. In particular, when the welding is completed, the inner diameter of the second fixed ring 37 can be gradually increased along the direction of the throttle plate 34 close to the reducer tube body 32, so that its inner diameter forms a gradual expansion type, reducing the change in the original liquid flow channel.

[0048] As a feasible specific implementation method of the embodiment of the present application, the end of the basic tube body 31 close to the variable diameter tube body 32 is consistent with the inner diameter of the part of the basic tube body 31 intercepted by the throttle plate 34, thereby reducing the change rate of the raw liquid flow channel and reducing the kinetic energy dissipation of the raw liquid during flow.

[0049] As a feasible specific implementation of the embodiment of the present application, the diameter of the reducer 32 gradually increases in the direction in which the reducer 32 moves away from the basic tube 31. When the raw liquid flows to the reducer 32, the flow path changes, and the connection between the liquid supply pipe 20 and the connecting pipe 30 is located at one end of the reducer 32. In the case of using the sequence of the fluid flow path, the embodiment of the present application uses the gradually expanding reducer 32 in the rear position, which reduces the time required for the fluid flow to flow. Figure 7 The volume of the static pressure zone shown reduces the ratio of the dynamic pressure of the raw liquid to the static pressure. In addition, the gradually expanding tube body is directly connected to the liquid supply pipe 20, so that the area of ​​turbulence of the raw liquid fluid caused by the change of the flow channel is limited to the vicinity of the gradually expanding variable diameter tube body 32, thereby reducing the area length and number of times of kinetic energy dissipation of the raw liquid fluid in the overall liquid supply pipeline, thereby reducing the total kinetic energy dissipation of the raw liquid.

[0050] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low flow resistance liquid supply regulating structure, characterized in that: The invention comprises a first liquid supply pipe, a second liquid supply pipe and a connecting pipe, wherein the connecting pipe comprises a basic pipe body and a reducing pipe body, wherein the reducing pipe body is fixedly connected to one end of the basic pipe body, flanges are fixedly connected to the outer sides of the reducing pipe body and the basic pipe body, and an end of the basic pipe body away from the reducing pipe body passes through the flange fixedly connected to the basic pipe body to form an insertion section; A throttle plate is fixedly connected to the inner side of the insertion section of the basic tube body, a throttle hole is opened on the throttle plate, a first fixing ring for fixing the basic tube body is fixedly connected to the end of the throttle plate away from the variable diameter tube body, the first fixing ring is fixedly connected to the inner side of the insertion section of the basic tube body, the inner side of the end of the insertion section away from the variable diameter tube body has a reducing portion, the diameter of the reducing portion gradually increases along the direction from the variable diameter tube body to the basic tube body, the inner side surface of the first fixing ring is coplanar with the inner curved surface of the reducing portion, and the inner curved surface of the reducing portion intersects with the end face of the throttle plate away from the variable diameter tube body; In the assembled state, the first liquid supply pipe and the second liquid supply pipe are respectively connected to the basic pipe body and the reducer pipe body of the connecting pipe through flanges, and the basic pipe body insertion section is plugged into the inner side of the first liquid supply pipe.

2. A low flow resistance liquid supply regulating structure according to claim 1, characterized in that: The first fixing ring is a condensed mass formed by cooling down the melted welding material during the welding of the throttle plate on the inner side of the insertion section.

3. A low flow resistance liquid supply regulating structure according to claim 1, characterized in that: A second fixing ring for fixing the basic tube body is fixedly connected to one side of the throttle plate close to the variable diameter tube body, and the inner side edge line of the end surface of the second fixing ring close to the throttle plate is not tangent to or intersects with any throttle hole edge line.

4. A low flow resistance liquid supply regulating structure according to claim 3, characterized in that: The second fixing ring is a condensed mass formed by cooling down the melted welding material during the welding of the throttle plate on the inner side of the insertion section.

5. A low flow resistance liquid supply regulating structure according to claim 3, characterized in that: The inner diameter of the second fixing ring gradually increases along the direction of the throttle plate approaching the variable diameter pipe body.

6. A low flow resistance liquid supply regulating structure according to claim 1, characterized in that: One end of the basic tube body close to the variable diameter tube body is consistent with the inner diameter of the part of the basic tube body intercepted by the throttle plate.

7. A low flow resistance liquid supply regulating structure according to claim 1, characterized in that: The diameter of the reducer pipe body gradually increases in the direction in which the reducer pipe body moves away from the basic pipe body.

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