Low-flow-resistance flow dividing and converging tee joint
By designing low-flow-resistance tee joints and branch joints, controlling the flow angle to 20°-30°, and optimizing the pipe structure, the problem of high flow resistance in HVAC water systems was solved, resulting in reduced energy consumption and improved energy efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-10
AI Technical Summary
In existing HVAC water systems, excessive flow resistance in pipe fittings leads to unreasonable energy consumption, especially in small circulating water pump scenarios where the water circulation pipeline design is complex and energy consumption is high.
A low-flow-resistance tee for merging and splitting flow is designed, with the flow angle controlled between 20° and 30° to reduce abrupt changes in fluid direction and lower eddy intensity. The pipe structure is optimized based on fluid dynamics principles, and malleable iron is used as the material and galvanized.
It effectively reduces the flow resistance of the air conditioning water system, reduces energy consumption, and improves the energy efficiency of the water system, making it suitable for small circulating water pump scenarios.
Smart Images
Figure CN223984938U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fluid joint technical field especially relates to low flow resistance branch and combination flow tee. BACKGROUND
[0002] In the HVAC water system, the pipeline components of the water supply and drainage are used, but for the energy saving of the air conditioning water system, the flow resistance of the existing finished pipe fitting is too large, which causes the operation energy consumption and invalid energy consumption of the air conditioning water system to be in an unreasonable state, especially in the case that the single machine is equipped with a small circulating water pump, the design of the water circulating pipeline needs accurate calculation and pipe arrangement, and the branch and combination flow pipe fitting plays a crucial role, and reasonable pipe fitting design can bring obvious effect for the energy saving of the water system. SUMMARY
[0003] The utility model provides low flow resistance branch and combination flow tee, solved the flow resistance of the existing finished pipe fitting is too large, caused the operation energy consumption and invalid energy consumption of air conditioning water system are in the shortcoming of unreasonable state.
[0004] The utility model provides the following technical scheme:
[0005] Low flow resistance branch and combination flow tee, including the main pipe body and branch pipe body that fluid flows, the main pipe body one end is provided with first fluid import / export and is provided with second fluid import / export another end, the branch pipe body and the main pipe body middle part intercommunication forms branch, combination flow interface, the main pipe body with branch pipe body at branch, combination flow interface forms flow state included angle, branch pipe body end is provided with third fluid import / export, first fluid import / export is located flow state included angle closed one side, second fluid import / export is located flow state included angle opening one side, the included angle is 20-30 DEG, and the traditional right angle tee 90 DEG included angle can cause branch pipe fluid to directly hit the main pipe wall surface, forms high speed turbulent flow area, causes energy loss, and 20-30 DEG flow state included angle design makes branch pipe fluid to approach the main pipe axial direction and converges, reduces fluid direction mutation, can reduce vortex intensity, after the included angle reduces, the flow velocity field transition of branch pipe body and main pipe body is more smooth, effectively reduces local resistance.
[0006] In a possible implementation, the flow state included angle is formed by the central axis of the main pipe body and the central axis of the branch pipe body.
[0007] In a possible implementation, the first fluid import / export and the second fluid import / export are equal in size, or the size of the first fluid import / export is greater than the size of the second fluid import / export.
[0008] In a possible implementation, when the size of the first fluid inlet / outlet is greater than the size of the second fluid inlet / outlet, a narrow opening is formed in the middle of the main pipe body, and the flow dividing and combining interface is located between the narrow opening and the first fluid inlet / outlet.
[0009] In a possible implementation, the first fluid inlet / outlet, the second fluid inlet / outlet and the third fluid inlet / outlet are provided as threaded openings to facilitate disconnection.
[0010] In a possible implementation, the main pipe body and the branch pipe body are made of cast steel.
[0011] In a possible implementation, the surfaces of the main pipe body and the branch pipe body are galvanized.
[0012] In a possible implementation, the axis of the branch pipe body is composed of a first straight section, a curved section and a second straight section.
[0013] In a possible implementation, the second straight section of the third fluid inlet / outlet is perpendicular to the axis of the main pipe body.
[0014] It should be understood that the foregoing general description and the following detailed description are only exemplary and are not limiting to the present application.
[0015] In the present application, the low-flow-resistance flow dividing and combining tee is a pipe fitting designed according to the principle of fluid mechanics to reduce the flow resistance of an air conditioning water system. The flow state included angle of the flow dividing and combining tee is between 20º and 30º. The smaller the angle, the better the kinetic energy effect of the branch. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 FIG. 1 is a structural schematic view of a low-flow-resistance flow dividing and combining tee according to an embodiment of the present application.
[0017] Figure 2 FIG. 2 is a structural schematic view of a low-flow-resistance flow dividing and combining tee according to another embodiment of the present application.
[0018] REFERENCE NUMERALS:
[0019] 1, second fluid inlet / outlet; 2, narrow opening; 3, main pipe body; 4, first fluid inlet / outlet; 5, branch pipe body; 6, third fluid inlet / outlet. DETAILED DESCRIPTION
[0020] The embodiments of the present application will be described below with reference to the accompanying drawings.
[0021] In the description of the embodiments of the utility model, it needs to be explained that, unless there is explicit stipulation and limitation, the terms, "connection", "installation" should be understood in a broad sense, for example, "connection" can be detachable connection, also can be inseparable connection, can be direct connection, also can be indirect connection through intermediate medium. In addition, "communication" can be direct communication, also can be indirect communication through intermediate medium. Among them, "fixing" refers to the relative position relationship of each other after connection does not change. The orientation language mentioned in the embodiments of the utility model, for example, "inner", "outer", "top", "bottom" and the like, only refers to the direction of the drawing, therefore, the orientation language used is for better, more clearly illustrating and understanding the embodiments of the utility model, and is not indicated or implied that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation of the embodiments of the utility model.
[0022] In the embodiments of the utility model, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features.
[0023] In the embodiments of the utility model, "and / or" is only a description of the association relationship of the associated object, which means that there can be three kinds of relationships, for example, A and / or B, which can mean that A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.
[0024] In the description of the embodiments of the utility model, "one embodiment" or "some embodiments" and the like mean that in one or more embodiments of the utility model, the specific features, structures or characteristics described in connection with the embodiment are included. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" and the like appearing in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "include but not limited to", unless otherwise specifically emphasized.
[0025] Water supply and drainage systems prioritize flow rate assurance, allowing for higher resistance in pipe components (such as elbows and tees) to simplify construction. However, air conditioning water systems prioritize low-resistance circulation, with pump power directly impacting energy consumption. Traditional pipe fittings can account for 30%-40% of the total resistance in certain areas. In scenarios with single-unit systems and small pumps, using right-angle tees or reducer fittings drastically increases local resistance. Experimental data shows that the resistance coefficient of a right-angle tee is three times that of an angled tee, meaning the pump needs to consume several times more energy to overcome this ineffective resistance. Therefore, a tee fitting specifically designed for air conditioning water systems is needed.
[0026] Specifically, this application provides a low flow resistance tee for branching and merging, which controls the flow angle between the branching and merging tees to be between 20º and 30º. The smaller the angle, the better the effect of utilizing the kinetic energy of the branch.
[0027] Example 1, such as Figure 1 As shown, its main body consists of a main pipe 3 for fluid flow and a branch pipe 5. Both the main pipe 3 and the branch pipe are circular pipes. The upper end of the main pipe 3 is the second fluid inlet / outlet 1, and the lower end of the main pipe 3 is the first fluid inlet / outlet 4. The size of the first fluid inlet / outlet 4 is larger than the size of the second fluid inlet / outlet 1. From the first fluid inlet / outlet 4 to the middle of the main pipe 3, it gradually narrows until the diameter is equivalent to the size of the second fluid inlet / outlet 1, thus forming a narrow opening 2 in the middle of the main pipe 3.
[0028] A branch pipe 5 is connected to the section from the first fluid inlet / outlet 4 to the middle of the main pipe 3, which gradually narrows. The axis of the branch pipe 5 forms an acute angle with the axis of the main pipe 3, and the acute angle is 20°-30°. In this embodiment, the acute angle is 20°.
[0029] The branch pipe 5 is connected to the middle of the main pipe 3 to form a branch and merge interface. The branch and merge interface is located at the narrow opening 2 and faces the first fluid inlet / outlet 4. The main pipe 3 and the branch pipe 5 form a flow angle at the branch and merge interface. The branch pipe 5 includes a continuous first direct flow section, a curved section, and a second direct flow section. A third fluid inlet / outlet 6 is formed at the end of the second direct flow section. The axis of the first direct flow section is set at a 20° angle with the axis of the main pipe 3. The diameter of the branch pipe 5 and the third fluid inlet / outlet 6 remain unchanged.
[0030] The first fluid inlet / outlet 4, the second fluid inlet / outlet 1, and the third fluid inlet / outlet 6 are provided with threaded openings for easy connection and disconnection.
[0031] Example 2, as Figure 2 As shown, the only difference from Embodiment 1 is that in Embodiment 2, the diameters of the first fluid inlet / outlet 4 and the second fluid inlet / outlet 1 of the main body 3 are equal.
[0032] The specific size is shown in the following table:
[0033]
[0034] The pipe fittings are made of malleable steel by manufacturing process, the sealing pipe threads and the relief groove are made by machining, the finished product is subjected to galvanizing anti-rust treatment, and the production should comply with relevant national standards.
[0035] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application; in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A low flow resistance diverging / converging tee, comprising a main pipe body for fluid flow and a branch pipe body, the main pipe body being provided with a first fluid inlet / outlet at one end and a second fluid inlet / outlet at the other end, the branch pipe body being in communication with the main pipe body at a middle portion to form a diverging / converging flow interface, the main pipe body and the branch pipe body forming a flow state included angle at the diverging / converging flow interface, characterized in that, The branch pipe body is provided with a third fluid inlet / outlet at the end; the first fluid inlet / outlet is located at one side of the closed flow angle, the second fluid inlet / outlet is located at one side of the opened flow angle, the angle is 20-30°, the size of the first fluid inlet / outlet is larger than that of the second fluid inlet / outlet, the middle part of the main pipe body is formed into a narrow opening, and the branch flow interface is located between the narrow opening and the first fluid inlet / outlet.
2. The low flow resistance combined flow and drain tee according to claim 1, characterized in that The flow angle is formed by the central axis of the main pipe body and the central axis of the branch pipe body.
3. The low flow resistance combined flow and drain tee according to claim 1, characterized in that The first fluid inlet / outlet, the second fluid inlet / outlet and the third fluid inlet / outlet are provided with screw threads to facilitate disconnection.
4. The low resistance flow dividing and combining tee of claim 1 wherein, The main pipe body and the branch pipe body are made of malleable steel.
5. The low resistance flow dividing and combining tee of claim 1 wherein, The main pipe body and the branch pipe body are galvanized.
6. The low resistance diverging spool tee of claim 1, wherein, The central axis of the branch pipe body is composed of a first straight section, a curved section and a second straight section.
7. The low resistance diverging spool tee of claim 1, wherein, The central axis of the second straight section of the third fluid inlet / outlet is perpendicular to the central axis of the main pipe body.