A pipe connection structure for refrigeration equipment and its assembly and manufacturing method

Abstract

The invention provides a pipe connection structure for refrigeration equipment, including a first pipe body, a second pipe body connected to the first pipe body, and a transition support unit between the two. The closed end of the transition support unit is an outwardly protruding arc surface structure. The invention has an ingenious structural design. Through simple assembly and production, a corresponding connection structure can be obtained. Even if the pipeline is long and has many bends, the flow rate loss is very small, which can maximize the refrigeration effect. Compared with the existing technical products, the energy consumption of the refrigeration equipment when achieving the same refrigeration effect is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigeration equipment accessories, and in particular relates to a pipe fitting connection structure for refrigeration equipment. Background Art

[0002] In the existing refrigeration field, the pipe fittings of compressors and other related equipment are usually made of copper, but copper pipes are prone to deformation, especially when the pipes are arranged over a long distance. Affected by the installation method, the pipe length, pipe deformation, and the bending corners of the pipe arrangement all have an impact on the refrigeration effect. In addition, for variable flow pipes, the pipe body and transition piece are often prefabricated into an integrated structure, which has a difficult manufacturing process, high cost, and poor adaptability to on-site working conditions, and cannot achieve a reasonable match with the use conditions. Whether from the perspective of cost or construction, there is a need for improvement. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a pipe connection structure for refrigeration equipment, which can be quickly assembled and manufactured on site, is easy to manufacture, has low cost, and effectively ensures the refrigeration effect of the equipment.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A pipe connection structure for refrigeration equipment, comprising a first pipe body, a second pipe body connected to the first pipe body, and a transition support unit between the first pipe body and the second pipe body; a flared portion is provided at the tail end of the first pipe body; and a constricted portion is provided at the second pipe body corresponding to the flared portion.

[0006] The transition support unit is cylindrical, and one end of the transition support unit located inside the second tube body is a closed structure; the main structure of the transition support unit is arranged in the second tube body necking portion, and the flared eaves structure of the transition support unit is folded outward and wrapped around the end of the second tube body necking portion, forming a sealing ring structure on the outer wall of the necking portion, and at the same time, a plurality of hollow holes are provided on the flared eaves structure;

[0007] The transition support unit is provided with an outward annular protrusion structure, and the cross section of the annular protrusion structure is in an arc shape, so that the second tube body forms an outlet structure that gradually narrows first and then gradually widens.

[0008] Furthermore, the total area of ​​each hollow hole is larger than the area of ​​the closed solid part on the expanded eaves.

[0009] Furthermore, a second tube body recessed structure facing inward is provided on the necked portion of the second tube body at a position corresponding to the raised structure of the transition support unit.

[0010] Furthermore, a first tube body recessed structure facing inward is provided on the expanded portion of the first tube body at a position corresponding to the raised structure of the transition support unit.

[0011] Furthermore, a rectifying adjustment member is installed in the hollow hole.

[0012] Furthermore, the rectifying and adjusting member is a rolled sheet that is punched inwardly when the hollow hole is made.

[0013] Furthermore, the directions in which the roll pieces are bent toward the inside of the rectifying and adjusting member are different.

[0014] Furthermore, the closed end of the transition support unit is in an outwardly protruding arc surface structure.

[0015] A method for assembling and manufacturing the above-mentioned pipe connection structure for refrigeration equipment comprises the following steps:

[0016] The cylinder is expanded to form an expanded eaves structure at its opening, and an annular convex structure is processed on the inner side of the expanded eaves of the cylinder to form a transition support unit;

[0017] Punching the expanded eaves to form a number of hollow holes, and forming a roll of the solid structure of the punched hollow holes;

[0018] Insert the closed end of the transition support unit into the necked portion of the second tube body, and turn the flared eaves structure outward to wrap around the outer wall of the second tube body to form a sealing ring structure;

[0019] Insert one end of the transition support unit into the expanded portion of the first tube body, so that the inner wall of the transition section of the expanded portion of the first tube body squeezes the sealing ring structure to achieve a tight fit;

[0020] A portion of the outer wall of the expanded portion of the first tube body roughly corresponding to the annular protruding structure on the transition support unit is pressed into a concave structure.

[0021] Furthermore, the first tube body is clamped 2-3 times with a clamp to form 4 or 6 recessed areas, and the recessed areas are roughly evenly distributed.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The invention has an ingenious structural design. Through simple assembly and production, a corresponding connection structure can be obtained, which can be applied to the transition connection between pipes when the pipeline is extended. The transition support unit not only improves the strength of the connection structure, but also increases the flow rate (flow velocity) of the liquid / gas refrigerant transported in the pipeline. In the pipeline using this connection structure, even if the pipeline is long and has many bends, the flow rate loss is very small, which maximizes the cooling effect. Compared with the existing technical products, it reduces the energy consumption of the refrigeration equipment when achieving the same cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0025] Figure 1 A schematic diagram of the structure created by the present invention;

[0026] Figure 2 This is a schematic diagram of a second tube body provided with a transition support unit in the invention;

[0027] Figure 3 This is a schematic diagram of the structure of the first tube body in the invention;

[0028] Figure 4 This is a structural schematic diagram of the present invention when both the first and second tube bodies are provided with a recessed structure;

[0029] Figure 5 for Figure 4 A schematic structural diagram of the second tube body portion;

[0030] Figure 6 A schematic diagram of the structure of a transition support unit in an embodiment of the present invention;

[0031] Figure 7 A schematic diagram of the first tube portion when a sealing ring is provided in an embodiment of the present invention;

[0032] Figure 8 A schematic diagram of the first tube body and the second tube body being welded and fixed in an embodiment of the present invention;

[0033] Fig. 9 This is a schematic diagram of the structure when the present invention creates an application state.

[0034] Description of reference numerals:

[0035] 1-first tube body; 2-second tube body; 3-transition support unit; 4-expanding portion; 5-reducing portion; 6-expanding eaves structure; 7-sealing ring structure; 8-hollow hole; 9-annular raised structure; 10-exit structure; 11-outer opening; 12-inner opening; 13-second tube body recessed structure; 14-first tube body recessed structure; 15-rectifier adjustment member; 16-rolling sheet; 17-arc surface structure; 18-sealing ring; 19-weld; 20-joint. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] A pipe connection structure for refrigeration equipment, such as Figures 1 to 9 As shown, it includes a first tube body 1, a second tube body 2 connected to the first tube body, and a transition support unit 3 therebetween; a flared portion 4 is provided at the tail end of the first tube body; a necked portion 5 is provided at the corresponding flared portion of the second tube body; the flared portion of the first tube body, the necked portion of the second tube body, and the transition support unit can be processed in a workshop before on-site assembly, so as to facilitate on-site production and assembly.

[0041] The transition support unit is cylindrical, and one end of the transition support unit located inside the second tube body is a closed structure; the main structure of the transition support unit is arranged in the second tube body necking portion, and the flared eaves structure 6 is folded outward and wrapped around the end of the second tube body necking portion, forming a sealing ring structure 7 on the outer wall of the necking portion, and at the same time, a plurality of hollow holes 8 are provided on the flared eaves structure;

[0042] The transition support unit is provided with an outward annular protrusion structure 9, and the cross section of the annular protrusion structure is in an arc shape (i.e., the surface facing the inner wall of the second tube body is in an arc shape), so that the second tube body forms an outlet structure 10 that gradually narrows and then gradually widens. It is this special outlet structure design that enables the pipe fitting to form a Venturi effect at the outlet structure part during use, whether it is used to deliver liquid or gas, which can not only effectively compensate for the pressure or flow loss caused by the pipeline layout, but also can be expanded to variable flow conditions.

[0043] The total area of ​​each hollow hole is larger than the area of ​​the closed solid part on the expanded eaves. At the same time, in order to ensure the Venturi effect, the total area of ​​each hollow hole is larger than the cross-sectional area of ​​the minimum opening gap part (annular protruding structure) of the transition support unit. In this embodiment, the minimum gap at the protruding structure (middle) is used as the boundary, and the outer opening 11 close to the outlet side (the gap between the cylinder and the second tube body) is larger than the inner opening 12 on the inner side (the gap between the cylinder and the second tube body). In a specific embodiment, the total area of ​​each hollow hole is 1.3-1.8 times the cross-sectional area of ​​the minimum opening gap part of the transition support unit.

[0044] In an optional embodiment, if Figure 4 and Figure 5 As shown, the second tube body concave structure 13 is provided inwardly at the convex structure of the transition support unit on the necking portion of the second tube body. Together with the annular convex structure on the transition support unit, an outlet structure that narrows first and then widens is formed. In this embodiment, a further preferred solution is that the first tube body concave structure 14 is provided inwardly at the convex structure of the transition support unit on the flaring portion of the first tube body. Matching with the second tube body concave structure, the first and second tube bodies are effectively connected and fixed, and at the same time, a structural basis can be provided for rapid on-site assembly.

[0045] A rectifying adjustment member 15 is installed in the hollow hole. In an optional embodiment, Figure 6 As shown, the rectifying and adjusting member is a rolled sheet 16 that is punched inward when making the hollow hole.

[0046] Specifically, the directions in which the coils are bent toward the inside of the rectifying adjustment member are different, the blocking effect of the coils is more effective, the turbulence effect is better, the flow rate of the refrigerant and water is increased, and a larger Reynolds number can be obtained. In this embodiment, the preferred way is that the hollow holes are arranged at unequal intervals, and the hollow holes are of different sizes and shapes, which can more effectively form turbulence.

[0047] The closed end of the transition support unit is a curved surface structure 17 that protrudes outward (toward the end where liquid / gas enters the second tube body), thereby reducing the resistance of the transmitted liquid / gas before entering the outlet structure.

[0048] A method for assembling and manufacturing the above-mentioned pipe connection structure for refrigeration equipment comprises the following steps:

[0049] The end of the first tube body used for connection is expanded to form an expanded portion, and the end of the second tube body used for connection with the first tube body is narrowed to form a narrowed portion;

[0050] The cylinder is expanded to form an expanded eave structure 6 at its opening, and an annular protrusion structure 9 is processed on the inner side of the expanded eave on the cylinder to form a transition support unit;

[0051] The expanded eaves are punched to form a plurality of hollow holes 8, and the solid structure of the punched hollow holes is formed into a rolled sheet;

[0052] In fact, the expanded portion of the first tube body, the contracted portion of the second tube body, and the transition support unit are generally processed and formed in advance, which is convenient for on-site production and assembly.

[0053] During the on-site specific assembly and production,

[0054] Insert the closed end of the transition support unit into the necked portion of the second tube body, and turn the flared eaves structure outward to wrap around the outer wall of the second tube body to form a sealing ring structure 7;

[0055] Insert one end of the transition support unit into the expanded portion of the first tube body, so that the inner wall of the transition section of the expanded portion of the first tube body squeezes the sealing ring structure to achieve a tight fit;

[0056] A portion of the outer wall of the expanded portion of the first tube body roughly corresponding to the annular protruding structure on the transition support unit is pressed into a concave structure.

[0057] It should be noted that the uneven parts are polished. In fact, since the material with good ductility (such as copper material) is used, it is not even necessary to perform fine processing. After being assembled into the first tube body and properly squeezed, a fitting effect is achieved and sealing is realized. In order to further improve the sealing performance, in a specific implementation method, as Figure 7 As shown, a sealing ring 18 can also be put on the part of the second tube body outlet corresponding to the expanded eaves and wrapped outwardly, and the sealing ring is on the inner side to enhance the sealing effect of the sealing ring structure.

[0058] A specific implementation method is to use a clamp to clamp the first tube body 2-3 times, then 4 or 6 recessed areas can be formed under the action of the two clamps on the clamp head. These recessed areas correspond to the outer wall of the tube body, namely, the first tube body recessed structure and the second tube body recessed structure. During the clamping operation, it is roughly ensured that the recessed areas are closely spaced, that is, they are roughly evenly distributed along the circumferential direction of the first tube body wall.

[0059] It should be emphasized that, according to the actual application conditions, when the pipeline pressure is relatively high, welding can be performed at the connection between the first pipe body and the second pipe body, such as Figure 8 As shown, that is, the outer end of the expanded portion of the first tube body is circumferentially welded to fix the first and second tube bodies. At the same time, the circumferential weld seam 19 forms a sealing structure between the first tube body and the second tube body.

[0060] When using, Fig. 9 As shown, a joint 20 is welded at a suitable position of the first pipe body, and the conical surface of the joint is fixed to the compressor and other equipment by resistance welding, and then it can be used, and welding is convenient. Through the shrinking and expanding structures between the pipe bodies, the purpose of expanding or reducing the diameter can be conveniently achieved. Through multiple shrinking or expanding of the pipeline body, the installation and use requirements can be met. In addition, the transition support unit can be used to effectively change the flow rate to meet the use requirements, while minimizing the negative impact of the pipeline layout.

[0061] The invention has an ingenious structural design. Through simple assembly and production, a corresponding connection structure can be obtained, which can be applied to the transition connection between pipes when the pipeline is extended. It can adapt to the actual working condition configuration, and the refrigeration pipeline does not need to be prefabricated. Therefore, it has a high degree of matching with the needs of on-site use and can save pipe materials to a certain extent.

[0062] The transition support unit not only improves the strength of the connection structure, but also increases the flow rate (flow velocity) of the liquid / gas refrigerant transported in the pipeline. In the pipeline using this connection structure, even if the pipeline is long and has many bends, the flow rate loss is very small, which maximizes the cooling effect and reduces the energy consumption of the refrigeration equipment to achieve the same cooling effect compared to existing technology products.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe connection structure for refrigeration equipment, characterized in that: It comprises a first tube body, a second tube body connected to the first tube body, and a transition support unit between the two; the first tube body is provided with a flared portion at the tail end; the second tube body is provided with a constricted portion corresponding to the flared portion; The transition support unit is cylindrical, and one end of the transition support unit located inside the second tube body is a closed structure; the main structure of the transition support unit is arranged in the second tube body necking portion, and the flared eaves structure of the transition support unit is folded outward and wrapped around the end of the second tube body necking portion, forming a sealing ring structure on the outer wall of the necking portion, and at the same time, a plurality of hollow holes are provided on the flared eaves structure; The transition support unit is provided with an outward annular protrusion structure, and the cross section of the annular protrusion structure is in an arc shape, so that the second tube body forms an outlet structure that gradually narrows first and then gradually widens; The total area of ​​each of the hollow holes is larger than the area of ​​the closed solid part on the expanded eaves; A rectifying adjustment member is installed in the hollow hole; The rectifying adjustment piece is a rolled piece that is punched inward when making the hollow hole; The directions in which the rolls are bent toward the inside of the rectifying adjustment member are different; The closed end of the transition support unit is in an outwardly protruding arc surface structure.

2. A pipe connection structure for refrigeration equipment according to claim 1, characterized in that: An inwardly facing second tube body concave structure is provided on the necked portion of the second tube body at a position corresponding to the convex structure of the transition support unit.

3. The pipe connection structure for refrigeration equipment according to claim 1, characterized in that: An inwardly facing first tube body recessed structure is provided on the expanded portion of the first tube body at a position corresponding to the raised structure of the transition support unit.

4. A method for assembling and manufacturing the pipe connection structure for refrigeration equipment according to claim 1, characterized in that: The steps include: The cylinder is expanded to form an expanded eaves structure at its opening, and an annular convex structure is processed on the inner side of the expanded eaves of the cylinder to form a transition support unit; Punching the expanded eaves to form a number of hollow holes, and forming a rolled sheet with the solid structure of the punched hollow holes; Insert the closed end of the transition support unit into the necked portion of the second tube body, and turn the flared eaves structure outward to wrap around the outer wall of the second tube body to form a sealing ring structure; Insert one end of the transition support unit into the expanded portion of the first tube body, so that the inner wall of the transition section of the expanded portion of the first tube body squeezes the sealing ring structure to achieve a tight fit; The portion of the annular protruding structure on the outer wall of the expanded portion of the first tube body corresponding to the transition support unit is pressed into a concave structure.

5. The assembly method according to claim 4, characterized in that: The first tube body is clamped 2-3 times by using a clamp to form 4 or 6 recessed areas, and the recessed areas are evenly distributed.

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