Horizontal pipe expanding equipment

Abstract

The invention discloses horizontal pipe expanding equipment which comprises an expanding rod loading mechanism used for arranging an expanding rod bundle; the core set clamping mechanism is used for clamping a heat exchanger core set, and the core set clamping mechanism and the expansion rod loading mechanism are arranged correspondingly; the expansion rod driving mechanism is used for driving the expansion rod cluster to move in the direction close to or away from the heat exchanger core set. The parallel pushing and expanding mode avoids inclination of the cooling pipe, the parallelism and perpendicularity of the core assembly are guaranteed, the pipe expanding quality is effectively improved, and the qualified rate of products is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchanger preparation, in particular to a horizontal tube expansion device. Background Art

[0002] Heat exchangers are indispensable equipment in industrial production. The manufacturing quality of their core components, the heat exchanger core group, directly affects the performance and efficiency of the heat exchanger.

[0003] The tube expansion process is a key step in the manufacture of heat exchanger core groups. Its purpose is to connect the cooling tubes to the tube sheets, form a reliable sealing structure, and ensure good heat transfer between the cooling tubes and the tube sheets.

[0004] However, the traditional pipe expansion process mainly relies on manual operation, which has the following problems: Low efficiency: Traditional equipment can only expand a few cooling tubes at a time, and cannot be returned for expansion. It requires frequent disassembly and assembly of the expansion head, which is cumbersome and inefficient.

[0005] Unstable quality: During the expansion process, the cooling tube is prone to tilt, affecting the parallelism and verticality of the core group, resulting in unstable expansion quality.

[0006] Complex operation: Traditional equipment requires collaborative operation by multiple people, and the operation steps are cumbersome, requiring high skills of the operator.

[0007] Limited scope of application: Traditional equipment is usually only applicable to the expansion of heat exchanger core groups of specific models, and it is difficult to adapt to the needs of different products.

[0008] The existence of these problems restricts the production efficiency and quality of the heat exchanger core group, and cannot meet the demand of modern industrial production for efficient and high-quality heat exchanger products. Summary of the invention

[0009] The purpose of the present invention is to provide a horizontal pipe expanding device to solve the problems raised in the above background technology.

[0010] To achieve the above object, the present invention provides the following solutions: A horizontal pipe expansion device, comprising: A spreader rod loading mechanism for laying out the spreader rod cluster; A core assembly clamping mechanism, used for clamping the core assembly of the heat exchanger, wherein the core assembly clamping mechanism and the expansion rod loading mechanism are arranged correspondingly to each other; The expansion rod driving mechanism is used to drive the expansion rod cluster to move toward or away from the heat exchanger core group.

[0011] Furthermore, the expansion rod loading mechanism comprises a frame, an expansion rod positioning plate is vertically arranged at one end of the frame close to the core assembly clamping mechanism, and an expansion rod fixing plate is vertically arranged at one end of the frame away from the core assembly clamping mechanism; Guide pillars are correspondingly arranged at the upper and lower ends of the frame; One end of the guide column horizontally penetrates the expansion rod positioning plate and is fixedly connected thereto, and the other end of the guide column horizontally penetrates the expansion rod fixing plate and is slidably matched thereto; One end of the expansion rod cluster is fixed on the expansion rod fixing plate, a positioning hole group adapted to the expansion rod cluster is opened on the plate body of the expansion rod positioning plate, and the other end of the expansion rod cluster passes through the positioning hole group.

[0012] Furthermore, a plurality of groups of expansion rod movable plates are arranged between the expansion rod positioning plate and the expansion rod fixing plate; The plate body of the expansion rod movable plate is provided with an activity hole group adapted to the expansion rod cluster; The expansion rod cluster passes through the movable hole group in sequence; The expansion rod positioning plate, the plurality of expansion rod movable plates and the expansion rod fixing plate are all provided with connecting chains on the plates adjacent to each other.

[0013] Further, the expansion rod driving mechanism includes a hydraulic oil station and a hydraulic oil cylinder, the hydraulic oil cylinder is installed on the frame and the output end is connected to the expansion rod fixing plate; The hydraulic oil station is connected to the hydraulic cylinder.

[0014] Furthermore, the core assembly clamping mechanism comprises a workbench, on which a limiting vertical plate is slidably arranged, and the heat exchanger core assembly is clamped on the limiting vertical plate; The limiting vertical plate is connected to a pushing assembly, and the pushing assembly is used to push the limiting vertical plate to move toward or away from the expansion rod loading mechanism; A lifting assembly is installed at the bottom end of the workbench, and the lifting assembly is used to drive the workbench to perform vertical reciprocating movement in a direction perpendicular to the axis of the heat exchanger core group; A translation assembly is also installed at the bottom end of the workbench, and the translation assembly is used to drive the workbench to perform horizontal reciprocating movement along a direction perpendicular to the axis of the heat exchanger core group.

[0015] Furthermore, the pushing assembly includes a screw seat and a screw connected to the screw seat; The screw seat is installed on the workbench and corresponds to the position of the limit plate, and the movable end of the screw is rotatably connected to the limit plate.

[0016] Furthermore, a mobile platform is arranged correspondingly at the bottom of the workbench, and the lifting assembly is installed at the bottom of the mobile platform; The translation assembly includes a sliding assembly and a servo motor; The sliding assembly and the servo motor are horizontally arranged between the mobile platform and the workbench in a direction perpendicular to the axis of the heat exchanger core group; The sliding assembly includes a sliding block and a sliding rail that are slidably matched; The slide block and the slide rail are connected to the workbench and the mobile platform respectively; The servo motor drives the slide rail to move back and forth along the slide rail.

[0017] It can be seen from the above technical solution that, compared with the prior art, the beneficial effects of the present invention are: 1. The parallel push expansion method of the present invention avoids the tilting of the cooling tube, ensures the parallelism and verticality of the core group, effectively improves the quality of tube expansion, and increases the qualified rate of products.

[0018] 2. The present invention has reasonable design, stable and reliable operation, reduces the maintenance cost of the equipment, and increases the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a front view of the horizontal pipe expanding device in the embodiment of the present invention; Figure 2 It is a side view of a horizontal pipe expanding device in an embodiment of the present invention; Figure 3 It is a top view of the horizontal pipe expanding device in an embodiment of the present invention.

[0021] Description of reference numerals: 1. Frame; 2. Spreader rod positioning plate; 3. Spreader rod fixing plate; 4. Guide column; 5. Spreader rod movable plate; 6. Connecting chain; 7. Hydraulic cylinder; 8. Workbench; 9. Limiting plate; 10. Screw seat; 11. Screw; 12. Moving platform; 13. Lifting assembly; 14. Servo motor; 15. Sliding assembly; 16. Spreader rod cluster; 17. Hydraulic oil station. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 this application can be understood according to specific circumstances.

[0026] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] Example Please refer to the attached Figure 1-3 , a horizontal pipe expansion device provided in this embodiment includes: An expansion rod loading mechanism for horizontally arranging the expansion rod cluster 16; The core assembly clamping mechanism is used to horizontally clamp the heat exchanger core assembly. The core assembly clamping mechanism and the expansion rod loading mechanism are arranged correspondingly to each other (the expansion rod cluster 16 and the heat exchanger core assembly must also correspond); The expansion rod driving mechanism is used to drive the expansion rod cluster 16 to move toward or away from the heat exchanger core group, so that the expansion rod cluster 16 expands the heat exchanger core group.

[0028] It should be noted that the expansion rod cluster 16 is a plurality of expansion rods arranged in an array, with an expansion head and an expansion tail at both ends, and the expansion head is used to expand the heat exchanger core group.

[0029] Specifically, the expansion rod loading mechanism comprises a frame 1, on which an expansion rod positioning plate 2 is vertically arranged at one end of the frame 1 close to the core assembly clamping mechanism, and an expansion rod fixing plate 3 is vertically arranged at one end of the frame 1 away from the core assembly clamping mechanism; Guide pillars 4 are correspondingly arranged at the upper and lower ends of the frame 1; One end of the guide post 4 horizontally penetrates the expansion rod positioning plate 2 and is fixedly connected thereto, and the other end of the guide post 4 horizontally penetrates the expansion rod fixing plate 3 and is slidably matched therewith; One end of the expansion rod cluster 16 is fixed on the expansion rod fixing plate 3 , and a positioning hole group adapted to the expansion rod cluster 16 is opened on the plate body of the expansion rod positioning plate 3 , and the other end of the expansion rod cluster 16 passes through the positioning hole group.

[0030] It should be noted that the expansion rod fixing plate 3 is provided with expansion rod loading and unloading screw holes for fixing and disassembling the expansion rod. The expansion rod positioning plate 3 plays the role of positioning the expansion rod. The expansion rod is customized with high-strength stainless steel rod. One end has a fixed external thread to fix the expansion rod on the expansion rod fixing plate 3, and the other end has an internal screw hole to install the expansion head.

[0031] Specifically, the positioning hole group is a plurality of holes that are arranged in an array on the plate body of the expansion rod positioning plate 2 and are adapted to the expansion rod, so as to ensure that the expansion rod can move in the holes.

[0032] The guide column 4 can ensure the guided movement of the expansion rod fixing plate 3 .

[0033] In addition, a plurality of groups of expansion rod movable plates 5 are arranged between the expansion rod positioning plate 2 and the expansion rod fixing plate 3; The plate body of the expansion rod movable plate 5 is provided with an active hole group adapted to the expansion rod cluster 16; The expansion rod cluster 16 passes through the movable hole group in sequence; Connecting chains 6 are provided on the plates adjacent to each other between the expansion rod positioning plate 2, the plurality of expansion rod movable plates 5 and the expansion rod fixing plate 3.

[0034] Specifically, the movable hole group is a plurality of holes that are arranged in an array on the plate body of the expansion rod movable plate 5 and are adapted to the expansion rod, so as to ensure that the expansion rod can move in the holes.

[0035] The expansion rod movable plate 5 can move under the drive of the expansion rod fixed plate 3, and can move in sequence, which can protect the expansion rod from bending due to thrust and increase the strength.

[0036] The connecting chain 6 is arranged to ensure that when the expansion rod fixed plate 3 moves back, the expansion rod movable plate 5 is driven to move back in sequence, and ensure that the distance between every two adjacent plates can be fixed.

[0037] Specifically, the expansion rod driving mechanism includes a hydraulic oil station 17 and a hydraulic oil cylinder 7, the hydraulic oil cylinder 7 is installed on the frame 1 and the output end is connected to the expansion rod fixing plate 3; The hydraulic oil station 17 is connected to the hydraulic cylinder 7 .

[0038] In this embodiment, two hydraulic cylinders 7 are selected and connected to the upper and lower sides of the expansion rod fixing plate 3 respectively, which can ensure sufficient thrust and, more importantly, ensure stable central force.

[0039] The hydraulic cylinder 7 pushes the expansion rod fixing plate 3 to make the expansion rod cluster 16 move forward and backward to achieve the purpose of pipe expansion. The expansion rod movement can determine the expansion rod telescopic length according to the length of the product, and is adjusted and controlled by a travel switch. After the pipe expansion is completed, the travel switch reacts to automatically control the hydraulic cylinder 7 to drive it to return to its original position immediately.

[0040] It should be noted that the hydraulic oil station 17 is composed of an electric motor, a plunger oil pump, a relief valve, a reversing valve, and an oil barrel, which provides a power source for the hydraulic cylinder 7 and has an adjustment device that can output the expansion force steadily. The expansion thrust can be adjusted for different pipes to avoid overload and damage to the equipment.

[0041] Specifically, this equipment can expand the pipe into any one of the four models: S95, S99, S120A, and S120B.

[0042] Specifically, the core assembly clamping mechanism includes a workbench 8, on which a limiting vertical plate 9 is slidably arranged, and the heat exchanger core assembly is clamped on the limiting vertical plate 9; The limiting upright plate 9 is connected with a pushing assembly, and the pushing assembly is used to push the limiting upright plate 9 to move toward or away from the expansion rod loading mechanism; A lifting assembly is installed at the bottom end of the workbench 8, and the lifting assembly is used to drive the workbench 8 to move vertically back and forth in a direction perpendicular to the axis of the heat exchanger core group; A translation assembly is also installed at the bottom end of the workbench 8, and the translation assembly is used to drive the workbench 8 to perform horizontal reciprocating movement along a direction perpendicular to the axis of the heat exchanger core group.

[0043] The pushing assembly includes a screw seat 10 and a screw 11 that is matched and connected with the screw seat 10; The screw seat 10 is installed on the workbench 8 and corresponds to the position of the limit plate 9. The moving end of the screw 11 is rotatably connected to the limit plate 9.

[0044] A mobile platform 12 is arranged correspondingly at the bottom of the workbench 8, and a lifting assembly is installed at the bottom of the mobile platform 12; The translation assembly includes a sliding assembly 15 and a servo motor 14; A sliding assembly 15 and a servo motor 14 are horizontally arranged between the mobile platform 12 and the workbench 8 in a direction perpendicular to the axis of the heat exchanger core group; The sliding assembly 15 includes a sliding block and a sliding rail that are slidably matched; The slider and the slide rail are connected to the workbench 8 and the mobile platform 12 respectively; The servo motor 14 drives the slide rail to move back and forth along the slide rail.

[0045] It should be noted that the workbench 8 is 3 meters long and 1 meter wide, and has multiple M16 threaded holes on the table top, which can clamp products of different models and specifications.

[0046] Specifically, the specific structure of the lifting assembly can be simply arranged according to actual conditions, which is not difficult to understand for those skilled in the art. Alternatively, the workbench can be guided up and down by four T-shaped guide rails and driven by four screw lifts to perform motorized lifting up and down. Due to the different pipe expansion materials, such as the expansion of stainless steel pipes, which has a larger thrust, the four T-shaped guide rails effectively ensure the stability of the pipe expansion platform, and there are travel limit controls on the upper and lower parts of the workbench to avoid mechanical failures caused by improper operation.

[0047] Specifically, two groups of translation components can be arranged, namely two groups of sliding components 15, which are driven by two servo motors 14 to move horizontally in a direction perpendicular to the axis of the heat exchanger core group, which can also be called left and right movement. The lateral left and right movement range is 0.4 meters, the speed can be adjusted, and various cooling pipe hole spacing sizes can be set by CNC. There are travel switch limits on the left and right to ensure safe left and right operation.

[0048] It should be noted that the limit plate 9 moves forward and backward according to the length of the product under the drive of the pushing component. The limit plate 9 can prevent the expansion thrust from being too large and the clamping force from being insufficient, stabilize the product and prevent it from moving, and ensure the verticality and diagonal of the product.

[0049] In addition, an electrical control system is also provided in this embodiment, which is composed of an electrical control box and an equipment operation electrical control panel. The electrical control box is equipped with power control software, air switches, contactors, frequency converters, and CNC integrated program blocks; the operation (electrical) control panel is equipped with a manual button station and a CNC display screen, wherein the CNC display screen can CNCally set the cooling pipe hole spacing size, and the manual button station has 10 button switches, and the 10 button switches include hydraulic cylinder 7 start, stop, expansion rod forward, backward, manual, automatic, workbench rise, fall, workbench left, right, stop, power emergency stop, etc.

[0050] When the equipment moves horizontally, the electrical control system can be set to automatically complete the subsequent pipe alignment and expansion actions for each row, eliminating previous manual operations and greatly improving efficiency.

[0051] Specifically, this equipment uses hydraulic power as the drive source, which can output the expansion force steadily, greatly improving the quality of pipe expansion. It is also equipped with a pressure regulating device. By adjusting the hydraulic thrust, it can easily control whether the material of the expanded pipe is copper, aluminum, stainless steel, or nickel white copper, and can avoid damage to equipment or workpieces due to excessive thrust caused by excessive strength of the expanded pipe material such as stainless steel.

[0052] This equipment can be used for multiple purposes, and can be used for pipe expansion of various products such as S95, S99, S120A, S120B, etc.

[0053] This equipment is convenient for visually observing the quality of the windward side of the core group during pipe expansion, and is convenient for measuring the diagonal of the core group, so as to better ensure parallelism and verticality.

[0054] To summarize this equipment as a whole, it has a reasonable design, is well made, easy to operate, has high pipe expansion efficiency and good quality. The expansion rod and cooling pipe of this equipment are pushed and expanded in parallel, while the original old winch expansion machine is pulled and expanded at an angle. The old machine can only expand 4 cooling pipes at a time and cannot be returned for expansion. The expansion head must be disassembled and installed, and two people must work together to operate. Compared with the old expansion machine, this equipment only needs one person to operate, which also saves human resources. The equipment is easy to clamp and does not require the expansion head to be disassembled. The cooling pipe is pushed and expanded once, and the expansion rod expansion head is returned and expanded once, and the pipe is expanded back and forth twice in total. The equipment has greatly improved the product quality. In terms of efficiency, the expansion rod cluster that can be loaded by this equipment can have more than 40 expansion rods, and more than 40 cooling pipes can be pushed and expanded at a time, which is more than 10 times that of the old expansion machine.

[0055] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A horizontal pipe expansion device, characterized in that: include: A spreader rod loading mechanism for laying out the spreader rod cluster; A core assembly clamping mechanism, used for clamping the core assembly of the heat exchanger, wherein the core assembly clamping mechanism and the expansion rod loading mechanism are arranged correspondingly to each other; The expansion rod driving mechanism is used to drive the expansion rod cluster to move toward or away from the heat exchanger core group.

2. A horizontal pipe expansion device according to claim 1, characterized in that: The expansion rod loading mechanism comprises a frame, an expansion rod positioning plate is vertically arranged at one end of the frame close to the core assembly clamping mechanism, and an expansion rod fixing plate is vertically arranged at one end of the frame away from the core assembly clamping mechanism; Guide pillars are correspondingly arranged at the upper and lower ends of the frame; One end of the guide column horizontally penetrates the expansion rod positioning plate and is fixedly connected thereto, and the other end of the guide column horizontally penetrates the expansion rod fixing plate and is slidably matched thereto; One end of the expansion rod cluster is fixed on the expansion rod fixing plate, a positioning hole group adapted to the expansion rod cluster is opened on the plate body of the expansion rod positioning plate, and the other end of the expansion rod cluster passes through the positioning hole group.

3. A horizontal pipe expansion device according to claim 2, characterized in that: A plurality of groups of expansion rod movable plates are arranged between the expansion rod positioning plate and the expansion rod fixing plate; The plate body of the expansion rod movable plate is provided with an activity hole group adapted to the expansion rod cluster; The expansion rod cluster passes through the movable hole group in sequence; The expansion rod positioning plate, the plurality of expansion rod movable plates and the expansion rod fixing plate are all provided with connecting chains on the plates adjacent to each other.

4. The horizontal pipe expansion equipment according to claim 1, characterized in that: The expansion rod driving mechanism comprises a hydraulic oil station and a hydraulic oil cylinder, wherein the hydraulic oil cylinder is mounted on the frame and the output end is connected to the expansion rod fixing plate; The hydraulic oil station is connected to the hydraulic cylinder.

5. The horizontal pipe expansion equipment according to claim 1, characterized in that: The core assembly clamping mechanism comprises a workbench, on which a limiting vertical plate is slidably arranged, and the heat exchanger core assembly is clamped on the limiting vertical plate; The limiting vertical plate is connected to a pushing assembly, and the pushing assembly is used to push the limiting vertical plate to move toward or away from the expansion rod loading mechanism; A lifting assembly is installed at the bottom end of the workbench, and the lifting assembly is used to drive the workbench to perform vertical reciprocating movement in a direction perpendicular to the axis of the heat exchanger core group; A translation assembly is also installed at the bottom end of the workbench, and the translation assembly is used to drive the workbench to perform horizontal reciprocating movement along a direction perpendicular to the axis of the heat exchanger core group.

6. The horizontal pipe expansion equipment according to claim 5, characterized in that: The pushing assembly includes a screw seat and a screw connected to the screw seat; The screw seat is installed on the workbench and corresponds to the position of the limit plate, and the movable end of the screw is rotatably connected to the limit plate.

7. The horizontal pipe expansion equipment according to claim 5, characterized in that: A mobile platform is arranged correspondingly at the bottom of the workbench, and the lifting assembly is installed at the bottom of the mobile platform; The translation assembly includes a sliding assembly and a servo motor; The sliding assembly and the servo motor are horizontally arranged between the mobile platform and the workbench in a direction perpendicular to the axis of the heat exchanger core group; The sliding assembly includes a sliding block and a sliding rail that are slidably matched; The slide block and the slide rail are connected to the workbench and the mobile platform respectively; The servo motor drives the slide rail to move back and forth along the slide rail.

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