Heat exchanger pipe fitting clamping device

Abstract

The utility model discloses a heat exchanger pipe fitting clamping device which comprises an expansion pipe capable of being provided with a plurality of heat exchanger units to be welded in a penetrating mode, a mandrel capable of moving in the axial direction is arranged in the expansion pipe, and a movable limiting assembly is correspondingly arranged at the position of each heat exchanger unit on the expansion pipe. The limiting assembly partially inwards penetrates through the pipe wall of the expansion pipe, and a plurality of conical parts matched with the limiting assembly are arranged on the mandrel and used for enabling the conical parts to gradually extrude and push the limiting assembly to move towards the outside of the pipe wall so as to abut against the inner wall of the heat exchanger unit when the mandrel moves. The device has the advantages of simple structure, good welding quality, high welding efficiency, wide adaptability and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fixture, specifically relates to a heat exchanger pipe fitting clamping device. BACKGROUND

[0002] With the increase of industrial demand and the progress of technology, the heat exchanger industry has developed various types of pipe fitting clamps for clamping various heat exchangers for butt joint, welding and other processes. The current heat exchanger clamp binds the heat exchanger by clamping the outer surface of the heat exchanger. The heat exchanger clamp currently used on the market has the following disadvantages:

[0003] 1. When the heat exchanger clamp clamps the outer surface of the heat exchanger pipe fitting, it will interfere with the butt joint welding of the heat exchanger unit, greatly reducing the welding efficiency.

[0004] 2. The heat exchanger clamp clamps the outer surface of the heat exchanger pipe fitting, and the alignment accuracy is not high. When the clamping force is too large, it is easy to damage the heat exchanger body.

[0005] 3. The heat exchanger clamp has poor adaptability. The same clamping cannot be used for heat exchangers with different pipe diameters, resulting in increased production cost and low work efficiency. INVENTION CONTENTS

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a heat exchanger pipe fitting clamping device with simple structure, good welding quality, high welding efficiency and wide adaptability.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A heat exchanger pipe fitting clamping device, comprising an expander pipe through which a plurality of heat exchanger units to be welded can pass, wherein the expander pipe is provided with a mandrel movable in the axial direction, and a movable limiting component is arranged at the position of each heat exchanger unit on the expander pipe, the limiting component partially penetrates the pipe wall of the expander pipe inwardly, and the mandrel is provided with a plurality of tapered portions matched with the limiting components and used for gradually extruding and pushing the limiting components to move outwardly to abut against the inner wall of the heat exchanger unit when the mandrel moves.

[0009] As a further improvement of the above technical scheme:

[0010] Each limiting component comprises a plurality of sliders arranged at intervals in the circumferential direction of the expander pipe, the sliders are movably arranged in the pipe wall of the expander pipe, and the tapered portion and the bottom of the slider abut against each other when the mandrel drives the tapered portion to move, so as to gradually push the slider outwardly to abut against the inner wall of the heat exchanger unit.

[0011] The top of the slider is provided with a detachable expansion block for adapting to heat exchanger units with different pipe diameters.

[0012] The bottom surface of the sliding block is a slope surface for matching with the conical surface of the conical part.

[0013] Each of the limiting components comprises an elastic limiting member, and the plurality of sliding blocks are installed on the expansion pipe by the elastic limiting members and are used for resetting the sliding blocks under the elastic action when the mandrel is reset.

[0014] The elastic limiting member is a ring spring, and a limiting groove for embedding the ring spring is formed on each of the sliding blocks and is used for winding and limiting the plurality of sliding blocks on the expansion pipe.

[0015] A plurality of conical sleeves are sleeved on the mandrel to form a plurality of conical parts, and a spacer sleeve is sleeved between two adjacent conical sleeves.

[0016] The expansion pipe is provided with a stop block at one end and a detachable pressing sleeve at the other end, which is used for installing and pressing the plurality of heat exchanger units to realize axial positioning.

[0017] The end portion of the expansion pipe is provided with a bushing assembly, the bushing assembly comprises an inner bushing and an oil-free bushing which are sleeved and matched, the oil-free bushing is fixed at the port of the expansion pipe, and the inner bushing is penetrated on the mandrel.

[0018] The heat exchanger pipe clamping device is also provided with a driving member for driving the axial movement of the mandrel, and the driving member is connected with the mandrel which extends out of the expansion pipe through a joint.

[0019] Compared with the prior art, the heat exchanger pipe clamping device has the following advantages:

[0020] Firstly, the heat exchanger pipe clamping device disclosed by the utility model is provided with special matched expansion pipe, mandrel and limiting component, so that the plurality of heat exchanger units to be welded are subjected to the inward pressing force, radial limiting and fixing are realized, the welding robot is facilitated to perform the welding operation on the outer wall of the plurality of heat exchanger units, the interference of the clamp with butt welding is avoided, and the welding precision and welding work efficiency are greatly improved.

[0021] Secondly, the heat exchanger pipe clamping device disclosed by the utility model is provided with the mandrel which moves in the expansion pipe, and the conical part is arranged on the mandrel to push the limiting component to press against the heat exchanger unit from the inner wall, so that the pressing and limiting mode can effectively avoid excessive clamping force and greatly reduce the damage to the heat exchanger unit.

[0022] Thirdly, the heat exchanger pipe clamping device disclosed by the utility model is provided with the conical part to gradually push the limiting component to move and realize stepless adjustment, so that the heat exchanger pipe clamping device can be applied to heat exchanger units with various pipe diameters, has strong universality and wide adaptability.

[0023] The utility model discloses a heat exchanger pipe fitting clamping device, through the sliding block of setting apart in the expansion pipe circumferential interval, make can even to the heat exchanger unit inner wall provide the thrust to resist tightly, avoid only to single part exert force to cause the damage of heat exchanger unit.

[0024] Five, the utility model discloses a heat exchanger pipe fitting clamping device, through the top installation of sliding block has certain height's expansion block, make can be applicable to multiple different pipe diameter's heat exchanger unit, and the versatility is strong, and the adaptability is wide.

[0025] Six, the utility model discloses a heat exchanger pipe fitting clamping device, through the cooperation design of bevel and taper surface, make the movement of conical part push sliding block more smooth, fast, also greatly improved the stability of device.

[0026] Seven, the utility model discloses a heat exchanger pipe fitting clamping device, through setting elastic stop piece, on the one hand, when the mandrel moves to initial position, the elastic force of elastic stop piece drives sliding block to move to mandrel, restores to initial position, removes the radial location of heat exchanger unit. On the other hand, the elastic stop piece installs the sliding block in the expansion pipe and avoids the sliding block from falling.

[0027] Eight, the utility model discloses a heat exchanger pipe fitting clamping device, through setting a ring annular spring is embedded in the limiting groove of sliding block and is located on the expansion pipe around multiple sliding blocks, make the synchronous movement of multiple sliding blocks of limiting component, improve the reliability of device, and installation maintenance are also more convenient.

[0028] Nine, the utility model discloses a heat exchanger pipe fitting clamping device, through setting the taper sleeve is set on the mandrel and forms the conical part, and the processing of mandrel is convenient, and also convenient device later overhaul replacement. Through setting the spacer sleeve corresponds the taper sleeve with limiting component, make single limiting component correspondingly abut single heat exchanger unit, to adapt the width of heat exchanger unit.

[0029] Ten, the utility model discloses a heat exchanger pipe fitting clamping device, through setting the block at one end of expansion pipe, and the other end's top tight sleeve cooperates and tight multiple heat exchanger units to be welded, carries out the axial positioning of heat exchanger unit, avoids the axial movement of heat exchanger unit and influences the welding quality. SHEET DESCRIPTION

[0030] Figure 1 It is the three -dimensional principle schematic view of the utility model discloses a heat exchanger pipe fitting clamping device.

[0031] Figure 2 It is the structure principle schematic view of the utility model discloses a heat exchanger pipe fitting clamping device.

[0032] Figure 3 It is Figure 2 A-A structure section schematic view.

[0033] Figure 4 For Figure 3 The enlarged structure schematic view at B of the figure.

[0034] Figure 5 For the structure principle schematic view of the heat exchanger pipe fitting clamping device and the heat exchanger unit.

[0035] Figure 6 For Figure 5 The structure section schematic view at C-C of the figure.

[0036] The various reference signs in the drawings represent: 1, heat exchanger unit; 2, expansion pipe; 21, stop block; 22, jacking sleeve; 3, mandrel; 31, conical portion; 32, joint; 33, spacer sleeve; 4, limiting assembly; 41, sliding block; 42, expansion block; 43, elastic limiting piece; 5, bushing assembly; 51, inner bushing; 52, oil-free bushing; 6, driving piece. DETAILED DESCRIPTION

[0037] The utility model will be described further in detail below in combination with the drawings and specific embodiments.

[0038] In the description of the utility model, it is understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In addition, 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 of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0040] In the utility model, unless otherwise specifically defined and limited, the terms "assembly", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] As Figures 1 to 6 The heat exchanger pipe clamping device of the embodiment is shown in the figure, which comprises an expandable pipe 2 through which a plurality of heat exchanger units 1 to be welded are arranged, and a mandrel 3 arranged in the expandable pipe 2 and movable in the axial direction. A movable limiting component 4 is arranged at the position of each heat exchanger unit 1 on the expandable pipe 2. The limiting component 4 partially penetrates the pipe wall of the expandable pipe 2, that is, a plurality of through hole portions are formed on the expandable pipe 2, and each limiting component 4 is arranged at each through hole portion. One end of the limiting component 4 extends into the expandable pipe 2 and is used in cooperation with the tapered portion 31, and the other end extends out of the expandable pipe 2 and is used to abut against the heat exchanger unit 1. The mandrel 3 is provided with a plurality of tapered portions 31 which cooperate with the limiting component 4, and when the mandrel 3 moves, the tapered portions 31 gradually extrude and push the limiting component 4 to move outwardly of the pipe wall to abut against the inner wall of the heat exchanger unit 1.

[0042] The specific implementation principle is as follows:

[0043] The heat exchanger pipe clamping device is used as follows. First, a plurality of heat exchanger units 1 to be welded are arranged on the outer wall of the expandable pipe 2. Then, the mandrel 3 in the expandable pipe 2 is pulled to move in the axial direction. Since each movable limiting component 4 partially penetrates the pipe wall of the expandable pipe 2, the tapered portion 31 on the moving mandrel 3 will inevitably gradually extrude and push the limiting component 4 to move outwardly of the pipe wall. Finally, each limiting component 4 abuts against the corresponding heat exchanger unit 1. That is, the plurality of heat exchanger units 1 to be welded are subjected to an abutting force from the inside to the outside, and are radially limited and fixed, which facilitates the welding robot to perform welding work on the outer wall of the plurality of heat exchanger units 1, avoids interference of the clamp with butt welding, and greatly improves the welding precision and welding work efficiency. At the same time, by arranging the mandrel 3 to move in the axial direction in the expandable pipe 2, the tapered portion 31 on the mandrel 3 gradually pushes the limiting component 4 to move outwardly to abut against the inner wall of the heat exchanger unit 1. The driving mode is simple and reliable, and only the mandrel 3 needs to be moved to realize radial limitation of the heat exchanger unit 1. By arranging the tapered portion 31 to gradually push the limiting component 4 to move to realize stepless adjustment, the heat exchanger pipe clamping device can be applied to heat exchanger units 1 of various sizes, and has strong universality.

[0044] Through the above special scientific design, the heat exchanger pipe clamping device has the following advantages:

[0045] Firstly, the heat exchanger pipe clamping device of the embodiment completely overturns the design of clamping the outer part of the heat exchanger from the outside in the prior art, but through the arrangement of the specially matched expandable pipe 2, mandrel 3 and limiting component 4, the plurality of heat exchanger units 1 to be welded are subjected to an abutting force from the inside to the outside, and are radially limited and fixed, which facilitates the welding robot to perform welding work on the outer wall of the plurality of heat exchanger units 1, avoids interference of the clamp with butt welding, and greatly improves the welding precision and welding work efficiency.

[0046] Second, the heat exchanger pipe fitting clamping device of the utility model, through the core shaft 3 that sets up in the expansion pipe 2 moves, and sets up the conical part 31 on the core shaft 3 and pushes the limiting component 4 from the inner wall and is close to the heat exchanger unit 1, and this close limiting mode can effectively avoid that the clamping strength is too big, greatly reduces the damage caused to the heat exchanger unit 1.

[0047] Third, the heat exchanger pipe fitting clamping device of the utility model, through setting conical part 31 gradually pushes the limiting component 4 and moves to realize stepless regulation, so that the heat exchanger pipe fitting clamping device can be applicable to a variety of different pipe diameter heat exchanger unit 1, and the versatility is strong, and the adaptability is wide.

[0048] As shown in Figures 1 to 6 , in the embodiment, each limiting component 4 includes a plurality of sliders 41 spaced apart circumferentially along the expansion pipe 2, the slider 41 is movably provided on the wall of the expansion pipe 2, when the conical part 31 and the bottom of the slider 41 abut when the core shaft 3 moves, the slider 41 is gradually pushed out to abut against the inner wall of the heat exchanger unit 1. Preferably, the sliders 41 are uniformly spaced circumferentially along the expansion pipe 2, so that uniform pushing force can be provided to the inner wall of the heat exchanger unit 1 to abut against it, avoiding damage to the heat exchanger unit 1 by applying force only to a single part.

[0049] As shown in Figures 1 to 6 , in the embodiment, the top of the slider 41 is provided with a detachable expansion block 42 for accommodating heat exchanger units 1 of different pipe diameters. For example, when the pipe diameter of the next batch of heat exchanger units 1 is larger, an expansion block 42 with a certain height can be installed on the top of the slider 41, and the inner wall of the heat exchanger unit 1 with a larger pipe diameter can also be abutted against. This makes the heat exchanger pipe fitting clamping device of the utility model applicable to a variety of heat exchanger units 1 of different pipe diameters, with strong versatility and wide adaptability.

[0050] As shown in Figure 3 and Figure 4 , in the embodiment, the bottom surface of the slider 41 is inclined, used to cooperate with the tapered surface of the conical part 31. The cooperation of the inclined surface and the tapered surface makes the movement of the slider 41 pushed by the conical part 31 smoother and faster, and also greatly improves the stability of the device.

[0051] As shown in Figures 1 to 6As shown, in the embodiment, each limiting assembly 4 comprises an elastic limiting piece 43 (for example, a spring, a spring piece, etc.), and the plurality of sliding blocks 41 are limitedly installed on the expansion pipe 2 by the elastic limiting piece 43 and are used to reset the sliding blocks 41 under the elastic action when the mandrel 3 is reset. By arranging the elastic limiting piece 43, on the one hand, when the mandrel 3 moves to the initial position, the elastic force of the elastic limiting piece 43 drives the sliding blocks 41 to move towards the mandrel 3, and the initial position is restored, and the radial limiting of the heat exchanger unit 1 is released. On the other hand, the elastic limiting piece 43 limits the installation of the sliding blocks 41 on the expansion pipe 2, and the sliding blocks 41 are prevented from falling off.

[0052] As shown in the drawings, Figures 1 to 6 In the embodiment, the elastic limiting piece 43 is a ring spring, and a limiting groove for embedding the ring spring is arranged on each sliding block 41, and the plurality of sliding blocks 41 are arranged and limited on the expansion pipe 2. By arranging the ring spring to be embedded in the limiting groove of the sliding block 41, the plurality of sliding blocks 41 are arranged and limited on the expansion pipe 2, so that the plurality of sliding blocks 41 of the limiting assembly 4 move synchronously, the reliability of the device is improved, and the installation and maintenance are more convenient.

[0053] As shown in the drawings, Figures 3 to 6 In the embodiment, a plurality of taper sleeves are arranged on the mandrel 3 to form a plurality of taper portions 31, and a spacer 33 is arranged between adjacent two taper sleeves. By arranging the taper sleeves on the mandrel 3 to form the taper portions 31, the machining of the mandrel 3 is facilitated, and the later maintenance and replacement of the device are also facilitated. By arranging the spacer 33, the taper sleeves and the limiting assembly 4 are arranged correspondingly, so that a single limiting assembly 4 corresponds to and abuts against a single heat exchanger unit 1, so as to adapt to the width of the heat exchanger unit 1. It should be particularly noted that in other embodiments, the taper portion 31 can also be a taper sleeve which is integrally formed with the mandrel 3, a taper block which is fixed on the mandrel 3 by means of adhesion or welding, etc., and various simple transformations of the taper portion 31 shall belong to the protection scope of the utility model.

[0054] As shown in the drawings, Figures 1 to 6 In the embodiment, the expansion pipe 2 is provided with a stop block 21 at one end and a detachable tightening sleeve 22 at the other end, which is used to install and tighten the plurality of heat exchanger units 1 to achieve axial positioning. By arranging the stop block 21 at one end of the expansion pipe 2 and cooperating with the tightening sleeve 22 at the other end to tighten the plurality of heat exchanger units 1 to be welded, the axial positioning of the heat exchanger unit 1 is achieved, and the axial movement of the heat exchanger unit 1 is prevented from affecting the welding quality.

[0055] As shown in the drawings, Figure 6As shown in the embodiment, the end of the expanded tube 2 is provided with a bushing assembly 5, which includes an inner bushing 51 and an oil-free bushing 52, the oil-free bushing 52 is fixed at the port of the expanded tube 2, and the inner bushing 51 is arranged on the mandrel 3. By arranging the bushing assembly 5 between the expanded tube 2 and the mandrel 3, the friction between the expanded tube 2 and the mandrel 3 is reduced, and the service life of the device is prolonged.

[0056] As Figures 1 to 6 As shown in the embodiment, the heat exchanger tube fitting clamping device is further provided with a driving member 6 (such as a motor, a pneumatic cylinder, etc.) for driving the axial movement of the mandrel 3, and the driving member 6 is connected with the mandrel 3 through the joint 32 and extends out of the expanded tube 2. By arranging the moving driving member 6 to drive the axial movement of the mandrel 3, the automation degree of the device is improved, and the labor cost is reduced.

[0057] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application by using the disclosed technical content, or modify it into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not deviate from the content of the technical scheme of the present application, shall fall within the scope of protection of the technical scheme of the present application.

Claims

1. A heat exchanger tube clamping device, characterized in that: The application relates to a tube expander (2) which can be used to arrange a plurality of heat exchanger units (1) to be welded, wherein the tube expander (2) is provided with a mandrel (3) which can move axially, and wherein a movable limiting component (4) is arranged at the position of each heat exchanger unit (1) on the tube expander (2), the limiting component (4) locally penetrating the tube wall of the tube expander (2) inwardly, and wherein the mandrel (3) is provided with a plurality of conical portions (31) which cooperate with the limiting component (4) and are used to gradually press and push the limiting component (4) outwardly against the inner wall of the heat exchanger unit (1) when the mandrel (3) moves.

2. The heat exchanger tube gripping device of claim 1, wherein: Each limiting component (4) comprises a plurality of sliders (41) which are arranged at intervals in the circumferential direction of the tube expander (2) and are movably arranged on the tube wall of the tube expander (2), and the bottom of the slider (41) is in abutment with the conical portion (31) when the mandrel (3) moves, so as to gradually push the slider (41) outwardly to abut against the inner wall of the heat exchanger unit (1).

3. The heat exchanger tube gripping device of claim 2, wherein: The top of the slider (41) is provided with a detachable expansion block (42) which is used to adapt to heat exchanger units (1) with different diameters.

4. The heat exchanger tube gripping device of claim 2, wherein: The bottom surface of the slider (41) is a bevel which is used to cooperate with the taper of the conical portion (31).

5. The heat exchanger tube gripping device of claim 2, wherein: Each limiting component (4) comprises an elastic limiting member (43), and the plurality of sliders (41) are limitedly arranged on the tube expander (2) by the elastic limiting member (43) and are used to reset the slider (41) under the action of the elastic limiting member (43) when the mandrel (3) is reset.

6. The heat exchanger tube gripping device of claim 5, wherein: The elastic limiting member (43) is a ring spring, and a limiting groove is arranged on each slider (41) to embed the ring spring, so as to arrange the plurality of sliders (41) around the tube expander (2).

7. The heat exchanger tube gripping device of any one of claims 1 to 6, wherein: A plurality of conical sleeves are arranged on the mandrel (3) to form the plurality of conical portions (31), and a spacer (33) is arranged between two adjacent conical sleeves.

8. The heat exchanger tube gripping device of any one of claims 1 to 6, wherein: One end of the tube expander (2) is provided with a stop block (21), and the other end is provided with a detachable tightening sleeve (22) which is used to tightly arrange the plurality of heat exchanger units (1) after installation to realize axial positioning.

9. The heat exchanger tube gripping device of any one of claims 1 to 6, wherein: The end of the tube expander (2) is provided with a bushing assembly (5), the bushing assembly (5) comprises an inner bushing (51) and an oil-free bushing (52) which are arranged in cooperation, the oil-free bushing (52) is fixed at the port of the tube expander (2), and the inner bushing (51) is arranged on the mandrel (3).

10. The heat exchanger tube tooling apparatus of any one of claims 1 to 6, wherein: A driving member (6) is further arranged to drive the mandrel (3) to move axially, and the driving member (6) is connected to the mandrel (3) which extends outwardly from the tube expander (2) through a joint (32).

Images