U-shaped pipe positioning mechanism, U-shaped pipe fixing device and pipe expander

Abstract

The utility model discloses a U-shaped pipe positioning mechanism which comprises a bracket, a limiting frame and a limiting driving mechanism. The bracket is provided with a containing groove row, the containing groove row comprises a plurality of U-shaped containing grooves which are arranged in the left-right direction, and groove openings of the U-shaped containing grooves are formed forwards; a plurality of limiting strips are arranged on the limiting frame in the left-right direction, the limiting strips correspond to the U-portion containing grooves of the containing groove row one to one, the limiting strips and the rear ends of the U-portion containing grooves are arranged at intervals, the limiting frame is movably arranged on the bracket, the limiting frame can move to a locking position and a receding position, at the locking position, the limiting strips shield part of groove openings of the corresponding containing grooves, and at the receding position, the limiting strips shield part of groove openings of the corresponding containing grooves. At the abdicating position, the limiting strip abdicates the notch of the corresponding accommodating groove; the limiting driving mechanism is arranged between the bracket and the limiting frame and used for driving the limiting frame to move. The utility model further discloses a U pipe fixing device adopting the U pipe positioning mechanism and a pipe expander adopting the U pipe fixing device.

Description

Technical Field

[0001] The utility model relates to the field of heat exchanger production, in particular to a U-tube positioning mechanism, a U-tube fixing device and a tube expander. Background Art

[0002] The heat exchanger includes a fin group and a U-shaped tube inserted into the fin group. During the production process of the heat exchanger, tube expansion is required. Some existing tube expansion machines can automatically expand the heat exchanger, which include a tube expansion table, an expansion rod mechanism and a U-tube positioning mechanism. When the equipment is in use, the heat exchanger is placed flat on the tube expansion table, and the U-tube positioning mechanism and the expansion rod mechanism are placed on opposite sides of the tube expansion table. The U-tube positioning mechanism positions the U part of the U-tube, and then the expansion rod mechanism approaches the heat exchanger, and inserts the expansion rod into the straight tube part of the U-tube to expand the U-tube. Then the expansion rod mechanism moves away from the heat exchanger to pull out the expansion rod. During this period, the U-tube positioning mechanism positions the U part of the U-tube to prevent the U-tube from being pushed and pulled by the friction of the expansion rod, so that the U-tube moves relative to the fin group. However, the existing U-tube positioning mechanism has a relatively complex structure and a relatively high production cost. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a U-tube positioning mechanism, which can simplify the structure of the U-tube positioning mechanism and reduce the production cost.

[0004] The utility model also provides a U-tube fixing device having the U-tube positioning mechanism.

[0005] The utility model also provides a tube expander with the U-tube fixing device.

[0006] According to the U-tube positioning mechanism of the first embodiment of the utility model, it includes a bracket, a limit frame and a limit drive mechanism. The bracket is provided with a row of accommodating grooves, the row of accommodating grooves includes a plurality of U-portion accommodating grooves arranged in a left-right direction, and the notches of the U-portion accommodating grooves are arranged forward; the limit frame is provided with a plurality of limit strips arranged in a left-right direction, the limit strips correspond to the U-portion accommodating grooves of the row of accommodating grooves one by one, the limit strips are arranged at intervals with the rear ends of the U-portion accommodating grooves, the limit frame is movably arranged on the bracket, and the limit frame can move to a locking position and a yielding position, in the locking position, the limit strip blocks part of the notch of the corresponding accommodating groove, and in the yielding position, the limit strip yields the notch of the corresponding accommodating groove; the limit drive mechanism is arranged between the bracket and the limit frame and is used to drive the movement of the limit frame.

[0007] The U-tube positioning mechanism according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: the U-tube positioning mechanism moves close to the heat exchanger, and the U parts of the multiple U-shaped tubes of the heat exchanger enter the multiple U-part accommodating grooves of the bracket. At this time, the limit drive mechanism drives the limit frame to move from the yielding position to the locking position, and the limit bar blocks part of the notch of the U-part accommodating groove. At this time, the multiple limit bars and the rear ends of the multiple U-part accommodating grooves jointly limit the positions of the U parts of the multiple U-shaped tubes. The limit drive mechanism drives a limit frame to cooperate with the bracket to limit the U parts of the multiple U-shaped tubes, thereby simplifying the structure of the U-tube positioning mechanism and reducing the production and manufacturing cost of the U-tube positioning mechanism.

[0008] According to some embodiments of the utility model, a guide hole is opened on one side of the bracket, the guide hole passes through the upper side wall and / or the lower side wall of the U-portion accommodating groove, and the limiting strip is passed through the guide hole.

[0009] According to some embodiments of the utility model, the bracket is provided with at least two rows of the accommodating grooves arranged vertically, and the guide holes penetrate the U-portion accommodating grooves of at least two adjacent rows of the accommodating grooves.

[0010] According to some embodiments of the present invention, the U-portion receiving grooves of two adjacent rows of receiving grooves are offset left and right, and the guide holes are arranged to be inclined relative to the vertical direction.

[0011] According to some embodiments of the utility model, the limiting frame is slidably disposed on the bracket, and the sliding direction of the limiting frame is the same as the direction of the hole axis of the guide hole.

[0012] According to some embodiments of the present utility model, the limiting frame further includes a frame body, and the limiting strip is detachably disposed on the frame body.

[0013] According to some embodiments of the utility model, the frame body is provided with a plurality of mounting holes arranged along the left-right direction, and the limit bar is inserted into the mounting holes; a locking piece is detachably provided between the limit bar and the frame body, and the locking piece is used to lock or unlock the position of the limit bar relative to the frame body.

[0014] According to the second aspect of the present invention, the U-tube fixing device comprises a mounting seat, at least two of the above-mentioned U-tube positioning mechanisms and a movable driver. Part of the U-tube positioning mechanisms are fixedly arranged on the mounting seat, and another part of the U-tube positioning mechanisms are movably arranged on the mounting seat along the front-rear direction; the movable driver is arranged on the mounting seat and is used to drive the U-tube positioning mechanisms to move forward and backward.

[0015] The U-tube fixing device according to the embodiment of the second aspect of the utility model has at least the following beneficial effects: the mobile driver can drive part of the U-tube positioning mechanism to move forward and backward, which has better adaptability to the U-portion position of the U-tube of the heat exchanger, can be applied to heat exchangers of different specifications, and reduces production costs.

[0016] According to some embodiments of the present utility model, two U-tube positioning mechanisms are provided and arranged vertically.

[0017] The tube expander according to the third embodiment of the utility model includes the above-mentioned U-tube fixing device.

[0018] The tube expander according to the third embodiment of the utility model has at least the following beneficial effects: due to the use of the above-mentioned U-tube fixing device, it can be adapted to expand heat exchangers of various specifications and reduce production costs.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a three-dimensional schematic diagram of a U-tube fixing device according to an embodiment of the utility model;

[0022] Figure 2 For the utility model embodiment Figure 1 A local enlarged schematic diagram of point A;

[0023] Figure 3 For the utility model embodiment Figure 1 A cross-sectional schematic diagram in the BB direction;

[0024] Figure 4 For the utility model embodiment Figure 3 A local enlarged schematic diagram of point C.

[0025] Reference numerals:

[0026] U tube positioning mechanism 10;

[0027] The bracket 100, the U-portion receiving groove 110, and the guide hole 120;

[0028] Limiting frame 200, limiting strip 210, frame body 220;

[0029] Limit driving mechanism 300;

[0030] Mounting seat 400;

[0031] Mobile drive 500. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the 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.

[0034] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] Reference Figures 1 to 4 , is a U-tube positioning mechanism 10 according to an embodiment of the utility model, comprising a bracket 100, a limiting frame 200 and a limiting driving mechanism 300. The bracket 100 is provided with a row of accommodating grooves, which includes a plurality of U-portion accommodating grooves 110 arranged along the left-right direction, and the notches of the U-portion accommodating grooves 110 are arranged forward; the limiting frame 200 is provided with a plurality of limiting strips 210 arranged along the left-right direction, and the limiting strips 210 correspond to the U-portion accommodating grooves 110 of the row of accommodating grooves one by one, and the limiting strips 210 are spaced apart from the rear ends of the U-portion accommodating grooves 110, and the limiting frame 200 is movably arranged on the bracket 100, and the limiting frame 200 can move to a locking position and a yielding position, in which the limiting strip 210 blocks part of the notch of the corresponding accommodating groove, and in the yielding position, the limiting strip 210 yields to the notch of the corresponding accommodating groove; the limiting driving mechanism 300 is arranged between the bracket 100 and the limiting frame 200 and is used to drive the limiting frame 200 to move.

[0037] The U-tube positioning mechanism 10 moves close to the heat exchanger, and the U parts of the multiple U-shaped tubes of the heat exchanger enter the multiple U-part accommodating grooves 110 of the bracket 100. At this time, the limit drive mechanism 300 drives the limit frame 200 to move from the yielding position to the locking position, and the limit strip 210 blocks part of the notch of the U-part accommodating groove 110. At this time, the multiple limit strips 210 and the rear ends of the multiple U-part accommodating grooves 110 jointly limit the position of the U parts of the multiple U-shaped tubes. The limit drive mechanism 300 drives a limit frame 200 to cooperate with the bracket 100 to limit the U parts of the multiple U-shaped tubes, thereby simplifying the structure of the U-tube positioning mechanism 10 and reducing the production and manufacturing cost of the U-tube positioning mechanism 10.

[0038] In the embodiment, a guide hole 120 is provided on one side of the bracket 100, and the guide hole 120 passes through the upper side wall and the lower side wall of the U-portion receiving groove 110, and the limiting strip 210 is passed through the guide hole 120. The limiting strip 210 is passed through the guide hole 120, so that when the limiting strip 210 and the bottom of the U-portion receiving groove 110 limit the U-portion of the U-shaped tube, the hole wall of the guide hole 120 can limit the position of the guide strip, so that the guide strip is not easily damaged and bent by the U-shaped tube, thereby improving the durability of the limiting strip 210.

[0039] It is conceivable that the guide hole 120 may also only penetrate the upper side wall and the lower side wall of the U-portion receiving groove 110 .

[0040] In the embodiment, the bracket 100 is provided with two rows of receiving grooves arranged vertically, and the guide hole 120 penetrates the U-shaped receiving grooves 110 of two adjacent rows of receiving grooves. The guide hole 120 penetrates the upper and lower side walls of the two U-shaped receiving grooves 110, so that a limiting strip 210 can move to cover the notches of the two U-shaped receiving grooves 110 at the same time, and limit the two U-shaped tubes; that is, the limiting frame 200 can lock the U-shaped tubes of the two rows of receiving grooves, which is convenient for adapting to the heat exchanger with two rows of U-shaped tubes.

[0041] It is conceivable that the bracket 100 may also be provided with three or more rows of receiving grooves arranged in a vertical direction, and the guide holes 120 penetrate the U-portion receiving grooves 110 of two or more adjacent rows of receiving grooves.

[0042] In the embodiment, the U-portion receiving grooves 110 of two adjacent rows of receiving grooves are staggered left and right, and the guide holes 120 are arranged obliquely relative to the vertical direction. The above structure meets the arrangement position requirements of the U-shaped tubes of the general heat exchanger, has a simple structure, is easy to implement, and the position of the notch of each U-portion receiving groove 110 stopped by the limit strip 210 is basically the same.

[0043] In the embodiment, the limit frame 200 is slidably disposed on the bracket 100, and the sliding direction of the limit frame 200 is the same as the direction of the hole axis of the guide hole 120. The above structure facilitates the limit bar 210 to telescopically move along the guide hole 120, and the structure is simple and easy to implement. Specifically, a slide rail is provided on the bracket 100, and a slider is provided on the limit frame 200, and the slider is slidably connected to the slide rail, so that the limit frame 200 can slide relative to the bracket 100; the limit drive mechanism 300 includes a cylinder, and the piston rod of the cylinder is connected to the limit frame 200 to drive the limit frame 200 to slide.

[0044] It is conceivable that the limit frame 200 can also be movable relative to the bracket 100 through other structures. For example, a guide column is set on the bracket 100, and a guide sleeve is set on the limit frame 200. The guide column is inserted into the guide sleeve, so that the limit frame 200 can move relative to the bracket 100; the limit drive mechanism 300 can use a structure that outputs linear power such as an electric cylinder or an oil cylinder to drive the limit frame 200 to move; or the limit frame 200 can also be pivotally connected to the bracket 100, and through rotation, the limit bar 210 can cover part of the notch of the U-portion accommodating groove 110, or open the notch of the U-portion accommodating groove 110. At this time, the limit drive mechanism 300 can use a motor, and the motor drives the limit frame 200 to rotate.

[0045] In the embodiment, the limit frame 200 further includes a frame body 220, and the limit strip 210 is detachably disposed on the frame body 220. The limit strip 210 is slidably disposed in the guide hole 120, and the limit strip 210 is easily worn after long-term use. The limit strip 210 is set to be detachable. When the limit strip 210 is worn, the limit strip 210 can be removed and replaced with a new limit strip 210, which facilitates the maintenance of the limit frame 200 without completely remaking the limit frame 200, thereby saving material costs.

[0046] In the embodiment, the frame body 220 is provided with a plurality of mounting holes arranged in the left-right direction, and the limiting strip 210 is inserted into the mounting holes; a locking member is detachably provided between the limiting strip 210 and the frame body 220, and the locking member is used to lock or unlock the position of the limiting strip 210 relative to the frame body 220. After the limiting strip 210 is inserted into the mounting hole, the locking member locks the limiting strip 210 relative to the frame body 220, so that the limiting strip 210 is installed and fixed; when the limiting strip 210 needs to be removed, the locking member unlocks the position of the limiting strip 210 relative to the frame body 220, and then the limiting strip 210 can be pulled out and removed. With the above structure, the installation connection between the limiting strip 210 and the frame body 220 is relatively stable, and the limiting strip 210 is convenient to disassemble and install.

[0047] Specifically, the locking member is a screw, a through hole is provided in the frame body 220, a threaded hole is provided in the limit strip 210, and the screw is passed through the through hole and threadedly connected to the threaded hole. When the screw is tightened, the locking member locks the position of the limit strip 210 relative to the frame body 220, so that the position of the limit strip 210 is fixed and cannot be disassembled; when the screw is loosened, the limit strip 210 can be disassembled from the frame body 220. It is conceivable that the locking member can also be other structures, for example, the locking member adopts a latch, a latch hole is provided in the frame body 220, a latch hole is provided in the limit strip 210, and the latch is passed through the latch holes of the frame body 220 and the limit strip 210, so that the position of the limit strip 210 relative to the frame body 220 can be locked; when the latch is pulled out, the limit strip 210 can be disassembled.

[0048] It is conceivable that the limiting frame 200 may also be an integrally formed structure, which is relatively convenient to manufacture.

[0049] For some heat exchangers, there are two or more rows of U-shaped tubes arranged vertically, each row of U-shaped tubes includes a plurality of U-shaped tubes arranged in the left-right direction, and the lengths of some rows of U-shaped tubes are different, so that the front and rear positions of the U parts of some rows of U-shaped tubes are different, so further improvements are made:

[0050] The utility model also discloses a U-tube fixing device, comprising a mounting seat 400, two U-tube positioning mechanisms 10 and a moving driver 500. One of the U-tube positioning mechanisms 10 is fixedly arranged on the mounting seat 400, and the other U-tube positioning mechanism 10 is movably arranged on the mounting seat 400 along the front-rear direction; the moving driver 500 is arranged on the mounting seat 400 and is used to drive the U-tube positioning mechanism 10 to move forward and backward.

[0051] The above-mentioned U-tube fixing device, the movable driver 500 can drive part of the U-tube positioning mechanism 10 to move forward and backward, which has better adaptability to the U-portion position of the U-tube of the heat exchanger, can be applied to heat exchangers of different specifications, and reduces the production cost.

[0052] Specifically, one of the U-tube positioning mechanisms 10 can be moved forward and backward relative to the mounting seat 400 through a guide column and guide sleeve structure or a slide rail and slider structure; the mobile driver 500 uses a motor, a lead screw and a lead screw nut, and through the cooperation of the motor, the lead screw and the lead screw nut, one of the U-tube positioning mechanisms 10 can be moved forward and backward. It is conceivable that the mobile driver 500 can use a structure that outputs linear power, such as an electric cylinder and a linear motor, to drive the U-tube positioning mechanism 10 to move forward and backward. In the field of mechanics, there are many structures that drive one component to move relative to another component, which will not be described in detail here.

[0053] It is conceivable that the U-tube fixing device may also include three or more U-tube positioning mechanisms 10. In this case, some of the U-tube positioning mechanisms 10 may be fixed to the mounting seat 400, and the other part of the U-tube positioning mechanisms 10 may be moved forward and backward relative to the mounting seat 400. Technical personnel in this field may make specific configurations according to actual production needs.

[0054] In the embodiment, two U-tube positioning mechanisms 10 are provided and arranged vertically, so as to be convenient for adapting to the heat exchanger whose U portion has two front and rear positions. The structure is relatively simple and easy to implement.

[0055] The utility model also discloses a tube expander, which adopts the above-mentioned U-tube fixing device. Due to the adoption of the above-mentioned U-tube fixing device, the tube expander can be adapted to expand heat exchangers of various specifications, and the production cost is reduced.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A U-tube positioning mechanism, characterized in that: include: The bracket (100) is provided with a receiving groove row, wherein the receiving groove row includes a plurality of U-portion receiving grooves (110) arranged in a left-right direction, and the notches of the U-portion receiving grooves (110) are arranged forward; The limiting frame (200) is provided with a plurality of limiting strips (210) arranged in a left-right direction, the limiting strips (210) correspond to the U-portion receiving grooves (110) of the receiving groove row one by one, the limiting strips (210) are arranged at intervals with the rear ends of the U-portion receiving grooves (110), the limiting frame (200) is movably arranged on the bracket (100), and the limiting frame (200) can move to a locking position and a yielding position, in which the limiting strips (210) cover a portion of the corresponding notch of the receiving groove, and in the yielding position, the limiting strips (210) yield to the corresponding notch of the receiving groove; The limiting driving mechanism (300) is arranged between the bracket (100) and the limiting frame (200) and is used to drive the limiting frame (200) to move.

2. The U-tube positioning mechanism according to claim 1, characterized in that: A guide hole (120) is provided on one side of the bracket (100), the guide hole (120) passes through the upper side wall and / or the lower side wall of the U-portion accommodating groove (110), and the limiting strip (210) is passed through the guide hole (120).

3. The U-tube positioning mechanism according to claim 2, characterized in that: The bracket (100) is provided with at least two rows of accommodating grooves arranged in a vertical direction, and the guide hole (120) penetrates the U-portion accommodating grooves (110) of at least two adjacent rows of accommodating grooves.

4. The U-tube positioning mechanism according to claim 3, characterized in that: The U-portion accommodating grooves (110) of two adjacent rows of accommodating grooves are offset left and right, and the guide holes (120) are arranged to be inclined relative to the vertical direction.

5. The U-tube positioning mechanism according to claim 2, characterized in that: The limiting frame (200) is slidably arranged on the bracket (100), and the sliding direction of the limiting frame (200) is the same as the direction of the hole axis of the guide hole (120).

6. The U-tube positioning mechanism according to claim 1, characterized in that: The limiting frame (200) further comprises a frame body (220), and the limiting strip (210) is detachably arranged on the frame body (220).

7. The U-tube positioning mechanism according to claim 6, characterized in that: The frame body (220) is provided with a plurality of mounting holes arranged in a left-right direction, and the limiting strip (210) is inserted into the mounting holes; a locking member is detachably provided between the limiting strip (210) and the frame body (220), and the locking member is used to lock or unlock the position of the limiting strip (210) relative to the frame body (220).

8. A U-tube fixing device, characterized in that: include: Mounting seat (400); at least two U-tube positioning mechanisms (10) according to any one of claims 1 to 7, part of the U-tube positioning mechanisms (10) being fixedly arranged on the mounting seat (400), and another part of the U-tube positioning mechanisms (10) being movably arranged on the mounting seat (400) along the front-rear direction; A moving driver (500) is arranged on the mounting seat (400) and is used to drive the U-tube positioning mechanism (10) to move forward and backward.

9. The U-tube fixing device according to claim 8, characterized in that: The U-tube positioning mechanisms (10) are provided with two and are arranged vertically.

10. A tube expander, characterized in that: It comprises the U-tube fixing device as described in any one of claims 8 to 9.

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