Pipe orifice locking device and pipe expander

Abstract

The utility model discloses a pipe orifice locking device. The pipe orifice locking device comprises a seat body, two clamping structures and a locking driving assembly, the two clamping structures are movably arranged on the base body and can be close to or far away from each other, the two clamping structures are arranged side by side, a plurality of pipe containing grooves are formed in the sides, close to each other, of the clamping structures, and notches of the pipe containing grooves of the two clamping structures are opposite to each other one by one; the locking driving assembly is arranged on the base body and comprises a locking driver and a transmission mechanism, and the locking driver can drive the two clamping structures to move synchronously through the transmission mechanism. According to the structure, the locking driver is matched with the transmission mechanism to synchronously drive the two clamping structures to move, so that the moving synchronism of the two clamping structures is good, errors of the stop positions of the two clamping structures can be reduced when the two clamping structures clamp the pipe opening ends each time, and the consistency of the pipe opening ends is improved. The utility model further discloses a pipe expander adopting the pipe orifice locking device.

Description

Technical Field

[0001] The utility model relates to the field of heat exchanger production, in particular to a pipe opening locking device and a pipe expanding machine. Background Art

[0002] The heat exchanger includes a fin group and a U-shaped tube. The middle part of the U-shaped tube is inserted into the fin group, and the tube mouth end and the U end of the U-shaped tube extend out of the fin group. The heat exchanger needs to be expanded during the production process, and the heat exchanger can be expanded on a tube expander. The tube expander includes a tube expansion platform, an expansion rod mechanism, a fixing device and a tube mouth locking device. The fixing device can clamp and fix the fin group part of the heat exchanger placed on the tube expansion platform, and the tube mouth locking device can clamp and position or loosen the tube mouth end of the U-shaped tube. The expansion rod of the expansion rod mechanism can be inserted from the tube mouth into the straight tube section of the U-shaped tube to expand the straight tube section of the U-shaped tube, so that the U-shaped tube is more tightly connected to the fin group.

[0003] The existing pipe mouth locking device includes a base, two clamping structures and two locking drivers, and the two locking drivers respectively drive the two clamping structures to move closer to or farther from each other to clamp or release the pipe mouth end of the U-shaped pipe. However, in the existing pipe mouth locking device, the two clamping structures may have errors in the stop position each time they clamp the pipe mouth end, affecting the consistency of the pipe mouth end. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a pipe mouth locking device, which can reduce the error of the staying position of the two clamping structures each time when clamping the pipe mouth end, and improve the consistency of the pipe mouth end.

[0005] The utility model also provides a tube expander with the tube opening locking device.

[0006] According to the first embodiment of the utility model, the pipe mouth locking device comprises a seat body, two clamping structures and a locking drive assembly. The two clamping structures are movably arranged on the seat body and can move closer to or farther from each other, the two clamping structures are arranged side by side, and a plurality of pipe receiving grooves are arranged on the side where the clamping structures are close to each other, and the notches of the pipe receiving grooves of the two clamping structures are opposite to each other; the locking drive assembly is arranged on the seat body, and the locking drive assembly comprises a locking drive and a transmission mechanism, and the locking drive can drive the two clamping structures to move synchronously through the transmission mechanism.

[0007] According to the pipe mouth locking device of the first aspect of the utility model, there are at least the following beneficial effects: when it is necessary to lock the pipe mouth end of the U-tube of the heat exchanger, the locking driver of the locking drive assembly synchronously drives the two pairs of clamping structures to approach each other through the transmission mechanism, and at this time, the tube accommodating grooves on the two clamping structures respectively accommodate the radial side of the pipe mouth end of the limited U-tube, and the two tube accommodating grooves cooperate to firmly lock and fix the pipe mouth end of the U-tube; when it is necessary to loosen the pipe mouth end of the U-tube, the locking driver can synchronously drive the paired clamping structures to move away from each other and reset through the transmission mechanism; the above-mentioned structure, through the locking driver and the transmission mechanism, synchronously drives the two clamping structures to move, so that the movement synchronization of the two clamping structures is better, thereby reducing the error of the stop position of the two clamping structures each time they clamp the pipe mouth end, and improving the consistency of the pipe mouth end.

[0008] According to some embodiments of the utility model, the transmission mechanism includes a connecting frame and two transmission rod groups, the clamping structure is connected to the base body along a vertical sliding direction, the connecting frame is slidably arranged on the base body along a left-right direction, the transmission rod group includes at least one transmission rod, the two clamping structures are pivotally connected to the transmission rods of the two transmission rod groups one by one, the opposite ends of the transmission rod are respectively pivotally connected to the connecting frame and the clamping structure, and the locking driver is used to drive the connecting frame to move.

[0009] According to some embodiments of the present invention, the transmission rod group includes four transmission rods arranged at intervals along the left-right direction.

[0010] According to some embodiments of the present utility model, the seat body is provided with a left limit block and a right limit block, and the connecting frame is located between the left limit block and the right limit block.

[0011] According to some embodiments of the utility model, the connecting frame includes a vertical rod portion and two cross rod portions, the vertical ends of the vertical rod portion are respectively connected to one end of the two cross rod portions, the vertical rod portion and the two cross rod portions are combined to form a accommodating frame, and the two clamping structures and the two transmission rod groups are all located in the accommodating frame.

[0012] According to some embodiments of the utility model, the tube accommodating groove is a semicircular groove, and the two clamping structures have a clamping position and a release position. In the clamping position, the groove edges of the tube accommodating grooves of the two clamping structures are butted against each other, and the tube accommodating grooves of the two clamping structures relative to each other are enclosed to form a tube clamping hole; in the release position, the groove edges of the tube accommodating grooves of the two clamping structures are spaced apart.

[0013] According to some embodiments of the utility model, the clamping structure is vertically slidably connected to the base body, and the clamping structure is vertically arranged with at least two rows of accommodating grooves, each of the rows of accommodating grooves includes a plurality of tube accommodating grooves arranged along the left-right direction, and the tube accommodating grooves of all the rows of accommodating grooves are staggered along the left-right direction.

[0014] According to some embodiments of the utility model, the clamping structure is provided with two rows of the accommodating grooves, and one side of the clamping structure is provided with a plurality of protrusion portions arranged at intervals along the left-right direction, and a recessed groove is formed between two adjacent protrusion portions, wherein the tube accommodating grooves of one of the accommodating groove rows are arranged one-to-one at one end of the protrusion portion, and the tube accommodating grooves of the other accommodating groove row are arranged one-to-one at the bottom of the recessed groove, and the protrusion portion of one clamping structure is opposite to the recessed groove of the other clamping structure.

[0015] According to some embodiments of the present invention, air-avoiding grooves are provided on both the left and right sides of the protruding block.

[0016] The tube expander according to the second embodiment of the utility model comprises the above-mentioned tube opening locking device.

[0017] The tube expander according to the embodiment of the second aspect of the utility model has at least the following beneficial effects: due to the use of the above-mentioned tube mouth locking device, the consistency of clamping the tube mouth end can be improved during the tube expansion process.

[0018] 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

[0019] 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:

[0020] Figure 1 A schematic diagram of a pipe opening locking device according to an embodiment of the utility model;

[0021] Figure 2 For the utility model embodiment Figure 1 A local enlarged schematic diagram of point A;

[0022] Figure 3 It is a schematic diagram of a partial structure of a pipe opening locking device according to an embodiment of the utility model;

[0023] Figure 4 For the utility model embodiment Figure 3 A local enlarged schematic diagram of point B.

[0024] Reference numerals:

[0025] The seat body 100, the left limit block 110, and the right limit block 120;

[0026] The clamping structure 200, the tube receiving groove 210, the convex block portion 220, the concave groove 230, the air-avoiding groove 240, and the detection portion 250;

[0027] Locking drive assembly 300, locking driver 310, connecting frame 320, vertical rod portion 321, horizontal rod portion 322, transmission rod 330;

[0028] Distance sensor 400. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Reference Figures 1 to 4, is a pipe mouth locking device of an embodiment of the utility model, comprising a base body 100, two clamping structures 200 and a locking drive assembly 300. The two clamping structures 200 are movably arranged on the base body 100 and can move closer to or farther away from each other. The two clamping structures 200 are arranged side by side, and a plurality of pipe receiving grooves 210 are arranged on one side of the clamping structures 200 close to each other, and the notches of the pipe receiving grooves 210 of the two clamping structures 200 are opposite to each other; the locking drive assembly 300 is arranged on the base body 100, and the locking drive assembly 300 includes a locking drive 310 and a transmission mechanism, and the locking drive 310 can drive the two clamping structures 200 to move synchronously through the transmission mechanism.

[0034] When it is necessary to lock the tube end of the U-shaped tube of the heat exchanger, the locking driver 310 of the locking drive assembly 300 synchronously drives the two pairs of clamping structures 200 to approach each other through the transmission mechanism. At this time, the tube accommodating grooves 210 on the two clamping structures 200 respectively accommodate the radial side of the tube end of the limited U-shaped tube, and the two tube accommodating grooves 210 cooperate to firmly lock and fix the tube end of the U-shaped tube; when it is necessary to loosen the tube end of the U-shaped tube, the locking driver 310 can synchronously drive the paired clamping structures 200 to move away from each other and reset through the transmission mechanism; the above structure, through the locking driver 310 and the transmission mechanism to synchronously drive the two clamping structures 200 to move, the movement synchronization of the two clamping structures 200 is better, thereby reducing the error of the stop position of the two clamping structures 200 each time they clamp the tube end, and improving the consistency of the tube end.

[0035] Specifically, three or more tube accommodating grooves 210 are arranged on the clamping structure 200, and those skilled in the art can configure them specifically according to actual needs.

[0036] In the embodiment, the transmission mechanism includes a connecting frame 320 and two transmission rod groups, the clamping structure 200 is connected to the base body 100 in a vertical sliding manner, the connecting frame 320 is slidably arranged on the base body 100 in a left-right direction, the transmission rod 330 group includes at least one transmission rod 330, the two clamping structures 200 are pivotally connected to the transmission rods 330 of the two transmission rod groups in a one-to-one correspondence, the opposite ends of the transmission rod 330 are pivotally connected to the connecting frame 320 and the clamping structure 200 respectively, and the locking driver 310 is used to drive the connecting frame 320 to move. In the above structure, the locking driver 310 can synchronously drive the two clamping structures 200 to move through the connecting frame 320 and the two transmission rod groups, so that it is convenient to control the clamping degree of the two clamping structures 200 clamping the pipe mouth end of the U-shaped pipe, and the two clamping structures 200 have a smaller stop position error when clamping the pipe mouth end, thereby improving the clamping consistency of the clamping structure 200 during repeated operations.

[0037] Specifically, the transmission rod 330 group includes four transmission rods 330 arranged at intervals along the left-right direction. One end of the four transmission rods 330 of each transmission rod 330 group is pivotally connected to the clamping structure 200, and the other end is pivotally connected to the connecting frame 320, so that the connecting frame 320 can drive the clamping structure 200 to move relatively smoothly through the four transmission rods 330, avoiding the risk of accelerated wear of the clamping structure 200 caused by uneven force on the left and right sides of the clamping structure 200.

[0038] It is conceivable that the transmission rod 330 group may also include one, two, three or more transmission rods 330, and those skilled in the art may configure the transmission rods 330 according to actual needs.

[0039] Specifically, the clamping structure 200 is provided with a guide column in the vertical direction, and the seat body 100 is provided with a guide sleeve, and the guide column is inserted into the guide sleeve, so that the clamping structure 200 can move vertically relative to the seat body 100. It is conceivable that the clamping structure 200 can also be provided with a slider, and the seat body 100 is provided with a slide rail in the vertical direction, and the slider is slidably connected to the slide rail, so that the clamping structure 200 can slide vertically relative to the seat body 100.

[0040] Specifically, the connecting frame 320 is provided with a slider, the base body 100 is provided with a slide rail in the left-right direction, and the slider is slidably connected to the slide rail, so that the connecting frame 320 can slide in the left-right direction relative to the base body 100. It is conceivable that a guide column can be provided in the left-right direction of the base body 100, a guide sleeve can be provided on the connecting frame 320, and the guide column is inserted into the guide sleeve, so that the connecting frame 320 can move left-right relative to the base body 100.

[0041] Specifically, the locking driver 310 includes a motor and a lead screw, and the connecting frame 320 is provided with a lead screw nut, which cooperates with the lead screw, and the motor drives the lead screw to rotate, driving the connecting frame 320 to move left and right. It is conceivable that the locking driver 310 can also be a structure that outputs linear power using an electric cylinder or an oil cylinder.

[0042] It is conceivable that the locking drive assembly 300 may also be other structures. For example, the locking drive assembly 300 includes two electric cylinders, and the two electric cylinders respectively drive the two clamping structures 200 to move.

[0043] It is conceivable that the transmission mechanism can also include a connecting frame 320, which is slidably connected to the base body 100 along the left and right directions, and the connecting frame 320 is provided with an inclined guide rail, and the clamping structure 200 is provided with a guide block, which is slidably connected to the guide rail. When the locking driver 310 drives the connecting frame 320 to move left and right, the connecting frame 320 can drive the clamping structure 200 to move vertically through the guide rail and the guide block.

[0044] In the embodiment, the seat body 100 is provided with a left limit block 110 and a right limit block 120, and the connecting frame 320 is located between the left limit block 110 and the right limit block 120. The left limit block 110 and the right limit block 120 are provided so that the connecting frame 320 can be limited by the left limit block 110 and the right limit block 120 when sliding left and right, thereby avoiding the risk of excessive movement of the connecting frame 320.

[0045] In the embodiment, the connecting frame 320 includes a vertical rod portion 321 and two horizontal rod portions 322. The vertical ends of the vertical rod portion 321 are respectively connected to one end of the two horizontal rod portions 322. The vertical rod portion 321 and the two horizontal rod portions 322 enclose a receiving frame, and the two clamping structures 200 and the two transmission rod groups are all located in the receiving frame. The above layout makes the structure of the pipe mouth locking device relatively compact and saves space.

[0046] In the embodiment, the tube receiving groove 210 is a semicircular groove, and the two clamping structures 200 have a clamping position and a loosening position. In the clamping position, the notch peripheries of the tube receiving grooves 210 of the two clamping structures 200 are butted, and the tube receiving grooves 210 of the two clamping structures 200 are enclosed to form a tube clamp hole; in the loosening position, the notch peripheries of the tube receiving grooves 210 of the two clamping structures 200 are arranged at intervals. The tube receiving groove 210 is a semicircular groove, and the two tube receiving grooves 210 are enclosed to form a circular hole, so as to adapt to the cross-section of the U-shaped tube, facilitate contact and lock various positions of the outer periphery of the U-shaped tube, and the locking effect is relatively good, and the locking force is relatively evenly distributed on the outer periphery of the U-shaped tube. It is conceivable that the tube receiving groove 210 can also be a groove of other shapes, such as an arc groove, a rectangular groove, etc., and those skilled in the art can make specific configurations according to actual needs.

[0047] For some heat exchangers, which have two U-shaped tube rows arranged in the vertical direction, each U-shaped tube row includes a plurality of U-shaped tubes arranged in the left-right direction, further improvements are made.

[0048] In the embodiment, the clamping structure 200 is slidably connected to the base body 100 in the vertical direction, and the clamping structure 200 is provided with two rows of accommodating grooves arranged in the vertical direction, each row of accommodating grooves includes a plurality of tube accommodating grooves 210 arranged in the left-right direction, and the tube accommodating grooves 210 of all accommodating groove rows are staggered in the left-right direction. As a result of the above, by staggering the two rows of tube accommodating grooves 210 in the left-right direction, the two clamping structures 200 can clamp two rows of U-shaped tubes at the same time, simplifying the structure of the tube mouth locking device.

[0049] It can be understood that when some heat exchangers have three or more rows of U-shaped tubes arranged vertically, and each row of U-shaped tubes is offset left and right, the above-mentioned clamping structure 200 can also be provided with three or more rows of accommodating grooves to clamp each row of U-shaped tubes at one time, so that the above-mentioned tube mouth locking device has relatively wide applicability.

[0050] In the embodiment, the clamping structure 200 is provided with two rows of receiving grooves, and a plurality of protrusions 220 are arranged at intervals along the left-right direction on one side of the clamping structure 200, and a recessed groove 230 is formed between two adjacent protrusions 220, and the tube receiving grooves 210 of one row of receiving grooves are arranged at one end of the protrusions 220 in a one-to-one correspondence, and the tube receiving grooves 210 of the other row of receiving grooves are arranged at the bottom of the recessed grooves 230 in a one-to-one correspondence, and the protrusions 220 of one clamping structure 200 are opposite to the recessed grooves 230 of the other clamping structure 200. The above structure is convenient to use two clamping structures 200, and two rows of tube clamping holes can be formed to clamp the tube ends of the two rows of U-shaped tubes of the heat exchanger, and the structure is simple and easy to implement.

[0051] Specifically, the number of the protrusions 220 is determined according to the number of U-tubes of the heat exchanger, and those skilled in the art can configure the specific configuration according to actual needs.

[0052] In the embodiment, both left and right sides of the protrusion 220 are provided with a clearance groove 240. When the two clamping structures 200 are switched to the clamping position, the protrusion 220 will be inserted into the recessed portion to form two rows of pipe clamp holes. The clearance groove 240 is provided to facilitate the insertion of the protrusion 220 into the recessed groove 230, and can reduce the friction between the protrusions 220 of the two clamping structures 200, thereby extending the service life of the clamping structure 200.

[0053] Specifically, the air-avoiding groove 240 is an arc-shaped groove, so that the strength of the protruding block 220 is relatively good. It is conceivable that the air-avoiding groove 240 can also be a square groove or other structure, and those skilled in the art can configure it specifically according to actual needs.

[0054] In the embodiment, one of the two clamping structures 200 is provided with a distance sensor 400, and the other is provided with a detection unit 250, and the distance sensor 400 is opposite to the detection unit 250. The distance sensor 400 is provided to facilitate the detection of the distance between the two clamping structures 200, and to provide a physical basis for the automatic control of the nozzle locking device. Specifically, the distance sensor 400 is a common structure in the market, and will not be described in detail here.

[0055] Specifically, the two clamping structures 200 are each provided with a distance sensor 400 and a detection unit 250, wherein one distance sensor 400 is located at the left end of the clamping structure 200, and the other distance sensor 400 is located at the right end of the clamping structure 200, so as to conveniently detect whether the movements of the left and right ends of the two clamping structures 200 are balanced, thereby improving the safety of the pipe mouth locking device.

[0056] The utility model also discloses a tube expander adopting the tube mouth locking device. Due to the adoption of the tube mouth locking device, the consistency of clamping the tube mouth end can be improved in the tube expansion process.

[0057] 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.

[0058] 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 pipe opening locking device, characterized in that: include: base(100); Two clamping structures (200) are movably arranged on the base (100) and can move closer to or farther from each other. The two clamping structures (200) are arranged side by side. A plurality of tube accommodating grooves (210) are arranged on one side of the clamping structures (200) close to each other. The notches of the tube accommodating grooves (210) of the two clamping structures (200) are opposite to each other. A locking drive assembly (300) is arranged on the base (100), the locking drive assembly (300) comprising a locking drive (310) and a transmission mechanism, the locking drive (310) being able to drive the two clamping structures (200) to move synchronously through the transmission mechanism; The clamping structure (200) is vertically slidably connected to the seat body (100); the clamping structure (200) is vertically arranged with at least two accommodating groove rows, each of which comprises a plurality of tube accommodating grooves (210) arranged in the left-right direction, and the tube accommodating grooves (210) of all the accommodating groove rows are staggered in the left-right direction; the clamping structure (200) is provided with two accommodating groove rows, and a plurality of protruding block portions are arranged at intervals in the left-right direction on one side of the clamping structure (200). (220), a recessed groove (230) is formed between two adjacent protrusions (220), wherein the tube receiving grooves (210) of one of the receiving groove rows are arranged one-to-one at one end of the protrusions (220), and the tube receiving grooves (210) of the other of the receiving groove rows are arranged one-to-one at the bottom of the recessed groove (230), wherein the protrusions (220) of one clamping structure (200) are opposite to the recessed groove (230) of the other of the clamping structures (200).

2. The pipe opening locking device according to claim 1, characterized in that: The transmission mechanism comprises a connecting frame (320) and two transmission rod groups, the clamping structure (200) is connected to the base body (100) in a vertical sliding manner, the connecting frame (320) is slidably arranged on the base body (100) in a left-right direction, the transmission rod group comprises at least one transmission rod (330), the two clamping structures (200) are pivotally connected to the transmission rods (330) of the two transmission rod groups in a one-to-one correspondence, the opposite ends of the transmission rod (330) are pivotally connected to the connecting frame (320) and the clamping structure (200), respectively, and the locking driver (310) is used to drive the connecting frame (320) to move.

3. The pipe opening locking device according to claim 2, characterized in that: The transmission rod group comprises four transmission rods (330) arranged at intervals in the left-right direction.

4. The pipe opening locking device according to claim 2, characterized in that: The seat body (100) is provided with a left limit block (110) and a right limit block (120), and the connecting frame (320) is located between the left limit block (110) and the right limit block (120).

5. The pipe opening locking device according to claim 2, characterized in that: The connecting frame (320) comprises a vertical rod portion (321) and two horizontal rod portions (322); the vertical ends of the vertical rod portion (321) are respectively connected to one end of the two horizontal rod portions (322); the vertical rod portion (321) and the two horizontal rod portions (322) are enclosed to form a containing frame; the two clamping structures (200) and the two transmission rod groups are both located in the containing frame.

6. The pipe opening locking device according to claim 1, characterized in that: The tube accommodating groove (210) is a semicircular groove, and the two clamping structures (200) have a clamping position and a loosening position. In the clamping position, the notch edges of the tube accommodating grooves (210) of the two clamping structures (200) are butted against each other, and the tube accommodating grooves (210) of the two clamping structures (200) that are opposite to each other are enclosed to form a tube clamping hole; in the loosening position, the notch edges of the tube accommodating grooves (210) of the two clamping structures (200) are spaced apart.

7. The pipe opening locking device according to claim 1, characterized in that: The left and right sides of the protruding block (220) are both provided with air-avoiding grooves (240).

8. A tube expander, characterized in that: It comprises the pipe mouth locking device according to any one of claims 1 to 7.

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