Flaring device

Abstract

The utility model relates to the field of pipeline machining, in particular to a flaring device. The flaring device comprises a fixing seat, a plurality of flaring assemblies and a driving assembly, a plurality of mounting holes are formed in the fixing seat, each flaring assembly is mounted in the corresponding mounting hole, the driving assembly comprises a plurality of push rods, at least part of each push rod extends into the corresponding mounting hole and moves in the axial direction of the corresponding mounting hole, and the driving assembly drives the corresponding flaring assembly to rotate. The flaring assembly comprises a clamping jaw, a fixing sleeve and an ejector pin which are coaxially arranged, a hollow cavity is formed in the fixing sleeve, the clamping jaw is installed in the hollow cavity, one end of the clamping jaw extends out of the hollow cavity, the ejector pin is located in the hollow cavity, one end of the ejector pin abuts against the push rod, and the other end of the ejector pin can extend into the clamping jaw along with movement of the push rod. And the outer diameter of the clamping jaw is enlarged by abutting against the inner wall of the clamping jaw. The pipe orifice flaring device has the advantages that multiple pipe orifices can be subjected to flaring treatment at the same time, and the positions of the flaring assemblies can be flexibly adjusted through the forming positions of the abutting faces on the fixing sleeves, so that the pipe orifice flaring device is suitable for pipe orifices with different intervals.

Description

Technical Field

[0001] The utility model relates to the field of pipeline processing, in particular to a flaring device. Background Art

[0002] The heat exchanger has multiple pipes for the flow of heat exchange medium. During the production process, the ports of these pipes need to be expanded to increase the inner diameter of the ports to facilitate the connection of the pipes.

[0003] The existing flaring device generally cooperates with an electric drill and a flaring assembly. The flaring assembly is driven to rotate by the electric drill to perform flaring processing on a single pipe port. This processing method is inefficient. Utility Model Content

[0004] Based on this, the utility model provides a flaring device to solve the above technical problems.

[0005] A flaring device, the flaring device comprising: a fixing seat, a plurality of mounting holes being formed on the fixing seat; a plurality of flaring assemblies, each of the flaring assemblies being mounted in the mounting holes in a one-to-one correspondence; a driving assembly comprising a plurality of push rods, at least a portion of each of the push rods extending into the mounting holes and being able to move axially along the mounting holes; wherein the flaring assembly comprises a coaxially arranged jaw, a fixing sleeve and an ejector pin, the fixing sleeve having a hollow cavity therein, the jaw being mounted in the hollow cavity and one end extending out of the hollow cavity, the ejector pin being located in the hollow cavity and one end abutting against the push rod, and the other end being able to extend into the jaw as the push rod moves, and abutting against the inner wall of the jaw to expand the outer diameter of the jaw.

[0006] With such a configuration, the push rod can abut against the ejector pin when it moves along the mounting hole. The ejector pin moves toward the clamping jaw in response to the driving force of the push rod and abuts against the inner wall of the clamping jaw, and stretches the clamping jaw to expand the outer diameter of the clamping jaw. One end of the clamping jaw passes through the hollow cavity in the fixed sleeve, so that the outer wall of the end that passes through abuts against the pipe opening that needs to be expanded to realize the expansion process. And because there are multiple expansion assemblies, each of which is installed in the mounting hole, multiple expansion assemblies can be simultaneously extended into multiple pipe openings for expansion processing. And it will not affect the structural strength of the pipe opening.

[0007] In one embodiment, the fixing sleeve is loosely matched with the mounting hole, and an abutment plane is provided on the outer wall of the fixing sleeve, a limiting member is provided between the abutment plane and the fixing seat, one end of the limiting member abuts against the abutment plane, and the other end is connected to the fixing seat.

[0008] In one embodiment, a plurality of the abutting planes are formed in the circumferential direction of the fixed sleeve, and two adjacent abutting planes are arranged at an angle. A limiting member is provided between each abutting plane and the fixed seat.

[0009] In one embodiment, the clamping jaw includes a plurality of split jaws, and the plurality of split jaws surround and form the clamping jaw in the circumferential direction. When the split jaws are away from each other, the outer diameter of the clamping jaw expands, and when the split jaws approach each other, the outer diameter of the clamping jaw shrinks;

[0010] A groove is formed in the circumferential direction of the clamping jaw, and an elastic member is installed in the groove. The inner diameter of the elastic member is smaller than the outer diameter of the bottom of the groove of the clamping jaw in the state of the smallest outer diameter.

[0011] In one embodiment, the clamping jaw includes an insertion portion and a tapered portion. The insertion portion is connected to one end of the tapered portion away from the fixed seat. Along the axial direction of the clamping jaw, the outer diameter of the insertion portion is consistent, and the outer diameter of the tapered portion gradually increases along the direction close to the fixed seat. The outer diameter of the insertion portion is smaller than the minimum outer diameter of the tapered portion.

[0012] In one embodiment, the clamping jaw further includes a connecting portion. The connecting portion is connected to the side of the tapered portion away from the insertion portion, and the connecting portion is located in the fixed sleeve. The ejector pin includes a tapered section and a diameter section connected to each other. The taper of the tapered section is adapted to the tapered portion, and the diameter section is located in the connecting portion and is in sliding fit with the inner wall of the connecting portion.

[0013] In one embodiment, the fixed sleeve includes a fixed section, an enlarged diameter section, and a reduced diameter section connected in sequence. The fixed section is installed in the installation hole. The diameter of the enlarged diameter section is larger than that of the fixed section, and the side surface of the enlarged diameter section facing the fixed seat abuts against the fixed seat. The clamping jaw is installed in the reduced diameter section.

[0014] In one embodiment, the flaring device further includes a locking ring. The locking ring is sleeved on the outer peripheral side of the reduced diameter section, and the locking ring extends in a direction away from the enlarged diameter section. A part of the clamping jaw is located in the locking ring, and an elastic member is installed between the clamping jaw and the locking ring.

[0015] In one embodiment, an installation hole is formed in the locking ring, an installation plane is formed on the outer side surface of the reduced diameter section, and a connecting member is arranged in the installation hole. One end of the connecting member abuts against the installation plane.

[0016] In one embodiment, the flaring device further includes a mounting plate, a driving source, and a driving plate. The fixed seat is connected to one side of the driving plate, and the driving plate is located within the fixed seat. The driving source is installed on the side of the mounting plate facing away from the fixed seat and is connected to the driving plate through the mounting plate. The driving source is capable of driving the driving plate to move axially along the fixed seat, and a plurality of the push rods are connected to the driving plate.

[0017] Compared with the prior art, the flaring device provided by the present utility model integrates a plurality of flaring components on one fixed seat. Therefore, it can perform flaring treatment on multiple pipe orifices simultaneously, and each flaring component can flexibly adjust its position through the opening position of the abutting surface on the fixed sleeve to control the interval between the flaring components, so as to adapt to pipe orifices with different spacings. Description of the Drawings

[0018] Figure 1 It is an exploded view of the structure of one embodiment of the flaring device provided by the present utility model;

[0019] Figure 2 It is an exploded view of the structure of one embodiment of the flaring device provided by the present utility model from another angle;

[0020] Figure 3 It is a schematic diagram of the structure of one embodiment of the flaring device provided by the present utility model;

[0021] Figure 4 It is a partial schematic diagram of the structure of one embodiment of the flaring device provided by the present utility model;

[0022] Figure 5 It is an exploded view of the structure of the flaring component of one embodiment of the flaring device provided by the present utility model;

[0023] Figure 6 It is a schematic diagram of the structure of the flaring component of one embodiment of the flaring device provided by the present utility model.

[0024] The meanings represented by the symbols in the figure are as follows:

[0025] 100. Flaring device; 10. Fixed seat; 11. Mounting hole; 12. Limiting member; 20. Flaring assembly; 21. Claw; 211. Split claw; 212. Groove; 213. Elastic member; 214. Insertion portion; 215. Tapered portion; 216. Connecting portion; 22. Fixed sleeve; 221. Hollow cavity; 222. Fixed section; 2221. Abutting plane; 223. Diameter-expanded section; 224. Diameter-reduced section; 2241. Mounting plane; 23. Thimble; 231. Tapered section; 232. Diameter section; 30. Driving assembly; 31. Driving source; 32. Driving plate; 33. Push rod; 40. Locking ring; 41. Connecting hole; 42. Connecting member; 50. Mounting plate. Detailed implementation manners

[0026] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when a mechanism is referred to as "fixed to" or "disposed on" another mechanism, it can be directly on the other mechanism or there can also be an intermediate mechanism. When a mechanism is considered to be "connected" to another mechanism, it can be directly connected to the other mechanism or there may be an intermediate mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" or "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0031] Please refer to Figures 1-6 , the present utility model provides a flaring device 100, which integrates a plurality of flaring components 20 and can simultaneously flare the ports of multiple pipelines in a heat exchanger to improve production efficiency.

[0032] The flaring device 100 includes a fixed seat 10, a plurality of flaring components 20 and a driving component 30. A plurality of mounting holes 11 are formed in the fixed seat 10, and each flaring component 20 is correspondingly mounted in the mounting hole 11. The driving component 30 includes a plurality of push rods 33, and at least a part of each push rod 33 extends into the mounting hole 11 and moves along the axial direction of the mounting hole 11. Among them, the flaring component 20 includes a clamping jaw 21, a fixed sleeve 22 and a thimble 23 which are coaxially arranged. The fixed sleeve 22 has a hollow cavity 221 inside. The clamping jaw 21 is mounted inside the hollow cavity 221, and one end extends out of the hollow cavity 221. The thimble 23 is located inside the hollow cavity 221, one end abuts against the push rod 33, and the other end can extend into the clamping jaw 21 as the push rod 33 moves and abut against the inner wall of the clamping jaw 21 to expand the outer diameter of the clamping jaw 21.

[0033] In this way, the push rod 33 can abut against the ejector pin 23 along the movement of the mounting hole 11. The ejector pin 23 moves toward the clamping jaw 21 in response to the driving force of the push rod 33, and abuts against the inner wall of the clamping jaw 21, and stretches the clamping jaw 21, so that the outer diameter of the clamping jaw 21 is expanded, and one end of the clamping jaw 21 passes through the hollow cavity 221 in the fixed sleeve 22, so that the outer wall of the end that passes through abuts against the pipe mouth that needs to be expanded to realize the expansion process. And because there are multiple expansion assemblies 20, each of which is installed in the mounting hole 11, multiple expansion assemblies 20 can be simultaneously extended into multiple pipe mouths for expansion processing. And it will not affect the structural strength of the pipe mouth.

[0034] Furthermore, the fixing sleeve 22 and the mounting hole 11 are clearance-matched, so the fixing sleeve 22 can move in the mounting hole 11 along the radial direction, which facilitates the fixing sleeve 22 to be assembled in the mounting hole 11. The outer wall of the fixing sleeve 22 is provided with an abutting plane 2221, and a limiting member 12 is provided between the abutting plane 2221 and the fixing seat 10, one end of the limiting member 12 abuts against the abutting plane 2221, and the other end is connected to the fixing seat 10, so when the limiting member 12 is pressed against the abutting plane 2221, the outer wall of the fixing sleeve 22 except the abutting plane 2221 will also be pressed against the hole wall of the mounting hole 11, so as to achieve a fixed connection.

[0035] Furthermore, a plurality of abutting planes 2221 are formed in the circumferential direction of the fixing sleeve 22, and two adjacent abutting planes 2221 are arranged at an angle. A limiting member 12 is provided between each abutting plane 2221 and the fixing base 10. Therefore, the fixing sleeve 22 can select one or any plurality of abutting planes 2221 in its circumferential direction to achieve a fixed connection with the hole wall of the mounting hole 11 through the limiting member 12 according to the position and direction of the formed abutting planes 2221, and thus can control its position fixed in the mounting hole 11, so as to set the interval distance between the flaring assemblies 20, so that the flaring assemblies 20 are adapted to pipe orifices with different intervals. For example, when it is necessary to increase the distance between two flaring assemblies 20, the abutting plane 2221 on the fixing sleeve 22 in one of the flaring assemblies 20 can be formed on the side facing the other fixing sleeve 22. Therefore, the limiting member 12 is arranged on one side of one fixing sleeve 22 close to the other fixing sleeve 22, and presses the fixing sleeve 22 so that the wall surface without the formed abutting plane 2221 abuts against the hole wall of the mounting hole 11, which makes the fixing sleeve 22 further away from the other fixing sleeve 22. The other fixing sleeve 22 also forms an abutting plane 2221 on the side facing the previous fixing sleeve 22 and is also pressed by the limiting member 12, thus realizing the mutual separation between the two fixing sleeves 22, that is, the distance is increased. On the contrary, when it is necessary to reduce the distance between two flaring assemblies 20, the abutting planes 2221 can be formed on the two sides where the two fixing sleeves 22 are away from each other. When it is necessary to have a height difference between two flaring assemblies 20, the abutting plane 2221 can be formed on the upper side of one fixing sleeve 22 and the lower side of one fixing sleeve 22, and so on. Details are not described herein again. Therefore, through the flexible adjustment of the setting positions of the abutting plane 2221 and the limiting member 12, the relative positions of the multiple flaring assemblies 20 on one fixing base 10 can be flexibly changed, so that the flaring device 100 can be flexibly adapted to the to-be-flared pipe orifices with various different sizes and intervals.

[0036] The clamping jaw 21 includes a plurality of split jaws 211, and the plurality of split jaws 211 surround to form the clamping jaw 21 along the circumferential direction. When the split jaws 211 are away from each other, the outer diameter of the clamping jaw 21 expands, and when the split jaws 211 approach each other, the outer diameter of the clamping jaw 21 shrinks. A groove 212 is formed in the circumferential direction of the clamping jaw 21, and an elastic member 213 is installed in the groove 212. The inner diameter of the elastic member 213 is smaller than the outer diameter of the bottom of the groove 212 when the clamping jaw 21 is in the state of the smallest outer diameter. In this way, the ejector pin 23 abuts against the inner wall of the clamping jaw 21, actually against the inner walls of the respective split jaws 211, so that the split jaws 211 are away from each other, and at this time the outer diameter of the clamping jaw 21 expands. The elastic member 213 is sleeved on the outer peripheral wall of the clamping jaw 21, which can enable the clamping jaw 21 to return to the initial position after the ejector pin 23 withdraws, and the groove 212 makes it difficult for the elastic member 213 to come off.

[0037] In this embodiment, the jaw 21 includes six split jaws 211. In other embodiments, the jaw 21 can also be composed of 7 or 8 split jaws 211, as long as the jaw 21 that can realize the flaring function is formed by surrounding.

[0038] Specifically, in this embodiment, two grooves 212 are axially formed on the outer side of the jaw 21, and an elastic member 213 is disposed in each groove 212 to further ensure the retraction of the jaw 21 and prevent one of the elastic members 213 from losing its function due to aging after long-term use.

[0039] The elastic member 213 can be made of rubber or plastic material, as long as it has an elastic force to return the jaw 21 to the initial state with the smallest outer diameter.

[0040] The jaw 21 includes an insertion portion 214 and a tapered portion 215. The insertion portion 214 is connected to one end of the tapered portion 215 away from the fixed seat 10. Along the axis of the jaw 21, the outer diameter of the insertion portion 214 is consistent, and the outer diameter of the tapered portion 215 gradually increases in the direction close to the fixed seat 10. The outer diameter of the insertion portion 214 is smaller than the minimum outer diameter of the tapered portion 215. In this way, the insertion portion 214 is used to extend into the pipe orifice, and the consistent outer diameter of the insertion portion 214 can ensure the consistent flaring effect. The minimum outer diameter of the tapered portion 215 is greater than the outer diameter of the insertion portion 214, so that the tapered portion 215 can abut against the end face of the pipe orifice without extending into the pipe orifice, forming a limiting effect of abutting against the end face of the pipe orifice to control the length of the jaw 21 extending into the pipe orifice, which is the length of the insertion portion 214.

[0041] The jaw 21 further includes a connecting portion 216. The connecting portion 216 is connected to the side of the tapered portion 215 away from the insertion portion 214, and the connecting portion 216 is located in the fixed sleeve 22. The ejector pin 23 includes a tapered section 231 and a diameter section 232 connected to each other. The taper of the tapered section 231 is adapted to the tapered portion 215. The diameter section 232 is located in the connecting portion 216 and is slidably engaged with the inner wall of the connecting portion 216. In this way, the connecting portion 216 can guide the moving direction of the ejector pin 23 to make the pushing of the ejector pin 23 more accurate.

[0042] The fixed sleeve 22 includes a fixed section 222, a diameter-expanded section 223, and a diameter-reduced section 224 that are connected in sequence. The fixed section 222 is installed in the installation hole 11. The diameter of the diameter-expanded section 223 is larger than that of the fixed section 222, and the side surface of the diameter-expanded section 223 facing the fixed seat 10 abuts against the fixed seat 10. The jaw 21 is installed in the diameter-reduced section 224. In this way, the fixed section 222 is used to connect with the fixed seat 10. Since the diameter of the diameter-expanded section 223 is larger than that of the fixed section 222, the diameter-expanded section 223 cannot extend into the installation hole 11, but abuts against the side surface of the fixed seat 10 to form an axial limiting effect. The diameter-reduced section 224 is for matching with the jaw 21 to facilitate fixing the jaw 21.

[0043] The abutting plane 2221 is formed on the fixed section 222. Therefore, the installation of the limiting member 12 is to insert it from the outer side wall of the fixed seat 10, pass through the side wall of the fixed seat 10 and extend into the installation hole 11 until it abuts against the abutting plane 2221 of the fixed section 222. Alternatively, in other embodiments, one end of the limiting member 12 can also abut against the abutting plane 2221 on the fixed section 222, and the other end abuts against the wall surface of the installation hole 11.

[0044] The flaring device 100 further includes a locking ring 40. The locking ring 40 is sleeved on the outer peripheral side of the diameter-reduced section 224, and the locking ring 40 extends in the direction away from the diameter-expanded section 223. A part of the jaw 21 is located in the locking ring 40, and an elastic member 213 is installed between the jaw 21 and the locking ring 40. The outer side of the locking ring 40 is located radially outside the groove 212 of the jaw 21, so as to press the elastic member 213 to prevent the elastic member 213 from slipping out of the groove 212, and at the same time form a protective effect on the outer wall of the jaw 21.

[0045] It can be understood that in other embodiments, the locking ring 40 can also be integrally formed with the fixed sleeve 22 to improve the processing efficiency and reduce the assembly steps.

[0046] A connection hole 41 is formed on the locking ring 40, and an installation plane 2241 is formed on the outer side surface of the diameter-reduced section 224. A connecting member 42 is arranged in the connection hole 41, and one end of the connecting member 42 abuts against the installation plane 2241. In this way, the connection strength between the locking ring 40 and the fixed sleeve 22 is improved.

[0047] In other embodiments, the locking ring 40 can also be connected with the fixed sleeve 22 by processes such as welding or bonding, rather than being limited to the connection through the connecting member 42 as described above.

[0048] The flaring device 100 further includes a mounting plate 50, a driving source 31, and a driving plate 32. The fixed seat 10 is connected to one side of the driving plate 32. The driving plate 32 is located inside the fixed seat 10. The driving source 31 is installed on the side of the mounting plate 50 facing away from the fixed seat 10 and is connected to the driving plate 32 through the mounting plate 50. The driving source 31 can drive the driving plate 32 to move along the axial direction of the fixed seat 10. A plurality of push rods 33 are connected to the driving plate 32. One side of the fixing plate bears the fixed seat 10, and the other side bears the driving assembly 30. The driving source 31 adopts a cylinder in this embodiment. The driving source 31 can control the driving plate 32 to move along the axial direction of the fixed seat 10. A plurality of push rods 33 are integrated on the driving plate 32. Therefore, the movement of the driving plate 32 can drive a plurality of push rods 33 to push the ejector pins 23 in each flaring assembly 20 at the same time, so as to realize the simultaneous flaring of a plurality of flaring assemblies 20.

[0049] In this embodiment, the fixed seat 10 is provided with a hollow interior. The driving plate 32 moves inside the fixed seat 10, and the driving plate 32 is adapted to the circular fixed seat 10 and is also set as a circular driving plate 32. In other embodiments, for the convenience of processing, it can also be set as a rectangle.

[0050] Compared with the prior art, the flaring device 100 provided by the present utility model integrates a plurality of flaring assemblies 20 on one fixed seat 10. Therefore, it can perform flaring processing on a plurality of pipe orifices at the same time, and each flaring assembly 20 can flexibly adjust its position through the opening position of the abutting surface on the fixed sleeve 22 to control the interval between the flaring assemblies 20, so as to adapt to pipe orifices with different spacings.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0052] The above-described embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A flaring device, characterized in that, The flaring device includes: A fixed seat (10) provided with a plurality of mounting holes (11) thereon; A plurality of flaring components (20), each of the flaring components (20) being correspondingly mounted in one of the mounting holes (11); A driving component (30) including a plurality of push rods (33), at least a part of each push rod (33) extending into the mounting hole (11) and being capable of moving along the axial direction of the mounting hole (11); Wherein, the flaring component (20) includes a clamping jaw (21), a fixed sleeve (22) and a thimble (23) arranged coaxially. The fixed sleeve (22) has a hollow cavity (221) therein. The clamping jaw (21) is mounted in the hollow cavity (221), and one end thereof extends out of the hollow cavity (221). The thimble (23) is located in the hollow cavity (221), and one end thereof abuts against the push rod (33), and the other end can extend into the clamping jaw (21) as the push rod (33) moves and abut against the inner wall of the clamping jaw (21) to expand the outer diameter of the clamping jaw (21).

2. The flaring device according to claim 1, wherein The fixed sleeve (22) is in clearance fit with the mounting hole (11), and an abutting plane (2221) is provided on the outer wall of the fixed sleeve (22). A limiting member (12) is provided between the abutting plane (2221) and the fixed seat (10). One end of the limiting member (12) abuts against the abutting plane (2221), and the other end is connected to the fixed seat (10).

3. The flaring device according to claim 2, characterized in that, A plurality of the abutting planes (2221) are provided on the circumference of the fixed sleeve (22), and adjacent two of the abutting planes (2221) are arranged at an angle. A limiting member (12) is provided between each abutting plane (2221) and the fixed seat (10).

4. The flaring device according to claim 1, characterized in that, The clamping jaw (21) includes a plurality of split claws (211), and the plurality of split claws (211) surround to form the clamping jaw (21) in the circumferential direction. When the split claws (211) are away from each other, the outer diameter of the clamping jaw (21) expands, and when the split claws (211) are close to each other, the outer diameter of the clamping jaw (21) shrinks; A groove (212) is provided in the circumferential direction of the clamping jaw (21), and an elastic member (213) is mounted in the groove (212). The inner diameter of the elastic member (213) is smaller than the outer diameter of the bottom of the groove (212) of the clamping jaw (21) in the state of the minimum outer diameter.

5. The flaring device according to claim 4, wherein The clamping jaw (21) includes an insertion part (214) and a conical part (215). The insertion part (214) is connected to one end of the conical part (215) away from the fixed seat (10). Along the axial direction of the clamping jaw (21), the outer diameter of the insertion part (214) is consistent, and the outer diameter of the conical part (215) gradually increases along the direction close to the fixed seat (10). The outer diameter of the insertion part (214) is smaller than the minimum outer diameter of the conical part (215).

6. The flaring device according to claim 5, characterized in that, The jaw (21) further includes a connecting portion (216). The connecting portion (216) is connected to a side of the tapered portion (215) away from the insertion portion (214), and the connecting portion (216) is located in the fixed sleeve (22). The ejector pin (23) includes a tapered section (231) and a diameter section (232) connected to each other. The taper of the tapered section (231) is adapted to the tapered portion (215), and the diameter section (232) is located in the connecting portion (216) and is in sliding fit with the inner wall of the connecting portion (216).

7. The flaring device according to claim 1, characterized in that, The fixed sleeve (22) includes a fixed section (222), a diameter-expanded section (223), and a diameter-reduced section (224) connected in sequence. The fixed section (222) is installed in the mounting hole (11). The diameter of the diameter-expanded section (223) is larger than that of the fixed section (222), and a side surface of the diameter-expanded section (223) facing the fixed seat (10) abuts against the fixed seat (10). The jaw (21) is installed in the diameter-reduced section (224).

8. The flaring device according to claim 7, characterized in that, The flaring device further includes a locking ring (40). The locking ring (40) is sleeved on the outer peripheral side of the diameter-reduced section (224), and the locking ring (40) extends in a direction away from the diameter-expanded section (223). A part of the jaw (21) is located in the locking ring (40), and an elastic member (213) is installed between the jaw (21) and the locking ring (40).

9. The flaring device according to claim 8, wherein, A connecting hole (41) is formed in the locking ring (40). A mounting plane (2241) is formed on the outer side surface of the diameter-reduced section (224). A connecting member (42) is arranged in the connecting hole (41), and one end of the connecting member (42) abuts against the mounting plane (2241).

10. The flaring device according to claim 1, wherein The flaring device further includes a mounting plate (50), a driving source (31), and a driving plate (32). The fixed seat (10) is connected to one side of the driving plate (32). The driving plate (32) is located in the fixed seat (10). The driving source (31) is installed on a side of the mounting plate (50) facing away from the fixed seat (10) and is connected to the driving plate (32) through the mounting plate (50). The driving source (31) can drive the driving plate (32) to move axially along the fixed seat (10). A plurality of push rods (33) are connected to the driving plate (32).

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